1 /*
2 * Copyright 1995-2023 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 <stdio.h>
11 #include "internal/cryptlib.h"
12 #include <openssl/objects.h>
13 #include <openssl/x509.h>
14 #include <openssl/pkcs7.h>
15 #include "crypto/asn1.h"
16 #include "crypto/evp.h"
17 #include "crypto/x509.h" /* for sk_X509_add1_cert() */
18 #include "pk7_local.h"
19
PKCS7_ctrl(PKCS7 * p7,int cmd,long larg,char * parg)20 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
21 {
22 int nid;
23 long ret;
24
25 nid = OBJ_obj2nid(p7->type);
26
27 switch (cmd) {
28 /* NOTE(emilia): does not support detached digested data. */
29 case PKCS7_OP_SET_DETACHED_SIGNATURE:
30 if (nid == NID_pkcs7_signed) {
31 if (p7->d.sign == NULL) {
32 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_CONTENT);
33 ret = 0;
34 break;
35 }
36 ret = p7->detached = (int)larg;
37 if (ret && PKCS7_type_is_data(p7->d.sign->contents)) {
38 ASN1_OCTET_STRING *os;
39 os = p7->d.sign->contents->d.data;
40 ASN1_OCTET_STRING_free(os);
41 p7->d.sign->contents->d.data = NULL;
42 }
43 } else {
44 ERR_raise(ERR_LIB_PKCS7,
45 PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
46 ret = 0;
47 }
48 break;
49 case PKCS7_OP_GET_DETACHED_SIGNATURE:
50 if (nid == NID_pkcs7_signed) {
51 if (p7->d.sign == NULL || p7->d.sign->contents->d.ptr == NULL)
52 ret = 1;
53 else
54 ret = 0;
55
56 p7->detached = ret;
57 } else {
58 ERR_raise(ERR_LIB_PKCS7,
59 PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
60 ret = 0;
61 }
62
63 break;
64 default:
65 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNKNOWN_OPERATION);
66 ret = 0;
67 }
68 return ret;
69 }
70
PKCS7_content_new(PKCS7 * p7,int type)71 int PKCS7_content_new(PKCS7 *p7, int type)
72 {
73 PKCS7 *ret = NULL;
74
75 if ((ret = PKCS7_new()) == NULL)
76 goto err;
77 if (!PKCS7_set_type(ret, type))
78 goto err;
79 if (!PKCS7_set_content(p7, ret))
80 goto err;
81
82 return 1;
83 err:
84 PKCS7_free(ret);
85 return 0;
86 }
87
PKCS7_set_content(PKCS7 * p7,PKCS7 * p7_data)88 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
89 {
90 int i;
91
92 i = OBJ_obj2nid(p7->type);
93 switch (i) {
94 case NID_pkcs7_signed:
95 PKCS7_free(p7->d.sign->contents);
96 p7->d.sign->contents = p7_data;
97 break;
98 case NID_pkcs7_digest:
99 PKCS7_free(p7->d.digest->contents);
100 p7->d.digest->contents = p7_data;
101 break;
102 case NID_pkcs7_data:
103 case NID_pkcs7_enveloped:
104 case NID_pkcs7_signedAndEnveloped:
105 case NID_pkcs7_encrypted:
106 default:
107 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
108 goto err;
109 }
110 return 1;
111 err:
112 return 0;
113 }
114
PKCS7_set_type(PKCS7 * p7,int type)115 int PKCS7_set_type(PKCS7 *p7, int type)
116 {
117 ASN1_OBJECT *obj;
118
119 /*
120 * PKCS7_content_free(p7);
121 */
122 obj = OBJ_nid2obj(type); /* will not fail */
123
124 switch (type) {
125 case NID_pkcs7_signed:
126 p7->type = obj;
127 if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
128 goto err;
129 if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
130 PKCS7_SIGNED_free(p7->d.sign);
131 p7->d.sign = NULL;
132 goto err;
133 }
134 break;
135 case NID_pkcs7_data:
136 p7->type = obj;
137 if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
138 goto err;
139 break;
140 case NID_pkcs7_signedAndEnveloped:
141 p7->type = obj;
142 if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
143 == NULL)
144 goto err;
145 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
146 goto err;
147 p7->d.signed_and_enveloped->enc_data->content_type
148 = OBJ_nid2obj(NID_pkcs7_data);
149 break;
150 case NID_pkcs7_enveloped:
151 p7->type = obj;
152 if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
153 == NULL)
154 goto err;
155 if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
156 goto err;
157 p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
158 break;
159 case NID_pkcs7_encrypted:
160 p7->type = obj;
161 if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
162 == NULL)
163 goto err;
164 if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
165 goto err;
166 p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
167 break;
168
169 case NID_pkcs7_digest:
170 p7->type = obj;
171 if ((p7->d.digest = PKCS7_DIGEST_new())
172 == NULL)
173 goto err;
174 if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
175 goto err;
176 break;
177 default:
178 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
179 goto err;
180 }
181 return 1;
182 err:
183 return 0;
184 }
185
PKCS7_set0_type_other(PKCS7 * p7,int type,ASN1_TYPE * other)186 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
187 {
188 p7->type = OBJ_nid2obj(type);
189 p7->d.other = other;
190 return 1;
191 }
192
PKCS7_add_signer(PKCS7 * p7,PKCS7_SIGNER_INFO * psi)193 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
194 {
195 int i, j;
196 ASN1_OBJECT *obj;
197 X509_ALGOR *alg;
198 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
199 STACK_OF(X509_ALGOR) *md_sk;
200
201 i = OBJ_obj2nid(p7->type);
202 switch (i) {
203 case NID_pkcs7_signed:
204 signer_sk = p7->d.sign->signer_info;
205 md_sk = p7->d.sign->md_algs;
206 break;
207 case NID_pkcs7_signedAndEnveloped:
208 signer_sk = p7->d.signed_and_enveloped->signer_info;
209 md_sk = p7->d.signed_and_enveloped->md_algs;
210 break;
211 default:
212 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
213 return 0;
214 }
215
216 obj = psi->digest_alg->algorithm;
217 /* If the digest is not currently listed, add it */
218 j = 0;
219 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
220 alg = sk_X509_ALGOR_value(md_sk, i);
221 if (OBJ_cmp(obj, alg->algorithm) == 0) {
222 j = 1;
223 break;
224 }
225 }
226 if (!j) { /* we need to add another algorithm */
227 int nid;
228
229 if ((alg = X509_ALGOR_new()) == NULL
230 || (alg->parameter = ASN1_TYPE_new()) == NULL) {
231 X509_ALGOR_free(alg);
232 ERR_raise(ERR_LIB_PKCS7, ERR_R_MALLOC_FAILURE);
233 return 0;
234 }
235 /*
236 * If there is a constant copy of the ASN1 OBJECT in libcrypto, then
237 * use that. Otherwise, use a dynamically duplicated copy
238 */
239 if ((nid = OBJ_obj2nid(obj)) != NID_undef)
240 alg->algorithm = OBJ_nid2obj(nid);
241 else
242 alg->algorithm = OBJ_dup(obj);
243 alg->parameter->type = V_ASN1_NULL;
244 if (alg->algorithm == NULL || !sk_X509_ALGOR_push(md_sk, alg)) {
245 X509_ALGOR_free(alg);
246 return 0;
247 }
248 }
249
250 psi->ctx = ossl_pkcs7_get0_ctx(p7);
251 if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
252 return 0;
253 return 1;
254 }
255
PKCS7_add_certificate(PKCS7 * p7,X509 * x509)256 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
257 {
258 int i;
259 STACK_OF(X509) **sk;
260
261 i = OBJ_obj2nid(p7->type);
262 switch (i) {
263 case NID_pkcs7_signed:
264 sk = &(p7->d.sign->cert);
265 break;
266 case NID_pkcs7_signedAndEnveloped:
267 sk = &(p7->d.signed_and_enveloped->cert);
268 break;
269 default:
270 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
271 return 0;
272 }
273
274 return ossl_x509_add_cert_new(sk, x509, X509_ADD_FLAG_UP_REF);
275 }
276
PKCS7_add_crl(PKCS7 * p7,X509_CRL * crl)277 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
278 {
279 int i;
280 STACK_OF(X509_CRL) **sk;
281
282 i = OBJ_obj2nid(p7->type);
283 switch (i) {
284 case NID_pkcs7_signed:
285 sk = &(p7->d.sign->crl);
286 break;
287 case NID_pkcs7_signedAndEnveloped:
288 sk = &(p7->d.signed_and_enveloped->crl);
289 break;
290 default:
291 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
292 return 0;
293 }
294
295 if (*sk == NULL)
296 *sk = sk_X509_CRL_new_null();
297 if (*sk == NULL) {
298 ERR_raise(ERR_LIB_PKCS7, ERR_R_MALLOC_FAILURE);
299 return 0;
300 }
301
302 X509_CRL_up_ref(crl);
303 if (!sk_X509_CRL_push(*sk, crl)) {
304 X509_CRL_free(crl);
305 return 0;
306 }
307 return 1;
308 }
309
pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO * si,int verify)310 static int pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO *si,
311 int verify)
312 {
313 if (verify == 0) {
314 int snid, hnid;
315 X509_ALGOR *alg1, *alg2;
316 EVP_PKEY *pkey = si->pkey;
317
318 PKCS7_SIGNER_INFO_get0_algs(si, NULL, &alg1, &alg2);
319 if (alg1 == NULL || alg1->algorithm == NULL)
320 return -1;
321 hnid = OBJ_obj2nid(alg1->algorithm);
322 if (hnid == NID_undef)
323 return -1;
324 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_get_id(pkey)))
325 return -1;
326 X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, 0);
327 }
328 return 1;
329 }
330
pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO * si,int verify)331 static int pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO *si, int verify)
332 {
333 if (verify == 0) {
334 X509_ALGOR *alg = NULL;
335
336 PKCS7_SIGNER_INFO_get0_algs(si, NULL, NULL, &alg);
337 if (alg != NULL)
338 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
339 }
340 return 1;
341 }
342
PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO * p7i,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)343 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
344 const EVP_MD *dgst)
345 {
346 int ret;
347
348 /* We now need to add another PKCS7_SIGNER_INFO entry */
349 if (!ASN1_INTEGER_set(p7i->version, 1))
350 goto err;
351 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
352 X509_get_issuer_name(x509)))
353 goto err;
354
355 /*
356 * because ASN1_INTEGER_set is used to set a 'long' we will do things the
357 * ugly way.
358 */
359 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
360 if (!(p7i->issuer_and_serial->serial =
361 ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
362 goto err;
363
364 /* lets keep the pkey around for a while */
365 EVP_PKEY_up_ref(pkey);
366 p7i->pkey = pkey;
367
368 /* Set the algorithms */
369
370 X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_get_type(dgst)),
371 V_ASN1_NULL, NULL);
372
373 if (EVP_PKEY_is_a(pkey, "EC") || EVP_PKEY_is_a(pkey, "DSA"))
374 return pkcs7_ecdsa_or_dsa_sign_verify_setup(p7i, 0);
375 if (EVP_PKEY_is_a(pkey, "RSA"))
376 return pkcs7_rsa_sign_verify_setup(p7i, 0);
377
378 if (pkey->ameth != NULL && pkey->ameth->pkey_ctrl != NULL) {
379 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
380 if (ret > 0)
381 return 1;
382 if (ret != -2) {
383 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_CTRL_FAILURE);
384 return 0;
385 }
386 }
387 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
388 err:
389 return 0;
390 }
391
PKCS7_add_signature(PKCS7 * p7,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)392 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
393 const EVP_MD *dgst)
394 {
395 PKCS7_SIGNER_INFO *si = NULL;
396
397 if (dgst == NULL) {
398 int def_nid;
399 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
400 goto err;
401 dgst = EVP_get_digestbynid(def_nid);
402 if (dgst == NULL) {
403 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_DEFAULT_DIGEST);
404 goto err;
405 }
406 }
407
408 if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
409 goto err;
410 if (PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst) <= 0)
411 goto err;
412 if (!PKCS7_add_signer(p7, si))
413 goto err;
414 return si;
415 err:
416 PKCS7_SIGNER_INFO_free(si);
417 return NULL;
418 }
419
STACK_OF(X509)420 static STACK_OF(X509) *pkcs7_get_signer_certs(const PKCS7 *p7)
421 {
422 if (p7->d.ptr == NULL)
423 return NULL;
424 if (PKCS7_type_is_signed(p7))
425 return p7->d.sign->cert;
426 if (PKCS7_type_is_signedAndEnveloped(p7))
427 return p7->d.signed_and_enveloped->cert;
428 return NULL;
429 }
430
STACK_OF(PKCS7_RECIP_INFO)431 static STACK_OF(PKCS7_RECIP_INFO) *pkcs7_get_recipient_info(const PKCS7 *p7)
432 {
433 if (p7->d.ptr == NULL)
434 return NULL;
435 if (PKCS7_type_is_signedAndEnveloped(p7))
436 return p7->d.signed_and_enveloped->recipientinfo;
437 if (PKCS7_type_is_enveloped(p7))
438 return p7->d.enveloped->recipientinfo;
439 return NULL;
440 }
441
442 /*
443 * Set up the library context into any loaded structure that needs it.
444 * i.e loaded X509 objects.
445 */
ossl_pkcs7_resolve_libctx(PKCS7 * p7)446 void ossl_pkcs7_resolve_libctx(PKCS7 *p7)
447 {
448 int i;
449 const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7);
450 OSSL_LIB_CTX *libctx = ossl_pkcs7_ctx_get0_libctx(ctx);
451 const char *propq = ossl_pkcs7_ctx_get0_propq(ctx);
452 STACK_OF(PKCS7_RECIP_INFO) *rinfos;
453 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
454 STACK_OF(X509) *certs;
455
456 if (ctx == NULL || p7->d.ptr == NULL)
457 return;
458
459 rinfos = pkcs7_get_recipient_info(p7);
460 sinfos = PKCS7_get_signer_info(p7);
461 certs = pkcs7_get_signer_certs(p7);
462
463 for (i = 0; i < sk_X509_num(certs); i++)
464 ossl_x509_set0_libctx(sk_X509_value(certs, i), libctx, propq);
465
466 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rinfos); i++) {
467 PKCS7_RECIP_INFO *ri = sk_PKCS7_RECIP_INFO_value(rinfos, i);
468
469 ossl_x509_set0_libctx(ri->cert, libctx, propq);
470 }
471
472 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
473 PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
474
475 if (si != NULL)
476 si->ctx = ctx;
477 }
478 }
479
ossl_pkcs7_get0_ctx(const PKCS7 * p7)480 const PKCS7_CTX *ossl_pkcs7_get0_ctx(const PKCS7 *p7)
481 {
482 return p7 != NULL ? &p7->ctx : NULL;
483 }
484
ossl_pkcs7_set0_libctx(PKCS7 * p7,OSSL_LIB_CTX * ctx)485 void ossl_pkcs7_set0_libctx(PKCS7 *p7, OSSL_LIB_CTX *ctx)
486 {
487 p7->ctx.libctx = ctx;
488 }
489
ossl_pkcs7_set1_propq(PKCS7 * p7,const char * propq)490 int ossl_pkcs7_set1_propq(PKCS7 *p7, const char *propq)
491 {
492 if (p7->ctx.propq != NULL) {
493 OPENSSL_free(p7->ctx.propq);
494 p7->ctx.propq = NULL;
495 }
496 if (propq != NULL) {
497 p7->ctx.propq = OPENSSL_strdup(propq);
498 if (p7->ctx.propq == NULL) {
499 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
500 return 0;
501 }
502 }
503 return 1;
504 }
505
ossl_pkcs7_ctx_propagate(const PKCS7 * from,PKCS7 * to)506 int ossl_pkcs7_ctx_propagate(const PKCS7 *from, PKCS7 *to)
507 {
508 ossl_pkcs7_set0_libctx(to, from->ctx.libctx);
509 if (!ossl_pkcs7_set1_propq(to, from->ctx.propq))
510 return 0;
511
512 ossl_pkcs7_resolve_libctx(to);
513 return 1;
514 }
515
ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX * ctx)516 OSSL_LIB_CTX *ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX *ctx)
517 {
518 return ctx != NULL ? ctx->libctx : NULL;
519 }
ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX * ctx)520 const char *ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX *ctx)
521 {
522 return ctx != NULL ? ctx->propq : NULL;
523 }
524
PKCS7_set_digest(PKCS7 * p7,const EVP_MD * md)525 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
526 {
527 if (PKCS7_type_is_digest(p7)) {
528 if ((p7->d.digest->md->parameter = ASN1_TYPE_new()) == NULL) {
529 ERR_raise(ERR_LIB_PKCS7, ERR_R_MALLOC_FAILURE);
530 return 0;
531 }
532 p7->d.digest->md->parameter->type = V_ASN1_NULL;
533 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
534 return 1;
535 }
536
537 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
538 return 1;
539 }
540
STACK_OF(PKCS7_SIGNER_INFO)541 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
542 {
543 if (p7 == NULL || p7->d.ptr == NULL)
544 return NULL;
545 if (PKCS7_type_is_signed(p7)) {
546 return p7->d.sign->signer_info;
547 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
548 return p7->d.signed_and_enveloped->signer_info;
549 } else
550 return NULL;
551 }
552
PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO * si,EVP_PKEY ** pk,X509_ALGOR ** pdig,X509_ALGOR ** psig)553 void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
554 X509_ALGOR **pdig, X509_ALGOR **psig)
555 {
556 if (pk)
557 *pk = si->pkey;
558 if (pdig)
559 *pdig = si->digest_alg;
560 if (psig)
561 *psig = si->digest_enc_alg;
562 }
563
PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO * ri,X509_ALGOR ** penc)564 void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
565 {
566 if (penc)
567 *penc = ri->key_enc_algor;
568 }
569
PKCS7_add_recipient(PKCS7 * p7,X509 * x509)570 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
571 {
572 PKCS7_RECIP_INFO *ri;
573
574 if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
575 goto err;
576 if (PKCS7_RECIP_INFO_set(ri, x509) <= 0)
577 goto err;
578 if (!PKCS7_add_recipient_info(p7, ri))
579 goto err;
580 ri->ctx = ossl_pkcs7_get0_ctx(p7);
581 return ri;
582 err:
583 PKCS7_RECIP_INFO_free(ri);
584 return NULL;
585 }
586
PKCS7_add_recipient_info(PKCS7 * p7,PKCS7_RECIP_INFO * ri)587 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
588 {
589 int i;
590 STACK_OF(PKCS7_RECIP_INFO) *sk;
591
592 i = OBJ_obj2nid(p7->type);
593 switch (i) {
594 case NID_pkcs7_signedAndEnveloped:
595 sk = p7->d.signed_and_enveloped->recipientinfo;
596 break;
597 case NID_pkcs7_enveloped:
598 sk = p7->d.enveloped->recipientinfo;
599 break;
600 default:
601 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
602 return 0;
603 }
604
605 if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
606 return 0;
607 return 1;
608 }
609
pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO * ri,int decrypt)610 static int pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO *ri, int decrypt)
611 {
612 X509_ALGOR *alg = NULL;
613
614 if (decrypt == 0) {
615 PKCS7_RECIP_INFO_get0_alg(ri, &alg);
616 if (alg != NULL)
617 X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption), V_ASN1_NULL, 0);
618 }
619 return 1;
620 }
621
PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO * p7i,X509 * x509)622 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
623 {
624 int ret;
625 EVP_PKEY *pkey = NULL;
626 if (!ASN1_INTEGER_set(p7i->version, 0))
627 return 0;
628 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
629 X509_get_issuer_name(x509)))
630 return 0;
631
632 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
633 if (!(p7i->issuer_and_serial->serial =
634 ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
635 return 0;
636
637 pkey = X509_get0_pubkey(x509);
638 if (pkey == NULL)
639 return 0;
640
641 if (EVP_PKEY_is_a(pkey, "RSA-PSS"))
642 return -2;
643 if (EVP_PKEY_is_a(pkey, "RSA")) {
644 if (pkcs7_rsa_encrypt_decrypt_setup(p7i, 0) <= 0)
645 goto err;
646 goto finished;
647 }
648
649 if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL) {
650 ERR_raise(ERR_LIB_PKCS7,
651 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
652 goto err;
653 }
654
655 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
656 if (ret == -2) {
657 ERR_raise(ERR_LIB_PKCS7,
658 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
659 goto err;
660 }
661 if (ret <= 0) {
662 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_ENCRYPTION_CTRL_FAILURE);
663 goto err;
664 }
665 finished:
666 X509_up_ref(x509);
667 p7i->cert = x509;
668
669 return 1;
670
671 err:
672 return 0;
673 }
674
PKCS7_cert_from_signer_info(PKCS7 * p7,PKCS7_SIGNER_INFO * si)675 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
676 {
677 if (PKCS7_type_is_signed(p7))
678 return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
679 si->issuer_and_serial->issuer,
680 si->
681 issuer_and_serial->serial));
682 else
683 return NULL;
684 }
685
PKCS7_set_cipher(PKCS7 * p7,const EVP_CIPHER * cipher)686 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
687 {
688 int i;
689 PKCS7_ENC_CONTENT *ec;
690
691 i = OBJ_obj2nid(p7->type);
692 switch (i) {
693 case NID_pkcs7_signedAndEnveloped:
694 ec = p7->d.signed_and_enveloped->enc_data;
695 break;
696 case NID_pkcs7_enveloped:
697 ec = p7->d.enveloped->enc_data;
698 break;
699 default:
700 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
701 return 0;
702 }
703
704 /* Check cipher OID exists and has data in it */
705 i = EVP_CIPHER_get_type(cipher);
706 if (i == NID_undef) {
707 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
708 return 0;
709 }
710
711 ec->cipher = cipher;
712 ec->ctx = ossl_pkcs7_get0_ctx(p7);
713 return 1;
714 }
715
716 /* unfortunately cannot constify BIO_new_NDEF() due to this and CMS_stream() */
PKCS7_stream(unsigned char *** boundary,PKCS7 * p7)717 int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
718 {
719 ASN1_OCTET_STRING *os = NULL;
720
721 switch (OBJ_obj2nid(p7->type)) {
722 case NID_pkcs7_data:
723 os = p7->d.data;
724 break;
725
726 case NID_pkcs7_signedAndEnveloped:
727 os = p7->d.signed_and_enveloped->enc_data->enc_data;
728 if (os == NULL) {
729 os = ASN1_OCTET_STRING_new();
730 p7->d.signed_and_enveloped->enc_data->enc_data = os;
731 }
732 break;
733
734 case NID_pkcs7_enveloped:
735 os = p7->d.enveloped->enc_data->enc_data;
736 if (os == NULL) {
737 os = ASN1_OCTET_STRING_new();
738 p7->d.enveloped->enc_data->enc_data = os;
739 }
740 break;
741
742 case NID_pkcs7_signed:
743 os = p7->d.sign->contents->d.data;
744 break;
745
746 default:
747 os = NULL;
748 break;
749 }
750
751 if (os == NULL)
752 return 0;
753
754 os->flags |= ASN1_STRING_FLAG_NDEF;
755 *boundary = &os->data;
756
757 return 1;
758 }
759