--- /dev/null
+/* pk7_smime.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project.
+ */
+/* ====================================================================
+ * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/* Simple PKCS#7 processing functions */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+
+static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si);
+
+PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
+ BIO *data, int flags)
+{
+ PKCS7 *p7;
+ int i;
+
+ if(!(p7 = PKCS7_new()))
+ {
+ PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (!PKCS7_set_type(p7, NID_pkcs7_signed))
+ goto err;
+
+ if (!PKCS7_content_new(p7, NID_pkcs7_data))
+ goto err;
+
+ if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags))
+ {
+ PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNER_ERROR);
+ goto err;
+ }
+
+ if(!(flags & PKCS7_NOCERTS))
+ {
+ for(i = 0; i < sk_X509_num(certs); i++)
+ {
+ if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i)))
+ goto err;
+ }
+ }
+
+ if(flags & PKCS7_DETACHED)
+ PKCS7_set_detached(p7, 1);
+
+ if (flags & (PKCS7_STREAM|PKCS7_PARTIAL))
+ return p7;
+
+ if (PKCS7_final(p7, data, flags))
+ return p7;
+
+ err:
+ PKCS7_free(p7);
+ return NULL;
+}
+
+int PKCS7_final(PKCS7 *p7, BIO *data, int flags)
+ {
+ BIO *p7bio;
+ int ret = 0;
+ if (!(p7bio = PKCS7_dataInit(p7, NULL)))
+ {
+ PKCS7err(PKCS7_F_PKCS7_FINAL,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+
+ SMIME_crlf_copy(data, p7bio, flags);
+
+ (void)BIO_flush(p7bio);
+
+
+ if (!PKCS7_dataFinal(p7,p7bio))
+ {
+ PKCS7err(PKCS7_F_PKCS7_FINAL,PKCS7_R_PKCS7_DATASIGN);
+ goto err;
+ }
+
+ ret = 1;
+
+ err:
+ BIO_free_all(p7bio);
+
+ return ret;
+
+ }
+
+/* Check to see if a cipher exists and if so add S/MIME capabilities */
+
+static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
+ {
+ if (EVP_get_cipherbynid(nid))
+ return PKCS7_simple_smimecap(sk, nid, arg);
+ return 1;
+ }
+
+static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg)
+ {
+ if (EVP_get_digestbynid(nid))
+ return PKCS7_simple_smimecap(sk, nid, arg);
+ return 1;
+ }
+
+PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert,
+ EVP_PKEY *pkey, const EVP_MD *md,
+ int flags)
+ {
+ PKCS7_SIGNER_INFO *si = NULL;
+ STACK_OF(X509_ALGOR) *smcap = NULL;
+ if(!X509_check_private_key(signcert, pkey))
+ {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+ PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
+ return NULL;
+ }
+
+ if (!(si = PKCS7_add_signature(p7,signcert,pkey, md)))
+ {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+ PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR);
+ return NULL;
+ }
+
+ if(!(flags & PKCS7_NOCERTS))
+ {
+ if (!PKCS7_add_certificate(p7, signcert))
+ goto err;
+ }
+
+ if(!(flags & PKCS7_NOATTR))
+ {
+ if (!PKCS7_add_attrib_content_type(si, NULL))
+ goto err;
+ /* Add SMIMECapabilities */
+ if(!(flags & PKCS7_NOSMIMECAP))
+ {
+ if(!(smcap = sk_X509_ALGOR_new_null()))
+ {
+ PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER,
+ ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1)
+ || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1)
+ || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1)
+ || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 128)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 64)
+ || !add_cipher_smcap(smcap, NID_des_cbc, -1)
+ || !add_cipher_smcap(smcap, NID_rc2_cbc, 40)
+ || !PKCS7_add_attrib_smimecap (si, smcap))
+ goto err;
+ sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
+ smcap = NULL;
+ }
+ if (flags & PKCS7_REUSE_DIGEST)
+ {
+ if (!pkcs7_copy_existing_digest(p7, si))
+ goto err;
+ if (!(flags & PKCS7_PARTIAL) &&
+ !PKCS7_SIGNER_INFO_sign(si))
+ goto err;
+ }
+ }
+ return si;
+ err:
+ if (smcap)
+ sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free);
+ return NULL;
+ }
+
+/* Search for a digest matching SignerInfo digest type and if found
+ * copy across.
+ */
+
+static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
+ {
+ int i;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *sitmp;
+ ASN1_OCTET_STRING *osdig = NULL;
+ sinfos = PKCS7_get_signer_info(p7);
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
+ {
+ sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+ if (si == sitmp)
+ break;
+ if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0)
+ continue;
+ if (!OBJ_cmp(si->digest_alg->algorithm,
+ sitmp->digest_alg->algorithm))
+ {
+ osdig = PKCS7_digest_from_attributes(sitmp->auth_attr);
+ break;
+ }
+
+ }
+
+ if (osdig)
+ return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length);
+
+ PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST,
+ PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND);
+ return 0;
+ }
+
+int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store,
+ BIO *indata, BIO *out, int flags)
+{
+ STACK_OF(X509) *signers;
+ X509 *signer;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *si;
+ X509_STORE_CTX cert_ctx;
+ char buf[4096];
+ int i, j=0, k, ret = 0;
+ BIO *p7bio;
+ BIO *tmpin, *tmpout;
+
+ if(!p7) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER);
+ return 0;
+ }
+
+ if(!PKCS7_type_is_signed(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_WRONG_CONTENT_TYPE);
+ return 0;
+ }
+
+ /* Check for no data and no content: no data to verify signature */
+ if(PKCS7_get_detached(p7) && !indata) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT);
+ return 0;
+ }
+#if 0
+ /* NB: this test commented out because some versions of Netscape
+ * illegally include zero length content when signing data.
+ */
+
+ /* Check for data and content: two sets of data */
+ if(!PKCS7_get_detached(p7) && indata) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AND_DATA_PRESENT);
+ return 0;
+ }
+#endif
+
+ sinfos = PKCS7_get_signer_info(p7);
+
+ if(!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_SIGNATURES_ON_DATA);
+ return 0;
+ }
+
+
+ signers = PKCS7_get0_signers(p7, certs, flags);
+
+ if(!signers) return 0;
+
+ /* Now verify the certificates */
+
+ if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++) {
+ signer = sk_X509_value (signers, k);
+ if (!(flags & PKCS7_NOCHAIN)) {
+ if(!X509_STORE_CTX_init(&cert_ctx, store, signer,
+ p7->d.sign->cert))
+ {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
+ sk_X509_free(signers);
+ return 0;
+ }
+ X509_STORE_CTX_set_default(&cert_ctx, "smime_sign");
+ } else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB);
+ sk_X509_free(signers);
+ return 0;
+ }
+ if (!(flags & PKCS7_NOCRL))
+ X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl);
+ i = X509_verify_cert(&cert_ctx);
+ if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx);
+ X509_STORE_CTX_cleanup(&cert_ctx);
+ if (i <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CERTIFICATE_VERIFY_ERROR);
+ ERR_add_error_data(2, "Verify error:",
+ X509_verify_cert_error_string(j));
+ sk_X509_free(signers);
+ return 0;
+ }
+ /* Check for revocation status here */
+ }
+
+ /* Performance optimization: if the content is a memory BIO then
+ * store its contents in a temporary read only memory BIO. This
+ * avoids potentially large numbers of slow copies of data which will
+ * occur when reading from a read write memory BIO when signatures
+ * are calculated.
+ */
+
+ if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM))
+ {
+ char *ptr;
+ long len;
+ len = BIO_get_mem_data(indata, &ptr);
+ tmpin = BIO_new_mem_buf(ptr, len);
+ if (tmpin == NULL)
+ {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+ else
+ tmpin = indata;
+
+
+ if (!(p7bio=PKCS7_dataInit(p7,tmpin)))
+ goto err;
+
+ if(flags & PKCS7_TEXT) {
+ if(!(tmpout = BIO_new(BIO_s_mem()))) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ BIO_set_mem_eof_return(tmpout, 0);
+ } else tmpout = out;
+
+ /* We now have to 'read' from p7bio to calculate digests etc. */
+ for (;;)
+ {
+ i=BIO_read(p7bio,buf,sizeof(buf));
+ if (i <= 0) break;
+ if (tmpout) BIO_write(tmpout, buf, i);
+ }
+
+ if(flags & PKCS7_TEXT) {
+ if(!SMIME_text(tmpout, out)) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SMIME_TEXT_ERROR);
+ BIO_free(tmpout);
+ goto err;
+ }
+ BIO_free(tmpout);
+ }
+
+ /* Now Verify All Signatures */
+ if (!(flags & PKCS7_NOSIGS))
+ for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
+ {
+ si=sk_PKCS7_SIGNER_INFO_value(sinfos,i);
+ signer = sk_X509_value (signers, i);
+ j=PKCS7_signatureVerify(p7bio,p7,si, signer);
+ if (j <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SIGNATURE_FAILURE);
+ goto err;
+ }
+ }
+
+ ret = 1;
+
+ err:
+
+ if (tmpin == indata)
+ {
+ if (indata) BIO_pop(p7bio);
+ }
+ BIO_free_all(p7bio);
+
+ sk_X509_free(signers);
+
+ return ret;
+}
+
+STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags)
+{
+ STACK_OF(X509) *signers;
+ STACK_OF(PKCS7_SIGNER_INFO) *sinfos;
+ PKCS7_SIGNER_INFO *si;
+ PKCS7_ISSUER_AND_SERIAL *ias;
+ X509 *signer;
+ int i;
+
+ if(!p7) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_INVALID_NULL_POINTER);
+ return NULL;
+ }
+
+ if(!PKCS7_type_is_signed(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE);
+ return NULL;
+ }
+
+ /* Collect all the signers together */
+
+ sinfos = PKCS7_get_signer_info(p7);
+
+ if(sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_NO_SIGNERS);
+ return 0;
+ }
+
+ if(!(signers = sk_X509_new_null())) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++)
+ {
+ si = sk_PKCS7_SIGNER_INFO_value(sinfos, i);
+ ias = si->issuer_and_serial;
+ signer = NULL;
+ /* If any certificates passed they take priority */
+ if (certs) signer = X509_find_by_issuer_and_serial (certs,
+ ias->issuer, ias->serial);
+ if (!signer && !(flags & PKCS7_NOINTERN)
+ && p7->d.sign->cert) signer =
+ X509_find_by_issuer_and_serial (p7->d.sign->cert,
+ ias->issuer, ias->serial);
+ if (!signer) {
+ PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_SIGNER_CERTIFICATE_NOT_FOUND);
+ sk_X509_free(signers);
+ return 0;
+ }
+
+ if (!sk_X509_push(signers, signer)) {
+ sk_X509_free(signers);
+ return NULL;
+ }
+ }
+ return signers;
+}
+
+
+/* Build a complete PKCS#7 enveloped data */
+
+PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher,
+ int flags)
+{
+ PKCS7 *p7;
+ BIO *p7bio = NULL;
+ int i;
+ X509 *x509;
+ if(!(p7 = PKCS7_new())) {
+ PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE);
+ return NULL;
+ }
+
+ if (!PKCS7_set_type(p7, NID_pkcs7_enveloped))
+ goto err;
+ if (!PKCS7_set_cipher(p7, cipher)) {
+ PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER);
+ goto err;
+ }
+
+ for(i = 0; i < sk_X509_num(certs); i++) {
+ x509 = sk_X509_value(certs, i);
+ if(!PKCS7_add_recipient(p7, x509)) {
+ PKCS7err(PKCS7_F_PKCS7_ENCRYPT,
+ PKCS7_R_ERROR_ADDING_RECIPIENT);
+ goto err;
+ }
+ }
+
+ if (flags & PKCS7_STREAM)
+ return p7;
+
+ if (PKCS7_final(p7, in, flags))
+ return p7;
+
+ err:
+
+ BIO_free_all(p7bio);
+ PKCS7_free(p7);
+ return NULL;
+
+}
+
+int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags)
+{
+ BIO *tmpmem;
+ int ret, i;
+ char buf[4096];
+
+ if(!p7) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_INVALID_NULL_POINTER);
+ return 0;
+ }
+
+ if(!PKCS7_type_is_enveloped(p7)) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE);
+ return 0;
+ }
+
+ if(cert && !X509_check_private_key(cert, pkey)) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT,
+ PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE);
+ return 0;
+ }
+
+ if(!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR);
+ return 0;
+ }
+
+ if (flags & PKCS7_TEXT) {
+ BIO *tmpbuf, *bread;
+ /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */
+ if(!(tmpbuf = BIO_new(BIO_f_buffer()))) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
+ BIO_free_all(tmpmem);
+ return 0;
+ }
+ if(!(bread = BIO_push(tmpbuf, tmpmem))) {
+ PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE);
+ BIO_free_all(tmpbuf);
+ BIO_free_all(tmpmem);
+ return 0;
+ }
+ ret = SMIME_text(bread, data);
+ if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER)
+ {
+ if (!BIO_get_cipher_status(tmpmem))
+ ret = 0;
+ }
+ BIO_free_all(bread);
+ return ret;
+ } else {
+ for(;;) {
+ i = BIO_read(tmpmem, buf, sizeof(buf));
+ if(i <= 0)
+ {
+ ret = 1;
+ if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER)
+ {
+ if (!BIO_get_cipher_status(tmpmem))
+ ret = 0;
+ }
+
+ break;
+ }
+ if (BIO_write(data, buf, i) != i)
+ {
+ ret = 0;
+ break;
+ }
+ }
+ BIO_free_all(tmpmem);
+ return ret;
+ }
+}
projects / cassiopeia.git / blobdiff