+/* $OpenBSD: ssh-keygen.c,v 1.176 2010/01/11 10:51:07 djm Exp $ */
/*
-
-ssh-keygen.c
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
-
-Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
-
-Created: Mon Mar 27 02:26:40 1995 ylo
-
-Identity and host key generation and maintenance.
-
-*/
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * Identity and host key generation and maintenance.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
#include "includes.h"
-RCSID("$Id$");
-
-#include "rsa.h"
-#include "ssh.h"
-#include "xmalloc.h"
-
-#ifdef HAVE___PROGNAME
-extern char *__progname;
-#else /* HAVE___PROGNAME */
-const char *__progname = "ssh-keygen";
-#endif /* HAVE___PROGNAME */
-/* Generated private key. */
-RSA *private_key;
+#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 "openbsd-compat/openssl-compat.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>
-/* Generated public key. */
-RSA *public_key;
-
-/* Number of bits in the RSA key. This value can be changed on the command
- line. */
-int bits = 1024;
+#include "xmalloc.h"
+#include "key.h"
+#include "rsa.h"
+#include "authfile.h"
+#include "uuencode.h"
+#include "buffer.h"
+#include "pathnames.h"
+#include "log.h"
+#include "misc.h"
+#include "match.h"
+#include "hostfile.h"
+#include "dns.h"
+
+#ifdef SMARTCARD
+#include "scard.h"
+#endif
+
+/* 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
- set on the command line. */
+/*
+ * Flag indicating that we just want to change the passphrase. This can be
+ * set on the command line.
+ */
int change_passphrase = 0;
-/* Flag indicating that we just want to change the comment. This can be set
- on the command line. */
+/*
+ * Flag indicating that we just want to change the comment. This can be set
+ * on the command line.
+ */
int change_comment = 0;
int quiet = 0;
-/* This is set to the identity file name if given on the command line. */
-char *identity_file = NULL;
+int log_level = SYSLOG_LEVEL_INFO;
+
+/* 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;
+
+/* The identity file name, given on the command line or entered by the user. */
+char identity_file[1024];
+int have_identity = 0;
/* This is set to the passphrase if given on the command line. */
char *identity_passphrase = NULL;
/* This is set to the new comment if given on the command line. */
char *identity_comment = NULL;
-/* Perform changing a passphrase. The argument is the passwd structure
- for the current user. */
+/* Dump public key file in format used by real and the original SSH 2 */
+int convert_to_ssh2 = 0;
+int convert_from_ssh2 = 0;
+int print_public = 0;
+int print_generic = 0;
+
+char *key_type_name = NULL;
+
+/* argv0 */
+extern char *__progname;
+
+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;
+
+ if (key_type_name == NULL)
+ name = _PATH_SSH_CLIENT_ID_RSA;
+ 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\n");
+ exit(1);
+ break;
+ }
+ }
+ snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
+ fprintf(stderr, "%s (%s): ", prompt, identity_file);
+ if (fgets(buf, sizeof(buf), stdin) == NULL)
+ exit(1);
+ buf[strcspn(buf, "\n")] = '\0';
+ if (strcmp(buf, "") != 0)
+ strlcpy(identity_file, buf, sizeof(identity_file));
+ have_identity = 1;
+}
+
+static Key *
+load_identity(char *filename)
+{
+ char *pass;
+ Key *prv;
+
+ prv = key_load_private(filename, "", NULL);
+ if (prv == NULL) {
+ if (identity_passphrase)
+ pass = xstrdup(identity_passphrase);
+ else
+ pass = read_passphrase("Enter passphrase: ",
+ RP_ALLOW_STDIN);
+ prv = key_load_private(filename, pass, NULL);
+ memset(pass, 0, strlen(pass));
+ xfree(pass);
+ }
+ return prv;
+}
+
+#define SSH_COM_PUBLIC_BEGIN "---- BEGIN 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
+
+static void
+do_convert_to_ssh2(struct passwd *pw)
+{
+ Key *k;
+ u_int len;
+ u_char *blob;
+ char comment[61];
+ 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);
+ }
+ if ((k = key_load_public(identity_file, NULL)) == NULL) {
+ if ((k = load_identity(identity_file)) == NULL) {
+ fprintf(stderr, "load failed\n");
+ 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);
+ }
+ /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
+ snprintf(comment, sizeof(comment),
+ "%u-bit %s, converted by %s@%s from OpenSSH",
+ key_size(k), key_type(k),
+ pw->pw_name, hostname);
+
+ fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
+ fprintf(stdout, "Comment: \"%s\"\n", comment);
+ dump_base64(stdout, blob, len);
+ fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
+ key_free(k);
+ xfree(blob);
+ exit(0);
+}
+
+static void
+buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
+{
+ 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));
+ 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, u_int blen)
+{
+ Buffer b;
+ Key *key = NULL;
+ char *type, *cipher;
+ u_char *sig, data[] = "abcde12345";
+ int magic, rlen, ktype, i1, i2, i3, i4;
+ u_int slen;
+ u_long e;
+
+ buffer_init(&b);
+ buffer_append(&b, blob, blen);
+
+ 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);
+ return NULL;
+ }
+ i1 = buffer_get_int(&b);
+ type = buffer_get_string(&b, NULL);
+ cipher = buffer_get_string(&b, NULL);
+ 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);
+ if (strcmp(cipher, "none") != 0) {
+ error("unsupported cipher %s", cipher);
+ xfree(cipher);
+ buffer_free(&b);
+ xfree(type);
+ return NULL;
+ }
+ xfree(cipher);
+
+ if (strstr(type, "dsa")) {
+ ktype = KEY_DSA;
+ } else if (strstr(type, "rsa")) {
+ ktype = KEY_RSA;
+ } else {
+ buffer_free(&b);
+ xfree(type);
+ return NULL;
+ }
+ key = key_new_private(ktype);
+ xfree(type);
+
+ switch (key->type) {
+ case KEY_DSA:
+ buffer_get_bignum_bits(&b, key->dsa->p);
+ buffer_get_bignum_bits(&b, key->dsa->g);
+ buffer_get_bignum_bits(&b, key->dsa->q);
+ buffer_get_bignum_bits(&b, key->dsa->pub_key);
+ buffer_get_bignum_bits(&b, key->dsa->priv_key);
+ break;
+ case KEY_RSA:
+ e = buffer_get_char(&b);
+ debug("e %lx", e);
+ if (e < 30) {
+ e <<= 8;
+ e += buffer_get_char(&b);
+ debug("e %lx", e);
+ e <<= 8;
+ e += buffer_get_char(&b);
+ debug("e %lx", e);
+ }
+ if (!BN_set_word(key->rsa->e, e)) {
+ buffer_free(&b);
+ key_free(key);
+ return NULL;
+ }
+ buffer_get_bignum_bits(&b, key->rsa->d);
+ buffer_get_bignum_bits(&b, key->rsa->n);
+ buffer_get_bignum_bits(&b, key->rsa->iqmp);
+ buffer_get_bignum_bits(&b, key->rsa->q);
+ buffer_get_bignum_bits(&b, key->rsa->p);
+ rsa_generate_additional_parameters(key->rsa);
+ break;
+ }
+ rlen = buffer_len(&b);
+ if (rlen != 0)
+ error("do_convert_private_ssh2_from_blob: "
+ "remaining bytes in key blob %d", rlen);
+ buffer_free(&b);
+
+ /* try the key */
+ key_sign(key, &sig, &slen, data, sizeof(data));
+ key_verify(key, sig, slen, data, sizeof(data));
+ xfree(sig);
+ 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;
+ u_int len;
+ char line[1024];
+ u_char blob[8096];
+ char encoded[8096];
+ struct stat st;
+ int escaped = 0, private = 0, ok;
+ FILE *fp;
+
+ if (!have_identity)
+ ask_filename(pw, "Enter file in which the key is");
+ if (stat(identity_file, &st) < 0) {
+ perror(identity_file);
+ exit(1);
+ }
+ fp = fopen(identity_file, "r");
+ if (fp == NULL) {
+ perror(identity_file);
+ exit(1);
+ }
+ encoded[0] = '\0';
+ while ((blen = get_line(fp, line, sizeof(line))) != -1) {
+ if (line[blen - 1] == '\\')
+ escaped++;
+ if (strncmp(line, "----", 4) == 0 ||
+ strstr(line, ": ") != NULL) {
+ if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
+ private = 1;
+ if (strstr(line, " END ") != NULL) {
+ break;
+ }
+ /* fprintf(stderr, "ignore: %s", line); */
+ continue;
+ }
+ if (escaped) {
+ escaped--;
+ /* fprintf(stderr, "escaped: %s", line); */
+ continue;
+ }
+ 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");
+ exit(1);
+ }
+ k = private ?
+ do_convert_private_ssh2_from_blob(blob, blen) :
+ key_from_blob(blob, blen);
+ if (k == NULL) {
+ fprintf(stderr, "decode blob failed.\n");
+ exit(1);
+ }
+ ok = private ?
+ (k->type == KEY_DSA ?
+ PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
+ PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
+ key_write(k, stdout);
+ if (!ok) {
+ fprintf(stderr, "key write failed\n");
+ exit(1);
+ }
+ key_free(k);
+ if (!private)
+ fprintf(stdout, "\n");
+ fclose(fp);
+ exit(0);
+}
+
+static void
+do_print_public(struct passwd *pw)
+{
+ Key *prv;
+ 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);
+ }
+ prv = load_identity(identity_file);
+ if (prv == NULL) {
+ fprintf(stderr, "load failed\n");
+ exit(1);
+ }
+ if (!key_write(prv, stdout))
+ fprintf(stderr, "key_write failed");
+ key_free(prv);
+ fprintf(stdout, "\n");
+ exit(0);
+}
+
+#ifdef SMARTCARD
+static void
+do_upload(struct passwd *pw, const char *sc_reader_id)
+{
+ Key *prv = NULL;
+ struct stat st;
+ int ret;
+
+ if (!have_identity)
+ ask_filename(pw, "Enter file in which the key is");
+ if (stat(identity_file, &st) < 0) {
+ perror(identity_file);
+ exit(1);
+ }
+ prv = load_identity(identity_file);
+ if (prv == NULL) {
+ error("load failed");
+ exit(1);
+ }
+ 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 **keys = NULL;
+ int i;
+
+ keys = sc_get_keys(sc_reader_id, NULL);
+ if (keys == NULL)
+ fatal("cannot read public key from smartcard");
+ for (i = 0; keys[i]; i++) {
+ key_write(keys[i], stdout);
+ key_free(keys[i]);
+ fprintf(stdout, "\n");
+ }
+ xfree(keys);
+ exit(0);
+}
+#endif /* SMARTCARD */
+
+static void
+do_fingerprint(struct passwd *pw)
+{
+ FILE *f;
+ Key *public;
+ char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra;
+ int i, skip = 0, num = 0, invalid = 1;
+ enum fp_rep rep;
+ enum fp_type fptype;
+ struct stat st;
+
+ fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
+ rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
+
+ 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) {
+ fp = key_fingerprint(public, fptype, rep);
+ ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
+ printf("%u %s %s (%s)\n", key_size(public), fp, comment,
+ key_type(public));
+ if (log_level >= SYSLOG_LEVEL_VERBOSE)
+ printf("%s\n", ra);
+ key_free(public);
+ xfree(comment);
+ xfree(ra);
+ xfree(fp);
+ exit(0);
+ }
+ if (comment) {
+ xfree(comment);
+ comment = NULL;
+ }
+
+ f = fopen(identity_file, "r");
+ if (f != NULL) {
+ while (fgets(line, sizeof(line), f)) {
+ if ((cp = strchr(line, '\n')) == NULL) {
+ error("line %d too long: %.40s...",
+ num + 1, line);
+ skip = 1;
+ continue;
+ }
+ num++;
+ if (skip) {
+ skip = 0;
+ continue;
+ }
+ *cp = '\0';
+
+ /* Skip leading whitespace, empty and comment lines. */
+ for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
+ ;
+ if (!*cp || *cp == '\n' || *cp == '#')
+ 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++) {
+ if (*cp == '\\' && cp[1] == '"')
+ cp++; /* Skip both */
+ else if (*cp == '"')
+ quoted = !quoted;
+ }
+ if (!*cp)
+ continue;
+ *cp++ = '\0';
+ }
+ ep = cp;
+ public = key_new(KEY_RSA1);
+ if (key_read(public, &cp) != 1) {
+ cp = ep;
+ key_free(public);
+ public = key_new(KEY_UNSPEC);
+ if (key_read(public, &cp) != 1) {
+ key_free(public);
+ continue;
+ }
+ }
+ comment = *cp ? cp : comment;
+ fp = key_fingerprint(public, fptype, rep);
+ ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
+ printf("%u %s %s (%s)\n", key_size(public), fp,
+ comment ? comment : "no comment", key_type(public));
+ if (log_level >= SYSLOG_LEVEL_VERBOSE)
+ printf("%s\n", ra);
+ xfree(ra);
+ xfree(fp);
+ key_free(public);
+ invalid = 0;
+ }
+ fclose(f);
+ }
+ if (invalid) {
+ printf("%s is not a public key file.\n", identity_file);
+ exit(1);
+ }
+ exit(0);
+}
+
+static void
+print_host(FILE *f, const char *name, Key *public, int hash)
+{
+ if (print_fingerprint) {
+ enum fp_rep rep;
+ enum fp_type fptype;
+ char *fp, *ra;
+
+ fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
+ rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
+ fp = key_fingerprint(public, fptype, rep);
+ ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART);
+ printf("%u %s %s (%s)\n", key_size(public), fp, name,
+ key_type(public));
+ if (log_level >= SYSLOG_LEVEL_VERBOSE)
+ printf("%s\n", ra);
+ xfree(ra);
+ xfree(fp);
+ } else {
+ 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");
+ }
+}
-void
+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, 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)) {
+ if ((cp = strchr(line, '\n')) == NULL) {
+ error("line %d too long: %.40s...", num + 1, line);
+ skip = 1;
+ invalid = 1;
+ continue;
+ }
+ num++;
+ if (skip) {
+ skip = 0;
+ continue;
+ }
+ *cp = '\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, name, 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_hosts 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.
+ */
+static void
do_change_passphrase(struct passwd *pw)
{
- char buf[1024], *comment;
- char *old_passphrase, *passphrase1, *passphrase2;
- struct stat st;
- RSA *private_key;
-
- /* Read key file name. */
- if (identity_file != NULL) {
- strncpy(buf, identity_file, sizeof(buf));
- buf[sizeof(buf) - 1] = '\0';
- } else {
- printf("Enter file in which the key is ($HOME/%s): ", SSH_CLIENT_IDENTITY);
- fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- exit(1);
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
- if (strcmp(buf, "") == 0)
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
- }
-
- /* Check if the file exists. */
- if (stat(buf, &st) < 0)
- {
- perror(buf);
- exit(1);
- }
-
- /* Try to load the public key from the file the verify that it is
- readable and of the proper format. */
- public_key = RSA_new();
- if (!load_public_key(buf, public_key, NULL))
- {
- printf("%s is not a valid key file.\n", buf);
- exit(1);
- }
- /* Clear the public key since we are just about to load the whole file. */
- RSA_free(public_key);
-
- /* Try to load the file with empty passphrase. */
- private_key = RSA_new();
- if (!load_private_key(buf, "", private_key, &comment)) {
- /* Read passphrase from the user. */
- if (identity_passphrase)
- old_passphrase = xstrdup(identity_passphrase);
- else
- old_passphrase = read_passphrase("Enter old passphrase: ", 1);
- /* Try to load using the passphrase. */
- if (!load_private_key(buf, old_passphrase, private_key, &comment))
- {
- memset(old_passphrase, 0, strlen(old_passphrase));
- xfree(old_passphrase);
- printf("Bad passphrase.\n");
- exit(1);
- }
- /* Destroy the passphrase. */
- memset(old_passphrase, 0, strlen(old_passphrase));
- xfree(old_passphrase);
- }
- printf("Key has comment '%s'\n", comment);
-
- /* Ask the new passphrase (twice). */
- if (identity_new_passphrase)
- {
- passphrase1 = xstrdup(identity_new_passphrase);
- passphrase2 = NULL;
- }
- else
- {
- passphrase1 =
- read_passphrase("Enter new passphrase (empty for no passphrase): ", 1);
- passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
-
- /* Verify that they are the same. */
- if (strcmp(passphrase1, passphrase2) != 0)
- {
- memset(passphrase1, 0, strlen(passphrase1));
- memset(passphrase2, 0, strlen(passphrase2));
- xfree(passphrase1);
- xfree(passphrase2);
- printf("Pass phrases do not match. Try again.\n");
- exit(1);
- }
- /* Destroy the other copy. */
- memset(passphrase2, 0, strlen(passphrase2));
- xfree(passphrase2);
- }
-
- /* Save the file using the new passphrase. */
- if (!save_private_key(buf, passphrase1, private_key, comment))
- {
- printf("Saving the key failed: %s: %s.\n",
- buf, strerror(errno));
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
- RSA_free(private_key);
- xfree(comment);
- exit(1);
- }
- /* Destroy the passphrase and the copy of the key in memory. */
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
- RSA_free(private_key); /* Destroys contents */
- xfree(comment);
-
- printf("Your identification has been saved with the new passphrase.\n");
- exit(0);
+ char *comment;
+ char *old_passphrase, *passphrase1, *passphrase2;
+ struct stat st;
+ Key *private;
+
+ if (!have_identity)
+ ask_filename(pw, "Enter file in which the key is");
+ if (stat(identity_file, &st) < 0) {
+ perror(identity_file);
+ exit(1);
+ }
+ /* Try to load the file with empty passphrase. */
+ private = key_load_private(identity_file, "", &comment);
+ if (private == NULL) {
+ if (identity_passphrase)
+ old_passphrase = xstrdup(identity_passphrase);
+ else
+ old_passphrase =
+ read_passphrase("Enter old passphrase: ",
+ RP_ALLOW_STDIN);
+ private = key_load_private(identity_file, old_passphrase,
+ &comment);
+ memset(old_passphrase, 0, strlen(old_passphrase));
+ xfree(old_passphrase);
+ if (private == NULL) {
+ printf("Bad passphrase.\n");
+ exit(1);
+ }
+ }
+ printf("Key has comment '%s'\n", comment);
+
+ /* Ask the new passphrase (twice). */
+ if (identity_new_passphrase) {
+ passphrase1 = xstrdup(identity_new_passphrase);
+ passphrase2 = NULL;
+ } else {
+ passphrase1 =
+ read_passphrase("Enter new passphrase (empty for no "
+ "passphrase): ", RP_ALLOW_STDIN);
+ passphrase2 = read_passphrase("Enter same passphrase again: ",
+ RP_ALLOW_STDIN);
+
+ /* Verify that they are the same. */
+ if (strcmp(passphrase1, passphrase2) != 0) {
+ memset(passphrase1, 0, strlen(passphrase1));
+ memset(passphrase2, 0, strlen(passphrase2));
+ xfree(passphrase1);
+ xfree(passphrase2);
+ printf("Pass phrases do not match. Try again.\n");
+ exit(1);
+ }
+ /* Destroy the other copy. */
+ memset(passphrase2, 0, strlen(passphrase2));
+ xfree(passphrase2);
+ }
+
+ /* Save the file using the new passphrase. */
+ if (!key_save_private(private, identity_file, passphrase1, comment)) {
+ printf("Saving the key failed: %s.\n", identity_file);
+ memset(passphrase1, 0, strlen(passphrase1));
+ xfree(passphrase1);
+ key_free(private);
+ xfree(comment);
+ exit(1);
+ }
+ /* Destroy the passphrase and the copy of the key in memory. */
+ memset(passphrase1, 0, strlen(passphrase1));
+ xfree(passphrase1);
+ key_free(private); /* Destroys contents */
+ xfree(comment);
+
+ printf("Your identification has been saved with the new passphrase.\n");
+ exit(0);
}
-/* Change the comment of a private key file. */
+/*
+ * 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);
-void
+ printf("failed to read v2 public key from %s.\n", fname);
+ exit(1);
+}
+
+/*
+ * Change the comment of a private key file.
+ */
+static void
do_change_comment(struct passwd *pw)
{
- char buf[1024], new_comment[1024], *comment;
- RSA *private_key;
- char *passphrase;
- struct stat st;
- FILE *f;
- char *tmpbuf;
-
- /* Read key file name. */
- if (identity_file)
- {
- strncpy(buf, identity_file, sizeof(buf));
- buf[sizeof(buf) - 1] = '\0';
- }
- else
- {
- printf("Enter file in which the key is ($HOME/%s): ",
- SSH_CLIENT_IDENTITY);
- fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- exit(1);
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
- if (strcmp(buf, "") == 0)
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
- }
-
- /* Check if the file exists. */
- if (stat(buf, &st) < 0)
- {
- perror(buf);
- exit(1);
- }
-
- /* Try to load the public key from the file the verify that it is
- readable and of the proper format. */
- public_key = RSA_new();
- if (!load_public_key(buf, public_key, NULL))
- {
- printf("%s is not a valid key file.\n", buf);
- exit(1);
- }
-
- private_key = RSA_new();
- /* Try to load the file with empty passphrase. */
- if (load_private_key(buf, "", private_key, &comment))
- passphrase = xstrdup("");
- else
- {
- /* Read passphrase from the user. */
- if (identity_passphrase)
- passphrase = xstrdup(identity_passphrase);
- else
- if (identity_new_passphrase)
- passphrase = xstrdup(identity_new_passphrase);
- else
- passphrase = read_passphrase("Enter passphrase: ", 1);
- /* Try to load using the passphrase. */
- if (!load_private_key(buf, passphrase, private_key, &comment))
- {
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- printf("Bad passphrase.\n");
- exit(1);
- }
- }
- printf("Key now has comment '%s'\n", comment);
-
- if (identity_comment)
- {
- strncpy(new_comment, identity_comment, sizeof(new_comment));
- new_comment[sizeof(new_comment) - 1] = '\0';
- }
- else
- {
- printf("Enter new comment: ");
- fflush(stdout);
- if (!fgets(new_comment, sizeof(new_comment), stdin))
- {
- memset(passphrase, 0, strlen(passphrase));
- RSA_free(private_key);
- exit(1);
- }
-
- /* Remove terminating newline from comment. */
- if (strchr(new_comment, '\n'))
- *strchr(new_comment, '\n') = 0;
- }
-
- /* Save the file using the new passphrase. */
- if (!save_private_key(buf, passphrase, private_key, new_comment))
- {
- printf("Saving the key failed: %s: %s.\n",
- buf, strerror(errno));
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- RSA_free(private_key);
- xfree(comment);
- exit(1);
- }
-
- /* Destroy the passphrase and the private key in memory. */
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- RSA_free(private_key);
-
- /* Save the public key in text format in a file with the same name but
- .pub appended. */
- strcat(buf, ".pub");
- f = fopen(buf, "w");
- if (!f)
- {
- printf("Could not save your public key in %s\n", buf);
- exit(1);
- }
- fprintf(f, "%d ", BN_num_bits(public_key->n));
- tmpbuf = BN_bn2dec(public_key->e);
- fprintf(f, "%s ", tmpbuf);
- free (tmpbuf);
- tmpbuf = BN_bn2dec(public_key->n);
- fprintf(f, "%s %s\n", tmpbuf, new_comment);
- free (tmpbuf);
- fclose(f);
-
- xfree(comment);
-
- printf("The comment in your key file has been changed.\n");
- exit(0);
+ char new_comment[1024], *comment, *passphrase;
+ Key *private;
+ Key *public;
+ struct stat st;
+ FILE *f;
+ int fd;
+
+ if (!have_identity)
+ ask_filename(pw, "Enter file in which the key is");
+ if (stat(identity_file, &st) < 0) {
+ perror(identity_file);
+ exit(1);
+ }
+ private = key_load_private(identity_file, "", &comment);
+ if (private == NULL) {
+ if (identity_passphrase)
+ passphrase = xstrdup(identity_passphrase);
+ else if (identity_new_passphrase)
+ passphrase = xstrdup(identity_new_passphrase);
+ else
+ passphrase = read_passphrase("Enter passphrase: ",
+ RP_ALLOW_STDIN);
+ /* Try to load using the passphrase. */
+ private = key_load_private(identity_file, passphrase, &comment);
+ if (private == NULL) {
+ memset(passphrase, 0, strlen(passphrase));
+ xfree(passphrase);
+ printf("Bad passphrase.\n");
+ exit(1);
+ }
+ } else {
+ passphrase = xstrdup("");
+ }
+ if (private->type != KEY_RSA1) {
+ fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
+ key_free(private);
+ exit(1);
+ }
+ printf("Key now has comment '%s'\n", comment);
+
+ if (identity_comment) {
+ strlcpy(new_comment, identity_comment, sizeof(new_comment));
+ } else {
+ printf("Enter new comment: ");
+ fflush(stdout);
+ if (!fgets(new_comment, sizeof(new_comment), stdin)) {
+ memset(passphrase, 0, strlen(passphrase));
+ key_free(private);
+ exit(1);
+ }
+ new_comment[strcspn(new_comment, "\n")] = '\0';
+ }
+
+ /* Save the file using the new passphrase. */
+ if (!key_save_private(private, identity_file, passphrase, new_comment)) {
+ printf("Saving the key failed: %s.\n", identity_file);
+ memset(passphrase, 0, strlen(passphrase));
+ xfree(passphrase);
+ key_free(private);
+ xfree(comment);
+ exit(1);
+ }
+ memset(passphrase, 0, strlen(passphrase));
+ xfree(passphrase);
+ public = key_from_private(private);
+ key_free(private);
+
+ strlcat(identity_file, ".pub", sizeof(identity_file));
+ fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+ if (fd == -1) {
+ printf("Could not save your public key in %s\n", identity_file);
+ exit(1);
+ }
+ f = fdopen(fd, "w");
+ if (f == NULL) {
+ printf("fdopen %s failed\n", identity_file);
+ exit(1);
+ }
+ if (!key_write(public, f))
+ fprintf(stderr, "write key failed\n");
+ key_free(public);
+ fprintf(f, " %s\n", new_comment);
+ fclose(f);
+
+ xfree(comment);
+
+ printf("The comment in your key file has been changed.\n");
+ exit(0);
}
-/* Main program for key management. */
+static void
+usage(void)
+{
+ 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");
+#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, " -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, " -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");
+#ifdef SMARTCARD
+ 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 buf[16384], buf2[1024], *passphrase1, *passphrase2;
- struct passwd *pw;
- char *tmpbuf;
- int opt;
- struct stat st;
- FILE *f;
- char hostname[MAXHOSTNAMELEN];
- extern int optind;
- extern char *optarg;
-
- /* check if RSA support exists */
- if (rsa_alive() == 0) {
-
- fprintf(stderr,
- "%s: no RSA support in libssl and libcrypto. See ssl(8).\n",
- __progname);
- exit(1);
- }
-
- /* Get user\'s passwd structure. We need this for the home directory. */
- pw = getpwuid(getuid());
- if (!pw)
- {
- printf("You don't exist, go away!\n");
- exit(1);
- }
-
- /* Create ~/.ssh directory if it doesn\'t already exist. */
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_USER_DIR);
- if (stat(buf, &st) < 0)
- if (mkdir(buf, 0755) < 0)
- error("Could not create directory '%s'.", buf);
-
- /* Parse command line arguments. */
- while ((opt = getopt(ac, av, "qpcb:f:P:N:C:")) != EOF)
- {
- switch (opt)
- {
- case 'b':
- bits = atoi(optarg);
- if (bits < 512 || bits > 32768)
- {
- printf("Bits has bad value.\n");
- exit(1);
- }
- break;
-
- case 'p':
- change_passphrase = 1;
- break;
-
- case 'c':
- change_comment = 1;
- break;
-
- case 'f':
- identity_file = optarg;
- break;
-
- case 'P':
- identity_passphrase = optarg;
- break;
-
- case 'N':
- identity_new_passphrase = optarg;
- break;
-
- case 'C':
- identity_comment = optarg;
- break;
-
- case 'q':
- quiet = 1;
- break;
-
- case '?':
- default:
- printf("ssh-keygen version %s\n", SSH_VERSION);
- printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", av[0]);
- exit(1);
- }
- }
- if (optind < ac)
- {
- printf("Too many arguments.\n");
- exit(1);
- }
- if (change_passphrase && change_comment)
- {
- printf("Can only have one of -p and -c.\n");
- exit(1);
- }
-
- /* If the user requested to change the passphrase, do it now. This
- function never returns. */
- if (change_passphrase)
- do_change_passphrase(pw);
-
- /* If the user requested to change the comment, do it now. This function
- never returns. */
- if (change_comment)
- do_change_comment(pw);
-
- arc4random_stir();
-
- if (quiet)
- rsa_set_verbose(0);
-
- /* Generate the rsa key pair. */
- private_key = RSA_new();
- public_key = RSA_new();
- rsa_generate_key(private_key, public_key, bits);
-
- ask_file_again:
-
- /* Ask for a file to save the key in. */
- if (identity_file)
- {
- strncpy(buf, identity_file, sizeof(buf));
- buf[sizeof(buf) - 1] = '\0';
- }
- else
- {
- printf("Enter file in which to save the key ($HOME/%s): ",
- SSH_CLIENT_IDENTITY);
- fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- exit(1);
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
- if (strcmp(buf, "") == 0)
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY);
- }
-
- /* If the file aready exists, ask the user to confirm. */
- if (stat(buf, &st) >= 0)
- {
- printf("%s already exists.\n", buf);
- printf("Overwrite (y/n)? ");
- fflush(stdout);
- if (fgets(buf2, sizeof(buf2), stdin) == NULL)
- exit(1);
- if (buf2[0] != 'y' && buf2[0] != 'Y')
- exit(1);
- }
-
- /* Ask for a passphrase (twice). */
- if (identity_passphrase)
- passphrase1 = xstrdup(identity_passphrase);
- else
- if (identity_new_passphrase)
- passphrase1 = xstrdup(identity_new_passphrase);
- else
- {
- passphrase_again:
- passphrase1 =
- read_passphrase("Enter passphrase (empty for no passphrase): ", 1);
- passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
- if (strcmp(passphrase1, passphrase2) != 0)
- {
- /* The passphrases do not match. Clear them and retry. */
- memset(passphrase1, 0, strlen(passphrase1));
- memset(passphrase2, 0, strlen(passphrase2));
- xfree(passphrase1);
- xfree(passphrase2);
- printf("Passphrases do not match. Try again.\n");
- goto passphrase_again;
- }
- /* Clear the other copy of the passphrase. */
- memset(passphrase2, 0, strlen(passphrase2));
- xfree(passphrase2);
- }
-
- /* Create default commend field for the passphrase. The user can later
- edit this field. */
- if (identity_comment)
- {
- strlcpy(buf2, identity_comment, sizeof(buf2));
- }
- else
- {
- if (gethostname(hostname, sizeof(hostname)) < 0)
- {
- perror("gethostname");
- exit(1);
- }
- snprintf(buf2, sizeof buf2, "%s@%s", pw->pw_name, hostname);
- }
-
- /* Save the key with the given passphrase and comment. */
- if (!save_private_key(buf, passphrase1, private_key, buf2))
- {
- printf("Saving the key failed: %s: %s.\n",
- buf, strerror(errno));
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
- goto ask_file_again;
- }
- /* Clear the passphrase. */
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
-
- /* Clear the private key and the random number generator. */
- RSA_free(private_key);
- arc4random_stir();
-
- if (!quiet)
- printf("Your identification has been saved in %s.\n", buf);
-
- /* Display the public key on the screen. */
- if (!quiet) {
- printf("Your public key is:\n");
- printf("%d ", BN_num_bits(public_key->n));
- tmpbuf = BN_bn2dec(public_key->e);
- printf("%s ", tmpbuf);
- free(tmpbuf);
- tmpbuf = BN_bn2dec(public_key->n);
- printf("%s %s\n", tmpbuf, buf2);
- free(tmpbuf);
- }
-
- /* Save the public key in text format in a file with the same name but
- .pub appended. */
- strcat(buf, ".pub");
- f = fopen(buf, "w");
- if (!f)
- {
- printf("Could not save your public key in %s\n", buf);
- exit(1);
- }
- fprintf(f, "%d ", BN_num_bits(public_key->n));
- tmpbuf = BN_bn2dec(public_key->e);
- fprintf(f, "%s ", tmpbuf);
- free(tmpbuf);
- tmpbuf = BN_bn2dec(public_key->n);
- fprintf(f, "%s %s\n", tmpbuf, buf2);
- free(tmpbuf);
- fclose(f);
-
- if (!quiet)
- printf("Your public key has been saved in %s\n", buf);
-
- exit(0);
+ char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
+ 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;
+ BIGNUM *start = NULL;
+ FILE *f;
+ const char *errstr;
+
+ extern int optind;
+ extern char *optarg;
+
+ /* 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());
+ if (!pw) {
+ printf("You don't exist, go away!\n");
+ exit(1);
+ }
+ if (gethostname(hostname, sizeof(hostname)) < 0) {
+ perror("gethostname");
+ exit(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 = (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;
+ break;
+ case 'B':
+ print_bubblebabble = 1;
+ break;
+ case 'p':
+ change_passphrase = 1;
+ break;
+ case 'c':
+ change_comment = 1;
+ break;
+ case 'f':
+ 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 'N':
+ identity_new_passphrase = optarg;
+ break;
+ case 'C':
+ identity_comment = optarg;
+ break;
+ case 'q':
+ quiet = 1;
+ break;
+ case 'e':
+ case 'x':
+ /* export key */
+ convert_to_ssh2 = 1;
+ break;
+ case 'i':
+ case 'X':
+ /* import key */
+ convert_from_ssh2 = 1;
+ break;
+ case 'y':
+ print_public = 1;
+ break;
+ case 'd':
+ key_type_name = "dsa";
+ break;
+ case 't':
+ key_type_name = optarg;
+ 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();
+ }
+ }
+
+ /* reinit */
+ log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
+
+ if (optind < argc) {
+ printf("Too many arguments.\n");
+ usage();
+ }
+ if (change_passphrase && change_comment) {
+ printf("Can only have one of -p and -c.\n");
+ usage();
+ }
+ if (print_fingerprint && (delete_host || hash_hosts)) {
+ printf("Cannot use -l with -D or -R.\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_change_passphrase(pw);
+ if (change_comment)
+ do_change_comment(pw);
+ if (convert_to_ssh2)
+ do_convert_to_ssh2(pw);
+ if (convert_from_ssh2)
+ 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)
+ do_download(pw, reader_id);
+ else
+ do_upload(pw, reader_id);
+#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 (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 (private == NULL) {
+ fprintf(stderr, "key_generate failed\n");
+ exit(1);
+ }
+ public = key_from_private(private);
+
+ if (!have_identity)
+ ask_filename(pw, "Enter file in which to save the key");
+
+ /* 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) {
+ if (mkdir(dotsshdir, 0700) < 0)
+ error("Could not create directory '%s'.", dotsshdir);
+ else if (!quiet)
+ printf("Created directory '%s'.\n", dotsshdir);
+ }
+ /* If the file already exists, ask the user to confirm. */
+ if (stat(identity_file, &st) >= 0) {
+ char yesno[3];
+ printf("%s already exists.\n", identity_file);
+ printf("Overwrite (y/n)? ");
+ fflush(stdout);
+ if (fgets(yesno, sizeof(yesno), stdin) == NULL)
+ exit(1);
+ if (yesno[0] != 'y' && yesno[0] != 'Y')
+ exit(1);
+ }
+ /* Ask for a passphrase (twice). */
+ if (identity_passphrase)
+ passphrase1 = xstrdup(identity_passphrase);
+ else if (identity_new_passphrase)
+ passphrase1 = xstrdup(identity_new_passphrase);
+ else {
+passphrase_again:
+ passphrase1 =
+ read_passphrase("Enter passphrase (empty for no "
+ "passphrase): ", RP_ALLOW_STDIN);
+ passphrase2 = read_passphrase("Enter same passphrase again: ",
+ RP_ALLOW_STDIN);
+ if (strcmp(passphrase1, passphrase2) != 0) {
+ /*
+ * The passphrases do not match. Clear them and
+ * retry.
+ */
+ memset(passphrase1, 0, strlen(passphrase1));
+ memset(passphrase2, 0, strlen(passphrase2));
+ xfree(passphrase1);
+ xfree(passphrase2);
+ printf("Passphrases do not match. Try again.\n");
+ goto passphrase_again;
+ }
+ /* Clear the other copy of the passphrase. */
+ memset(passphrase2, 0, strlen(passphrase2));
+ xfree(passphrase2);
+ }
+
+ if (identity_comment) {
+ strlcpy(comment, identity_comment, sizeof(comment));
+ } else {
+ /* Create default comment field for the passphrase. */
+ snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
+ }
+
+ /* Save the key with the given passphrase and comment. */
+ if (!key_save_private(private, identity_file, passphrase1, comment)) {
+ printf("Saving the key failed: %s.\n", identity_file);
+ memset(passphrase1, 0, strlen(passphrase1));
+ xfree(passphrase1);
+ exit(1);
+ }
+ /* Clear the passphrase. */
+ memset(passphrase1, 0, strlen(passphrase1));
+ xfree(passphrase1);
+
+ /* Clear the private key and the random number generator. */
+ key_free(private);
+ arc4random_stir();
+
+ if (!quiet)
+ printf("Your identification has been saved in %s.\n", identity_file);
+
+ strlcat(identity_file, ".pub", sizeof(identity_file));
+ fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
+ if (fd == -1) {
+ printf("Could not save your public key in %s\n", identity_file);
+ exit(1);
+ }
+ f = fdopen(fd, "w");
+ if (f == NULL) {
+ printf("fdopen %s failed\n", identity_file);
+ exit(1);
+ }
+ if (!key_write(public, f))
+ fprintf(stderr, "write key failed\n");
+ fprintf(f, " %s\n", comment);
+ fclose(f);
+
+ if (!quiet) {
+ char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
+ char *ra = key_fingerprint(public, SSH_FP_MD5,
+ SSH_FP_RANDOMART);
+ printf("Your public key has been saved in %s.\n",
+ identity_file);
+ printf("The key fingerprint is:\n");
+ printf("%s %s\n", fp, comment);
+ printf("The key's randomart image is:\n");
+ printf("%s\n", ra);
+ xfree(ra);
+ xfree(fp);
+ }
+
+ key_free(public);
+ exit(0);
}
andersk / openssh.git / blobdiff