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 */
63 #include "internal/cryptlib.h"
64 #include <openssl/x509.h>
65 #include <openssl/x509v3.h>
68 #define BUFFERSIZE 4096
70 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
72 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
78 if ((p7 = PKCS7_new()) == NULL) {
79 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
83 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
86 if (!PKCS7_content_new(p7, NID_pkcs7_data))
89 if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) {
90 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
94 if (!(flags & PKCS7_NOCERTS)) {
95 for (i = 0; i < sk_X509_num(certs); i++) {
96 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
101 if (flags & PKCS7_DETACHED)
102 PKCS7_set_detached(p7, 1);
104 if (flags & (PKCS7_STREAM | PKCS7_PARTIAL))
107 if (PKCS7_final(p7, data, flags))
115 int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
120 if ((p7bio = PKCS7_dataInit(p7, NULL)) == NULL) {
121 PKCS7err(PKCS7_F_PKCS7_FINAL, ERR_R_MALLOC_FAILURE);
125 SMIME_crlf_copy(data, p7bio, flags);
127 (void)BIO_flush(p7bio);
129 if (!PKCS7_dataFinal(p7, p7bio)) {
130 PKCS7err(PKCS7_F_PKCS7_FINAL, PKCS7_R_PKCS7_DATASIGN);
143 /* Check to see if a cipher exists and if so add S/MIME capabilities */
145 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
147 if (EVP_get_cipherbynid(nid))
148 return PKCS7_simple_smimecap(sk, nid, arg);
152 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
154 if (EVP_get_digestbynid(nid))
155 return PKCS7_simple_smimecap(sk, nid, arg);
159 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
160 EVP_PKEY *pkey, const EVP_MD *md,
163 PKCS7_SIGNER_INFO *si = NULL;
164 STACK_OF(X509_ALGOR) *smcap = NULL;
165 if (!X509_check_private_key(signcert, pkey)) {
166 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
167 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
171 if ((si = PKCS7_add_signature(p7, signcert, pkey, md)) == NULL) {
172 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
173 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
177 if (!(flags & PKCS7_NOCERTS)) {
178 if (!PKCS7_add_certificate(p7, signcert))
182 if (!(flags & PKCS7_NOATTR)) {
183 if (!PKCS7_add_attrib_content_type(si, NULL))
185 /* Add SMIMECapabilities */
186 if (!(flags & PKCS7_NOSMIMECAP)) {
187 if ((smcap = sk_X509_ALGOR_new_null()) == NULL) {
188 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, ERR_R_MALLOC_FAILURE);
191 if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
192 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
193 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
194 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
195 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
196 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
197 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
198 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
199 || !add_cipher_smcap(smcap, NID_des_cbc, -1)
200 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
201 || !PKCS7_add_attrib_smimecap(si, smcap))
203 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
206 if (flags & PKCS7_REUSE_DIGEST) {
207 if (!pkcs7_copy_existing_digest(p7, si))
209 if (!(flags & PKCS7_PARTIAL) && !PKCS7_SIGNER_INFO_sign(si))
215 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
220 * Search for a digest matching SignerInfo digest type and if found copy
224 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
227 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
228 PKCS7_SIGNER_INFO *sitmp;
229 ASN1_OCTET_STRING *osdig = NULL;
230 sinfos = PKCS7_get_signer_info(p7);
231 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
232 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
235 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
237 if (!OBJ_cmp(si->digest_alg->algorithm, sitmp->digest_alg->algorithm)) {
238 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
245 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
247 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
248 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
252 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
253 BIO *indata, BIO *out, int flags)
255 STACK_OF(X509) *signers;
257 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
258 PKCS7_SIGNER_INFO *si;
259 X509_STORE_CTX cert_ctx;
261 int i, j = 0, k, ret = 0;
263 BIO *tmpin = NULL, *tmpout = NULL;
266 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
270 if (!PKCS7_type_is_signed(p7)) {
271 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
275 /* Check for no data and no content: no data to verify signature */
276 if (PKCS7_get_detached(p7) && !indata) {
277 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
281 /* Check for data and content: two sets of data */
282 if (!PKCS7_get_detached(p7) && indata) {
283 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
287 sinfos = PKCS7_get_signer_info(p7);
289 if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
290 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
294 signers = PKCS7_get0_signers(p7, certs, flags);
298 /* Now verify the certificates */
300 if (!(flags & PKCS7_NOVERIFY))
301 for (k = 0; k < sk_X509_num(signers); k++) {
302 signer = sk_X509_value(signers, k);
303 if (!(flags & PKCS7_NOCHAIN)) {
304 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
306 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
309 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
310 } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
311 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
314 if (!(flags & PKCS7_NOCRL))
315 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
316 i = X509_verify_cert(&cert_ctx);
318 j = X509_STORE_CTX_get_error(&cert_ctx);
319 X509_STORE_CTX_cleanup(&cert_ctx);
321 PKCS7err(PKCS7_F_PKCS7_VERIFY,
322 PKCS7_R_CERTIFICATE_VERIFY_ERROR);
323 ERR_add_error_data(2, "Verify error:",
324 X509_verify_cert_error_string(j));
327 /* Check for revocation status here */
331 * Performance optimization: if the content is a memory BIO then store
332 * its contents in a temporary read only memory BIO. This avoids
333 * potentially large numbers of slow copies of data which will occur when
334 * reading from a read write memory BIO when signatures are calculated.
337 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
340 len = BIO_get_mem_data(indata, &ptr);
341 tmpin = BIO_new_mem_buf(ptr, len);
343 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
349 if ((p7bio = PKCS7_dataInit(p7, tmpin)) == NULL)
352 if (flags & PKCS7_TEXT) {
353 if ((tmpout = BIO_new(BIO_s_mem())) == NULL) {
354 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
357 BIO_set_mem_eof_return(tmpout, 0);
361 /* We now have to 'read' from p7bio to calculate digests etc. */
362 if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
363 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
367 i = BIO_read(p7bio, buf, BUFFERSIZE);
371 BIO_write(tmpout, buf, i);
374 if (flags & PKCS7_TEXT) {
375 if (!SMIME_text(tmpout, out)) {
376 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
383 /* Now Verify All Signatures */
384 if (!(flags & PKCS7_NOSIGS))
385 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
386 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
387 signer = sk_X509_value(signers, i);
388 j = PKCS7_signatureVerify(p7bio, p7, si, signer);
390 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
399 if (tmpin == indata) {
404 sk_X509_free(signers);
408 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
411 STACK_OF(X509) *signers;
412 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
413 PKCS7_SIGNER_INFO *si;
414 PKCS7_ISSUER_AND_SERIAL *ias;
419 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
423 if (!PKCS7_type_is_signed(p7)) {
424 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
428 /* Collect all the signers together */
430 sinfos = PKCS7_get_signer_info(p7);
432 if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
433 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
437 if ((signers = sk_X509_new_null()) == NULL) {
438 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
442 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
443 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
444 ias = si->issuer_and_serial;
446 /* If any certificates passed they take priority */
448 signer = X509_find_by_issuer_and_serial(certs,
449 ias->issuer, ias->serial);
450 if (!signer && !(flags & PKCS7_NOINTERN)
453 X509_find_by_issuer_and_serial(p7->d.sign->cert,
454 ias->issuer, ias->serial);
456 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
457 PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
458 sk_X509_free(signers);
462 if (!sk_X509_push(signers, signer)) {
463 sk_X509_free(signers);
470 /* Build a complete PKCS#7 enveloped data */
472 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
479 if ((p7 = PKCS7_new()) == NULL) {
480 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
484 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
486 if (!PKCS7_set_cipher(p7, cipher)) {
487 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
491 for (i = 0; i < sk_X509_num(certs); i++) {
492 x509 = sk_X509_value(certs, i);
493 if (!PKCS7_add_recipient(p7, x509)) {
494 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
499 if (flags & PKCS7_STREAM)
502 if (PKCS7_final(p7, in, flags))
513 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
520 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
524 if (!PKCS7_type_is_enveloped(p7)) {
525 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
529 if (cert && !X509_check_private_key(cert, pkey)) {
530 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
531 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
535 if ((tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert)) == NULL) {
536 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
540 if (flags & PKCS7_TEXT) {
542 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
543 if ((tmpbuf = BIO_new(BIO_f_buffer())) == NULL) {
544 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
545 BIO_free_all(tmpmem);
548 if ((bread = BIO_push(tmpbuf, tmpmem)) == NULL) {
549 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
550 BIO_free_all(tmpbuf);
551 BIO_free_all(tmpmem);
554 ret = SMIME_text(bread, data);
555 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
556 if (!BIO_get_cipher_status(tmpmem))
562 if ((buf = OPENSSL_malloc(BUFFERSIZE)) == NULL) {
563 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
567 i = BIO_read(tmpmem, buf, BUFFERSIZE);
570 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
571 if (!BIO_get_cipher_status(tmpmem))
577 if (BIO_write(data, buf, i) != i) {
583 BIO_free_all(tmpmem);