/* gpgcompose.c - Maintainer tool to create OpenPGP messages by hand. * Copyright (C) 2016 g10 Code GmbH * * 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 . */ #include #include #include "gpg.h" #include "packet.h" #include "keydb.h" #include "main.h" #include "options.h" static int do_debug; #define debug(fmt, ...) \ do { if (do_debug) log_debug (fmt, ##__VA_ARGS__); } while (0) /* --encryption, for instance, adds a filter in front of out. There is an operator (--encryption-pop) to end this. We use the following infrastructure to make it easy to pop the state. */ struct filter { void *func; void *context; int pkttype; int partial_block_mode; struct filter *next; }; static struct filter *filters; static void filter_push (iobuf_t out, void *func, void *context, int type, int partial_block_mode) { gpg_error_t err; struct filter *f = xmalloc_clear (sizeof (*f)); f->next = filters; f->func = func; f->context = context; f->pkttype = type; f->partial_block_mode = partial_block_mode; filters = f; err = iobuf_push_filter (out, func, context); if (err) log_fatal ("Adding filter: %s\n", gpg_strerror (err)); } static void filter_pop (iobuf_t out, int expected_type) { gpg_error_t err; struct filter *f = filters; log_assert (f); if (f->pkttype != expected_type) log_fatal ("Attempted to pop a %s container, " "but current container is a %s container.\n", pkttype_str (f->pkttype), pkttype_str (expected_type)); if (f->pkttype == PKT_ENCRYPTED || f->pkttype == PKT_ENCRYPTED_MDC) { err = iobuf_pop_filter (out, f->func, f->context); if (err) log_fatal ("Popping encryption filter: %s\n", gpg_strerror (err)); } else log_fatal ("FILTERS appears to be corrupted.\n"); if (f->partial_block_mode) iobuf_set_partial_body_length_mode (out, 0); filters = f->next; xfree (f); } /* Return if CIPHER_ID is a valid cipher. */ static int valid_cipher (int cipher_id) { return (cipher_id == CIPHER_ALGO_IDEA || cipher_id == CIPHER_ALGO_3DES || cipher_id == CIPHER_ALGO_CAST5 || cipher_id == CIPHER_ALGO_BLOWFISH || cipher_id == CIPHER_ALGO_AES || cipher_id == CIPHER_ALGO_AES192 || cipher_id == CIPHER_ALGO_AES256 || cipher_id == CIPHER_ALGO_TWOFISH || cipher_id == CIPHER_ALGO_CAMELLIA128 || cipher_id == CIPHER_ALGO_CAMELLIA192 || cipher_id == CIPHER_ALGO_CAMELLIA256); } /* Parse a session key encoded as a string of the form x:HEXDIGITS where x is the algorithm id. (This is the format emitted by gpg --show-session-key.) */ struct session_key { int algo; int keylen; char *key; }; static struct session_key parse_session_key (const char *option, char *p, int require_algo) { char *tail; struct session_key sk; memset (&sk, 0, sizeof (sk)); /* Check for the optional "cipher-id:" at the start of the string. */ errno = 0; sk.algo = strtol (p, &tail, 10); if (! errno && tail && *tail == ':') { if (! valid_cipher (sk.algo)) log_info ("%s: %d is not a known cipher (but using anyways)\n", option, sk.algo); p = tail + 1; } else if (require_algo) log_fatal ("%s: Session key must have the form algo:HEXCHARACTERS.\n", option); else sk.algo = 0; /* Ignore a leading 0x. */ if (p[0] == '0' && p[1] == 'x') p += 2; if (strlen (p) % 2 != 0) log_fatal ("%s: session key must consist of an even number of hexadecimal characters.\n", option); sk.keylen = strlen (p) / 2; sk.key = xmalloc (sk.keylen); if (hex2bin (p, sk.key, sk.keylen) == -1) log_fatal ("%s: Session key must only contain hexadecimal characters\n", option); return sk; } /* A callback. OPTION_STR is the option that was matched. ARGC is the number of arguments following the option and ARGV are those arguments. (Thus, argv[0] is the first string following the option and argv[-1] is the option.) COOKIE is the opaque value passed to process_options. */ typedef int (*option_prcessor_t) (const char *option_str, int argc, char *argv[], void *cookie); struct option { /* The option that this matches. This must start with "--" or be the empty string. The empty string matches bare arguments. */ const char *option; /* The function to call to process this option. */ option_prcessor_t func; /* Documentation. */ const char *help; }; /* Merge two lists of options. Note: this makes a shallow copy! The caller must xfree() the result. */ static struct option * merge_options (struct option a[], struct option b[]) { int i, j; struct option *c; for (i = 0; a[i].option; i ++) ; for (j = 0; b[j].option; j ++) ; c = xmalloc ((i + j + 1) * sizeof (struct option)); memcpy (c, a, i * sizeof (struct option)); memcpy (&c[i], b, j * sizeof (struct option)); c[i + j].option = NULL; if (a[i].help && b[j].help) c[i + j].help = xasprintf ("%s\n\n%s", a[i].help, b[j].help); else if (a[i].help) c[i + j].help = a[i].help; else if (b[j].help) c[i + j].help = b[j].help; return c; } /* Returns whether ARG is an option. All options start with --. */ static int is_option (const char *arg) { return arg[0] == '-' && arg[1] == '-'; } /* OPTIONS is a NULL terminated array of struct option:s. Finds the entry that is the same as ARG. Returns -1 if no entry is found. The empty string option matches bare arguments. */ static int match_option (const struct option options[], const char *arg) { int i; int bare_arg = ! is_option (arg); for (i = 0; options[i].option; i ++) if ((! bare_arg && strcmp (options[i].option, arg) == 0) /* Non-options match the empty string. */ || (bare_arg && options[i].option[0] == '\0')) return i; return -1; } static void show_help (struct option options[]) { int i; int max_length = 0; int space; for (i = 0; options[i].option; i ++) { const char *option = options[i].option[0] ? options[i].option : "ARG"; int l = strlen (option); if (l > max_length) max_length = l; } space = 72 - (max_length + 2); if (space < 40) space = 40; for (i = 0; ; i ++) { const char *option = options[i].option; const char *help = options[i].help; int l; int j; char *tmp; char *formatted; char *p; char *newline; if (! option && ! help) break; if (option) { const char *o = option[0] ? option : "ARG"; l = strlen (o); fprintf (stderr, "%s", o); } if (! help) { fputc ('\n', stderr); continue; } if (option) for (j = l; j < max_length + 2; j ++) fputc (' ', stderr); #define BOLD_START "\033[1m" #define NORMAL_RESTORE "\033[0m" #define BOLD(x) BOLD_START x NORMAL_RESTORE if (! option || options[i].func) tmp = (char *) help; else tmp = xasprintf ("%s " BOLD("(Unimplemented.)"), help); if (! option) space = 72; formatted = format_text (tmp, 0, space, space + 4); if (tmp != help) xfree (tmp); if (! option) { fprintf (stderr, "\n%s\n", formatted); break; } for (p = formatted; p && *p; p = (*newline == '\0') ? newline : newline + 1) { newline = strchr (p, '\n'); if (! newline) newline = &p[strlen (p)]; l = (size_t) newline - (size_t) p; if (p != formatted) for (j = 0; j < max_length + 2; j ++) fputc (' ', stderr); fwrite (p, l, 1, stderr); fputc ('\n', stderr); } xfree (formatted); } } /* Return value is number of consumed argv elements. */ static int process_options (const char *parent_option, struct option break_options[], struct option local_options[], void *lcookie, struct option global_options[], void *gcookie, int argc, char *argv[]) { int i; for (i = 0; i < argc; i ++) { int j; struct option *option; void *cookie; int bare_arg; option_prcessor_t func; int consumed; if (break_options) { j = match_option (break_options, argv[i]); if (j != -1) /* Match. Break out. */ return i; } j = match_option (local_options, argv[i]); if (j == -1) { if (global_options) j = match_option (global_options, argv[i]); if (j == -1) { if (strcmp (argv[i], "--help") == 0) { if (! global_options) show_help (local_options); else { struct option *combined = merge_options (local_options, global_options); show_help (combined); xfree (combined); } g10_exit (0); } if (parent_option) log_fatal ("%s: Unknown option: %s\n", parent_option, argv[i]); else log_fatal ("Unknown option: %s\n", argv[i]); } option = &global_options[j]; cookie = gcookie; } else { option = &local_options[j]; cookie = lcookie; } bare_arg = strcmp (option->option, "") == 0; func = option->func; if (! func) { if (bare_arg) log_fatal ("Bare arguments unimplemented.\n"); else log_fatal ("Unimplemented option: %s\n", option->option); } consumed = func (bare_arg ? parent_option : argv[i], argc - i - !bare_arg, &argv[i + !bare_arg], cookie); i += consumed; if (bare_arg) i --; } return i; } /* The keys, subkeys, user ids and user attributes in the order that they were added. */ PACKET components[20]; /* The number of components. */ int ncomponents; static int add_component (int pkttype, void *component) { int i = ncomponents ++; log_assert (i < sizeof (components) / sizeof (components[0])); log_assert (pkttype == PKT_PUBLIC_KEY || pkttype == PKT_PUBLIC_SUBKEY || pkttype == PKT_SECRET_KEY || pkttype == PKT_SECRET_SUBKEY || pkttype == PKT_USER_ID || pkttype == PKT_ATTRIBUTE); components[i].pkttype = pkttype; components[i].pkt.generic = component; return i; } static void dump_component (PACKET *pkt) { struct kbnode_struct kbnode; if (! do_debug) return; memset (&kbnode, 0, sizeof (kbnode)); kbnode.pkt = pkt; dump_kbnode (&kbnode); } /* Returns the first primary key in COMPONENTS or NULL if there is none. */ static PKT_public_key * primary_key (void) { int i; for (i = 0; i < ncomponents; i ++) if (components[i].pkttype == PKT_PUBLIC_KEY) return components[i].pkt.public_key; return NULL; } /* The last session key (updated when adding a SK-ESK, PK-ESK or SED packet. */ static DEK session_key; static int user_id (const char *option, int argc, char *argv[], void *cookie); static int public_key (const char *option, int argc, char *argv[], void *cookie); static int sk_esk (const char *option, int argc, char *argv[], void *cookie); static int pk_esk (const char *option, int argc, char *argv[], void *cookie); static int encrypted (const char *option, int argc, char *argv[], void *cookie); static int encrypted_pop (const char *option, int argc, char *argv[], void *cookie); static int literal (const char *option, int argc, char *argv[], void *cookie); static int signature (const char *option, int argc, char *argv[], void *cookie); static int copy (const char *option, int argc, char *argv[], void *cookie); static struct option major_options[] = { { "--user-id", user_id, "Create a user id packet." }, { "--public-key", public_key, "Create a public key packet." }, { "--private-key", NULL, "Create a private key packet." }, { "--public-subkey", public_key, "Create a subkey packet." }, { "--private-subkey", NULL, "Create a private subkey packet." }, { "--sk-esk", sk_esk, "Create a symmetric-key encrypted session key packet." }, { "--pk-esk", pk_esk, "Create a public-key encrypted session key packet." }, { "--encrypted", encrypted, "Create a symmetrically encrypted data packet." }, { "--encrypted-mdc", encrypted, "Create a symmetrically encrypted and integrity protected data packet." }, { "--encrypted-pop", encrypted_pop, "Pop an encryption container." }, { "--compressed", NULL, "Create a compressed data packet." }, { "--literal", literal, "Create a literal (plaintext) data packet." }, { "--signature", signature, "Create a signature packet." }, { "--onepass-sig", NULL, "Create a one-pass signature packet." }, { "--copy", copy, "Copy the specified file." }, { NULL, NULL, "To get more information about a given command, use:\n\n" " $ gpgcompose --command --help to list a command's options."}, }; static struct option global_options[] = { { NULL, NULL, NULL }, }; /* Make our lives easier and use a static limit for the user name. 10k is way more than enough anyways... */ const int user_id_max_len = 10 * 1024; static int user_id_name (const char *option, int argc, char *argv[], void *cookie) { PKT_user_id *uid = cookie; int l; if (argc == 0) log_fatal ("Usage: %s USER_ID\n", option); if (uid->len) log_fatal ("Attempt to set user id multiple times.\n"); l = strlen (argv[0]); if (l > user_id_max_len) log_fatal ("user id too long (max: %d)\n", user_id_max_len); memcpy (uid->name, argv[0], l); uid->name[l] = 0; uid->len = l; return 1; } static struct option user_id_options[] = { { "", user_id_name, "Set the user id. This is usually in the format " "\"Name (comment) \"" }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --user-id \"USERID\" | " GPG_NAME " --list-packets" } }; static int user_id (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; gpg_error_t err; PKT_user_id *uid = xmalloc_clear (sizeof (*uid) + user_id_max_len); int c = add_component (PKT_USER_ID, uid); int processed; processed = process_options (option, major_options, user_id_options, uid, global_options, NULL, argc, argv); if (! uid->len) log_fatal ("%s: user id not given", option); err = build_packet (out, &components[c]); if (err) log_fatal ("Serializing user id packet: %s\n", gpg_strerror (err)); debug ("Wrote user id packet:\n"); dump_component (&components[c]); return processed; } static int pk_search_terms (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; KEYDB_HANDLE hd; KEYDB_SEARCH_DESC desc; kbnode_t kb; PKT_public_key *pk = cookie; PKT_public_key *pk_ref; int i; if (argc == 0) log_fatal ("Usage: %s KEYID\n", option); if (pk->pubkey_algo) log_fatal ("%s: multiple keys provided\n", option); err = classify_user_id (argv[0], &desc, 0); if (err) log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); hd = keydb_new (); err = keydb_search (hd, &desc, 1, NULL); if (err) log_fatal ("looking up '%s': %s\n", argv[0], gpg_strerror (err)); err = keydb_get_keyblock (hd, &kb); if (err) log_fatal ("retrieving keyblock for '%s': %s\n", argv[0], gpg_strerror (err)); keydb_release (hd); pk_ref = kb->pkt->pkt.public_key; /* Copy the timestamp (if not already set), algo and public key parameters. */ if (! pk->timestamp) pk->timestamp = pk_ref->timestamp; pk->pubkey_algo = pk_ref->pubkey_algo; for (i = 0; i < pubkey_get_npkey (pk->pubkey_algo); i ++) pk->pkey[i] = gcry_mpi_copy (pk_ref->pkey[i]); release_kbnode (kb); return 1; } static int pk_timestamp (const char *option, int argc, char *argv[], void *cookie) { PKT_public_key *pk = cookie; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s TIMESTAMP\n", option); errno = 0; pk->timestamp = parse_timestamp (argv[0], &tail); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); return 1; } #define TIMESTAMP_HELP \ "Either as seconds since the epoch or as an ISO 8601 formatted " \ "string (yyyymmddThhmmss, where the T is a literal)." static struct option pk_options[] = { { "--timestamp", pk_timestamp, "The creation time. " TIMESTAMP_HELP }, { "", pk_search_terms, "The key to copy the creation time and public key parameters from." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --public-key $KEYID --user-id \"USERID\" \\\n" " | " GPG_NAME " --list-packets" } }; static int public_key (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; iobuf_t out = cookie; PKT_public_key *pk; int c; int processed; int t = (strcmp (option, "--public-key") == 0 ? PKT_PUBLIC_KEY : PKT_PUBLIC_SUBKEY); (void) option; pk = xmalloc_clear (sizeof (*pk)); pk->version = 4; c = add_component (t, pk); processed = process_options (option, major_options, pk_options, pk, global_options, NULL, argc, argv); if (! pk->pubkey_algo) log_fatal ("%s: key to extract public key parameters from not given", option); /* Clear the keyid in case we updated one of the relevant fields after accessing it. */ pk->keyid[0] = pk->keyid[1] = 0; err = build_packet (out, &components[c]); if (err) log_fatal ("serializing %s packet: %s\n", t == PKT_PUBLIC_KEY ? "public key" : "subkey", gpg_strerror (err)); debug ("Wrote %s packet:\n", t == PKT_PUBLIC_KEY ? "public key" : "subkey"); dump_component (&components[c]); return processed; } struct siginfo { /* Key with which to sign. */ kbnode_t issuer_kb; PKT_public_key *issuer_pk; /* Overrides the issuer's key id. */ u32 issuer_keyid[2]; /* Sets the issuer's keyid to the primary key's key id. */ int issuer_keyid_self; /* Key to sign. */ PKT_public_key *pk; /* Subkey to sign. */ PKT_public_key *sk; /* User id to sign. */ PKT_user_id *uid; int class; int digest_algo; u32 timestamp; u32 key_expiration; byte *cipher_algorithms; int cipher_algorithms_len; byte *digest_algorithms; int digest_algorithms_len; byte *compress_algorithms; int compress_algorithms_len; u32 expiration; int exportable_set; int exportable; int revocable_set; int revocable; int trust_level_set; byte trust_args[2]; char *trust_scope; struct revocation_key *revocation_key; int nrevocation_keys; struct notation *notations; byte *key_server_preferences; int key_server_preferences_len; char *key_server; int primary_user_id_set; int primary_user_id; char *policy_uri; byte *key_flags; int key_flags_len; char *signers_user_id; byte reason_for_revocation_code; char *reason_for_revocation; byte *features; int features_len; /* Whether to corrupt the signature. */ int corrupt; }; static int sig_issuer (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; KEYDB_HANDLE hd; KEYDB_SEARCH_DESC desc; struct siginfo *si = cookie; if (argc == 0) log_fatal ("Usage: %s KEYID\n", option); if (si->issuer_pk) log_fatal ("%s: multiple keys provided\n", option); err = classify_user_id (argv[0], &desc, 0); if (err) log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); hd = keydb_new (); err = keydb_search (hd, &desc, 1, NULL); if (err) log_fatal ("looking up '%s': %s\n", argv[0], gpg_strerror (err)); err = keydb_get_keyblock (hd, &si->issuer_kb); if (err) log_fatal ("retrieving keyblock for '%s': %s\n", argv[0], gpg_strerror (err)); keydb_release (hd); si->issuer_pk = si->issuer_kb->pkt->pkt.public_key; return 1; } static int sig_issuer_keyid (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; KEYDB_SEARCH_DESC desc; struct siginfo *si = cookie; if (argc == 0) log_fatal ("Usage: %s KEYID|self\n", option); if (si->issuer_keyid[0] || si->issuer_keyid[1] || si->issuer_keyid_self) log_fatal ("%s given multiple times.\n", option); if (strcasecmp (argv[0], "self") == 0) { si->issuer_keyid_self = 1; return 1; } err = classify_user_id (argv[0], &desc, 0); if (err) log_fatal ("search terms '%s': %s\n", argv[0], gpg_strerror (err)); if (desc.mode != KEYDB_SEARCH_MODE_LONG_KID) log_fatal ("%s is not a valid long key id.\n", argv[0]); keyid_copy (si->issuer_keyid, desc.u.kid); return 1; } static int sig_pk (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int i; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s COMPONENT_INDEX\n", option); errno = 0; i = strtoul (argv[0], &tail, 10); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); if (i >= ncomponents) log_fatal ("%d: No such component (have %d components so far)\n", i, ncomponents); if (! (components[i].pkttype == PKT_PUBLIC_KEY || components[i].pkttype == PKT_PUBLIC_SUBKEY)) log_fatal ("Component %d is not a public key or a subkey.", i); if (strcmp (option, "--pk") == 0) { if (si->pk) log_fatal ("%s already given.\n", option); si->pk = components[i].pkt.public_key; } else if (strcmp (option, "--sk") == 0) { if (si->sk) log_fatal ("%s already given.\n", option); si->sk = components[i].pkt.public_key; } else log_fatal ("Cannot handle %s\n", option); return 1; } static int sig_user_id (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int i; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s COMPONENT_INDEX\n", option); if (si->uid) log_fatal ("%s already given.\n", option); errno = 0; i = strtoul (argv[0], &tail, 10); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); if (i >= ncomponents) log_fatal ("%d: No such component (have %d components so far)\n", i, ncomponents); if (! (components[i].pkttype != PKT_USER_ID || components[i].pkttype == PKT_ATTRIBUTE)) log_fatal ("Component %d is not a public key or a subkey.", i); si->uid = components[i].pkt.user_id; return 1; } static int sig_class (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int i; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s CLASS\n", option); errno = 0; i = strtoul (argv[0], &tail, 0); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); si->class = i; return 1; } static int sig_digest (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int i; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s DIGEST_ALGO\n", option); errno = 0; i = strtoul (argv[0], &tail, 10); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); si->digest_algo = i; return 1; } static int sig_timestamp (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s TIMESTAMP\n", option); errno = 0; si->timestamp = parse_timestamp (argv[0], &tail); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); return 1; } static int sig_expiration (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int is_expiration = strcmp (option, "--expiration") == 0; u32 *i = is_expiration ? &si->expiration : &si->key_expiration; if (! is_expiration) log_assert (strcmp (option, "--key-expiration") == 0); if (argc == 0) log_fatal ("Usage: %s DURATION\n", option); *i = parse_expire_string (argv[0]); if (*i == (u32)-1) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); return 1; } static int sig_int_list (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int nvalues = 1; char *values = xmalloc (nvalues * sizeof (values[0])); char *tail = argv[0]; int i; byte **a; int *n; if (argc == 0) log_fatal ("Usage: %s VALUE[,VALUE...]\n", option); for (i = 0; tail && *tail; i ++) { int v; char *old_tail = tail; errno = 0; v = strtol (tail, &tail, 0); if (errno || old_tail == tail || (tail && !(*tail == ',' || *tail == 0))) log_fatal ("Invalid value passed to %s (%s). " "Expected a list of comma separated numbers\n", option, argv[0]); if (! (0 <= v && v <= 255)) log_fatal ("%s: %d is out of range (Expected: 0-255)\n", option, v); if (i == nvalues) { nvalues *= 2; values = xrealloc (values, nvalues * sizeof (values[0])); } values[i] = v; if (*tail == ',') tail ++; else log_assert (*tail == 0); } if (strcmp ("--cipher-algos", option) == 0) { a = &si->cipher_algorithms; n = &si->cipher_algorithms_len; } else if (strcmp ("--digest-algos", option) == 0) { a = &si->digest_algorithms; n = &si->digest_algorithms_len; } else if (strcmp ("--compress-algos", option) == 0) { a = &si->compress_algorithms; n = &si->compress_algorithms_len; } else log_fatal ("Cannot handle %s\n", option); if (*a) log_fatal ("Option %s given multiple times.\n", option); *a = values; *n = i; return 1; } static int sig_flag (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int range[2] = {0, 255}; char *tail; int v; if (strcmp (option, "--primary-user-id") == 0) range[1] = 1; if (argc <= 1) { if (range[0] == 0 && range[1] == 1) log_fatal ("Usage: %s 0|1\n", option); else log_fatal ("Usage: %s %d-%d\n", option, range[0], range[1]); } errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || !(range[0] <= v && v <= range[1])) log_fatal ("Invalid value passed to %s (%s). Expected %d-%d\n", option, argv[0], range[0], range[1]); if (strcmp (option, "--exportable") == 0) { si->exportable_set = 1; si->exportable = v; } else if (strcmp (option, "--revocable") == 0) { si->revocable_set = 1; si->revocable = v; } else if (strcmp (option, "--primary-user-id") == 0) { si->primary_user_id_set = 1; si->primary_user_id = v; } else log_fatal ("Cannot handle %s\n", option); return 1; } static int sig_trust_level (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int i; char *tail; if (argc <= 1) log_fatal ("Usage: %s DEPTH TRUST_AMOUNT\n", option); for (i = 0; i < sizeof (si->trust_args) / sizeof (si->trust_args[0]); i ++) { int v; errno = 0; v = strtol (argv[i], &tail, 0); if (errno || (tail && *tail) || !(0 <= v && v <= 255)) log_fatal ("Invalid value passed to %s (%s). Expected 0-255\n", option, argv[i]); si->trust_args[i] = v; } si->trust_level_set = 1; return 2; } static int sig_string_arg (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; char *p = argv[0]; char **s; if (argc == 0) log_fatal ("Usage: %s STRING\n", option); if (strcmp (option, "--trust-scope") == 0) s = &si->trust_scope; else if (strcmp (option, "--key-server") == 0) s = &si->key_server; else if (strcmp (option, "--signers-user-id") == 0) s = &si->signers_user_id; else if (strcmp (option, "--policy-uri") == 0) s = &si->policy_uri; else log_fatal ("Cannot handle %s\n", option); if (*s) log_fatal ("%s already given.\n", option); *s = xstrdup (p); return 1; } static int sig_revocation_key (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; struct siginfo *si = cookie; int v; char *tail; PKT_public_key pk; struct revocation_key *revkey; if (argc < 2) log_fatal ("Usage: %s CLASS KEYID\n", option); memset (&pk, 0, sizeof (pk)); errno = 0; v = strtol (argv[0], &tail, 16); if (errno || (tail && *tail) || !(0 <= v && v <= 255)) log_fatal ("%s: Invalid class value (%s). Expected 0-255\n", option, argv[0]); pk.req_usage = PUBKEY_USAGE_SIG; err = get_pubkey_byname (NULL, NULL, &pk, argv[1], NULL, NULL, 1, 1); if (err) log_fatal ("looking up key %s: %s\n", argv[1], gpg_strerror (err)); si->nrevocation_keys ++; si->revocation_key = xrealloc (si->revocation_key, si->nrevocation_keys * sizeof (*si->revocation_key)); revkey = &si->revocation_key[si->nrevocation_keys - 1]; revkey->class = v; revkey->algid = pk.pubkey_algo; fingerprint_from_pk (&pk, revkey->fpr, NULL); release_public_key_parts (&pk); return 2; } static int sig_notation (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int is_blob = strcmp (option, "--notation") != 0; struct notation *notation; char *p = argv[0]; int p_free = 0; char *data; int data_size; int data_len; if (argc == 0) log_fatal ("Usage: %s [!<]name=value\n", option); if ((p[0] == '!' && p[1] == '<') || p[0] == '<') /* Read from a file. */ { char *filename = NULL; iobuf_t in; int prefix; if (p[0] == '<') p ++; else { /* Remove the '<', which string_to_notation does not understand, and preserve the '!'. */ p = xstrdup (&p[1]); p_free = 1; p[0] = '!'; } filename = strchr (p, '='); if (! filename) log_fatal ("No value specified. Usage: %s [!<]name=value\n", option); filename ++; prefix = (size_t) filename - (size_t) p; errno = 0; in = iobuf_open (filename); if (! in) log_fatal ("Opening '%s': %s\n", filename, errno ? strerror (errno): "unknown error"); /* A notation can be at most about a few dozen bytes short of 64k. Since this is relatively small, we just allocate that much instead of trying to dynamically size a buffer. */ data_size = 64 * 1024; data = xmalloc (data_size); log_assert (prefix <= data_size); memcpy (data, p, prefix); data_len = iobuf_read (in, &data[prefix], data_size - prefix - 1); if (data_len == -1) /* EOF => 0 bytes read. */ data_len = 0; if (data_len == data_size - prefix - 1) /* Technically, we should do another read and check for EOF, but what's one byte more or less? */ log_fatal ("Notation data doesn't fit in the packet.\n"); iobuf_close (in); /* NUL terminate it. */ data[prefix + data_len] = 0; if (p_free) xfree (p); p = data; p_free = 1; data = &p[prefix]; if (is_blob) p[prefix - 1] = 0; } else if (is_blob) { data = strchr (p, '='); if (! data) { data = p; data_len = 0; } else { p = xstrdup (p); p_free = 1; data = strchr (p, '='); log_assert (data); /* NUL terminate the name. */ *data = 0; data ++; data_len = strlen (data); } } if (is_blob) notation = blob_to_notation (p, data, data_len); else notation = string_to_notation (p, 1); if (! notation) log_fatal ("creating notation: an unknown error occured.\n"); notation->next = si->notations; si->notations = notation; if (p_free) xfree (p); return 1; } static int sig_big_endian_arg (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; char *p = argv[0]; int i; int l; char *bytes; if (argc == 0) log_fatal ("Usage: %s HEXDIGITS\n", option); /* Skip a leading "0x". */ if (p[0] == '0' && p[1] == 'x') p += 2; for (i = 0; i < strlen (p); i ++) if (!hexdigitp (&p[i])) log_fatal ("%s: argument ('%s') must consist of hex digits.\n", option, p); if (strlen (p) % 2 != 0) log_fatal ("%s: argument ('%s') must contain an even number of hex digits.\n", option, p); l = strlen (p) / 2; bytes = xmalloc (l); hex2bin (p, bytes, l); if (strcmp (option, "--key-server-preferences") == 0) { if (si->key_server_preferences) log_fatal ("%s given multiple times.\n", option); si->key_server_preferences = bytes; si->key_server_preferences_len = l; } else if (strcmp (option, "--key-flags") == 0) { if (si->key_flags) log_fatal ("%s given multiple times.\n", option); si->key_flags = bytes; si->key_flags_len = l; } else if (strcmp (option, "--features") == 0) { if (si->features) log_fatal ("%s given multiple times.\n", option); si->features = bytes; si->features_len = l; } else log_fatal ("Cannot handle %s\n", option); return 1; } static int sig_reason_for_revocation (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; int v; char *tail; if (argc < 2) log_fatal ("Usage: %s REASON_CODE REASON_STRING\n", option); errno = 0; v = strtol (argv[0], &tail, 16); if (errno || (tail && *tail) || !(0 <= v && v <= 255)) log_fatal ("%s: Invalid reason code (%s). Expected 0-255\n", option, argv[0]); if (si->reason_for_revocation) log_fatal ("%s given multiple times.\n", option); si->reason_for_revocation_code = v; si->reason_for_revocation = xstrdup (argv[1]); return 2; } static int sig_corrupt (const char *option, int argc, char *argv[], void *cookie) { struct siginfo *si = cookie; (void) option; (void) argc; (void) argv; (void) cookie; si->corrupt = 1; return 0; } static struct option sig_options[] = { { "--issuer", sig_issuer, "The key to use to generate the signature."}, { "--issuer-keyid", sig_issuer_keyid, "Set the issuer's key id. This is useful for creating a " "self-signature. As a special case, the value \"self\" refers " "to the primary key's key id. " "(RFC 4880, Section 5.2.3.5)" }, { "--pk", sig_pk, "The primary keyas an index into the components (keys and uids) " "created so far where the first component has the index 0." }, { "--sk", sig_pk, "The subkey as an index into the components (keys and uids) created " "so far where the first component has the index 0. Only needed for " "0x18, 0x19, and 0x28 signatures." }, { "--user-id", sig_user_id, "The user id as an index into the components (keys and uids) created " "so far where the first component has the index 0. Only needed for " "0x10-0x13 and 0x30 signatures." }, { "--class", sig_class, "The signature's class. Valid values are " "0x10-0x13 (user id and primary-key certification), " "0x18 (subkey binding), " "0x19 (primary key binding), " "0x1f (direct primary key signature), " "0x20 (key revocation), " "0x28 (subkey revocation), and " "0x30 (certification revocation)." }, { "--digest", sig_digest, "The digest algorithm" }, { "--timestamp", sig_timestamp, "The signature's creation time. " TIMESTAMP_HELP " 0 means now. " "(RFC 4880, Section 5.2.3.4)" }, { "--key-expiration", sig_expiration, "The number of days until the associated key expires. To specify " "seconds, prefix the value with \"seconds=\". It is also possible " "to use 'y', 'm' and 'w' as simple multipliers. For instance, 2y " "means 2 years, etc. " "(RFC 4880, Section 5.2.3.6)" }, { "--cipher-algos", sig_int_list, "A comma separated list of the preferred cipher algorithms (identified by " "their number, see RFC 4880, Section 9). " "(RFC 4880, Section 5.2.3.7)" }, { "--digest-algos", sig_int_list, "A comma separated list of the preferred algorithms (identified by " "their number, see RFC 4880, Section 9). " "(RFC 4880, Section 5.2.3.8)" }, { "--compress-algos", sig_int_list, "A comma separated list of the preferred algorithms (identified by " "their number, see RFC 4880, Section 9)." "(RFC 4880, Section 5.2.3.9)" }, { "--expiration", sig_expiration, "The number of days until the signature expires. To specify seconds, " "prefix the value with \"seconds=\". It is also possible to use 'y', " "'m' and 'w' as simple multipliers. For instance, 2y means 2 years, " "etc. " "(RFC 4880, Section 5.2.3.10)" }, { "--exportable", sig_flag, "Mark this signature as exportable (1) or local (0). " "(RFC 4880, Section 5.2.3.11)" }, { "--revocable", sig_flag, "Mark this signature as revocable (1, revocations are ignored) " "or non-revocable (0). " "(RFC 4880, Section 5.2.3.12)" }, { "--trust-level", sig_trust_level, "Set the trust level. This takes two integer arguments (0-255): " "the trusted-introducer level and the degree of trust. " "(RFC 4880, Section 5.2.3.13.)" }, { "--trust-scope", sig_string_arg, "A regular expression that limits the scope of --trust-level. " "(RFC 4880, Section 5.2.3.14.)" }, { "--revocation-key", sig_revocation_key, "Specify a designated revoker. Takes two arguments: the class " "(normally 0x80 or 0xC0 (sensitive)) and the key id of the " "designatured revoker. May be given multiple times. " "(RFC 4880, Section 5.2.3.15)" }, { "--notation", sig_notation, "Add a human-readable notation of the form \"[!<]name=value\" where " "\"!\" means that the critical flag should be set and \"<\" means " "that VALUE is a file to read the data from. " "(RFC 4880, Section 5.2.3.16)" }, { "--notation-binary", sig_notation, "Add a binary notation of the form \"[!<]name=value\" where " "\"!\" means that the critical flag should be set and \"<\" means " "that VALUE is a file to read the data from. " "(RFC 4880, Section 5.2.3.16)" }, { "--key-server-preferences", sig_big_endian_arg, "Big-endian number encoding the key server preferences. " "(RFC 4880, Section 5.2.3.17)" }, { "--key-server", sig_string_arg, "The preferred key server. (RFC 4880, Section 5.2.3.18)" }, { "--primary-user-id", sig_flag, "Sets the primary user id flag. (RFC 4880, Section 5.2.3.19)" }, { "--policy-uri", sig_string_arg, "URI of a document that describes the issuer's signing policy. " "(RFC 4880, Section 5.2.3.20)" }, { "--key-flags", sig_big_endian_arg, "Big-endian number encoding the key flags. " "(RFC 4880, Section 5.2.3.21)" }, { "--signers-user-id", sig_string_arg, "The user id (as a string) responsible for the signing. " "(RFC 4880, Section 5.2.3.22)" }, { "--reason-for-revocation", sig_reason_for_revocation, "Takes two arguments: a reason for revocation code and a " "user-provided string. " "(RFC 4880, Section 5.2.3.23)" }, { "--features", sig_big_endian_arg, "Big-endian number encoding the feature flags. " "(RFC 4880, Section 5.2.3.24)" }, { "--signature-target", NULL, "Takes three arguments: the target signature's public key algorithm " " (as an integer), the hash algorithm (as an integer) and the hash " " (as a hexadecimal string). " "(RFC 4880, Section 5.2.3.25)" }, { "--embedded-signature", NULL, "An embedded signature. This must be immediately followed by a " "signature packet (created using --signature ...) or a filename " "containing the packet." "(RFC 4880, Section 5.2.3.26)" }, { "--hashed", NULL, "The following attributes will be placed in the hashed area of " "the signature. (This is the default and it reset at the end of" "each signature.)" }, { "--unhashed", NULL, "The following attributes will be placed in the unhashed area of " "the signature (and thus not integrity protected)." }, { "--corrupt", sig_corrupt, "Corrupt the signature." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --public-key $KEYID --user-id USERID \\\n" " --signature --class 0x10 --issuer $KEYID --issuer-keyid self \\\n" " | " GPG_NAME " --list-packets"} }; static int mksubpkt_callback (PKT_signature *sig, void *cookie) { struct siginfo *si = cookie; int i; if (si->key_expiration) { char buf[4]; buf[0] = (si->key_expiration >> 24) & 0xff; buf[1] = (si->key_expiration >> 16) & 0xff; buf[2] = (si->key_expiration >> 8) & 0xff; buf[3] = si->key_expiration & 0xff; build_sig_subpkt (sig, SIGSUBPKT_KEY_EXPIRE, buf, 4); } if (si->cipher_algorithms) build_sig_subpkt (sig, SIGSUBPKT_PREF_SYM, si->cipher_algorithms, si->cipher_algorithms_len); if (si->digest_algorithms) build_sig_subpkt (sig, SIGSUBPKT_PREF_HASH, si->digest_algorithms, si->digest_algorithms_len); if (si->compress_algorithms) build_sig_subpkt (sig, SIGSUBPKT_PREF_COMPR, si->compress_algorithms, si->compress_algorithms_len); if (si->exportable_set) { char buf = si->exportable; build_sig_subpkt (sig, SIGSUBPKT_EXPORTABLE, &buf, 1); } if (si->trust_level_set) build_sig_subpkt (sig, SIGSUBPKT_TRUST, si->trust_args, sizeof (si->trust_args)); if (si->trust_scope) build_sig_subpkt (sig, SIGSUBPKT_REGEXP, si->trust_scope, strlen (si->trust_scope)); for (i = 0; i < si->nrevocation_keys; i ++) { struct revocation_key *revkey = &si->revocation_key[i]; gpg_error_t err = keygen_add_revkey (sig, revkey); if (err) { u32 keyid[2]; keyid_from_fingerprint (revkey->fpr, 20, keyid); log_fatal ("adding revocation key %s: %s\n", keystr (keyid), gpg_strerror (err)); } } /* keygen_add_revkey sets revocable=0 so be sure to do this after adding the rev keys. */ if (si->revocable_set) { char buf = si->revocable; build_sig_subpkt (sig, SIGSUBPKT_REVOCABLE, &buf, 1); } keygen_add_notations (sig, si->notations); if (si->key_server_preferences) build_sig_subpkt (sig, SIGSUBPKT_KS_FLAGS, si->key_server_preferences, si->key_server_preferences_len); if (si->key_server) build_sig_subpkt (sig, SIGSUBPKT_PREF_KS, si->key_server, strlen (si->key_server)); if (si->primary_user_id_set) { char buf = si->primary_user_id; build_sig_subpkt (sig, SIGSUBPKT_PRIMARY_UID, &buf, 1); } if (si->policy_uri) build_sig_subpkt (sig, SIGSUBPKT_POLICY, si->policy_uri, strlen (si->policy_uri)); if (si->key_flags) build_sig_subpkt (sig, SIGSUBPKT_KEY_FLAGS, si->key_flags, si->key_flags_len); if (si->signers_user_id) build_sig_subpkt (sig, SIGSUBPKT_SIGNERS_UID, si->signers_user_id, strlen (si->signers_user_id)); if (si->reason_for_revocation) { int l = 1 + strlen (si->reason_for_revocation); char buf[l]; buf[0] = si->reason_for_revocation_code; memcpy (&buf[1], si->reason_for_revocation, l - 1); build_sig_subpkt (sig, SIGSUBPKT_REVOC_REASON, buf, l); } if (si->features) build_sig_subpkt (sig, SIGSUBPKT_FEATURES, si->features, si->features_len); return 0; } static int signature (const char *option, int argc, char *argv[], void *cookie) { gpg_error_t err; iobuf_t out = cookie; struct siginfo si; int processed; PKT_public_key *pk; PKT_signature *sig; PACKET pkt; u32 keyid_orig[2], keyid[2]; (void) option; memset (&si, 0, sizeof (si)); memset (&pkt, 0, sizeof (pkt)); processed = process_options (option, major_options, sig_options, &si, global_options, NULL, argc, argv); if (ncomponents) { int pkttype = components[ncomponents - 1].pkttype; if (pkttype == PKT_PUBLIC_KEY) { if (! si.class) /* Direct key sig. */ si.class = 0x1F; } else if (pkttype == PKT_PUBLIC_SUBKEY) { if (! si.sk) si.sk = components[ncomponents - 1].pkt.public_key; if (! si.class) /* Subkey binding sig. */ si.class = 0x18; } else if (pkttype == PKT_USER_ID) { if (! si.uid) si.uid = components[ncomponents - 1].pkt.user_id; if (! si.class) /* Certification of a user id and public key packet. */ si.class = 0x10; } } pk = NULL; if (! si.pk || ! si.issuer_pk) /* No primary key specified. Default to the first one that we find. */ { int i; for (i = 0; i < ncomponents; i ++) if (components[i].pkttype == PKT_PUBLIC_KEY) { pk = components[i].pkt.public_key; break; } } if (! si.pk) { if (! pk) log_fatal ("%s: no primary key given and no primary key available", "--pk"); si.pk = pk; } if (! si.issuer_pk) { if (! pk) log_fatal ("%s: no issuer key given and no primary key available", "--issuer"); si.issuer_pk = pk; } if (si.class == 0x18 || si.class == 0x19 || si.class == 0x28) /* Requires the primary key and a subkey. */ { if (! si.sk) log_fatal ("sig class 0x%x requires a subkey (--sk)\n", si.class); } else if (si.class == 0x10 || si.class == 0x11 || si.class == 0x12 || si.class == 0x13 || si.class == 0x30) /* Requires the primary key and a user id. */ { if (! si.uid) log_fatal ("sig class 0x%x requires a uid (--uid)\n", si.class); } else if (si.class == 0x1F || si.class == 0x20) /* Just requires the primary key. */ ; else log_fatal ("Unsupported signature class: 0x%x\n", si.class); sig = xmalloc_clear (sizeof (*sig)); /* Save SI.ISSUER_PK->KEYID. */ keyid_copy (keyid_orig, pk_keyid (si.issuer_pk)); if (si.issuer_keyid[0] || si.issuer_keyid[1]) keyid_copy (si.issuer_pk->keyid, si.issuer_keyid); else if (si.issuer_keyid_self) { PKT_public_key *pripk = primary_key(); if (! pripk) log_fatal ("--issuer-keyid self given, but no primary key available.\n"); keyid_copy (si.issuer_pk->keyid, pk_keyid (pripk)); } /* Changing the issuer's key id is fragile. Check to make sure make_keysig_packet didn't recompute the keyid. */ keyid_copy (keyid, si.issuer_pk->keyid); err = make_keysig_packet (&sig, si.pk, si.uid, si.sk, si.issuer_pk, si.class, si.digest_algo, si.timestamp, si.expiration, mksubpkt_callback, &si, NULL); log_assert (keyid_cmp (keyid, si.issuer_pk->keyid) == 0); if (err) log_fatal ("Generating signature: %s\n", gpg_strerror (err)); /* Restore SI.PK->KEYID. */ keyid_copy (si.issuer_pk->keyid, keyid_orig); if (si.corrupt) { /* Set the top 32-bits to 0xBAD0DEAD. */ int bits = gcry_mpi_get_nbits (sig->data[0]); gcry_mpi_t x = gcry_mpi_new (0); gcry_mpi_add_ui (x, x, 0xBAD0DEAD); gcry_mpi_lshift (x, x, bits > 32 ? bits - 32 : bits); gcry_mpi_clear_highbit (sig->data[0], bits > 32 ? bits - 32 : 0); gcry_mpi_add (sig->data[0], sig->data[0], x); gcry_mpi_release (x); } pkt.pkttype = PKT_SIGNATURE; pkt.pkt.signature = sig; err = build_packet (out, &pkt); if (err) log_fatal ("serializing public key packet: %s\n", gpg_strerror (err)); debug ("Wrote signature packet:\n"); dump_component (&pkt); xfree (sig); release_kbnode (si.issuer_kb); xfree (si.revocation_key); return processed; } struct sk_esk_info { /* The cipher used for encrypting the session key (when a session key is used). */ int cipher; /* The cipher used for encryping the SED packet. */ int sed_cipher; /* S2K related data. */ int hash; int mode; int mode_set; byte salt[8]; int salt_set; int iterations; /* If applying the S2K function to the passphrase is the session key or if it is the decryption key for the session key. */ int s2k_is_session_key; /* Generate a new, random session key. */ int new_session_key; /* The unencrypted session key. */ int session_key_len; char *session_key; char *password; }; static int sk_esk_cipher (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "integer|IDEA|3DES|CAST5|BLOWFISH|AES|AES192|AES256|CAMELLIA128|CAMELLIA192|CAMELLIA256"; int cipher; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (strcasecmp (argv[0], "IDEA") == 0) cipher = CIPHER_ALGO_IDEA; else if (strcasecmp (argv[0], "3DES") == 0) cipher = CIPHER_ALGO_3DES; else if (strcasecmp (argv[0], "CAST5") == 0) cipher = CIPHER_ALGO_CAST5; else if (strcasecmp (argv[0], "BLOWFISH") == 0) cipher = CIPHER_ALGO_BLOWFISH; else if (strcasecmp (argv[0], "AES") == 0) cipher = CIPHER_ALGO_AES; else if (strcasecmp (argv[0], "AES192") == 0) cipher = CIPHER_ALGO_AES192; else if (strcasecmp (argv[0], "TWOFISH") == 0) cipher = CIPHER_ALGO_TWOFISH; else if (strcasecmp (argv[0], "CAMELLIA128") == 0) cipher = CIPHER_ALGO_CAMELLIA128; else if (strcasecmp (argv[0], "CAMELLIA192") == 0) cipher = CIPHER_ALGO_CAMELLIA192; else if (strcasecmp (argv[0], "CAMELLIA256") == 0) cipher = CIPHER_ALGO_CAMELLIA256; else { char *tail; int v; errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || ! valid_cipher (v)) log_fatal ("Invalid or unsupported value. Usage: %s %s\n", option, usage); cipher = v; } if (strcmp (option, "--cipher") == 0) { if (si->cipher) log_fatal ("%s given multiple times.", option); si->cipher = cipher; } else if (strcmp (option, "--sed-cipher") == 0) { if (si->sed_cipher) log_fatal ("%s given multiple times.", option); si->sed_cipher = cipher; } return 1; } static int sk_esk_mode (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "integer|simple|salted|iterated"; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (si->mode) log_fatal ("%s given multiple times.", option); if (strcasecmp (argv[0], "simple") == 0) si->mode = 0; else if (strcasecmp (argv[0], "salted") == 0) si->mode = 1; else if (strcasecmp (argv[0], "iterated") == 0) si->mode = 3; else { char *tail; int v; errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || ! (v == 0 || v == 1 || v == 3)) log_fatal ("Invalid or unsupported value. Usage: %s %s\n", option, usage); si->mode = v; } si->mode_set = 1; return 1; } static int sk_esk_hash_algorithm (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "integer|MD5|SHA1|RMD160|SHA256|SHA384|SHA512|SHA224"; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (si->hash) log_fatal ("%s given multiple times.", option); if (strcasecmp (argv[0], "MD5") == 0) si->hash = DIGEST_ALGO_MD5; else if (strcasecmp (argv[0], "SHA1") == 0) si->hash = DIGEST_ALGO_SHA1; else if (strcasecmp (argv[0], "RMD160") == 0) si->hash = DIGEST_ALGO_RMD160; else if (strcasecmp (argv[0], "SHA256") == 0) si->hash = DIGEST_ALGO_SHA256; else if (strcasecmp (argv[0], "SHA384") == 0) si->hash = DIGEST_ALGO_SHA384; else if (strcasecmp (argv[0], "SHA512") == 0) si->hash = DIGEST_ALGO_SHA512; else if (strcasecmp (argv[0], "SHA224") == 0) si->hash = DIGEST_ALGO_SHA224; else { char *tail; int v; errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || ! (v == DIGEST_ALGO_MD5 || v == DIGEST_ALGO_SHA1 || v == DIGEST_ALGO_RMD160 || v == DIGEST_ALGO_SHA256 || v == DIGEST_ALGO_SHA384 || v == DIGEST_ALGO_SHA512 || v == DIGEST_ALGO_SHA224)) log_fatal ("Invalid or unsupported value. Usage: %s %s\n", option, usage); si->hash = v; } return 1; } static int sk_esk_salt (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "16-HEX-CHARACTERS"; char *p = argv[0]; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (si->salt_set) log_fatal ("%s given multiple times.", option); if (p[0] == '0' && p[1] == 'x') p += 2; if (strlen (p) != 16) log_fatal ("%s: Salt must be exactly 16 hexadecimal characters (have: %zd)\n", option, strlen (p)); if (hex2bin (p, si->salt, sizeof (si->salt)) == -1) log_fatal ("%s: Salt must only contain hexadecimal characters\n", option); si->salt_set = 1; return 1; } static int sk_esk_iterations (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "ITERATION-COUNT"; char *tail; int v; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || v < 0) log_fatal ("%s: Non-negative integer expected.\n", option); si->iterations = v; return 1; } static int sk_esk_session_key (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "HEX-CHARACTERS|auto|none"; char *p = argv[0]; struct session_key sk; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (si->session_key || si->s2k_is_session_key || si->new_session_key) log_fatal ("%s given multiple times.", option); if (strcasecmp (p, "none") == 0) { si->s2k_is_session_key = 1; return 1; } if (strcasecmp (p, "new") == 0) { si->new_session_key = 1; return 1; } if (strcasecmp (p, "auto") == 0) return 1; sk = parse_session_key (option, p, 0); if (si->session_key) log_fatal ("%s given multiple times.", option); if (sk.algo) si->sed_cipher = sk.algo; si->session_key_len = sk.keylen; si->session_key = sk.key; return 1; } static int sk_esk_password (const char *option, int argc, char *argv[], void *cookie) { struct sk_esk_info *si = cookie; char *usage = "PASSWORD"; if (argc == 0) log_fatal ("Usage: --sk-esk %s\n", usage); if (si->password) log_fatal ("%s given multiple times.", option); si->password = xstrdup (argv[0]); return 1; } static struct option sk_esk_options[] = { { "--cipher", sk_esk_cipher, "The encryption algorithm for encrypting the session key. " "One of IDEA, 3DES, CAST5, BLOWFISH, AES (default), AES192, " "AES256, TWOFISH, CAMELLIA128, CAMELLIA192, or CAMELLIA256." }, { "--sed-cipher", sk_esk_cipher, "The encryption algorithm for encrypting the SED packet. " "One of IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, " "AES256 (default), TWOFISH, CAMELLIA128, CAMELLIA192, or CAMELLIA256." }, { "--mode", sk_esk_mode, "The S2K mode. Either one of the strings \"simple\", \"salted\" " "or \"iterated\" or an integer." }, { "--hash", sk_esk_hash_algorithm, "The hash algorithm to used to derive the key. One of " "MD5, SHA1 (default), RMD160, SHA256, SHA384, SHA512, or SHA224." }, { "--salt", sk_esk_salt, "The S2K salt encoded as 16 hexadecimal characters. One needed " "if the S2K function is in salted or iterated mode." }, { "--iterations", sk_esk_iterations, "The iteration count. If not provided, a reasonable value is chosen. " "Note: due to the encoding scheme, not every value is valid. For " "convenience, the provided value will be rounded appropriately. " "Only needed if the S2K function is in iterated mode." }, { "--session-key", sk_esk_session_key, "The session key to be encrypted by the S2K function as a hexadecimal " "string. If this is \"new\", then a new session key is generated." "If this is \"auto\", then either the last session key is " "used, if the was none, one is generated. If this is \"none\", then " "the session key is the result of applying the S2K algorithms to the " "password. The session key may be prefaced with an integer and a colon " "to indicate the cipher to use for the SED packet (making --sed-cipher " "unnecessary and allowing the direct use of the result of " "\"" GPG_NAME " --show-session-key\")." }, { "", sk_esk_password, "The password." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --sk-esk foobar --encrypted \\\n" " --literal --value foo | " GPG_NAME " --list-packets" } }; static int sk_esk (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; gpg_error_t err; int processed; struct sk_esk_info si; DEK sesdek; DEK s2kdek; PKT_symkey_enc *ske; PACKET pkt; memset (&si, 0, sizeof (si)); processed = process_options (option, major_options, sk_esk_options, &si, global_options, NULL, argc, argv); if (! si.password) log_fatal ("%s: missing password. Usage: %s PASSWORD", option, option); /* Fill in defaults, if appropriate. */ if (! si.cipher) si.cipher = CIPHER_ALGO_AES; if (! si.sed_cipher) si.sed_cipher = CIPHER_ALGO_AES256; if (! si.hash) si.hash = DIGEST_ALGO_SHA1; if (! si.mode_set) /* Salted and iterated. */ si.mode = 3; if (si.mode != 0 && ! si.salt_set) /* Generate a salt. */ gcry_randomize (si.salt, 8, GCRY_STRONG_RANDOM); if (si.mode == 0) { if (si.iterations) log_info ("%s: --iterations provided, but not used for mode=0\n", option); si.iterations = 0; } else if (! si.iterations) si.iterations = 10000; memset (&sesdek, 0, sizeof (sesdek)); /* The session key is used to encrypt the SED packet. */ sesdek.algo = si.sed_cipher; if (si.session_key) /* Copy the unencrypted session key into SESDEK. */ { sesdek.keylen = openpgp_cipher_get_algo_keylen (sesdek.algo); if (sesdek.keylen != si.session_key_len) log_fatal ("%s: Cipher algorithm requires a %d byte session key, but provided session key is %d bytes.", option, sesdek.keylen, si.session_key_len); log_assert (sesdek.keylen <= sizeof (sesdek.key)); memcpy (sesdek.key, si.session_key, sesdek.keylen); } else if (! si.s2k_is_session_key || si.new_session_key) /* We need a session key, but one wasn't provided. Generate it. */ make_session_key (&sesdek); /* The encrypted session key needs 1 + SESDEK.KEYLEN bytes of space. */ ske = xmalloc_clear (sizeof (*ske) + sesdek.keylen); ske->version = 4; ske->cipher_algo = si.cipher; ske->s2k.mode = si.mode; ske->s2k.hash_algo = si.hash; log_assert (sizeof (si.salt) == sizeof (ske->s2k.salt)); memcpy (ske->s2k.salt, si.salt, sizeof (ske->s2k.salt)); if (! si.s2k_is_session_key) /* 0 means get the default. */ ske->s2k.count = encode_s2k_iterations (si.iterations); /* Derive the symmetric key that is either the session key or the key used to encrypt the session key. */ memset (&s2kdek, 0, sizeof (s2kdek)); s2kdek.algo = si.cipher; s2kdek.keylen = openpgp_cipher_get_algo_keylen (s2kdek.algo); err = gcry_kdf_derive (si.password, strlen (si.password), ske->s2k.mode == 3 ? GCRY_KDF_ITERSALTED_S2K : ske->s2k.mode == 1 ? GCRY_KDF_SALTED_S2K : GCRY_KDF_SIMPLE_S2K, ske->s2k.hash_algo, ske->s2k.salt, 8, S2K_DECODE_COUNT (ske->s2k.count), /* The size of the desired key and its buffer. */ s2kdek.keylen, s2kdek.key); if (err) log_fatal ("gcry_kdf_derive failed: %s", gpg_strerror (err)); if (si.s2k_is_session_key) { ske->seskeylen = 0; session_key = s2kdek; } else /* Encrypt the session key using the s2k specifier. */ { DEK *sesdekp = &sesdek; /* Now encrypt the session key (or rather, the algorithm used to encrypt the SED plus the session key) using ENCKEY. */ ske->seskeylen = 1 + sesdek.keylen; encrypt_seskey (&s2kdek, &sesdekp, ske->seskey); /* Save the session key for later. */ session_key = sesdek; } pkt.pkttype = PKT_SYMKEY_ENC; pkt.pkt.symkey_enc = ske; err = build_packet (out, &pkt); if (err) log_fatal ("Serializing sym-key encrypted packet: %s\n", gpg_strerror (err)); debug ("Wrote sym-key encrypted packet:\n"); dump_component (&pkt); xfree (si.session_key); xfree (si.password); xfree (ske); return processed; } struct pk_esk_info { int session_key_set; int new_session_key; int sed_cipher; int session_key_len; char *session_key; int throw_keyid; char *keyid; }; static int pk_esk_session_key (const char *option, int argc, char *argv[], void *cookie) { struct pk_esk_info *pi = cookie; char *usage = "HEX-CHARACTERS|auto|none"; char *p = argv[0]; struct session_key sk; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (pi->session_key_set) log_fatal ("%s given multiple times.", option); pi->session_key_set = 1; if (strcasecmp (p, "new") == 0) { pi->new_session_key = 1; return 1; } if (strcasecmp (p, "auto") == 0) return 1; sk = parse_session_key (option, p, 0); if (pi->session_key) log_fatal ("%s given multiple times.", option); if (sk.algo) pi->sed_cipher = sk.algo; pi->session_key_len = sk.keylen; pi->session_key = sk.key; return 1; } static int pk_esk_throw_keyid (const char *option, int argc, char *argv[], void *cookie) { struct pk_esk_info *pi = cookie; (void) option; (void) argc; (void) argv; pi->throw_keyid = 1; return 0; } static int pk_esk_keyid (const char *option, int argc, char *argv[], void *cookie) { struct pk_esk_info *pi = cookie; char *usage = "KEYID"; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (pi->keyid) log_fatal ("Multiple key ids given, but only one is allowed."); pi->keyid = xstrdup (argv[0]); return 1; } static struct option pk_esk_options[] = { { "--session-key", pk_esk_session_key, "The session key to be encrypted by the S2K function as a hexadecimal " "string. If this is not given or is \"auto\", then the current " "session key is used. If there is no session key or this is \"new\", " "then a new session key is generated. The session key may be " "prefaced with an integer and a colon to indicate the cipher to use " "for the SED packet (making --sed-cipher unnecessary and allowing the " "direct use of the result of \"" GPG_NAME " --show-session-key\")." }, { "--throw-keyid", pk_esk_throw_keyid, "Throw the keyid." }, { "", pk_esk_keyid, "The key id." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --pk-esk $KEYID --encrypted --literal --value foo \\\n" " | " GPG_NAME " --list-packets"} }; static int pk_esk (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; gpg_error_t err; int processed; struct pk_esk_info pi; PKT_public_key pk; memset (&pi, 0, sizeof (pi)); processed = process_options (option, major_options, pk_esk_options, &pi, global_options, NULL, argc, argv); if (! pi.keyid) log_fatal ("%s: missing keyid. Usage: %s KEYID", option, option); memset (&pk, 0, sizeof (pk)); pk.req_usage = PUBKEY_USAGE_ENC; err = get_pubkey_byname (NULL, NULL, &pk, pi.keyid, NULL, NULL, 1, 1); if (err) log_fatal ("%s: looking up key %s: %s\n", option, pi.keyid, gpg_strerror (err)); if (pi.sed_cipher) /* Have a session key. */ { session_key.algo = pi.sed_cipher; session_key.keylen = pi.session_key_len; log_assert (session_key.keylen <= sizeof (session_key.key)); memcpy (session_key.key, pi.session_key, session_key.keylen); } if (pi.new_session_key || ! session_key.algo) { if (! pi.new_session_key) /* Default to AES256. */ session_key.algo = CIPHER_ALGO_AES256; make_session_key (&session_key); } err = write_pubkey_enc (&pk, pi.throw_keyid, &session_key, out); if (err) log_fatal ("%s: writing pk_esk packet for %s: %s\n", option, pi.keyid, gpg_strerror (err)); debug ("Wrote pk_esk packet for %s\n", pi.keyid); xfree (pi.keyid); xfree (pi.session_key); return processed; } struct encinfo { int saw_session_key; }; static int encrypted_session_key (const char *option, int argc, char *argv[], void *cookie) { struct encinfo *ei = cookie; char *usage = "HEX-CHARACTERS|auto"; char *p = argv[0]; struct session_key sk; if (argc == 0) log_fatal ("Usage: %s %s\n", option, usage); if (ei->saw_session_key) log_fatal ("%s given multiple times.", option); ei->saw_session_key = 1; if (strcasecmp (p, "auto") == 0) return 1; sk = parse_session_key (option, p, 1); session_key.algo = sk.algo; log_assert (sk.keylen <= sizeof (session_key.key)); memcpy (session_key.key, sk.key, sk.keylen); xfree (sk.key); return 1; } static struct option encrypted_options[] = { { "--session-key", encrypted_session_key, "The session key to be encrypted by the S2K function as a hexadecimal " "string. If this is not given or is \"auto\", then the last session key " "is used. If there was none, then an error is raised. The session key " "must be prefaced with an integer and a colon to indicate the cipher " "to use (this is format used by \"" GPG_NAME " --show-session-key\")." }, { NULL, NULL, "After creating the packet, this command clears the current " "session key.\n\n" "Example: nested encryption packets:\n\n" " $ gpgcompose --sk-esk foo --encrypted-mdc \\\n" " --sk-esk bar --encrypted-mdc \\\n" " --literal --value 123 --encrypted-pop --encrypted-pop | " GPG_NAME" -d" } }; static int encrypted (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; int processed; struct encinfo ei; PKT_encrypted e; cipher_filter_context_t *cfx; memset (&ei, 0, sizeof (ei)); processed = process_options (option, major_options, encrypted_options, &ei, global_options, NULL, argc, argv); if (! session_key.algo) log_fatal ("%s: no session key configured.\n", option); memset (&e, 0, sizeof (e)); /* We only need to set E->LEN, E->EXTRALEN (if E->LEN is not 0), and E->NEW_CTB. */ e.len = 0; e.new_ctb = 1; /* Register the cipher filter. */ cfx = xmalloc_clear (sizeof (*cfx)); /* Copy the session key. */ cfx->dek = xmalloc (sizeof (*cfx->dek)); *cfx->dek = session_key; if (do_debug) { char buf[2 * session_key.keylen + 1]; debug ("session key: algo: %d; keylen: %d; key: %s\n", session_key.algo, session_key.keylen, bin2hex (session_key.key, session_key.keylen, buf)); } if (strcmp (option, "--encrypted-mdc") == 0) cfx->dek->use_mdc = 1; else if (strcmp (option, "--encrypted") == 0) cfx->dek->use_mdc = 0; else log_fatal ("%s: option not handled by this function!\n", option); cfx->datalen = 0; filter_push (out, cipher_filter, cfx, PKT_ENCRYPTED, cfx->datalen == 0); debug ("Wrote encrypted packet:\n"); /* Clear the current session key. */ memset (&session_key, 0, sizeof (session_key)); return processed; } static int encrypted_pop (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; (void) argc; (void) argv; if (strcmp (option, "--encrypted-pop") == 0) filter_pop (out, PKT_ENCRYPTED); else if (strcmp (option, "--encrypted-mdc-pop") == 0) filter_pop (out, PKT_ENCRYPTED_MDC); else log_fatal ("%s: option not handled by this function!\n", option); debug ("Popped encryption container.\n"); return 0; } struct data { int file; union { char *data; char *filename; }; struct data *next; }; /* This must be the first member of the struct to be able to use add_value! */ struct datahead { struct data *head; struct data **last_next; }; static int add_value (const char *option, int argc, char *argv[], void *cookie) { struct datahead *dh = cookie; struct data *d = xmalloc_clear (sizeof (struct data)); d->file = strcmp ("--file", option) == 0; if (! d->file) log_assert (strcmp ("--value", option) == 0); if (argc == 0) { if (d->file) log_fatal ("Usage: %s FILENAME\n", option); else log_fatal ("Usage: %s STRING\n", option); } if (! dh->last_next) /* First time through. Initialize DH->LAST_NEXT. */ { log_assert (! dh->head); dh->last_next = &dh->head; } if (d->file) d->filename = argv[0]; else d->data = argv[0]; /* Append it. */ *dh->last_next = d; dh->last_next = &d->next; return 1; } struct litinfo { /* This must be the first element for add_value to work! */ struct datahead data; int timestamp_set; u32 timestamp; char mode; int partial_body_length_encoding; char *name; }; static int literal_timestamp (const char *option, int argc, char *argv[], void *cookie) { struct litinfo *li = cookie; char *tail = NULL; if (argc == 0) log_fatal ("Usage: %s TIMESTAMP\n", option); errno = 0; li->timestamp = parse_timestamp (argv[0], &tail); if (errno || (tail && *tail)) log_fatal ("Invalid value passed to %s (%s)\n", option, argv[0]); li->timestamp_set = 1; return 1; } static int literal_mode (const char *option, int argc, char *argv[], void *cookie) { struct litinfo *li = cookie; if (argc == 0 || ! (strcmp (argv[0], "b") == 0 || strcmp (argv[0], "t") == 0 || strcmp (argv[0], "u") == 0)) log_fatal ("Usage: %s [btu]\n", option); li->mode = argv[0][0]; return 1; } static int literal_partial_body_length (const char *option, int argc, char *argv[], void *cookie) { struct litinfo *li = cookie; char *tail; int v; int range[2] = {0, 1}; if (argc <= 1) log_fatal ("Usage: %s [0|1]\n", option); errno = 0; v = strtol (argv[0], &tail, 0); if (errno || (tail && *tail) || !(range[0] <= v && v <= range[1])) log_fatal ("Invalid value passed to %s (%s). Expected %d-%d\n", option, argv[0], range[0], range[1]); li->partial_body_length_encoding = v; return 1; } static int literal_name (const char *option, int argc, char *argv[], void *cookie) { struct litinfo *li = cookie; if (argc <= 1) log_fatal ("Usage: %s NAME\n", option); if (strlen (argv[0]) > 255) log_fatal ("%s: name is too long (%zd > 255 characters).\n", option, strlen (argv[0])); li->name = argv[0]; return 1; } static struct option literal_options[] = { { "--value", add_value, "A string to store in the literal packet." }, { "--file", add_value, "A file to copy into the literal packet." }, { "--timestamp", literal_timestamp, "The literal packet's time stamp. This defaults to the current time." }, { "--mode", literal_mode, "The content's mode (normally 'b' (default), 't' or 'u')." }, { "--partial-body-length", literal_partial_body_length, "Force partial body length encoding." }, { "--name", literal_name, "The literal's name." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --literal --value foobar | " GPG_NAME " -d"} }; static int literal (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; gpg_error_t err; int processed; struct litinfo li; PKT_plaintext *pt; PACKET pkt; struct data *data; memset (&li, 0, sizeof (li)); processed = process_options (option, major_options, literal_options, &li, global_options, NULL, argc, argv); if (! li.data.head) log_fatal ("%s: no data provided (use --value or --file)", option); pt = xmalloc_clear (sizeof (*pt) + (li.name ? strlen (li.name) : 0)); pt->new_ctb = 1; if (li.timestamp_set) pt->timestamp = li.timestamp; else /* Default to the current time. */ pt->timestamp = make_timestamp (); pt->mode = li.mode; if (! pt->mode) /* Default to binary. */ pt->mode = 'b'; if (li.name) { strcpy (pt->name, li.name); pt->namelen = strlen (pt->name); } pkt.pkttype = PKT_PLAINTEXT; pkt.pkt.plaintext = pt; if (! li.partial_body_length_encoding) /* Compute the amount of data. */ { pt->len = 0; for (data = li.data.head; data; data = data->next) { if (data->file) { iobuf_t in; int overflow; off_t off; in = iobuf_open (data->filename); if (! in) /* An error opening the file. We do error handling below so just break here. */ { pt->len = 0; break; } off = iobuf_get_filelength (in, &overflow); iobuf_close (in); if (overflow || off == 0) /* Length is unknown or there was an error (unfortunately, iobuf_get_filelength doesn't distinguish between 0 length files and an error!). Fall back to partial body mode. */ { pt->len = 0; break; } pt->len += off; } else pt->len += strlen (data->data); } } err = build_packet (out, &pkt); if (err) log_fatal ("Serializing literal packet: %s\n", gpg_strerror (err)); /* Write out the data. */ for (data = li.data.head; data; data = data->next) { if (data->file) { iobuf_t in; errno = 0; in = iobuf_open (data->filename); if (! in) log_fatal ("Opening '%s': %s\n", data->filename, errno ? strerror (errno): "unknown error"); iobuf_copy (out, in); if (iobuf_error (in)) log_fatal ("Reading from %s: %s\n", data->filename, gpg_strerror (iobuf_error (in))); if (iobuf_error (out)) log_fatal ("Writing literal data from %s: %s\n", data->filename, gpg_strerror (iobuf_error (out))); iobuf_close (in); } else { err = iobuf_write (out, data->data, strlen (data->data)); if (err) log_fatal ("Writing literal data: %s\n", gpg_strerror (err)); } } if (! pt->len) { /* Disable partial body length mode. */ log_assert (pt->new_ctb == 1); iobuf_set_partial_body_length_mode (out, 0); } debug ("Wrote literal packet:\n"); dump_component (&pkt); while (li.data.head) { data = li.data.head->next; xfree (li.data.head); li.data.head = data; } xfree (pt); return processed; } static int copy_file (const char *option, int argc, char *argv[], void *cookie) { char **filep = cookie; if (argc == 0) log_fatal ("Usage: %s FILENAME\n", option); *filep = argv[0]; return 1; } static struct option copy_options[] = { { "", copy_file, "Copy the specified file to stdout." }, { NULL, NULL, "Example:\n\n" " $ gpgcompose --copy /etc/hostname\n\n" "This is particularly useful when combined with gpgsplit." } }; static int copy (const char *option, int argc, char *argv[], void *cookie) { iobuf_t out = cookie; char *file = NULL; iobuf_t in; int processed; processed = process_options (option, major_options, copy_options, &file, global_options, NULL, argc, argv); if (! file) log_fatal ("Usage: %s FILE\n", option); errno = 0; in = iobuf_open (file); if (! in) log_fatal ("Error opening %s: %s.\n", file, errno ? strerror (errno): "unknown error"); iobuf_copy (out, in); if (iobuf_error (out)) log_fatal ("Copying data to destination: %s\n", gpg_strerror (iobuf_error (out))); if (iobuf_error (in)) log_fatal ("Reading data from %s: %s\n", argv[0], gpg_strerror (iobuf_error (in))); iobuf_close (in); return processed; } int main (int argc, char *argv[]) { const char *filename = "-"; iobuf_t out; int preprocessed = 1; int processed; ctrl_t ctrl; opt.ignore_time_conflict = 1; /* Allow notations in the IETF space, for instance. */ opt.expert = 1; ctrl = xcalloc (1, sizeof *ctrl); keydb_add_resource ("pubring" EXTSEP_S GPGEXT_GPG, KEYDB_RESOURCE_FLAG_DEFAULT); if (argc == 1) /* Nothing to do. */ return 0; if (strcmp (argv[1], "--output") == 0 || strcmp (argv[1], "-o") == 0) { filename = argv[2]; log_info ("Writing to %s\n", filename); preprocessed += 2; } out = iobuf_create (filename, 0); if (! out) log_fatal ("Failed to open stdout for writing\n"); processed = process_options (NULL, NULL, major_options, out, global_options, NULL, argc - preprocessed, &argv[preprocessed]); if (processed != argc - preprocessed) log_fatal ("Didn't process %d options.\n", argc - preprocessed - processed); iobuf_close (out); return 0; } /* Stubs duplicated from gpg.c. */ int g10_errors_seen = 0; /* Note: This function is used by signal handlers!. */ static void emergency_cleanup (void) { gcry_control (GCRYCTL_TERM_SECMEM ); } void g10_exit( int rc ) { gcry_control (GCRYCTL_UPDATE_RANDOM_SEED_FILE); emergency_cleanup (); rc = rc? rc : log_get_errorcount(0)? 2 : g10_errors_seen? 1 : 0; exit (rc); } void keyedit_menu (ctrl_t ctrl, const char *username, strlist_t locusr, strlist_t commands, int quiet, int seckey_check) { (void) ctrl; (void) username; (void) locusr; (void) commands; (void) quiet; (void) seckey_check; } void show_basic_key_info (KBNODE keyblock) { (void) keyblock; }