1 /*
2 * Copyright 2017-2026 The OpenSSL Project Authors. All Rights Reserved.
3 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Licensed under the Apache License 2.0 (the "License"). You may not use
6 * this file except in compliance with the License. You can obtain a copy
7 * in the file LICENSE in the source distribution or at
8 * https://www.openssl.org/source/license.html
9 */
10
11 #include "internal/deprecated.h"
12
13 #include "internal/cryptlib.h"
14 #ifndef OPENSSL_NO_ARIA
15 #include <openssl/evp.h>
16 #include <openssl/modes.h>
17 #include <openssl/rand.h>
18 #include "crypto/aria.h"
19 #include "crypto/evp.h"
20 #include "crypto/modes.h"
21 #include "evp_local.h"
22
23 /* ARIA subkey Structure */
24 typedef struct {
25 ARIA_KEY ks;
26 } EVP_ARIA_KEY;
27
28 /* ARIA GCM context */
29 typedef struct {
30 union {
31 OSSL_UNION_ALIGN;
32 ARIA_KEY ks;
33 } ks; /* ARIA subkey to use */
34 int key_set; /* Set if key initialised */
35 int iv_set; /* Set if an iv is set */
36 GCM128_CONTEXT gcm;
37 unsigned char *iv; /* Temporary IV store */
38 int ivlen; /* IV length */
39 int taglen;
40 int iv_gen; /* It is OK to generate IVs */
41 int tls_aad_len; /* TLS AAD length */
42 } EVP_ARIA_GCM_CTX;
43
44 /* ARIA CCM context */
45 typedef struct {
46 union {
47 OSSL_UNION_ALIGN;
48 ARIA_KEY ks;
49 } ks; /* ARIA key schedule to use */
50 int key_set; /* Set if key initialised */
51 int iv_set; /* Set if an iv is set */
52 int tag_set; /* Set if tag is valid */
53 int len_set; /* Set if message length set */
54 int L, M; /* L and M parameters from RFC3610 */
55 int tls_aad_len; /* TLS AAD length */
56 CCM128_CONTEXT ccm;
57 ccm128_f str;
58 } EVP_ARIA_CCM_CTX;
59
60 /* The subkey for ARIA is generated. */
aria_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)61 static int aria_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
62 const unsigned char *iv, int enc)
63 {
64 int ret;
65 int mode = EVP_CIPHER_CTX_get_mode(ctx);
66
67 if (enc || (mode != EVP_CIPH_ECB_MODE && mode != EVP_CIPH_CBC_MODE))
68 ret = ossl_aria_set_encrypt_key(key,
69 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
70 EVP_CIPHER_CTX_get_cipher_data(ctx));
71 else
72 ret = ossl_aria_set_decrypt_key(key,
73 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
74 EVP_CIPHER_CTX_get_cipher_data(ctx));
75 if (ret < 0) {
76 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
77 return 0;
78 }
79 return 1;
80 }
81
aria_cbc_encrypt(const unsigned char * in,unsigned char * out,size_t len,const ARIA_KEY * key,unsigned char * ivec,const int enc)82 static void aria_cbc_encrypt(const unsigned char *in, unsigned char *out,
83 size_t len, const ARIA_KEY *key,
84 unsigned char *ivec, const int enc)
85 {
86
87 if (enc)
88 CRYPTO_cbc128_encrypt(in, out, len, key, ivec,
89 (block128_f)ossl_aria_encrypt);
90 else
91 CRYPTO_cbc128_decrypt(in, out, len, key, ivec,
92 (block128_f)ossl_aria_encrypt);
93 }
94
aria_cfb128_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)95 static void aria_cfb128_encrypt(const unsigned char *in, unsigned char *out,
96 size_t length, const ARIA_KEY *key,
97 unsigned char *ivec, int *num, const int enc)
98 {
99
100 CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
101 (block128_f)ossl_aria_encrypt);
102 }
103
aria_cfb1_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)104 static void aria_cfb1_encrypt(const unsigned char *in, unsigned char *out,
105 size_t length, const ARIA_KEY *key,
106 unsigned char *ivec, int *num, const int enc)
107 {
108 CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
109 (block128_f)ossl_aria_encrypt);
110 }
111
aria_cfb8_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num,const int enc)112 static void aria_cfb8_encrypt(const unsigned char *in, unsigned char *out,
113 size_t length, const ARIA_KEY *key,
114 unsigned char *ivec, int *num, const int enc)
115 {
116 CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
117 (block128_f)ossl_aria_encrypt);
118 }
119
aria_ecb_encrypt(const unsigned char * in,unsigned char * out,const ARIA_KEY * key,const int enc)120 static void aria_ecb_encrypt(const unsigned char *in, unsigned char *out,
121 const ARIA_KEY *key, const int enc)
122 {
123 ossl_aria_encrypt(in, out, key);
124 }
125
aria_ofb128_encrypt(const unsigned char * in,unsigned char * out,size_t length,const ARIA_KEY * key,unsigned char * ivec,int * num)126 static void aria_ofb128_encrypt(const unsigned char *in, unsigned char *out,
127 size_t length, const ARIA_KEY *key,
128 unsigned char *ivec, int *num)
129 {
130 CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
131 (block128_f)ossl_aria_encrypt);
132 }
133
134 IMPLEMENT_BLOCK_CIPHER(aria_128, ks, aria, EVP_ARIA_KEY,
135 NID_aria_128, 16, 16, 16, 128,
136 0, aria_init_key, NULL,
137 EVP_CIPHER_set_asn1_iv,
138 EVP_CIPHER_get_asn1_iv,
139 NULL)
140 IMPLEMENT_BLOCK_CIPHER(aria_192, ks, aria, EVP_ARIA_KEY,
141 NID_aria_192, 16, 24, 16, 128,
142 0, aria_init_key, NULL,
143 EVP_CIPHER_set_asn1_iv,
144 EVP_CIPHER_get_asn1_iv,
145 NULL)
146 IMPLEMENT_BLOCK_CIPHER(aria_256, ks, aria, EVP_ARIA_KEY,
147 NID_aria_256, 16, 32, 16, 128,
148 0, aria_init_key, NULL,
149 EVP_CIPHER_set_asn1_iv,
150 EVP_CIPHER_get_asn1_iv,
151 NULL)
152
153 #define IMPLEMENT_ARIA_CFBR(ksize, cbits) \
154 IMPLEMENT_CFBR(aria, aria, EVP_ARIA_KEY, ks, ksize, cbits, 16, 0)
155 IMPLEMENT_ARIA_CFBR(128, 1)
156 IMPLEMENT_ARIA_CFBR(192, 1)
157 IMPLEMENT_ARIA_CFBR(256, 1)
158 IMPLEMENT_ARIA_CFBR(128, 8)
159 IMPLEMENT_ARIA_CFBR(192, 8)
160 IMPLEMENT_ARIA_CFBR(256, 8)
161
162 #define BLOCK_CIPHER_generic(nid, keylen, blocksize, ivlen, nmode, mode, MODE, flags) \
163 static const EVP_CIPHER aria_##keylen##_##mode = { \
164 nid##_##keylen##_##nmode, blocksize, keylen / 8, ivlen, \
165 flags | EVP_CIPH_##MODE##_MODE, \
166 EVP_ORIG_GLOBAL, \
167 aria_init_key, \
168 aria_##mode##_cipher, \
169 NULL, \
170 sizeof(EVP_ARIA_KEY), \
171 NULL, NULL, NULL, NULL \
172 }; \
173 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
174 { \
175 return &aria_##keylen##_##mode; \
176 }
177
aria_ctr_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)178 static int aria_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
179 const unsigned char *in, size_t len)
180 {
181 int n = EVP_CIPHER_CTX_get_num(ctx);
182 unsigned int num;
183 EVP_ARIA_KEY *dat = EVP_C_DATA(EVP_ARIA_KEY, ctx);
184
185 if (n < 0)
186 return 0;
187 num = (unsigned int)n;
188
189 CRYPTO_ctr128_encrypt(in, out, len, &dat->ks, ctx->iv,
190 EVP_CIPHER_CTX_buf_noconst(ctx), &num,
191 (block128_f)ossl_aria_encrypt);
192 EVP_CIPHER_CTX_set_num(ctx, num);
193 return 1;
194 }
195
196 BLOCK_CIPHER_generic(NID_aria, 128, 1, 16, ctr, ctr, CTR, 0)
197 BLOCK_CIPHER_generic(NID_aria, 192, 1, 16, ctr, ctr, CTR, 0)
198 BLOCK_CIPHER_generic(NID_aria, 256, 1, 16, ctr, ctr, CTR, 0)
199
200 /* Authenticated cipher modes (GCM/CCM) */
201
202 /* increment counter (64-bit int) by 1 */
ctr64_inc(unsigned char * counter)203 static void ctr64_inc(unsigned char *counter)
204 {
205 int n = 8;
206 unsigned char c;
207
208 do {
209 --n;
210 c = counter[n];
211 ++c;
212 counter[n] = c;
213 if (c)
214 return;
215 } while (n);
216 }
217
aria_gcm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)218 static int aria_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
219 const unsigned char *iv, int enc)
220 {
221 int ret;
222 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
223
224 if (!iv && !key)
225 return 1;
226 if (key) {
227 ret = ossl_aria_set_encrypt_key(key,
228 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
229 &gctx->ks.ks);
230 CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks,
231 (block128_f)ossl_aria_encrypt);
232 if (ret < 0) {
233 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
234 return 0;
235 }
236
237 /*
238 * If we have an iv can set it directly, otherwise use saved IV.
239 */
240 if (iv == NULL && gctx->iv_set)
241 iv = gctx->iv;
242 if (iv) {
243 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
244 gctx->iv_set = 1;
245 }
246 gctx->key_set = 1;
247 } else {
248 /* If key set use IV, otherwise copy */
249 if (gctx->key_set)
250 CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen);
251 else
252 memcpy(gctx->iv, iv, gctx->ivlen);
253 gctx->iv_set = 1;
254 gctx->iv_gen = 0;
255 }
256 return 1;
257 }
258
aria_gcm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)259 static int aria_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
260 {
261 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, c);
262
263 switch (type) {
264 case EVP_CTRL_INIT:
265 gctx->key_set = 0;
266 gctx->iv_set = 0;
267 gctx->ivlen = EVP_CIPHER_get_iv_length(c->cipher);
268 gctx->iv = c->iv;
269 gctx->taglen = -1;
270 gctx->iv_gen = 0;
271 gctx->tls_aad_len = -1;
272 return 1;
273
274 case EVP_CTRL_GET_IVLEN:
275 *(int *)ptr = gctx->ivlen;
276 return 1;
277
278 case EVP_CTRL_AEAD_SET_IVLEN:
279 if (arg <= 0)
280 return 0;
281 /* Allocate memory for IV if needed */
282 if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) {
283 if (gctx->iv != c->iv)
284 OPENSSL_free(gctx->iv);
285 if ((gctx->iv = OPENSSL_malloc(arg)) == NULL)
286 return 0;
287 }
288 gctx->ivlen = arg;
289 return 1;
290
291 case EVP_CTRL_AEAD_SET_TAG:
292 if (arg <= 0 || arg > 16 || EVP_CIPHER_CTX_is_encrypting(c))
293 return 0;
294 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
295 gctx->taglen = arg;
296 return 1;
297
298 case EVP_CTRL_AEAD_GET_TAG:
299 if (arg <= 0 || arg > 16 || !EVP_CIPHER_CTX_is_encrypting(c)
300 || gctx->taglen < 0)
301 return 0;
302 memcpy(ptr, EVP_CIPHER_CTX_buf_noconst(c), arg);
303 return 1;
304
305 case EVP_CTRL_GCM_SET_IV_FIXED:
306 /* Special case: -1 length restores whole IV */
307 if (arg == -1) {
308 memcpy(gctx->iv, ptr, gctx->ivlen);
309 gctx->iv_gen = 1;
310 return 1;
311 }
312 /*
313 * Fixed field must be at least 4 bytes and invocation field at least
314 * 8.
315 */
316 if ((arg < 4) || (gctx->ivlen - arg) < 8)
317 return 0;
318 if (arg)
319 memcpy(gctx->iv, ptr, arg);
320 if (EVP_CIPHER_CTX_is_encrypting(c)
321 && RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0)
322 return 0;
323 gctx->iv_gen = 1;
324 return 1;
325
326 case EVP_CTRL_GCM_IV_GEN:
327 if (gctx->iv_gen == 0 || gctx->key_set == 0)
328 return 0;
329 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
330 if (arg <= 0 || arg > gctx->ivlen)
331 arg = gctx->ivlen;
332 memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg);
333 /*
334 * Invocation field will be at least 8 bytes in size and so no need
335 * to check wrap around or increment more than last 8 bytes.
336 */
337 ctr64_inc(gctx->iv + gctx->ivlen - 8);
338 gctx->iv_set = 1;
339 return 1;
340
341 case EVP_CTRL_GCM_SET_IV_INV:
342 if (gctx->iv_gen == 0 || gctx->key_set == 0
343 || EVP_CIPHER_CTX_is_encrypting(c))
344 return 0;
345 memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg);
346 CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen);
347 gctx->iv_set = 1;
348 return 1;
349
350 case EVP_CTRL_AEAD_TLS1_AAD:
351 /* Save the AAD for later use */
352 if (arg != EVP_AEAD_TLS1_AAD_LEN)
353 return 0;
354 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
355 gctx->tls_aad_len = arg;
356 {
357 unsigned int len = EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
358 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
359 /* Correct length for explicit IV */
360 if (len < EVP_GCM_TLS_EXPLICIT_IV_LEN)
361 return 0;
362 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN;
363 /* If decrypting correct for tag too */
364 if (!EVP_CIPHER_CTX_is_encrypting(c)) {
365 if (len < EVP_GCM_TLS_TAG_LEN)
366 return 0;
367 len -= EVP_GCM_TLS_TAG_LEN;
368 }
369 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
370 EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
371 }
372 /* Extra padding: tag appended to record */
373 return EVP_GCM_TLS_TAG_LEN;
374
375 case EVP_CTRL_COPY: {
376 EVP_CIPHER_CTX *out = ptr;
377 EVP_ARIA_GCM_CTX *gctx_out = EVP_C_DATA(EVP_ARIA_GCM_CTX, out);
378 if (gctx->gcm.key) {
379 if (gctx->gcm.key != &gctx->ks)
380 return 0;
381 gctx_out->gcm.key = &gctx_out->ks;
382 }
383 if (gctx->iv == c->iv)
384 gctx_out->iv = out->iv;
385 else {
386 if ((gctx_out->iv = OPENSSL_malloc(gctx->ivlen)) == NULL)
387 return 0;
388 memcpy(gctx_out->iv, gctx->iv, gctx->ivlen);
389 }
390 return 1;
391 }
392
393 default:
394 return -1;
395 }
396 }
397
aria_gcm_tls_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)398 static int aria_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
399 const unsigned char *in, size_t len)
400 {
401 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
402 int rv = -1;
403
404 /* Encrypt/decrypt must be performed in place */
405 if (out != in
406 || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN))
407 return -1;
408 /*
409 * Set IV from start of buffer or generate IV and write to start of
410 * buffer.
411 */
412 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CIPHER_CTX_is_encrypting(ctx) ? EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV,
413 EVP_GCM_TLS_EXPLICIT_IV_LEN, out)
414 <= 0)
415 goto err;
416 /* Use saved AAD */
417 if (CRYPTO_gcm128_aad(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
418 gctx->tls_aad_len))
419 goto err;
420 /* Fix buffer and length to point to payload */
421 in += EVP_GCM_TLS_EXPLICIT_IV_LEN;
422 out += EVP_GCM_TLS_EXPLICIT_IV_LEN;
423 len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
424 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
425 /* Encrypt payload */
426 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
427 goto err;
428 out += len;
429 /* Finally write tag */
430 CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN);
431 rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN;
432 } else {
433 /* Decrypt */
434 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
435 goto err;
436 /* Retrieve tag */
437 CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx),
438 EVP_GCM_TLS_TAG_LEN);
439 /* If tag mismatch wipe buffer */
440 if (CRYPTO_memcmp(EVP_CIPHER_CTX_buf_noconst(ctx), in + len,
441 EVP_GCM_TLS_TAG_LEN)) {
442 OPENSSL_cleanse(out, len);
443 goto err;
444 }
445 rv = len;
446 }
447
448 err:
449 gctx->iv_set = 0;
450 gctx->tls_aad_len = -1;
451 return rv;
452 }
453
aria_gcm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)454 static int aria_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
455 const unsigned char *in, size_t len)
456 {
457 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
458
459 /* If not set up, return error */
460 if (!gctx->key_set)
461 return -1;
462
463 if (gctx->tls_aad_len >= 0)
464 return aria_gcm_tls_cipher(ctx, out, in, len);
465
466 if (!gctx->iv_set)
467 return -1;
468 if (in) {
469 if (out == NULL) {
470 if (CRYPTO_gcm128_aad(&gctx->gcm, in, len))
471 return -1;
472 } else if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
473 if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len))
474 return -1;
475 } else {
476 if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len))
477 return -1;
478 }
479 return len;
480 }
481 if (!EVP_CIPHER_CTX_is_encrypting(ctx)) {
482 if (gctx->taglen < 0)
483 return -1;
484 if (CRYPTO_gcm128_finish(&gctx->gcm,
485 EVP_CIPHER_CTX_buf_noconst(ctx),
486 gctx->taglen)
487 != 0)
488 return -1;
489 gctx->iv_set = 0;
490 return 0;
491 }
492 CRYPTO_gcm128_tag(&gctx->gcm, EVP_CIPHER_CTX_buf_noconst(ctx), 16);
493 gctx->taglen = 16;
494 /* Don't reuse the IV */
495 gctx->iv_set = 0;
496 return 0;
497 }
498
aria_gcm_cleanup(EVP_CIPHER_CTX * ctx)499 static int aria_gcm_cleanup(EVP_CIPHER_CTX *ctx)
500 {
501 EVP_ARIA_GCM_CTX *gctx = EVP_C_DATA(EVP_ARIA_GCM_CTX, ctx);
502
503 if (gctx->iv != ctx->iv)
504 OPENSSL_free(gctx->iv);
505
506 return 1;
507 }
508
aria_ccm_init_key(EVP_CIPHER_CTX * ctx,const unsigned char * key,const unsigned char * iv,int enc)509 static int aria_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
510 const unsigned char *iv, int enc)
511 {
512 int ret;
513 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
514
515 if (!iv && !key)
516 return 1;
517
518 if (key) {
519 ret = ossl_aria_set_encrypt_key(key,
520 EVP_CIPHER_CTX_get_key_length(ctx) * 8,
521 &cctx->ks.ks);
522 CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
523 &cctx->ks, (block128_f)ossl_aria_encrypt);
524 if (ret < 0) {
525 ERR_raise(ERR_LIB_EVP, EVP_R_ARIA_KEY_SETUP_FAILED);
526 return 0;
527 }
528 cctx->str = NULL;
529 cctx->key_set = 1;
530 }
531 if (iv) {
532 memcpy(ctx->iv, iv, 15 - cctx->L);
533 cctx->iv_set = 1;
534 }
535 return 1;
536 }
537
aria_ccm_ctrl(EVP_CIPHER_CTX * c,int type,int arg,void * ptr)538 static int aria_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr)
539 {
540 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, c);
541
542 switch (type) {
543 case EVP_CTRL_INIT:
544 cctx->key_set = 0;
545 cctx->iv_set = 0;
546 cctx->L = 8;
547 cctx->M = 12;
548 cctx->tag_set = 0;
549 cctx->len_set = 0;
550 cctx->tls_aad_len = -1;
551 return 1;
552
553 case EVP_CTRL_GET_IVLEN:
554 *(int *)ptr = 15 - cctx->L;
555 return 1;
556
557 case EVP_CTRL_AEAD_TLS1_AAD:
558 /* Save the AAD for later use */
559 if (arg != EVP_AEAD_TLS1_AAD_LEN)
560 return 0;
561 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
562 cctx->tls_aad_len = arg;
563 {
564 uint16_t len = EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] << 8
565 | EVP_CIPHER_CTX_buf_noconst(c)[arg - 1];
566 /* Correct length for explicit IV */
567 if (len < EVP_CCM_TLS_EXPLICIT_IV_LEN)
568 return 0;
569 len -= EVP_CCM_TLS_EXPLICIT_IV_LEN;
570 /* If decrypting correct for tag too */
571 if (!EVP_CIPHER_CTX_is_encrypting(c)) {
572 if (len < cctx->M)
573 return 0;
574 len -= cctx->M;
575 }
576 EVP_CIPHER_CTX_buf_noconst(c)[arg - 2] = len >> 8;
577 EVP_CIPHER_CTX_buf_noconst(c)[arg - 1] = len & 0xff;
578 }
579 /* Extra padding: tag appended to record */
580 return cctx->M;
581
582 case EVP_CTRL_CCM_SET_IV_FIXED:
583 /* Sanity check length */
584 if (arg != EVP_CCM_TLS_FIXED_IV_LEN)
585 return 0;
586 /* Just copy to first part of IV */
587 memcpy(c->iv, ptr, arg);
588 return 1;
589
590 case EVP_CTRL_AEAD_SET_IVLEN:
591 arg = 15 - arg;
592 /* fall through */
593 case EVP_CTRL_CCM_SET_L:
594 if (arg < 2 || arg > 8)
595 return 0;
596 cctx->L = arg;
597 return 1;
598 case EVP_CTRL_AEAD_SET_TAG:
599 if ((arg & 1) || arg < 4 || arg > 16)
600 return 0;
601 if (EVP_CIPHER_CTX_is_encrypting(c) && ptr)
602 return 0;
603 if (ptr) {
604 cctx->tag_set = 1;
605 memcpy(EVP_CIPHER_CTX_buf_noconst(c), ptr, arg);
606 }
607 cctx->M = arg;
608 return 1;
609
610 case EVP_CTRL_AEAD_GET_TAG:
611 if (!EVP_CIPHER_CTX_is_encrypting(c) || !cctx->tag_set)
612 return 0;
613 if (!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg))
614 return 0;
615 cctx->tag_set = 0;
616 cctx->iv_set = 0;
617 cctx->len_set = 0;
618 return 1;
619
620 case EVP_CTRL_COPY: {
621 EVP_CIPHER_CTX *out = ptr;
622 EVP_ARIA_CCM_CTX *cctx_out = EVP_C_DATA(EVP_ARIA_CCM_CTX, out);
623 if (cctx->ccm.key) {
624 if (cctx->ccm.key != &cctx->ks)
625 return 0;
626 cctx_out->ccm.key = &cctx_out->ks;
627 }
628 return 1;
629 }
630
631 default:
632 return -1;
633 }
634 }
635
aria_ccm_tls_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)636 static int aria_ccm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
637 const unsigned char *in, size_t len)
638 {
639 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
640 CCM128_CONTEXT *ccm = &cctx->ccm;
641
642 /* Encrypt/decrypt must be performed in place */
643 if (out != in || len < (EVP_CCM_TLS_EXPLICIT_IV_LEN + (size_t)cctx->M))
644 return -1;
645 /* If encrypting set explicit IV from sequence number (start of AAD) */
646 if (EVP_CIPHER_CTX_is_encrypting(ctx))
647 memcpy(out, EVP_CIPHER_CTX_buf_noconst(ctx),
648 EVP_CCM_TLS_EXPLICIT_IV_LEN);
649 /* Get rest of IV from explicit IV */
650 memcpy(ctx->iv + EVP_CCM_TLS_FIXED_IV_LEN, in,
651 EVP_CCM_TLS_EXPLICIT_IV_LEN);
652 /* Correct length value */
653 len -= EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
654 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,
655 len))
656 return -1;
657 /* Use saved AAD */
658 CRYPTO_ccm128_aad(ccm, EVP_CIPHER_CTX_buf_noconst(ctx),
659 cctx->tls_aad_len);
660 /* Fix buffer to point to payload */
661 in += EVP_CCM_TLS_EXPLICIT_IV_LEN;
662 out += EVP_CCM_TLS_EXPLICIT_IV_LEN;
663 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
664 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
665 : CRYPTO_ccm128_encrypt(ccm, in, out, len))
666 return -1;
667 if (!CRYPTO_ccm128_tag(ccm, out + len, cctx->M))
668 return -1;
669 return len + EVP_CCM_TLS_EXPLICIT_IV_LEN + cctx->M;
670 } else {
671 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, cctx->str)
672 : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
673 unsigned char tag[16];
674 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
675 if (!CRYPTO_memcmp(tag, in + len, cctx->M))
676 return len;
677 }
678 }
679 OPENSSL_cleanse(out, len);
680 return -1;
681 }
682 }
683
aria_ccm_cipher(EVP_CIPHER_CTX * ctx,unsigned char * out,const unsigned char * in,size_t len)684 static int aria_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
685 const unsigned char *in, size_t len)
686 {
687 EVP_ARIA_CCM_CTX *cctx = EVP_C_DATA(EVP_ARIA_CCM_CTX, ctx);
688 CCM128_CONTEXT *ccm = &cctx->ccm;
689
690 /* If not set up, return error */
691 if (!cctx->key_set)
692 return -1;
693
694 if (cctx->tls_aad_len >= 0)
695 return aria_ccm_tls_cipher(ctx, out, in, len);
696
697 /* EVP_*Final() doesn't return any data */
698 if (in == NULL && out != NULL)
699 return 0;
700
701 if (!cctx->iv_set)
702 return -1;
703
704 if (!out) {
705 if (!in) {
706 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
707 return -1;
708 cctx->len_set = 1;
709 return len;
710 }
711 /* If have AAD need message length */
712 if (!cctx->len_set && len)
713 return -1;
714 CRYPTO_ccm128_aad(ccm, in, len);
715 return len;
716 }
717
718 /* The tag must be set before actually decrypting data */
719 if (!EVP_CIPHER_CTX_is_encrypting(ctx) && !cctx->tag_set)
720 return -1;
721
722 /* If not set length yet do it */
723 if (!cctx->len_set) {
724 if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len))
725 return -1;
726 cctx->len_set = 1;
727 }
728 if (EVP_CIPHER_CTX_is_encrypting(ctx)) {
729 if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, cctx->str)
730 : CRYPTO_ccm128_encrypt(ccm, in, out, len))
731 return -1;
732 cctx->tag_set = 1;
733 return len;
734 } else {
735 int rv = -1;
736 if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len,
737 cctx->str)
738 : !CRYPTO_ccm128_decrypt(ccm, in, out, len)) {
739 unsigned char tag[16];
740 if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) {
741 if (!CRYPTO_memcmp(tag, EVP_CIPHER_CTX_buf_noconst(ctx),
742 cctx->M))
743 rv = len;
744 }
745 }
746 if (rv == -1)
747 OPENSSL_cleanse(out, len);
748 cctx->iv_set = 0;
749 cctx->tag_set = 0;
750 cctx->len_set = 0;
751 return rv;
752 }
753 }
754
755 #define aria_ccm_cleanup NULL
756
757 #define ARIA_AUTH_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \
758 | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \
759 | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \
760 | EVP_CIPH_CUSTOM_COPY | EVP_CIPH_FLAG_AEAD_CIPHER \
761 | EVP_CIPH_CUSTOM_IV_LENGTH)
762
763 #define BLOCK_CIPHER_aead(keylen, mode, MODE) \
764 static const EVP_CIPHER aria_##keylen##_##mode = { \
765 NID_aria_##keylen##_##mode, \
766 1, keylen / 8, 12, \
767 ARIA_AUTH_FLAGS | EVP_CIPH_##MODE##_MODE, \
768 EVP_ORIG_GLOBAL, \
769 aria_##mode##_init_key, \
770 aria_##mode##_cipher, \
771 aria_##mode##_cleanup, \
772 sizeof(EVP_ARIA_##MODE##_CTX), \
773 NULL, NULL, aria_##mode##_ctrl, NULL \
774 }; \
775 const EVP_CIPHER *EVP_aria_##keylen##_##mode(void) \
776 { \
777 return (EVP_CIPHER *)&aria_##keylen##_##mode; \
778 }
779
780 BLOCK_CIPHER_aead(128, gcm, GCM)
781 BLOCK_CIPHER_aead(192, gcm, GCM)
782 BLOCK_CIPHER_aead(256, gcm, GCM)
783
784 BLOCK_CIPHER_aead(128, ccm, CCM)
785 BLOCK_CIPHER_aead(192, ccm, CCM)
786 BLOCK_CIPHER_aead(256, ccm, CCM)
787
788 #endif
789