858 lines
22 KiB
C
858 lines
22 KiB
C
/* smime.c */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project.
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*/
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/* ====================================================================
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* Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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/* S/MIME utility function */
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#include <stdio.h>
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#include <string.h>
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#include "apps.h"
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#include <openssl/crypto.h>
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#include <openssl/pem.h>
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#include <openssl/err.h>
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#include <openssl/x509_vfy.h>
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#include <openssl/x509v3.h>
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#undef PROG
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#define PROG smime_main
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static int save_certs(char *signerfile, STACK_OF(X509) *signers);
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static int smime_cb(int ok, X509_STORE_CTX *ctx);
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#define SMIME_OP 0x10
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#define SMIME_IP 0x20
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#define SMIME_SIGNERS 0x40
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#define SMIME_ENCRYPT (1 | SMIME_OP)
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#define SMIME_DECRYPT (2 | SMIME_IP)
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#define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
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#define SMIME_VERIFY (4 | SMIME_IP)
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#define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
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#define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
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int MAIN(int, char **);
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int MAIN(int argc, char **argv)
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{
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ENGINE *e = NULL;
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int operation = 0;
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int ret = 0;
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char **args;
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const char *inmode = "r", *outmode = "w";
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char *infile = NULL, *outfile = NULL;
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char *signerfile = NULL, *recipfile = NULL;
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STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
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char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
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const EVP_CIPHER *cipher = NULL;
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PKCS7 *p7 = NULL;
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X509_STORE *store = NULL;
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X509 *cert = NULL, *recip = NULL, *signer = NULL;
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EVP_PKEY *key = NULL;
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STACK_OF(X509) *encerts = NULL, *other = NULL;
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BIO *in = NULL, *out = NULL, *indata = NULL;
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int badarg = 0;
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int flags = PKCS7_DETACHED;
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char *to = NULL, *from = NULL, *subject = NULL;
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char *CAfile = NULL, *CApath = NULL;
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char *passargin = NULL, *passin = NULL;
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char *inrand = NULL;
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int need_rand = 0;
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int indef = 0;
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const EVP_MD *sign_md = NULL;
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int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
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int keyform = FORMAT_PEM;
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#ifndef OPENSSL_NO_ENGINE
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char *engine=NULL;
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#endif
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X509_VERIFY_PARAM *vpm = NULL;
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args = argv + 1;
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ret = 1;
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apps_startup();
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if (bio_err == NULL)
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{
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if ((bio_err = BIO_new(BIO_s_file())) != NULL)
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BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
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}
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if (!load_config(bio_err, NULL))
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goto end;
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while (!badarg && *args && *args[0] == '-')
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{
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if (!strcmp (*args, "-encrypt"))
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operation = SMIME_ENCRYPT;
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else if (!strcmp (*args, "-decrypt"))
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operation = SMIME_DECRYPT;
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else if (!strcmp (*args, "-sign"))
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operation = SMIME_SIGN;
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else if (!strcmp (*args, "-resign"))
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operation = SMIME_RESIGN;
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else if (!strcmp (*args, "-verify"))
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operation = SMIME_VERIFY;
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else if (!strcmp (*args, "-pk7out"))
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operation = SMIME_PK7OUT;
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#ifndef OPENSSL_NO_DES
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else if (!strcmp (*args, "-des3"))
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cipher = EVP_des_ede3_cbc();
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else if (!strcmp (*args, "-des"))
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cipher = EVP_des_cbc();
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#endif
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#ifndef OPENSSL_NO_SEED
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else if (!strcmp (*args, "-seed"))
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cipher = EVP_seed_cbc();
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#endif
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#ifndef OPENSSL_NO_RC2
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else if (!strcmp (*args, "-rc2-40"))
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cipher = EVP_rc2_40_cbc();
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else if (!strcmp (*args, "-rc2-128"))
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cipher = EVP_rc2_cbc();
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else if (!strcmp (*args, "-rc2-64"))
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cipher = EVP_rc2_64_cbc();
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#endif
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#ifndef OPENSSL_NO_AES
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else if (!strcmp(*args,"-aes128"))
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cipher = EVP_aes_128_cbc();
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else if (!strcmp(*args,"-aes192"))
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cipher = EVP_aes_192_cbc();
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else if (!strcmp(*args,"-aes256"))
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cipher = EVP_aes_256_cbc();
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#endif
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#ifndef OPENSSL_NO_CAMELLIA
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else if (!strcmp(*args,"-camellia128"))
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cipher = EVP_camellia_128_cbc();
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else if (!strcmp(*args,"-camellia192"))
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cipher = EVP_camellia_192_cbc();
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else if (!strcmp(*args,"-camellia256"))
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cipher = EVP_camellia_256_cbc();
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#endif
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else if (!strcmp (*args, "-text"))
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flags |= PKCS7_TEXT;
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else if (!strcmp (*args, "-nointern"))
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flags |= PKCS7_NOINTERN;
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else if (!strcmp (*args, "-noverify"))
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flags |= PKCS7_NOVERIFY;
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else if (!strcmp (*args, "-nochain"))
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flags |= PKCS7_NOCHAIN;
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else if (!strcmp (*args, "-nocerts"))
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flags |= PKCS7_NOCERTS;
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else if (!strcmp (*args, "-noattr"))
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flags |= PKCS7_NOATTR;
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else if (!strcmp (*args, "-nodetach"))
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flags &= ~PKCS7_DETACHED;
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else if (!strcmp (*args, "-nosmimecap"))
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flags |= PKCS7_NOSMIMECAP;
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else if (!strcmp (*args, "-binary"))
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flags |= PKCS7_BINARY;
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else if (!strcmp (*args, "-nosigs"))
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flags |= PKCS7_NOSIGS;
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else if (!strcmp (*args, "-stream"))
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indef = 1;
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else if (!strcmp (*args, "-indef"))
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indef = 1;
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else if (!strcmp (*args, "-noindef"))
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indef = 0;
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else if (!strcmp (*args, "-nooldmime"))
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flags |= PKCS7_NOOLDMIMETYPE;
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else if (!strcmp (*args, "-crlfeol"))
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flags |= PKCS7_CRLFEOL;
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else if (!strcmp(*args,"-rand"))
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{
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if (!args[1])
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goto argerr;
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args++;
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inrand = *args;
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need_rand = 1;
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}
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#ifndef OPENSSL_NO_ENGINE
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else if (!strcmp(*args,"-engine"))
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{
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if (!args[1])
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goto argerr;
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engine = *++args;
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}
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#endif
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else if (!strcmp(*args,"-passin"))
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{
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if (!args[1])
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goto argerr;
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passargin = *++args;
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}
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else if (!strcmp (*args, "-to"))
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{
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if (!args[1])
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goto argerr;
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to = *++args;
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}
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else if (!strcmp (*args, "-from"))
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{
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if (!args[1])
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goto argerr;
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from = *++args;
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}
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else if (!strcmp (*args, "-subject"))
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{
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if (!args[1])
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goto argerr;
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subject = *++args;
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}
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else if (!strcmp (*args, "-signer"))
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{
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if (!args[1])
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goto argerr;
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/* If previous -signer argument add signer to list */
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if (signerfile)
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{
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if (!sksigners)
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sksigners = sk_OPENSSL_STRING_new_null();
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sk_OPENSSL_STRING_push(sksigners, signerfile);
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if (!keyfile)
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keyfile = signerfile;
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if (!skkeys)
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skkeys = sk_OPENSSL_STRING_new_null();
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sk_OPENSSL_STRING_push(skkeys, keyfile);
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keyfile = NULL;
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}
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signerfile = *++args;
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}
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else if (!strcmp (*args, "-recip"))
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{
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if (!args[1])
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goto argerr;
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recipfile = *++args;
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}
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else if (!strcmp (*args, "-md"))
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{
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if (!args[1])
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goto argerr;
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sign_md = EVP_get_digestbyname(*++args);
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if (sign_md == NULL)
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{
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BIO_printf(bio_err, "Unknown digest %s\n",
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*args);
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goto argerr;
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}
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}
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else if (!strcmp (*args, "-inkey"))
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{
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if (!args[1])
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goto argerr;
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/* If previous -inkey arument add signer to list */
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if (keyfile)
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{
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if (!signerfile)
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{
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BIO_puts(bio_err, "Illegal -inkey without -signer\n");
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goto argerr;
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}
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if (!sksigners)
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sksigners = sk_OPENSSL_STRING_new_null();
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sk_OPENSSL_STRING_push(sksigners, signerfile);
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signerfile = NULL;
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if (!skkeys)
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skkeys = sk_OPENSSL_STRING_new_null();
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sk_OPENSSL_STRING_push(skkeys, keyfile);
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}
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keyfile = *++args;
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}
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else if (!strcmp (*args, "-keyform"))
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{
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if (!args[1])
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goto argerr;
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keyform = str2fmt(*++args);
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}
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else if (!strcmp (*args, "-certfile"))
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{
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if (!args[1])
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goto argerr;
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certfile = *++args;
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}
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else if (!strcmp (*args, "-CAfile"))
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{
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if (!args[1])
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goto argerr;
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CAfile = *++args;
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}
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else if (!strcmp (*args, "-CApath"))
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{
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if (!args[1])
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goto argerr;
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CApath = *++args;
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}
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else if (!strcmp (*args, "-in"))
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{
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if (!args[1])
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goto argerr;
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infile = *++args;
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}
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else if (!strcmp (*args, "-inform"))
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{
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if (!args[1])
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goto argerr;
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informat = str2fmt(*++args);
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}
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else if (!strcmp (*args, "-outform"))
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{
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if (!args[1])
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goto argerr;
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outformat = str2fmt(*++args);
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}
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else if (!strcmp (*args, "-out"))
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{
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if (!args[1])
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goto argerr;
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outfile = *++args;
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}
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else if (!strcmp (*args, "-content"))
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{
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if (!args[1])
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goto argerr;
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contfile = *++args;
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}
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else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
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continue;
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else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
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badarg = 1;
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args++;
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}
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if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
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{
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BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
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goto argerr;
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}
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if (operation & SMIME_SIGNERS)
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{
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/* Check to see if any final signer needs to be appended */
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if (keyfile && !signerfile)
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{
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BIO_puts(bio_err, "Illegal -inkey without -signer\n");
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goto argerr;
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}
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if (signerfile)
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{
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if (!sksigners)
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sksigners = sk_OPENSSL_STRING_new_null();
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sk_OPENSSL_STRING_push(sksigners, signerfile);
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if (!skkeys)
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skkeys = sk_OPENSSL_STRING_new_null();
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if (!keyfile)
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keyfile = signerfile;
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sk_OPENSSL_STRING_push(skkeys, keyfile);
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}
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if (!sksigners)
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{
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BIO_printf(bio_err, "No signer certificate specified\n");
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badarg = 1;
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}
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signerfile = NULL;
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keyfile = NULL;
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need_rand = 1;
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}
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else if (operation == SMIME_DECRYPT)
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{
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if (!recipfile && !keyfile)
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{
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BIO_printf(bio_err, "No recipient certificate or key specified\n");
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badarg = 1;
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}
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}
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else if (operation == SMIME_ENCRYPT)
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{
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if (!*args)
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{
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BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
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badarg = 1;
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}
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need_rand = 1;
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}
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else if (!operation)
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badarg = 1;
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if (badarg)
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{
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argerr:
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BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
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BIO_printf (bio_err, "where options are\n");
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BIO_printf (bio_err, "-encrypt encrypt message\n");
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BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
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BIO_printf (bio_err, "-sign sign message\n");
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BIO_printf (bio_err, "-verify verify signed message\n");
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BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n");
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#ifndef OPENSSL_NO_DES
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BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
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BIO_printf (bio_err, "-des encrypt with DES\n");
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#endif
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#ifndef OPENSSL_NO_SEED
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BIO_printf (bio_err, "-seed encrypt with SEED\n");
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#endif
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#ifndef OPENSSL_NO_RC2
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BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
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BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
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BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
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#endif
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#ifndef OPENSSL_NO_AES
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BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
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BIO_printf (bio_err, " encrypt PEM output with cbc aes\n");
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#endif
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#ifndef OPENSSL_NO_CAMELLIA
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BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
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BIO_printf (bio_err, " encrypt PEM output with cbc camellia\n");
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#endif
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BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
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BIO_printf (bio_err, "-nosigs don't verify message signature\n");
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BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
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BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
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BIO_printf (bio_err, "-nodetach use opaque signing\n");
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BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
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BIO_printf (bio_err, "-binary don't translate message to text\n");
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BIO_printf (bio_err, "-certfile file other certificates file\n");
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BIO_printf (bio_err, "-signer file signer certificate file\n");
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BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
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BIO_printf (bio_err, "-in file input file\n");
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BIO_printf (bio_err, "-inform arg input format SMIME (default), PEM or DER\n");
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BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
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BIO_printf (bio_err, "-keyform arg input private key format (PEM or ENGINE)\n");
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BIO_printf (bio_err, "-out file output file\n");
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BIO_printf (bio_err, "-outform arg output format SMIME (default), PEM or DER\n");
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BIO_printf (bio_err, "-content file supply or override content for detached signature\n");
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BIO_printf (bio_err, "-to addr to address\n");
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BIO_printf (bio_err, "-from ad from address\n");
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BIO_printf (bio_err, "-subject s subject\n");
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BIO_printf (bio_err, "-text include or delete text MIME headers\n");
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BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
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BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
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BIO_printf (bio_err, "-crl_check check revocation status of signer's certificate using CRLs\n");
|
|
BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
BIO_printf (bio_err, "-engine e use engine e, possibly a hardware device.\n");
|
|
#endif
|
|
BIO_printf (bio_err, "-passin arg input file pass phrase source\n");
|
|
BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
|
|
BIO_printf(bio_err, " load the file (or the files in the directory) into\n");
|
|
BIO_printf(bio_err, " the random number generator\n");
|
|
BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n");
|
|
goto end;
|
|
}
|
|
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
e = setup_engine(bio_err, engine, 0);
|
|
#endif
|
|
|
|
if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
|
|
{
|
|
BIO_printf(bio_err, "Error getting password\n");
|
|
goto end;
|
|
}
|
|
|
|
if (need_rand)
|
|
{
|
|
app_RAND_load_file(NULL, bio_err, (inrand != NULL));
|
|
if (inrand != NULL)
|
|
BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
|
|
app_RAND_load_files(inrand));
|
|
}
|
|
|
|
ret = 2;
|
|
|
|
if (!(operation & SMIME_SIGNERS))
|
|
flags &= ~PKCS7_DETACHED;
|
|
|
|
if (operation & SMIME_OP)
|
|
{
|
|
if (outformat == FORMAT_ASN1)
|
|
outmode = "wb";
|
|
}
|
|
else
|
|
{
|
|
if (flags & PKCS7_BINARY)
|
|
outmode = "wb";
|
|
}
|
|
|
|
if (operation & SMIME_IP)
|
|
{
|
|
if (informat == FORMAT_ASN1)
|
|
inmode = "rb";
|
|
}
|
|
else
|
|
{
|
|
if (flags & PKCS7_BINARY)
|
|
inmode = "rb";
|
|
}
|
|
|
|
if (operation == SMIME_ENCRYPT)
|
|
{
|
|
if (!cipher)
|
|
{
|
|
#ifndef OPENSSL_NO_RC2
|
|
cipher = EVP_rc2_40_cbc();
|
|
#else
|
|
BIO_printf(bio_err, "No cipher selected\n");
|
|
goto end;
|
|
#endif
|
|
}
|
|
encerts = sk_X509_new_null();
|
|
while (*args)
|
|
{
|
|
if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
|
|
NULL, e, "recipient certificate file")))
|
|
{
|
|
#if 0 /* An appropriate message is already printed */
|
|
BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
|
|
#endif
|
|
goto end;
|
|
}
|
|
sk_X509_push(encerts, cert);
|
|
cert = NULL;
|
|
args++;
|
|
}
|
|
}
|
|
|
|
if (certfile)
|
|
{
|
|
if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
|
|
e, "certificate file")))
|
|
{
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (recipfile && (operation == SMIME_DECRYPT))
|
|
{
|
|
if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
|
|
e, "recipient certificate file")))
|
|
{
|
|
ERR_print_errors(bio_err);
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (operation == SMIME_DECRYPT)
|
|
{
|
|
if (!keyfile)
|
|
keyfile = recipfile;
|
|
}
|
|
else if (operation == SMIME_SIGN)
|
|
{
|
|
if (!keyfile)
|
|
keyfile = signerfile;
|
|
}
|
|
else keyfile = NULL;
|
|
|
|
if (keyfile)
|
|
{
|
|
key = load_key(bio_err, keyfile, keyform, 0, passin, e,
|
|
"signing key file");
|
|
if (!key)
|
|
goto end;
|
|
}
|
|
|
|
if (infile)
|
|
{
|
|
if (!(in = BIO_new_file(infile, inmode)))
|
|
{
|
|
BIO_printf (bio_err,
|
|
"Can't open input file %s\n", infile);
|
|
goto end;
|
|
}
|
|
}
|
|
else
|
|
in = BIO_new_fp(stdin, BIO_NOCLOSE);
|
|
|
|
if (operation & SMIME_IP)
|
|
{
|
|
if (informat == FORMAT_SMIME)
|
|
p7 = SMIME_read_PKCS7(in, &indata);
|
|
else if (informat == FORMAT_PEM)
|
|
p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
|
|
else if (informat == FORMAT_ASN1)
|
|
p7 = d2i_PKCS7_bio(in, NULL);
|
|
else
|
|
{
|
|
BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
|
|
goto end;
|
|
}
|
|
|
|
if (!p7)
|
|
{
|
|
BIO_printf(bio_err, "Error reading S/MIME message\n");
|
|
goto end;
|
|
}
|
|
if (contfile)
|
|
{
|
|
BIO_free(indata);
|
|
if (!(indata = BIO_new_file(contfile, "rb")))
|
|
{
|
|
BIO_printf(bio_err, "Can't read content file %s\n", contfile);
|
|
goto end;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (outfile)
|
|
{
|
|
if (!(out = BIO_new_file(outfile, outmode)))
|
|
{
|
|
BIO_printf (bio_err,
|
|
"Can't open output file %s\n", outfile);
|
|
goto end;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
out = BIO_new_fp(stdout, BIO_NOCLOSE);
|
|
#ifdef OPENSSL_SYS_VMS
|
|
{
|
|
BIO *tmpbio = BIO_new(BIO_f_linebuffer());
|
|
out = BIO_push(tmpbio, out);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (operation == SMIME_VERIFY)
|
|
{
|
|
if (!(store = setup_verify(bio_err, CAfile, CApath)))
|
|
goto end;
|
|
X509_STORE_set_verify_cb(store, smime_cb);
|
|
if (vpm)
|
|
X509_STORE_set1_param(store, vpm);
|
|
}
|
|
|
|
|
|
ret = 3;
|
|
|
|
if (operation == SMIME_ENCRYPT)
|
|
{
|
|
if (indef)
|
|
flags |= PKCS7_STREAM;
|
|
p7 = PKCS7_encrypt(encerts, in, cipher, flags);
|
|
}
|
|
else if (operation & SMIME_SIGNERS)
|
|
{
|
|
int i;
|
|
/* If detached data content we only enable streaming if
|
|
* S/MIME output format.
|
|
*/
|
|
if (operation == SMIME_SIGN)
|
|
{
|
|
if (flags & PKCS7_DETACHED)
|
|
{
|
|
if (outformat == FORMAT_SMIME)
|
|
flags |= PKCS7_STREAM;
|
|
}
|
|
else if (indef)
|
|
flags |= PKCS7_STREAM;
|
|
flags |= PKCS7_PARTIAL;
|
|
p7 = PKCS7_sign(NULL, NULL, other, in, flags);
|
|
if (!p7)
|
|
goto end;
|
|
}
|
|
else
|
|
flags |= PKCS7_REUSE_DIGEST;
|
|
for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++)
|
|
{
|
|
signerfile = sk_OPENSSL_STRING_value(sksigners, i);
|
|
keyfile = sk_OPENSSL_STRING_value(skkeys, i);
|
|
signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
|
|
e, "signer certificate");
|
|
if (!signer)
|
|
goto end;
|
|
key = load_key(bio_err, keyfile, keyform, 0, passin, e,
|
|
"signing key file");
|
|
if (!key)
|
|
goto end;
|
|
if (!PKCS7_sign_add_signer(p7, signer, key,
|
|
sign_md, flags))
|
|
goto end;
|
|
X509_free(signer);
|
|
signer = NULL;
|
|
EVP_PKEY_free(key);
|
|
key = NULL;
|
|
}
|
|
/* If not streaming or resigning finalize structure */
|
|
if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
|
|
{
|
|
if (!PKCS7_final(p7, in, flags))
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (!p7)
|
|
{
|
|
BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
|
|
goto end;
|
|
}
|
|
|
|
ret = 4;
|
|
if (operation == SMIME_DECRYPT)
|
|
{
|
|
if (!PKCS7_decrypt(p7, key, recip, out, flags))
|
|
{
|
|
BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
|
|
goto end;
|
|
}
|
|
}
|
|
else if (operation == SMIME_VERIFY)
|
|
{
|
|
STACK_OF(X509) *signers;
|
|
if (PKCS7_verify(p7, other, store, indata, out, flags))
|
|
BIO_printf(bio_err, "Verification successful\n");
|
|
else
|
|
{
|
|
BIO_printf(bio_err, "Verification failure\n");
|
|
goto end;
|
|
}
|
|
signers = PKCS7_get0_signers(p7, other, flags);
|
|
if (!save_certs(signerfile, signers))
|
|
{
|
|
BIO_printf(bio_err, "Error writing signers to %s\n",
|
|
signerfile);
|
|
ret = 5;
|
|
goto end;
|
|
}
|
|
sk_X509_free(signers);
|
|
}
|
|
else if (operation == SMIME_PK7OUT)
|
|
PEM_write_bio_PKCS7(out, p7);
|
|
else
|
|
{
|
|
if (to)
|
|
BIO_printf(out, "To: %s\n", to);
|
|
if (from)
|
|
BIO_printf(out, "From: %s\n", from);
|
|
if (subject)
|
|
BIO_printf(out, "Subject: %s\n", subject);
|
|
if (outformat == FORMAT_SMIME)
|
|
{
|
|
if (operation == SMIME_RESIGN)
|
|
SMIME_write_PKCS7(out, p7, indata, flags);
|
|
else
|
|
SMIME_write_PKCS7(out, p7, in, flags);
|
|
}
|
|
else if (outformat == FORMAT_PEM)
|
|
PEM_write_bio_PKCS7_stream(out, p7, in, flags);
|
|
else if (outformat == FORMAT_ASN1)
|
|
i2d_PKCS7_bio_stream(out,p7, in, flags);
|
|
else
|
|
{
|
|
BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
|
|
goto end;
|
|
}
|
|
}
|
|
ret = 0;
|
|
end:
|
|
if (need_rand)
|
|
app_RAND_write_file(NULL, bio_err);
|
|
if (ret) ERR_print_errors(bio_err);
|
|
sk_X509_pop_free(encerts, X509_free);
|
|
sk_X509_pop_free(other, X509_free);
|
|
if (vpm)
|
|
X509_VERIFY_PARAM_free(vpm);
|
|
if (sksigners)
|
|
sk_OPENSSL_STRING_free(sksigners);
|
|
if (skkeys)
|
|
sk_OPENSSL_STRING_free(skkeys);
|
|
X509_STORE_free(store);
|
|
X509_free(cert);
|
|
X509_free(recip);
|
|
X509_free(signer);
|
|
EVP_PKEY_free(key);
|
|
PKCS7_free(p7);
|
|
BIO_free(in);
|
|
BIO_free(indata);
|
|
BIO_free_all(out);
|
|
if (passin) OPENSSL_free(passin);
|
|
return (ret);
|
|
}
|
|
|
|
static int save_certs(char *signerfile, STACK_OF(X509) *signers)
|
|
{
|
|
int i;
|
|
BIO *tmp;
|
|
if (!signerfile)
|
|
return 1;
|
|
tmp = BIO_new_file(signerfile, "w");
|
|
if (!tmp) return 0;
|
|
for(i = 0; i < sk_X509_num(signers); i++)
|
|
PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
|
|
BIO_free(tmp);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* Minimal callback just to output policy info (if any) */
|
|
|
|
static int smime_cb(int ok, X509_STORE_CTX *ctx)
|
|
{
|
|
int error;
|
|
|
|
error = X509_STORE_CTX_get_error(ctx);
|
|
|
|
if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
|
|
&& ((error != X509_V_OK) || (ok != 2)))
|
|
return ok;
|
|
|
|
policies_print(NULL, ctx);
|
|
|
|
return ok;
|
|
|
|
}
|