+/* $OpenBSD: ssh-keygen.c,v 1.160 2007/01/21 01:41:54 stevesk Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: ssh-keygen.c,v 1.91 2002/01/18 18:14:17 stevesk Exp $");
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/param.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#include <pwd.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
#include "xmalloc.h"
#include "key.h"
#include "rsa.h"
#include "authfile.h"
#include "uuencode.h"
#include "buffer.h"
-#include "bufaux.h"
#include "pathnames.h"
#include "log.h"
-#include "readpass.h"
+#include "misc.h"
+#include "match.h"
+#include "hostfile.h"
+#include "dns.h"
#ifdef SMARTCARD
-#include <sectok.h>
-#include <openssl/engine.h>
#include "scard.h"
#endif
-/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */
-int bits = 1024;
+/* Number of bits in the RSA/DSA key. This value can be set on the command line. */
+#define DEFAULT_BITS 2048
+#define DEFAULT_BITS_DSA 1024
+u_int32_t bits = 0;
/*
* Flag indicating that we just want to change the passphrase. This can be
int quiet = 0;
+/* Flag indicating that we want to hash a known_hosts file */
+int hash_hosts = 0;
+/* Flag indicating that we want lookup a host in known_hosts file */
+int find_host = 0;
+/* Flag indicating that we want to delete a host from a known_hosts file */
+int delete_host = 0;
+
/* Flag indicating that we just want to see the key fingerprint */
int print_fingerprint = 0;
int print_bubblebabble = 0;
int convert_to_ssh2 = 0;
int convert_from_ssh2 = 0;
int print_public = 0;
+int print_generic = 0;
char *key_type_name = NULL;
/* argv0 */
-#ifdef HAVE___PROGNAME
extern char *__progname;
-#else
-char *__progname;
-#endif
char hostname[MAXHOSTNAMELEN];
+/* moduli.c */
+int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
+int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
+
static void
ask_filename(struct passwd *pw, const char *prompt)
{
char buf[1024];
char *name = NULL;
- switch (key_type_from_name(key_type_name)) {
- case KEY_RSA1:
- name = _PATH_SSH_CLIENT_IDENTITY;
- break;
- case KEY_DSA:
- name = _PATH_SSH_CLIENT_ID_DSA;
- break;
- case KEY_RSA:
+ if (key_type_name == NULL)
name = _PATH_SSH_CLIENT_ID_RSA;
- break;
- default:
- fprintf(stderr, "bad key type");
- exit(1);
- break;
+ else {
+ switch (key_type_from_name(key_type_name)) {
+ case KEY_RSA1:
+ name = _PATH_SSH_CLIENT_IDENTITY;
+ break;
+ case KEY_DSA:
+ name = _PATH_SSH_CLIENT_ID_DSA;
+ break;
+ case KEY_RSA:
+ name = _PATH_SSH_CLIENT_ID_RSA;
+ break;
+ default:
+ fprintf(stderr, "bad key type");
+ exit(1);
+ break;
+ }
}
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'))
}
#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
do_convert_to_ssh2(struct passwd *pw)
{
Key *k;
- int len;
+ u_int len;
u_char *blob;
struct stat st;
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);
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: "
"need %d have %d", bytes, buffer_len(b));
- BN_bin2bn(buffer_ptr(b), bytes, value);
+ if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
+ fatal("buffer_get_bignum_bits: BN_bin2bn failed");
buffer_consume(b, bytes);
}
static Key *
-do_convert_private_ssh2_from_blob(u_char *blob, int blen)
+do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
{
Buffer b;
Key *key = NULL;
buffer_init(&b);
buffer_append(&b, blob, blen);
- magic = buffer_get_int(&b);
+ magic = buffer_get_int(&b);
if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
buffer_free(&b);
i2 = buffer_get_int(&b);
i3 = buffer_get_int(&b);
i4 = buffer_get_int(&b);
- debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
+ debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
if (strcmp(cipher, "none") != 0) {
error("unsupported cipher %s", cipher);
xfree(cipher);
} else if (strstr(type, "rsa")) {
ktype = KEY_RSA;
} else {
+ buffer_free(&b);
xfree(type);
return NULL;
}
buffer_get_bignum_bits(&b, key->dsa->priv_key);
break;
case KEY_RSA:
- e = buffer_get_char(&b);
+ e = buffer_get_char(&b);
debug("e %lx", e);
if (e < 30) {
e <<= 8;
return key;
}
+static int
+get_line(FILE *fp, char *line, size_t len)
+{
+ int c;
+ size_t pos = 0;
+
+ line[0] = '\0';
+ while ((c = fgetc(fp)) != EOF) {
+ if (pos >= len - 1) {
+ fprintf(stderr, "input line too long.\n");
+ exit(1);
+ }
+ switch (c) {
+ case '\r':
+ c = fgetc(fp);
+ if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
+ fprintf(stderr, "unget: %s\n", strerror(errno));
+ exit(1);
+ }
+ return pos;
+ case '\n':
+ return pos;
+ }
+ line[pos++] = c;
+ line[pos] = '\0';
+ }
+ /* We reached EOF */
+ return -1;
+}
+
static void
do_convert_from_ssh2(struct passwd *pw)
{
Key *k;
int blen;
- char line[1024], *p;
+ u_int len;
+ char line[1024];
u_char blob[8096];
char encoded[8096];
struct stat st;
exit(1);
}
encoded[0] = '\0';
- while (fgets(line, sizeof(line), fp)) {
- if (!(p = strchr(line, '\n'))) {
- fprintf(stderr, "input line too long.\n");
- exit(1);
- }
- if (p > line && p[-1] == '\\')
+ while ((blen = get_line(fp, line, sizeof(line))) != -1) {
+ if (line[blen - 1] == '\\')
escaped++;
if (strncmp(line, "----", 4) == 0 ||
strstr(line, ": ") != NULL) {
/* fprintf(stderr, "escaped: %s", line); */
continue;
}
- *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");
}
#ifdef SMARTCARD
-#define NUM_RSA_KEY_ELEMENTS 5+1
-#define COPY_RSA_KEY(x, i) \
- do { \
- len = BN_num_bytes(prv->rsa->x); \
- elements[i] = xmalloc(len); \
- debug("#bytes %d", len); \
- if (BN_bn2bin(prv->rsa->x, elements[i]) < 0) \
- goto done; \
- } while (0)
-
-static int
-get_AUT0(char *aut0)
-{
- EVP_MD *evp_md = EVP_sha1();
- EVP_MD_CTX md;
- char *pass;
-
- pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
- if (pass == NULL)
- return -1;
- EVP_DigestInit(&md, evp_md);
- EVP_DigestUpdate(&md, pass, strlen(pass));
- EVP_DigestFinal(&md, aut0, NULL);
- memset(pass, 0, strlen(pass));
- xfree(pass);
- return 0;
-}
-
static void
do_upload(struct passwd *pw, const char *sc_reader_id)
{
Key *prv = NULL;
struct stat st;
- u_char *elements[NUM_RSA_KEY_ELEMENTS];
- u_char key_fid[2];
- u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
- u_char AUT0[EVP_MAX_MD_SIZE];
- int len, status = 1, i, fd = -1, ret;
- int sw = 0, cla = 0x00;
-
- for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
- elements[i] = NULL;
+ int ret;
+
if (!have_identity)
ask_filename(pw, "Enter file in which the key is");
if (stat(identity_file, &st) < 0) {
perror(identity_file);
- goto done;
+ exit(1);
}
prv = load_identity(identity_file);
if (prv == NULL) {
error("load failed");
- goto done;
- }
- COPY_RSA_KEY(q, 0);
- COPY_RSA_KEY(p, 1);
- COPY_RSA_KEY(iqmp, 2);
- COPY_RSA_KEY(dmq1, 3);
- COPY_RSA_KEY(dmp1, 4);
- COPY_RSA_KEY(n, 5);
- len = BN_num_bytes(prv->rsa->n);
- fd = sectok_friendly_open(sc_reader_id, STONOWAIT, &sw);
- if (fd < 0) {
- error("sectok_open failed: %s", sectok_get_sw(sw));
- goto done;
- }
- if (! sectok_cardpresent(fd)) {
- error("smartcard in reader %s not present",
- sc_reader_id);
- goto done;
- }
- ret = sectok_reset(fd, 0, NULL, &sw);
- if (ret <= 0) {
- error("sectok_reset failed: %s", sectok_get_sw(sw));
- goto done;
- }
- if ((cla = cyberflex_inq_class(fd)) < 0) {
- error("cyberflex_inq_class failed");
- goto done;
- }
- memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
- if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
- if (get_AUT0(AUT0) < 0 ||
- cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
- error("cyberflex_verify_AUT0 failed");
- goto done;
- }
+ exit(1);
}
- key_fid[0] = 0x00;
- key_fid[1] = 0x12;
- if (cyberflex_load_rsa_priv(fd, cla, key_fid, 5, 8*len, elements,
- &sw) < 0) {
- error("cyberflex_load_rsa_priv failed: %s", sectok_get_sw(sw));
- goto done;
- }
- if (!sectok_swOK(sw))
- goto done;
- log("cyberflex_load_rsa_priv done");
- key_fid[0] = 0x73;
- key_fid[1] = 0x68;
- if (cyberflex_load_rsa_pub(fd, cla, key_fid, len, elements[5],
- &sw) < 0) {
- error("cyberflex_load_rsa_pub failed: %s", sectok_get_sw(sw));
- goto done;
- }
- if (!sectok_swOK(sw))
- goto done;
- log("cyberflex_load_rsa_pub done");
- status = 0;
- log("loading key done");
-done:
-
- memset(elements[0], '\0', BN_num_bytes(prv->rsa->q));
- memset(elements[1], '\0', BN_num_bytes(prv->rsa->p));
- memset(elements[2], '\0', BN_num_bytes(prv->rsa->iqmp));
- memset(elements[3], '\0', BN_num_bytes(prv->rsa->dmq1));
- memset(elements[4], '\0', BN_num_bytes(prv->rsa->dmp1));
- memset(elements[5], '\0', BN_num_bytes(prv->rsa->n));
-
- if (prv)
- key_free(prv);
- for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
- if (elements[i])
- xfree(elements[i]);
- if (fd != -1)
- sectok_close(fd);
- exit(status);
+ ret = sc_put_key(prv, sc_reader_id);
+ key_free(prv);
+ if (ret < 0)
+ exit(1);
+ 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 */
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);
exit(0);
}
- if (comment)
+ if (comment) {
xfree(comment);
+ comment = NULL;
+ }
f = fopen(identity_file, "r");
if (f != NULL) {
for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '\n' || *cp == '#')
- continue ;
+ continue;
i = strtol(cp, &ep, 10);
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 == '"')
}
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);
exit(0);
}
+static void
+print_host(FILE *f, char *name, Key *public, int hash)
+{
+ if (hash && (name = host_hash(name, NULL, 0)) == NULL)
+ fatal("hash_host failed");
+ fprintf(f, "%s ", name);
+ if (!key_write(public, f))
+ fatal("key_write failed");
+ fprintf(f, "\n");
+}
+
+static void
+do_known_hosts(struct passwd *pw, const char *name)
+{
+ FILE *in, *out = stdout;
+ Key *public;
+ char *cp, *cp2, *kp, *kp2;
+ char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
+ int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
+
+ if (!have_identity) {
+ cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
+ if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
+ sizeof(identity_file))
+ fatal("Specified known hosts path too long");
+ xfree(cp);
+ have_identity = 1;
+ }
+ if ((in = fopen(identity_file, "r")) == NULL)
+ fatal("fopen: %s", strerror(errno));
+
+ /*
+ * Find hosts goes to stdout, hash and deletions happen in-place
+ * A corner case is ssh-keygen -HF foo, which should go to stdout
+ */
+ if (!find_host && (hash_hosts || delete_host)) {
+ if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
+ strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
+ strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
+ strlcat(old, ".old", sizeof(old)) >= sizeof(old))
+ fatal("known_hosts path too long");
+ umask(077);
+ if ((c = mkstemp(tmp)) == -1)
+ fatal("mkstemp: %s", strerror(errno));
+ if ((out = fdopen(c, "w")) == NULL) {
+ c = errno;
+ unlink(tmp);
+ fatal("fdopen: %s", strerror(c));
+ }
+ inplace = 1;
+ }
+
+ while (fgets(line, sizeof(line), in)) {
+ num++;
+ i = strlen(line) - 1;
+ if (line[i] != '\n') {
+ error("line %d too long: %.40s...", num, line);
+ skip = 1;
+ invalid = 1;
+ continue;
+ }
+ if (skip) {
+ skip = 0;
+ continue;
+ }
+ line[i] = '\0';
+
+ /* Skip leading whitespace, empty and comment lines. */
+ for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+ if (!*cp || *cp == '\n' || *cp == '#') {
+ if (inplace)
+ fprintf(out, "%s\n", cp);
+ continue;
+ }
+ /* Find the end of the host name portion. */
+ for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
+ ;
+ if (*kp == '\0' || *(kp + 1) == '\0') {
+ error("line %d missing key: %.40s...",
+ num, line);
+ invalid = 1;
+ continue;
+ }
+ *kp++ = '\0';
+ kp2 = kp;
+
+ public = key_new(KEY_RSA1);
+ if (key_read(public, &kp) != 1) {
+ kp = kp2;
+ key_free(public);
+ public = key_new(KEY_UNSPEC);
+ if (key_read(public, &kp) != 1) {
+ error("line %d invalid key: %.40s...",
+ num, line);
+ key_free(public);
+ invalid = 1;
+ continue;
+ }
+ }
+
+ if (*cp == HASH_DELIM) {
+ if (find_host || delete_host) {
+ cp2 = host_hash(name, cp, strlen(cp));
+ if (cp2 == NULL) {
+ error("line %d: invalid hashed "
+ "name: %.64s...", num, line);
+ invalid = 1;
+ continue;
+ }
+ c = (strcmp(cp2, cp) == 0);
+ if (find_host && c) {
+ printf("# Host %s found: "
+ "line %d type %s\n", name,
+ num, key_type(public));
+ print_host(out, cp, public, 0);
+ }
+ if (delete_host && !c)
+ print_host(out, cp, public, 0);
+ } else if (hash_hosts)
+ print_host(out, cp, public, 0);
+ } else {
+ if (find_host || delete_host) {
+ c = (match_hostname(name, cp,
+ strlen(cp)) == 1);
+ if (find_host && c) {
+ printf("# Host %s found: "
+ "line %d type %s\n", name,
+ num, key_type(public));
+ print_host(out, cp, public, hash_hosts);
+ }
+ if (delete_host && !c)
+ print_host(out, cp, public, 0);
+ } else if (hash_hosts) {
+ for (cp2 = strsep(&cp, ",");
+ cp2 != NULL && *cp2 != '\0';
+ cp2 = strsep(&cp, ",")) {
+ if (strcspn(cp2, "*?!") != strlen(cp2))
+ fprintf(stderr, "Warning: "
+ "ignoring host name with "
+ "metacharacters: %.64s\n",
+ cp2);
+ else
+ print_host(out, cp2, public, 1);
+ }
+ has_unhashed = 1;
+ }
+ }
+ key_free(public);
+ }
+ fclose(in);
+
+ if (invalid) {
+ fprintf(stderr, "%s is not a valid known_host file.\n",
+ identity_file);
+ if (inplace) {
+ fprintf(stderr, "Not replacing existing known_hosts "
+ "file because of errors\n");
+ fclose(out);
+ unlink(tmp);
+ }
+ exit(1);
+ }
+
+ if (inplace) {
+ fclose(out);
+
+ /* Backup existing file */
+ if (unlink(old) == -1 && errno != ENOENT)
+ fatal("unlink %.100s: %s", old, strerror(errno));
+ if (link(identity_file, old) == -1)
+ fatal("link %.100s to %.100s: %s", identity_file, old,
+ strerror(errno));
+ /* Move new one into place */
+ if (rename(tmp, identity_file) == -1) {
+ error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
+ strerror(errno));
+ unlink(tmp);
+ unlink(old);
+ exit(1);
+ }
+
+ fprintf(stderr, "%s updated.\n", identity_file);
+ fprintf(stderr, "Original contents retained as %s\n", old);
+ if (has_unhashed) {
+ fprintf(stderr, "WARNING: %s contains unhashed "
+ "entries\n", old);
+ fprintf(stderr, "Delete this file to ensure privacy "
+ "of hostnames\n");
+ }
+ }
+
+ exit(0);
+}
+
/*
* Perform changing a passphrase. The argument is the passwd structure
* for the current user.
exit(0);
}
+/*
+ * Print the SSHFP RR.
+ */
+static int
+do_print_resource_record(struct passwd *pw, char *fname, char *hname)
+{
+ Key *public;
+ char *comment = NULL;
+ struct stat st;
+
+ if (fname == NULL)
+ ask_filename(pw, "Enter file in which the key is");
+ if (stat(fname, &st) < 0) {
+ if (errno == ENOENT)
+ return 0;
+ perror(fname);
+ exit(1);
+ }
+ public = key_load_public(fname, &comment);
+ if (public != NULL) {
+ export_dns_rr(hname, public, stdout, print_generic);
+ key_free(public);
+ xfree(comment);
+ return 1;
+ }
+ if (comment)
+ xfree(comment);
+
+ printf("failed to read v2 public key from %s.\n", fname);
+ exit(1);
+}
+
/*
* Change the comment of a private key file.
*/
{
fprintf(stderr, "Usage: %s [options]\n", __progname);
fprintf(stderr, "Options:\n");
+ fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
+ fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
fprintf(stderr, " -b bits Number of bits in the key to create.\n");
+ fprintf(stderr, " -C comment Provide new comment.\n");
fprintf(stderr, " -c Change comment in private and public key files.\n");
- fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
+#ifdef SMARTCARD
+ fprintf(stderr, " -D reader Download public key from smartcard.\n");
+#endif /* SMARTCARD */
+ fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n");
+ fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
fprintf(stderr, " -f filename Filename of the key file.\n");
- fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
+ fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
+ fprintf(stderr, " -g Use generic DNS resource record format.\n");
+ fprintf(stderr, " -H Hash names in known_hosts file.\n");
+ fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n");
fprintf(stderr, " -l Show fingerprint of key file.\n");
+ fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
+ fprintf(stderr, " -N phrase Provide new passphrase.\n");
+ fprintf(stderr, " -P phrase Provide old passphrase.\n");
fprintf(stderr, " -p Change passphrase of private key file.\n");
fprintf(stderr, " -q Quiet.\n");
- fprintf(stderr, " -y Read private key file and print public key.\n");
+ fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
+ fprintf(stderr, " -r hostname Print DNS resource record.\n");
+ fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
+ fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
fprintf(stderr, " -t type Specify type of key to create.\n");
- fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
- fprintf(stderr, " -C comment Provide new comment.\n");
- fprintf(stderr, " -N phrase Provide new passphrase.\n");
- fprintf(stderr, " -P phrase Provide old passphrase.\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, " -v Verbose.\n");
+ fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
+ fprintf(stderr, " -y Read private key file and print public key.\n");
exit(1);
}
* Main program for key management.
*/
int
-main(int ac, char **av)
+main(int argc, char **argv)
{
char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
- char *reader_id = NULL;
+ char out_file[MAXPATHLEN], *reader_id = NULL;
+ char *rr_hostname = NULL;
Key *private, *public;
struct passwd *pw;
struct stat st;
int opt, type, fd, download = 0;
+ u_int32_t memory = 0, 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;
+ const char *errstr;
extern int optind;
extern char *optarg;
- __progname = get_progname(av[0]);
- init_rng();
- seed_rng();
+ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+ sanitise_stdfd();
+
+ __progname = ssh_get_progname(argv[0]);
SSLeay_add_all_algorithms();
+ log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
+
+ init_rng();
+ seed_rng();
/* we need this for the home * directory. */
pw = getpwuid(getuid());
exit(1);
}
- while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) {
+ while ((opt = getopt(argc, argv,
+ "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
switch (opt) {
case 'b':
- bits = atoi(optarg);
- if (bits < 512 || bits > 32768) {
- printf("Bits has bad value.\n");
- exit(1);
- }
+ bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr);
+ if (errstr)
+ fatal("Bits has bad value %s (%s)",
+ optarg, errstr);
+ break;
+ case 'F':
+ find_host = 1;
+ rr_hostname = optarg;
+ break;
+ case 'H':
+ hash_hosts = 1;
+ break;
+ case 'R':
+ delete_host = 1;
+ rr_hostname = optarg;
break;
case 'l':
print_fingerprint = 1;
change_comment = 1;
break;
case 'f':
- strlcpy(identity_file, optarg, sizeof(identity_file));
+ if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
+ sizeof(identity_file))
+ fatal("Identity filename too long");
have_identity = 1;
break;
+ case 'g':
+ print_generic = 1;
+ break;
case 'P':
identity_passphrase = optarg;
break;
case 'q':
quiet = 1;
break;
- case 'R':
- /* unused */
- exit(0);
- break;
case 'e':
case 'x':
/* export key */
break;
case 'D':
download = 1;
+ /*FALLTHROUGH*/
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':
+ rr_hostname = optarg;
+ break;
+ case 'W':
+ generator_wanted = (u_int32_t)strtonum(optarg, 1,
+ UINT_MAX, &errstr);
+ if (errstr)
+ fatal("Desired generator has bad value: %s (%s)",
+ optarg, errstr);
+ break;
+ case 'a':
+ trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
+ if (errstr)
+ fatal("Invalid number of trials: %s (%s)",
+ optarg, errstr);
+ break;
+ case 'M':
+ memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
+ if (errstr) {
+ fatal("Memory limit is %s: %s", errstr, optarg);
+ }
+ break;
+ case 'G':
+ do_gen_candidates = 1;
+ if (strlcpy(out_file, optarg, sizeof(out_file)) >=
+ sizeof(out_file))
+ fatal("Output filename too long");
+ break;
+ case 'T':
+ do_screen_candidates = 1;
+ if (strlcpy(out_file, optarg, sizeof(out_file)) >=
+ sizeof(out_file))
+ fatal("Output filename too long");
+ break;
+ case 'S':
+ /* XXX - also compare length against bits */
+ if (BN_hex2bn(&start, optarg) == 0)
+ fatal("Invalid start point.");
+ break;
case '?':
default:
usage();
}
}
- if (optind < ac) {
+
+ /* reinit */
+ log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
+
+ if (optind < argc) {
printf("Too many arguments.\n");
usage();
}
printf("Can only have one of -p and -c.\n");
usage();
}
+ if (delete_host || hash_hosts || find_host)
+ do_known_hosts(pw, rr_hostname);
if (print_fingerprint || print_bubblebabble)
do_fingerprint(pw);
if (change_passphrase)
do_convert_from_ssh2(pw);
if (print_public)
do_print_public(pw);
+ if (rr_hostname != NULL) {
+ unsigned int n = 0;
+
+ if (have_identity) {
+ n = do_print_resource_record(pw,
+ identity_file, rr_hostname);
+ if (n == 0) {
+ perror(identity_file);
+ exit(1);
+ }
+ exit(0);
+ } else {
+
+ n += do_print_resource_record(pw,
+ _PATH_HOST_RSA_KEY_FILE, rr_hostname);
+ n += do_print_resource_record(pw,
+ _PATH_HOST_DSA_KEY_FILE, rr_hostname);
+
+ if (n == 0)
+ fatal("no keys found.");
+ exit(0);
+ }
+ }
if (reader_id != NULL) {
#ifdef SMARTCARD
if (download)
#endif /* SMARTCARD */
}
- arc4random_stir();
+ if (do_gen_candidates) {
+ FILE *out = fopen(out_file, "w");
- if (key_type_name == NULL) {
- printf("You must specify a key type (-t).\n");
- usage();
+ if (out == NULL) {
+ error("Couldn't open modulus candidate file \"%s\": %s",
+ out_file, strerror(errno));
+ return (1);
+ }
+ if (bits == 0)
+ bits = DEFAULT_BITS;
+ if (gen_candidates(out, memory, bits, start) != 0)
+ fatal("modulus candidate generation failed");
+
+ 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");
+ return (0);
}
+
+ arc4random_stir();
+
+ if (key_type_name == NULL)
+ key_type_name = "rsa";
+
type = key_type_from_name(key_type_name);
if (type == KEY_UNSPEC) {
fprintf(stderr, "unknown key type %s\n", key_type_name);
exit(1);
}
+ if (bits == 0)
+ bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
+ if (type == KEY_DSA && bits != 1024)
+ fatal("DSA keys must be 1024 bits");
if (!quiet)
printf("Generating public/private %s key pair.\n", key_type_name);
private = key_generate(type, bits);
if (!have_identity)
ask_filename(pw, "Enter file in which to save the key");
- /* Create ~/.ssh directory if it doesn\'t already exist. */
+ /* Create ~/.ssh directory if it doesn't already exist. */
snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
if (strstr(identity_file, dotsshdir) != NULL &&
stat(dotsshdir, &st) < 0) {