=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/ssh-keygen.c,v retrieving revision 1.95 retrieving revision 1.113.2.1 diff -u -r1.95 -r1.113.2.1 --- src/usr.bin/ssh/ssh-keygen.c 2002/03/21 16:54:53 1.95 +++ src/usr.bin/ssh/ssh-keygen.c 2004/08/19 04:13:27 1.113.2.1 @@ -12,7 +12,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: ssh-keygen.c,v 1.95 2002/03/21 16:54:53 markus Exp $"); +RCSID("$OpenBSD: ssh-keygen.c,v 1.113.2.1 2004/08/19 04:13:27 brad Exp $"); #include #include @@ -26,11 +26,12 @@ #include "bufaux.h" #include "pathnames.h" #include "log.h" -#include "readpass.h" +#include "misc.h" #ifdef SMARTCARD #include "scard.h" #endif +#include "dns.h" /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */ int bits = 1024; @@ -70,6 +71,7 @@ int convert_to_ssh2 = 0; int convert_from_ssh2 = 0; int print_public = 0; +int print_generic = 0; char *key_type_name = NULL; @@ -78,6 +80,10 @@ char hostname[MAXHOSTNAMELEN]; +/* moduli.c */ +int gen_candidates(FILE *, int, int, BIGNUM *); +int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); + static void ask_filename(struct passwd *pw, const char *prompt) { @@ -105,7 +111,6 @@ snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); fprintf(stderr, "%s (%s): ", prompt, identity_file); - fflush(stderr); if (fgets(buf, sizeof(buf), stdin) == NULL) exit(1); if (strchr(buf, '\n')) @@ -136,7 +141,7 @@ } #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" -#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" +#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb @@ -160,13 +165,17 @@ exit(1); } } + if (k->type == KEY_RSA1) { + fprintf(stderr, "version 1 keys are not supported\n"); + exit(1); + } if (key_to_blob(k, &blob, &len) <= 0) { fprintf(stderr, "key_to_blob failed\n"); exit(1); } fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); fprintf(stdout, - "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n", + "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n", key_size(k), key_type(k), pw->pw_name, hostname); dump_base64(stdout, blob, len); @@ -179,8 +188,8 @@ static void buffer_get_bignum_bits(Buffer *b, BIGNUM *value) { - int bits = buffer_get_int(b); - int bytes = (bits + 7) / 8; + u_int bignum_bits = buffer_get_int(b); + u_int bytes = (bignum_bits + 7) / 8; if (buffer_len(b) < bytes) fatal("buffer_get_bignum_bits: input buffer too small: " @@ -286,6 +295,7 @@ { Key *k; int blen; + u_int len; char line[1024], *p; u_char blob[8096]; char encoded[8096]; @@ -330,6 +340,12 @@ *p = '\0'; strlcat(encoded, line, sizeof(encoded)); } + len = strlen(encoded); + if (((len % 4) == 3) && + (encoded[len-1] == '=') && + (encoded[len-2] == '=') && + (encoded[len-3] == '=')) + encoded[len-3] = '\0'; blen = uudecode(encoded, blob, sizeof(blob)); if (blen < 0) { fprintf(stderr, "uudecode failed.\n"); @@ -405,21 +421,25 @@ key_free(prv); if (ret < 0) exit(1); - log("loading key done"); + logit("loading key done"); exit(0); } static void do_download(struct passwd *pw, const char *sc_reader_id) { - Key *pub = NULL; + Key **keys = NULL; + int i; - pub = sc_get_key(sc_reader_id); - if (pub == NULL) + keys = sc_get_keys(sc_reader_id, NULL); + if (keys == NULL) fatal("cannot read public key from smartcard"); - key_write(pub, stdout); - key_free(pub); - fprintf(stdout, "\n"); + for (i = 0; keys[i]; i++) { + key_write(keys[i], stdout); + key_free(keys[i]); + fprintf(stdout, "\n"); + } + xfree(keys); exit(0); } #endif /* SMARTCARD */ @@ -447,7 +467,7 @@ public = key_load_public(identity_file, &comment); if (public != NULL) { fp = key_fingerprint(public, fptype, rep); - printf("%d %s %s\n", key_size(public), fp, comment); + printf("%u %s %s\n", key_size(public), fp, comment); key_free(public); xfree(comment); xfree(fp); @@ -481,7 +501,8 @@ if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) { int quoted = 0; comment = cp; - for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) { + for (; *cp && (quoted || (*cp != ' ' && + *cp != '\t')); cp++) { if (*cp == '\\' && cp[1] == '"') cp++; /* Skip both */ else if (*cp == '"') @@ -504,7 +525,7 @@ } comment = *cp ? cp : comment; fp = key_fingerprint(public, fptype, rep); - printf("%d %s %s\n", key_size(public), fp, + printf("%u %s %s\n", key_size(public), fp, comment ? comment : "no comment"); xfree(fp); key_free(public); @@ -602,6 +623,36 @@ } /* + * Print the SSHFP RR. + */ +static void +do_print_resource_record(struct passwd *pw, char *hname) +{ + Key *public; + char *comment = NULL; + struct stat st; + + if (!have_identity) + ask_filename(pw, "Enter file in which the key is"); + if (stat(identity_file, &st) < 0) { + perror(identity_file); + exit(1); + } + public = key_load_public(identity_file, &comment); + if (public != NULL) { + export_dns_rr(hname, public, stdout, print_generic); + key_free(public); + xfree(comment); + exit(0); + } + if (comment) + xfree(comment); + + printf("failed to read v2 public key from %s.\n", identity_file); + exit(1); +} + +/* * Change the comment of a private key file. */ static void @@ -707,6 +758,7 @@ fprintf(stderr, " -c Change comment in private and public key files.\n"); fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n"); fprintf(stderr, " -f filename Filename of the key file.\n"); + fprintf(stderr, " -g Use generic DNS resource record format.\n"); fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n"); fprintf(stderr, " -l Show fingerprint of key file.\n"); fprintf(stderr, " -p Change passphrase of private key file.\n"); @@ -717,11 +769,15 @@ fprintf(stderr, " -C comment Provide new comment.\n"); fprintf(stderr, " -N phrase Provide new passphrase.\n"); fprintf(stderr, " -P phrase Provide old passphrase.\n"); + fprintf(stderr, " -r hostname Print DNS resource record.\n"); #ifdef SMARTCARD fprintf(stderr, " -D reader Download public key from smartcard.\n"); fprintf(stderr, " -U reader Upload private key to smartcard.\n"); #endif /* SMARTCARD */ + fprintf(stderr, " -G file Generate candidates for DH-GEX moduli\n"); + fprintf(stderr, " -T file Screen candidates for DH-GEX moduli\n"); + exit(1); } @@ -732,17 +788,23 @@ main(int ac, char **av) { char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; - char *reader_id = NULL; + char out_file[MAXPATHLEN], *reader_id = NULL; + char *resource_record_hostname = NULL; Key *private, *public; struct passwd *pw; struct stat st; - int opt, type, fd, download = 0; + int opt, type, fd, download = 0, memory = 0; + int generator_wanted = 0, trials = 100; + int do_gen_candidates = 0, do_screen_candidates = 0; + int log_level = SYSLOG_LEVEL_INFO; + BIGNUM *start = NULL; FILE *f; extern int optind; extern char *optarg; SSLeay_add_all_algorithms(); + log_init(av[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); /* we need this for the home * directory. */ pw = getpwuid(getuid()); @@ -755,7 +817,8 @@ exit(1); } - while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) { + while ((opt = getopt(ac, av, + "degiqpclBRvxXyb:f:t:U:D:P:N:C:r:g:T:G:M:S:a:W:")) != -1) { switch (opt) { case 'b': bits = atoi(optarg); @@ -780,6 +843,9 @@ strlcpy(identity_file, optarg, sizeof(identity_file)); have_identity = 1; break; + case 'g': + print_generic = 1; + break; case 'P': identity_passphrase = optarg; break; @@ -820,11 +886,51 @@ case 'U': reader_id = optarg; break; + case 'v': + if (log_level == SYSLOG_LEVEL_INFO) + log_level = SYSLOG_LEVEL_DEBUG1; + else { + if (log_level >= SYSLOG_LEVEL_DEBUG1 && + log_level < SYSLOG_LEVEL_DEBUG3) + log_level++; + } + break; + case 'r': + resource_record_hostname = optarg; + break; + case 'W': + generator_wanted = atoi(optarg); + if (generator_wanted < 1) + fatal("Desired generator has bad value."); + break; + case 'a': + trials = atoi(optarg); + break; + case 'M': + memory = atoi(optarg); + break; + case 'G': + do_gen_candidates = 1; + strlcpy(out_file, optarg, sizeof(out_file)); + break; + case 'T': + do_screen_candidates = 1; + strlcpy(out_file, optarg, sizeof(out_file)); + break; + case 'S': + /* XXX - also compare length against bits */ + if (BN_hex2bn(&start, optarg) == 0) + fatal("Invalid start point."); + break; case '?': default: usage(); } } + + /* reinit */ + log_init(av[0], log_level, SYSLOG_FACILITY_USER, 1); + if (optind < ac) { printf("Too many arguments.\n"); usage(); @@ -845,6 +951,9 @@ do_convert_from_ssh2(pw); if (print_public) do_print_public(pw); + if (resource_record_hostname != NULL) { + do_print_resource_record(pw, resource_record_hostname); + } if (reader_id != NULL) { #ifdef SMARTCARD if (download) @@ -854,6 +963,42 @@ #else /* SMARTCARD */ fatal("no support for smartcards."); #endif /* SMARTCARD */ + } + + if (do_gen_candidates) { + FILE *out = fopen(out_file, "w"); + + if (out == NULL) { + error("Couldn't open modulus candidate file \"%s\": %s", + out_file, strerror(errno)); + return (1); + } + if (gen_candidates(out, memory, bits, start) != 0) + fatal("modulus candidate generation failed\n"); + + return (0); + } + + if (do_screen_candidates) { + FILE *in; + FILE *out = fopen(out_file, "w"); + + if (have_identity && strcmp(identity_file, "-") != 0) { + if ((in = fopen(identity_file, "r")) == NULL) { + fatal("Couldn't open modulus candidate " + "file \"%s\": %s", identity_file, + strerror(errno)); + } + } else + in = stdin; + + if (out == NULL) { + fatal("Couldn't open moduli file \"%s\": %s", + out_file, strerror(errno)); + } + if (prime_test(in, out, trials, generator_wanted) != 0) + fatal("modulus screening failed\n"); + return (0); } arc4random_stir();