+++ /dev/null
-/* -*-c-*-
- *
- * $Id$
- *
- * Command-line encryption tool
- *
- * (c) 2004 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-/*----- Header files ------------------------------------------------------*/
-
-#define _FILE_OFFSET_BITS 64
-
-#include "config.h"
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <mLib/base64.h>
-#include <mLib/dstr.h>
-#include <mLib/mdwopt.h>
-#include <mLib/quis.h>
-#include <mLib/report.h>
-#include <mLib/sub.h>
-
-#include "buf.h"
-#include "rand.h"
-#include "noise.h"
-#include "mprand.h"
-#include "key.h"
-#include "cc.h"
-
-#include "ectab.h"
-#include "ptab.h"
-
-/*----- Static variables --------------------------------------------------*/
-
-static const char *keyring = "keyring";
-
-/*----- Data format -------------------------------------------------------*/
-
-/* --- Overview --- *
- *
- * The encrypted message is divided into chunks, each preceded by a two-octet
- * length. The chunks don't need to be large -- the idea is that we can
- * stream the chunks in and out.
- *
- * The first chunk is a header. It contains the decryption key-id, and maybe
- * the verification key-id if the message is signed.
- *
- * Next comes the key-encapsulation chunk. This is decrypted in some
- * KEM-specific way to yield a secret hash. The hash is expanded using an
- * MGF (or similar) to make a symmetric encryption and MAC key.
- *
- * If the message is signed, there comes a signature chunk. The signature is
- * on the header and key-encapsulation chunks, and further output of the MGF.
- * This means that the recipient can modify the message and still have a
- * valid signature, so it's not useful for proving things to other people;
- * but it also means that the recipient knows that the message is from
- * someone who knows the hash, which limits the possiblities to (a) whoever
- * encrypted the message (good!) and (b) whoever knows the recipient's
- * private key.
- *
- * Then come message chunks. Each one begins with a MAC over an implicit
- * sequence number and the ciphertext. The final chunk's ciphertext is
- * empty; no other chunk is empty. Thus can the correct end-of-file be
- * discerned.
- */
-
-/*----- Chunk I/O ---------------------------------------------------------*/
-
-static void chunk_write(enc *e, buf *b)
-{
- octet l[2];
- size_t n = BLEN(b);
- assert(n <= MASK16);
- STORE16(l, n);
- if (e->ops->write(e, l, 2) ||
- e->ops->write(e, BBASE(b), BLEN(b)))
- die(EXIT_FAILURE, "error writing output: %s", strerror(errno));
-}
-
-static void chunk_read(enc *e, dstr *d, buf *b)
-{
- octet l[2];
- size_t n;
-
- dstr_reset(d);
- errno = 0;
- if (e->ops->read(e, l, 2) != 2)
- goto err;
- n = LOAD16(l);
- dstr_ensure(d, n);
- if (e->ops->read(e, d->buf, n) != n)
- goto err;
- d->len = n;
- buf_init(b, d->buf, d->len);
- return;
-
-err:
- if (!errno) die(EXIT_FAILURE, "unexpected end-of-file on input");
- else die(EXIT_FAILURE, "error reading input: %s", strerror(errno));
-}
-
-/*----- Encryption --------------------------------------------------------*/
-
-static int encrypt(int argc, char *argv[])
-{
- const char *fn, *of = 0, *kn = "ccrypt", *skn = 0;
- FILE *ofp = 0;
- FILE *fp = 0;
- const char *ef = "binary";
- fprogress ff;
- const char *err;
- int i;
- int en;
- size_t n, chsz;
- dstr d = DSTR_INIT;
- octet *tag, *ct;
- buf b;
- size_t seq;
- char bb[65536];
- unsigned f = 0;
- key_file kf;
- key *k;
- key *sk = 0;
- kem *km;
- sig *s = 0;
- gcipher *cx, *c;
- gmac *m;
- ghash *h;
- const encops *eo;
- enc *e;
-
-#define f_bogus 1u
-#define f_nocheck 2u
-#define f_progress 4u
-
- for (;;) {
- static const struct option opt[] = {
- { "key", OPTF_ARGREQ, 0, 'k' },
- { "sign-key", OPTF_ARGREQ, 0, 's' },
- { "armour", 0, 0, 'a' },
- { "armor", 0, 0, 'a' },
- { "format", OPTF_ARGREQ, 0, 'f' },
- { "output", OPTF_ARGREQ, 0, 'o' },
- { "progress", 0, 0, 'p' },
- { "nocheck", 0, 0, 'C' },
- { 0, 0, 0, 0 }
- };
- i = mdwopt(argc, argv, "k:s:af:o:pC", opt, 0, 0, 0);
- if (i < 0) break;
- switch (i) {
- case 'k': kn = optarg; break;
- case 's': skn = optarg; break;
- case 'a': ef = "pem"; break;
- case 'f': ef = optarg; break;
- case 'o': of = optarg; break;
- case 'p': f |= f_progress; break;
- case 'C': f |= f_nocheck; break;
- default: f |= f_bogus; break;
- }
- }
- if (argc - optind > 1 || (f & f_bogus))
- die(EXIT_FAILURE, "Usage: encrypt [-OPTIONS] [FILE]");
-
- if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0))
- die(EXIT_FAILURE, "can't open keyring `%s'", keyring);
- if ((k = key_bytag(&kf, kn)) == 0)
- die(EXIT_FAILURE, "key `%s' not found", kn);
- if (skn && (sk = key_bytag(&kf, skn)) == 0)
- die(EXIT_FAILURE, "key `%s' not found", skn);
-
- if ((eo = getenc(ef)) == 0)
- die(EXIT_FAILURE, "encoding `%s' not found", ef);
-
- fn = optind < argc ? argv[optind++] : "-";
- if (strcmp(fn, "-") == 0)
- fp = stdin;
- else if ((fp = fopen(fn, "rb")) == 0) {
- die(EXIT_FAILURE, "couldn't open file `%s': %s",
- fn, strerror(errno));
- }
-
- if (!of || strcmp(of, "-") == 0)
- ofp = stdout;
- else if ((ofp = fopen(of, eo->wmode)) == 0) {
- die(EXIT_FAILURE, "couldn't open file `%s' for output: %s",
- ofp, strerror(errno));
- }
-
- dstr_reset(&d);
- key_fulltag(k, &d);
- e = initenc(eo, ofp, "CATCRYPT ENCRYPTED MESSAGE");
- km = getkem(k, "cckem", 0);
- if (!(f & f_nocheck) && (err = km->ops->check(km)) != 0)
- moan("key %s fails check: %s", d.buf, err);
- if (sk) {
- dstr_reset(&d);
- key_fulltag(sk, &d);
- s = getsig(sk, "ccsig", 1);
- if ((err = s->ops->check(s)) != 0)
- moan("key %s fails check: %s", d.buf, err);
- }
-
- /* --- Build the header chunk --- */
-
- dstr_reset(&d);
- dstr_ensure(&d, 256);
- buf_init(&b, d.buf, 256);
- buf_putu32(&b, k->id);
- if (sk) buf_putu32(&b, sk->id);
- assert(BOK(&b));
- if (s) GH_HASHBUF16(s->h, BBASE(&b), BLEN(&b));
- chunk_write(e, &b);
-
- /* --- Build the KEM chunk --- */
-
- dstr_reset(&d);
- if (setupkem(km, &d, &cx, &c, &m))
- die(EXIT_FAILURE, "failed to encapsulate key");
- buf_init(&b, d.buf, d.len);
- BSTEP(&b, d.len);
- if (s) GH_HASHBUF16(s->h, BBASE(&b), BLEN(&b));
- chunk_write(e, &b);
-
- /* --- Write the signature chunk --- */
-
- if (s) {
- GC_ENCRYPT(cx, 0, bb, 1024);
- GH_HASH(s->h, bb, 1024);
- dstr_reset(&d);
- if ((en = s->ops->doit(s, &d)) != 0)
- die(EXIT_FAILURE, "error creating signature: %s", key_strerror(en));
- buf_init(&b, d.buf, d.len);
- BSTEP(&b, d.len);
- chunk_write(e, &b);
- }
-
- /* --- Now do the main crypto --- */
-
- if (f & f_progress) {
- if (fprogress_init(&ff, fn, fp)) {
- die(EXIT_FAILURE, "failed to initialize progress display: %s",
- strerror(errno));
- }
- }
-
- assert(GC_CLASS(c)->blksz <= sizeof(bb));
- dstr_ensure(&d, sizeof(bb) + GM_CLASS(m)->hashsz);
- seq = 0;
- chsz = MASK16 - GM_CLASS(m)->hashsz;
- for (;;) {
- h = GM_INIT(m);
- GH_HASHU32(h, seq);
- seq++;
- if (GC_CLASS(c)->blksz) {
- GC_ENCRYPT(cx, 0, bb, GC_CLASS(c)->blksz);
- GC_SETIV(c, bb);
- }
- n = fread(bb, 1, chsz, fp);
- if (!n) break;
- if (f & f_progress) fprogress_update(&ff, n);
- buf_init(&b, d.buf, d.sz);
- tag = buf_get(&b, GM_CLASS(m)->hashsz);
- ct = buf_get(&b, n);
- assert(tag); assert(ct);
- GC_ENCRYPT(c, bb, ct, n);
- GH_HASH(h, ct, n);
- GH_DONE(h, tag);
- GH_DESTROY(h);
- chunk_write(e, &b);
- }
-
- /* --- Final terminator packet --- */
-
- buf_init(&b, d.buf, d.sz);
- tag = buf_get(&b, GM_CLASS(m)->hashsz);
- assert(tag);
- GH_DONE(h, tag);
- GH_DESTROY(h);
- chunk_write(e, &b);
-
- /* --- All done --- */
-
- if (f & f_progress) fprogress_done(&ff);
- e->ops->encdone(e);
- GM_DESTROY(m);
- GC_DESTROY(c);
- GC_DESTROY(cx);
- freeenc(e);
- if (s) freesig(s);
- freekem(km);
- if (fp != stdin) fclose(fp);
- if (of) fclose(ofp);
- key_close(&kf);
- dstr_destroy(&d);
- return (0);
-
-#undef f_bogus
-#undef f_nocheck
-#undef f_progress
-}
-
-/*---- Decryption ---------------------------------------------------------*/
-
-static int decrypt(int argc, char *argv[])
-{
- const char *fn, *of = 0;
- FILE *ofp = 0, *rfp = 0;
- FILE *fp = 0;
- const char *ef = "binary";
- fprogress ff;
- int i;
- size_t n;
- dstr d = DSTR_INIT;
- buf b;
- key_file kf;
- size_t seq;
- uint32 id;
- key *k;
- key *sk = 0;
- kem *km;
- sig *s = 0;
- gcipher *cx;
- gcipher *c;
- ghash *h;
- gmac *m;
- octet *tag;
- unsigned f = 0;
- const encops *eo;
- const char *err;
- int verb = 1;
- enc *e;
-
-#define f_bogus 1u
-#define f_buffer 2u
-#define f_nocheck 4u
-#define f_progress 8u
-
- for (;;) {
- static const struct option opt[] = {
- { "armour", 0, 0, 'a' },
- { "armor", 0, 0, 'a' },
- { "buffer", 0, 0, 'b' },
- { "verbose", 0, 0, 'v' },
- { "quiet", 0, 0, 'q' },
- { "nocheck", 0, 0, 'C' },
- { "format", OPTF_ARGREQ, 0, 'f' },
- { "output", OPTF_ARGREQ, 0, 'o' },
- { "progress", 0, 0, 'p' },
- { 0, 0, 0, 0 }
- };
- i = mdwopt(argc, argv, "abf:o:pqvC", opt, 0, 0, 0);
- if (i < 0) break;
- switch (i) {
- case 'a': ef = "pem"; break;
- case 'b': f |= f_buffer; break;
- case 'v': verb++; break;
- case 'q': if (verb) verb--; break;
- case 'C': f |= f_nocheck; break;
- case 'f': ef = optarg; break;
- case 'o': of = optarg; break;
- case 'p': f |= f_progress; break;
- default: f |= f_bogus; break;
- }
- }
- if (argc - optind > 1 || (f & f_bogus))
- die(EXIT_FAILURE, "Usage: decrypt [-OPTIONS] [FILE]");
-
- if ((eo = getenc(ef)) == 0)
- die(EXIT_FAILURE, "encoding `%s' not found", ef);
-
- fn = optind < argc ? argv[optind++] : "-";
- if (strcmp(fn, "-") == 0)
- fp = stdin;
- else if ((fp = fopen(fn, eo->rmode)) == 0) {
- die(EXIT_FAILURE, "couldn't open file `%s': %s",
- fn, strerror(errno));
- }
-
- if (key_open(&kf, keyring, KOPEN_READ, key_moan, 0))
- die(EXIT_FAILURE, "can't open keyring `%s'", keyring);
-
- e = initdec(eo, fp, checkbdry, "CATCRYPT ENCRYPTED MESSAGE");
-
- if (f & f_progress) {
- if (fprogress_init(&ff, fn, fp)) {
- die(EXIT_FAILURE, "failed to initialize progress display: %s",
- strerror(errno));
- }
- }
-
- /* --- Read the header chunk --- */
-
- chunk_read(e, &d, &b);
- if (f & f_progress)
- fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw);
- if (buf_getu32(&b, &id)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL malformed header: missing keyid\n");
- exit(EXIT_FAILURE);
- }
- if ((k = key_byid(&kf, id)) == 0) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id);
- exit(EXIT_FAILURE);
- }
- if (BLEFT(&b)) {
- if (buf_getu32(&b, &id)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL malformed header: missing signature keyid\n");
- exit(EXIT_FAILURE);
- }
- if ((sk = key_byid(&kf, id)) == 0) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL key id %08lx not found\n", (unsigned long)id);
- exit(EXIT_FAILURE);
- }
- }
- if (BLEFT(&b)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL malformed header: junk at end\n");
- exit(EXIT_FAILURE);
- }
- if (sk) {
- s = getsig(sk, "ccsig", 0);
- if (!(f & f_nocheck) && verb && (err = s->ops->check(s)) != 0) {
- dstr_reset(&d);
- key_fulltag(sk, &d);
- printf("WARN verification key %s fails check: %s\n", d.buf, err);
- }
- GH_HASHBUF16(s->h, BBASE(&b), BSZ(&b));
- }
-
- /* --- Find the key --- */
-
- km = getkem(k, "cckem", 1);
-
- /* --- Read the KEM chunk --- */
-
- chunk_read(e, &d, &b);
- if (f & f_progress)
- fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw);
- if (setupkem(km, &d, &cx, &c, &m)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL failed to decapsulate key\n");
- exit(EXIT_FAILURE);
- }
- if (s) GH_HASHBUF16(s->h, d.buf, d.len);
-
- /* --- Verify the signature, if there is one --- */
-
- if (sk) {
- dstr_reset(&d);
- dstr_ensure(&d, 1024);
- GC_ENCRYPT(cx, 0, d.buf, 1024);
- GH_HASH(s->h, d.buf, 1024);
- chunk_read(e, &d, &b);
- if (f & f_progress)
- fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw);
- if (s->ops->doit(s, &d)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL signature verification failed\n");
- exit(EXIT_FAILURE);
- }
- if (verb) {
- dstr_reset(&d);
- key_fulltag(sk, &d);
- if (f & f_progress) fprogress_clear(&ff);
- printf("INFO good-signature %s\n", d.buf);
- }
- freesig(s);
- } else if (verb) {
- if (f & f_progress) fprogress_clear(&ff);
- printf("INFO no-signature\n");
- }
-
- /* --- Now decrypt the main body --- */
-
- if (!of || strcmp(of, "-") == 0) {
- ofp = stdout;
- f |= f_buffer;
- }
- if (!(f & f_buffer)) {
- if ((ofp = fopen(of, "wb")) == 0) {
- if (f & f_progress) fprogress_done(&ff);
- die(EXIT_FAILURE, "couldn't open file `%s' for output: %s",
- ofp, strerror(errno));
- }
- rfp = ofp;
- } else if ((rfp = tmpfile()) == 0) {
- if (f & f_progress) fprogress_done(&ff);
- die(EXIT_FAILURE, "couldn't create temporary file: %s", strerror(errno));
- }
-
- seq = 0;
- dstr_ensure(&d, GC_CLASS(c)->blksz);
- dstr_ensure(&d, 4);
- for (;;) {
- if (GC_CLASS(c)->blksz) {
- GC_ENCRYPT(cx, 0, d.buf, GC_CLASS(c)->blksz);
- GC_SETIV(c, d.buf);
- }
- h = GM_INIT(m);
- GH_HASHU32(h, seq);
- seq++;
- chunk_read(e, &d, &b);
- if (f & f_progress)
- fprogress_update(&ff, BLEFT(&b)*e->ops->ncook/e->ops->nraw);
- if ((tag = buf_get(&b, GM_CLASS(m)->hashsz)) == 0) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL bad ciphertext chunk: no tag\n");
- exit(EXIT_FAILURE);
- }
- GH_HASH(h, BCUR(&b), BLEFT(&b));
- if (memcmp(tag, GH_DONE(h, 0), GM_CLASS(m)->hashsz) != 0) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb)
- printf("FAIL bad ciphertext chunk: authentication failure\n");
- exit(EXIT_FAILURE);
- }
- GH_DESTROY(h);
- if (!BLEFT(&b))
- break;
- GC_DECRYPT(c, BCUR(&b), BCUR(&b), BLEFT(&b));
- if (fwrite(BCUR(&b), 1, BLEFT(&b), rfp) != BLEFT(&b)) {
- if (f & f_progress) fprogress_done(&ff);
- if (verb) printf("FAIL error writing output: %s\n", strerror(errno));
- exit(EXIT_FAILURE);
- }
- }
-
- if (f & f_progress) fprogress_done(&ff);
- if (fflush(rfp) || ferror(rfp)) {
- if (verb) printf("FAIL error writing output: %s\n", strerror(errno));
- exit(EXIT_FAILURE);
- }
- if (f & f_buffer) {
- if (!ofp && (ofp = fopen(of, "wb")) == 0) {
- die(EXIT_FAILURE, "couldn't open file `%s' for output: %s",
- of, strerror(errno));
- }
- rewind(rfp);
- if (f & f_progress) fprogress_init(&ff, "copying buffer", rfp);
- dstr_reset(&d);
- dstr_ensure(&d, 65536);
- if (verb && ofp == stdout) printf("DATA\n");
- for (;;) {
- n = fread(d.buf, 1, d.sz, rfp);
- if (!n) break;
- if (f & f_progress) fprogress_update(&ff, n);
- if (fwrite(d.buf, 1, n, ofp) < n) {
- if (f & f_progress) fprogress_done(&ff);
- die(EXIT_FAILURE, "error writing output: %s", strerror(errno));
- }
- }
- if (f & f_progress) fprogress_done(&ff);
- if (ferror(rfp) || fclose(rfp))
- die(EXIT_FAILURE, "error unbuffering output: %s", strerror(errno));
- }
-
- e->ops->decdone(e);
- if (verb && ofp != stdout)
- printf("OK decrypted successfully\n");
- if (ofp && (fflush(ofp) || ferror(ofp) || fclose(ofp)))
- die(EXIT_FAILURE, "error writing output: %s", strerror(errno));
- freeenc(e);
- GC_DESTROY(c);
- GC_DESTROY(cx);
- GM_DESTROY(m);
- freekem(km);
- if (fp != stdin) fclose(fp);
- key_close(&kf);
- dstr_destroy(&d);
- return (0);
-
-#undef f_bogus
-#undef f_buffer
-#undef f_nocheck
-#undef f_progress
-}
-
-/*----- Main code ---------------------------------------------------------*/
-
-#define LISTS(LI) \
- LI("Lists", list, \
- listtab[i].name, listtab[i].name) \
- LI("Key-encapsulation mechanisms", kem, \
- kemtab[i].name, kemtab[i].name) \
- LI("Signature schemes", sig, \
- sigtab[i].name, sigtab[i].name) \
- LI("Encodings", enc, \
- enctab[i].name, enctab[i].name) \
- LI("Symmetric encryption algorithms", cipher, \
- gciphertab[i], gciphertab[i]->name) \
- LI("Hash functions", hash, \
- ghashtab[i], ghashtab[i]->name) \
- LI("Message authentication codes", mac, \
- gmactab[i], gmactab[i]->name)
-
-MAKELISTTAB(listtab, LISTS)
-
-int cmd_show(int argc, char *argv[])
-{
- return (displaylists(listtab, argv + 1));
-}
-
-static int cmd_help(int, char **);
-
-static cmd cmdtab[] = {
- { "help", cmd_help, "help [COMMAND...]" },
- { "show", cmd_show, "show [ITEM...]" },
- CMD_ENCODE,
- CMD_DECODE,
- { "encrypt", encrypt,
- "encrypt [-apC] [-k TAG] [-s TAG] [-f FORMAT]\n\t\
-[-o OUTPUT] [FILE]", "\
-Options:\n\
-\n\
--a, --armour Same as `-f pem'.\n\
--f, --format=FORMAT Encode as FORMAT.\n\
--k, --key=TAG Use public encryption key named by TAG.\n\
--s, --sign-key=TAG Use private signature key named by TAG.\n\
--o, --output=FILE Write output to FILE.\n\
--p, --progress Show progress on large files.\n\
--C, --nocheck Don't check the public key.\n\
-" },
- { "decrypt", decrypt,
- "decrypt [-abpqvC] [-f FORMAT] [-o OUTPUT] [FILE]", "\
-Options:\n\
-\n\
--a, --armour Same as `-f pem'.\n\
--b, --buffer Buffer output until we're sure we have it all.\n\
--f, --format=FORMAT Decode as FORMAT.\n\
--o, --output=FILE Write output to FILE.\n\
--p, --progress Show progress on large files.\n\
--q, --quiet Produce fewer messages.\n\
--v, --verbose Produce more verbose messages.\n\
--C, --nocheck Don't check the private key.\n\
-" },
- { 0, 0, 0 }
-};
-
-static int cmd_help(int argc, char **argv)
-{
- sc_help(cmdtab, stdout, argv + 1);
- return (0);
-}
-
-void version(FILE *fp)
-{
- pquis(fp, "$, Catacomb version " VERSION "\n");
-}
-
-static void usage(FILE *fp)
-{
- pquis(fp, "Usage: $ [-k KEYRING] COMMAND [ARGS]\n");
-}
-
-void help_global(FILE *fp)
-{
- usage(fp);
- fputs("\n\
-Encrypt and decrypt files.\n\
-\n\
-Global command-line options:\n\
-\n\
--h, --help [COMMAND...] Show this help message, or help for COMMANDs.\n\
--v, --version Show program version number.\n\
--u, --usage Show a terse usage message.\n\
-\n\
--k, --keyring=FILE Read keys from FILE.\n",
- fp);
-}
-
-/* --- @main@ --- *
- *
- * Arguments: @int argc@ = number of command line arguments
- * @char *argv[]@ = vector of command line arguments
- *
- * Returns: Zero if successful, nonzero otherwise.
- *
- * Use: Encrypts or decrypts files.
- */
-
-int main(int argc, char *argv[])
-{
- unsigned f = 0;
-
-#define f_bogus 1u
-
- /* --- Initialize the library --- */
-
- ego(argv[0]);
- sub_init();
- rand_noisesrc(RAND_GLOBAL, &noise_source);
- rand_seed(RAND_GLOBAL, 160);
-
- /* --- Parse options --- */
-
- for (;;) {
- static struct option opts[] = {
- { "help", 0, 0, 'h' },
- { "version", 0, 0, 'v' },
- { "usage", 0, 0, 'u' },
- { "keyring", OPTF_ARGREQ, 0, 'k' },
- { 0, 0, 0, 0 }
- };
- int i = mdwopt(argc, argv, "+hvu k:", opts, 0, 0, 0);
- if (i < 0)
- break;
- switch (i) {
- case 'h':
- sc_help(cmdtab, stdout, argv + optind);
- exit(0);
- break;
- case 'v':
- version(stdout);
- exit(0);
- break;
- case 'u':
- usage(stdout);
- exit(0);
- case 'k':
- keyring = optarg;
- break;
- default:
- f |= f_bogus;
- break;
- }
- }
-
- argc -= optind;
- argv += optind;
- optind = 0;
- if (f & f_bogus || argc < 1) {
- usage(stderr);
- exit(EXIT_FAILURE);
- }
-
- /* --- Dispatch to the correct subcommand handler --- */
-
- return (findcmd(cmdtab, argv[0])->cmd(argc, argv));
-
-#undef f_bogus
-}
-
-/*----- That's all, folks -------------------------------------------------*/
projects / u / mdw / catacomb / blobdiff