1 files changed, 587 insertions, 0 deletions

diff --git a/src/lib/libcrypto/pkcs7/pk7_smime.c b/src/lib/libcrypto/pkcs7/pk7_smime.c
new file mode 100644
index 0000000000..86742d0dcd
--- /dev/null
+++ b/src/lib/libcrypto/pkcs7/pk7_smime.c
@@ -0,0 +1,587 @@
+/* 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);
+                BIO_free_all(bread);
+                return ret;
+        } else {
+                for(;;) {
+                        i = BIO_read(tmpmem, buf, sizeof(buf));
+                        if(i <= 0) break;
+                        BIO_write(data, buf, i);
+                }
+                BIO_free_all(tmpmem);
+                return 1;
+        }
+}