2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
59 /* Simple PKCS#7 processing functions */
62 #include "internal/cryptlib.h"
63 #include <openssl/x509.h>
64 #include <openssl/x509v3.h>
67 #define BUFFERSIZE 4096
69 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
71 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
77 if ((p7 = PKCS7_new()) == NULL) {
78 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
82 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
85 if (!PKCS7_content_new(p7, NID_pkcs7_data))
88 if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
89 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
93 if (!(flags & PKCS7_NOCERTS)) {
94 for (i = 0; i < sk_X509_num(certs); i++) {
95 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
100 if (flags & PKCS7_DETACHED)
101 PKCS7_set_detached(p7, 1);
103 if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
106 if (PKCS7_final(p7, data, flags))
114 int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
119 if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
120 PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
124 SMIME_crlf_copy(data, p7bio, flags);
126 (void)BIO_flush(p7bio);
128 if (!PKCS7_dataFinal(p7, p7bio)) {
129 PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
142 /* Check to see if a cipher exists and if so add S/MIME capabilities */
144 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
146 if (EVP_get_cipherbynid(nid))
147 return PKCS7_simple_smimecap(sk, nid, arg);
151 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
153 if (EVP_get_digestbynid(nid))
154 return PKCS7_simple_smimecap(sk, nid, arg);
158 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
159 EVP_PKEY *pkey, const EVP_MD *md,
162 PKCS7_SIGNER_INFO *si = NULL;
163 STACK_OF(X509_ALGOR) *smcap = NULL;
164 if (!X509_check_private_key(signcert, pkey)) {
165 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
166 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
170 if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
171 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
172 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
176 if (!(flags & PKCS7_NOCERTS)) {
177 if (!PKCS7_add_certificate(p7, signcert))
181 if (!(flags & PKCS7_NOATTR)) {
182 if (!PKCS7_add_attrib_content_type(si, NULL))
184 /* Add SMIMECapabilities */
185 if (!(flags & PKCS7_NOSMIMECAP)) {
186 if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
187 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
190 if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
191 || !add_digest_smcap(smcap, NID_id_GostR3411_2012_256, -1)
192 || !add_digest_smcap(smcap, NID_id_GostR3411_2012_512, -1)
193 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
194 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
195 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
196 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
197 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
198 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
199 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
200 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
201 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
202 || !PKCS7_add_attrib_smimecap(si, smcap))
204 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
207 if (flags & PKCS7_REUSE_DIGEST) {
208 if (!pkcs7_copy_existing_digest(p7, si))
210 if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
216 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
221 * Search for a digest matching SignerInfo digest type and if found copy
225 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
228 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
229 PKCS7_SIGNER_INFO *sitmp;
230 ASN1_OCTET_STRING *osdig = NULL;
231 sinfos = PKCS7_get_signer_info(p7);
232 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
233 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
236 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
238 if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
239 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
246 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
248 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
249 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
253 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
254 BIO *indata, BIO *out, int flags)
256 STACK_OF(X509) *signers;
258 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
259 PKCS7_SIGNER_INFO *si;
260 X509_STORE_CTX cert_ctx;
262 int i, j = 0, k, ret = 0;
264 BIO *tmpin = NULL, *tmpout = NULL;
267 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
271 if (!PKCS7_type_is_signed(p7)) {
272 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
276 /* Check for no data and no content: no data to verify signature */
277 if (PKCS7_get_detached(p7) && !indata) {
278 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
282 /* Check for data and content: two sets of data */
283 if (!PKCS7_get_detached(p7) && indata) {
284 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
288 sinfos = PKCS7_get_signer_info(p7);
290 if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
291 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
295 signers = PKCS7_get0_signers(p7, certs, flags);
299 /* Now verify the certificates */
301 if (!(flags & PKCS7_NOVERIFY))
302 for (k = 0; k < sk_X509_num(signers); k++) {
303 signer = sk_X509_value(signers, k);
304 if (!(flags & PKCS7_NOCHAIN)) {
305 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
307 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
310 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
311 } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
312 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
315 if (!(flags & PKCS7_NOCRL))
316 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
317 i = X509_verify_cert(&cert_ctx);
319 j = X509_STORE_CTX_get_error(&cert_ctx);
320 X509_STORE_CTX_cleanup(&cert_ctx);
322 PKCS7err(PKCS7_F_PKCS7_VERIFY,
323 PKCS7_R_CERTIFICATE_VERIFY_ERROR);
324 ERR_add_error_data(2, "Verify error:",
325 X509_verify_cert_error_string(j));
328 /* Check for revocation status here */
332 * Performance optimization: if the content is a memory BIO then store
333 * its contents in a temporary read only memory BIO. This avoids
334 * potentially large numbers of slow copies of data which will occur when
335 * reading from a read write memory BIO when signatures are calculated.
338 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
341 len = BIO_get_mem_data(indata, &ptr);
342 tmpin = BIO_new_mem_buf(ptr, len);
344 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
350 if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
353 if (flags & PKCS7_TEXT) {
354 if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
355 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
358 BIO_set_mem_eof_return(tmpout, 0);
362 /* We now have to 'read' from p7bio to calculate digests etc. */
363 if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
364 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
368 i = BIO_read(p7bio, buf, BUFFERSIZE);
372 BIO_write(tmpout, buf, i);
375 if (flags & PKCS7_TEXT) {
376 if (!SMIME_text(tmpout, out)) {
377 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
384 /* Now Verify All Signatures */
385 if (!(flags & PKCS7_NOSIGS))
386 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
387 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
388 signer = sk_X509_value(signers, i);
389 j = PKCS7_signatureVerify(p7bio, p7, si, signer);
391 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
400 if (tmpin == indata) {
405 sk_X509_free(signers);
409 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
412 STACK_OF(X509) *signers;
413 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
414 PKCS7_SIGNER_INFO *si;
415 PKCS7_ISSUER_AND_SERIAL *ias;
420 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
424 if (!PKCS7_type_is_signed(p7)) {
425 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
429 /* Collect all the signers together */
431 sinfos = PKCS7_get_signer_info(p7);
433 if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
434 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
438 if ((signers = sk_X509_new_null()) == NULL) {
439 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
443 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
444 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
445 ias = si->issuer_and_serial;
447 /* If any certificates passed they take priority */
449 signer = X509_find_by_issuer_and_serial(certs,
450 ias->issuer, ias->serial);
451 if (!signer && !(flags & PKCS7_NOINTERN)
454 X509_find_by_issuer_and_serial(p7->d.sign->cert,
455 ias->issuer, ias->serial);
457 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
458 PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
459 sk_X509_free(signers);
463 if (!sk_X509_push(signers, signer)) {
464 sk_X509_free(signers);
471 /* Build a complete PKCS#7 enveloped data */
473 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
480 if ((p7 = PKCS7_new()) == NULL) {
481 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
485 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
487 if (!PKCS7_set_cipher(p7, cipher)) {
488 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
492 for (i = 0; i < sk_X509_num(certs); i++) {
493 x509 = sk_X509_value(certs, i);
494 if (!PKCS7_add_recipient(p7, x509)) {
495 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
500 if (flags & PKCS7_STREAM)
503 if (PKCS7_final(p7, in, flags))
514 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
521 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
525 if (!PKCS7_type_is_enveloped(p7)) {
526 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
530 if (cert && !X509_check_private_key(cert, pkey)) {
531 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
532 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
536 if ((tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert)) == NULL) {
537 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
541 if (flags & PKCS7_TEXT) {
543 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
544 if ((tmpbuf = BIO_new(BIO_f_buffer())) == NULL) {
545 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
546 BIO_free_all(tmpmem);
549 if ((bread = BIO_push(tmpbuf, tmpmem)) == NULL) {
550 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
551 BIO_free_all(tmpbuf);
552 BIO_free_all(tmpmem);
555 ret = SMIME_text(bread, data);
556 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
557 if (!BIO_get_cipher_status(tmpmem))
563 if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
564 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
568 i = BIO_read(tmpmem, buf, BUFFERSIZE);
571 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
572 if (!BIO_get_cipher_status(tmpmem))
578 if (BIO_write(data, buf, i) != i) {
584 BIO_free_all(tmpmem);