text: /* gpgsm.c - GnuPG for S/MIME
   * Copyright (C) 2001-2008, 2010  Free Software Foundation, Inc.
   * Copyright (C) 2001-2008, 2010  Werner Koch
   *
   * This file is part of GnuPG.
   *
   * GnuPG is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 3 of the License, or
   * (at your option) any later version.
   *
   * GnuPG is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see <https://www.gnu.org/licenses/>.
   */
  
  #include <config.h>
  #include <ctype.h>
  #include <errno.h>
  #include <fcntl.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  /*#include <mcheck.h>*/
  
  #include <assuan.h> /* malloc hooks */
  #include <gcrypt.h>
  #include "gpgsm.h"
  
  #include "../common/asshelp.h"
  #include "../common/compliance.h"
  #include "../common/init.h"
  #include "../common/sysutils.h"
  #include "../kbx/keybox.h" /* malloc hooks */
  #include "keydb.h"
  #include "passphrase.h"
  
  #ifndef O_BINARY
  #define O_BINARY 0
  #endif
  
  enum cmd_and_opt_values {
    aNull = 0,
    oArmor = 'a',
    aDetachedSign = 'b',
    aSym = 'c',
    aDecrypt = 'd',
    aEncr = 'e',
    aListKeys = 'k',
    aListSecretKeys = 'K',
    oDryRun = 'n',
    oOutput = 'o',
    oQuiet = 'q',
    oRecipient = 'r',
    aSign = 's',
    oUser = 'u',
    oVerbose = 'v',
    oBatch = 500,
    aClearsign,
    aKeygen,
    aSignEncr,
    aDeleteKey,
    aImport,
    aVerify,
    aListExternalKeys,
    aListChain,
    aSendKeys,
    aRecvKeys,
    aExport,
    aExportSecretKeyP12,
    aExportSecretKeyP8,
    aExportSecretKeyRaw,
    aServer,
    aLearnCard,
    aCallDirmngr,
    aCallProtectTool,
    aPasswd,
    aDumpKeys,
    aDumpChain,
    aDumpSecretKeys,
    aDumpExternalKeys,
    aSm_KeydbClearSomeCertFlags,
    aFingerprint,
  
    oOptions,
    oDebug,
    oDebugLevel,
    oDebugAll,
    oDebugNone,
    oDebugWait,
    oDebugAllowCoreDump,
    oDebugNoChainValidation,
    oDebugIgnoreExpiration,
    oLogFile,
    oNoLogFile,
    oAuditLog,
    oHtmlAuditLog,
  
    oAgentProgram,
    oLCctype,
    oLCmessages,
  
    oPreferSystemDirmngr,
    oDirmngrProgram,
    oDisableDirmngr,
    oProtectToolProgram,
    oFakedSystemTime,
  
    oPassphraseFD,
  
    oAssumeArmor,
    oAssumeBase64,
    oAssumeBinary,
  
    oBase64,
    oNoArmor,
    oP12Charset,
  
    oCompliance,
  
    oDisableCRLChecks,
    oEnableCRLChecks,
    oDisableTrustedCertCRLCheck,
    oEnableTrustedCertCRLCheck,
    oForceCRLRefresh,
  
    oDisableOCSP,
    oEnableOCSP,
  
    oIncludeCerts,
    oPolicyFile,
    oDisablePolicyChecks,
    oEnablePolicyChecks,
    oAutoIssuerKeyRetrieve,
  
    oWithFingerprint,
    oWithMD5Fingerprint,
    oWithKeygrip,
    oWithSecret,
    oAnswerYes,
    oAnswerNo,
    oKeyring,
    oDefaultKey,
    oDefRecipient,
    oDefRecipientSelf,
    oNoDefRecipient,
    oStatusFD,
    oCipherAlgo,
    oDigestAlgo,
    oExtraDigestAlgo,
    oNoVerbose,
    oNoSecmemWarn,
    oNoDefKeyring,
    oNoGreeting,
    oNoTTY,
    oNoOptions,
    oNoBatch,
    oHomedir,
    oWithColons,
    oWithKeyData,
    oWithValidation,
    oWithEphemeralKeys,
    oSkipVerify,
    oValidationModel,
    oEncryptTo,
    oNoEncryptTo,
    oLoggerFD,
    oDisableCipherAlgo,
    oDisablePubkeyAlgo,
    oIgnoreTimeConflict,
    oNoCommonCertsImport,
    oIgnoreCertExtension
  };
  
  static ARGPARSE_OPTS opts[] = {
  
      ARGPARSE_group(300, N_("@Commands:\n ")),
  
      ARGPARSE_c(aSign, "sign", N_("make a signature")),
      /*ARGPARSE_c (aClearsign, "clearsign", N_("make a clear text signature")
         ),*/
      ARGPARSE_c(aDetachedSign, "detach-sign", N_("make a detached signature")),
      ARGPARSE_c(aEncr, "encrypt", N_("encrypt data")),
      /*ARGPARSE_c (aSym, "symmetric", N_("encryption only with symmetric
         cipher")),*/
      ARGPARSE_c(aDecrypt, "decrypt", N_("decrypt data (default)")),
      ARGPARSE_c(aVerify, "verify", N_("verify a signature")),
      ARGPARSE_c(aListKeys, "list-keys", N_("list keys")),
      ARGPARSE_c(aListExternalKeys, "list-external-keys",
                 N_("list external keys")),
      ARGPARSE_c(aListSecretKeys, "list-secret-keys", N_("list secret keys")),
      ARGPARSE_c(aListChain, "list-chain", N_("list certificate chain")),
      ARGPARSE_c(aFingerprint, "fingerprint", N_("list keys and fingerprints")),
      ARGPARSE_c(aKeygen, "generate-key", N_("generate a new key pair")),
      ARGPARSE_c(aKeygen, "gen-key", "@"),
      ARGPARSE_c(aDeleteKey, "delete-keys",
                 N_("remove keys from the public keyring")),
      ARGPARSE_c(aImport, "import", N_("import certificates")),
      ARGPARSE_c(aExport, "export", N_("export certificates")),
  
      /* We use -raw and not -p1 for pkcs#1 secret key export so that it
         won't accidentally be used in case -p12 was intended.  */
      ARGPARSE_c(aExportSecretKeyP12, "export-secret-key-p12", "@"),
      ARGPARSE_c(aExportSecretKeyP8, "export-secret-key-p8", "@"),
      ARGPARSE_c(aExportSecretKeyRaw, "export-secret-key-raw", "@"),
  
      ARGPARSE_c(aLearnCard, "learn-card", N_("register a smartcard")),
      ARGPARSE_c(aServer, "server", N_("run in server mode")),
      ARGPARSE_c(aCallDirmngr, "call-dirmngr",
                 N_("pass a command to the dirmngr")),
      ARGPARSE_c(aCallProtectTool, "call-protect-tool",
                 N_("invoke gpg-protect-tool")),
      ARGPARSE_c(aPasswd, "change-passphrase", N_("change a passphrase")),
      ARGPARSE_c(aPasswd, "passwd", "@"),
  
      ARGPARSE_c(aDumpKeys, "dump-cert", "@"),
      ARGPARSE_c(aDumpKeys, "dump-keys", "@"),
      ARGPARSE_c(aDumpChain, "dump-chain", "@"),
      ARGPARSE_c(aDumpExternalKeys, "dump-external-keys", "@"),
      ARGPARSE_c(aDumpSecretKeys, "dump-secret-keys", "@"),
      ARGPARSE_c(aSm_KeydbClearSomeCertFlags, "sm_keydb-clear-some-cert-flags",
                 "@"),
  
      ARGPARSE_group(301, N_("@\nOptions:\n ")),
  
      ARGPARSE_s_n(oArmor, "armor", N_("create ascii armored output")),
      ARGPARSE_s_n(oArmor, "armour", "@"),
      ARGPARSE_s_n(oBase64, "base64", N_("create base-64 encoded output")),
  
      ARGPARSE_s_s(oP12Charset, "p12-charset", "@"),
  
      ARGPARSE_s_i(oPassphraseFD, "passphrase-fd", "@"),
  
      ARGPARSE_s_n(oAssumeArmor, "assume-armor",
                   N_("assume input is in PEM format")),
      ARGPARSE_s_n(oAssumeBase64, "assume-base64",
                   N_("assume input is in base-64 format")),
      ARGPARSE_s_n(oAssumeBinary, "assume-binary",
                   N_("assume input is in binary format")),
  
      ARGPARSE_s_s(oRecipient, "recipient", N_("|USER-ID|encrypt for USER-ID")),
  
      ARGPARSE_s_n(oPreferSystemDirmngr, "prefer-system-dirmngr", "@"),
  
      ARGPARSE_s_n(oDisableCRLChecks, "disable-crl-checks",
                   N_("never consult a CRL")),
      ARGPARSE_s_n(oEnableCRLChecks, "enable-crl-checks", "@"),
      ARGPARSE_s_n(oDisableTrustedCertCRLCheck, "disable-trusted-cert-crl-check",
                   "@"),
      ARGPARSE_s_n(oEnableTrustedCertCRLCheck, "enable-trusted-cert-crl-check",
                   "@"),
  
      ARGPARSE_s_n(oForceCRLRefresh, "force-crl-refresh", "@"),
  
      ARGPARSE_s_n(oDisableOCSP, "disable-ocsp", "@"),
      ARGPARSE_s_n(oEnableOCSP, "enable-ocsp", N_("check validity using OCSP")),
  
      ARGPARSE_s_s(oValidationModel, "validation-model", "@"),
  
      ARGPARSE_s_i(oIncludeCerts, "include-certs",
                   N_("|N|number of certificates to include")),
  
      ARGPARSE_s_s(oPolicyFile, "policy-file",
                   N_("|FILE|take policy information from FILE")),
  
      ARGPARSE_s_n(oDisablePolicyChecks, "disable-policy-checks",
                   N_("do not check certificate policies")),
      ARGPARSE_s_n(oEnablePolicyChecks, "enable-policy-checks", "@"),
  
      ARGPARSE_s_n(oAutoIssuerKeyRetrieve, "auto-issuer-key-retrieve",
                   N_("fetch missing issuer certificates")),
  
      ARGPARSE_s_s(oEncryptTo, "encrypt-to", "@"),
      ARGPARSE_s_n(oNoEncryptTo, "no-encrypt-to", "@"),
  
      ARGPARSE_s_s(oUser, "local-user",
                   N_("|USER-ID|use USER-ID to sign or decrypt")),
  
      ARGPARSE_s_s(oOutput, "output", N_("|FILE|write output to FILE")),
      ARGPARSE_s_n(oVerbose, "verbose", N_("verbose")),
      ARGPARSE_s_n(oQuiet, "quiet", N_("be somewhat more quiet")),
      ARGPARSE_s_n(oNoTTY, "no-tty", N_("don't use the terminal at all")),
      ARGPARSE_s_s(oLogFile, "log-file",
                   N_("|FILE|write a server mode log to FILE")),
      ARGPARSE_s_n(oNoLogFile, "no-log-file", "@"),
      ARGPARSE_s_i(oLoggerFD, "logger-fd", "@"),
  
      ARGPARSE_s_n(oDryRun, "dry-run", N_("do not make any changes")),
      ARGPARSE_s_n(oBatch, "batch", N_("batch mode: never ask")),
      ARGPARSE_s_n(oAnswerYes, "yes", N_("assume yes on most questions")),
      ARGPARSE_s_n(oAnswerNo, "no", N_("assume no on most questions")),
  
      ARGPARSE_s_s(oKeyring, "keyring",
                   N_("|FILE|add keyring to the list of keyrings")),
  
      ARGPARSE_s_s(oDefaultKey, "default-key",
                   N_("|USER-ID|use USER-ID as default secret key")),
  
      /* Not yet used: */
      /*   ARGPARSE_s_s (oDefRecipient, "default-recipient", */
      /*                  N_("|NAME|use NAME as default recipient")), */
      /*   ARGPARSE_s_n (oDefRecipientSelf, "default-recipient-self", */
      /*                  N_("use the default key as default recipient")), */
      /*   ARGPARSE_s_n (oNoDefRecipient, "no-default-recipient", "@"), */
  
      ARGPARSE_s_s(oOptions, "options", N_("|FILE|read options from FILE")),
  
      ARGPARSE_s_s(oDebug, "debug", "@"),
      ARGPARSE_s_s(oDebugLevel, "debug-level",
                   N_("|LEVEL|set the debugging level to LEVEL")),
      ARGPARSE_s_n(oDebugAll, "debug-all", "@"),
      ARGPARSE_s_n(oDebugNone, "debug-none", "@"),
      ARGPARSE_s_i(oDebugWait, "debug-wait", "@"),
      ARGPARSE_s_n(oDebugAllowCoreDump, "debug-allow-core-dump", "@"),
      ARGPARSE_s_n(oDebugNoChainValidation, "debug-no-chain-validation", "@"),
      ARGPARSE_s_n(oDebugIgnoreExpiration, "debug-ignore-expiration", "@"),
  
      ARGPARSE_s_i(oStatusFD, "status-fd",
                   N_("|FD|write status info to this FD")),
  
      ARGPARSE_s_s(oCipherAlgo, "cipher-algo",
                   N_("|NAME|use cipher algorithm NAME")),
      ARGPARSE_s_s(oDigestAlgo, "digest-algo",
                   N_("|NAME|use message digest algorithm NAME")),
      ARGPARSE_s_s(oExtraDigestAlgo, "extra-digest-algo", "@"),
  
      ARGPARSE_group(302, N_("@\n(See the man page for a complete listing of all "
                             "commands and options)\n")),
  
      /* Hidden options. */
      ARGPARSE_s_s(oCompliance, "compliance", "@"),
      ARGPARSE_s_n(oNoVerbose, "no-verbose", "@"),
      ARGPARSE_s_n(oNoSecmemWarn, "no-secmem-warning", "@"),
      ARGPARSE_s_n(oNoArmor, "no-armor", "@"),
      ARGPARSE_s_n(oNoArmor, "no-armour", "@"),
      ARGPARSE_s_n(oNoDefKeyring, "no-default-keyring", "@"),
      ARGPARSE_s_n(oNoGreeting, "no-greeting", "@"),
      ARGPARSE_s_n(oNoOptions, "no-options", "@"),
      ARGPARSE_s_s(oHomedir, "homedir", "@"),
      ARGPARSE_s_s(oAgentProgram, "agent-program", "@"),
      ARGPARSE_s_s(oLCctype, "lc-ctype", "@"),
      ARGPARSE_s_s(oLCmessages, "lc-messages", "@"),
      ARGPARSE_s_s(oDirmngrProgram, "dirmngr-program", "@"),
      ARGPARSE_s_n(oDisableDirmngr, "disable-dirmngr", "@"),
      ARGPARSE_s_s(oProtectToolProgram, "protect-tool-program", "@"),
      ARGPARSE_s_s(oFakedSystemTime, "faked-system-time", "@"),
      ARGPARSE_s_n(oNoBatch, "no-batch", "@"),
      ARGPARSE_s_n(oWithColons, "with-colons", "@"),
      ARGPARSE_s_n(oWithKeyData, "with-key-data", "@"),
      ARGPARSE_s_n(oWithValidation, "with-validation", "@"),
      ARGPARSE_s_n(oWithMD5Fingerprint, "with-md5-fingerprint", "@"),
      ARGPARSE_s_n(oWithEphemeralKeys, "with-ephemeral-keys", "@"),
      ARGPARSE_s_n(oSkipVerify, "skip-verify", "@"),
      ARGPARSE_s_n(oWithFingerprint, "with-fingerprint", "@"),
      ARGPARSE_s_n(oWithKeygrip, "with-keygrip", "@"),
      ARGPARSE_s_n(oWithSecret, "with-secret", "@"),
      ARGPARSE_s_s(oDisableCipherAlgo, "disable-cipher-algo", "@"),
      ARGPARSE_s_s(oDisablePubkeyAlgo, "disable-pubkey-algo", "@"),
      ARGPARSE_s_n(oIgnoreTimeConflict, "ignore-time-conflict", "@"),
      ARGPARSE_s_n(oNoCommonCertsImport, "no-common-certs-import", "@"),
      ARGPARSE_s_s(oIgnoreCertExtension, "ignore-cert-extension", "@"),
  
      /* Command aliases.  */
      ARGPARSE_c(aListKeys, "list-key", "@"),
      ARGPARSE_c(aListChain, "list-signatures", "@"),
      ARGPARSE_c(aListChain, "list-sigs", "@"),
      ARGPARSE_c(aListChain, "check-signatures", "@"),
      ARGPARSE_c(aListChain, "check-sigs", "@"),
      ARGPARSE_c(aDeleteKey, "delete-key", "@"),
  
      ARGPARSE_end()};
  
  /* The list of supported debug flags.  */
  static struct debug_flags_s debug_flags[] = {{DBG_X509_VALUE, "x509"},
                                               {DBG_MPI_VALUE, "mpi"},
                                               {DBG_CRYPTO_VALUE, "crypto"},
                                               {DBG_MEMORY_VALUE, "memory"},
                                               {DBG_CACHE_VALUE, "cache"},
                                               {DBG_MEMSTAT_VALUE, "memstat"},
                                               {DBG_HASHING_VALUE, "hashing"},
                                               {DBG_IPC_VALUE, "ipc"},
                                               {0, NULL}};
  
  /* Global variable to keep an error count. */
  int gpgsm_errors_seen = 0;
  
  /* Helper to implement --debug-level and --debug*/
  static const char *debug_level;
  static unsigned int debug_value;
  
  /* Default value for include-certs.
  
     It is often cumbersome to locate intermediate certificates, thus by
     default we include all certificates in the chain.  However we leave
     out the root certificate because that would make it too easy for
     the recipient to import that root certificate.  A root certificate
     should be installed only after due checks and thus it won't help to
     send it along with each message.  */
  #define DEFAULT_INCLUDE_CERTS -2 /* Include all certs but root. */
  static int default_include_certs = DEFAULT_INCLUDE_CERTS;
  
  /* Whether the chain mode shall be used for validation.  */
  static int default_validation_model;
  
  /* The default cipher algo.  */
  #define DEFAULT_CIPHER_ALGO "AES"
  
  static char *build_list(const char *text, const char *(*mapf)(int),
                          int (*chkf)(int));
  static void set_cmd(enum cmd_and_opt_values *ret_cmd,
                      enum cmd_and_opt_values new_cmd);
  
  static int open_read(const char *filename);
  static estream_t open_es_fread(const char *filename, const char *mode);
  static estream_t open_es_fwrite(const char *filename);
  static void run_protect_tool(int argc, char **argv);
  
  static int our_pk_test_algo(int algo) {
    switch (algo) {
      case GCRY_PK_RSA:
      case GCRY_PK_ECDSA:
        return gcry_pk_test_algo(algo);
      default:
        return 1;
    }
  }
  
  static int our_cipher_test_algo(int algo) {
    switch (algo) {
      case GCRY_CIPHER_3DES:
      case GCRY_CIPHER_AES128:
      case GCRY_CIPHER_AES192:
      case GCRY_CIPHER_AES256:
      case GCRY_CIPHER_SERPENT128:
      case GCRY_CIPHER_SERPENT192:
      case GCRY_CIPHER_SERPENT256:
      case GCRY_CIPHER_CAMELLIA128:
      case GCRY_CIPHER_CAMELLIA192:
      case GCRY_CIPHER_CAMELLIA256:
        return gcry_cipher_test_algo(algo);
      default:
        return 1;
    }
  }
  
  static int our_md_test_algo(int algo) {
    switch (algo) {
      case GCRY_MD_MD5:
      case GCRY_MD_SHA1:
      case GCRY_MD_RMD160:
      case GCRY_MD_SHA224:
      case GCRY_MD_SHA256:
      case GCRY_MD_SHA384:
      case GCRY_MD_SHA512:
      case GCRY_MD_WHIRLPOOL:
        return gcry_md_test_algo(algo);
      default:
        return 1;
    }
  }
  
  static char *make_libversion(const char *libname,
                               const char *(*getfnc)(const char *)) {
    const char *s;
    char *result;
  
    s = getfnc(NULL);
    result = (char *)xmalloc(strlen(libname) + 1 + strlen(s) + 1);
    strcpy(stpcpy(stpcpy(result, libname), " "), s);
    return result;
  }
  
  static const char *my_strusage(int level) {
    static char *digests, *pubkeys, *ciphers;
    static char *ver_gcry, *ver_ksba;
    const char *p = NULL;
  
    switch (level) {
      case 11:
        p = "@GPGSM@ (@GNUPG@)";
        break;
      case 13:
        p = VERSION;
        break;
      case 19:
        p = _("Please report bugs to <@EMAIL@>.\n");
        break;
  
      case 1:
      case 40:
        p = _("Usage: @GPGSM@ [options] [files] (-h for help)");
        break;
      case 41:
        p =
            _("Syntax: @GPGSM@ [options] [files]\n"
              "Sign, check, encrypt or decrypt using the S/MIME protocol\n"
              "Default operation depends on the input data\n");
        break;
  
      case 31:
        p = "\nHome: ";
        break;
      case 32:
        p = gnupg_homedir();
        break;
      case 33:
        p = _("\nSupported algorithms:\n");
        break;
      case 34:
        if (!ciphers)
          ciphers = build_list("Cipher: ", gnupg_cipher_algo_name,
                               our_cipher_test_algo);
        p = ciphers;
        break;
      case 35:
        if (!pubkeys)
          pubkeys = build_list("Pubkey: ", gcry_pk_algo_name, our_pk_test_algo);
        p = pubkeys;
        break;
      case 36:
        if (!digests)
          digests = build_list("Hash: ", gcry_md_algo_name, our_md_test_algo);
        p = digests;
        break;
  
      default:
        p = NULL;
        break;
    }
    return p;
  }
  
  static char *build_list(const char *text, const char *(*mapf)(int),
                          int (*chkf)(int)) {
    int i;
    size_t n = strlen(text) + 2;
    char *list, *p;
  
    for (i = 1; i < 400; i++)
      if (!chkf(i)) n += strlen(mapf(i)) + 2;
    list = (char *)xmalloc(21 + n);
    *list = 0;
    for (p = NULL, i = 1; i < 400; i++) {
      if (!chkf(i)) {
        if (!p)
          p = stpcpy(list, text);
        else
          p = stpcpy(p, ", ");
        p = stpcpy(p, mapf(i));
      }
    }
    if (p) strcpy(p, "\n");
    return list;
  }
  
  /* Set the file pointer into binary mode if required.  */
  static void set_binary(FILE *fp) {
  #ifdef HAVE_DOSISH_SYSTEM
    setmode(fileno(fp), O_BINARY);
  #else
    (void)fp;
  #endif
  }
  
  static void wrong_args(const char *text) {
    fprintf(stderr, _("usage: %s [options] %s\n"), GPGSM_NAME, text);
    gpgsm_exit(2);
  }
  
  /* Setup the debugging.  With a DEBUG_LEVEL of NULL only the active
     debug flags are propagated to the subsystems.  With DEBUG_LEVEL
     set, a specific set of debug flags is set; and individual debugging
     flags will be added on top.  */
  static void set_debug(void) {
    int numok = (debug_level && digitp(debug_level));
    int numlvl = numok ? atoi(debug_level) : 0;
  
    if (!debug_level)
      ;
    else if (!strcmp(debug_level, "none") || (numok && numlvl < 1))
      opt.debug = 0;
    else if (!strcmp(debug_level, "basic") || (numok && numlvl <= 2))
      opt.debug = DBG_IPC_VALUE;
    else if (!strcmp(debug_level, "advanced") || (numok && numlvl <= 5))
      opt.debug = DBG_IPC_VALUE | DBG_X509_VALUE;
    else if (!strcmp(debug_level, "expert") || (numok && numlvl <= 8))
      opt.debug =
          (DBG_IPC_VALUE | DBG_X509_VALUE | DBG_CACHE_VALUE | DBG_CRYPTO_VALUE);
    else if (!strcmp(debug_level, "guru") || numok) {
      opt.debug = ~0;
      /* Unless the "guru" string has been used we don't want to allow
         hashing debugging.  The rationale is that people tend to
         select the highest debug value and would then clutter their
         disk with debug files which may reveal confidential data.  */
      if (numok) opt.debug &= ~(DBG_HASHING_VALUE);
    } else {
      log_error(_("invalid debug-level '%s' given\n"), debug_level);
      gpgsm_exit(2);
    }
  
    opt.debug |= debug_value;
  
    if (opt.debug && !opt.verbose) opt.verbose = 1;
    if (opt.debug) opt.quiet = 0;
  
    if (opt.debug & DBG_MPI_VALUE) gcry_control(GCRYCTL_SET_DEBUG_FLAGS, 2);
    if (opt.debug & DBG_CRYPTO_VALUE) gcry_control(GCRYCTL_SET_DEBUG_FLAGS, 1);
    gcry_control(GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
  
    if (opt.debug) parse_debug_flag(NULL, &opt.debug, debug_flags);
  }
  
  static void set_cmd(enum cmd_and_opt_values *ret_cmd,
                      enum cmd_and_opt_values new_cmd) {
    enum cmd_and_opt_values cmd = *ret_cmd;
  
    if (!cmd || cmd == new_cmd)
      cmd = new_cmd;
    else if (cmd == aSign && new_cmd == aEncr)
      cmd = aSignEncr;
    else if (cmd == aEncr && new_cmd == aSign)
      cmd = aSignEncr;
    else if ((cmd == aSign && new_cmd == aClearsign) ||
             (cmd == aClearsign && new_cmd == aSign))
      cmd = aClearsign;
    else {
      log_error(_("conflicting commands\n"));
      gpgsm_exit(2);
    }
  
    *ret_cmd = cmd;
  }
  
  /* Helper to add recipients to a list. */
  static void do_add_recipient(ctrl_t ctrl, const char *name,
                               certlist_t *recplist, int is_encrypt_to,
                               int recp_required) {
    int rc = gpgsm_add_to_certlist(ctrl, name, 0, recplist, is_encrypt_to);
    if (rc) {
      if (recp_required) {
        log_error("can't encrypt to '%s': %s\n", name, gpg_strerror(rc));
        gpgsm_status2(ctrl, STATUS_INV_RECP, get_inv_recpsgnr_code(rc), name,
                      NULL);
      } else
        log_info(_("Note: won't be able to encrypt to '%s': %s\n"), name,
                 gpg_strerror(rc));
    }
  }
  
  static void parse_validation_model(const char *model) {
    int i = gpgsm_parse_validation_model(model);
    if (i == -1)
      log_error(_("unknown validation model '%s'\n"), model);
    else
      default_validation_model = i;
  }
  
  int gpgsm_main(int argc, char **argv) {
    ARGPARSE_ARGS pargs;
    int orig_argc;
    char **orig_argv;
    /*  char *username;*/
    int may_coredump;
    strlist_t sl, remusr = NULL, locusr = NULL;
    strlist_t nrings = NULL;
    int detached_sig = 0;
    FILE *configfp = NULL;
    char *configname = NULL;
    unsigned configlineno;
    int parse_debug = 0;
    int no_more_options = 0;
    int default_config = 1;
    int default_keyring = 1;
    char *logfile = NULL;
    int greeting = 0;
    int nogreeting = 0;
    int debug_wait = 0;
    int no_common_certs_import = 0;
    int with_fpr = 0;
    const char *forced_digest_algo = NULL;
    const char *extra_digest_algo = NULL;
    enum cmd_and_opt_values cmd = (cmd_and_opt_values)0;
    struct server_control_s ctrl;
    certlist_t recplist = NULL;
    certlist_t signerlist = NULL;
    int do_not_setup_keys = 0;
    int recp_required = 0;
    struct assuan_malloc_hooks malloc_hooks;
    int pwfd = -1;
    /*mtrace();*/
  
    early_system_init();
    gnupg_reopen_std(GPGSM_NAME);
    gnupg_rl_initialize();
    set_strusage(my_strusage);
    gcry_control(GCRYCTL_SUSPEND_SECMEM_WARN);
  
    /* Please note that we may running SUID(ROOT), so be very CAREFUL
       when adding any stuff between here and the call to secmem_init()
       somewhere after the option parsing */
    log_set_prefix(GPGSM_NAME, GPGRT_LOG_WITH_PREFIX);
  
    /* Make sure that our subsystems are ready.  */
    init_common_subsystems(&argc, &argv);
  
    gcry_control(GCRYCTL_USE_SECURE_RNDPOOL);
  
    may_coredump = disable_core_dumps();
  
    dotlock_create(NULL, 0); /* Register lockfile cleanup.  */
  
    /* Tell the compliance module who we are.  */
    gnupg_initialize_compliance(GNUPG_MODULE_NAME_GPGSM);
  
    opt.def_cipher_algoid = DEFAULT_CIPHER_ALGO;
  
    /* First check whether we have a config file on the commandline */
    orig_argc = argc;
    orig_argv = argv;
    pargs.argc = &argc;
    pargs.argv = &argv;
    pargs.flags = 1 | (1 << 6); /* do not remove the args, ignore version */
    while (arg_parse(&pargs, opts)) {
      if (pargs.r_opt == oDebug || pargs.r_opt == oDebugAll)
        parse_debug++;
      else if (pargs.r_opt == oOptions) { /* yes there is one, so we do not try
                                             the default one but
                                             read the config file when it is
                                             encountered at the
                                             commandline */
        default_config = 0;
      } else if (pargs.r_opt == oNoOptions) {
        default_config = 0; /* --no-options */
        opt.no_homedir_creation = 1;
      } else if (pargs.r_opt == oHomedir)
        gnupg_set_homedir(pargs.r.ret_str);
      else if (pargs.r_opt == aCallProtectTool)
        break; /* This break makes sure that --version and --help are
                  passed to the protect-tool. */
    }
  
    /* Initialize the secure memory. */
    gcry_control(GCRYCTL_INIT_SECMEM, 16384, 0);
  
    /*
       Now we are now working under our real uid
    */
  
    ksba_set_malloc_hooks(gcry_malloc, gcry_realloc, gcry_free);
  
    malloc_hooks.malloc = gcry_malloc;
    malloc_hooks.realloc = gcry_realloc;
    malloc_hooks.free = gcry_free;
    assuan_set_malloc_hooks(&malloc_hooks);
    setup_libassuan_logging(&opt.debug, NULL);
  
    keybox_set_malloc_hooks(gcry_malloc, gcry_realloc, gcry_free);
  
    /* Setup a default control structure for command line mode */
    memset(&ctrl, 0, sizeof ctrl);
    gpgsm_init_default_ctrl(&ctrl);
    ctrl.no_server = 1;
    ctrl.status_fd = -1; /* No status output. */
    ctrl.autodetect_encoding = 1;
  
    /* Set the default option file */
    if (default_config)
      configname =
          make_filename(gnupg_homedir(), GPGSM_NAME EXTSEP_S "conf", NULL);
    /* Set the default policy file */
    opt.policy_file = make_filename(gnupg_homedir(), "policies.txt", NULL);
  
    argc = orig_argc;
    argv = orig_argv;
    pargs.argc = &argc;
    pargs.argv = &argv;
    pargs.flags = 1; /* do not remove the args */
  
  next_pass:
    if (configname) {
      configlineno = 0;
      configfp = fopen(configname, "r");
      if (!configfp) {
        if (default_config) {
          if (parse_debug)
            log_info(_("Note: no default option file '%s'\n"), configname);
        } else {
          log_error(_("option file '%s': %s\n"), configname, strerror(errno));
          gpgsm_exit(2);
        }
        xfree(configname);
        configname = NULL;
      }
      if (parse_debug && configname)
        log_info(_("reading options from '%s'\n"), configname);
      default_config = 0;
    }
  
    while (!no_more_options &&
           optfile_parse(configfp, configname, &configlineno, &pargs, opts)) {
      switch (pargs.r_opt) {
        case aServer:
          opt.batch = 1;
          set_cmd(&cmd, aServer);
          break;
  
        case aCallDirmngr:
          opt.batch = 1;
          set_cmd(&cmd, aCallDirmngr);
          do_not_setup_keys = 1;
          break;
  
        case aCallProtectTool:
          opt.batch = 1;
          set_cmd(&cmd, aCallProtectTool);
          no_more_options = 1; /* Stop parsing. */
          do_not_setup_keys = 1;
          break;
  
        case aDeleteKey:
          set_cmd(&cmd, aDeleteKey);
          /*greeting=1;*/
          do_not_setup_keys = 1;
          break;
  
        case aDetachedSign:
          detached_sig = 1;
          set_cmd(&cmd, aSign);
          break;
  
        case aKeygen:
          set_cmd(&cmd, aKeygen);
          greeting = 1;
          do_not_setup_keys = 1;
          break;
  
        case aImport:
        case aSendKeys:
        case aRecvKeys:
        case aExport:
        case aExportSecretKeyP12:
        case aExportSecretKeyP8:
        case aExportSecretKeyRaw:
        case aDumpKeys:
        case aDumpChain:
        case aDumpExternalKeys:
        case aDumpSecretKeys:
        case aListKeys:
        case aListExternalKeys:
        case aListSecretKeys:
        case aListChain:
        case aLearnCard:
        case aPasswd:
        case aSm_KeydbClearSomeCertFlags:
          do_not_setup_keys = 1;
          set_cmd(&cmd, (cmd_and_opt_values)(pargs.r_opt));
          break;
  
        case aEncr:
          recp_required = 1;
          set_cmd(&cmd, (cmd_and_opt_values)(pargs.r_opt));
          break;
  
        case aSym:
        case aDecrypt:
        case aSign:
        case aClearsign:
        case aVerify:
          set_cmd(&cmd, (cmd_and_opt_values)(pargs.r_opt));
          break;
  
        /* Output encoding selection.  */
        case oArmor:
          ctrl.create_pem = 1;
          break;
        case oBase64:
          ctrl.create_pem = 0;
          ctrl.create_base64 = 1;
          break;
        case oNoArmor:
          ctrl.create_pem = 0;
          ctrl.create_base64 = 0;
          break;
  
        case oP12Charset:
          opt.p12_charset = pargs.r.ret_str;
          break;
  
        case oPassphraseFD:
          pwfd = translate_sys2libc_fd_int(pargs.r.ret_int, 0);
          break;
  
        /* Input encoding selection.  */
        case oAssumeArmor:
          ctrl.autodetect_encoding = 0;
          ctrl.is_pem = 1;
          ctrl.is_base64 = 0;
          break;
        case oAssumeBase64:
          ctrl.autodetect_encoding = 0;
          ctrl.is_pem = 0;
          ctrl.is_base64 = 1;
          break;
        case oAssumeBinary:
          ctrl.autodetect_encoding = 0;
          ctrl.is_pem = 0;
          ctrl.is_base64 = 0;
          break;
  
        case oDisableCRLChecks:
          opt.no_crl_check = 1;
          break;
        case oEnableCRLChecks:
          opt.no_crl_check = 0;
          break;
        case oDisableTrustedCertCRLCheck:
          opt.no_trusted_cert_crl_check = 1;
          break;
        case oEnableTrustedCertCRLCheck:
          opt.no_trusted_cert_crl_check = 0;
          break;
        case oForceCRLRefresh:
          opt.force_crl_refresh = 1;
          break;
  
        case oDisableOCSP:
          ctrl.use_ocsp = opt.enable_ocsp = 0;
          break;
        case oEnableOCSP:
          ctrl.use_ocsp = opt.enable_ocsp = 1;
          break;
  
        case oIncludeCerts:
          ctrl.include_certs = default_include_certs = pargs.r.ret_int;
          break;
  
        case oPolicyFile:
          xfree(opt.policy_file);
          if (*pargs.r.ret_str)
            opt.policy_file = xstrdup(pargs.r.ret_str);
          else
            opt.policy_file = NULL;
          break;
  
        case oDisablePolicyChecks:
          opt.no_policy_check = 1;
          break;
        case oEnablePolicyChecks:
          opt.no_policy_check = 0;
          break;
  
        case oAutoIssuerKeyRetrieve:
          opt.auto_issuer_key_retrieve = 1;
          break;
  
        case oOutput:
          opt.outfile = pargs.r.ret_str;
          break;
  
        case oQuiet:
          opt.quiet = 1;
          break;
        case oNoTTY: /* fixme:tty_no_terminal(1);*/
          break;
        case oDryRun:
          opt.dry_run = 1;
          break;
  
        case oVerbose:
          opt.verbose++;
          gcry_control(GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
          break;
        case oNoVerbose:
          opt.verbose = 0;
          gcry_control(GCRYCTL_SET_VERBOSITY, (int)opt.verbose);
          break;
  
        case oLogFile:
          logfile = pargs.r.ret_str;
          break;
        case oNoLogFile:
          logfile = NULL;
          break;
  
        case oBatch:
          opt.batch = 1;
          greeting = 0;
          break;
        case oNoBatch:
          opt.batch = 0;
          break;
  
        case oAnswerYes:
          opt.answer_yes = 1;
          break;
        case oAnswerNo:
          opt.answer_no = 1;
          break;
  
        case oKeyring:
          append_to_strlist(&nrings, pargs.r.ret_str);
          break;
  
        case oDebug:
          if (parse_debug_flag(pargs.r.ret_str, &debug_value, debug_flags)) {
            pargs.r_opt = ARGPARSE_INVALID_ARG;
            pargs.err = ARGPARSE_PRINT_ERROR;
          }
          break;
        case oDebugAll:
          debug_value = ~0;
          break;
        case oDebugNone:
          debug_value = 0;
          break;
        case oDebugLevel:
          debug_level = pargs.r.ret_str;
          break;
        case oDebugWait:
          debug_wait = pargs.r.ret_int;
          break;
        case oDebugAllowCoreDump:
          may_coredump = enable_core_dumps();
          break;
        case oDebugNoChainValidation:
          opt.no_chain_validation = 1;
          break;
        case oDebugIgnoreExpiration:
          opt.ignore_expiration = 1;
          break;
  
        case oStatusFD:
          ctrl.status_fd = pargs.r.ret_int;
          break;
        case oLoggerFD:
          log_set_fd(pargs.r.ret_int);
          break;
        case oWithMD5Fingerprint:
          opt.with_md5_fingerprint = 1; /*fall through*/
        case oWithFingerprint:
          with_fpr = 1; /*fall through*/
        case aFingerprint:
          opt.fingerprint++;
          break;
  
        case oWithKeygrip:
          opt.with_keygrip = 1;
          break;
  
        case oOptions:
          /* config files may not be nested (silently ignore them) */
          if (!configfp) {
            xfree(configname);
            configname = xstrdup(pargs.r.ret_str);
            goto next_pass;
          }
          break;
        case oNoOptions:
          opt.no_homedir_creation = 1;
          break; /* no-options */
        case oHomedir:
          gnupg_set_homedir(pargs.r.ret_str);
          break;
        case oAgentProgram:
          opt.agent_program = pargs.r.ret_str;
          break;
  
        case oLCctype:
          opt.lc_ctype = xstrdup(pargs.r.ret_str);
          break;
        case oLCmessages:
          opt.lc_messages = xstrdup(pargs.r.ret_str);
          break;
  
        case oDirmngrProgram:
          opt.dirmngr_program = pargs.r.ret_str;
          break;
        case oDisableDirmngr:
          opt.disable_dirmngr = 1;
          break;
        case oPreferSystemDirmngr: /* Obsolete */;
          break;
        case oProtectToolProgram:
          opt.protect_tool_program = pargs.r.ret_str;
          break;
  
        case oFakedSystemTime: {
          time_t faked_time = isotime2epoch(pargs.r.ret_str);
          if (faked_time == (time_t)(-1))
            faked_time = (time_t)strtoul(pargs.r.ret_str, NULL, 10);
          gnupg_set_time(faked_time, 0);
        } break;
  
        case oNoDefKeyring:
          default_keyring = 0;
          break;
        case oNoGreeting:
          nogreeting = 1;
          break;
  
        case oDefaultKey:
          if (*pargs.r.ret_str) {
            xfree(opt.local_user);
            opt.local_user = xstrdup(pargs.r.ret_str);
          }
          break;
        case oDefRecipient:
          if (*pargs.r.ret_str) opt.def_recipient = xstrdup(pargs.r.ret_str);
          break;
        case oDefRecipientSelf:
          xfree(opt.def_recipient);
          opt.def_recipient = NULL;
          opt.def_recipient_self = 1;
          break;
        case oNoDefRecipient:
          xfree(opt.def_recipient);
          opt.def_recipient = NULL;
          opt.def_recipient_self = 0;
          break;
  
        case oWithKeyData:
          opt.with_key_data = 1; /* fall through */
        case oWithColons:
          ctrl.with_colons = 1;
          break;
        case oWithSecret:
          ctrl.with_secret = 1;
          break;
        case oWithValidation:
          ctrl.with_validation = 1;
          break;
        case oWithEphemeralKeys:
          ctrl.with_ephemeral_keys = 1;
          break;
  
        case oSkipVerify:
          opt.skip_verify = 1;
          break;
  
        case oNoEncryptTo:
          opt.no_encrypt_to = 1;
          break;
        case oEncryptTo: /* Store the recipient in the second list */
          sl = add_to_strlist(&remusr, pargs.r.ret_str);
          sl->flags = 1;
          break;
  
        case oRecipient: /* store the recipient */
          add_to_strlist(&remusr, pargs.r.ret_str);
          break;
  
        case oUser: /* Store the local users, the first one is the default */
          if (!opt.local_user) opt.local_user = xstrdup(pargs.r.ret_str);
          add_to_strlist(&locusr, pargs.r.ret_str);
          break;
  
        case oNoSecmemWarn:
          gcry_control(GCRYCTL_DISABLE_SECMEM_WARN);
          break;
  
        case oCipherAlgo:
          opt.def_cipher_algoid = pargs.r.ret_str;
          break;
  
        case oDisableCipherAlgo: {
          int algo = gcry_cipher_map_name(pargs.r.ret_str);
          gcry_cipher_ctl(NULL, GCRYCTL_DISABLE_ALGO, &algo, sizeof algo);
        } break;
        case oDisablePubkeyAlgo: {
          int algo = gcry_pk_map_name(pargs.r.ret_str);
          gcry_pk_ctl(GCRYCTL_DISABLE_ALGO, &algo, sizeof algo);
        } break;
  
        case oDigestAlgo:
          forced_digest_algo = pargs.r.ret_str;
          break;
  
        case oExtraDigestAlgo:
          extra_digest_algo = pargs.r.ret_str;
          break;
  
        case oIgnoreTimeConflict:
          opt.ignore_time_conflict = 1;
          break;
        case oNoCommonCertsImport:
          no_common_certs_import = 1;
          break;
  
        case oValidationModel:
          parse_validation_model(pargs.r.ret_str);
          break;
  
        case oIgnoreCertExtension:
          add_to_strlist(&opt.ignored_cert_extensions, pargs.r.ret_str);
          break;
  
        case oCompliance: {
          struct gnupg_compliance_option compliance_options[] = {
              {"de-vs", CO_DE_VS}};
          int compliance =
              gnupg_parse_compliance_option(pargs.r.ret_str, compliance_options,
                                            DIM(compliance_options), opt.quiet);
          if (compliance < 0) gpgsm_exit(1);
          opt.compliance = (gnupg_compliance_mode)compliance;
        } break;
  
        default:
          pargs.err = configfp ? ARGPARSE_PRINT_WARNING : ARGPARSE_PRINT_ERROR;
          break;
      }
    }
  
    if (configfp) {
      fclose(configfp);
      configfp = NULL;
      /* Keep a copy of the config filename. */
      opt.config_filename = configname;
      configname = NULL;
      goto next_pass;
    }
    xfree(configname);
    configname = NULL;
  
    if (!opt.config_filename)
      opt.config_filename =
          make_filename(gnupg_homedir(), GPGSM_NAME EXTSEP_S "conf", NULL);
  
    if (log_get_errorcount(0)) gpgsm_exit(2);
  
    if (pwfd != -1) /* Read the passphrase now.  */
      sm_read_passphrase_from_fd(pwfd);
  
    /* Now that we have the options parsed we need to update the default
       control structure.  */
    gpgsm_init_default_ctrl(&ctrl);
  
    if (nogreeting) greeting = 0;
  
    if (greeting) {
      es_fprintf(es_stderr, "%s %s; %s\n", strusage(11), strusage(13),
                 strusage(14));
      es_fprintf(es_stderr, "%s\n", strusage(15));
    }
  
    if (may_coredump && !opt.quiet)
      log_info(_("WARNING: program may create a core file!\n"));
  
    if (logfile && cmd == aServer) {
      log_set_file(logfile);
      log_set_prefix(
          NULL, GPGRT_LOG_WITH_PREFIX | GPGRT_LOG_WITH_TIME | GPGRT_LOG_WITH_PID);
    }
  
    if (gnupg_faked_time_p()) {
      gnupg_isotime_t tbuf;
  
      log_info(_("WARNING: running with faked system time: "));
      gnupg_get_isotime(tbuf);
      dump_isotime(tbuf);
      log_printf("\n");
    }
  
    /* Print a warning if an argument looks like an option.  */
    if (!opt.quiet && !(pargs.flags & ARGPARSE_FLAG_STOP_SEEN)) {
      int i;
  
      for (i = 0; i < argc; i++)
        if (argv[i][0] == '-' && argv[i][1] == '-')
          log_info(_("Note: '%s' is not considered an option\n"), argv[i]);
    }
  
    /*FIXME    if (opt.batch) */
    /*      tty_batchmode (1); */
  
    gcry_control(GCRYCTL_RESUME_SECMEM_WARN);
  
    set_debug();
  
    /* The mapping functions may try to load an module and we may have
       disabled an algorithm.  We remap the commonly used algorithms to
       the OIDs for convenience.  We need to work with the OIDs because
       they are used to check whether the encryption mode is actually
       available. */
    if (!strcmp(opt.def_cipher_algoid, "3DES"))
      opt.def_cipher_algoid = "1.2.840.113549.3.7";
    else if (!strcmp(opt.def_cipher_algoid, "AES") ||
             !strcmp(opt.def_cipher_algoid, "AES128"))
      opt.def_cipher_algoid = "2.16.840.1.101.3.4.1.2";
    else if (!strcmp(opt.def_cipher_algoid, "AES192"))
      opt.def_cipher_algoid = "2.16.840.1.101.3.4.1.22";
    else if (!strcmp(opt.def_cipher_algoid, "AES256"))
      opt.def_cipher_algoid = "2.16.840.1.101.3.4.1.42";
    else if (!strcmp(opt.def_cipher_algoid, "SERPENT") ||
             !strcmp(opt.def_cipher_algoid, "SERPENT128"))
      opt.def_cipher_algoid = "1.3.6.1.4.1.11591.13.2.2";
    else if (!strcmp(opt.def_cipher_algoid, "SERPENT192"))
      opt.def_cipher_algoid = "1.3.6.1.4.1.11591.13.2.22";
    else if (!strcmp(opt.def_cipher_algoid, "SERPENT256"))
      opt.def_cipher_algoid = "1.3.6.1.4.1.11591.13.2.42";
    else if (!strcmp(opt.def_cipher_algoid, "CAMELLIA") ||
             !strcmp(opt.def_cipher_algoid, "CAMELLIA128"))
      opt.def_cipher_algoid = "1.2.392.200011.61.1.1.1.2";
    else if (!strcmp(opt.def_cipher_algoid, "CAMELLIA192"))
      opt.def_cipher_algoid = "1.2.392.200011.61.1.1.1.3";
    else if (!strcmp(opt.def_cipher_algoid, "CAMELLIA256"))
      opt.def_cipher_algoid = "1.2.392.200011.61.1.1.1.4";
  
    if (!gcry_cipher_map_name(opt.def_cipher_algoid) ||
        !gcry_cipher_mode_from_oid(opt.def_cipher_algoid))
      log_error(_("selected cipher algorithm is invalid\n"));
  
    if (forced_digest_algo) {
      opt.forced_digest_algo = gcry_md_map_name(forced_digest_algo);
      if (our_md_test_algo(opt.forced_digest_algo))
        log_error(_("selected digest algorithm is invalid\n"));
    }
    if (extra_digest_algo) {
      opt.extra_digest_algo = gcry_md_map_name(extra_digest_algo);
      if (our_md_test_algo(opt.extra_digest_algo))
        log_error(_("selected digest algorithm is invalid\n"));
    }
  
    /* Check our chosen algorithms against the list of allowed
     * algorithms in the current compliance mode, and fail hard if it is
     * not.  This is us being nice to the user informing her early that
     * the chosen algorithms are not available.  We also check and
     * enforce this right before the actual operation.  */
    if (!gnupg_cipher_is_allowed(
            opt.compliance, cmd == aEncr || cmd == aSignEncr,
            (cipher_algo_t)(gcry_cipher_map_name(opt.def_cipher_algoid)),
            GCRY_CIPHER_MODE_NONE) &&
        !gnupg_cipher_is_allowed(
            opt.compliance, cmd == aEncr || cmd == aSignEncr,
            (cipher_algo_t)(gcry_cipher_mode_from_oid(opt.def_cipher_algoid)),
            GCRY_CIPHER_MODE_NONE))
      log_error(_("you may not use cipher algorithm '%s'"
                  " while in %s mode\n"),
                opt.def_cipher_algoid,
                gnupg_compliance_option_string(opt.compliance));
  
    if (forced_digest_algo &&
        !gnupg_digest_is_allowed(
            opt.compliance, cmd == aSign || cmd == aSignEncr || cmd == aClearsign,
            (digest_algo_t)(opt.forced_digest_algo)))
      log_error(_("you may not use digest algorithm '%s'"
                  " while in %s mode\n"),
                forced_digest_algo,
                gnupg_compliance_option_string(opt.compliance));
  
    if (extra_digest_algo &&
        !gnupg_digest_is_allowed(
            opt.compliance, cmd == aSign || cmd == aSignEncr || cmd == aClearsign,
            (digest_algo_t)(opt.extra_digest_algo)))
      log_error(_("you may not use digest algorithm '%s'"
                  " while in %s mode\n"),
                forced_digest_algo,
                gnupg_compliance_option_string(opt.compliance));
  
    if (log_get_errorcount(0)) gpgsm_exit(2);
  
    if (!cmd && opt.fingerprint && !with_fpr) set_cmd(&cmd, aListKeys);
  
    /* Add default keybox. */
    if (!nrings && default_keyring) {
      int created;
  
      sm_keydb_add_resource(&ctrl, "pubring.kbx", 0, &created);
      if (created && !no_common_certs_import) {
        /* Import the standard certificates for a new default keybox. */
        char *filelist[2];
  
        filelist[0] = make_filename(gnupg_datadir(), "com-certs.pem", NULL);
        filelist[1] = NULL;
        if (!access(filelist[0], F_OK)) {
          log_info(_("importing common certificates '%s'\n"), filelist[0]);
          gpgsm_import_files(&ctrl, 1, filelist, open_read);
        }
        xfree(filelist[0]);
      }
    }
    for (sl = nrings; sl; sl = sl->next)
      sm_keydb_add_resource(&ctrl, sl->d, 0, NULL);
    FREE_STRLIST(nrings);
  
    if (!do_not_setup_keys) {
      for (sl = locusr; sl; sl = sl->next) {
        int rc = gpgsm_add_to_certlist(&ctrl, sl->d, 1, &signerlist, 0);
        if (rc) {
          log_error(_("can't sign using '%s': %s\n"), sl->d, gpg_strerror(rc));
          gpgsm_status2(&ctrl, STATUS_INV_SGNR, get_inv_recpsgnr_code(rc), sl->d,
                        NULL);
          gpgsm_status2(&ctrl, STATUS_INV_RECP, get_inv_recpsgnr_code(rc), sl->d,
                        NULL);
        }
      }
  
      /* Build the recipient list.  We first add the regular ones and then
         the encrypt-to ones because the underlying function will silently
         ignore duplicates and we can't allow keeping a duplicate which is
         flagged as encrypt-to as the actually encrypt function would then
         complain about no (regular) recipients. */
      for (sl = remusr; sl; sl = sl->next)
        if (!(sl->flags & 1))
          do_add_recipient(&ctrl, sl->d, &recplist, 0, recp_required);
      if (!opt.no_encrypt_to) {
        for (sl = remusr; sl; sl = sl->next)
          if ((sl->flags & 1))
            do_add_recipient(&ctrl, sl->d, &recplist, 1, recp_required);
      }
    }
  
    if (log_get_errorcount(0))
      gpgsm_exit(1); /* Must stop for invalid recipients. */
  
    /* Dispatch command.  */
    switch (cmd) {
      case aServer:
        if (debug_wait) {
          log_debug("waiting for debugger - my pid is %u .....\n",
                    (unsigned int)getpid());
          gnupg_sleep(debug_wait);
          log_debug("... okay\n");
        }
        gpgsm_server(recplist);
        break;
  
      case aCallDirmngr:
        if (!argc)
          wrong_args("--call-dirmngr <command> {args}");
        else if (gpgsm_dirmngr_run_command(&ctrl, *argv, argc - 1, argv + 1))
          gpgsm_exit(1);
        break;
  
      case aCallProtectTool:
        run_protect_tool(argc, argv);
        break;
  
      case aEncr: /* Encrypt the given file. */
      {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        set_binary(stdin);
  
        if (!argc) /* Source is stdin. */
          gpgsm_encrypt(&ctrl, recplist, 0, fp);
        else if (argc == 1) /* Source is the given file. */
          gpgsm_encrypt(&ctrl, recplist, open_read(*argv), fp);
        else
          wrong_args("--encrypt [datafile]");
  
        es_fclose(fp);
      } break;
  
      case aSign: /* Sign the given file. */
      {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        /* Fixme: We should also allow concatenation of multiple files for
           signing because that is what gpg does.*/
        set_binary(stdin);
        if (!argc) /* Create from stdin. */
          gpgsm_sign(&ctrl, signerlist, 0, detached_sig, fp);
        else if (argc == 1) /* From file. */
          gpgsm_sign(&ctrl, signerlist, open_read(*argv), detached_sig, fp);
        else
          wrong_args("--sign [datafile]");
  
        es_fclose(fp);
      } break;
  
      case aSignEncr: /* sign and encrypt the given file */
        log_error("this command has not yet been implemented\n");
        break;
  
      case aClearsign: /* make a clearsig */
        log_error("this command has not yet been implemented\n");
        break;
  
      case aVerify: {
        estream_t fp = NULL;
  
        set_binary(stdin);
        if (argc == 2 && opt.outfile)
          log_info("option --output ignored for a detached signature\n");
        else if (opt.outfile)
          fp = open_es_fwrite(opt.outfile);
  
        if (!argc)
          gpgsm_verify(&ctrl, 0, -1, fp); /* normal signature from stdin */
        else if (argc == 1)
          gpgsm_verify(&ctrl, open_read(*argv), -1, fp); /* std signature */
        else if (argc == 2) /* detached signature (sig, detached) */
          gpgsm_verify(&ctrl, open_read(*argv), open_read(argv[1]), NULL);
        else
          wrong_args("--verify [signature [detached_data]]");
  
        es_fclose(fp);
      } break;
  
      case aDecrypt: {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        set_binary(stdin);
        if (!argc)
          gpgsm_decrypt(&ctrl, 0, fp); /* from stdin */
        else if (argc == 1)
          gpgsm_decrypt(&ctrl, open_read(*argv), fp); /* from file */
        else
          wrong_args("--decrypt [filename]");
  
        es_fclose(fp);
      } break;
  
      case aDeleteKey:
        for (sl = NULL; argc; argc--, argv++) add_to_strlist(&sl, *argv);
        gpgsm_delete(&ctrl, sl);
        free_strlist(sl);
        break;
  
      case aListChain:
      case aDumpChain:
        ctrl.with_chain = 1; /* fall through */
      case aListKeys:
      case aDumpKeys:
      case aListExternalKeys:
      case aDumpExternalKeys:
      case aListSecretKeys:
      case aDumpSecretKeys: {
        unsigned int mode;
        estream_t fp;
  
        switch (cmd) {
          case aListChain:
          case aListKeys:
            mode = (0 | 0 | (1 << 6));
            break;
          case aDumpChain:
          case aDumpKeys:
            mode = (256 | 0 | (1 << 6));
            break;
          case aListExternalKeys:
            mode = (0 | 0 | (1 << 7));
            break;
          case aDumpExternalKeys:
            mode = (256 | 0 | (1 << 7));
            break;
          case aListSecretKeys:
            mode = (0 | 2 | (1 << 6));
            break;
          case aDumpSecretKeys:
            mode = (256 | 2 | (1 << 6));
            break;
          default:
            BUG();
        }
  
        fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
        for (sl = NULL; argc; argc--, argv++) add_to_strlist(&sl, *argv);
        gpgsm_list_keys(&ctrl, sl, fp, mode);
        free_strlist(sl);
        es_fclose(fp);
      } break;
  
      case aKeygen: /* Generate a key; well kind of. */
      {
        estream_t fpin = NULL;
        estream_t fpout;
  
        if (opt.batch) {
          if (!argc) /* Create from stdin. */
            fpin = open_es_fread("-", "r");
          else if (argc == 1) /* From file. */
            fpin = open_es_fread(*argv, "r");
          else
            wrong_args("--generate-key --batch [parmfile]");
        }
  
        fpout = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        if (fpin)
          gpgsm_genkey(&ctrl, fpin, fpout);
        else
          gpgsm_gencertreq_tty(&ctrl, fpout);
  
        es_fclose(fpout);
      } break;
  
      case aImport:
        gpgsm_import_files(&ctrl, argc, argv, open_read);
        break;
  
      case aExport: {
        estream_t fp;
  
        fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
        for (sl = NULL; argc; argc--, argv++) add_to_strlist(&sl, *argv);
        gpgsm_export(&ctrl, sl, fp);
        free_strlist(sl);
        es_fclose(fp);
      } break;
  
      case aExportSecretKeyP12: {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        if (argc == 1)
          gpgsm_p12_export(&ctrl, *argv, fp, 0);
        else
          wrong_args("--export-secret-key-p12 KEY-ID");
        if (fp != es_stdout) es_fclose(fp);
      } break;
  
      case aExportSecretKeyP8: {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        if (argc == 1)
          gpgsm_p12_export(&ctrl, *argv, fp, 1);
        else
          wrong_args("--export-secret-key-p8 KEY-ID");
        if (fp != es_stdout) es_fclose(fp);
      } break;
  
      case aExportSecretKeyRaw: {
        estream_t fp = open_es_fwrite(opt.outfile ? opt.outfile : "-");
  
        if (argc == 1)
          gpgsm_p12_export(&ctrl, *argv, fp, 2);
        else
          wrong_args("--export-secret-key-raw KEY-ID");
        if (fp != es_stdout) es_fclose(fp);
      } break;
  
      case aSendKeys:
      case aRecvKeys:
        log_error("this command has not yet been implemented\n");
        break;
  
      case aLearnCard:
        if (argc)
          wrong_args("--learn-card");
        else {
          int rc = gpgsm_agent_learn(&ctrl);
          if (rc) log_error("error learning card: %s\n", gpg_strerror(rc));
        }
        break;
  
      case aPasswd:
        if (argc != 1)
          wrong_args("--change-passphrase <key-Id>");
        else {
          int rc;
          ksba_cert_t cert = NULL;
          char *grip = NULL;
  
          rc = gpgsm_find_cert(&ctrl, *argv, NULL, &cert);
          if (rc)
            ;
          else if (!(grip = gpgsm_get_keygrip_hexstring(cert)))
            rc = GPG_ERR_BUG;
          else {
            char *desc = gpgsm_format_keydesc(cert);
            rc = gpgsm_agent_passwd(&ctrl, grip, desc);
            xfree(desc);
          }
          if (rc) log_error("error changing passphrase: %s\n", gpg_strerror(rc));
          xfree(grip);
          ksba_cert_release(cert);
        }
        break;
  
      case aSm_KeydbClearSomeCertFlags:
        for (sl = NULL; argc; argc--, argv++) add_to_strlist(&sl, *argv);
        sm_keydb_clear_some_cert_flags(&ctrl, sl);
        free_strlist(sl);
        break;
  
      default:
        log_error(_("invalid command (there is no implicit command)\n"));
        break;
    }
  
    /* cleanup */
    gpgsm_release_certlist(recplist);
    gpgsm_release_certlist(signerlist);
    FREE_STRLIST(remusr);
    FREE_STRLIST(locusr);
    gpgsm_exit(0);
    return 8; /*NOTREACHED*/
  }
  
  void gpgsm_exit(int rc) {
    if (opt.debug & DBG_MEMSTAT_VALUE) {
      gcry_control(GCRYCTL_DUMP_MEMORY_STATS);
    }
    if (opt.debug) gcry_control(GCRYCTL_DUMP_SECMEM_STATS);
    gcry_control(GCRYCTL_TERM_SECMEM);
    rc = rc ? rc : log_get_errorcount(0) ? 2 : gpgsm_errors_seen ? 1 : 0;
    exit(rc);
  }
  
  void gpgsm_init_default_ctrl(struct server_control_s *ctrl) {
    ctrl->include_certs = default_include_certs;
    ctrl->use_ocsp = opt.enable_ocsp;
    ctrl->validation_model = default_validation_model;
    ctrl->offline = opt.disable_dirmngr;
  }
  
  int gpgsm_parse_validation_model(const char *model) {
    if (!ascii_strcasecmp(model, "shell"))
      return 0;
    else if (!ascii_strcasecmp(model, "chain"))
      return 1;
    else if (!ascii_strcasecmp(model, "steed"))
      return 2;
    else
      return -1;
  }
  
  /* Open the FILENAME for read and return the file descriptor.  Stop
     with an error message in case of problems.  "-" denotes stdin and
     if special filenames are allowed the given fd is opened instead.  */
  static int open_read(const char *filename) {
    int fd;
  
    if (filename[0] == '-' && !filename[1]) {
      set_binary(stdin);
      return 0; /* stdin */
    }
    fd = open(filename, O_RDONLY | O_BINARY);
    if (fd == -1) {
      log_error(_("can't open '%s': %s\n"), filename, strerror(errno));
      gpgsm_exit(2);
    }
    return fd;
  }
  
  /* Same as open_read but return an estream_t.  */
  static estream_t open_es_fread(const char *filename, const char *mode) {
    int fd;
    estream_t fp;
  
    if (filename[0] == '-' && !filename[1]) fd = fileno(stdin);
    if (fd != -1) {
      fp = es_fdopen_nc(fd, mode);
      if (!fp) {
        log_error("es_fdopen(%d) failed: %s\n", fd, strerror(errno));
        gpgsm_exit(2);
      }
      return fp;
    }
    fp = es_fopen(filename, mode);
    if (!fp) {
      log_error(_("can't open '%s': %s\n"), filename, strerror(errno));
      gpgsm_exit(2);
    }
    return fp;
  }
  
  /* Open FILENAME for fwrite and return an extended stream.  Stop with
     an error message in case of problems.  "-" denotes stdout and if
     special filenames are allowed the given fd is opened instead.
     Caller must close the returned stream. */
  static estream_t open_es_fwrite(const char *filename) {
    int fd;
    estream_t fp;
  
    if (filename[0] == '-' && !filename[1]) {
      fflush(stdout);
      fp = es_fdopen_nc(fileno(stdout), "wb");
      return fp;
    }
  
    fp = es_fopen(filename, "wb");
    if (!fp) {
      log_error(_("can't open '%s': %s\n"), filename, strerror(errno));
      gpgsm_exit(2);
    }
    return fp;
  }
  
  static void run_protect_tool(int argc, char **argv) {
  #ifdef HAVE_W32_SYSTEM
    (void)argc;
    (void)argv;
  #else
    const char *pgm;
    char **av;
    int i;
  
    if (!opt.protect_tool_program || !*opt.protect_tool_program)
      pgm = gnupg_module_name(GNUPG_MODULE_NAME_PROTECT_TOOL);
    else
      pgm = opt.protect_tool_program;
  
    av = (char **)xcalloc(argc + 2, sizeof *av);
    av[0] = (char *)strrchr(pgm, '/');
    if (!av[0]) av[0] = xstrdup(pgm);
    for (i = 1; argc; i++, argc--, argv++) av[i] = *argv;
    av[i] = NULL;
    execv(pgm, av);
    log_error("error executing '%s': %s\n", pgm, strerror(errno));
  #endif /*!HAVE_W32_SYSTEM*/
    gpgsm_exit(2);
  }
  