1 /*
2 * Copyright 2019-2026 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <string.h>
11 #include <openssl/core_names.h>
12 #include <openssl/core_dispatch.h>
13 #include <openssl/rand.h>
14 #include <openssl/params.h>
15 #include <openssl/err.h>
16 #include <openssl/proverr.h>
17 #include <openssl/pkcs12.h>
18 #include <openssl/provider.h>
19 #include <assert.h>
20 #include <openssl/asn1.h>
21 #include <openssl/asn1t.h>
22 #include <openssl/core_object.h>
23 #include "internal/asn1.h"
24 /* For TLS1_3_VERSION */
25 #include <openssl/ssl.h>
26 #include "internal/nelem.h"
27 #include "internal/refcount.h"
28
29 /* error codes */
30
31 /* xorprovider error codes */
32 #define XORPROV_R_INVALID_DIGEST 1
33 #define XORPROV_R_INVALID_SIZE 2
34 #define XORPROV_R_INVALID_KEY 3
35 #define XORPROV_R_UNSUPPORTED 4
36 #define XORPROV_R_MISSING_OID 5
37 #define XORPROV_R_OBJ_CREATE_ERR 6
38 #define XORPROV_R_INVALID_ENCODING 7
39 #define XORPROV_R_SIGN_ERROR 8
40 #define XORPROV_R_LIB_CREATE_ERR 9
41 #define XORPROV_R_NO_PRIVATE_KEY 10
42 #define XORPROV_R_BUFFER_LENGTH_WRONG 11
43 #define XORPROV_R_SIGNING_FAILED 12
44 #define XORPROV_R_WRONG_PARAMETERS 13
45 #define XORPROV_R_VERIFY_ERROR 14
46 #define XORPROV_R_EVPINFO_MISSING 15
47
48 static OSSL_FUNC_keymgmt_import_fn xor_import;
49 static OSSL_FUNC_keymgmt_import_types_fn xor_import_types;
50 static OSSL_FUNC_keymgmt_import_types_ex_fn xor_import_types_ex;
51 static OSSL_FUNC_keymgmt_export_fn xor_export;
52 static OSSL_FUNC_keymgmt_export_types_fn xor_export_types;
53 static OSSL_FUNC_keymgmt_export_types_ex_fn xor_export_types_ex;
54
55 int tls_provider_init(const OSSL_CORE_HANDLE *handle,
56 const OSSL_DISPATCH *in,
57 const OSSL_DISPATCH **out,
58 void **provctx);
59
60 #define XOR_KEY_SIZE 32
61
62 /*
63 * Top secret. This algorithm only works if no one knows what this number is.
64 * Please don't tell anyone what it is.
65 *
66 * This algorithm is for testing only - don't really use it!
67 */
68 static const unsigned char private_constant[XOR_KEY_SIZE] = {
69 0xd3, 0x6b, 0x54, 0xec, 0x5b, 0xac, 0x89, 0x96, 0x8c, 0x2c, 0x66, 0xa5,
70 0x67, 0x0d, 0xe3, 0xdd, 0x43, 0x69, 0xbc, 0x83, 0x3d, 0x60, 0xc7, 0xb8,
71 0x2b, 0x1c, 0x5a, 0xfd, 0xb5, 0xcd, 0xd0, 0xf8
72 };
73
74 typedef struct xorkey_st {
75 unsigned char privkey[XOR_KEY_SIZE];
76 unsigned char pubkey[XOR_KEY_SIZE];
77 int hasprivkey;
78 int haspubkey;
79 char *tls_name;
80 CRYPTO_REF_COUNT references;
81 } XORKEY;
82
83 /* Key Management for the dummy XOR KEX, KEM and signature algorithms */
84
85 static OSSL_FUNC_keymgmt_new_fn xor_newkey;
86 static OSSL_FUNC_keymgmt_free_fn xor_freekey;
87 static OSSL_FUNC_keymgmt_has_fn xor_has;
88 static OSSL_FUNC_keymgmt_dup_fn xor_dup;
89 static OSSL_FUNC_keymgmt_gen_init_fn xor_gen_init;
90 static OSSL_FUNC_keymgmt_gen_set_params_fn xor_gen_set_params;
91 static OSSL_FUNC_keymgmt_gen_settable_params_fn xor_gen_settable_params;
92 static OSSL_FUNC_keymgmt_gen_fn xor_gen;
93 static OSSL_FUNC_keymgmt_gen_cleanup_fn xor_gen_cleanup;
94 static OSSL_FUNC_keymgmt_load_fn xor_load;
95 static OSSL_FUNC_keymgmt_get_params_fn xor_get_params;
96 static OSSL_FUNC_keymgmt_gettable_params_fn xor_gettable_params;
97 static OSSL_FUNC_keymgmt_set_params_fn xor_set_params;
98 static OSSL_FUNC_keymgmt_settable_params_fn xor_settable_params;
99
100 /*
101 * Dummy "XOR" Key Exchange algorithm. We just xor the private and public keys
102 * together. Don't use this!
103 */
104
105 static OSSL_FUNC_keyexch_newctx_fn xor_newkemkexctx;
106 static OSSL_FUNC_keyexch_init_fn xor_init;
107 static OSSL_FUNC_keyexch_set_peer_fn xor_set_peer;
108 static OSSL_FUNC_keyexch_derive_fn xor_derive;
109 static OSSL_FUNC_keyexch_freectx_fn xor_freectx;
110 static OSSL_FUNC_keyexch_dupctx_fn xor_dupctx;
111
112 /*
113 * Dummy "XOR" Key Encapsulation Method. We just build a KEM over the xor KEX.
114 * Don't use this!
115 */
116
117 static OSSL_FUNC_kem_newctx_fn xor_newkemkexctx;
118 static OSSL_FUNC_kem_freectx_fn xor_freectx;
119 static OSSL_FUNC_kem_dupctx_fn xor_dupctx;
120 static OSSL_FUNC_kem_encapsulate_init_fn xor_init;
121 static OSSL_FUNC_kem_encapsulate_fn xor_encapsulate;
122 static OSSL_FUNC_kem_decapsulate_init_fn xor_init;
123 static OSSL_FUNC_kem_decapsulate_fn xor_decapsulate;
124
125 /*
126 * Common key management table access functions
127 */
128 static OSSL_FUNC_keymgmt_new_fn *
xor_prov_get_keymgmt_new(const OSSL_DISPATCH * fns)129 xor_prov_get_keymgmt_new(const OSSL_DISPATCH *fns)
130 {
131 /* Pilfer the keymgmt dispatch table */
132 for (; fns->function_id != 0; fns++)
133 if (fns->function_id == OSSL_FUNC_KEYMGMT_NEW)
134 return OSSL_FUNC_keymgmt_new(fns);
135
136 return NULL;
137 }
138
139 static OSSL_FUNC_keymgmt_free_fn *
xor_prov_get_keymgmt_free(const OSSL_DISPATCH * fns)140 xor_prov_get_keymgmt_free(const OSSL_DISPATCH *fns)
141 {
142 /* Pilfer the keymgmt dispatch table */
143 for (; fns->function_id != 0; fns++)
144 if (fns->function_id == OSSL_FUNC_KEYMGMT_FREE)
145 return OSSL_FUNC_keymgmt_free(fns);
146
147 return NULL;
148 }
149
150 static OSSL_FUNC_keymgmt_import_fn *
xor_prov_get_keymgmt_import(const OSSL_DISPATCH * fns)151 xor_prov_get_keymgmt_import(const OSSL_DISPATCH *fns)
152 {
153 /* Pilfer the keymgmt dispatch table */
154 for (; fns->function_id != 0; fns++)
155 if (fns->function_id == OSSL_FUNC_KEYMGMT_IMPORT)
156 return OSSL_FUNC_keymgmt_import(fns);
157
158 return NULL;
159 }
160
161 static OSSL_FUNC_keymgmt_export_fn *
xor_prov_get_keymgmt_export(const OSSL_DISPATCH * fns)162 xor_prov_get_keymgmt_export(const OSSL_DISPATCH *fns)
163 {
164 /* Pilfer the keymgmt dispatch table */
165 for (; fns->function_id != 0; fns++)
166 if (fns->function_id == OSSL_FUNC_KEYMGMT_EXPORT)
167 return OSSL_FUNC_keymgmt_export(fns);
168
169 return NULL;
170 }
171
xor_prov_import_key(const OSSL_DISPATCH * fns,void * provctx,int selection,const OSSL_PARAM params[])172 static void *xor_prov_import_key(const OSSL_DISPATCH *fns, void *provctx,
173 int selection, const OSSL_PARAM params[])
174 {
175 OSSL_FUNC_keymgmt_new_fn *kmgmt_new = xor_prov_get_keymgmt_new(fns);
176 OSSL_FUNC_keymgmt_free_fn *kmgmt_free = xor_prov_get_keymgmt_free(fns);
177 OSSL_FUNC_keymgmt_import_fn *kmgmt_import = xor_prov_get_keymgmt_import(fns);
178 void *key = NULL;
179
180 if (kmgmt_new != NULL && kmgmt_import != NULL && kmgmt_free != NULL) {
181 if ((key = kmgmt_new(provctx)) == NULL
182 || !kmgmt_import(key, selection, params)) {
183 kmgmt_free(key);
184 key = NULL;
185 }
186 }
187 return key;
188 }
189
xor_prov_free_key(const OSSL_DISPATCH * fns,void * key)190 static void xor_prov_free_key(const OSSL_DISPATCH *fns, void *key)
191 {
192 OSSL_FUNC_keymgmt_free_fn *kmgmt_free = xor_prov_get_keymgmt_free(fns);
193
194 if (kmgmt_free != NULL)
195 kmgmt_free(key);
196 }
197
198 /*
199 * We define 2 dummy TLS groups called "xorgroup" and "xorkemgroup" for test
200 * purposes
201 */
202 struct tls_group_st {
203 unsigned int group_id; /* for "tls-group-id", see provider-base(7) */
204 unsigned int secbits;
205 unsigned int mintls;
206 unsigned int maxtls;
207 unsigned int mindtls;
208 unsigned int maxdtls;
209 unsigned int is_kem; /* boolean */
210 };
211
212 #define XORGROUP_NAME "xorgroup"
213 #define XORGROUP_NAME_INTERNAL "xorgroup-int"
214 static struct tls_group_st xor_group = {
215 0, /* group_id, set by randomize_tls_alg_id() */
216 128, /* secbits */
217 TLS1_3_VERSION, /* mintls */
218 0, /* maxtls */
219 -1, /* mindtls */
220 -1, /* maxdtls */
221 0 /* is_kem */
222 };
223
224 #define XORKEMGROUP_NAME "xorkemgroup"
225 #define XORKEMGROUP_NAME_INTERNAL "xorkemgroup-int"
226 static struct tls_group_st xor_kemgroup = {
227 0, /* group_id, set by randomize_tls_alg_id() */
228 128, /* secbits */
229 TLS1_3_VERSION, /* mintls */
230 0, /* maxtls */
231 -1, /* mindtls */
232 -1, /* maxdtls */
233 1 /* is_kem */
234 };
235
236 #define ALGORITHM "XOR"
237
238 static const OSSL_PARAM xor_group_params[] = {
239 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_NAME,
240 XORGROUP_NAME, sizeof(XORGROUP_NAME)),
241 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL,
242 XORGROUP_NAME_INTERNAL,
243 sizeof(XORGROUP_NAME_INTERNAL)),
244 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_ALG, ALGORITHM,
245 sizeof(ALGORITHM)),
246 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_ID, &xor_group.group_id),
247 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS,
248 &xor_group.secbits),
249 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MIN_TLS, &xor_group.mintls),
250 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MAX_TLS, &xor_group.maxtls),
251 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS, &xor_group.mindtls),
252 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS, &xor_group.maxdtls),
253 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_IS_KEM, &xor_group.is_kem),
254 OSSL_PARAM_END
255 };
256
257 static const OSSL_PARAM xor_kemgroup_params[] = {
258 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_NAME,
259 XORKEMGROUP_NAME, sizeof(XORKEMGROUP_NAME)),
260 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_NAME_INTERNAL,
261 XORKEMGROUP_NAME_INTERNAL,
262 sizeof(XORKEMGROUP_NAME_INTERNAL)),
263 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_GROUP_ALG, ALGORITHM,
264 sizeof(ALGORITHM)),
265 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_ID, &xor_kemgroup.group_id),
266 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_SECURITY_BITS,
267 &xor_kemgroup.secbits),
268 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MIN_TLS, &xor_kemgroup.mintls),
269 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MAX_TLS, &xor_kemgroup.maxtls),
270 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MIN_DTLS, &xor_kemgroup.mindtls),
271 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_GROUP_MAX_DTLS, &xor_kemgroup.maxdtls),
272 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_GROUP_IS_KEM, &xor_kemgroup.is_kem),
273 OSSL_PARAM_END
274 };
275
276 #define NUM_DUMMY_GROUPS 50
277 static char *dummy_group_names[NUM_DUMMY_GROUPS];
278
279 /*
280 * We define a dummy TLS sigalg called for test purposes
281 */
282 struct tls_sigalg_st {
283 unsigned int code_point; /* for "tls-sigalg-alg", see provider-base(7) */
284 unsigned int secbits;
285 unsigned int mintls;
286 unsigned int maxtls;
287 };
288
289 #define XORSIGALG_NAME "xorhmacsig"
290 #define XORSIGALG_OID "1.3.6.1.4.1.16604.998888.1"
291 #define XORSIGALG_HASH_NAME "xorhmacsha2sig"
292 #define XORSIGALG_HASH "SHA256"
293 #define XORSIGALG_HASH_OID "1.3.6.1.4.1.16604.998888.2"
294 #define XORSIGALG12_NAME "xorhmacsig12"
295 #define XORSIGALG12_OID "1.3.6.1.4.1.16604.998888.3"
296
297 static struct tls_sigalg_st xor_sigalg = {
298 0, /* alg id, set by randomize_tls_alg_id() */
299 128, /* secbits */
300 TLS1_3_VERSION, /* mintls */
301 0, /* maxtls */
302 };
303
304 static struct tls_sigalg_st xor_sigalg_hash = {
305 0, /* alg id, set by randomize_tls_alg_id() */
306 128, /* secbits */
307 TLS1_3_VERSION, /* mintls */
308 0, /* maxtls */
309 };
310
311 static struct tls_sigalg_st xor_sigalg12 = {
312 0, /* alg id, set by randomize_tls_alg_id() */
313 128, /* secbits */
314 TLS1_2_VERSION, /* mintls */
315 TLS1_2_VERSION, /* maxtls */
316 };
317
318 static const OSSL_PARAM xor_sig_nohash_params[] = {
319 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME,
320 XORSIGALG_NAME, sizeof(XORSIGALG_NAME)),
321 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_NAME,
322 XORSIGALG_NAME,
323 sizeof(XORSIGALG_NAME)),
324 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_OID,
325 XORSIGALG_OID, sizeof(XORSIGALG_OID)),
326 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT,
327 &xor_sigalg.code_point),
328 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS,
329 &xor_sigalg.secbits),
330 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS,
331 &xor_sigalg.mintls),
332 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS,
333 &xor_sigalg.maxtls),
334 OSSL_PARAM_END
335 };
336
337 static const OSSL_PARAM xor_sig_hash_params[] = {
338 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME,
339 XORSIGALG_HASH_NAME, sizeof(XORSIGALG_HASH_NAME)),
340 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_NAME,
341 XORSIGALG_HASH_NAME,
342 sizeof(XORSIGALG_HASH_NAME)),
343 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_HASH_NAME,
344 XORSIGALG_HASH, sizeof(XORSIGALG_HASH)),
345 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_OID,
346 XORSIGALG_HASH_OID, sizeof(XORSIGALG_HASH_OID)),
347 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT,
348 &xor_sigalg_hash.code_point),
349 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS,
350 &xor_sigalg_hash.secbits),
351 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS,
352 &xor_sigalg_hash.mintls),
353 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS,
354 &xor_sigalg_hash.maxtls),
355 OSSL_PARAM_END
356 };
357
358 static const OSSL_PARAM xor_sig_12_params[] = {
359 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_IANA_NAME,
360 XORSIGALG12_NAME, sizeof(XORSIGALG12_NAME)),
361 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_NAME,
362 XORSIGALG12_NAME,
363 sizeof(XORSIGALG12_NAME)),
364 OSSL_PARAM_utf8_string(OSSL_CAPABILITY_TLS_SIGALG_OID,
365 XORSIGALG12_OID, sizeof(XORSIGALG12_OID)),
366 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_CODE_POINT,
367 &xor_sigalg12.code_point),
368 OSSL_PARAM_uint(OSSL_CAPABILITY_TLS_SIGALG_SECURITY_BITS,
369 &xor_sigalg12.secbits),
370 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MIN_TLS,
371 &xor_sigalg12.mintls),
372 OSSL_PARAM_int(OSSL_CAPABILITY_TLS_SIGALG_MAX_TLS,
373 &xor_sigalg12.maxtls),
374 OSSL_PARAM_END
375 };
376
tls_prov_get_capabilities(void * provctx,const char * capability,OSSL_CALLBACK * cb,void * arg)377 static int tls_prov_get_capabilities(void *provctx, const char *capability,
378 OSSL_CALLBACK *cb, void *arg)
379 {
380 int ret = 0;
381 int i;
382 const char *dummy_base = "dummy";
383 const size_t dummy_name_max_size = strlen(dummy_base) + 3;
384
385 if (strcmp(capability, "TLS-GROUP") == 0) {
386 /* Register our 2 groups */
387 OPENSSL_assert(xor_group.group_id >= 65024
388 && xor_group.group_id < 65279 - NUM_DUMMY_GROUPS);
389 ret = cb(xor_group_params, arg);
390 ret &= cb(xor_kemgroup_params, arg);
391
392 /*
393 * Now register some dummy groups > GROUPLIST_INCREMENT (== 40) as defined
394 * in ssl/t1_lib.c, to make sure we exercise the code paths for registering
395 * large numbers of groups.
396 */
397
398 for (i = 0; i < NUM_DUMMY_GROUPS; i++) {
399 OSSL_PARAM dummygroup[OSSL_NELEM(xor_group_params)];
400 unsigned int dummygroup_id;
401
402 memcpy(dummygroup, xor_group_params, sizeof(xor_group_params));
403
404 /* Give the dummy group a unique name */
405 if (dummy_group_names[i] == NULL) {
406 dummy_group_names[i] = OPENSSL_zalloc(dummy_name_max_size);
407 if (dummy_group_names[i] == NULL)
408 return 0;
409 BIO_snprintf(dummy_group_names[i],
410 dummy_name_max_size,
411 "%s%d", dummy_base, i);
412 }
413 dummygroup[0].data = dummy_group_names[i];
414 dummygroup[0].data_size = strlen(dummy_group_names[i]) + 1;
415 /* assign unique group IDs also to dummy groups for registration */
416 dummygroup_id = 65279 - NUM_DUMMY_GROUPS + i;
417 dummygroup[3].data = (unsigned char *)&dummygroup_id;
418 ret &= cb(dummygroup, arg);
419 }
420 }
421
422 if (strcmp(capability, "TLS-SIGALG") == 0) {
423 ret = cb(xor_sig_nohash_params, arg);
424 ret &= cb(xor_sig_hash_params, arg);
425 ret &= cb(xor_sig_12_params, arg);
426 }
427 return ret;
428 }
429
430 typedef struct {
431 OSSL_LIB_CTX *libctx;
432 } PROV_XOR_CTX;
433
xor_newprovctx(OSSL_LIB_CTX * libctx)434 static PROV_XOR_CTX *xor_newprovctx(OSSL_LIB_CTX *libctx)
435 {
436 PROV_XOR_CTX *prov_ctx = OPENSSL_malloc(sizeof(PROV_XOR_CTX));
437
438 if (prov_ctx == NULL)
439 return NULL;
440
441 if (libctx == NULL) {
442 OPENSSL_free(prov_ctx);
443 return NULL;
444 }
445 prov_ctx->libctx = libctx;
446 return prov_ctx;
447 }
448
449 #define PROV_XOR_LIBCTX_OF(provctx) (((PROV_XOR_CTX *)provctx)->libctx)
450
451 /*
452 * Dummy "XOR" Key Exchange and signature algorithm. We just xor the
453 * private and public keys together. Don't use this!
454 */
455
456 typedef struct {
457 XORKEY *key;
458 XORKEY *peerkey;
459 void *provctx;
460 } PROV_XORKEMKEX_CTX;
461
xor_newkemkexctx(void * provctx)462 static void *xor_newkemkexctx(void *provctx)
463 {
464 PROV_XORKEMKEX_CTX *pxorctx = OPENSSL_zalloc(sizeof(PROV_XORKEMKEX_CTX));
465
466 if (pxorctx == NULL)
467 return NULL;
468
469 pxorctx->provctx = provctx;
470
471 return pxorctx;
472 }
473
xor_init(void * vpxorctx,void * vkey,ossl_unused const OSSL_PARAM params[])474 static int xor_init(void *vpxorctx, void *vkey,
475 ossl_unused const OSSL_PARAM params[])
476 {
477 PROV_XORKEMKEX_CTX *pxorctx = (PROV_XORKEMKEX_CTX *)vpxorctx;
478
479 if (pxorctx == NULL || vkey == NULL)
480 return 0;
481 pxorctx->key = vkey;
482 return 1;
483 }
484
xor_set_peer(void * vpxorctx,void * vpeerkey)485 static int xor_set_peer(void *vpxorctx, void *vpeerkey)
486 {
487 PROV_XORKEMKEX_CTX *pxorctx = (PROV_XORKEMKEX_CTX *)vpxorctx;
488
489 if (pxorctx == NULL || vpeerkey == NULL)
490 return 0;
491 pxorctx->peerkey = vpeerkey;
492 return 1;
493 }
494
xor_derive(void * vpxorctx,unsigned char * secret,size_t * secretlen,size_t outlen)495 static int xor_derive(void *vpxorctx, unsigned char *secret, size_t *secretlen,
496 size_t outlen)
497 {
498 PROV_XORKEMKEX_CTX *pxorctx = (PROV_XORKEMKEX_CTX *)vpxorctx;
499 int i;
500
501 if (pxorctx->key == NULL || pxorctx->peerkey == NULL)
502 return 0;
503
504 *secretlen = XOR_KEY_SIZE;
505 if (secret == NULL)
506 return 1;
507
508 if (outlen < XOR_KEY_SIZE)
509 return 0;
510
511 for (i = 0; i < XOR_KEY_SIZE; i++)
512 secret[i] = pxorctx->key->privkey[i] ^ pxorctx->peerkey->pubkey[i];
513
514 return 1;
515 }
516
xor_freectx(void * pxorctx)517 static void xor_freectx(void *pxorctx)
518 {
519 OPENSSL_free(pxorctx);
520 }
521
xor_dupctx(void * vpxorctx)522 static void *xor_dupctx(void *vpxorctx)
523 {
524 PROV_XORKEMKEX_CTX *srcctx = (PROV_XORKEMKEX_CTX *)vpxorctx;
525 PROV_XORKEMKEX_CTX *dstctx;
526
527 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
528 if (dstctx == NULL)
529 return NULL;
530
531 *dstctx = *srcctx;
532
533 return dstctx;
534 }
535
536 static const OSSL_DISPATCH xor_keyexch_functions[] = {
537 { OSSL_FUNC_KEYEXCH_NEWCTX, (void (*)(void))xor_newkemkexctx },
538 { OSSL_FUNC_KEYEXCH_INIT, (void (*)(void))xor_init },
539 { OSSL_FUNC_KEYEXCH_DERIVE, (void (*)(void))xor_derive },
540 { OSSL_FUNC_KEYEXCH_SET_PEER, (void (*)(void))xor_set_peer },
541 { OSSL_FUNC_KEYEXCH_FREECTX, (void (*)(void))xor_freectx },
542 { OSSL_FUNC_KEYEXCH_DUPCTX, (void (*)(void))xor_dupctx },
543 OSSL_DISPATCH_END
544 };
545
546 static const OSSL_ALGORITHM tls_prov_keyexch[] = {
547 /*
548 * Obviously this is not FIPS approved, but in order to test in conjunction
549 * with the FIPS provider we pretend that it is.
550 */
551 { "XOR", "provider=tls-provider,fips=yes", xor_keyexch_functions },
552 { NULL, NULL, NULL }
553 };
554
555 /*
556 * Dummy "XOR" Key Encapsulation Method. We just build a KEM over the xor KEX.
557 * Don't use this!
558 */
559
xor_encapsulate(void * vpxorctx,unsigned char * ct,size_t * ctlen,unsigned char * ss,size_t * sslen)560 static int xor_encapsulate(void *vpxorctx,
561 unsigned char *ct, size_t *ctlen,
562 unsigned char *ss, size_t *sslen)
563 {
564 /*
565 * We are building this around a KEX:
566 *
567 * 1. we generate ephemeral keypair
568 * 2. we encode our ephemeral pubkey as the outgoing ct
569 * 3. we derive using our ephemeral privkey in combination with the peer
570 * pubkey from the ctx; the result is our ss.
571 */
572 int rv = 0;
573 void *genctx = NULL, *derivectx = NULL;
574 XORKEY *ourkey = NULL;
575 PROV_XORKEMKEX_CTX *pxorctx = vpxorctx;
576
577 if (ct == NULL || ss == NULL) {
578 /* Just return sizes */
579
580 if (ctlen == NULL && sslen == NULL)
581 return 0;
582 if (ctlen != NULL)
583 *ctlen = XOR_KEY_SIZE;
584 if (sslen != NULL)
585 *sslen = XOR_KEY_SIZE;
586 return 1;
587 }
588
589 /* 1. Generate keypair */
590 genctx = xor_gen_init(pxorctx->provctx, OSSL_KEYMGMT_SELECT_KEYPAIR, NULL);
591 if (genctx == NULL)
592 goto end;
593 ourkey = xor_gen(genctx, NULL, NULL);
594 if (ourkey == NULL)
595 goto end;
596
597 /* 2. Encode ephemeral pubkey as ct */
598 memcpy(ct, ourkey->pubkey, XOR_KEY_SIZE);
599 *ctlen = XOR_KEY_SIZE;
600
601 /* 3. Derive ss via KEX */
602 derivectx = xor_newkemkexctx(pxorctx->provctx);
603 if (derivectx == NULL
604 || !xor_init(derivectx, ourkey, NULL)
605 || !xor_set_peer(derivectx, pxorctx->key)
606 || !xor_derive(derivectx, ss, sslen, XOR_KEY_SIZE))
607 goto end;
608
609 rv = 1;
610
611 end:
612 xor_gen_cleanup(genctx);
613 xor_freekey(ourkey);
614 xor_freectx(derivectx);
615 return rv;
616 }
617
xor_decapsulate(void * vpxorctx,unsigned char * ss,size_t * sslen,const unsigned char * ct,size_t ctlen)618 static int xor_decapsulate(void *vpxorctx,
619 unsigned char *ss, size_t *sslen,
620 const unsigned char *ct, size_t ctlen)
621 {
622 /*
623 * We are building this around a KEX:
624 *
625 * - ct is our peer's pubkey
626 * - decapsulate is just derive.
627 */
628 int rv = 0;
629 void *derivectx = NULL;
630 XORKEY *peerkey = NULL;
631 PROV_XORKEMKEX_CTX *pxorctx = vpxorctx;
632
633 if (ss == NULL) {
634 /* Just return size */
635 if (sslen == NULL)
636 return 0;
637 *sslen = XOR_KEY_SIZE;
638 return 1;
639 }
640
641 if (ctlen != XOR_KEY_SIZE)
642 return 0;
643 peerkey = xor_newkey(pxorctx->provctx);
644 if (peerkey == NULL)
645 goto end;
646 memcpy(peerkey->pubkey, ct, XOR_KEY_SIZE);
647
648 /* Derive ss via KEX */
649 derivectx = xor_newkemkexctx(pxorctx->provctx);
650 if (derivectx == NULL
651 || !xor_init(derivectx, pxorctx->key, NULL)
652 || !xor_set_peer(derivectx, peerkey)
653 || !xor_derive(derivectx, ss, sslen, XOR_KEY_SIZE))
654 goto end;
655
656 rv = 1;
657
658 end:
659 xor_freekey(peerkey);
660 xor_freectx(derivectx);
661 return rv;
662 }
663
664 static const OSSL_DISPATCH xor_kem_functions[] = {
665 { OSSL_FUNC_KEM_NEWCTX, (void (*)(void))xor_newkemkexctx },
666 { OSSL_FUNC_KEM_FREECTX, (void (*)(void))xor_freectx },
667 { OSSL_FUNC_KEM_DUPCTX, (void (*)(void))xor_dupctx },
668 { OSSL_FUNC_KEM_ENCAPSULATE_INIT, (void (*)(void))xor_init },
669 { OSSL_FUNC_KEM_ENCAPSULATE, (void (*)(void))xor_encapsulate },
670 { OSSL_FUNC_KEM_DECAPSULATE_INIT, (void (*)(void))xor_init },
671 { OSSL_FUNC_KEM_DECAPSULATE, (void (*)(void))xor_decapsulate },
672 OSSL_DISPATCH_END
673 };
674
675 static const OSSL_ALGORITHM tls_prov_kem[] = {
676 /*
677 * Obviously this is not FIPS approved, but in order to test in conjunction
678 * with the FIPS provider we pretend that it is.
679 */
680 { "XOR", "provider=tls-provider,fips=yes", xor_kem_functions },
681 { NULL, NULL, NULL }
682 };
683
684 /* Key Management for the dummy XOR key exchange algorithm */
685
xor_newkey(void * provctx)686 static void *xor_newkey(void *provctx)
687 {
688 XORKEY *ret = OPENSSL_zalloc(sizeof(XORKEY));
689
690 if (ret == NULL)
691 return NULL;
692
693 if (!CRYPTO_NEW_REF(&ret->references, 1)) {
694 OPENSSL_free(ret);
695 return NULL;
696 }
697
698 return ret;
699 }
700
xor_freekey(void * keydata)701 static void xor_freekey(void *keydata)
702 {
703 XORKEY *key = (XORKEY *)keydata;
704 int refcnt;
705
706 if (key == NULL)
707 return;
708
709 if (CRYPTO_DOWN_REF(&key->references, &refcnt) <= 0)
710 return;
711
712 if (refcnt > 0)
713 return;
714 assert(refcnt == 0);
715
716 if (key != NULL) {
717 OPENSSL_free(key->tls_name);
718 key->tls_name = NULL;
719 }
720 CRYPTO_FREE_REF(&key->references);
721 OPENSSL_free(key);
722 }
723
xor_key_up_ref(XORKEY * key)724 static int xor_key_up_ref(XORKEY *key)
725 {
726 int refcnt;
727
728 if (CRYPTO_UP_REF(&key->references, &refcnt) <= 0)
729 return 0;
730
731 assert(refcnt > 1);
732 return (refcnt > 1);
733 }
734
xor_has(const void * vkey,int selection)735 static int xor_has(const void *vkey, int selection)
736 {
737 const XORKEY *key = vkey;
738 int ok = 0;
739
740 if (key != NULL) {
741 ok = 1;
742
743 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0)
744 ok = ok && key->haspubkey;
745 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0)
746 ok = ok && key->hasprivkey;
747 }
748 return ok;
749 }
750
xor_dup(const void * vfromkey,int selection)751 static void *xor_dup(const void *vfromkey, int selection)
752 {
753 XORKEY *tokey = xor_newkey(NULL);
754 const XORKEY *fromkey = vfromkey;
755 int ok = 0;
756
757 if (tokey != NULL && fromkey != NULL) {
758 ok = 1;
759
760 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
761 if (fromkey->haspubkey) {
762 memcpy(tokey->pubkey, fromkey->pubkey, XOR_KEY_SIZE);
763 tokey->haspubkey = 1;
764 } else {
765 tokey->haspubkey = 0;
766 }
767 }
768 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
769 if (fromkey->hasprivkey) {
770 memcpy(tokey->privkey, fromkey->privkey, XOR_KEY_SIZE);
771 tokey->hasprivkey = 1;
772 } else {
773 tokey->hasprivkey = 0;
774 }
775 }
776 if (fromkey->tls_name != NULL)
777 tokey->tls_name = OPENSSL_strdup(fromkey->tls_name);
778 }
779 if (!ok) {
780 xor_freekey(tokey);
781 tokey = NULL;
782 }
783 return tokey;
784 }
785
xor_get_params(void * vkey,OSSL_PARAM params[])786 static ossl_inline int xor_get_params(void *vkey, OSSL_PARAM params[])
787 {
788 XORKEY *key = vkey;
789 OSSL_PARAM *p;
790
791 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_BITS)) != NULL
792 && !OSSL_PARAM_set_int(p, XOR_KEY_SIZE))
793 return 0;
794
795 if ((p = OSSL_PARAM_locate(params, OSSL_PKEY_PARAM_SECURITY_BITS)) != NULL
796 && !OSSL_PARAM_set_int(p, xor_group.secbits))
797 return 0;
798
799 if ((p = OSSL_PARAM_locate(params,
800 OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY))
801 != NULL) {
802 if (p->data_type != OSSL_PARAM_OCTET_STRING)
803 return 0;
804 p->return_size = XOR_KEY_SIZE;
805 if (p->data != NULL && p->data_size >= XOR_KEY_SIZE)
806 memcpy(p->data, key->pubkey, XOR_KEY_SIZE);
807 }
808
809 return 1;
810 }
811
812 static const OSSL_PARAM xor_params[] = {
813 OSSL_PARAM_int(OSSL_PKEY_PARAM_BITS, NULL),
814 OSSL_PARAM_int(OSSL_PKEY_PARAM_SECURITY_BITS, NULL),
815 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0),
816 OSSL_PARAM_END
817 };
818
xor_gettable_params(void * provctx)819 static const OSSL_PARAM *xor_gettable_params(void *provctx)
820 {
821 return xor_params;
822 }
823
xor_set_params(void * vkey,const OSSL_PARAM params[])824 static int xor_set_params(void *vkey, const OSSL_PARAM params[])
825 {
826 XORKEY *key = vkey;
827 const OSSL_PARAM *p;
828
829 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY);
830 if (p != NULL) {
831 if (p->data_type != OSSL_PARAM_OCTET_STRING
832 || p->data_size != XOR_KEY_SIZE)
833 return 0;
834 memcpy(key->pubkey, p->data, XOR_KEY_SIZE);
835 key->haspubkey = 1;
836 }
837
838 return 1;
839 }
840
841 static const OSSL_PARAM xor_known_settable_params[] = {
842 OSSL_PARAM_octet_string(OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY, NULL, 0),
843 OSSL_PARAM_END
844 };
845
xor_load(const void * reference,size_t reference_sz)846 static void *xor_load(const void *reference, size_t reference_sz)
847 {
848 XORKEY *key = NULL;
849
850 if (reference_sz == sizeof(key)) {
851 /* The contents of the reference is the address to our object */
852 key = *(XORKEY **)reference;
853 /* We grabbed, so we detach it */
854 *(XORKEY **)reference = NULL;
855 return key;
856 }
857 return NULL;
858 }
859
860 /* check one key is the "XOR complement" of the other */
xor_recreate(const unsigned char * kd1,const unsigned char * kd2)861 static int xor_recreate(const unsigned char *kd1, const unsigned char *kd2)
862 {
863 int i;
864
865 for (i = 0; i < XOR_KEY_SIZE; i++) {
866 if ((kd1[i] & 0xff) != ((kd2[i] ^ private_constant[i]) & 0xff))
867 return 0;
868 }
869 return 1;
870 }
871
xor_match(const void * keydata1,const void * keydata2,int selection)872 static int xor_match(const void *keydata1, const void *keydata2, int selection)
873 {
874 const XORKEY *key1 = keydata1;
875 const XORKEY *key2 = keydata2;
876 int ok = 1;
877
878 if (key1->tls_name != NULL && key2->tls_name != NULL)
879 ok = ok & (strcmp(key1->tls_name, key2->tls_name) == 0);
880
881 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
882 if (key1->hasprivkey) {
883 if (key2->hasprivkey)
884 ok = ok & (CRYPTO_memcmp(key1->privkey, key2->privkey, XOR_KEY_SIZE) == 0);
885 else
886 ok = ok & xor_recreate(key1->privkey, key2->pubkey);
887 } else {
888 if (key2->hasprivkey)
889 ok = ok & xor_recreate(key2->privkey, key1->pubkey);
890 else
891 ok = 0;
892 }
893 }
894
895 if ((selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
896 if (key1->haspubkey) {
897 if (key2->haspubkey)
898 ok = ok & (CRYPTO_memcmp(key1->pubkey, key2->pubkey, XOR_KEY_SIZE) == 0);
899 else
900 ok = ok & xor_recreate(key1->pubkey, key2->privkey);
901 } else {
902 if (key2->haspubkey)
903 ok = ok & xor_recreate(key2->pubkey, key1->privkey);
904 else
905 ok = 0;
906 }
907 }
908
909 return ok;
910 }
911
xor_settable_params(void * provctx)912 static const OSSL_PARAM *xor_settable_params(void *provctx)
913 {
914 return xor_known_settable_params;
915 }
916
917 struct xor_gen_ctx {
918 int selection;
919 OSSL_LIB_CTX *libctx;
920 };
921
xor_gen_init(void * provctx,int selection,const OSSL_PARAM params[])922 static void *xor_gen_init(void *provctx, int selection,
923 const OSSL_PARAM params[])
924 {
925 struct xor_gen_ctx *gctx = NULL;
926
927 if ((selection & (OSSL_KEYMGMT_SELECT_KEYPAIR | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS)) == 0)
928 return NULL;
929
930 if ((gctx = OPENSSL_zalloc(sizeof(*gctx))) == NULL)
931 return NULL;
932
933 gctx->selection = selection;
934 gctx->libctx = PROV_XOR_LIBCTX_OF(provctx);
935
936 if (!xor_gen_set_params(gctx, params)) {
937 OPENSSL_free(gctx);
938 return NULL;
939 }
940 return gctx;
941 }
942
xor_gen_set_params(void * genctx,const OSSL_PARAM params[])943 static int xor_gen_set_params(void *genctx, const OSSL_PARAM params[])
944 {
945 struct xor_gen_ctx *gctx = genctx;
946 const OSSL_PARAM *p;
947
948 if (gctx == NULL)
949 return 0;
950
951 p = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_GROUP_NAME);
952 if (p != NULL) {
953 if (p->data_type != OSSL_PARAM_UTF8_STRING
954 || (strcmp(p->data, XORGROUP_NAME_INTERNAL) != 0
955 && strcmp(p->data, XORKEMGROUP_NAME_INTERNAL) != 0))
956 return 0;
957 }
958
959 return 1;
960 }
961
xor_gen_settable_params(ossl_unused void * genctx,ossl_unused void * provctx)962 static const OSSL_PARAM *xor_gen_settable_params(ossl_unused void *genctx,
963 ossl_unused void *provctx)
964 {
965 static OSSL_PARAM settable[] = {
966 OSSL_PARAM_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME, NULL, 0),
967 OSSL_PARAM_END
968 };
969 return settable;
970 }
971
xor_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)972 static void *xor_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
973 {
974 struct xor_gen_ctx *gctx = genctx;
975 XORKEY *key = xor_newkey(NULL);
976 size_t i;
977
978 if (key == NULL)
979 return NULL;
980
981 if ((gctx->selection & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0) {
982 if (RAND_bytes_ex(gctx->libctx, key->privkey, XOR_KEY_SIZE, 0) <= 0) {
983 OPENSSL_free(key);
984 return NULL;
985 }
986 for (i = 0; i < XOR_KEY_SIZE; i++)
987 key->pubkey[i] = key->privkey[i] ^ private_constant[i];
988 key->hasprivkey = 1;
989 key->haspubkey = 1;
990 }
991
992 return key;
993 }
994
995 /* IMPORT + EXPORT */
996
xor_import(void * vkey,int select,const OSSL_PARAM params[])997 static int xor_import(void *vkey, int select, const OSSL_PARAM params[])
998 {
999 XORKEY *key = vkey;
1000 const OSSL_PARAM *param_priv_key, *param_pub_key;
1001 unsigned char privkey[XOR_KEY_SIZE];
1002 unsigned char pubkey[XOR_KEY_SIZE];
1003 void *pprivkey = privkey, *ppubkey = pubkey;
1004 size_t priv_len = 0, pub_len = 0;
1005 int res = 0;
1006
1007 if (key == NULL || (select & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
1008 return 0;
1009
1010 memset(privkey, 0, sizeof(privkey));
1011 memset(pubkey, 0, sizeof(pubkey));
1012 param_priv_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PRIV_KEY);
1013 param_pub_key = OSSL_PARAM_locate_const(params, OSSL_PKEY_PARAM_PUB_KEY);
1014
1015 if ((param_priv_key != NULL
1016 && !OSSL_PARAM_get_octet_string(param_priv_key, &pprivkey,
1017 sizeof(privkey), &priv_len))
1018 || (param_pub_key != NULL
1019 && !OSSL_PARAM_get_octet_string(param_pub_key, &ppubkey,
1020 sizeof(pubkey), &pub_len)))
1021 goto err;
1022
1023 if (priv_len > 0) {
1024 memcpy(key->privkey, privkey, priv_len);
1025 key->hasprivkey = 1;
1026 }
1027 if (pub_len > 0) {
1028 memcpy(key->pubkey, pubkey, pub_len);
1029 key->haspubkey = 1;
1030 }
1031 res = 1;
1032 err:
1033 return res;
1034 }
1035
xor_export(void * vkey,int select,OSSL_CALLBACK * param_cb,void * cbarg)1036 static int xor_export(void *vkey, int select, OSSL_CALLBACK *param_cb,
1037 void *cbarg)
1038 {
1039 XORKEY *key = vkey;
1040 OSSL_PARAM params[3], *p = params;
1041
1042 if (key == NULL || (select & OSSL_KEYMGMT_SELECT_KEYPAIR) == 0)
1043 return 0;
1044
1045 *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_PRIV_KEY,
1046 key->privkey,
1047 sizeof(key->privkey));
1048 *p++ = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_PUB_KEY,
1049 key->pubkey, sizeof(key->pubkey));
1050 *p++ = OSSL_PARAM_construct_end();
1051
1052 return param_cb(params, cbarg);
1053 }
1054
1055 static const OSSL_PARAM xor_key_types[] = {
1056 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PUB_KEY, NULL, 0),
1057 OSSL_PARAM_BN(OSSL_PKEY_PARAM_PRIV_KEY, NULL, 0),
1058 OSSL_PARAM_END
1059 };
1060
xor_import_types(int select)1061 static const OSSL_PARAM *xor_import_types(int select)
1062 {
1063 return (select & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0 ? xor_key_types : NULL;
1064 }
1065
xor_import_types_ex(void * provctx,int select)1066 static const OSSL_PARAM *xor_import_types_ex(void *provctx, int select)
1067 {
1068 if (provctx == NULL)
1069 return NULL;
1070
1071 return xor_import_types(select);
1072 }
1073
xor_export_types(int select)1074 static const OSSL_PARAM *xor_export_types(int select)
1075 {
1076 return (select & OSSL_KEYMGMT_SELECT_KEYPAIR) != 0 ? xor_key_types : NULL;
1077 }
1078
xor_export_types_ex(void * provctx,int select)1079 static const OSSL_PARAM *xor_export_types_ex(void *provctx, int select)
1080 {
1081 if (provctx == NULL)
1082 return NULL;
1083
1084 return xor_export_types(select);
1085 }
1086
xor_gen_cleanup(void * genctx)1087 static void xor_gen_cleanup(void *genctx)
1088 {
1089 OPENSSL_free(genctx);
1090 }
1091
1092 static const OSSL_DISPATCH xor_keymgmt_functions[] = {
1093 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))xor_newkey },
1094 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))xor_gen_init },
1095 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))xor_gen_set_params },
1096 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
1097 (void (*)(void))xor_gen_settable_params },
1098 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))xor_gen },
1099 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))xor_gen_cleanup },
1100 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*)(void))xor_get_params },
1101 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*)(void))xor_gettable_params },
1102 { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*)(void))xor_set_params },
1103 { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*)(void))xor_settable_params },
1104 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))xor_has },
1105 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))xor_dup },
1106 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))xor_freekey },
1107 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))xor_import },
1108 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))xor_import_types },
1109 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES_EX, (void (*)(void))xor_import_types_ex },
1110 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))xor_export },
1111 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))xor_export_types },
1112 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES_EX, (void (*)(void))xor_export_types_ex },
1113 OSSL_DISPATCH_END
1114 };
1115
1116 /* We're reusing most XOR keymgmt functions also for signature operations: */
xor_xorhmacsig_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)1117 static void *xor_xorhmacsig_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
1118 {
1119 XORKEY *k = xor_gen(genctx, osslcb, cbarg);
1120
1121 if (k == NULL)
1122 return NULL;
1123 k->tls_name = OPENSSL_strdup(XORSIGALG_NAME);
1124 if (k->tls_name == NULL) {
1125 xor_freekey(k);
1126 return NULL;
1127 }
1128 return k;
1129 }
1130
xor_xorhmacsha2sig_gen(void * genctx,OSSL_CALLBACK * osslcb,void * cbarg)1131 static void *xor_xorhmacsha2sig_gen(void *genctx, OSSL_CALLBACK *osslcb, void *cbarg)
1132 {
1133 XORKEY *k = xor_gen(genctx, osslcb, cbarg);
1134
1135 if (k == NULL)
1136 return NULL;
1137 k->tls_name = OPENSSL_strdup(XORSIGALG_HASH_NAME);
1138 if (k->tls_name == NULL) {
1139 xor_freekey(k);
1140 return NULL;
1141 }
1142 return k;
1143 }
1144
1145 static const OSSL_DISPATCH xor_xorhmacsig_keymgmt_functions[] = {
1146 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))xor_newkey },
1147 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))xor_gen_init },
1148 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))xor_gen_set_params },
1149 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
1150 (void (*)(void))xor_gen_settable_params },
1151 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))xor_xorhmacsig_gen },
1152 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))xor_gen_cleanup },
1153 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*)(void))xor_get_params },
1154 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*)(void))xor_gettable_params },
1155 { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*)(void))xor_set_params },
1156 { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*)(void))xor_settable_params },
1157 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))xor_has },
1158 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))xor_dup },
1159 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))xor_freekey },
1160 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))xor_import },
1161 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))xor_import_types },
1162 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))xor_export },
1163 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))xor_export_types },
1164 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))xor_load },
1165 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))xor_match },
1166 OSSL_DISPATCH_END
1167 };
1168
1169 static const OSSL_DISPATCH xor_xorhmacsha2sig_keymgmt_functions[] = {
1170 { OSSL_FUNC_KEYMGMT_NEW, (void (*)(void))xor_newkey },
1171 { OSSL_FUNC_KEYMGMT_GEN_INIT, (void (*)(void))xor_gen_init },
1172 { OSSL_FUNC_KEYMGMT_GEN_SET_PARAMS, (void (*)(void))xor_gen_set_params },
1173 { OSSL_FUNC_KEYMGMT_GEN_SETTABLE_PARAMS,
1174 (void (*)(void))xor_gen_settable_params },
1175 { OSSL_FUNC_KEYMGMT_GEN, (void (*)(void))xor_xorhmacsha2sig_gen },
1176 { OSSL_FUNC_KEYMGMT_GEN_CLEANUP, (void (*)(void))xor_gen_cleanup },
1177 { OSSL_FUNC_KEYMGMT_GET_PARAMS, (void (*)(void))xor_get_params },
1178 { OSSL_FUNC_KEYMGMT_GETTABLE_PARAMS, (void (*)(void))xor_gettable_params },
1179 { OSSL_FUNC_KEYMGMT_SET_PARAMS, (void (*)(void))xor_set_params },
1180 { OSSL_FUNC_KEYMGMT_SETTABLE_PARAMS, (void (*)(void))xor_settable_params },
1181 { OSSL_FUNC_KEYMGMT_HAS, (void (*)(void))xor_has },
1182 { OSSL_FUNC_KEYMGMT_DUP, (void (*)(void))xor_dup },
1183 { OSSL_FUNC_KEYMGMT_FREE, (void (*)(void))xor_freekey },
1184 { OSSL_FUNC_KEYMGMT_IMPORT, (void (*)(void))xor_import },
1185 { OSSL_FUNC_KEYMGMT_IMPORT_TYPES, (void (*)(void))xor_import_types },
1186 { OSSL_FUNC_KEYMGMT_EXPORT, (void (*)(void))xor_export },
1187 { OSSL_FUNC_KEYMGMT_EXPORT_TYPES, (void (*)(void))xor_export_types },
1188 { OSSL_FUNC_KEYMGMT_LOAD, (void (*)(void))xor_load },
1189 { OSSL_FUNC_KEYMGMT_MATCH, (void (*)(void))xor_match },
1190 OSSL_DISPATCH_END
1191 };
1192
1193 typedef enum {
1194 KEY_OP_PUBLIC,
1195 KEY_OP_PRIVATE,
1196 KEY_OP_KEYGEN
1197 } xor_key_op_t;
1198
1199 /* Re-create XORKEY from encoding(s): Same end-state as after key-gen */
xor_key_op(const X509_ALGOR * palg,const unsigned char * p,int plen,xor_key_op_t op,OSSL_LIB_CTX * libctx,const char * propq)1200 static XORKEY *xor_key_op(const X509_ALGOR *palg,
1201 const unsigned char *p, int plen,
1202 xor_key_op_t op,
1203 OSSL_LIB_CTX *libctx, const char *propq)
1204 {
1205 XORKEY *key = NULL;
1206 int nid = NID_undef;
1207
1208 if (palg != NULL) {
1209 int ptype;
1210
1211 /* Algorithm parameters must be absent */
1212 X509_ALGOR_get0(NULL, &ptype, NULL, palg);
1213 if (ptype != V_ASN1_UNDEF || palg->algorithm == NULL) {
1214 ERR_raise(ERR_LIB_USER, XORPROV_R_INVALID_ENCODING);
1215 return 0;
1216 }
1217 nid = OBJ_obj2nid(palg->algorithm);
1218 }
1219
1220 if (p == NULL || nid == EVP_PKEY_NONE || nid == NID_undef) {
1221 ERR_raise(ERR_LIB_USER, XORPROV_R_INVALID_ENCODING);
1222 return 0;
1223 }
1224
1225 key = xor_newkey(NULL);
1226 if (key == NULL) {
1227 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
1228 return 0;
1229 }
1230
1231 if (XOR_KEY_SIZE != plen) {
1232 ERR_raise(ERR_LIB_USER, XORPROV_R_INVALID_ENCODING);
1233 goto err;
1234 }
1235
1236 if (op == KEY_OP_PUBLIC) {
1237 memcpy(key->pubkey, p, plen);
1238 key->haspubkey = 1;
1239 } else {
1240 memcpy(key->privkey, p, plen);
1241 key->hasprivkey = 1;
1242 }
1243
1244 key->tls_name = OPENSSL_strdup(OBJ_nid2sn(nid));
1245 if (key->tls_name == NULL)
1246 goto err;
1247 return key;
1248
1249 err:
1250 xor_freekey(key);
1251 return NULL;
1252 }
1253
xor_key_from_x509pubkey(const X509_PUBKEY * xpk,OSSL_LIB_CTX * libctx,const char * propq)1254 static XORKEY *xor_key_from_x509pubkey(const X509_PUBKEY *xpk,
1255 OSSL_LIB_CTX *libctx, const char *propq)
1256 {
1257 const unsigned char *p;
1258 int plen;
1259 X509_ALGOR *palg;
1260
1261 if (!xpk || (!X509_PUBKEY_get0_param(NULL, &p, &plen, &palg, xpk))) {
1262 return NULL;
1263 }
1264 return xor_key_op(palg, p, plen, KEY_OP_PUBLIC, libctx, propq);
1265 }
1266
xor_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO * p8inf,OSSL_LIB_CTX * libctx,const char * propq)1267 static XORKEY *xor_key_from_pkcs8(const PKCS8_PRIV_KEY_INFO *p8inf,
1268 OSSL_LIB_CTX *libctx, const char *propq)
1269 {
1270 XORKEY *xork = NULL;
1271 const unsigned char *p;
1272 int plen;
1273 ASN1_OCTET_STRING *oct = NULL;
1274 const X509_ALGOR *palg;
1275
1276 if (!PKCS8_pkey_get0(NULL, &p, &plen, &palg, p8inf))
1277 return 0;
1278
1279 oct = d2i_ASN1_OCTET_STRING(NULL, &p, plen);
1280 if (oct == NULL) {
1281 p = NULL;
1282 plen = 0;
1283 } else {
1284 p = ASN1_STRING_get0_data(oct);
1285 plen = ASN1_STRING_length(oct);
1286 }
1287
1288 xork = xor_key_op(palg, p, plen, KEY_OP_PRIVATE,
1289 libctx, propq);
1290 ASN1_OCTET_STRING_free(oct);
1291 return xork;
1292 }
1293
1294 static const OSSL_ALGORITHM tls_prov_keymgmt[] = {
1295 /*
1296 * Obviously this is not FIPS approved, but in order to test in conjunction
1297 * with the FIPS provider we pretend that it is.
1298 */
1299 { "XOR", "provider=tls-provider,fips=yes",
1300 xor_keymgmt_functions },
1301 { XORSIGALG_NAME, "provider=tls-provider,fips=yes",
1302 xor_xorhmacsig_keymgmt_functions },
1303 { XORSIGALG_HASH_NAME,
1304 "provider=tls-provider,fips=yes",
1305 xor_xorhmacsha2sig_keymgmt_functions },
1306 { NULL, NULL, NULL }
1307 };
1308
1309 struct key2any_ctx_st {
1310 PROV_XOR_CTX *provctx;
1311
1312 /* Set to 0 if parameters should not be saved (dsa only) */
1313 int save_parameters;
1314
1315 /* Set to 1 if intending to encrypt/decrypt, otherwise 0 */
1316 int cipher_intent;
1317
1318 EVP_CIPHER *cipher;
1319
1320 OSSL_PASSPHRASE_CALLBACK *pwcb;
1321 void *pwcbarg;
1322 };
1323
1324 typedef int check_key_type_fn(const void *key, int nid);
1325 typedef int key_to_paramstring_fn(const void *key, int nid, int save,
1326 void **str, int *strtype);
1327 typedef int key_to_der_fn(BIO *out, const void *key,
1328 int key_nid, const char *pemname,
1329 key_to_paramstring_fn *p2s, i2d_of_void *k2d,
1330 struct key2any_ctx_st *ctx);
1331 typedef int write_bio_of_void_fn(BIO *bp, const void *x);
1332
1333 /* Free the blob allocated during key_to_paramstring_fn */
free_asn1_data(int type,void * data)1334 static void free_asn1_data(int type, void *data)
1335 {
1336 switch (type) {
1337 case V_ASN1_OBJECT:
1338 ASN1_OBJECT_free(data);
1339 break;
1340 case V_ASN1_SEQUENCE:
1341 ASN1_STRING_free(data);
1342 break;
1343 }
1344 }
1345
key_to_p8info(const void * key,int key_nid,void * params,int params_type,i2d_of_void * k2d)1346 static PKCS8_PRIV_KEY_INFO *key_to_p8info(const void *key, int key_nid,
1347 void *params, int params_type,
1348 i2d_of_void *k2d)
1349 {
1350 /* der, derlen store the key DER output and its length */
1351 unsigned char *der = NULL;
1352 int derlen;
1353 /* The final PKCS#8 info */
1354 PKCS8_PRIV_KEY_INFO *p8info = NULL;
1355
1356 if ((p8info = PKCS8_PRIV_KEY_INFO_new()) == NULL
1357 || (derlen = k2d(key, &der)) <= 0
1358 || !PKCS8_pkey_set0(p8info, OBJ_nid2obj(key_nid), 0,
1359 V_ASN1_UNDEF, NULL,
1360 der, derlen)) {
1361 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
1362 PKCS8_PRIV_KEY_INFO_free(p8info);
1363 OPENSSL_free(der);
1364 p8info = NULL;
1365 }
1366
1367 return p8info;
1368 }
1369
p8info_to_encp8(PKCS8_PRIV_KEY_INFO * p8info,struct key2any_ctx_st * ctx)1370 static X509_SIG *p8info_to_encp8(PKCS8_PRIV_KEY_INFO *p8info,
1371 struct key2any_ctx_st *ctx)
1372 {
1373 X509_SIG *p8 = NULL;
1374 char kstr[PEM_BUFSIZE];
1375 size_t klen = 0;
1376 OSSL_LIB_CTX *libctx = PROV_XOR_LIBCTX_OF(ctx->provctx);
1377
1378 if (ctx->cipher == NULL || ctx->pwcb == NULL)
1379 return NULL;
1380
1381 if (!ctx->pwcb(kstr, PEM_BUFSIZE, &klen, NULL, ctx->pwcbarg)) {
1382 ERR_raise(ERR_LIB_USER, PROV_R_UNABLE_TO_GET_PASSPHRASE);
1383 return NULL;
1384 }
1385 /* First argument == -1 means "standard" */
1386 p8 = PKCS8_encrypt_ex(-1, ctx->cipher, kstr, klen, NULL, 0, 0, p8info, libctx, NULL);
1387 OPENSSL_cleanse(kstr, klen);
1388 return p8;
1389 }
1390
key_to_encp8(const void * key,int key_nid,void * params,int params_type,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1391 static X509_SIG *key_to_encp8(const void *key, int key_nid,
1392 void *params, int params_type,
1393 i2d_of_void *k2d, struct key2any_ctx_st *ctx)
1394 {
1395 PKCS8_PRIV_KEY_INFO *p8info = key_to_p8info(key, key_nid, params, params_type, k2d);
1396 X509_SIG *p8 = NULL;
1397
1398 if (p8info == NULL) {
1399 free_asn1_data(params_type, params);
1400 } else {
1401 p8 = p8info_to_encp8(p8info, ctx);
1402 PKCS8_PRIV_KEY_INFO_free(p8info);
1403 }
1404 return p8;
1405 }
1406
xorx_key_to_pubkey(const void * key,int key_nid,void * params,int params_type,i2d_of_void k2d)1407 static X509_PUBKEY *xorx_key_to_pubkey(const void *key, int key_nid,
1408 void *params, int params_type,
1409 i2d_of_void k2d)
1410 {
1411 /* der, derlen store the key DER output and its length */
1412 unsigned char *der = NULL;
1413 int derlen;
1414 /* The final X509_PUBKEY */
1415 X509_PUBKEY *xpk = NULL;
1416
1417 if ((xpk = X509_PUBKEY_new()) == NULL
1418 || (derlen = k2d(key, &der)) <= 0
1419 || !X509_PUBKEY_set0_param(xpk, OBJ_nid2obj(key_nid),
1420 V_ASN1_UNDEF, NULL,
1421 der, derlen)) {
1422 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
1423 X509_PUBKEY_free(xpk);
1424 OPENSSL_free(der);
1425 xpk = NULL;
1426 }
1427
1428 return xpk;
1429 }
1430
1431 /*
1432 * key_to_epki_* produce encoded output with the private key data in a
1433 * EncryptedPrivateKeyInfo structure (defined by PKCS#8). They require
1434 * that there's an intent to encrypt, anything else is an error.
1435 *
1436 * key_to_pki_* primarily produce encoded output with the private key data
1437 * in a PrivateKeyInfo structure (also defined by PKCS#8). However, if
1438 * there is an intent to encrypt the data, the corresponding key_to_epki_*
1439 * function is used instead.
1440 *
1441 * key_to_spki_* produce encoded output with the public key data in an
1442 * X.509 SubjectPublicKeyInfo.
1443 *
1444 * Key parameters don't have any defined envelopment of this kind, but are
1445 * included in some manner in the output from the functions described above,
1446 * either in the AlgorithmIdentifier's parameter field, or as part of the
1447 * key data itself.
1448 */
1449
key_to_epki_der_priv_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1450 static int key_to_epki_der_priv_bio(BIO *out, const void *key,
1451 int key_nid,
1452 ossl_unused const char *pemname,
1453 key_to_paramstring_fn *p2s,
1454 i2d_of_void *k2d,
1455 struct key2any_ctx_st *ctx)
1456 {
1457 int ret = 0;
1458 void *str = NULL;
1459 int strtype = V_ASN1_UNDEF;
1460 X509_SIG *p8;
1461
1462 if (!ctx->cipher_intent)
1463 return 0;
1464
1465 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1466 return 0;
1467
1468 p8 = key_to_encp8(key, key_nid, str, strtype, k2d, ctx);
1469 if (p8 != NULL)
1470 ret = i2d_PKCS8_bio(out, p8);
1471
1472 X509_SIG_free(p8);
1473
1474 return ret;
1475 }
1476
key_to_epki_pem_priv_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1477 static int key_to_epki_pem_priv_bio(BIO *out, const void *key,
1478 int key_nid,
1479 ossl_unused const char *pemname,
1480 key_to_paramstring_fn *p2s,
1481 i2d_of_void *k2d,
1482 struct key2any_ctx_st *ctx)
1483 {
1484 int ret = 0;
1485 void *str = NULL;
1486 int strtype = V_ASN1_UNDEF;
1487 X509_SIG *p8;
1488
1489 if (!ctx->cipher_intent)
1490 return 0;
1491
1492 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1493 return 0;
1494
1495 p8 = key_to_encp8(key, key_nid, str, strtype, k2d, ctx);
1496 if (p8 != NULL)
1497 ret = PEM_write_bio_PKCS8(out, p8);
1498
1499 X509_SIG_free(p8);
1500
1501 return ret;
1502 }
1503
key_to_pki_der_priv_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1504 static int key_to_pki_der_priv_bio(BIO *out, const void *key,
1505 int key_nid,
1506 ossl_unused const char *pemname,
1507 key_to_paramstring_fn *p2s,
1508 i2d_of_void *k2d,
1509 struct key2any_ctx_st *ctx)
1510 {
1511 int ret = 0;
1512 void *str = NULL;
1513 int strtype = V_ASN1_UNDEF;
1514 PKCS8_PRIV_KEY_INFO *p8info;
1515
1516 if (ctx->cipher_intent)
1517 return key_to_epki_der_priv_bio(out, key, key_nid, pemname,
1518 p2s, k2d, ctx);
1519
1520 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1521 return 0;
1522
1523 p8info = key_to_p8info(key, key_nid, str, strtype, k2d);
1524
1525 if (p8info != NULL)
1526 ret = i2d_PKCS8_PRIV_KEY_INFO_bio(out, p8info);
1527 else
1528 free_asn1_data(strtype, str);
1529
1530 PKCS8_PRIV_KEY_INFO_free(p8info);
1531
1532 return ret;
1533 }
1534
key_to_pki_pem_priv_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1535 static int key_to_pki_pem_priv_bio(BIO *out, const void *key,
1536 int key_nid,
1537 ossl_unused const char *pemname,
1538 key_to_paramstring_fn *p2s,
1539 i2d_of_void *k2d,
1540 struct key2any_ctx_st *ctx)
1541 {
1542 int ret = 0;
1543 void *str = NULL;
1544 int strtype = V_ASN1_UNDEF;
1545 PKCS8_PRIV_KEY_INFO *p8info;
1546
1547 if (ctx->cipher_intent)
1548 return key_to_epki_pem_priv_bio(out, key, key_nid, pemname,
1549 p2s, k2d, ctx);
1550
1551 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1552 return 0;
1553
1554 p8info = key_to_p8info(key, key_nid, str, strtype, k2d);
1555
1556 if (p8info != NULL)
1557 ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(out, p8info);
1558 else
1559 free_asn1_data(strtype, str);
1560
1561 PKCS8_PRIV_KEY_INFO_free(p8info);
1562
1563 return ret;
1564 }
1565
key_to_spki_der_pub_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1566 static int key_to_spki_der_pub_bio(BIO *out, const void *key,
1567 int key_nid,
1568 ossl_unused const char *pemname,
1569 key_to_paramstring_fn *p2s,
1570 i2d_of_void *k2d,
1571 struct key2any_ctx_st *ctx)
1572 {
1573 int ret = 0;
1574 X509_PUBKEY *xpk = NULL;
1575 void *str = NULL;
1576 int strtype = V_ASN1_UNDEF;
1577
1578 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1579 return 0;
1580
1581 xpk = xorx_key_to_pubkey(key, key_nid, str, strtype, k2d);
1582
1583 if (xpk != NULL)
1584 ret = i2d_X509_PUBKEY_bio(out, xpk);
1585
1586 X509_PUBKEY_free(xpk);
1587 return ret;
1588 }
1589
key_to_spki_pem_pub_bio(BIO * out,const void * key,int key_nid,ossl_unused const char * pemname,key_to_paramstring_fn * p2s,i2d_of_void * k2d,struct key2any_ctx_st * ctx)1590 static int key_to_spki_pem_pub_bio(BIO *out, const void *key,
1591 int key_nid,
1592 ossl_unused const char *pemname,
1593 key_to_paramstring_fn *p2s,
1594 i2d_of_void *k2d,
1595 struct key2any_ctx_st *ctx)
1596 {
1597 int ret = 0;
1598 X509_PUBKEY *xpk = NULL;
1599 void *str = NULL;
1600 int strtype = V_ASN1_UNDEF;
1601
1602 if (p2s != NULL && !p2s(key, key_nid, ctx->save_parameters, &str, &strtype))
1603 return 0;
1604
1605 xpk = xorx_key_to_pubkey(key, key_nid, str, strtype, k2d);
1606
1607 if (xpk != NULL)
1608 ret = PEM_write_bio_X509_PUBKEY(out, xpk);
1609 else
1610 free_asn1_data(strtype, str);
1611
1612 /* Also frees |str| */
1613 X509_PUBKEY_free(xpk);
1614 return ret;
1615 }
1616
1617 /* ---------------------------------------------------------------------- */
1618
prepare_xorx_params(const void * xorxkey,int nid,int save,void ** pstr,int * pstrtype)1619 static int prepare_xorx_params(const void *xorxkey, int nid, int save,
1620 void **pstr, int *pstrtype)
1621 {
1622 ASN1_OBJECT *params = NULL;
1623 XORKEY *k = (XORKEY *)xorxkey;
1624
1625 if (k->tls_name && OBJ_sn2nid(k->tls_name) != nid) {
1626 ERR_raise(ERR_LIB_USER, XORPROV_R_INVALID_KEY);
1627 return 0;
1628 }
1629
1630 if (nid == NID_undef) {
1631 ERR_raise(ERR_LIB_USER, XORPROV_R_MISSING_OID);
1632 return 0;
1633 }
1634
1635 params = OBJ_nid2obj(nid);
1636
1637 if (params == NULL || OBJ_length(params) == 0) {
1638 /* unexpected error */
1639 ERR_raise(ERR_LIB_USER, XORPROV_R_MISSING_OID);
1640 ASN1_OBJECT_free(params);
1641 return 0;
1642 }
1643 *pstr = params;
1644 *pstrtype = V_ASN1_OBJECT;
1645 return 1;
1646 }
1647
xorx_spki_pub_to_der(const void * vecxkey,unsigned char ** pder)1648 static int xorx_spki_pub_to_der(const void *vecxkey, unsigned char **pder)
1649 {
1650 const XORKEY *xorxkey = vecxkey;
1651 unsigned char *keyblob;
1652 int retlen;
1653
1654 if (xorxkey == NULL) {
1655 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_NULL_PARAMETER);
1656 return 0;
1657 }
1658
1659 keyblob = OPENSSL_memdup(xorxkey->pubkey, retlen = XOR_KEY_SIZE);
1660 if (keyblob == NULL) {
1661 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
1662 return 0;
1663 }
1664
1665 *pder = keyblob;
1666 return retlen;
1667 }
1668
xorx_pki_priv_to_der(const void * vecxkey,unsigned char ** pder)1669 static int xorx_pki_priv_to_der(const void *vecxkey, unsigned char **pder)
1670 {
1671 XORKEY *xorxkey = (XORKEY *)vecxkey;
1672 unsigned char *buf = NULL;
1673 ASN1_OCTET_STRING oct;
1674 int keybloblen;
1675
1676 if (xorxkey == NULL) {
1677 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_NULL_PARAMETER);
1678 return 0;
1679 }
1680
1681 buf = OPENSSL_secure_malloc(XOR_KEY_SIZE);
1682 memcpy(buf, xorxkey->privkey, XOR_KEY_SIZE);
1683
1684 oct.data = buf;
1685 oct.length = XOR_KEY_SIZE;
1686 oct.flags = 0;
1687
1688 keybloblen = i2d_ASN1_OCTET_STRING(&oct, pder);
1689 if (keybloblen < 0) {
1690 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
1691 keybloblen = 0;
1692 }
1693
1694 OPENSSL_secure_clear_free(buf, XOR_KEY_SIZE);
1695 return keybloblen;
1696 }
1697
1698 #define xorx_epki_priv_to_der xorx_pki_priv_to_der
1699
1700 /*
1701 * XORX only has PKCS#8 / SubjectPublicKeyInfo
1702 * representation, so we don't define xorx_type_specific_[priv,pub,params]_to_der.
1703 */
1704
1705 #define xorx_check_key_type NULL
1706
1707 #define xorhmacsig_evp_type 0
1708 #define xorhmacsig_input_type XORSIGALG_NAME
1709 #define xorhmacsig_pem_type XORSIGALG_NAME
1710 #define xorhmacsha2sig_evp_type 0
1711 #define xorhmacsha2sig_input_type XORSIGALG_HASH_NAME
1712 #define xorhmacsha2sig_pem_type XORSIGALG_HASH_NAME
1713
1714 /* ---------------------------------------------------------------------- */
1715
1716 static OSSL_FUNC_decoder_newctx_fn key2any_newctx;
1717 static OSSL_FUNC_decoder_freectx_fn key2any_freectx;
1718
key2any_newctx(void * provctx)1719 static void *key2any_newctx(void *provctx)
1720 {
1721 struct key2any_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
1722
1723 if (ctx != NULL) {
1724 ctx->provctx = provctx;
1725 ctx->save_parameters = 1;
1726 }
1727
1728 return ctx;
1729 }
1730
key2any_freectx(void * vctx)1731 static void key2any_freectx(void *vctx)
1732 {
1733 struct key2any_ctx_st *ctx = vctx;
1734
1735 EVP_CIPHER_free(ctx->cipher);
1736 OPENSSL_free(ctx);
1737 }
1738
key2any_settable_ctx_params(ossl_unused void * provctx)1739 static const OSSL_PARAM *key2any_settable_ctx_params(ossl_unused void *provctx)
1740 {
1741 static const OSSL_PARAM settables[] = {
1742 OSSL_PARAM_utf8_string(OSSL_ENCODER_PARAM_CIPHER, NULL, 0),
1743 OSSL_PARAM_utf8_string(OSSL_ENCODER_PARAM_PROPERTIES, NULL, 0),
1744 OSSL_PARAM_END,
1745 };
1746
1747 return settables;
1748 }
1749
key2any_set_ctx_params(void * vctx,const OSSL_PARAM params[])1750 static int key2any_set_ctx_params(void *vctx, const OSSL_PARAM params[])
1751 {
1752 struct key2any_ctx_st *ctx = vctx;
1753 OSSL_LIB_CTX *libctx = PROV_XOR_LIBCTX_OF(ctx->provctx);
1754 const OSSL_PARAM *cipherp = OSSL_PARAM_locate_const(params, OSSL_ENCODER_PARAM_CIPHER);
1755 const OSSL_PARAM *propsp = OSSL_PARAM_locate_const(params, OSSL_ENCODER_PARAM_PROPERTIES);
1756 const OSSL_PARAM *save_paramsp = OSSL_PARAM_locate_const(params, OSSL_ENCODER_PARAM_SAVE_PARAMETERS);
1757
1758 if (cipherp != NULL) {
1759 const char *ciphername = NULL;
1760 const char *props = NULL;
1761
1762 if (!OSSL_PARAM_get_utf8_string_ptr(cipherp, &ciphername))
1763 return 0;
1764 if (propsp != NULL && !OSSL_PARAM_get_utf8_string_ptr(propsp, &props))
1765 return 0;
1766
1767 EVP_CIPHER_free(ctx->cipher);
1768 ctx->cipher = NULL;
1769 ctx->cipher_intent = ciphername != NULL;
1770 if (ciphername != NULL
1771 && ((ctx->cipher = EVP_CIPHER_fetch(libctx, ciphername, props)) == NULL)) {
1772 return 0;
1773 }
1774 }
1775
1776 if (save_paramsp != NULL) {
1777 if (!OSSL_PARAM_get_int(save_paramsp, &ctx->save_parameters)) {
1778 return 0;
1779 }
1780 }
1781 return 1;
1782 }
1783
key2any_check_selection(int selection,int selection_mask)1784 static int key2any_check_selection(int selection, int selection_mask)
1785 {
1786 /*
1787 * The selections are kinda sorta "levels", i.e. each selection given
1788 * here is assumed to include those following.
1789 */
1790 int checks[] = {
1791 OSSL_KEYMGMT_SELECT_PRIVATE_KEY,
1792 OSSL_KEYMGMT_SELECT_PUBLIC_KEY,
1793 OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
1794 };
1795 size_t i;
1796
1797 /* The decoder implementations made here support guessing */
1798 if (selection == 0)
1799 return 1;
1800
1801 for (i = 0; i < OSSL_NELEM(checks); i++) {
1802 int check1 = (selection & checks[i]) != 0;
1803 int check2 = (selection_mask & checks[i]) != 0;
1804
1805 /*
1806 * If the caller asked for the currently checked bit(s), return
1807 * whether the decoder description says it's supported.
1808 */
1809 if (check1)
1810 return check2;
1811 }
1812
1813 /* This should be dead code, but just to be safe... */
1814 return 0;
1815 }
1816
key2any_encode(struct key2any_ctx_st * ctx,OSSL_CORE_BIO * cout,const void * key,const char * typestr,const char * pemname,key_to_der_fn * writer,OSSL_PASSPHRASE_CALLBACK * pwcb,void * pwcbarg,key_to_paramstring_fn * key2paramstring,i2d_of_void * key2der)1817 static int key2any_encode(struct key2any_ctx_st *ctx, OSSL_CORE_BIO *cout,
1818 const void *key, const char *typestr, const char *pemname,
1819 key_to_der_fn *writer,
1820 OSSL_PASSPHRASE_CALLBACK *pwcb, void *pwcbarg,
1821 key_to_paramstring_fn *key2paramstring,
1822 i2d_of_void *key2der)
1823 {
1824 int ret = 0;
1825 int type = OBJ_sn2nid(typestr);
1826
1827 if (key == NULL || type <= 0) {
1828 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_NULL_PARAMETER);
1829 } else if (writer != NULL) {
1830 BIO *out = BIO_new_from_core_bio(ctx->provctx->libctx, cout);
1831
1832 if (out != NULL) {
1833 ctx->pwcb = pwcb;
1834 ctx->pwcbarg = pwcbarg;
1835
1836 ret = writer(out, key, type, pemname, key2paramstring, key2der, ctx);
1837 }
1838
1839 BIO_free(out);
1840 } else {
1841 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_INVALID_ARGUMENT);
1842 }
1843 return ret;
1844 }
1845
1846 #define DO_ENC_PRIVATE_KEY_selection_mask OSSL_KEYMGMT_SELECT_PRIVATE_KEY
1847 #define DO_ENC_PRIVATE_KEY(impl, type, kind, output) \
1848 if ((selection & DO_ENC_PRIVATE_KEY_selection_mask) != 0) \
1849 return key2any_encode(ctx, cout, key, impl##_pem_type, \
1850 impl##_pem_type " PRIVATE KEY", \
1851 key_to_##kind##_##output##_priv_bio, \
1852 cb, cbarg, prepare_##type##_params, \
1853 type##_##kind##_priv_to_der);
1854
1855 #define DO_ENC_PUBLIC_KEY_selection_mask OSSL_KEYMGMT_SELECT_PUBLIC_KEY
1856 #define DO_ENC_PUBLIC_KEY(impl, type, kind, output) \
1857 if ((selection & DO_ENC_PUBLIC_KEY_selection_mask) != 0) \
1858 return key2any_encode(ctx, cout, key, impl##_pem_type, \
1859 impl##_pem_type " PUBLIC KEY", \
1860 key_to_##kind##_##output##_pub_bio, \
1861 cb, cbarg, prepare_##type##_params, \
1862 type##_##kind##_pub_to_der);
1863
1864 #define DO_ENC_PARAMETERS_selection_mask OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
1865 #define DO_ENC_PARAMETERS(impl, type, kind, output) \
1866 if ((selection & DO_ENC_PARAMETERS_selection_mask) != 0) \
1867 return key2any_encode(ctx, cout, key, impl##_pem_type, \
1868 impl##_pem_type " PARAMETERS", \
1869 key_to_##kind##_##output##_param_bio, \
1870 NULL, NULL, NULL, \
1871 type##_##kind##_params_to_der);
1872
1873 /*-
1874 * Implement the kinds of output structure that can be produced. They are
1875 * referred to by name, and for each name, the following macros are defined
1876 * (braces not included):
1877 *
1878 * DO_{kind}_selection_mask
1879 *
1880 * A mask of selection bits that must not be zero. This is used as a
1881 * selection criterion for each implementation.
1882 * This mask must never be zero.
1883 *
1884 * DO_{kind}
1885 *
1886 * The performing macro. It must use the DO_ macros defined above,
1887 * always in this order:
1888 *
1889 * - DO_PRIVATE_KEY
1890 * - DO_PUBLIC_KEY
1891 * - DO_PARAMETERS
1892 *
1893 * Any of those may be omitted, but the relative order must still be
1894 * the same.
1895 */
1896
1897 /*
1898 * PKCS#8 defines two structures for private keys only:
1899 * - PrivateKeyInfo (raw unencrypted form)
1900 * - EncryptedPrivateKeyInfo (encrypted wrapping)
1901 *
1902 * To allow a certain amount of flexibility, we allow the routines
1903 * for PrivateKeyInfo to also produce EncryptedPrivateKeyInfo if a
1904 * passphrase callback has been passed to them.
1905 */
1906 #define DO_ENC_PrivateKeyInfo_selection_mask DO_ENC_PRIVATE_KEY_selection_mask
1907 #define DO_ENC_PrivateKeyInfo(impl, type, output) \
1908 DO_ENC_PRIVATE_KEY(impl, type, pki, output)
1909
1910 #define DO_ENC_EncryptedPrivateKeyInfo_selection_mask DO_ENC_PRIVATE_KEY_selection_mask
1911 #define DO_ENC_EncryptedPrivateKeyInfo(impl, type, output) \
1912 DO_ENC_PRIVATE_KEY(impl, type, epki, output)
1913
1914 /* SubjectPublicKeyInfo is a structure for public keys only */
1915 #define DO_ENC_SubjectPublicKeyInfo_selection_mask DO_ENC_PUBLIC_KEY_selection_mask
1916 #define DO_ENC_SubjectPublicKeyInfo(impl, type, output) \
1917 DO_ENC_PUBLIC_KEY(impl, type, spki, output)
1918
1919 /*
1920 * MAKE_ENCODER is the single driver for creating OSSL_DISPATCH tables.
1921 * It takes the following arguments:
1922 *
1923 * impl This is the key type name that's being implemented.
1924 * type This is the type name for the set of functions that implement
1925 * the key type. For example, ed25519, ed448, x25519 and x448
1926 * are all implemented with the exact same set of functions.
1927 * kind What kind of support to implement. These translate into
1928 * the DO_##kind macros above.
1929 * output The output type to implement. may be der or pem.
1930 *
1931 * The resulting OSSL_DISPATCH array gets the following name (expressed in
1932 * C preprocessor terms) from those arguments:
1933 *
1934 * xor_##impl##_to_##kind##_##output##_encoder_functions
1935 */
1936 #define MAKE_ENCODER(impl, type, kind, output) \
1937 static OSSL_FUNC_encoder_import_object_fn \
1938 impl##_to_##kind##_##output##_import_object; \
1939 static OSSL_FUNC_encoder_free_object_fn \
1940 impl##_to_##kind##_##output##_free_object; \
1941 static OSSL_FUNC_encoder_encode_fn \
1942 impl##_to_##kind##_##output##_encode; \
1943 \
1944 static void * \
1945 impl##_to_##kind##_##output##_import_object(void *vctx, int selection, \
1946 const OSSL_PARAM params[]) \
1947 { \
1948 struct key2any_ctx_st *ctx = vctx; \
1949 \
1950 return xor_prov_import_key(xor_##impl##_keymgmt_functions, \
1951 ctx->provctx, selection, params); \
1952 } \
1953 static void impl##_to_##kind##_##output##_free_object(void *key) \
1954 { \
1955 xor_prov_free_key(xor_##impl##_keymgmt_functions, key); \
1956 } \
1957 static int impl##_to_##kind##_##output##_does_selection(void *ctx, \
1958 int selection) \
1959 { \
1960 return key2any_check_selection(selection, \
1961 DO_ENC_##kind##_selection_mask); \
1962 } \
1963 static int \
1964 impl##_to_##kind##_##output##_encode(void *ctx, OSSL_CORE_BIO *cout, \
1965 const void *key, \
1966 const OSSL_PARAM key_abstract[], \
1967 int selection, \
1968 OSSL_PASSPHRASE_CALLBACK *cb, \
1969 void *cbarg) \
1970 { \
1971 /* We don't deal with abstract objects */ \
1972 if (key_abstract != NULL) { \
1973 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_INVALID_ARGUMENT); \
1974 return 0; \
1975 } \
1976 DO_ENC_##kind(impl, type, output) \
1977 \
1978 ERR_raise(ERR_LIB_USER, ERR_R_PASSED_INVALID_ARGUMENT); \
1979 return 0; \
1980 } \
1981 static const OSSL_DISPATCH \
1982 xor_##impl##_to_##kind##_##output##_encoder_functions[] \
1983 = { \
1984 { OSSL_FUNC_ENCODER_NEWCTX, \
1985 (void (*)(void))key2any_newctx }, \
1986 { OSSL_FUNC_ENCODER_FREECTX, \
1987 (void (*)(void))key2any_freectx }, \
1988 { OSSL_FUNC_ENCODER_SETTABLE_CTX_PARAMS, \
1989 (void (*)(void))key2any_settable_ctx_params }, \
1990 { OSSL_FUNC_ENCODER_SET_CTX_PARAMS, \
1991 (void (*)(void))key2any_set_ctx_params }, \
1992 { OSSL_FUNC_ENCODER_DOES_SELECTION, \
1993 (void (*)(void))impl##_to_##kind##_##output##_does_selection }, \
1994 { OSSL_FUNC_ENCODER_IMPORT_OBJECT, \
1995 (void (*)(void))impl##_to_##kind##_##output##_import_object }, \
1996 { OSSL_FUNC_ENCODER_FREE_OBJECT, \
1997 (void (*)(void))impl##_to_##kind##_##output##_free_object }, \
1998 { OSSL_FUNC_ENCODER_ENCODE, \
1999 (void (*)(void))impl##_to_##kind##_##output##_encode }, \
2000 OSSL_DISPATCH_END \
2001 }
2002
2003 /*
2004 * Replacements for i2d_{TYPE}PrivateKey, i2d_{TYPE}PublicKey,
2005 * i2d_{TYPE}params, as they exist.
2006 */
2007
2008 /*
2009 * PKCS#8 and SubjectPublicKeyInfo support. This may duplicate some of the
2010 * implementations specified above, but are more specific.
2011 * The SubjectPublicKeyInfo implementations also replace the
2012 * PEM_write_bio_{TYPE}_PUBKEY functions.
2013 * For PEM, these are expected to be used by PEM_write_bio_PrivateKey(),
2014 * PEM_write_bio_PUBKEY() and PEM_write_bio_Parameters().
2015 */
2016
2017 MAKE_ENCODER(xorhmacsig, xorx, EncryptedPrivateKeyInfo, der);
2018 MAKE_ENCODER(xorhmacsig, xorx, EncryptedPrivateKeyInfo, pem);
2019 MAKE_ENCODER(xorhmacsig, xorx, PrivateKeyInfo, der);
2020 MAKE_ENCODER(xorhmacsig, xorx, PrivateKeyInfo, pem);
2021 MAKE_ENCODER(xorhmacsig, xorx, SubjectPublicKeyInfo, der);
2022 MAKE_ENCODER(xorhmacsig, xorx, SubjectPublicKeyInfo, pem);
2023 MAKE_ENCODER(xorhmacsha2sig, xorx, EncryptedPrivateKeyInfo, der);
2024 MAKE_ENCODER(xorhmacsha2sig, xorx, EncryptedPrivateKeyInfo, pem);
2025 MAKE_ENCODER(xorhmacsha2sig, xorx, PrivateKeyInfo, der);
2026 MAKE_ENCODER(xorhmacsha2sig, xorx, PrivateKeyInfo, pem);
2027 MAKE_ENCODER(xorhmacsha2sig, xorx, SubjectPublicKeyInfo, der);
2028 MAKE_ENCODER(xorhmacsha2sig, xorx, SubjectPublicKeyInfo, pem);
2029
2030 static const OSSL_ALGORITHM tls_prov_encoder[] = {
2031 #define ENCODER_PROVIDER "tls-provider"
2032 #ifndef ENCODER_PROVIDER
2033 #error Macro ENCODER_PROVIDER undefined
2034 #endif
2035
2036 #define ENCODER_STRUCTURE_PKCS8 "pkcs8"
2037 #define ENCODER_STRUCTURE_SubjectPublicKeyInfo "SubjectPublicKeyInfo"
2038 #define ENCODER_STRUCTURE_PrivateKeyInfo "PrivateKeyInfo"
2039 #define ENCODER_STRUCTURE_EncryptedPrivateKeyInfo "EncryptedPrivateKeyInfo"
2040 #define ENCODER_STRUCTURE_PKCS1 "pkcs1"
2041 #define ENCODER_STRUCTURE_PKCS3 "pkcs3"
2042
2043 /* Arguments are prefixed with '_' to avoid build breaks on certain platforms */
2044 /*
2045 * Obviously this is not FIPS approved, but in order to test in conjunction
2046 * with the FIPS provider we pretend that it is.
2047 */
2048 #define ENCODER_TEXT(_name, _sym) \
2049 { _name, \
2050 "provider=" ENCODER_PROVIDER ",fips=yes,output=text", \
2051 (xor_##_sym##_to_text_encoder_functions) }
2052 #define ENCODER(_name, _sym, _fips, _output) \
2053 { _name, \
2054 "provider=" ENCODER_PROVIDER ",fips=yes,output=" #_output, \
2055 (xor_##_sym##_to_##_output##_encoder_functions) }
2056
2057 #define ENCODER_w_structure(_name, _sym, _output, _structure) \
2058 { _name, \
2059 "provider=" ENCODER_PROVIDER ",fips=yes,output=" #_output \
2060 ",structure=" ENCODER_STRUCTURE_##_structure, \
2061 (xor_##_sym##_to_##_structure##_##_output##_encoder_functions) }
2062
2063 /*
2064 * Entries for human text "encoders"
2065 */
2066
2067 /*
2068 * Entries for PKCS#8 and SubjectPublicKeyInfo.
2069 * The "der" ones are added convenience for any user that wants to use
2070 * OSSL_ENCODER directly.
2071 * The "pem" ones also support PEM_write_bio_PrivateKey() and
2072 * PEM_write_bio_PUBKEY().
2073 */
2074
2075 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, der, PrivateKeyInfo),
2076 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, pem, PrivateKeyInfo),
2077 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, der, EncryptedPrivateKeyInfo),
2078 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, pem, EncryptedPrivateKeyInfo),
2079 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, der, SubjectPublicKeyInfo),
2080 ENCODER_w_structure(XORSIGALG_NAME, xorhmacsig, pem, SubjectPublicKeyInfo),
2081 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2082 der, PrivateKeyInfo),
2083 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2084 pem, PrivateKeyInfo),
2085 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2086 der, EncryptedPrivateKeyInfo),
2087 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2088 pem, EncryptedPrivateKeyInfo),
2089 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2090 der, SubjectPublicKeyInfo),
2091 ENCODER_w_structure(XORSIGALG_HASH_NAME, xorhmacsha2sig,
2092 pem, SubjectPublicKeyInfo),
2093 #undef ENCODER_PROVIDER
2094 { NULL, NULL, NULL }
2095 };
2096
2097 struct der2key_ctx_st; /* Forward declaration */
2098 typedef int check_key_fn(void *, struct der2key_ctx_st *ctx);
2099 typedef void adjust_key_fn(void *, struct der2key_ctx_st *ctx);
2100 typedef void free_key_fn(void *);
2101 typedef void *d2i_PKCS8_fn(void **, const unsigned char **, long,
2102 struct der2key_ctx_st *);
2103 struct keytype_desc_st {
2104 const char *keytype_name;
2105 const OSSL_DISPATCH *fns; /* Keymgmt (to pilfer functions from) */
2106
2107 /* The input structure name */
2108 const char *structure_name;
2109
2110 /*
2111 * The EVP_PKEY_xxx type macro. Should be zero for type specific
2112 * structures, non-zero when the outermost structure is PKCS#8 or
2113 * SubjectPublicKeyInfo. This determines which of the function
2114 * pointers below will be used.
2115 */
2116 int evp_type;
2117
2118 /* The selection mask for OSSL_FUNC_decoder_does_selection() */
2119 int selection_mask;
2120
2121 /* For type specific decoders, we use the corresponding d2i */
2122 d2i_of_void *d2i_private_key; /* From type-specific DER */
2123 d2i_of_void *d2i_public_key; /* From type-specific DER */
2124 d2i_of_void *d2i_key_params; /* From type-specific DER */
2125 d2i_PKCS8_fn *d2i_PKCS8; /* Wrapped in a PrivateKeyInfo */
2126 d2i_of_void *d2i_PUBKEY; /* Wrapped in a SubjectPublicKeyInfo */
2127
2128 /*
2129 * For any key, we may need to check that the key meets expectations.
2130 * This is useful when the same functions can decode several variants
2131 * of a key.
2132 */
2133 check_key_fn *check_key;
2134
2135 /*
2136 * For any key, we may need to make provider specific adjustments, such
2137 * as ensure the key carries the correct library context.
2138 */
2139 adjust_key_fn *adjust_key;
2140 /* {type}_free() */
2141 free_key_fn *free_key;
2142 };
2143
2144 /*
2145 * Start blatant code steal. Alternative: Open up d2i_X509_PUBKEY_INTERNAL
2146 * as per https://github.com/openssl/openssl/issues/16697 (TBD)
2147 * Code from openssl/crypto/x509/x_pubkey.c as
2148 * ossl_d2i_X509_PUBKEY_INTERNAL is presently not public
2149 */
2150 struct X509_pubkey_st {
2151 X509_ALGOR *algor;
2152 ASN1_BIT_STRING *public_key;
2153
2154 EVP_PKEY *pkey;
2155
2156 /* extra data for the callback, used by d2i_PUBKEY_ex */
2157 OSSL_LIB_CTX *libctx;
2158 char *propq;
2159 };
2160
2161 ASN1_SEQUENCE(X509_PUBKEY_INTERNAL) = {
2162 ASN1_SIMPLE(X509_PUBKEY, algor, X509_ALGOR),
2163 ASN1_SIMPLE(X509_PUBKEY, public_key, ASN1_BIT_STRING)
2164 } static_ASN1_SEQUENCE_END_name(X509_PUBKEY, X509_PUBKEY_INTERNAL)
2165
2166 static X509_PUBKEY *xorx_d2i_X509_PUBKEY_INTERNAL(const unsigned char **pp, long len, OSSL_LIB_CTX *libctx)
2167 {
2168 X509_PUBKEY *xpub = OPENSSL_zalloc(sizeof(*xpub));
2169
2170 if (xpub == NULL)
2171 return NULL;
2172 return (X509_PUBKEY *)ASN1_item_d2i_ex((ASN1_VALUE **)&xpub, pp, len,
2173 ASN1_ITEM_rptr(X509_PUBKEY_INTERNAL),
2174 libctx, NULL);
2175 }
2176 /* end steal https://github.com/openssl/openssl/issues/16697 */
2177
2178 /*
2179 * Context used for DER to key decoding.
2180 */
2181 struct der2key_ctx_st {
2182 PROV_XOR_CTX *provctx;
2183 struct keytype_desc_st *desc;
2184 /* The selection that is passed to xor_der2key_decode() */
2185 int selection;
2186 /* Flag used to signal that a failure is fatal */
2187 unsigned int flag_fatal : 1;
2188 };
2189
xor_read_der(PROV_XOR_CTX * provctx,OSSL_CORE_BIO * cin,unsigned char ** data,long * len)2190 static int xor_read_der(PROV_XOR_CTX *provctx, OSSL_CORE_BIO *cin,
2191 unsigned char **data, long *len)
2192 {
2193 BUF_MEM *mem = NULL;
2194 BIO *in = BIO_new_from_core_bio(provctx->libctx, cin);
2195 int ok = (asn1_d2i_read_bio(in, &mem) >= 0);
2196
2197 if (ok) {
2198 *data = (unsigned char *)mem->data;
2199 *len = (long)mem->length;
2200 OPENSSL_free(mem);
2201 }
2202 BIO_free(in);
2203 return ok;
2204 }
2205
2206 typedef void *key_from_pkcs8_t(const PKCS8_PRIV_KEY_INFO *p8inf,
2207 OSSL_LIB_CTX *libctx, const char *propq);
xor_der2key_decode_p8(const unsigned char ** input_der,long input_der_len,struct der2key_ctx_st * ctx,key_from_pkcs8_t * key_from_pkcs8)2208 static void *xor_der2key_decode_p8(const unsigned char **input_der,
2209 long input_der_len, struct der2key_ctx_st *ctx,
2210 key_from_pkcs8_t *key_from_pkcs8)
2211 {
2212 PKCS8_PRIV_KEY_INFO *p8inf = NULL;
2213 const X509_ALGOR *alg = NULL;
2214 void *key = NULL;
2215
2216 if ((p8inf = d2i_PKCS8_PRIV_KEY_INFO(NULL, input_der, input_der_len)) != NULL
2217 && PKCS8_pkey_get0(NULL, NULL, NULL, &alg, p8inf)
2218 && OBJ_obj2nid(alg->algorithm) == ctx->desc->evp_type)
2219 key = key_from_pkcs8(p8inf, PROV_XOR_LIBCTX_OF(ctx->provctx), NULL);
2220 PKCS8_PRIV_KEY_INFO_free(p8inf);
2221
2222 return key;
2223 }
2224
xor_d2i_PUBKEY(XORKEY ** a,const unsigned char ** pp,long length)2225 static XORKEY *xor_d2i_PUBKEY(XORKEY **a,
2226 const unsigned char **pp, long length)
2227 {
2228 XORKEY *key = NULL;
2229 X509_PUBKEY *xpk;
2230
2231 xpk = xorx_d2i_X509_PUBKEY_INTERNAL(pp, length, NULL);
2232
2233 key = xor_key_from_x509pubkey(xpk, NULL, NULL);
2234
2235 if (key == NULL)
2236 goto err_exit;
2237
2238 if (a != NULL) {
2239 xor_freekey(*a);
2240 *a = key;
2241 }
2242
2243 err_exit:
2244 X509_PUBKEY_free(xpk);
2245 return key;
2246 }
2247
2248 /* ---------------------------------------------------------------------- */
2249
2250 static OSSL_FUNC_decoder_freectx_fn der2key_freectx;
2251 static OSSL_FUNC_decoder_decode_fn xor_der2key_decode;
2252 static OSSL_FUNC_decoder_export_object_fn der2key_export_object;
2253
2254 static struct der2key_ctx_st *
der2key_newctx(void * provctx,struct keytype_desc_st * desc,const char * tls_name)2255 der2key_newctx(void *provctx, struct keytype_desc_st *desc, const char *tls_name)
2256 {
2257 struct der2key_ctx_st *ctx = OPENSSL_zalloc(sizeof(*ctx));
2258
2259 if (ctx != NULL) {
2260 ctx->provctx = provctx;
2261 ctx->desc = desc;
2262 if (desc->evp_type == 0) {
2263 ctx->desc->evp_type = OBJ_sn2nid(tls_name);
2264 }
2265 }
2266 return ctx;
2267 }
2268
der2key_freectx(void * vctx)2269 static void der2key_freectx(void *vctx)
2270 {
2271 struct der2key_ctx_st *ctx = vctx;
2272
2273 OPENSSL_free(ctx);
2274 }
2275
der2key_check_selection(int selection,const struct keytype_desc_st * desc)2276 static int der2key_check_selection(int selection,
2277 const struct keytype_desc_st *desc)
2278 {
2279 /*
2280 * The selections are kinda sorta "levels", i.e. each selection given
2281 * here is assumed to include those following.
2282 */
2283 int checks[] = {
2284 OSSL_KEYMGMT_SELECT_PRIVATE_KEY,
2285 OSSL_KEYMGMT_SELECT_PUBLIC_KEY,
2286 OSSL_KEYMGMT_SELECT_ALL_PARAMETERS
2287 };
2288 size_t i;
2289
2290 /* The decoder implementations made here support guessing */
2291 if (selection == 0)
2292 return 1;
2293
2294 for (i = 0; i < OSSL_NELEM(checks); i++) {
2295 int check1 = (selection & checks[i]) != 0;
2296 int check2 = (desc->selection_mask & checks[i]) != 0;
2297
2298 /*
2299 * If the caller asked for the currently checked bit(s), return
2300 * whether the decoder description says it's supported.
2301 */
2302 if (check1)
2303 return check2;
2304 }
2305
2306 /* This should be dead code, but just to be safe... */
2307 return 0;
2308 }
2309
xor_der2key_decode(void * vctx,OSSL_CORE_BIO * cin,int selection,OSSL_CALLBACK * data_cb,void * data_cbarg,OSSL_PASSPHRASE_CALLBACK * pw_cb,void * pw_cbarg)2310 static int xor_der2key_decode(void *vctx, OSSL_CORE_BIO *cin, int selection,
2311 OSSL_CALLBACK *data_cb, void *data_cbarg,
2312 OSSL_PASSPHRASE_CALLBACK *pw_cb, void *pw_cbarg)
2313 {
2314 struct der2key_ctx_st *ctx = vctx;
2315 unsigned char *der = NULL;
2316 const unsigned char *derp;
2317 long der_len = 0;
2318 void *key = NULL;
2319 int ok = 0;
2320
2321 ctx->selection = selection;
2322 /*
2323 * The caller is allowed to specify 0 as a selection mark, to have the
2324 * structure and key type guessed. For type-specific structures, this
2325 * is not recommended, as some structures are very similar.
2326 * Note that 0 isn't the same as OSSL_KEYMGMT_SELECT_ALL, as the latter
2327 * signifies a private key structure, where everything else is assumed
2328 * to be present as well.
2329 */
2330 if (selection == 0)
2331 selection = ctx->desc->selection_mask;
2332 if ((selection & ctx->desc->selection_mask) == 0) {
2333 ERR_raise(ERR_LIB_PROV, ERR_R_PASSED_INVALID_ARGUMENT);
2334 return 0;
2335 }
2336
2337 ok = xor_read_der(ctx->provctx, cin, &der, &der_len);
2338 if (!ok)
2339 goto next;
2340
2341 ok = 0; /* Assume that we fail */
2342
2343 if ((selection & OSSL_KEYMGMT_SELECT_PRIVATE_KEY) != 0) {
2344 derp = der;
2345 if (ctx->desc->d2i_PKCS8 != NULL) {
2346 key = ctx->desc->d2i_PKCS8(NULL, &derp, der_len, ctx);
2347 if (ctx->flag_fatal)
2348 goto end;
2349 } else if (ctx->desc->d2i_private_key != NULL) {
2350 key = ctx->desc->d2i_private_key(NULL, &derp, der_len);
2351 }
2352 if (key == NULL && ctx->selection != 0)
2353 goto next;
2354 }
2355 if (key == NULL && (selection & OSSL_KEYMGMT_SELECT_PUBLIC_KEY) != 0) {
2356 derp = der;
2357 if (ctx->desc->d2i_PUBKEY != NULL)
2358 key = ctx->desc->d2i_PUBKEY(NULL, &derp, der_len);
2359 else
2360 key = ctx->desc->d2i_public_key(NULL, &derp, der_len);
2361 if (key == NULL && ctx->selection != 0)
2362 goto next;
2363 }
2364 if (key == NULL && (selection & OSSL_KEYMGMT_SELECT_ALL_PARAMETERS) != 0) {
2365 derp = der;
2366 if (ctx->desc->d2i_key_params != NULL)
2367 key = ctx->desc->d2i_key_params(NULL, &derp, der_len);
2368 if (key == NULL && ctx->selection != 0)
2369 goto next;
2370 }
2371
2372 /*
2373 * Last minute check to see if this was the correct type of key. This
2374 * should never lead to a fatal error, i.e. the decoding itself was
2375 * correct, it was just an unexpected key type. This is generally for
2376 * classes of key types that have subtle variants, like RSA-PSS keys as
2377 * opposed to plain RSA keys.
2378 */
2379 if (key != NULL
2380 && ctx->desc->check_key != NULL
2381 && !ctx->desc->check_key(key, ctx)) {
2382 ctx->desc->free_key(key);
2383 key = NULL;
2384 }
2385
2386 if (key != NULL && ctx->desc->adjust_key != NULL)
2387 ctx->desc->adjust_key(key, ctx);
2388
2389 next:
2390 /*
2391 * Indicated that we successfully decoded something, or not at all.
2392 * Ending up "empty handed" is not an error.
2393 */
2394 ok = 1;
2395
2396 /*
2397 * We free memory here so it's not held up during the callback, because
2398 * we know the process is recursive and the allocated chunks of memory
2399 * add up.
2400 */
2401 OPENSSL_free(der);
2402 der = NULL;
2403
2404 if (key != NULL) {
2405 OSSL_PARAM params[4];
2406 int object_type = OSSL_OBJECT_PKEY;
2407
2408 params[0] = OSSL_PARAM_construct_int(OSSL_OBJECT_PARAM_TYPE, &object_type);
2409 params[1] = OSSL_PARAM_construct_utf8_string(OSSL_OBJECT_PARAM_DATA_TYPE,
2410 (char *)ctx->desc->keytype_name,
2411 0);
2412 /* The address of the key becomes the octet string */
2413 params[2] = OSSL_PARAM_construct_octet_string(OSSL_OBJECT_PARAM_REFERENCE,
2414 &key, sizeof(key));
2415 params[3] = OSSL_PARAM_construct_end();
2416
2417 ok = data_cb(params, data_cbarg);
2418 }
2419
2420 end:
2421 ctx->desc->free_key(key);
2422 OPENSSL_free(der);
2423
2424 return ok;
2425 }
2426
der2key_export_object(void * vctx,const void * reference,size_t reference_sz,OSSL_CALLBACK * export_cb,void * export_cbarg)2427 static int der2key_export_object(void *vctx,
2428 const void *reference, size_t reference_sz,
2429 OSSL_CALLBACK *export_cb, void *export_cbarg)
2430 {
2431 struct der2key_ctx_st *ctx = vctx;
2432 OSSL_FUNC_keymgmt_export_fn *export = xor_prov_get_keymgmt_export(ctx->desc->fns);
2433 void *keydata;
2434
2435 if (reference_sz == sizeof(keydata) && export != NULL) {
2436 /* The contents of the reference is the address to our object */
2437 keydata = *(void **)reference;
2438
2439 return export(keydata, ctx->selection, export_cb, export_cbarg);
2440 }
2441 return 0;
2442 }
2443
2444 /* ---------------------------------------------------------------------- */
2445
xorx_d2i_PKCS8(void ** key,const unsigned char ** der,long der_len,struct der2key_ctx_st * ctx)2446 static void *xorx_d2i_PKCS8(void **key, const unsigned char **der, long der_len,
2447 struct der2key_ctx_st *ctx)
2448 {
2449 return xor_der2key_decode_p8(der, der_len, ctx,
2450 (key_from_pkcs8_t *)xor_key_from_pkcs8);
2451 }
2452
xorx_key_adjust(void * key,struct der2key_ctx_st * ctx)2453 static void xorx_key_adjust(void *key, struct der2key_ctx_st *ctx)
2454 {
2455 }
2456
2457 /* ---------------------------------------------------------------------- */
2458
2459 #define DO_PrivateKeyInfo(keytype) \
2460 "PrivateKeyInfo", 0, \
2461 (OSSL_KEYMGMT_SELECT_PRIVATE_KEY), \
2462 NULL, \
2463 NULL, \
2464 NULL, \
2465 xorx_d2i_PKCS8, \
2466 NULL, \
2467 NULL, \
2468 xorx_key_adjust, \
2469 (free_key_fn *)xor_freekey
2470
2471 #define DO_SubjectPublicKeyInfo(keytype) \
2472 "SubjectPublicKeyInfo", 0, \
2473 (OSSL_KEYMGMT_SELECT_PUBLIC_KEY), \
2474 NULL, \
2475 NULL, \
2476 NULL, \
2477 NULL, \
2478 (d2i_of_void *)xor_d2i_PUBKEY, \
2479 NULL, \
2480 xorx_key_adjust, \
2481 (free_key_fn *)xor_freekey
2482
2483 /*
2484 * MAKE_DECODER is the single driver for creating OSSL_DISPATCH tables.
2485 * It takes the following arguments:
2486 *
2487 * keytype_name The implementation key type as a string.
2488 * keytype The implementation key type. This must correspond exactly
2489 * to our existing keymgmt keytype names... in other words,
2490 * there must exist an ossl_##keytype##_keymgmt_functions.
2491 * type The type name for the set of functions that implement the
2492 * decoder for the key type. This isn't necessarily the same
2493 * as keytype. For example, the key types ed25519, ed448,
2494 * x25519 and x448 are all handled by the same functions with
2495 * the common type name ecx.
2496 * kind The kind of support to implement. This translates into
2497 * the DO_##kind macros above, to populate the keytype_desc_st
2498 * structure.
2499 */
2500 #define MAKE_DECODER(keytype_name, keytype, type, kind) \
2501 static struct keytype_desc_st kind##_##keytype##_desc = { keytype_name, xor_##keytype##_keymgmt_functions, \
2502 DO_##kind(keytype) }; \
2503 \
2504 static OSSL_FUNC_decoder_newctx_fn kind##_der2##keytype##_newctx; \
2505 \
2506 static void *kind##_der2##keytype##_newctx(void *provctx) \
2507 { \
2508 return der2key_newctx(provctx, &kind##_##keytype##_desc, keytype_name); \
2509 } \
2510 static int kind##_der2##keytype##_does_selection(void *provctx, \
2511 int selection) \
2512 { \
2513 return der2key_check_selection(selection, \
2514 &kind##_##keytype##_desc); \
2515 } \
2516 static const OSSL_DISPATCH \
2517 xor_##kind##_der_to_##keytype##_decoder_functions[] \
2518 = { \
2519 { OSSL_FUNC_DECODER_NEWCTX, \
2520 (void (*)(void))kind##_der2##keytype##_newctx }, \
2521 { OSSL_FUNC_DECODER_FREECTX, \
2522 (void (*)(void))der2key_freectx }, \
2523 { OSSL_FUNC_DECODER_DOES_SELECTION, \
2524 (void (*)(void))kind##_der2##keytype##_does_selection }, \
2525 { OSSL_FUNC_DECODER_DECODE, \
2526 (void (*)(void))xor_der2key_decode }, \
2527 { OSSL_FUNC_DECODER_EXPORT_OBJECT, \
2528 (void (*)(void))der2key_export_object }, \
2529 OSSL_DISPATCH_END \
2530 }
2531
2532 MAKE_DECODER(XORSIGALG_NAME, xorhmacsig, xor, PrivateKeyInfo);
2533 MAKE_DECODER(XORSIGALG_NAME, xorhmacsig, xor, SubjectPublicKeyInfo);
2534 MAKE_DECODER(XORSIGALG_HASH_NAME, xorhmacsha2sig, xor, PrivateKeyInfo);
2535 MAKE_DECODER(XORSIGALG_HASH_NAME, xorhmacsha2sig, xor, SubjectPublicKeyInfo);
2536
2537 static const OSSL_ALGORITHM tls_prov_decoder[] = {
2538 #define DECODER_PROVIDER "tls-provider"
2539 #define DECODER_STRUCTURE_SubjectPublicKeyInfo "SubjectPublicKeyInfo"
2540 #define DECODER_STRUCTURE_PrivateKeyInfo "PrivateKeyInfo"
2541
2542 /* Arguments are prefixed with '_' to avoid build breaks on certain platforms */
2543 /*
2544 * Obviously this is not FIPS approved, but in order to test in conjunction
2545 * with the FIPS provider we pretend that it is.
2546 */
2547
2548 #define DECODER(_name, _input, _output) \
2549 { _name, \
2550 "provider=" DECODER_PROVIDER ",fips=yes,input=" #_input, \
2551 (xor_##_input##_to_##_output##_decoder_functions) }
2552 #define DECODER_w_structure(_name, _input, _structure, _output) \
2553 { _name, \
2554 "provider=" DECODER_PROVIDER ",fips=yes,input=" #_input \
2555 ",structure=" DECODER_STRUCTURE_##_structure, \
2556 (xor_##_structure##_##_input##_to_##_output##_decoder_functions) }
2557
2558 DECODER_w_structure(XORSIGALG_NAME, der, PrivateKeyInfo, xorhmacsig),
2559 DECODER_w_structure(XORSIGALG_NAME, der, SubjectPublicKeyInfo, xorhmacsig),
2560 DECODER_w_structure(XORSIGALG_HASH_NAME, der, PrivateKeyInfo, xorhmacsha2sig),
2561 DECODER_w_structure(XORSIGALG_HASH_NAME, der, SubjectPublicKeyInfo, xorhmacsha2sig),
2562 #undef DECODER_PROVIDER
2563 { NULL, NULL, NULL }
2564 };
2565
2566 #define OSSL_MAX_NAME_SIZE 50
2567 #define OSSL_MAX_PROPQUERY_SIZE 256 /* Property query strings */
2568
2569 static OSSL_FUNC_signature_newctx_fn xor_sig_newctx;
2570 static OSSL_FUNC_signature_sign_init_fn xor_sig_sign_init;
2571 static OSSL_FUNC_signature_verify_init_fn xor_sig_verify_init;
2572 static OSSL_FUNC_signature_sign_fn xor_sig_sign;
2573 static OSSL_FUNC_signature_verify_fn xor_sig_verify;
2574 static OSSL_FUNC_signature_digest_sign_init_fn xor_sig_digest_sign_init;
2575 static OSSL_FUNC_signature_digest_sign_update_fn xor_sig_digest_signverify_update;
2576 static OSSL_FUNC_signature_digest_sign_final_fn xor_sig_digest_sign_final;
2577 static OSSL_FUNC_signature_digest_verify_init_fn xor_sig_digest_verify_init;
2578 static OSSL_FUNC_signature_digest_verify_update_fn xor_sig_digest_signverify_update;
2579 static OSSL_FUNC_signature_digest_verify_final_fn xor_sig_digest_verify_final;
2580 static OSSL_FUNC_signature_freectx_fn xor_sig_freectx;
2581 static OSSL_FUNC_signature_dupctx_fn xor_sig_dupctx;
2582 static OSSL_FUNC_signature_get_ctx_params_fn xor_sig_get_ctx_params;
2583 static OSSL_FUNC_signature_gettable_ctx_params_fn xor_sig_gettable_ctx_params;
2584 static OSSL_FUNC_signature_set_ctx_params_fn xor_sig_set_ctx_params;
2585 static OSSL_FUNC_signature_settable_ctx_params_fn xor_sig_settable_ctx_params;
2586 static OSSL_FUNC_signature_get_ctx_md_params_fn xor_sig_get_ctx_md_params;
2587 static OSSL_FUNC_signature_gettable_ctx_md_params_fn xor_sig_gettable_ctx_md_params;
2588 static OSSL_FUNC_signature_set_ctx_md_params_fn xor_sig_set_ctx_md_params;
2589 static OSSL_FUNC_signature_settable_ctx_md_params_fn xor_sig_settable_ctx_md_params;
2590
xor_get_aid(unsigned char ** oidbuf,const char * tls_name)2591 static int xor_get_aid(unsigned char **oidbuf, const char *tls_name)
2592 {
2593 X509_ALGOR *algor = X509_ALGOR_new();
2594 int aidlen = 0;
2595
2596 X509_ALGOR_set0(algor, OBJ_txt2obj(tls_name, 0), V_ASN1_UNDEF, NULL);
2597
2598 aidlen = i2d_X509_ALGOR(algor, oidbuf);
2599 X509_ALGOR_free(algor);
2600 return (aidlen);
2601 }
2602
2603 /*
2604 * What's passed as an actual key is defined by the KEYMGMT interface.
2605 */
2606 typedef struct {
2607 OSSL_LIB_CTX *libctx;
2608 char *propq;
2609 XORKEY *sig;
2610
2611 /*
2612 * Flag to determine if the hash function can be changed (1) or not (0)
2613 * Because it's dangerous to change during a DigestSign or DigestVerify
2614 * operation, this flag is cleared by their Init function, and set again
2615 * by their Final function.
2616 */
2617 unsigned int flag_allow_md : 1;
2618
2619 char mdname[OSSL_MAX_NAME_SIZE];
2620
2621 /* The Algorithm Identifier of the combined signature algorithm */
2622 unsigned char *aid;
2623 size_t aid_len;
2624
2625 /* main digest */
2626 EVP_MD *md;
2627 EVP_MD_CTX *mdctx;
2628 int operation;
2629 } PROV_XORSIG_CTX;
2630
xor_sig_newctx(void * provctx,const char * propq)2631 static void *xor_sig_newctx(void *provctx, const char *propq)
2632 {
2633 PROV_XORSIG_CTX *pxor_sigctx;
2634
2635 pxor_sigctx = OPENSSL_zalloc(sizeof(PROV_XORSIG_CTX));
2636 if (pxor_sigctx == NULL)
2637 return NULL;
2638
2639 pxor_sigctx->libctx = ((PROV_XOR_CTX *)provctx)->libctx;
2640 pxor_sigctx->flag_allow_md = 0;
2641 if (propq != NULL && (pxor_sigctx->propq = OPENSSL_strdup(propq)) == NULL) {
2642 OPENSSL_free(pxor_sigctx);
2643 pxor_sigctx = NULL;
2644 ERR_raise(ERR_LIB_USER, ERR_R_MALLOC_FAILURE);
2645 }
2646 return pxor_sigctx;
2647 }
2648
xor_sig_setup_md(PROV_XORSIG_CTX * ctx,const char * mdname,const char * mdprops)2649 static int xor_sig_setup_md(PROV_XORSIG_CTX *ctx,
2650 const char *mdname, const char *mdprops)
2651 {
2652 EVP_MD *md;
2653
2654 if (mdprops == NULL)
2655 mdprops = ctx->propq;
2656
2657 md = EVP_MD_fetch(ctx->libctx, mdname, mdprops);
2658
2659 if ((md == NULL) || (EVP_MD_nid(md) == NID_undef)) {
2660 if (md == NULL)
2661 ERR_raise_data(ERR_LIB_USER, XORPROV_R_INVALID_DIGEST,
2662 "%s could not be fetched", mdname);
2663 EVP_MD_free(md);
2664 return 0;
2665 }
2666
2667 EVP_MD_CTX_free(ctx->mdctx);
2668 ctx->mdctx = NULL;
2669 EVP_MD_free(ctx->md);
2670 ctx->md = NULL;
2671
2672 OPENSSL_free(ctx->aid);
2673 ctx->aid = NULL;
2674 ctx->aid_len = xor_get_aid(&(ctx->aid), ctx->sig->tls_name);
2675 if (ctx->aid_len <= 0) {
2676 EVP_MD_free(md);
2677 return 0;
2678 }
2679
2680 ctx->mdctx = NULL;
2681 ctx->md = md;
2682 OPENSSL_strlcpy(ctx->mdname, mdname, sizeof(ctx->mdname));
2683 return 1;
2684 }
2685
xor_sig_signverify_init(void * vpxor_sigctx,void * vxorsig,int operation)2686 static int xor_sig_signverify_init(void *vpxor_sigctx, void *vxorsig,
2687 int operation)
2688 {
2689 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2690
2691 if (pxor_sigctx == NULL || vxorsig == NULL)
2692 return 0;
2693 xor_freekey(pxor_sigctx->sig);
2694 if (!xor_key_up_ref(vxorsig))
2695 return 0;
2696 pxor_sigctx->sig = vxorsig;
2697 pxor_sigctx->operation = operation;
2698 if ((operation == EVP_PKEY_OP_SIGN && pxor_sigctx->sig == NULL)
2699 || (operation == EVP_PKEY_OP_VERIFY && pxor_sigctx->sig == NULL)) {
2700 ERR_raise(ERR_LIB_USER, XORPROV_R_INVALID_KEY);
2701 return 0;
2702 }
2703 return 1;
2704 }
2705
xor_sig_sign_init(void * vpxor_sigctx,void * vxorsig,const OSSL_PARAM params[])2706 static int xor_sig_sign_init(void *vpxor_sigctx, void *vxorsig,
2707 const OSSL_PARAM params[])
2708 {
2709 return xor_sig_signverify_init(vpxor_sigctx, vxorsig, EVP_PKEY_OP_SIGN);
2710 }
2711
xor_sig_verify_init(void * vpxor_sigctx,void * vxorsig,const OSSL_PARAM params[])2712 static int xor_sig_verify_init(void *vpxor_sigctx, void *vxorsig,
2713 const OSSL_PARAM params[])
2714 {
2715 return xor_sig_signverify_init(vpxor_sigctx, vxorsig, EVP_PKEY_OP_VERIFY);
2716 }
2717
xor_sig_sign(void * vpxor_sigctx,unsigned char * sig,size_t * siglen,size_t sigsize,const unsigned char * tbs,size_t tbslen)2718 static int xor_sig_sign(void *vpxor_sigctx, unsigned char *sig, size_t *siglen,
2719 size_t sigsize, const unsigned char *tbs, size_t tbslen)
2720 {
2721 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2722 XORKEY *xorkey = pxor_sigctx->sig;
2723
2724 size_t max_sig_len = EVP_MAX_MD_SIZE;
2725 size_t xor_sig_len = 0;
2726 int rv = 0;
2727
2728 if (xorkey == NULL || !xorkey->hasprivkey) {
2729 ERR_raise(ERR_LIB_USER, XORPROV_R_NO_PRIVATE_KEY);
2730 return rv;
2731 }
2732
2733 if (sig == NULL) {
2734 *siglen = max_sig_len;
2735 return 1;
2736 }
2737 if (*siglen < max_sig_len) {
2738 ERR_raise(ERR_LIB_USER, XORPROV_R_BUFFER_LENGTH_WRONG);
2739 return rv;
2740 }
2741
2742 /*
2743 * create HMAC using XORKEY as key and hash as data:
2744 * No real crypto, just for test, don't do this at home!
2745 */
2746 if (!EVP_Q_mac(pxor_sigctx->libctx, "HMAC", NULL, "sha1", NULL,
2747 xorkey->privkey, XOR_KEY_SIZE, tbs, tbslen,
2748 &sig[0], EVP_MAX_MD_SIZE, &xor_sig_len)) {
2749 ERR_raise(ERR_LIB_USER, XORPROV_R_SIGNING_FAILED);
2750 goto endsign;
2751 }
2752
2753 *siglen = xor_sig_len;
2754 rv = 1; /* success */
2755
2756 endsign:
2757 return rv;
2758 }
2759
xor_sig_verify(void * vpxor_sigctx,const unsigned char * sig,size_t siglen,const unsigned char * tbs,size_t tbslen)2760 static int xor_sig_verify(void *vpxor_sigctx,
2761 const unsigned char *sig, size_t siglen,
2762 const unsigned char *tbs, size_t tbslen)
2763 {
2764 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2765 XORKEY *xorkey = pxor_sigctx->sig;
2766 unsigned char resignature[EVP_MAX_MD_SIZE];
2767 size_t resiglen;
2768 int i;
2769
2770 if (xorkey == NULL || sig == NULL || tbs == NULL) {
2771 ERR_raise(ERR_LIB_USER, XORPROV_R_WRONG_PARAMETERS);
2772 return 0;
2773 }
2774
2775 /*
2776 * This is no real verify: just re-sign and compare:
2777 * Don't do this at home! Not fit for real use!
2778 */
2779 /* First re-create private key from public key: */
2780 for (i = 0; i < XOR_KEY_SIZE; i++)
2781 xorkey->privkey[i] = xorkey->pubkey[i] ^ private_constant[i];
2782
2783 /* Now re-create signature */
2784 if (!EVP_Q_mac(pxor_sigctx->libctx, "HMAC", NULL, "sha1", NULL,
2785 xorkey->privkey, XOR_KEY_SIZE, tbs, tbslen,
2786 &resignature[0], EVP_MAX_MD_SIZE, &resiglen)) {
2787 ERR_raise(ERR_LIB_USER, XORPROV_R_VERIFY_ERROR);
2788 return 0;
2789 }
2790
2791 /* Now compare with signature passed */
2792 if (siglen != resiglen || memcmp(resignature, sig, siglen) != 0) {
2793 ERR_raise(ERR_LIB_USER, XORPROV_R_VERIFY_ERROR);
2794 return 0;
2795 }
2796 return 1;
2797 }
2798
xor_sig_digest_signverify_init(void * vpxor_sigctx,const char * mdname,void * vxorsig,int operation)2799 static int xor_sig_digest_signverify_init(void *vpxor_sigctx, const char *mdname,
2800 void *vxorsig, int operation)
2801 {
2802 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2803 char *rmdname = (char *)mdname;
2804
2805 if (rmdname == NULL)
2806 rmdname = "sha256";
2807
2808 pxor_sigctx->flag_allow_md = 0;
2809 if (!xor_sig_signverify_init(vpxor_sigctx, vxorsig, operation))
2810 return 0;
2811
2812 if (!xor_sig_setup_md(pxor_sigctx, rmdname, NULL))
2813 return 0;
2814
2815 pxor_sigctx->mdctx = EVP_MD_CTX_new();
2816 if (pxor_sigctx->mdctx == NULL)
2817 goto error;
2818
2819 if (!EVP_DigestInit_ex(pxor_sigctx->mdctx, pxor_sigctx->md, NULL))
2820 goto error;
2821
2822 return 1;
2823
2824 error:
2825 EVP_MD_CTX_free(pxor_sigctx->mdctx);
2826 EVP_MD_free(pxor_sigctx->md);
2827 pxor_sigctx->mdctx = NULL;
2828 pxor_sigctx->md = NULL;
2829 return 0;
2830 }
2831
xor_sig_digest_sign_init(void * vpxor_sigctx,const char * mdname,void * vxorsig,const OSSL_PARAM params[])2832 static int xor_sig_digest_sign_init(void *vpxor_sigctx, const char *mdname,
2833 void *vxorsig, const OSSL_PARAM params[])
2834 {
2835 return xor_sig_digest_signverify_init(vpxor_sigctx, mdname, vxorsig,
2836 EVP_PKEY_OP_SIGN);
2837 }
2838
xor_sig_digest_verify_init(void * vpxor_sigctx,const char * mdname,void * vxorsig,const OSSL_PARAM params[])2839 static int xor_sig_digest_verify_init(void *vpxor_sigctx, const char *mdname, void *vxorsig, const OSSL_PARAM params[])
2840 {
2841 return xor_sig_digest_signverify_init(vpxor_sigctx, mdname,
2842 vxorsig, EVP_PKEY_OP_VERIFY);
2843 }
2844
xor_sig_digest_signverify_update(void * vpxor_sigctx,const unsigned char * data,size_t datalen)2845 int xor_sig_digest_signverify_update(void *vpxor_sigctx,
2846 const unsigned char *data,
2847 size_t datalen)
2848 {
2849 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2850
2851 if (pxor_sigctx == NULL || pxor_sigctx->mdctx == NULL)
2852 return 0;
2853
2854 return EVP_DigestUpdate(pxor_sigctx->mdctx, data, datalen);
2855 }
2856
xor_sig_digest_sign_final(void * vpxor_sigctx,unsigned char * sig,size_t * siglen,size_t sigsize)2857 int xor_sig_digest_sign_final(void *vpxor_sigctx,
2858 unsigned char *sig, size_t *siglen,
2859 size_t sigsize)
2860 {
2861 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2862 unsigned char digest[EVP_MAX_MD_SIZE];
2863 unsigned int dlen = 0;
2864
2865 if (sig != NULL) {
2866 if (pxor_sigctx == NULL || pxor_sigctx->mdctx == NULL)
2867 return 0;
2868
2869 if (!EVP_DigestFinal_ex(pxor_sigctx->mdctx, digest, &dlen))
2870 return 0;
2871
2872 pxor_sigctx->flag_allow_md = 1;
2873 }
2874
2875 return xor_sig_sign(vpxor_sigctx, sig, siglen, sigsize, digest, (size_t)dlen);
2876 }
2877
xor_sig_digest_verify_final(void * vpxor_sigctx,const unsigned char * sig,size_t siglen)2878 int xor_sig_digest_verify_final(void *vpxor_sigctx, const unsigned char *sig,
2879 size_t siglen)
2880 {
2881 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2882 unsigned char digest[EVP_MAX_MD_SIZE];
2883 unsigned int dlen = 0;
2884
2885 if (pxor_sigctx == NULL || pxor_sigctx->mdctx == NULL)
2886 return 0;
2887
2888 if (!EVP_DigestFinal_ex(pxor_sigctx->mdctx, digest, &dlen))
2889 return 0;
2890
2891 pxor_sigctx->flag_allow_md = 1;
2892
2893 return xor_sig_verify(vpxor_sigctx, sig, siglen, digest, (size_t)dlen);
2894 }
2895
xor_sig_freectx(void * vpxor_sigctx)2896 static void xor_sig_freectx(void *vpxor_sigctx)
2897 {
2898 PROV_XORSIG_CTX *ctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2899
2900 OPENSSL_free(ctx->propq);
2901 EVP_MD_CTX_free(ctx->mdctx);
2902 EVP_MD_free(ctx->md);
2903 ctx->propq = NULL;
2904 ctx->mdctx = NULL;
2905 ctx->md = NULL;
2906 xor_freekey(ctx->sig);
2907 ctx->sig = NULL;
2908 OPENSSL_free(ctx->aid);
2909 OPENSSL_free(ctx);
2910 }
2911
xor_sig_dupctx(void * vpxor_sigctx)2912 static void *xor_sig_dupctx(void *vpxor_sigctx)
2913 {
2914 PROV_XORSIG_CTX *srcctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2915 PROV_XORSIG_CTX *dstctx;
2916
2917 dstctx = OPENSSL_zalloc(sizeof(*srcctx));
2918 if (dstctx == NULL)
2919 return NULL;
2920
2921 *dstctx = *srcctx;
2922 dstctx->sig = NULL;
2923 dstctx->md = NULL;
2924 dstctx->mdctx = NULL;
2925 dstctx->aid = NULL;
2926
2927 if ((srcctx->sig != NULL) && !xor_key_up_ref(srcctx->sig))
2928 goto err;
2929 dstctx->sig = srcctx->sig;
2930
2931 if (srcctx->md != NULL && !EVP_MD_up_ref(srcctx->md))
2932 goto err;
2933 dstctx->md = srcctx->md;
2934
2935 if (srcctx->mdctx != NULL) {
2936 dstctx->mdctx = EVP_MD_CTX_new();
2937 if (dstctx->mdctx == NULL
2938 || !EVP_MD_CTX_copy_ex(dstctx->mdctx, srcctx->mdctx))
2939 goto err;
2940 }
2941
2942 return dstctx;
2943 err:
2944 xor_sig_freectx(dstctx);
2945 return NULL;
2946 }
2947
xor_sig_get_ctx_params(void * vpxor_sigctx,OSSL_PARAM * params)2948 static int xor_sig_get_ctx_params(void *vpxor_sigctx, OSSL_PARAM *params)
2949 {
2950 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2951 OSSL_PARAM *p;
2952
2953 if (pxor_sigctx == NULL || params == NULL)
2954 return 0;
2955
2956 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_ALGORITHM_ID);
2957
2958 if (pxor_sigctx->aid == NULL)
2959 pxor_sigctx->aid_len = xor_get_aid(&(pxor_sigctx->aid), pxor_sigctx->sig->tls_name);
2960
2961 if (p != NULL
2962 && !OSSL_PARAM_set_octet_string(p, pxor_sigctx->aid, pxor_sigctx->aid_len))
2963 return 0;
2964
2965 p = OSSL_PARAM_locate(params, OSSL_SIGNATURE_PARAM_DIGEST);
2966 if (p != NULL && !OSSL_PARAM_set_utf8_string(p, pxor_sigctx->mdname))
2967 return 0;
2968
2969 return 1;
2970 }
2971
2972 static const OSSL_PARAM known_gettable_ctx_params[] = {
2973 OSSL_PARAM_octet_string(OSSL_SIGNATURE_PARAM_ALGORITHM_ID, NULL, 0),
2974 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
2975 OSSL_PARAM_END
2976 };
2977
xor_sig_gettable_ctx_params(ossl_unused void * vpxor_sigctx,ossl_unused void * vctx)2978 static const OSSL_PARAM *xor_sig_gettable_ctx_params(ossl_unused void *vpxor_sigctx, ossl_unused void *vctx)
2979 {
2980 return known_gettable_ctx_params;
2981 }
2982
xor_sig_set_ctx_params(void * vpxor_sigctx,const OSSL_PARAM params[])2983 static int xor_sig_set_ctx_params(void *vpxor_sigctx, const OSSL_PARAM params[])
2984 {
2985 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
2986 const OSSL_PARAM *p;
2987
2988 if (pxor_sigctx == NULL || params == NULL)
2989 return 0;
2990
2991 p = OSSL_PARAM_locate_const(params, OSSL_SIGNATURE_PARAM_DIGEST);
2992 /* Not allowed during certain operations */
2993 if (p != NULL && !pxor_sigctx->flag_allow_md)
2994 return 0;
2995 if (p != NULL) {
2996 char mdname[OSSL_MAX_NAME_SIZE] = "", *pmdname = mdname;
2997 char mdprops[OSSL_MAX_PROPQUERY_SIZE] = "", *pmdprops = mdprops;
2998 const OSSL_PARAM *propsp = OSSL_PARAM_locate_const(params,
2999 OSSL_SIGNATURE_PARAM_PROPERTIES);
3000
3001 if (!OSSL_PARAM_get_utf8_string(p, &pmdname, sizeof(mdname)))
3002 return 0;
3003 if (propsp != NULL
3004 && !OSSL_PARAM_get_utf8_string(propsp, &pmdprops, sizeof(mdprops)))
3005 return 0;
3006 if (!xor_sig_setup_md(pxor_sigctx, mdname, mdprops))
3007 return 0;
3008 }
3009
3010 return 1;
3011 }
3012
3013 static const OSSL_PARAM known_settable_ctx_params[] = {
3014 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_DIGEST, NULL, 0),
3015 OSSL_PARAM_utf8_string(OSSL_SIGNATURE_PARAM_PROPERTIES, NULL, 0),
3016 OSSL_PARAM_END
3017 };
3018
xor_sig_settable_ctx_params(ossl_unused void * vpsm2ctx,ossl_unused void * provctx)3019 static const OSSL_PARAM *xor_sig_settable_ctx_params(ossl_unused void *vpsm2ctx,
3020 ossl_unused void *provctx)
3021 {
3022 return known_settable_ctx_params;
3023 }
3024
xor_sig_get_ctx_md_params(void * vpxor_sigctx,OSSL_PARAM * params)3025 static int xor_sig_get_ctx_md_params(void *vpxor_sigctx, OSSL_PARAM *params)
3026 {
3027 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
3028
3029 if (pxor_sigctx->mdctx == NULL)
3030 return 0;
3031
3032 return EVP_MD_CTX_get_params(pxor_sigctx->mdctx, params);
3033 }
3034
xor_sig_gettable_ctx_md_params(void * vpxor_sigctx)3035 static const OSSL_PARAM *xor_sig_gettable_ctx_md_params(void *vpxor_sigctx)
3036 {
3037 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
3038
3039 if (pxor_sigctx->md == NULL)
3040 return 0;
3041
3042 return EVP_MD_gettable_ctx_params(pxor_sigctx->md);
3043 }
3044
xor_sig_set_ctx_md_params(void * vpxor_sigctx,const OSSL_PARAM params[])3045 static int xor_sig_set_ctx_md_params(void *vpxor_sigctx, const OSSL_PARAM params[])
3046 {
3047 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
3048
3049 if (pxor_sigctx->mdctx == NULL)
3050 return 0;
3051
3052 return EVP_MD_CTX_set_params(pxor_sigctx->mdctx, params);
3053 }
3054
xor_sig_settable_ctx_md_params(void * vpxor_sigctx)3055 static const OSSL_PARAM *xor_sig_settable_ctx_md_params(void *vpxor_sigctx)
3056 {
3057 PROV_XORSIG_CTX *pxor_sigctx = (PROV_XORSIG_CTX *)vpxor_sigctx;
3058
3059 if (pxor_sigctx->md == NULL)
3060 return 0;
3061
3062 return EVP_MD_settable_ctx_params(pxor_sigctx->md);
3063 }
3064
3065 static const OSSL_DISPATCH xor_signature_functions[] = {
3066 { OSSL_FUNC_SIGNATURE_NEWCTX, (void (*)(void))xor_sig_newctx },
3067 { OSSL_FUNC_SIGNATURE_SIGN_INIT, (void (*)(void))xor_sig_sign_init },
3068 { OSSL_FUNC_SIGNATURE_SIGN, (void (*)(void))xor_sig_sign },
3069 { OSSL_FUNC_SIGNATURE_VERIFY_INIT, (void (*)(void))xor_sig_verify_init },
3070 { OSSL_FUNC_SIGNATURE_VERIFY, (void (*)(void))xor_sig_verify },
3071 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_INIT,
3072 (void (*)(void))xor_sig_digest_sign_init },
3073 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_UPDATE,
3074 (void (*)(void))xor_sig_digest_signverify_update },
3075 { OSSL_FUNC_SIGNATURE_DIGEST_SIGN_FINAL,
3076 (void (*)(void))xor_sig_digest_sign_final },
3077 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_INIT,
3078 (void (*)(void))xor_sig_digest_verify_init },
3079 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_UPDATE,
3080 (void (*)(void))xor_sig_digest_signverify_update },
3081 { OSSL_FUNC_SIGNATURE_DIGEST_VERIFY_FINAL,
3082 (void (*)(void))xor_sig_digest_verify_final },
3083 { OSSL_FUNC_SIGNATURE_FREECTX, (void (*)(void))xor_sig_freectx },
3084 { OSSL_FUNC_SIGNATURE_DUPCTX, (void (*)(void))xor_sig_dupctx },
3085 { OSSL_FUNC_SIGNATURE_GET_CTX_PARAMS, (void (*)(void))xor_sig_get_ctx_params },
3086 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_PARAMS,
3087 (void (*)(void))xor_sig_gettable_ctx_params },
3088 { OSSL_FUNC_SIGNATURE_SET_CTX_PARAMS, (void (*)(void))xor_sig_set_ctx_params },
3089 { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_PARAMS,
3090 (void (*)(void))xor_sig_settable_ctx_params },
3091 { OSSL_FUNC_SIGNATURE_GET_CTX_MD_PARAMS,
3092 (void (*)(void))xor_sig_get_ctx_md_params },
3093 { OSSL_FUNC_SIGNATURE_GETTABLE_CTX_MD_PARAMS,
3094 (void (*)(void))xor_sig_gettable_ctx_md_params },
3095 { OSSL_FUNC_SIGNATURE_SET_CTX_MD_PARAMS,
3096 (void (*)(void))xor_sig_set_ctx_md_params },
3097 { OSSL_FUNC_SIGNATURE_SETTABLE_CTX_MD_PARAMS,
3098 (void (*)(void))xor_sig_settable_ctx_md_params },
3099 OSSL_DISPATCH_END
3100 };
3101
3102 static const OSSL_ALGORITHM tls_prov_signature[] = {
3103 /*
3104 * Obviously this is not FIPS approved, but in order to test in conjunction
3105 * with the FIPS provider we pretend that it is.
3106 */
3107 { XORSIGALG_NAME, "provider=tls-provider,fips=yes",
3108 xor_signature_functions },
3109 { XORSIGALG_HASH_NAME, "provider=tls-provider,fips=yes",
3110 xor_signature_functions },
3111 { XORSIGALG12_NAME, "provider=tls-provider,fips=yes",
3112 xor_signature_functions },
3113 { NULL, NULL, NULL }
3114 };
3115
tls_prov_query(void * provctx,int operation_id,int * no_cache)3116 static const OSSL_ALGORITHM *tls_prov_query(void *provctx, int operation_id,
3117 int *no_cache)
3118 {
3119 *no_cache = 0;
3120 switch (operation_id) {
3121 case OSSL_OP_KEYMGMT:
3122 return tls_prov_keymgmt;
3123 case OSSL_OP_KEYEXCH:
3124 return tls_prov_keyexch;
3125 case OSSL_OP_KEM:
3126 return tls_prov_kem;
3127 case OSSL_OP_ENCODER:
3128 return tls_prov_encoder;
3129 case OSSL_OP_DECODER:
3130 return tls_prov_decoder;
3131 case OSSL_OP_SIGNATURE:
3132 return tls_prov_signature;
3133 }
3134 return NULL;
3135 }
3136
tls_prov_teardown(void * provctx)3137 static void tls_prov_teardown(void *provctx)
3138 {
3139 int i;
3140 PROV_XOR_CTX *pctx = (PROV_XOR_CTX *)provctx;
3141
3142 OSSL_LIB_CTX_free(pctx->libctx);
3143
3144 for (i = 0; i < NUM_DUMMY_GROUPS; i++) {
3145 OPENSSL_free(dummy_group_names[i]);
3146 dummy_group_names[i] = NULL;
3147 }
3148 OPENSSL_free(pctx);
3149 }
3150
3151 /* Functions we provide to the core */
3152 static const OSSL_DISPATCH tls_prov_dispatch_table[] = {
3153 { OSSL_FUNC_PROVIDER_TEARDOWN, (void (*)(void))tls_prov_teardown },
3154 { OSSL_FUNC_PROVIDER_QUERY_OPERATION, (void (*)(void))tls_prov_query },
3155 { OSSL_FUNC_PROVIDER_GET_CAPABILITIES, (void (*)(void))tls_prov_get_capabilities },
3156 OSSL_DISPATCH_END
3157 };
3158
randomize_tls_alg_id(OSSL_LIB_CTX * libctx)3159 static unsigned int randomize_tls_alg_id(OSSL_LIB_CTX *libctx)
3160 {
3161 /*
3162 * Randomise the id we're going to use to ensure we don't interoperate
3163 * with anything but ourselves.
3164 */
3165 unsigned int id;
3166 static unsigned int mem[10] = { 0 };
3167 static int in_mem = 0;
3168 int i;
3169
3170 retry:
3171 if (RAND_bytes_ex(libctx, (unsigned char *)&id, sizeof(id), 0) <= 0)
3172 return 0;
3173 /*
3174 * Ensure id is within the IANA Reserved for private use range
3175 * (65024-65279).
3176 * Carve out NUM_DUMMY_GROUPS ids for properly registering those.
3177 */
3178 id %= 65279 - NUM_DUMMY_GROUPS - 65024;
3179 id += 65024;
3180
3181 /* Ensure we did not already issue this id */
3182 for (i = 0; i < in_mem; i++)
3183 if (mem[i] == id)
3184 goto retry;
3185
3186 /* Add this id to the list of ids issued by this function */
3187 mem[in_mem++] = id;
3188
3189 return id;
3190 }
3191
tls_provider_init(const OSSL_CORE_HANDLE * handle,const OSSL_DISPATCH * in,const OSSL_DISPATCH ** out,void ** provctx)3192 int tls_provider_init(const OSSL_CORE_HANDLE *handle,
3193 const OSSL_DISPATCH *in,
3194 const OSSL_DISPATCH **out,
3195 void **provctx)
3196 {
3197 OSSL_LIB_CTX *libctx = OSSL_LIB_CTX_new_from_dispatch(handle, in);
3198 OSSL_FUNC_core_obj_create_fn *c_obj_create = NULL;
3199 OSSL_FUNC_core_obj_add_sigid_fn *c_obj_add_sigid = NULL;
3200 PROV_XOR_CTX *xor_prov_ctx = xor_newprovctx(libctx);
3201
3202 if (libctx == NULL || xor_prov_ctx == NULL)
3203 goto err;
3204
3205 *provctx = xor_prov_ctx;
3206
3207 /*
3208 * Randomise the group_id and code_points we're going to use to ensure we
3209 * don't interoperate with anything but ourselves.
3210 */
3211 xor_group.group_id = randomize_tls_alg_id(libctx);
3212 xor_kemgroup.group_id = randomize_tls_alg_id(libctx);
3213 xor_sigalg.code_point = randomize_tls_alg_id(libctx);
3214 xor_sigalg_hash.code_point = randomize_tls_alg_id(libctx);
3215
3216 /* Retrieve registration functions */
3217 for (; in->function_id != 0; in++) {
3218 switch (in->function_id) {
3219 case OSSL_FUNC_CORE_OBJ_CREATE:
3220 c_obj_create = OSSL_FUNC_core_obj_create(in);
3221 break;
3222 case OSSL_FUNC_CORE_OBJ_ADD_SIGID:
3223 c_obj_add_sigid = OSSL_FUNC_core_obj_add_sigid(in);
3224 break;
3225 /* Just ignore anything we don't understand */
3226 default:
3227 break;
3228 }
3229 }
3230
3231 /*
3232 * Register algorithms manually as add_provider_sigalgs is
3233 * only called during session establishment -- too late for
3234 * key & cert generation...
3235 */
3236 if (!c_obj_create(handle, XORSIGALG_OID, XORSIGALG_NAME, XORSIGALG_NAME)) {
3237 ERR_raise(ERR_LIB_USER, XORPROV_R_OBJ_CREATE_ERR);
3238 goto err;
3239 }
3240
3241 if (!c_obj_add_sigid(handle, XORSIGALG_OID, "", XORSIGALG_OID)) {
3242 ERR_raise(ERR_LIB_USER, XORPROV_R_OBJ_CREATE_ERR);
3243 goto err;
3244 }
3245 if (!c_obj_create(handle, XORSIGALG_HASH_OID, XORSIGALG_HASH_NAME, NULL)) {
3246 ERR_raise(ERR_LIB_USER, XORPROV_R_OBJ_CREATE_ERR);
3247 goto err;
3248 }
3249
3250 if (!c_obj_add_sigid(handle, XORSIGALG_HASH_OID, XORSIGALG_HASH, XORSIGALG_HASH_OID)) {
3251 ERR_raise(ERR_LIB_USER, XORPROV_R_OBJ_CREATE_ERR);
3252 goto err;
3253 }
3254
3255 *out = tls_prov_dispatch_table;
3256 return 1;
3257
3258 err:
3259 OPENSSL_free(xor_prov_ctx);
3260 *provctx = NULL;
3261 OSSL_LIB_CTX_free(libctx);
3262 return 0;
3263 }
3264