1 /*
2 * Copyright 1995-2026 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 <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 == NULL
52 || p7->d.sign->contents->d.ptr == NULL)
53 ret = 1;
54 else
55 ret = 0;
56
57 p7->detached = ret;
58 } else {
59 ERR_raise(ERR_LIB_PKCS7,
60 PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
61 ret = 0;
62 }
63
64 break;
65 default:
66 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNKNOWN_OPERATION);
67 ret = 0;
68 }
69 return ret;
70 }
71
PKCS7_content_new(PKCS7 * p7,int type)72 int PKCS7_content_new(PKCS7 *p7, int type)
73 {
74 PKCS7 *ret = NULL;
75
76 if ((ret = PKCS7_new()) == NULL)
77 goto err;
78 if (!PKCS7_set_type(ret, type))
79 goto err;
80 if (!PKCS7_set_content(p7, ret))
81 goto err;
82
83 return 1;
84 err:
85 PKCS7_free(ret);
86 return 0;
87 }
88
PKCS7_set_content(PKCS7 * p7,PKCS7 * p7_data)89 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
90 {
91 int i;
92
93 i = OBJ_obj2nid(p7->type);
94 switch (i) {
95 case NID_pkcs7_signed:
96 PKCS7_free(p7->d.sign->contents);
97 p7->d.sign->contents = p7_data;
98 break;
99 case NID_pkcs7_digest:
100 PKCS7_free(p7->d.digest->contents);
101 p7->d.digest->contents = p7_data;
102 break;
103 case NID_pkcs7_data:
104 case NID_pkcs7_enveloped:
105 case NID_pkcs7_signedAndEnveloped:
106 case NID_pkcs7_encrypted:
107 default:
108 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
109 goto err;
110 }
111 return 1;
112 err:
113 return 0;
114 }
115
PKCS7_set_type(PKCS7 * p7,int type)116 int PKCS7_set_type(PKCS7 *p7, int type)
117 {
118 ASN1_OBJECT *obj;
119
120 /*
121 * PKCS7_content_free(p7);
122 */
123 obj = OBJ_nid2obj(type); /* will not fail */
124
125 switch (type) {
126 case NID_pkcs7_signed:
127 p7->type = obj;
128 if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL)
129 goto err;
130 if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) {
131 PKCS7_SIGNED_free(p7->d.sign);
132 p7->d.sign = NULL;
133 goto err;
134 }
135 break;
136 case NID_pkcs7_data:
137 p7->type = obj;
138 if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL)
139 goto err;
140 break;
141 case NID_pkcs7_signedAndEnveloped:
142 p7->type = obj;
143 if ((p7->d.signed_and_enveloped = PKCS7_SIGN_ENVELOPE_new())
144 == NULL)
145 goto err;
146 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1))
147 goto err;
148 p7->d.signed_and_enveloped->enc_data->content_type
149 = OBJ_nid2obj(NID_pkcs7_data);
150 break;
151 case NID_pkcs7_enveloped:
152 p7->type = obj;
153 if ((p7->d.enveloped = PKCS7_ENVELOPE_new())
154 == NULL)
155 goto err;
156 if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0))
157 goto err;
158 p7->d.enveloped->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
159 break;
160 case NID_pkcs7_encrypted:
161 p7->type = obj;
162 if ((p7->d.encrypted = PKCS7_ENCRYPT_new())
163 == NULL)
164 goto err;
165 if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0))
166 goto err;
167 p7->d.encrypted->enc_data->content_type = OBJ_nid2obj(NID_pkcs7_data);
168 break;
169
170 case NID_pkcs7_digest:
171 p7->type = obj;
172 if ((p7->d.digest = PKCS7_DIGEST_new())
173 == NULL)
174 goto err;
175 if (!ASN1_INTEGER_set(p7->d.digest->version, 0))
176 goto err;
177 break;
178 default:
179 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
180 goto err;
181 }
182 return 1;
183 err:
184 return 0;
185 }
186
PKCS7_set0_type_other(PKCS7 * p7,int type,ASN1_TYPE * other)187 int PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other)
188 {
189 p7->type = OBJ_nid2obj(type);
190 p7->d.other = other;
191 return 1;
192 }
193
PKCS7_add_signer(PKCS7 * p7,PKCS7_SIGNER_INFO * psi)194 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
195 {
196 int i, j;
197 ASN1_OBJECT *obj;
198 X509_ALGOR *alg;
199 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
200 STACK_OF(X509_ALGOR) *md_sk;
201
202 i = OBJ_obj2nid(p7->type);
203 switch (i) {
204 case NID_pkcs7_signed:
205 signer_sk = p7->d.sign->signer_info;
206 md_sk = p7->d.sign->md_algs;
207 break;
208 case NID_pkcs7_signedAndEnveloped:
209 signer_sk = p7->d.signed_and_enveloped->signer_info;
210 md_sk = p7->d.signed_and_enveloped->md_algs;
211 break;
212 default:
213 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
214 return 0;
215 }
216
217 obj = psi->digest_alg->algorithm;
218 /* If the digest is not currently listed, add it */
219 j = 0;
220 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) {
221 alg = sk_X509_ALGOR_value(md_sk, i);
222 if (OBJ_cmp(obj, alg->algorithm) == 0) {
223 j = 1;
224 break;
225 }
226 }
227 if (!j) { /* we need to add another algorithm */
228 int nid;
229
230 if ((alg = X509_ALGOR_new()) == NULL
231 || (alg->parameter = ASN1_TYPE_new()) == NULL) {
232 X509_ALGOR_free(alg);
233 ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
234 return 0;
235 }
236 /*
237 * If there is a constant copy of the ASN1 OBJECT in libcrypto, then
238 * use that. Otherwise, use a dynamically duplicated copy
239 */
240 if ((nid = OBJ_obj2nid(obj)) != NID_undef)
241 alg->algorithm = OBJ_nid2obj(nid);
242 else
243 alg->algorithm = OBJ_dup(obj);
244 alg->parameter->type = V_ASN1_NULL;
245 if (alg->algorithm == NULL || !sk_X509_ALGOR_push(md_sk, alg)) {
246 X509_ALGOR_free(alg);
247 return 0;
248 }
249 }
250
251 psi->ctx = ossl_pkcs7_get0_ctx(p7);
252 if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi))
253 return 0;
254 return 1;
255 }
256
PKCS7_add_certificate(PKCS7 * p7,X509 * x509)257 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
258 {
259 int i;
260 STACK_OF(X509) **sk;
261
262 i = OBJ_obj2nid(p7->type);
263 switch (i) {
264 case NID_pkcs7_signed:
265 sk = &(p7->d.sign->cert);
266 break;
267 case NID_pkcs7_signedAndEnveloped:
268 sk = &(p7->d.signed_and_enveloped->cert);
269 break;
270 default:
271 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
272 return 0;
273 }
274
275 return ossl_x509_add_cert_new(sk, x509, X509_ADD_FLAG_UP_REF);
276 }
277
PKCS7_add_crl(PKCS7 * p7,X509_CRL * crl)278 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
279 {
280 int i;
281 STACK_OF(X509_CRL) **sk;
282
283 i = OBJ_obj2nid(p7->type);
284 switch (i) {
285 case NID_pkcs7_signed:
286 sk = &(p7->d.sign->crl);
287 break;
288 case NID_pkcs7_signedAndEnveloped:
289 sk = &(p7->d.signed_and_enveloped->crl);
290 break;
291 default:
292 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
293 return 0;
294 }
295
296 if (*sk == NULL)
297 *sk = sk_X509_CRL_new_null();
298 if (*sk == NULL) {
299 ERR_raise(ERR_LIB_PKCS7, ERR_R_CRYPTO_LIB);
300 return 0;
301 }
302
303 if (!X509_CRL_up_ref(crl))
304 return 0;
305 if (!sk_X509_CRL_push(*sk, crl)) {
306 X509_CRL_free(crl);
307 return 0;
308 }
309 return 1;
310 }
311
pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO * si,int verify)312 static int pkcs7_ecdsa_or_dsa_sign_verify_setup(PKCS7_SIGNER_INFO *si,
313 int verify)
314 {
315 if (!verify) {
316 int snid, hnid;
317 X509_ALGOR *alg1, *alg2;
318 EVP_PKEY *pkey = si->pkey;
319
320 PKCS7_SIGNER_INFO_get0_algs(si, NULL, &alg1, &alg2);
321 if (alg1 == NULL || alg1->algorithm == NULL)
322 return -1;
323 hnid = OBJ_obj2nid(alg1->algorithm);
324 if (hnid == NID_undef)
325 return -1;
326 if (!OBJ_find_sigid_by_algs(&snid, hnid, EVP_PKEY_get_id(pkey)))
327 return -1;
328 return X509_ALGOR_set0(alg2, OBJ_nid2obj(snid), V_ASN1_UNDEF, NULL);
329 }
330 return 1;
331 }
332
pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO * si,int verify)333 static int pkcs7_rsa_sign_verify_setup(PKCS7_SIGNER_INFO *si, int verify)
334 {
335 if (!verify) {
336 X509_ALGOR *alg = NULL;
337
338 PKCS7_SIGNER_INFO_get0_algs(si, NULL, NULL, &alg);
339 if (alg != NULL)
340 return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
341 V_ASN1_NULL, NULL);
342 }
343 return 1;
344 }
345
PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO * p7i,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)346 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
347 const EVP_MD *dgst)
348 {
349 int ret;
350
351 /* We now need to add another PKCS7_SIGNER_INFO entry */
352 if (!ASN1_INTEGER_set(p7i->version, 1))
353 return 0;
354 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
355 X509_get_issuer_name(x509)))
356 return 0;
357
358 /*
359 * because ASN1_INTEGER_set is used to set a 'long' we will do things the
360 * ugly way.
361 */
362 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
363 if (!(p7i->issuer_and_serial->serial = ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
364 return 0;
365
366 /* lets keep the pkey around for a while */
367 if (!EVP_PKEY_up_ref(pkey))
368 return 0;
369
370 p7i->pkey = pkey;
371
372 /* Set the algorithms */
373
374 if (!X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_get_type(dgst)),
375 V_ASN1_NULL, NULL))
376 return 0;
377
378 if (EVP_PKEY_is_a(pkey, "EC") || EVP_PKEY_is_a(pkey, "DSA"))
379 return pkcs7_ecdsa_or_dsa_sign_verify_setup(p7i, 0);
380 if (EVP_PKEY_is_a(pkey, "RSA"))
381 return pkcs7_rsa_sign_verify_setup(p7i, 0);
382
383 if (pkey->ameth != NULL && pkey->ameth->pkey_ctrl != NULL) {
384 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 0, p7i);
385 if (ret > 0)
386 return 1;
387 if (ret != -2) {
388 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_CTRL_FAILURE);
389 return 0;
390 }
391 }
392 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
393 return 0;
394 }
395
PKCS7_add_signature(PKCS7 * p7,X509 * x509,EVP_PKEY * pkey,const EVP_MD * dgst)396 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
397 const EVP_MD *dgst)
398 {
399 PKCS7_SIGNER_INFO *si = NULL;
400
401 if (dgst == NULL) {
402 int def_nid;
403 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0)
404 goto err;
405 dgst = EVP_get_digestbynid(def_nid);
406 if (dgst == NULL) {
407 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_DEFAULT_DIGEST);
408 goto err;
409 }
410 }
411
412 if ((si = PKCS7_SIGNER_INFO_new()) == NULL)
413 goto err;
414 if (PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst) <= 0)
415 goto err;
416 if (!PKCS7_add_signer(p7, si))
417 goto err;
418 return si;
419 err:
420 PKCS7_SIGNER_INFO_free(si);
421 return NULL;
422 }
423
STACK_OF(X509)424 STACK_OF(X509) *pkcs7_get0_certificates(const PKCS7 *p7)
425 {
426 if (p7->d.ptr == NULL)
427 return NULL;
428 if (PKCS7_type_is_signed(p7))
429 return p7->d.sign->cert;
430 if (PKCS7_type_is_signedAndEnveloped(p7))
431 return p7->d.signed_and_enveloped->cert;
432 return NULL;
433 }
434
STACK_OF(PKCS7_RECIP_INFO)435 static STACK_OF(PKCS7_RECIP_INFO) *pkcs7_get_recipient_info(const PKCS7 *p7)
436 {
437 if (p7->d.ptr == NULL)
438 return NULL;
439 if (PKCS7_type_is_signedAndEnveloped(p7))
440 return p7->d.signed_and_enveloped->recipientinfo;
441 if (PKCS7_type_is_enveloped(p7))
442 return p7->d.enveloped->recipientinfo;
443 return NULL;
444 }
445
446 /*
447 * Set up the library context into any loaded structure that needs it.
448 * i.e loaded X509 objects.
449 */
ossl_pkcs7_resolve_libctx(PKCS7 * p7)450 void ossl_pkcs7_resolve_libctx(PKCS7 *p7)
451 {
452 int i;
453 const PKCS7_CTX *ctx = ossl_pkcs7_get0_ctx(p7);
454 OSSL_LIB_CTX *libctx = ossl_pkcs7_ctx_get0_libctx(ctx);
455 const char *propq = ossl_pkcs7_ctx_get0_propq(ctx);
456 STACK_OF(PKCS7_RECIP_INFO) *rinfos;
457 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
458 STACK_OF(X509) *certs;
459
460 if (ctx == NULL || p7->d.ptr == NULL)
461 return;
462
463 rinfos = pkcs7_get_recipient_info(p7);
464 sinfos = PKCS7_get_signer_info(p7);
465 certs = pkcs7_get0_certificates(p7);
466
467 for (i = 0; i < sk_X509_num(certs); i++)
468 ossl_x509_set0_libctx(sk_X509_value(certs, i), libctx, propq);
469
470 for (i = 0; i < sk_PKCS7_RECIP_INFO_num(rinfos); i++) {
471 PKCS7_RECIP_INFO *ri = sk_PKCS7_RECIP_INFO_value(rinfos, i);
472
473 ossl_x509_set0_libctx(ri->cert, libctx, propq);
474 }
475
476 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
477 PKCS7_SIGNER_INFO *si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
478
479 if (si != NULL)
480 si->ctx = ctx;
481 }
482 }
483
ossl_pkcs7_get0_ctx(const PKCS7 * p7)484 const PKCS7_CTX *ossl_pkcs7_get0_ctx(const PKCS7 *p7)
485 {
486 return p7 != NULL ? &p7->ctx : NULL;
487 }
488
ossl_pkcs7_set0_libctx(PKCS7 * p7,OSSL_LIB_CTX * ctx)489 void ossl_pkcs7_set0_libctx(PKCS7 *p7, OSSL_LIB_CTX *ctx)
490 {
491 p7->ctx.libctx = ctx;
492 }
493
ossl_pkcs7_set1_propq(PKCS7 * p7,const char * propq)494 int ossl_pkcs7_set1_propq(PKCS7 *p7, const char *propq)
495 {
496 if (p7->ctx.propq != NULL) {
497 OPENSSL_free(p7->ctx.propq);
498 p7->ctx.propq = NULL;
499 }
500 if (propq != NULL) {
501 p7->ctx.propq = OPENSSL_strdup(propq);
502 if (p7->ctx.propq == NULL)
503 return 0;
504 }
505 return 1;
506 }
507
ossl_pkcs7_ctx_propagate(const PKCS7 * from,PKCS7 * to)508 int ossl_pkcs7_ctx_propagate(const PKCS7 *from, PKCS7 *to)
509 {
510 ossl_pkcs7_set0_libctx(to, from->ctx.libctx);
511 if (!ossl_pkcs7_set1_propq(to, from->ctx.propq))
512 return 0;
513
514 ossl_pkcs7_resolve_libctx(to);
515 return 1;
516 }
517
ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX * ctx)518 OSSL_LIB_CTX *ossl_pkcs7_ctx_get0_libctx(const PKCS7_CTX *ctx)
519 {
520 return ctx != NULL ? ctx->libctx : NULL;
521 }
ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX * ctx)522 const char *ossl_pkcs7_ctx_get0_propq(const PKCS7_CTX *ctx)
523 {
524 return ctx != NULL ? ctx->propq : NULL;
525 }
526
PKCS7_set_digest(PKCS7 * p7,const EVP_MD * md)527 int PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md)
528 {
529 if (PKCS7_type_is_digest(p7)) {
530 if ((p7->d.digest->md->parameter = ASN1_TYPE_new()) == NULL) {
531 ERR_raise(ERR_LIB_PKCS7, ERR_R_ASN1_LIB);
532 return 0;
533 }
534 p7->d.digest->md->parameter->type = V_ASN1_NULL;
535 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md));
536 return 1;
537 }
538
539 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
540 return 1;
541 }
542
STACK_OF(PKCS7_SIGNER_INFO)543 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
544 {
545 if (p7 == NULL || p7->d.ptr == NULL)
546 return NULL;
547 if (PKCS7_type_is_signed(p7)) {
548 return p7->d.sign->signer_info;
549 } else if (PKCS7_type_is_signedAndEnveloped(p7)) {
550 return p7->d.signed_and_enveloped->signer_info;
551 } else
552 return NULL;
553 }
554
PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO * si,EVP_PKEY ** pk,X509_ALGOR ** pdig,X509_ALGOR ** psig)555 void PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk,
556 X509_ALGOR **pdig, X509_ALGOR **psig)
557 {
558 if (pk)
559 *pk = si->pkey;
560 if (pdig)
561 *pdig = si->digest_alg;
562 if (psig)
563 *psig = si->digest_enc_alg;
564 }
565
PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO * ri,X509_ALGOR ** penc)566 void PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc)
567 {
568 if (penc)
569 *penc = ri->key_enc_algor;
570 }
571
PKCS7_add_recipient(PKCS7 * p7,X509 * x509)572 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
573 {
574 PKCS7_RECIP_INFO *ri;
575
576 if ((ri = PKCS7_RECIP_INFO_new()) == NULL)
577 goto err;
578 if (PKCS7_RECIP_INFO_set(ri, x509) <= 0)
579 goto err;
580 if (!PKCS7_add_recipient_info(p7, ri))
581 goto err;
582 ri->ctx = ossl_pkcs7_get0_ctx(p7);
583 return ri;
584 err:
585 PKCS7_RECIP_INFO_free(ri);
586 return NULL;
587 }
588
PKCS7_add_recipient_info(PKCS7 * p7,PKCS7_RECIP_INFO * ri)589 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
590 {
591 int i;
592 STACK_OF(PKCS7_RECIP_INFO) *sk;
593
594 i = OBJ_obj2nid(p7->type);
595 switch (i) {
596 case NID_pkcs7_signedAndEnveloped:
597 sk = p7->d.signed_and_enveloped->recipientinfo;
598 break;
599 case NID_pkcs7_enveloped:
600 sk = p7->d.enveloped->recipientinfo;
601 break;
602 default:
603 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
604 return 0;
605 }
606
607 if (!sk_PKCS7_RECIP_INFO_push(sk, ri))
608 return 0;
609 return 1;
610 }
611
pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO * ri,int decrypt)612 static int pkcs7_rsa_encrypt_decrypt_setup(PKCS7_RECIP_INFO *ri, int decrypt)
613 {
614 X509_ALGOR *alg = NULL;
615
616 if (!decrypt) {
617 PKCS7_RECIP_INFO_get0_alg(ri, &alg);
618 if (alg != NULL)
619 return X509_ALGOR_set0(alg, OBJ_nid2obj(NID_rsaEncryption),
620 V_ASN1_NULL, NULL);
621 }
622 return 1;
623 }
624
PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO * p7i,X509 * x509)625 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
626 {
627 int ret;
628 EVP_PKEY *pkey = NULL;
629 if (!ASN1_INTEGER_set(p7i->version, 0))
630 return 0;
631 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer,
632 X509_get_issuer_name(x509)))
633 return 0;
634
635 ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
636 if (!(p7i->issuer_and_serial->serial = ASN1_INTEGER_dup(X509_get0_serialNumber(x509))))
637 return 0;
638
639 pkey = X509_get0_pubkey(x509);
640 if (pkey == NULL)
641 return 0;
642
643 if (EVP_PKEY_is_a(pkey, "RSA-PSS"))
644 return -2;
645 if (EVP_PKEY_is_a(pkey, "RSA")) {
646 if (pkcs7_rsa_encrypt_decrypt_setup(p7i, 0) <= 0)
647 goto err;
648 goto finished;
649 }
650
651 if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL) {
652 ERR_raise(ERR_LIB_PKCS7,
653 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
654 goto err;
655 }
656
657 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 0, p7i);
658 if (ret == -2) {
659 ERR_raise(ERR_LIB_PKCS7,
660 PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
661 goto err;
662 }
663 if (ret <= 0) {
664 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_ENCRYPTION_CTRL_FAILURE);
665 goto err;
666 }
667 finished:
668 if (!X509_up_ref(x509))
669 goto err;
670
671 p7i->cert = x509;
672
673 return 1;
674
675 err:
676 return 0;
677 }
678
PKCS7_cert_from_signer_info(PKCS7 * p7,PKCS7_SIGNER_INFO * si)679 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
680 {
681 if (PKCS7_type_is_signed(p7))
682 return (X509_find_by_issuer_and_serial(p7->d.sign->cert,
683 si->issuer_and_serial->issuer,
684 si->issuer_and_serial->serial));
685 else
686 return NULL;
687 }
688
PKCS7_set_cipher(PKCS7 * p7,const EVP_CIPHER * cipher)689 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
690 {
691 int i;
692 PKCS7_ENC_CONTENT *ec;
693
694 i = OBJ_obj2nid(p7->type);
695 switch (i) {
696 case NID_pkcs7_signedAndEnveloped:
697 ec = p7->d.signed_and_enveloped->enc_data;
698 break;
699 case NID_pkcs7_enveloped:
700 ec = p7->d.enveloped->enc_data;
701 break;
702 default:
703 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_WRONG_CONTENT_TYPE);
704 return 0;
705 }
706
707 /* Check cipher OID exists and has data in it */
708 i = EVP_CIPHER_get_type(cipher);
709 if (i == NID_undef) {
710 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
711 return 0;
712 }
713
714 ec->cipher = cipher;
715 ec->ctx = ossl_pkcs7_get0_ctx(p7);
716 return 1;
717 }
718
719 /* unfortunately cannot constify BIO_new_NDEF() due to this and CMS_stream() */
PKCS7_stream(unsigned char *** boundary,PKCS7 * p7)720 int PKCS7_stream(unsigned char ***boundary, PKCS7 *p7)
721 {
722 ASN1_OCTET_STRING *os = NULL;
723
724 switch (OBJ_obj2nid(p7->type)) {
725 case NID_pkcs7_data:
726 os = p7->d.data;
727 break;
728
729 case NID_pkcs7_signedAndEnveloped:
730 os = p7->d.signed_and_enveloped->enc_data->enc_data;
731 if (os == NULL) {
732 os = ASN1_OCTET_STRING_new();
733 p7->d.signed_and_enveloped->enc_data->enc_data = os;
734 }
735 break;
736
737 case NID_pkcs7_enveloped:
738 os = p7->d.enveloped->enc_data->enc_data;
739 if (os == NULL) {
740 os = ASN1_OCTET_STRING_new();
741 p7->d.enveloped->enc_data->enc_data = os;
742 }
743 break;
744
745 case NID_pkcs7_signed:
746 if (p7->d.sign == NULL || p7->d.sign->contents == NULL) {
747 ERR_raise(ERR_LIB_PKCS7, PKCS7_R_NO_CONTENT);
748 break;
749 }
750 os = p7->d.sign->contents->d.data;
751 break;
752
753 default:
754 os = NULL;
755 break;
756 }
757
758 if (os == NULL)
759 return 0;
760
761 os->flags |= ASN1_STRING_FLAG_NDEF;
762 *boundary = &os->data;
763
764 return 1;
765 }
766