3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com). This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
60 /* Simple PKCS#7 processing functions */
64 #include <openssl/x509.h>
65 #include <openssl/x509v3.h>
67 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
69 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
75 if (!(p7 = PKCS7_new())) {
76 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
80 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
83 if (!PKCS7_content_new(p7, NID_pkcs7_data))
86 if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
87 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
91 if (!(flags & PKCS7_NOCERTS)) {
92 for (i = 0; i < sk_X509_num(certs); i++) {
93 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
98 if (flags & PKCS7_DETACHED)
99 PKCS7_set_detached(p7, 1);
101 if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
104 if (PKCS7_final(p7, data, flags))
112 int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
116 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
117 PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
121 SMIME_crlf_copy(data, p7bio, flags);
123 (void)BIO_flush(p7bio);
125 if (!PKCS7_dataFinal(p7, p7bio)) {
126 PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
139 /* Check to see if a cipher exists and if so add S/MIME capabilities */
141 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
143 if (EVP_get_cipherbynid(nid))
144 return PKCS7_simple_smimecap(sk, nid, arg);
148 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
150 if (EVP_get_digestbynid(nid))
151 return PKCS7_simple_smimecap(sk, nid, arg);
155 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
156 EVP_PKEY *pkey, const EVP_MD *md,
159 PKCS7_SIGNER_INFO *si = NULL;
160 STACK_OF(X509_ALGOR) *smcap = NULL;
161 if (!X509_check_private_key(signcert, pkey)) {
162 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
163 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
167 if (!(si = PKCS7_add_signature(p7, signcert, pkey, md))) {
168 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
169 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
173 if (!(flags & PKCS7_NOCERTS)) {
174 if (!PKCS7_add_certificate(p7, signcert))
178 if (!(flags & PKCS7_NOATTR)) {
179 if (!PKCS7_add_attrib_content_type(si, NULL))
181 /* Add SMIMECapabilities */
182 if (!(flags & PKCS7_NOSMIMECAP)) {
183 if (!(smcap = sk_X509_ALGOR_new_null())) {
184 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
187 if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
188 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
189 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
190 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
191 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
192 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
193 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
194 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
195 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
196 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
197 || !PKCS7_add_attrib_smimecap(si, smcap))
199 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
202 if (flags & PKCS7_REUSE_DIGEST) {
203 if (!pkcs7_copy_existing_digest(p7, si))
205 if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
212 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
217 * Search for a digest matching SignerInfo digest type and if found copy
221 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
224 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
225 PKCS7_SIGNER_INFO *sitmp;
226 ASN1_OCTET_STRING *osdig = NULL;
227 sinfos = PKCS7_get_signer_info(p7);
228 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
229 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
232 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
234 if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
235 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
242 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
244 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
245 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
249 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
250 BIO *indata, BIO *out, int flags)
252 STACK_OF(X509) *signers;
254 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
255 PKCS7_SIGNER_INFO *si;
256 X509_STORE_CTX cert_ctx;
258 int i, j = 0, k, ret = 0;
263 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
267 if (!PKCS7_type_is_signed(p7)) {
268 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
272 /* Check for no data and no content: no data to verify signature */
273 if (PKCS7_get_detached(p7) && !indata) {
274 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
279 * Very old Netscape illegally included empty content with
280 * a detached signature. To not support that, enable the
283 #ifdef OPENSSL_DONT_SUPPORT_OLD_NETSCAPE
284 /* Check for data and content: two sets of data */
285 if (!PKCS7_get_detached(p7) && indata) {
286 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
291 sinfos = PKCS7_get_signer_info(p7);
293 if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
294 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
298 signers = PKCS7_get0_signers(p7, certs, flags);
303 /* Now verify the certificates */
305 if (!(flags & PKCS7_NOVERIFY))
306 for (k = 0; k < sk_X509_num(signers); k++) {
307 signer = sk_X509_value(signers, k);
308 if (!(flags & PKCS7_NOCHAIN)) {
309 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
311 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
312 sk_X509_free(signers);
315 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
316 } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
317 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
318 sk_X509_free(signers);
321 if (!(flags & PKCS7_NOCRL))
322 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
323 i = X509_verify_cert(&cert_ctx);
325 j = X509_STORE_CTX_get_error(&cert_ctx);
326 X509_STORE_CTX_cleanup(&cert_ctx);
328 PKCS7err(PKCS7_F_PKCS7_VERIFY,
329 PKCS7_R_CERTIFICATE_VERIFY_ERROR);
330 ERR_add_error_data(2, "Verify error:",
331 X509_verify_cert_error_string(j));
332 sk_X509_free(signers);
335 /* Check for revocation status here */
339 * Performance optimization: if the content is a memory BIO then store
340 * its contents in a temporary read only memory BIO. This avoids
341 * potentially large numbers of slow copies of data which will occur when
342 * reading from a read write memory BIO when signatures are calculated.
345 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
348 len = BIO_get_mem_data(indata, &ptr);
349 tmpin = BIO_new_mem_buf(ptr, len);
351 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
357 if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
360 if (flags & PKCS7_TEXT) {
361 if (!(tmpout = BIO_new(BIO_s_mem()))) {
362 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
365 BIO_set_mem_eof_return(tmpout, 0);
369 /* We now have to 'read' from p7bio to calculate digests etc. */
371 i = BIO_read(p7bio, buf, sizeof(buf));
375 BIO_write(tmpout, buf, i);
378 if (flags & PKCS7_TEXT) {
379 if (!SMIME_text(tmpout, out)) {
380 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
387 /* Now Verify All Signatures */
388 if (!(flags & PKCS7_NOSIGS))
389 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
390 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
391 signer = sk_X509_value(signers, i);
392 j = PKCS7_signatureVerify(p7bio, p7, si, signer);
394 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
403 if (tmpin == indata) {
409 sk_X509_free(signers);
414 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
417 STACK_OF(X509) *signers;
418 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
419 PKCS7_SIGNER_INFO *si;
420 PKCS7_ISSUER_AND_SERIAL *ias;
425 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
429 if (!PKCS7_type_is_signed(p7)) {
430 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
434 /* Collect all the signers together */
436 sinfos = PKCS7_get_signer_info(p7);
438 if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
439 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
443 if (!(signers = sk_X509_new_null())) {
444 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
448 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
449 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
450 ias = si->issuer_and_serial;
452 /* If any certificates passed they take priority */
454 signer = X509_find_by_issuer_and_serial(certs,
455 ias->issuer, ias->serial);
456 if (!signer && !(flags & PKCS7_NOINTERN)
459 X509_find_by_issuer_and_serial(p7->d.sign->cert,
460 ias->issuer, ias->serial);
462 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
463 PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
464 sk_X509_free(signers);
468 if (!sk_X509_push(signers, signer)) {
469 sk_X509_free(signers);
476 /* Build a complete PKCS#7 enveloped data */
478 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
485 if (!(p7 = PKCS7_new())) {
486 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
490 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
492 if (!PKCS7_set_cipher(p7, cipher)) {
493 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
497 for (i = 0; i < sk_X509_num(certs); i++) {
498 x509 = sk_X509_value(certs, i);
499 if (!PKCS7_add_recipient(p7, x509)) {
500 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
505 if (flags & PKCS7_STREAM)
508 if (PKCS7_final(p7, in, flags))
519 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
526 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
530 if (!PKCS7_type_is_enveloped(p7)) {
531 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
535 if (cert && !X509_check_private_key(cert, pkey)) {
536 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
537 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
541 if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
542 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
546 if (flags & PKCS7_TEXT) {
548 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
549 if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
550 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
551 BIO_free_all(tmpmem);
554 if (!(bread = BIO_push(tmpbuf, tmpmem))) {
555 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
556 BIO_free_all(tmpbuf);
557 BIO_free_all(tmpmem);
560 ret = SMIME_text(bread, data);
561 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
562 if (!BIO_get_cipher_status(tmpmem))
569 i = BIO_read(tmpmem, buf, sizeof(buf));
572 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
573 if (!BIO_get_cipher_status(tmpmem))
579 if (BIO_write(data, buf, i) != i) {
584 BIO_free_all(tmpmem);