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openssl/apps/cms.c
Dr. Stephen Henson c220e58f9e Make 3DES default cipher in cms utility.
2008-03-18 19:03:03 +00:00

952 lines
24 KiB
C
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/* apps/cms.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2008 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.
* ====================================================================
*/
/* CMS utility function */
#include <stdio.h>
#include <string.h>
#include "apps.h"
#ifndef OPENSSL_NO_CMS
#include <openssl/crypto.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/x509_vfy.h>
#include <openssl/x509v3.h>
#include <openssl/cms.h>
#undef PROG
#define PROG cms_main
static int save_certs(char *signerfile, STACK_OF(X509) *signers);
static int smime_cb(int ok, X509_STORE_CTX *ctx);
#define SMIME_OP 0x10
#define SMIME_IP 0x20
#define SMIME_SIGNERS 0x40
#define SMIME_ENCRYPT (1 | SMIME_OP)
#define SMIME_DECRYPT (2 | SMIME_IP)
#define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
#define SMIME_VERIFY (4 | SMIME_IP)
#define SMIME_CMSOUT (5 | SMIME_IP | SMIME_OP)
#define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
#define SMIME_DATAOUT (7 | SMIME_IP)
#define SMIME_DATA_CREATE (8 | SMIME_OP)
#define SMIME_DIGEST_VERIFY (9 | SMIME_IP)
#define SMIME_DIGEST_CREATE (10 | SMIME_OP)
#define SMIME_UNCOMPRESS (11 | SMIME_IP)
#define SMIME_COMPRESS (12 | SMIME_OP)
#define SMIME_ENCRYPTED_DECRYPT (13 | SMIME_IP)
#define SMIME_ENCRYPTED_ENCRYPT (14 | SMIME_OP)
int MAIN(int, char **);
int MAIN(int argc, char **argv)
{
ENGINE *e = NULL;
int operation = 0;
int ret = 0;
char **args;
const char *inmode = "r", *outmode = "w";
char *infile = NULL, *outfile = NULL;
char *signerfile = NULL, *recipfile = NULL;
STACK *sksigners = NULL, *skkeys = NULL;
char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
const EVP_CIPHER *cipher = NULL;
CMS_ContentInfo *cms = NULL;
X509_STORE *store = NULL;
X509 *cert = NULL, *recip = NULL, *signer = NULL;
EVP_PKEY *key = NULL;
STACK_OF(X509) *encerts = NULL, *other = NULL;
BIO *in = NULL, *out = NULL, *indata = NULL;
int badarg = 0;
int flags = CMS_DETACHED;
char *to = NULL, *from = NULL, *subject = NULL;
char *CAfile = NULL, *CApath = NULL;
char *passargin = NULL, *passin = NULL;
char *inrand = NULL;
int need_rand = 0;
const EVP_MD *sign_md = NULL;
int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
int keyform = FORMAT_PEM;
#ifndef OPENSSL_NO_ENGINE
char *engine=NULL;
#endif
unsigned char *secret_key = NULL;
size_t secret_keylen = 0;
X509_VERIFY_PARAM *vpm = NULL;
args = argv + 1;
ret = 1;
apps_startup();
if (bio_err == NULL)
{
if ((bio_err = BIO_new(BIO_s_file())) != NULL)
BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
}
if (!load_config(bio_err, NULL))
goto end;
while (!badarg && *args && *args[0] == '-')
{
if (!strcmp (*args, "-encrypt"))
operation = SMIME_ENCRYPT;
else if (!strcmp (*args, "-decrypt"))
operation = SMIME_DECRYPT;
else if (!strcmp (*args, "-sign"))
operation = SMIME_SIGN;
else if (!strcmp (*args, "-resign"))
operation = SMIME_RESIGN;
else if (!strcmp (*args, "-verify"))
operation = SMIME_VERIFY;
else if (!strcmp (*args, "-cmsout"))
operation = SMIME_CMSOUT;
else if (!strcmp (*args, "-data_out"))
operation = SMIME_DATAOUT;
else if (!strcmp (*args, "-data_create"))
operation = SMIME_DATA_CREATE;
else if (!strcmp (*args, "-digest_verify"))
operation = SMIME_DIGEST_VERIFY;
else if (!strcmp (*args, "-digest_create"))
operation = SMIME_DIGEST_CREATE;
else if (!strcmp (*args, "-compress"))
operation = SMIME_COMPRESS;
else if (!strcmp (*args, "-uncompress"))
operation = SMIME_UNCOMPRESS;
else if (!strcmp (*args, "-EncryptedData_decrypt"))
operation = SMIME_ENCRYPTED_DECRYPT;
else if (!strcmp (*args, "-EncryptedData_encrypt"))
operation = SMIME_ENCRYPTED_ENCRYPT;
#ifndef OPENSSL_NO_DES
else if (!strcmp (*args, "-des3"))
cipher = EVP_des_ede3_cbc();
else if (!strcmp (*args, "-des"))
cipher = EVP_des_cbc();
#endif
#ifndef OPENSSL_NO_SEED
else if (!strcmp (*args, "-seed"))
cipher = EVP_seed_cbc();
#endif
#ifndef OPENSSL_NO_RC2
else if (!strcmp (*args, "-rc2-40"))
cipher = EVP_rc2_40_cbc();
else if (!strcmp (*args, "-rc2-128"))
cipher = EVP_rc2_cbc();
else if (!strcmp (*args, "-rc2-64"))
cipher = EVP_rc2_64_cbc();
#endif
#ifndef OPENSSL_NO_AES
else if (!strcmp(*args,"-aes128"))
cipher = EVP_aes_128_cbc();
else if (!strcmp(*args,"-aes192"))
cipher = EVP_aes_192_cbc();
else if (!strcmp(*args,"-aes256"))
cipher = EVP_aes_256_cbc();
#endif
#ifndef OPENSSL_NO_CAMELLIA
else if (!strcmp(*args,"-camellia128"))
cipher = EVP_camellia_128_cbc();
else if (!strcmp(*args,"-camellia192"))
cipher = EVP_camellia_192_cbc();
else if (!strcmp(*args,"-camellia256"))
cipher = EVP_camellia_256_cbc();
#endif
else if (!strcmp (*args, "-text"))
flags |= CMS_TEXT;
else if (!strcmp (*args, "-nointern"))
flags |= CMS_NOINTERN;
else if (!strcmp (*args, "-noverify")
|| !strcmp (*args, "-no_signer_cert_verify"))
flags |= CMS_NO_SIGNER_CERT_VERIFY;
else if (!strcmp (*args, "-nocerts"))
flags |= CMS_NOCERTS;
else if (!strcmp (*args, "-noattr"))
flags |= CMS_NOATTR;
else if (!strcmp (*args, "-nodetach"))
flags &= ~CMS_DETACHED;
else if (!strcmp (*args, "-nosmimecap"))
flags |= CMS_NOSMIMECAP;
else if (!strcmp (*args, "-binary"))
flags |= CMS_BINARY;
else if (!strcmp (*args, "-keyid"))
flags |= CMS_USE_KEYID;
else if (!strcmp (*args, "-nosigs"))
flags |= CMS_NOSIGS;
else if (!strcmp (*args, "-no_content_verify"))
flags |= CMS_NO_CONTENT_VERIFY;
else if (!strcmp (*args, "-no_attr_verify"))
flags |= CMS_NO_ATTR_VERIFY;
else if (!strcmp (*args, "-stream"))
flags |= CMS_STREAM;
else if (!strcmp (*args, "-indef"))
flags |= CMS_STREAM;
else if (!strcmp (*args, "-noindef"))
flags &= ~CMS_STREAM;
else if (!strcmp (*args, "-nooldmime"))
flags |= CMS_NOOLDMIMETYPE;
else if (!strcmp (*args, "-crlfeol"))
flags |= CMS_CRLFEOL;
else if (!strcmp(*args,"-secretkey"))
{
long ltmp;
if (!args[1])
goto argerr;
args++;
secret_key = string_to_hex(*args, &ltmp);
if (!secret_key)
{
BIO_printf(bio_err, "Invalid key %s\n", *args);
goto argerr;
}
secret_keylen = (size_t)ltmp;
}
else if (!strcmp(*args,"-rand"))
{
if (!args[1])
goto argerr;
args++;
inrand = *args;
need_rand = 1;
}
#ifndef OPENSSL_NO_ENGINE
else if (!strcmp(*args,"-engine"))
{
if (!args[1])
goto argerr;
engine = *++args;
}
#endif
else if (!strcmp(*args,"-passin"))
{
if (!args[1])
goto argerr;
passargin = *++args;
}
else if (!strcmp (*args, "-to"))
{
if (!args[1])
goto argerr;
to = *++args;
}
else if (!strcmp (*args, "-from"))
{
if (!args[1])
goto argerr;
from = *++args;
}
else if (!strcmp (*args, "-subject"))
{
if (!args[1])
goto argerr;
subject = *++args;
}
else if (!strcmp (*args, "-signer"))
{
if (!args[1])
goto argerr;
/* If previous -signer argument add signer to list */
if (signerfile)
{
if (!sksigners)
sksigners = sk_new_null();
sk_push(sksigners, signerfile);
if (!keyfile)
keyfile = signerfile;
if (!skkeys)
skkeys = sk_new_null();
sk_push(skkeys, keyfile);
keyfile = NULL;
}
signerfile = *++args;
}
else if (!strcmp (*args, "-recip"))
{
if (!args[1])
goto argerr;
recipfile = *++args;
}
else if (!strcmp (*args, "-md"))
{
if (!args[1])
goto argerr;
sign_md = EVP_get_digestbyname(*++args);
if (sign_md == NULL)
{
BIO_printf(bio_err, "Unknown digest %s\n",
*args);
goto argerr;
}
}
else if (!strcmp (*args, "-inkey"))
{
if (!args[1])
goto argerr;
/* If previous -inkey arument add signer to list */
if (keyfile)
{
if (!signerfile)
{
BIO_puts(bio_err, "Illegal -inkey without -signer\n");
goto argerr;
}
if (!sksigners)
sksigners = sk_new_null();
sk_push(sksigners, signerfile);
signerfile = NULL;
if (!skkeys)
skkeys = sk_new_null();
sk_push(skkeys, keyfile);
}
keyfile = *++args;
}
else if (!strcmp (*args, "-keyform"))
{
if (!args[1])
goto argerr;
keyform = str2fmt(*++args);
}
else if (!strcmp (*args, "-certfile"))
{
if (!args[1])
goto argerr;
certfile = *++args;
}
else if (!strcmp (*args, "-CAfile"))
{
if (!args[1])
goto argerr;
CAfile = *++args;
}
else if (!strcmp (*args, "-CApath"))
{
if (!args[1])
goto argerr;
CApath = *++args;
}
else if (!strcmp (*args, "-in"))
{
if (!args[1])
goto argerr;
infile = *++args;
}
else if (!strcmp (*args, "-inform"))
{
if (!args[1])
goto argerr;
informat = str2fmt(*++args);
}
else if (!strcmp (*args, "-outform"))
{
if (!args[1])
goto argerr;
outformat = str2fmt(*++args);
}
else if (!strcmp (*args, "-out"))
{
if (!args[1])
goto argerr;
outfile = *++args;
}
else if (!strcmp (*args, "-content"))
{
if (!args[1])
goto argerr;
contfile = *++args;
}
else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
continue;
else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
badarg = 1;
args++;
}
if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
{
BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
goto argerr;
}
if (operation & SMIME_SIGNERS)
{
/* Check to see if any final signer needs to be appended */
if (keyfile && !signerfile)
{
BIO_puts(bio_err, "Illegal -inkey without -signer\n");
goto argerr;
}
if (signerfile)
{
if (!sksigners)
sksigners = sk_new_null();
sk_push(sksigners, signerfile);
if (!skkeys)
skkeys = sk_new_null();
if (!keyfile)
keyfile = signerfile;
sk_push(skkeys, keyfile);
}
if (!sksigners)
{
BIO_printf(bio_err, "No signer certificate specified\n");
badarg = 1;
}
signerfile = NULL;
keyfile = NULL;
need_rand = 1;
}
else if (operation == SMIME_DECRYPT)
{
if (!recipfile && !keyfile)
{
BIO_printf(bio_err, "No recipient certificate or key specified\n");
badarg = 1;
}
}
else if (operation == SMIME_ENCRYPT)
{
if (!*args)
{
BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
badarg = 1;
}
need_rand = 1;
}
else if (!operation)
badarg = 1;
if (badarg)
{
argerr:
BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
BIO_printf (bio_err, "where options are\n");
BIO_printf (bio_err, "-encrypt encrypt message\n");
BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
BIO_printf (bio_err, "-sign sign message\n");
BIO_printf (bio_err, "-verify verify signed message\n");
BIO_printf (bio_err, "-cmsout output CMS structure\n");
#ifndef OPENSSL_NO_DES
BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
BIO_printf (bio_err, "-des encrypt with DES\n");
#endif
#ifndef OPENSSL_NO_SEED
BIO_printf (bio_err, "-seed encrypt with SEED\n");
#endif
#ifndef OPENSSL_NO_RC2
BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
#endif
#ifndef OPENSSL_NO_AES
BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
BIO_printf (bio_err, " encrypt PEM output with cbc aes\n");
#endif
#ifndef OPENSSL_NO_CAMELLIA
BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
BIO_printf (bio_err, " encrypt PEM output with cbc camellia\n");
#endif
BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
BIO_printf (bio_err, "-nosigs don't verify message signature\n");
BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
BIO_printf (bio_err, "-nodetach use opaque signing\n");
BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
BIO_printf (bio_err, "-binary don't translate message to text\n");
BIO_printf (bio_err, "-certfile file other certificates file\n");
BIO_printf (bio_err, "-signer file signer certificate file\n");
BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
BIO_printf (bio_err, "-skeyid use subject key identifier\n");
BIO_printf (bio_err, "-in file input file\n");
BIO_printf (bio_err, "-inform arg input format SMIME (default), PEM or DER\n");
BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
BIO_printf (bio_err, "-keyform arg input private key format (PEM or ENGINE)\n");
BIO_printf (bio_err, "-out file output file\n");
BIO_printf (bio_err, "-outform arg output format SMIME (default), PEM or DER\n");
BIO_printf (bio_err, "-content file supply or override content for detached signature\n");
BIO_printf (bio_err, "-to addr to address\n");
BIO_printf (bio_err, "-from ad from address\n");
BIO_printf (bio_err, "-subject s subject\n");
BIO_printf (bio_err, "-text include or delete text MIME headers\n");
BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
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 &= ~CMS_DETACHED;
if (operation & SMIME_OP)
{
if (outformat == FORMAT_ASN1)
outmode = "wb";
}
else
{
if (flags & CMS_BINARY)
outmode = "wb";
}
if (operation & SMIME_IP)
{
if (informat == FORMAT_ASN1)
inmode = "rb";
}
else
{
if (flags & CMS_BINARY)
inmode = "rb";
}
if (operation == SMIME_ENCRYPT)
{
if (!cipher)
{
#ifndef OPENSSL_NO_DES
cipher = EVP_des_ede3_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)
cms = SMIME_read_CMS(in, &indata);
else if (informat == FORMAT_PEM)
cms = PEM_read_bio_CMS(in, NULL, NULL, NULL);
else if (informat == FORMAT_ASN1)
cms = d2i_CMS_bio(in, NULL);
else
{
BIO_printf(bio_err, "Bad input format for CMS file\n");
goto end;
}
if (!cms)
{
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_func(store, smime_cb);
if (vpm)
X509_STORE_set1_param(store, vpm);
}
ret = 3;
if (operation == SMIME_DATA_CREATE)
{
cms = CMS_data_create(in, flags);
}
else if (operation == SMIME_DIGEST_CREATE)
{
cms = CMS_digest_create(in, sign_md, flags);
}
else if (operation == SMIME_COMPRESS)
{
cms = CMS_compress(in, -1, flags);
}
else if (operation == SMIME_ENCRYPT)
{
cms = CMS_encrypt(encerts, in, cipher, flags);
}
else if (operation == SMIME_ENCRYPTED_ENCRYPT)
{
cms = CMS_EncryptedData_encrypt(in, cipher,
secret_key, secret_keylen,
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 & CMS_DETACHED)
{
if (outformat != FORMAT_SMIME)
flags &= ~CMS_STREAM;
}
flags |= CMS_PARTIAL;
cms = CMS_sign(NULL, NULL, other, in, flags);
if (!cms)
goto end;
}
else
flags |= CMS_REUSE_DIGEST;
for (i = 0; i < sk_num(sksigners); i++)
{
signerfile = sk_value(sksigners, i);
keyfile = sk_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 (!CMS_add1_signer(cms, 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 & CMS_STREAM))
{
if (!CMS_final(cms, in, flags))
goto end;
}
}
if (!cms)
{
BIO_printf(bio_err, "Error creating CMS structure\n");
goto end;
}
ret = 4;
if (operation == SMIME_DECRYPT)
{
if (!CMS_decrypt(cms, key, recip, indata, out, flags))
{
BIO_printf(bio_err, "Error decrypting CMS structure\n");
goto end;
}
}
else if (operation == SMIME_DATAOUT)
{
if (!CMS_data(cms, out, flags))
goto end;
}
else if (operation == SMIME_UNCOMPRESS)
{
if (!CMS_uncompress(cms, indata, out, flags))
goto end;
}
else if (operation == SMIME_DIGEST_VERIFY)
{
if (CMS_digest_verify(cms, indata, out, flags) > 0)
BIO_printf(bio_err, "Verification successful\n");
else
{
BIO_printf(bio_err, "Verification failure\n");
goto end;
}
}
else if (operation == SMIME_ENCRYPTED_DECRYPT)
{
if (!CMS_EncryptedData_decrypt(cms, secret_key, secret_keylen,
indata, out, flags))
goto end;
}
else if (operation == SMIME_VERIFY)
{
if (CMS_verify(cms, other, store, indata, out, flags) > 0)
BIO_printf(bio_err, "Verification successful\n");
else
{
BIO_printf(bio_err, "Verification failure\n");
goto end;
}
if (signerfile)
{
STACK_OF(X509) *signers;
signers = CMS_get0_signers(cms);
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 (outformat == FORMAT_SMIME)
{
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 (operation == SMIME_RESIGN)
ret = SMIME_write_CMS(out, cms, indata, flags);
else
ret = SMIME_write_CMS(out, cms, in, flags);
}
else if (outformat == FORMAT_PEM)
ret = PEM_write_bio_CMS_stream(out, cms, in, flags);
else if (outformat == FORMAT_ASN1)
ret = i2d_CMS_bio_stream(out,cms, in, flags);
else
{
BIO_printf(bio_err, "Bad output format for CMS file\n");
goto end;
}
if (ret <= 0)
{
ret = 6;
goto end;
}
}
ret = 0;
end:
if (ret)
ERR_print_errors(bio_err);
if (need_rand)
app_RAND_write_file(NULL, 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_free(sksigners);
if (skkeys)
sk_free(skkeys);
if (secret_key)
OPENSSL_free(secret_key);
X509_STORE_free(store);
X509_free(cert);
X509_free(recip);
X509_free(signer);
EVP_PKEY_free(key);
CMS_ContentInfo_free(cms);
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;
}
#endif
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