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cms.c

/* 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 cms_cb(int ok, X509_STORE_CTX *ctx);
static void receipt_request_print(BIO *out, CMS_ContentInfo *cms);
static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
                                                STACK *rr_from);

#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)
#define SMIME_SIGN_RECEIPT    (15 | SMIME_IP | SMIME_OP)
#define SMIME_VERIFY_RECEIPT  (16 | SMIME_IP)

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, *rctfile = NULL;
      char *signerfile = NULL, *recipfile = NULL;
      STACK *sksigners = NULL, *skkeys = NULL;
      char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
      char *certsoutfile = NULL;
      const EVP_CIPHER *cipher = NULL;
      CMS_ContentInfo *cms = NULL, *rcms = 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, *rctin = NULL;
      int badarg = 0;
      int flags = CMS_DETACHED;
      int rr_print = 0, rr_allorfirst = -1;
      STACK *rr_to = NULL, *rr_from = NULL;
      CMS_ReceiptRequest *rr = NULL;
      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 rctformat = FORMAT_SMIME, keyform = FORMAT_PEM;
#ifndef OPENSSL_NO_ENGINE
      char *engine=NULL;
#endif
      unsigned char *secret_key = NULL, *secret_keyid = NULL;
      size_t secret_keylen = 0, secret_keyidlen = 0;

      ASN1_OBJECT *econtent_type = NULL;

      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, "-sign_receipt"))
                  operation = SMIME_SIGN_RECEIPT;
            else if (!strcmp (*args, "-resign"))
                  operation = SMIME_RESIGN;
            else if (!strcmp (*args, "-verify"))
                  operation = SMIME_VERIFY;
            else if (!strcmp(*args,"-verify_receipt"))
                  {
                  operation = SMIME_VERIFY_RECEIPT;
                  if (!args[1])
                        goto argerr;
                  args++;
                  rctfile = *args;
                  }
            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"))
                        {
                        args++;
                        continue;
                        }
            else if (!strcmp (*args, "-indef"))
                        {
                        args++;
                        continue;
                        }
            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, "-receipt_request_print"))
                        rr_print = 1;
            else if (!strcmp (*args, "-receipt_request_all"))
                        rr_allorfirst = 0;
            else if (!strcmp (*args, "-receipt_request_first"))
                        rr_allorfirst = 1;
            else if (!strcmp(*args,"-receipt_request_from"))
                  {
                  if (!args[1])
                        goto argerr;
                  args++;
                  if (!rr_from)
                        rr_from = sk_new_null();
                  sk_push(rr_from, *args);
                  }
            else if (!strcmp(*args,"-receipt_request_to"))
                  {
                  if (!args[1])
                        goto argerr;
                  args++;
                  if (!rr_to)
                        rr_to = sk_new_null();
                  sk_push(rr_to, *args);
                  }
            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,"-secretkeyid"))
                  {
                  long ltmp;
                  if (!args[1])
                        goto argerr;
                  args++;
                  secret_keyid = string_to_hex(*args, &ltmp);
                  if (!secret_keyid)
                        {
                        BIO_printf(bio_err, "Invalid id %s\n", *args);
                        goto argerr;
                        }
                  secret_keyidlen = (size_t)ltmp;
                  }
            else if (!strcmp(*args,"-econtent_type"))
                  {
                  if (!args[1])
                        goto argerr;
                  args++;
                  econtent_type = OBJ_txt2obj(*args, 0);
                  if (!econtent_type)
                        {
                        BIO_printf(bio_err, "Invalid OID %s\n", *args);
                        goto argerr;
                        }
                  }
            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, "-certsout"))
                  {
                  if (!args[1])
                        goto argerr;
                  certsoutfile = *++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, "-rctform"))
                  {
                  if (!args[1])
                        goto argerr;
                  rctformat = 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 (((rr_allorfirst != -1) || rr_from) && !rr_to)
            {
            BIO_puts(bio_err, "No Signed Receipts Recipients\n");
            goto argerr;
            }

      if (!(operation & SMIME_SIGNERS)  && (rr_to || rr_from))
            {
            BIO_puts(bio_err, "Signed receipts only allowed with -sign\n");
            goto argerr;
            }
      if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
            {
            BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
            goto argerr;
            }

      if (operation & SMIME_SIGNERS)
            {
            if (keyfile && !signerfile)
                  {
                  BIO_puts(bio_err, "Illegal -inkey without -signer\n");
                  goto argerr;
                  }
            /* Check to see if any final signer needs to be appended */
            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 && !secret_key)
                  {
                  BIO_printf(bio_err, "No recipient certificate or key specified\n");
                  badarg = 1;
                  }
            }
      else if (operation == SMIME_ENCRYPT)
            {
            if (!*args && !secret_key)
                  {
                  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 cms [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, "-certsout file certificate output 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
                  }

            if (secret_key && !secret_keyid)
                  {
                  BIO_printf(bio_err, "No sectre key id\n");
                  goto end;
                  }

            if (*args)
                  encerts = sk_X509_new_null();
            while (*args)
                  {
                  if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
                        NULL, e, "recipient certificate file")))
                        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_SIGN_RECEIPT)
            {
            if (!(signer = load_cert(bio_err,signerfile,FORMAT_PEM,NULL,
                  e, "receipt signer certificate file")))
                  {
                  ERR_print_errors(bio_err);
                  goto end;
                  }
            }

      if (operation == SMIME_DECRYPT)
            {
            if (!keyfile)
                  keyfile = recipfile;
            }
      else if ((operation == SMIME_SIGN) || (operation == SMIME_SIGN_RECEIPT))
            {
            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 (certsoutfile)
                  {
                  STACK_OF(X509) *allcerts;
                  allcerts = CMS_get1_certs(cms);
                  if (!save_certs(certsoutfile, allcerts))
                        {
                        BIO_printf(bio_err,
                                    "Error writing certs to %s\n",
                                                certsoutfile);
                        ret = 5;
                        goto end;
                        }
                  sk_X509_pop_free(allcerts, X509_free);
                  }
            }

      if (rctfile)
            {
            char *rctmode = (rctformat == FORMAT_ASN1) ? "rb" : "r";
            if (!(rctin = BIO_new_file(rctfile, rctmode)))
                  {
                  BIO_printf (bio_err,
                         "Can't open receipt file %s\n", rctfile);
                  goto end;
                  }
            
            if (rctformat == FORMAT_SMIME) 
                  rcms = SMIME_read_CMS(rctin, NULL);
            else if (rctformat == FORMAT_PEM) 
                  rcms = PEM_read_bio_CMS(rctin, NULL, NULL, NULL);
            else if (rctformat == FORMAT_ASN1) 
                  rcms = d2i_CMS_bio(rctin, NULL);
            else
                  {
                  BIO_printf(bio_err, "Bad input format for receipt\n");
                  goto end;
                  }

            if (!rcms)
                  {
                  BIO_printf(bio_err, "Error reading receipt\n");
                  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) || (operation == SMIME_VERIFY_RECEIPT))
            {
            if (!(store = setup_verify(bio_err, CAfile, CApath)))
                  goto end;
            X509_STORE_set_verify_cb_func(store, cms_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)
            {
            flags |= CMS_PARTIAL;
            cms = CMS_encrypt(encerts, in, cipher, flags);
            if (!cms)
                  goto end;
            if (secret_key)
                  {
                  if (!CMS_add0_recipient_key(cms, NID_undef, 
                                    secret_key, secret_keylen,
                                    secret_keyid, secret_keyidlen,
                                    NULL, NULL, NULL))
                        goto end;
                  /* NULL these because call absorbs them */
                  secret_key = NULL;
                  secret_keyid = NULL;
                  }
            if (!(flags & CMS_STREAM))
                  {
                  if (!CMS_final(cms, in, NULL, flags))
                        goto end;
                  }
            }
      else if (operation == SMIME_ENCRYPTED_ENCRYPT)
            {
            cms = CMS_EncryptedData_encrypt(in, cipher,
                                    secret_key, secret_keylen,
                                    flags);

            }
      else if (operation == SMIME_SIGN_RECEIPT)
            {
            CMS_ContentInfo *srcms = NULL;
            STACK_OF(CMS_SignerInfo) *sis;
            CMS_SignerInfo *si;
            sis = CMS_get0_SignerInfos(cms);
            if (!sis)
                  goto end;
            si = sk_CMS_SignerInfo_value(sis, 0);
            srcms = CMS_sign_receipt(si, signer, key, other, flags);
            if (!srcms)
                  goto end;
            CMS_ContentInfo_free(cms);
            cms = srcms;
            }
      else if (operation & SMIME_SIGNERS)
            {
            int i;
            /* If detached data content we 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;
                  if (econtent_type)
                        CMS_set1_eContentType(cms, econtent_type);

                  if (rr_to)
                        {
                        rr = make_receipt_request(rr_to, rr_allorfirst,
                                                rr_from);
                        if (!rr)
                              {
                              BIO_puts(bio_err,
                        "Signed Receipt Request Creation Error\n");
                              goto end;
                              }
                        }
                  }
            else
                  flags |= CMS_REUSE_DIGEST;
            for (i = 0; i < sk_num(sksigners); i++)
                  {
                  CMS_SignerInfo *si;
                  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;
                  si = CMS_add1_signer(cms, signer, key, sign_md, flags);
                  if (!si)
                        goto end;
                  if (rr && !CMS_add1_ReceiptRequest(si, rr))
                        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, NULL, flags))
                        goto end;
                  }
            }

      if (!cms)
            {
            BIO_printf(bio_err, "Error creating CMS structure\n");
            goto end;
            }

      ret = 4;
      if (operation == SMIME_DECRYPT)
            {

            if (secret_key)
                  {
                  if (!CMS_decrypt_set1_key(cms,
                                    secret_key, secret_keylen,
                                    secret_keyid, secret_keyidlen))
                        {
                        BIO_puts(bio_err,
                              "Error decrypting CMS using secret key\n");
                        goto end;
                        }
                  }

            if (key)
                  {
                  if (!CMS_decrypt_set1_pkey(cms, key, recip))
                        {
                        BIO_puts(bio_err,
                              "Error decrypting CMS using private key\n");
                        goto end;
                        }
                  }

            if (!CMS_decrypt(cms, NULL, NULL, 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);
                  }
            if (rr_print)
                  receipt_request_print(bio_err, cms);
                              
            }
      else if (operation == SMIME_VERIFY_RECEIPT)
            {
            if (CMS_verify_receipt(rcms, cms, other, store, flags) > 0)
                  BIO_printf(bio_err, "Verification successful\n");
            else
                  {
                  BIO_printf(bio_err, "Verification failure\n");
                  goto end;
                  }
            }
      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(out, cms);
            else if (outformat == FORMAT_ASN1) 
                  ret = i2d_CMS_bio(out,cms);
            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);
      if (secret_keyid)
            OPENSSL_free(secret_keyid);
      if (econtent_type)
            ASN1_OBJECT_free(econtent_type);
      if (rr)
            CMS_ReceiptRequest_free(rr);
      if (rr_to)
            sk_free(rr_to);
      if (rr_from)
            sk_free(rr_from);
      X509_STORE_free(store);
      X509_free(cert);
      X509_free(recip);
      X509_free(signer);
      EVP_PKEY_free(key);
      CMS_ContentInfo_free(cms);
      CMS_ContentInfo_free(rcms);
      BIO_free(rctin);
      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 cms_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;

      }

static void gnames_stack_print(BIO *out, STACK_OF(GENERAL_NAMES) *gns)
      {
      STACK_OF(GENERAL_NAME) *gens;
      GENERAL_NAME *gen;
      int i, j;
      for (i = 0; i < sk_GENERAL_NAMES_num(gns); i++)
            {
            gens = sk_GENERAL_NAMES_value(gns, i);
            for (j = 0; j < sk_GENERAL_NAME_num(gens); j++)
                  {
                  gen = sk_GENERAL_NAME_value(gens, j);
                  BIO_puts(out, "    ");
                  GENERAL_NAME_print(out, gen);
                  BIO_puts(out, "\n");
                  }
            }
      return;
      }

static void receipt_request_print(BIO *out, CMS_ContentInfo *cms)
      {
      STACK_OF(CMS_SignerInfo) *sis;
      CMS_SignerInfo *si;
      CMS_ReceiptRequest *rr;
      int allorfirst;
      STACK_OF(GENERAL_NAMES) *rto, *rlist;
      ASN1_STRING *scid;
      int i, rv;
      sis = CMS_get0_SignerInfos(cms);
      for (i = 0; i < sk_CMS_SignerInfo_num(sis); i++)
            {
            si = sk_CMS_SignerInfo_value(sis, i);
            rv = CMS_get1_ReceiptRequest(si, &rr);
            BIO_printf(bio_err, "Signer %d:\n", i + 1);
            if (rv == 0)
                  BIO_puts(bio_err, "  No Receipt Request\n");
            else if (rv < 0)
                  {
                  BIO_puts(bio_err, "  Receipt Request Parse Error\n");
                  ERR_print_errors(bio_err);
                  }
            else
                  {
                  char *id;
                  int idlen;
                  CMS_ReceiptRequest_get0_values(rr, &scid, &allorfirst,
                                          &rlist, &rto);
                  BIO_puts(out, "  Signed Content ID:\n");
                  idlen = ASN1_STRING_length(scid);
                  id = (char *)ASN1_STRING_data(scid);
                  BIO_dump_indent(out, id, idlen, 4);
                  BIO_puts(out, "  Receipts From");
                  if (rlist)
                        {
                        BIO_puts(out, " List:\n");
                        gnames_stack_print(out, rlist);
                        }
                  else if (allorfirst == 1)
                        BIO_puts(out, ": First Tier\n");
                  else if (allorfirst == 0)
                        BIO_puts(out, ": All\n");
                  else
                        BIO_printf(out, " Unknown (%d)\n", allorfirst);
                  BIO_puts(out, "  Receipts To:\n");
                  gnames_stack_print(out, rto);
                  }
            if (rr)
                  CMS_ReceiptRequest_free(rr);
            }
      }

static STACK_OF(GENERAL_NAMES) *make_names_stack(STACK *ns)
      {
      int i;
      STACK_OF(GENERAL_NAMES) *ret;
      GENERAL_NAMES *gens = NULL;
      GENERAL_NAME *gen = NULL;
      ret = sk_GENERAL_NAMES_new_null();
      if (!ret)
            goto err;
      for (i = 0; i < sk_num(ns); i++)
            {
            CONF_VALUE cnf;
            cnf.name = "email";
            cnf.value = sk_value(ns, i);
            gen = v2i_GENERAL_NAME(NULL, NULL, &cnf);
            if (!gen)
                  goto err;
            gens = GENERAL_NAMES_new();
            if (!gens)
                  goto err;
            if (!sk_GENERAL_NAME_push(gens, gen))
                  goto err;
            gen = NULL;
            if (!sk_GENERAL_NAMES_push(ret, gens))
                  goto err;
            gens = NULL;
            }

      return ret;

      err:
      if (ret)
            sk_GENERAL_NAMES_pop_free(ret, GENERAL_NAMES_free);
      if (gens)
            GENERAL_NAMES_free(gens);
      if (gen)
            GENERAL_NAME_free(gen);
      return NULL;
      }


static CMS_ReceiptRequest *make_receipt_request(STACK *rr_to, int rr_allorfirst,
                                                STACK *rr_from)
      {
      STACK_OF(GENERAL_NAMES) *rct_to, *rct_from;
      CMS_ReceiptRequest *rr;
      rct_to = make_names_stack(rr_to);
      if (!rct_to)
            goto err;
      if (rr_from)
            {
            rct_from = make_names_stack(rr_from);
            if (!rct_from)
                  goto err;
            }
      else
            rct_from = NULL;
      rr = CMS_ReceiptRequest_create0(NULL, -1, rr_allorfirst, rct_from,
                                    rct_to);
      return rr;
      err:
      return NULL;
      }

#endif

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