--- /dev/null
+/* -*-c-*-
+ *
+ * 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