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 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
71 PKCS7_SIGNER_INFO *si;
73 STACK_OF(X509_ALGOR) *smcap = NULL;
76 if (!X509_check_private_key(signcert, pkey)) {
77 PKCS7err(PKCS7_F_PKCS7_SIGN,
78 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
82 if (!(p7 = PKCS7_new())) {
83 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
87 if (!PKCS7_set_type(p7, NID_pkcs7_signed))
90 if (!PKCS7_content_new(p7, NID_pkcs7_data))
93 if (!(si = PKCS7_add_signature(p7, signcert, pkey, EVP_sha1()))) {
94 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
98 if (!(flags & PKCS7_NOCERTS)) {
99 if (!PKCS7_add_certificate(p7, signcert))
102 for (i = 0; i < sk_X509_num(certs); i++)
103 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
107 if (!(flags & PKCS7_NOATTR)) {
108 if (!PKCS7_add_signed_attribute(si, NID_pkcs9_contentType,
110 OBJ_nid2obj(NID_pkcs7_data)))
112 /* Add SMIMECapabilities */
113 if (!(flags & PKCS7_NOSMIMECAP)) {
114 if (!(smcap = sk_X509_ALGOR_new_null())) {
115 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
118 #ifndef OPENSSL_NO_DES
119 if (!PKCS7_simple_smimecap(smcap, NID_des_ede3_cbc, -1))
122 #ifndef OPENSSL_NO_RC2
123 if (!PKCS7_simple_smimecap(smcap, NID_rc2_cbc, 128))
125 if (!PKCS7_simple_smimecap(smcap, NID_rc2_cbc, 64))
128 #ifndef OPENSSL_NO_DES
129 if (!PKCS7_simple_smimecap(smcap, NID_des_cbc, -1))
132 #ifndef OPENSSL_NO_RC2
133 if (!PKCS7_simple_smimecap(smcap, NID_rc2_cbc, 40))
136 if (!PKCS7_add_attrib_smimecap(si, smcap))
138 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
143 if (flags & PKCS7_DETACHED)
144 PKCS7_set_detached(p7, 1);
146 if (flags & PKCS7_STREAM)
149 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
150 PKCS7err(PKCS7_F_PKCS7_SIGN, ERR_R_MALLOC_FAILURE);
154 SMIME_crlf_copy(data, p7bio, flags);
156 if (!PKCS7_dataFinal(p7, p7bio)) {
157 PKCS7err(PKCS7_F_PKCS7_SIGN, PKCS7_R_PKCS7_DATASIGN);
164 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
170 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
171 BIO *indata, BIO *out, int flags)
173 STACK_OF(X509) *signers;
175 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
176 PKCS7_SIGNER_INFO *si;
177 X509_STORE_CTX cert_ctx;
179 int i, j = 0, k, ret = 0;
184 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_INVALID_NULL_POINTER);
188 if (!PKCS7_type_is_signed(p7)) {
189 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_WRONG_CONTENT_TYPE);
193 /* Check for no data and no content: no data to verify signature */
194 if (PKCS7_get_detached(p7) && !indata) {
195 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_CONTENT);
200 * NB: this test commented out because some versions of Netscape
201 * illegally include zero length content when signing data.
204 /* Check for data and content: two sets of data */
205 if (!PKCS7_get_detached(p7) && indata) {
206 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_CONTENT_AND_DATA_PRESENT);
211 sinfos = PKCS7_get_signer_info(p7);
213 if (!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
214 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_NO_SIGNATURES_ON_DATA);
218 signers = PKCS7_get0_signers(p7, certs, flags);
223 /* Now verify the certificates */
225 if (!(flags & PKCS7_NOVERIFY))
226 for (k = 0; k < sk_X509_num(signers); k++) {
227 signer = sk_X509_value(signers, k);
228 if (!(flags & PKCS7_NOCHAIN)) {
229 if (!X509_STORE_CTX_init(&cert_ctx, store, signer,
231 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
232 sk_X509_free(signers);
235 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
236 } else if (!X509_STORE_CTX_init(&cert_ctx, store, signer, NULL)) {
237 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_X509_LIB);
238 sk_X509_free(signers);
241 if (!(flags & PKCS7_NOCRL))
242 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
243 i = X509_verify_cert(&cert_ctx);
245 j = X509_STORE_CTX_get_error(&cert_ctx);
246 X509_STORE_CTX_cleanup(&cert_ctx);
248 PKCS7err(PKCS7_F_PKCS7_VERIFY,
249 PKCS7_R_CERTIFICATE_VERIFY_ERROR);
250 ERR_add_error_data(2, "Verify error:",
251 X509_verify_cert_error_string(j));
252 sk_X509_free(signers);
255 /* Check for revocation status here */
259 * Performance optimization: if the content is a memory BIO then store
260 * its contents in a temporary read only memory BIO. This avoids
261 * potentially large numbers of slow copies of data which will occur when
262 * reading from a read write memory BIO when signatures are calculated.
265 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) {
268 len = BIO_get_mem_data(indata, &ptr);
269 tmpin = BIO_new_mem_buf(ptr, len);
271 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
277 if (!(p7bio = PKCS7_dataInit(p7, tmpin)))
280 if (flags & PKCS7_TEXT) {
281 if (!(tmpout = BIO_new(BIO_s_mem()))) {
282 PKCS7err(PKCS7_F_PKCS7_VERIFY, ERR_R_MALLOC_FAILURE);
285 BIO_set_mem_eof_return(tmpout, 0);
289 /* We now have to 'read' from p7bio to calculate digests etc. */
291 i = BIO_read(p7bio, buf, sizeof(buf));
295 BIO_write(tmpout, buf, i);
298 if (flags & PKCS7_TEXT) {
299 if (!SMIME_text(tmpout, out)) {
300 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SMIME_TEXT_ERROR);
307 /* Now Verify All Signatures */
308 if (!(flags & PKCS7_NOSIGS))
309 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
310 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
311 signer = sk_X509_value(signers, i);
312 j = PKCS7_signatureVerify(p7bio, p7, si, signer);
314 PKCS7err(PKCS7_F_PKCS7_VERIFY, PKCS7_R_SIGNATURE_FAILURE);
323 if (tmpin == indata) {
329 sk_X509_free(signers);
334 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs,
337 STACK_OF(X509) *signers;
338 STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
339 PKCS7_SIGNER_INFO *si;
340 PKCS7_ISSUER_AND_SERIAL *ias;
345 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_INVALID_NULL_POINTER);
349 if (!PKCS7_type_is_signed(p7)) {
350 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_WRONG_CONTENT_TYPE);
354 /* Collect all the signers together */
356 sinfos = PKCS7_get_signer_info(p7);
358 if (sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
359 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, PKCS7_R_NO_SIGNERS);
363 if (!(signers = sk_X509_new_null())) {
364 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS, ERR_R_MALLOC_FAILURE);
368 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) {
369 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
370 ias = si->issuer_and_serial;
372 /* If any certificates passed they take priority */
374 signer = X509_find_by_issuer_and_serial(certs,
375 ias->issuer, ias->serial);
376 if (!signer && !(flags & PKCS7_NOINTERN)
379 X509_find_by_issuer_and_serial(p7->d.sign->cert,
380 ias->issuer, ias->serial);
382 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,
383 PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
384 sk_X509_free(signers);
388 if (!sk_X509_push(signers, signer)) {
389 sk_X509_free(signers);
396 /* Build a complete PKCS#7 enveloped data */
398 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
405 if (!(p7 = PKCS7_new())) {
406 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
410 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
412 if (!PKCS7_set_cipher(p7, cipher)) {
413 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_SETTING_CIPHER);
417 for (i = 0; i < sk_X509_num(certs); i++) {
418 x509 = sk_X509_value(certs, i);
419 if (!PKCS7_add_recipient(p7, x509)) {
420 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_ERROR_ADDING_RECIPIENT);
425 if (!(p7bio = PKCS7_dataInit(p7, NULL))) {
426 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, ERR_R_MALLOC_FAILURE);
430 SMIME_crlf_copy(in, p7bio, flags);
432 (void)BIO_flush(p7bio);
434 if (!PKCS7_dataFinal(p7, p7bio)) {
435 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, PKCS7_R_PKCS7_DATAFINAL_ERROR);
450 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
457 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_INVALID_NULL_POINTER);
461 if (!PKCS7_type_is_enveloped(p7)) {
462 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_WRONG_CONTENT_TYPE);
466 if (cert && !X509_check_private_key(cert, pkey)) {
467 PKCS7err(PKCS7_F_PKCS7_DECRYPT,
468 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
472 if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
473 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
477 if (flags & PKCS7_TEXT) {
479 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
480 if (!(tmpbuf = BIO_new(BIO_f_buffer()))) {
481 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
482 BIO_free_all(tmpmem);
485 if (!(bread = BIO_push(tmpbuf, tmpmem))) {
486 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
487 BIO_free_all(tmpbuf);
488 BIO_free_all(tmpmem);
491 ret = SMIME_text(bread, data);
492 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
493 if (!BIO_get_cipher_status(tmpmem))
500 i = BIO_read(tmpmem, buf, sizeof(buf));
503 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) {
504 if (!BIO_get_cipher_status(tmpmem))
510 if (BIO_write(data, buf, i) != i) {
515 BIO_free_all(tmpmem);