blob: 04a9b939ad5db5457a4e4a558e78ddb59ec1b206 [file] [log] [blame]
Darren Tucker82a3d2b2007-02-19 22:10:25 +11001/* $OpenBSD: ssh-keygen.c,v 1.160 2007/01/21 01:41:54 stevesk Exp $ */
Damien Millerd4a8b7e1999-10-27 13:42:43 +10002/*
Damien Miller95def091999-11-25 00:26:21 +11003 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11006 * Identity and host key generation and maintenance.
Damien Millere4340be2000-09-16 13:29:08 +11007 *
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose. Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
Damien Miller95def091999-11-25 00:26:21 +110013 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100014
15#include "includes.h"
Damien Millerf17883e2006-03-15 11:45:54 +110016
17#include <sys/types.h>
Damien Millere3b60b52006-07-10 21:08:03 +100018#include <sys/socket.h>
Damien Millerf17883e2006-03-15 11:45:54 +110019#include <sys/stat.h>
Damien Miller8dbffe72006-08-05 11:02:17 +100020#include <sys/param.h>
Damien Millerd4a8b7e1999-10-27 13:42:43 +100021
Damien Millereba71ba2000-04-29 23:57:08 +100022#include <openssl/evp.h>
23#include <openssl/pem.h>
Damien Millereba71ba2000-04-29 23:57:08 +100024
Darren Tucker39972492006-07-12 22:22:46 +100025#include <errno.h>
Damien Miller57cf6382006-07-10 21:13:46 +100026#include <fcntl.h>
Damien Millerb8fe89c2006-07-24 14:51:00 +100027#include <netdb.h>
Darren Tucker2ee50c52006-07-11 18:55:05 +100028#ifdef HAVE_PATHS_H
29# include <paths.h>
30#endif
Damien Miller9f2abc42006-07-10 20:53:08 +100031#include <pwd.h>
Damien Millerded319c2006-09-01 15:38:36 +100032#include <stdarg.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100033#include <stdio.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100034#include <stdlib.h>
Damien Millere3476ed2006-07-24 14:13:33 +100035#include <string.h>
Damien Millere6b3b612006-07-24 14:01:23 +100036#include <unistd.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100037
Damien Millerd4a8b7e1999-10-27 13:42:43 +100038#include "xmalloc.h"
Damien Millereba71ba2000-04-29 23:57:08 +100039#include "key.h"
Ben Lindstromd09fcf52001-03-29 00:29:54 +000040#include "rsa.h"
Damien Millereba71ba2000-04-29 23:57:08 +100041#include "authfile.h"
42#include "uuencode.h"
Damien Miller874d77b2000-10-14 16:23:11 +110043#include "buffer.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000044#include "pathnames.h"
45#include "log.h"
Darren Tuckere608ca22004-05-13 16:15:47 +100046#include "misc.h"
Damien Miller4b42d7f2005-03-01 21:48:35 +110047#include "match.h"
48#include "hostfile.h"
Damien Miller69996102006-07-10 20:53:31 +100049#include "dns.h"
Damien Miller874d77b2000-10-14 16:23:11 +110050
Ben Lindstrom8282d6a2001-08-06 21:44:05 +000051#ifdef SMARTCARD
Ben Lindstrom8282d6a2001-08-06 21:44:05 +000052#include "scard.h"
Ben Lindstrombcc18082001-08-06 21:59:25 +000053#endif
Ben Lindstromcd392282001-07-04 03:44:03 +000054
Damien Miller3f54a9f2005-11-05 14:52:18 +110055/* Number of bits in the RSA/DSA key. This value can be set on the command line. */
56#define DEFAULT_BITS 2048
57#define DEFAULT_BITS_DSA 1024
58u_int32_t bits = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100059
Damien Miller5428f641999-11-25 11:54:57 +110060/*
61 * Flag indicating that we just want to change the passphrase. This can be
62 * set on the command line.
63 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100064int change_passphrase = 0;
65
Damien Miller5428f641999-11-25 11:54:57 +110066/*
67 * Flag indicating that we just want to change the comment. This can be set
68 * on the command line.
69 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100070int change_comment = 0;
71
72int quiet = 0;
73
Damien Miller4b42d7f2005-03-01 21:48:35 +110074/* Flag indicating that we want to hash a known_hosts file */
75int hash_hosts = 0;
76/* Flag indicating that we want lookup a host in known_hosts file */
77int find_host = 0;
78/* Flag indicating that we want to delete a host from a known_hosts file */
79int delete_host = 0;
80
Damien Miller10f6f6b1999-11-17 17:29:08 +110081/* Flag indicating that we just want to see the key fingerprint */
82int print_fingerprint = 0;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +000083int print_bubblebabble = 0;
Damien Miller10f6f6b1999-11-17 17:29:08 +110084
Damien Miller431f66b1999-11-21 18:31:57 +110085/* The identity file name, given on the command line or entered by the user. */
86char identity_file[1024];
87int have_identity = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100088
89/* This is set to the passphrase if given on the command line. */
90char *identity_passphrase = NULL;
91
92/* This is set to the new passphrase if given on the command line. */
93char *identity_new_passphrase = NULL;
94
95/* This is set to the new comment if given on the command line. */
96char *identity_comment = NULL;
97
Damien Millereba71ba2000-04-29 23:57:08 +100098/* Dump public key file in format used by real and the original SSH 2 */
99int convert_to_ssh2 = 0;
100int convert_from_ssh2 = 0;
101int print_public = 0;
Damien Miller37876e92003-05-15 10:19:46 +1000102int print_generic = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100103
Damien Millera41c8b12002-01-22 23:05:08 +1100104char *key_type_name = NULL;
Damien Millereba71ba2000-04-29 23:57:08 +1000105
Damien Miller431f66b1999-11-21 18:31:57 +1100106/* argv0 */
107extern char *__progname;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000108
Damien Millereba71ba2000-04-29 23:57:08 +1000109char hostname[MAXHOSTNAMELEN];
110
Darren Tucker770fc012004-05-13 16:24:32 +1000111/* moduli.c */
Damien Millerb089fb52005-05-26 12:16:18 +1000112int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
Darren Tucker770fc012004-05-13 16:24:32 +1000113int prime_test(FILE *, FILE *, u_int32_t, u_int32_t);
114
Ben Lindstrombba81212001-06-25 05:01:22 +0000115static void
Damien Miller431f66b1999-11-21 18:31:57 +1100116ask_filename(struct passwd *pw, const char *prompt)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000117{
Damien Miller95def091999-11-25 00:26:21 +1100118 char buf[1024];
Damien Millere39cacc2000-11-29 12:18:44 +1100119 char *name = NULL;
120
Damien Miller993dd552002-02-19 15:22:47 +1100121 if (key_type_name == NULL)
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000122 name = _PATH_SSH_CLIENT_ID_RSA;
Damien Miller90967402006-03-26 14:07:26 +1100123 else {
Damien Miller993dd552002-02-19 15:22:47 +1100124 switch (key_type_from_name(key_type_name)) {
125 case KEY_RSA1:
126 name = _PATH_SSH_CLIENT_IDENTITY;
127 break;
128 case KEY_DSA:
129 name = _PATH_SSH_CLIENT_ID_DSA;
130 break;
131 case KEY_RSA:
132 name = _PATH_SSH_CLIENT_ID_RSA;
133 break;
134 default:
135 fprintf(stderr, "bad key type");
136 exit(1);
137 break;
138 }
Damien Miller90967402006-03-26 14:07:26 +1100139 }
Damien Millere39cacc2000-11-29 12:18:44 +1100140 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
Ben Lindstrom3deda8b2000-12-22 20:27:43 +0000141 fprintf(stderr, "%s (%s): ", prompt, identity_file);
Damien Miller95def091999-11-25 00:26:21 +1100142 if (fgets(buf, sizeof(buf), stdin) == NULL)
143 exit(1);
144 if (strchr(buf, '\n'))
145 *strchr(buf, '\n') = 0;
146 if (strcmp(buf, "") != 0)
147 strlcpy(identity_file, buf, sizeof(identity_file));
148 have_identity = 1;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100149}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000150
Ben Lindstrombba81212001-06-25 05:01:22 +0000151static Key *
Ben Lindstromd78ae762001-06-05 20:35:09 +0000152load_identity(char *filename)
Damien Millereba71ba2000-04-29 23:57:08 +1000153{
Ben Lindstromd0fca422001-03-26 13:44:06 +0000154 char *pass;
155 Key *prv;
156
Ben Lindstroma3700052001-04-05 23:26:32 +0000157 prv = key_load_private(filename, "", NULL);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000158 if (prv == NULL) {
Ben Lindstromd78ae762001-06-05 20:35:09 +0000159 if (identity_passphrase)
160 pass = xstrdup(identity_passphrase);
161 else
Ben Lindstrom949974b2001-06-25 05:20:31 +0000162 pass = read_passphrase("Enter passphrase: ",
163 RP_ALLOW_STDIN);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000164 prv = key_load_private(filename, pass, NULL);
Damien Millereba71ba2000-04-29 23:57:08 +1000165 memset(pass, 0, strlen(pass));
166 xfree(pass);
167 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000168 return prv;
Damien Millereba71ba2000-04-29 23:57:08 +1000169}
170
Damien Miller874d77b2000-10-14 16:23:11 +1100171#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000172#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
Damien Miller874d77b2000-10-14 16:23:11 +1100173#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
Kevin Stevesef4eea92001-02-05 12:42:17 +0000174#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
Damien Millereba71ba2000-04-29 23:57:08 +1000175
Ben Lindstrombba81212001-06-25 05:01:22 +0000176static void
Damien Millereba71ba2000-04-29 23:57:08 +1000177do_convert_to_ssh2(struct passwd *pw)
178{
Ben Lindstrom46c264f2001-04-24 16:56:58 +0000179 Key *k;
Ben Lindstromc58ab022002-02-26 18:15:09 +0000180 u_int len;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000181 u_char *blob;
Damien Millereba71ba2000-04-29 23:57:08 +1000182 struct stat st;
183
184 if (!have_identity)
185 ask_filename(pw, "Enter file in which the key is");
186 if (stat(identity_file, &st) < 0) {
187 perror(identity_file);
188 exit(1);
189 }
Ben Lindstrom46c264f2001-04-24 16:56:58 +0000190 if ((k = key_load_public(identity_file, NULL)) == NULL) {
Ben Lindstromd78ae762001-06-05 20:35:09 +0000191 if ((k = load_identity(identity_file)) == NULL) {
Ben Lindstrom46c264f2001-04-24 16:56:58 +0000192 fprintf(stderr, "load failed\n");
193 exit(1);
194 }
Damien Millereba71ba2000-04-29 23:57:08 +1000195 }
Damien Millerdb274722003-05-14 13:45:22 +1000196 if (k->type == KEY_RSA1) {
197 fprintf(stderr, "version 1 keys are not supported\n");
198 exit(1);
199 }
Ben Lindstrom99a30f12001-09-18 05:49:14 +0000200 if (key_to_blob(k, &blob, &len) <= 0) {
201 fprintf(stderr, "key_to_blob failed\n");
202 exit(1);
203 }
Damien Miller874d77b2000-10-14 16:23:11 +1100204 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
Damien Millereba71ba2000-04-29 23:57:08 +1000205 fprintf(stdout,
Ben Lindstrom58d3b722002-06-23 21:28:13 +0000206 "Comment: \"%u-bit %s, converted from OpenSSH by %s@%s\"\n",
Ben Lindstrom46c264f2001-04-24 16:56:58 +0000207 key_size(k), key_type(k),
Damien Millereba71ba2000-04-29 23:57:08 +1000208 pw->pw_name, hostname);
209 dump_base64(stdout, blob, len);
Damien Miller874d77b2000-10-14 16:23:11 +1100210 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
Ben Lindstrom46c264f2001-04-24 16:56:58 +0000211 key_free(k);
Damien Millereba71ba2000-04-29 23:57:08 +1000212 xfree(blob);
213 exit(0);
214}
215
Ben Lindstrombba81212001-06-25 05:01:22 +0000216static void
Damien Miller874d77b2000-10-14 16:23:11 +1100217buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
218{
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000219 u_int bignum_bits = buffer_get_int(b);
220 u_int bytes = (bignum_bits + 7) / 8;
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000221
Damien Miller874d77b2000-10-14 16:23:11 +1100222 if (buffer_len(b) < bytes)
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000223 fatal("buffer_get_bignum_bits: input buffer too small: "
224 "need %d have %d", bytes, buffer_len(b));
Darren Tucker0bc85572006-11-07 23:14:41 +1100225 if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL)
226 fatal("buffer_get_bignum_bits: BN_bin2bn failed");
Damien Miller874d77b2000-10-14 16:23:11 +1100227 buffer_consume(b, bytes);
228}
229
Ben Lindstrombba81212001-06-25 05:01:22 +0000230static Key *
Ben Lindstrom90fd8142002-02-26 18:09:42 +0000231do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
Damien Miller874d77b2000-10-14 16:23:11 +1100232{
233 Buffer b;
Damien Miller874d77b2000-10-14 16:23:11 +1100234 Key *key = NULL;
Damien Miller874d77b2000-10-14 16:23:11 +1100235 char *type, *cipher;
Ben Lindstrom511d69e2001-07-04 05:05:27 +0000236 u_char *sig, data[] = "abcde12345";
Ben Lindstrome586c4c2001-06-25 05:04:58 +0000237 int magic, rlen, ktype, i1, i2, i3, i4;
238 u_int slen;
239 u_long e;
Damien Miller874d77b2000-10-14 16:23:11 +1100240
241 buffer_init(&b);
242 buffer_append(&b, blob, blen);
243
Darren Tucker82a3d2b2007-02-19 22:10:25 +1100244 magic = buffer_get_int(&b);
Damien Miller874d77b2000-10-14 16:23:11 +1100245 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
246 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
247 buffer_free(&b);
248 return NULL;
249 }
Ben Lindstrom34f91882001-06-25 04:47:54 +0000250 i1 = buffer_get_int(&b);
Damien Miller874d77b2000-10-14 16:23:11 +1100251 type = buffer_get_string(&b, NULL);
252 cipher = buffer_get_string(&b, NULL);
Ben Lindstrom34f91882001-06-25 04:47:54 +0000253 i2 = buffer_get_int(&b);
254 i3 = buffer_get_int(&b);
255 i4 = buffer_get_int(&b);
Damien Miller80163902007-01-05 16:30:16 +1100256 debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
Damien Miller874d77b2000-10-14 16:23:11 +1100257 if (strcmp(cipher, "none") != 0) {
258 error("unsupported cipher %s", cipher);
259 xfree(cipher);
260 buffer_free(&b);
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000261 xfree(type);
Damien Miller874d77b2000-10-14 16:23:11 +1100262 return NULL;
263 }
264 xfree(cipher);
265
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000266 if (strstr(type, "dsa")) {
267 ktype = KEY_DSA;
268 } else if (strstr(type, "rsa")) {
269 ktype = KEY_RSA;
270 } else {
Darren Tucker7cfeecf2005-01-20 10:56:31 +1100271 buffer_free(&b);
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000272 xfree(type);
Damien Miller874d77b2000-10-14 16:23:11 +1100273 return NULL;
274 }
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000275 key = key_new_private(ktype);
276 xfree(type);
277
278 switch (key->type) {
279 case KEY_DSA:
280 buffer_get_bignum_bits(&b, key->dsa->p);
281 buffer_get_bignum_bits(&b, key->dsa->g);
282 buffer_get_bignum_bits(&b, key->dsa->q);
283 buffer_get_bignum_bits(&b, key->dsa->pub_key);
284 buffer_get_bignum_bits(&b, key->dsa->priv_key);
285 break;
286 case KEY_RSA:
Darren Tucker82a3d2b2007-02-19 22:10:25 +1100287 e = buffer_get_char(&b);
Ben Lindstrom34f91882001-06-25 04:47:54 +0000288 debug("e %lx", e);
289 if (e < 30) {
290 e <<= 8;
291 e += buffer_get_char(&b);
292 debug("e %lx", e);
293 e <<= 8;
294 e += buffer_get_char(&b);
295 debug("e %lx", e);
296 }
297 if (!BN_set_word(key->rsa->e, e)) {
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000298 buffer_free(&b);
299 key_free(key);
300 return NULL;
301 }
302 buffer_get_bignum_bits(&b, key->rsa->d);
303 buffer_get_bignum_bits(&b, key->rsa->n);
304 buffer_get_bignum_bits(&b, key->rsa->iqmp);
305 buffer_get_bignum_bits(&b, key->rsa->q);
306 buffer_get_bignum_bits(&b, key->rsa->p);
Ben Lindstromf7297dd2001-07-04 05:02:23 +0000307 rsa_generate_additional_parameters(key->rsa);
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000308 break;
309 }
Damien Miller874d77b2000-10-14 16:23:11 +1100310 rlen = buffer_len(&b);
Ben Lindstrom1c37c6a2001-12-06 18:00:18 +0000311 if (rlen != 0)
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000312 error("do_convert_private_ssh2_from_blob: "
313 "remaining bytes in key blob %d", rlen);
Damien Miller874d77b2000-10-14 16:23:11 +1100314 buffer_free(&b);
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000315
Ben Lindstrome586c4c2001-06-25 05:04:58 +0000316 /* try the key */
317 key_sign(key, &sig, &slen, data, sizeof(data));
318 key_verify(key, sig, slen, data, sizeof(data));
319 xfree(sig);
Damien Miller874d77b2000-10-14 16:23:11 +1100320 return key;
321}
322
Damien Miller8056a9d2006-03-15 12:05:40 +1100323static int
324get_line(FILE *fp, char *line, size_t len)
325{
326 int c;
327 size_t pos = 0;
328
329 line[0] = '\0';
330 while ((c = fgetc(fp)) != EOF) {
331 if (pos >= len - 1) {
332 fprintf(stderr, "input line too long.\n");
333 exit(1);
334 }
Damien Miller90967402006-03-26 14:07:26 +1100335 switch (c) {
Damien Miller8056a9d2006-03-15 12:05:40 +1100336 case '\r':
337 c = fgetc(fp);
338 if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) {
339 fprintf(stderr, "unget: %s\n", strerror(errno));
340 exit(1);
341 }
342 return pos;
343 case '\n':
344 return pos;
345 }
346 line[pos++] = c;
347 line[pos] = '\0';
348 }
Damien Miller6c7439f2007-01-05 16:29:55 +1100349 /* We reached EOF */
350 return -1;
Damien Miller8056a9d2006-03-15 12:05:40 +1100351}
352
Ben Lindstrombba81212001-06-25 05:01:22 +0000353static void
Damien Millereba71ba2000-04-29 23:57:08 +1000354do_convert_from_ssh2(struct passwd *pw)
355{
356 Key *k;
357 int blen;
Ben Lindstrom155b9812002-04-02 20:26:26 +0000358 u_int len;
Damien Miller8056a9d2006-03-15 12:05:40 +1100359 char line[1024];
Ben Lindstrom9e0ddd42001-09-18 05:41:19 +0000360 u_char blob[8096];
Damien Millereba71ba2000-04-29 23:57:08 +1000361 char encoded[8096];
362 struct stat st;
Damien Miller874d77b2000-10-14 16:23:11 +1100363 int escaped = 0, private = 0, ok;
Damien Millereba71ba2000-04-29 23:57:08 +1000364 FILE *fp;
365
366 if (!have_identity)
367 ask_filename(pw, "Enter file in which the key is");
368 if (stat(identity_file, &st) < 0) {
369 perror(identity_file);
370 exit(1);
371 }
372 fp = fopen(identity_file, "r");
373 if (fp == NULL) {
374 perror(identity_file);
375 exit(1);
376 }
377 encoded[0] = '\0';
Damien Miller8056a9d2006-03-15 12:05:40 +1100378 while ((blen = get_line(fp, line, sizeof(line))) != -1) {
379 if (line[blen - 1] == '\\')
Damien Miller30c3d422000-05-09 11:02:59 +1000380 escaped++;
Damien Millereba71ba2000-04-29 23:57:08 +1000381 if (strncmp(line, "----", 4) == 0 ||
382 strstr(line, ": ") != NULL) {
Damien Miller874d77b2000-10-14 16:23:11 +1100383 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
384 private = 1;
Ben Lindstrome586c4c2001-06-25 05:04:58 +0000385 if (strstr(line, " END ") != NULL) {
386 break;
387 }
Ben Lindstrom30358602001-04-24 16:59:28 +0000388 /* fprintf(stderr, "ignore: %s", line); */
Damien Millereba71ba2000-04-29 23:57:08 +1000389 continue;
390 }
Damien Miller30c3d422000-05-09 11:02:59 +1000391 if (escaped) {
392 escaped--;
Ben Lindstrom30358602001-04-24 16:59:28 +0000393 /* fprintf(stderr, "escaped: %s", line); */
Damien Miller30c3d422000-05-09 11:02:59 +1000394 continue;
Damien Millereba71ba2000-04-29 23:57:08 +1000395 }
Damien Millereba71ba2000-04-29 23:57:08 +1000396 strlcat(encoded, line, sizeof(encoded));
397 }
Ben Lindstrom155b9812002-04-02 20:26:26 +0000398 len = strlen(encoded);
399 if (((len % 4) == 3) &&
400 (encoded[len-1] == '=') &&
401 (encoded[len-2] == '=') &&
402 (encoded[len-3] == '='))
403 encoded[len-3] = '\0';
Damien Miller4a8ed542002-01-22 23:33:31 +1100404 blen = uudecode(encoded, blob, sizeof(blob));
Damien Millereba71ba2000-04-29 23:57:08 +1000405 if (blen < 0) {
406 fprintf(stderr, "uudecode failed.\n");
407 exit(1);
408 }
Damien Miller874d77b2000-10-14 16:23:11 +1100409 k = private ?
410 do_convert_private_ssh2_from_blob(blob, blen) :
Damien Miller0bc1bd82000-11-13 22:57:25 +1100411 key_from_blob(blob, blen);
Damien Miller874d77b2000-10-14 16:23:11 +1100412 if (k == NULL) {
413 fprintf(stderr, "decode blob failed.\n");
414 exit(1);
415 }
416 ok = private ?
Ben Lindstromd09fcf52001-03-29 00:29:54 +0000417 (k->type == KEY_DSA ?
418 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
419 PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
Damien Miller874d77b2000-10-14 16:23:11 +1100420 key_write(k, stdout);
421 if (!ok) {
422 fprintf(stderr, "key write failed");
423 exit(1);
424 }
Damien Millereba71ba2000-04-29 23:57:08 +1000425 key_free(k);
Damien Millera1db12b2002-01-22 23:20:15 +1100426 if (!private)
427 fprintf(stdout, "\n");
Damien Millereba71ba2000-04-29 23:57:08 +1000428 fclose(fp);
429 exit(0);
430}
431
Ben Lindstrombba81212001-06-25 05:01:22 +0000432static void
Damien Millereba71ba2000-04-29 23:57:08 +1000433do_print_public(struct passwd *pw)
434{
Ben Lindstromd0fca422001-03-26 13:44:06 +0000435 Key *prv;
Damien Millereba71ba2000-04-29 23:57:08 +1000436 struct stat st;
437
438 if (!have_identity)
439 ask_filename(pw, "Enter file in which the key is");
440 if (stat(identity_file, &st) < 0) {
441 perror(identity_file);
442 exit(1);
443 }
Ben Lindstromd78ae762001-06-05 20:35:09 +0000444 prv = load_identity(identity_file);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000445 if (prv == NULL) {
Damien Millereba71ba2000-04-29 23:57:08 +1000446 fprintf(stderr, "load failed\n");
447 exit(1);
448 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000449 if (!key_write(prv, stdout))
Damien Millereba71ba2000-04-29 23:57:08 +1000450 fprintf(stderr, "key_write failed");
Ben Lindstromd0fca422001-03-26 13:44:06 +0000451 key_free(prv);
Damien Millereba71ba2000-04-29 23:57:08 +1000452 fprintf(stdout, "\n");
453 exit(0);
454}
455
Ben Lindstrom6818bfb2001-08-06 21:40:04 +0000456#ifdef SMARTCARD
Ben Lindstromcd392282001-07-04 03:44:03 +0000457static void
Ben Lindstrom8282d6a2001-08-06 21:44:05 +0000458do_upload(struct passwd *pw, const char *sc_reader_id)
Ben Lindstromcd392282001-07-04 03:44:03 +0000459{
Ben Lindstromcd392282001-07-04 03:44:03 +0000460 Key *prv = NULL;
461 struct stat st;
Ben Lindstrom70e3ad82002-03-22 03:33:43 +0000462 int ret;
Ben Lindstromcd392282001-07-04 03:44:03 +0000463
464 if (!have_identity)
465 ask_filename(pw, "Enter file in which the key is");
466 if (stat(identity_file, &st) < 0) {
467 perror(identity_file);
Ben Lindstrom70e3ad82002-03-22 03:33:43 +0000468 exit(1);
Ben Lindstromcd392282001-07-04 03:44:03 +0000469 }
470 prv = load_identity(identity_file);
471 if (prv == NULL) {
472 error("load failed");
Ben Lindstrom70e3ad82002-03-22 03:33:43 +0000473 exit(1);
Ben Lindstromcd392282001-07-04 03:44:03 +0000474 }
Ben Lindstrom70e3ad82002-03-22 03:33:43 +0000475 ret = sc_put_key(prv, sc_reader_id);
476 key_free(prv);
477 if (ret < 0)
478 exit(1);
Damien Miller996acd22003-04-09 20:59:48 +1000479 logit("loading key done");
Ben Lindstrom70e3ad82002-03-22 03:33:43 +0000480 exit(0);
Ben Lindstromcd392282001-07-04 03:44:03 +0000481}
Ben Lindstrom8282d6a2001-08-06 21:44:05 +0000482
483static void
484do_download(struct passwd *pw, const char *sc_reader_id)
485{
Ben Lindstrom0936a5b2002-03-26 03:17:42 +0000486 Key **keys = NULL;
487 int i;
Ben Lindstrom8282d6a2001-08-06 21:44:05 +0000488
Ben Lindstrom0936a5b2002-03-26 03:17:42 +0000489 keys = sc_get_keys(sc_reader_id, NULL);
490 if (keys == NULL)
Ben Lindstrom8282d6a2001-08-06 21:44:05 +0000491 fatal("cannot read public key from smartcard");
Ben Lindstrom0936a5b2002-03-26 03:17:42 +0000492 for (i = 0; keys[i]; i++) {
493 key_write(keys[i], stdout);
494 key_free(keys[i]);
495 fprintf(stdout, "\n");
496 }
497 xfree(keys);
Ben Lindstrom8282d6a2001-08-06 21:44:05 +0000498 exit(0);
499}
Ben Lindstromffce1472001-08-06 21:57:31 +0000500#endif /* SMARTCARD */
Ben Lindstromcd392282001-07-04 03:44:03 +0000501
Ben Lindstrombba81212001-06-25 05:01:22 +0000502static void
Damien Miller10f6f6b1999-11-17 17:29:08 +1100503do_fingerprint(struct passwd *pw)
504{
Damien Miller98c7ad62000-03-09 21:27:49 +1100505 FILE *f;
Damien Millereba71ba2000-04-29 23:57:08 +1000506 Key *public;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000507 char *comment = NULL, *cp, *ep, line[16*1024], *fp;
Ben Lindstrom65366a82001-12-06 16:32:47 +0000508 int i, skip = 0, num = 1, invalid = 1;
509 enum fp_rep rep;
510 enum fp_type fptype;
Damien Miller95def091999-11-25 00:26:21 +1100511 struct stat st;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100512
Ben Lindstromd0fca422001-03-26 13:44:06 +0000513 fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
514 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000515
Damien Miller95def091999-11-25 00:26:21 +1100516 if (!have_identity)
517 ask_filename(pw, "Enter file in which the key is");
518 if (stat(identity_file, &st) < 0) {
519 perror(identity_file);
520 exit(1);
521 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000522 public = key_load_public(identity_file, &comment);
523 if (public != NULL) {
524 fp = key_fingerprint(public, fptype, rep);
Ben Lindstrom58d3b722002-06-23 21:28:13 +0000525 printf("%u %s %s\n", key_size(public), fp, comment);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100526 key_free(public);
527 xfree(comment);
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000528 xfree(fp);
Damien Miller98c7ad62000-03-09 21:27:49 +1100529 exit(0);
530 }
Damien Miller40b59852006-06-13 13:00:25 +1000531 if (comment) {
Ben Lindstromd0fca422001-03-26 13:44:06 +0000532 xfree(comment);
Damien Miller40b59852006-06-13 13:00:25 +1000533 comment = NULL;
534 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100535
536 f = fopen(identity_file, "r");
537 if (f != NULL) {
Damien Miller98c7ad62000-03-09 21:27:49 +1100538 while (fgets(line, sizeof(line), f)) {
539 i = strlen(line) - 1;
540 if (line[i] != '\n') {
541 error("line %d too long: %.40s...", num, line);
542 skip = 1;
543 continue;
Damien Miller95def091999-11-25 00:26:21 +1100544 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100545 num++;
546 if (skip) {
547 skip = 0;
548 continue;
549 }
550 line[i] = '\0';
551
552 /* Skip leading whitespace, empty and comment lines. */
553 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
554 ;
555 if (!*cp || *cp == '\n' || *cp == '#')
Damien Miller80163902007-01-05 16:30:16 +1100556 continue;
Damien Miller98c7ad62000-03-09 21:27:49 +1100557 i = strtol(cp, &ep, 10);
558 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
559 int quoted = 0;
560 comment = cp;
Ben Lindstrom58d3b722002-06-23 21:28:13 +0000561 for (; *cp && (quoted || (*cp != ' ' &&
562 *cp != '\t')); cp++) {
Damien Miller98c7ad62000-03-09 21:27:49 +1100563 if (*cp == '\\' && cp[1] == '"')
564 cp++; /* Skip both */
565 else if (*cp == '"')
566 quoted = !quoted;
567 }
568 if (!*cp)
569 continue;
570 *cp++ = '\0';
571 }
572 ep = cp;
Ben Lindstrom2941f112000-12-29 16:50:13 +0000573 public = key_new(KEY_RSA1);
574 if (key_read(public, &cp) != 1) {
575 cp = ep;
576 key_free(public);
577 public = key_new(KEY_UNSPEC);
578 if (key_read(public, &cp) != 1) {
579 key_free(public);
580 continue;
581 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100582 }
Ben Lindstrom2941f112000-12-29 16:50:13 +0000583 comment = *cp ? cp : comment;
Ben Lindstromd0fca422001-03-26 13:44:06 +0000584 fp = key_fingerprint(public, fptype, rep);
Ben Lindstrom58d3b722002-06-23 21:28:13 +0000585 printf("%u %s %s\n", key_size(public), fp,
Ben Lindstrom2941f112000-12-29 16:50:13 +0000586 comment ? comment : "no comment");
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000587 xfree(fp);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000588 key_free(public);
Ben Lindstrom2941f112000-12-29 16:50:13 +0000589 invalid = 0;
Damien Miller95def091999-11-25 00:26:21 +1100590 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100591 fclose(f);
Damien Miller95def091999-11-25 00:26:21 +1100592 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100593 if (invalid) {
Damien Millereb5fec62001-11-12 10:52:44 +1100594 printf("%s is not a public key file.\n", identity_file);
Damien Miller98c7ad62000-03-09 21:27:49 +1100595 exit(1);
596 }
Damien Miller95def091999-11-25 00:26:21 +1100597 exit(0);
Damien Miller10f6f6b1999-11-17 17:29:08 +1100598}
599
Damien Miller4b42d7f2005-03-01 21:48:35 +1100600static void
601print_host(FILE *f, char *name, Key *public, int hash)
602{
603 if (hash && (name = host_hash(name, NULL, 0)) == NULL)
604 fatal("hash_host failed");
605 fprintf(f, "%s ", name);
606 if (!key_write(public, f))
607 fatal("key_write failed");
608 fprintf(f, "\n");
609}
610
611static void
612do_known_hosts(struct passwd *pw, const char *name)
613{
614 FILE *in, *out = stdout;
615 Key *public;
616 char *cp, *cp2, *kp, *kp2;
617 char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN];
618 int c, i, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0;
619
620 if (!have_identity) {
621 cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
622 if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
623 sizeof(identity_file))
624 fatal("Specified known hosts path too long");
625 xfree(cp);
626 have_identity = 1;
627 }
628 if ((in = fopen(identity_file, "r")) == NULL)
629 fatal("fopen: %s", strerror(errno));
630
631 /*
632 * Find hosts goes to stdout, hash and deletions happen in-place
633 * A corner case is ssh-keygen -HF foo, which should go to stdout
634 */
635 if (!find_host && (hash_hosts || delete_host)) {
636 if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
637 strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
638 strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
639 strlcat(old, ".old", sizeof(old)) >= sizeof(old))
640 fatal("known_hosts path too long");
641 umask(077);
642 if ((c = mkstemp(tmp)) == -1)
643 fatal("mkstemp: %s", strerror(errno));
644 if ((out = fdopen(c, "w")) == NULL) {
645 c = errno;
646 unlink(tmp);
647 fatal("fdopen: %s", strerror(c));
648 }
649 inplace = 1;
650 }
651
652 while (fgets(line, sizeof(line), in)) {
653 num++;
654 i = strlen(line) - 1;
655 if (line[i] != '\n') {
656 error("line %d too long: %.40s...", num, line);
657 skip = 1;
658 invalid = 1;
659 continue;
660 }
661 if (skip) {
662 skip = 0;
663 continue;
664 }
665 line[i] = '\0';
666
667 /* Skip leading whitespace, empty and comment lines. */
668 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
669 ;
670 if (!*cp || *cp == '\n' || *cp == '#') {
671 if (inplace)
672 fprintf(out, "%s\n", cp);
673 continue;
674 }
675 /* Find the end of the host name portion. */
676 for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++)
677 ;
678 if (*kp == '\0' || *(kp + 1) == '\0') {
679 error("line %d missing key: %.40s...",
680 num, line);
681 invalid = 1;
682 continue;
683 }
684 *kp++ = '\0';
685 kp2 = kp;
686
687 public = key_new(KEY_RSA1);
688 if (key_read(public, &kp) != 1) {
689 kp = kp2;
690 key_free(public);
691 public = key_new(KEY_UNSPEC);
692 if (key_read(public, &kp) != 1) {
693 error("line %d invalid key: %.40s...",
694 num, line);
695 key_free(public);
696 invalid = 1;
697 continue;
698 }
699 }
700
701 if (*cp == HASH_DELIM) {
702 if (find_host || delete_host) {
703 cp2 = host_hash(name, cp, strlen(cp));
704 if (cp2 == NULL) {
705 error("line %d: invalid hashed "
706 "name: %.64s...", num, line);
707 invalid = 1;
708 continue;
709 }
710 c = (strcmp(cp2, cp) == 0);
711 if (find_host && c) {
712 printf("# Host %s found: "
713 "line %d type %s\n", name,
714 num, key_type(public));
715 print_host(out, cp, public, 0);
716 }
717 if (delete_host && !c)
718 print_host(out, cp, public, 0);
719 } else if (hash_hosts)
720 print_host(out, cp, public, 0);
721 } else {
722 if (find_host || delete_host) {
723 c = (match_hostname(name, cp,
724 strlen(cp)) == 1);
725 if (find_host && c) {
726 printf("# Host %s found: "
727 "line %d type %s\n", name,
728 num, key_type(public));
729 print_host(out, cp, public, hash_hosts);
730 }
731 if (delete_host && !c)
732 print_host(out, cp, public, 0);
733 } else if (hash_hosts) {
Darren Tucker47eede72005-03-14 23:08:12 +1100734 for (cp2 = strsep(&cp, ",");
Damien Miller4b42d7f2005-03-01 21:48:35 +1100735 cp2 != NULL && *cp2 != '\0';
Damien Miller89eac802005-03-02 12:33:04 +1100736 cp2 = strsep(&cp, ",")) {
737 if (strcspn(cp2, "*?!") != strlen(cp2))
738 fprintf(stderr, "Warning: "
739 "ignoring host name with "
740 "metacharacters: %.64s\n",
741 cp2);
742 else
743 print_host(out, cp2, public, 1);
744 }
Damien Miller4b42d7f2005-03-01 21:48:35 +1100745 has_unhashed = 1;
746 }
747 }
748 key_free(public);
749 }
750 fclose(in);
751
752 if (invalid) {
753 fprintf(stderr, "%s is not a valid known_host file.\n",
754 identity_file);
755 if (inplace) {
756 fprintf(stderr, "Not replacing existing known_hosts "
Darren Tucker9f438a92005-03-14 23:09:18 +1100757 "file because of errors\n");
Damien Miller4b42d7f2005-03-01 21:48:35 +1100758 fclose(out);
759 unlink(tmp);
760 }
761 exit(1);
762 }
763
764 if (inplace) {
765 fclose(out);
766
767 /* Backup existing file */
768 if (unlink(old) == -1 && errno != ENOENT)
769 fatal("unlink %.100s: %s", old, strerror(errno));
770 if (link(identity_file, old) == -1)
771 fatal("link %.100s to %.100s: %s", identity_file, old,
772 strerror(errno));
773 /* Move new one into place */
774 if (rename(tmp, identity_file) == -1) {
775 error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
776 strerror(errno));
777 unlink(tmp);
778 unlink(old);
779 exit(1);
780 }
781
782 fprintf(stderr, "%s updated.\n", identity_file);
783 fprintf(stderr, "Original contents retained as %s\n", old);
784 if (has_unhashed) {
785 fprintf(stderr, "WARNING: %s contains unhashed "
786 "entries\n", old);
787 fprintf(stderr, "Delete this file to ensure privacy "
Damien Miller0dc1bef2005-07-17 17:22:45 +1000788 "of hostnames\n");
Damien Miller4b42d7f2005-03-01 21:48:35 +1100789 }
790 }
791
792 exit(0);
793}
794
Damien Miller95def091999-11-25 00:26:21 +1100795/*
796 * Perform changing a passphrase. The argument is the passwd structure
797 * for the current user.
798 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000799static void
Damien Miller10f6f6b1999-11-17 17:29:08 +1100800do_change_passphrase(struct passwd *pw)
801{
Damien Miller95def091999-11-25 00:26:21 +1100802 char *comment;
803 char *old_passphrase, *passphrase1, *passphrase2;
804 struct stat st;
Damien Millereba71ba2000-04-29 23:57:08 +1000805 Key *private;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100806
Damien Miller95def091999-11-25 00:26:21 +1100807 if (!have_identity)
808 ask_filename(pw, "Enter file in which the key is");
Damien Miller95def091999-11-25 00:26:21 +1100809 if (stat(identity_file, &st) < 0) {
810 perror(identity_file);
811 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000812 }
Damien Miller95def091999-11-25 00:26:21 +1100813 /* Try to load the file with empty passphrase. */
Ben Lindstromd0fca422001-03-26 13:44:06 +0000814 private = key_load_private(identity_file, "", &comment);
815 if (private == NULL) {
Damien Miller95def091999-11-25 00:26:21 +1100816 if (identity_passphrase)
817 old_passphrase = xstrdup(identity_passphrase);
818 else
Ben Lindstrom949974b2001-06-25 05:20:31 +0000819 old_passphrase =
820 read_passphrase("Enter old passphrase: ",
821 RP_ALLOW_STDIN);
822 private = key_load_private(identity_file, old_passphrase,
823 &comment);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000824 memset(old_passphrase, 0, strlen(old_passphrase));
825 xfree(old_passphrase);
826 if (private == NULL) {
Damien Miller95def091999-11-25 00:26:21 +1100827 printf("Bad passphrase.\n");
828 exit(1);
829 }
Damien Miller95def091999-11-25 00:26:21 +1100830 }
831 printf("Key has comment '%s'\n", comment);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000832
Damien Miller95def091999-11-25 00:26:21 +1100833 /* Ask the new passphrase (twice). */
834 if (identity_new_passphrase) {
835 passphrase1 = xstrdup(identity_new_passphrase);
836 passphrase2 = NULL;
837 } else {
838 passphrase1 =
Ben Lindstrom949974b2001-06-25 05:20:31 +0000839 read_passphrase("Enter new passphrase (empty for no "
840 "passphrase): ", RP_ALLOW_STDIN);
841 passphrase2 = read_passphrase("Enter same passphrase again: ",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100842 RP_ALLOW_STDIN);
Damien Miller95def091999-11-25 00:26:21 +1100843
844 /* Verify that they are the same. */
845 if (strcmp(passphrase1, passphrase2) != 0) {
846 memset(passphrase1, 0, strlen(passphrase1));
847 memset(passphrase2, 0, strlen(passphrase2));
848 xfree(passphrase1);
849 xfree(passphrase2);
850 printf("Pass phrases do not match. Try again.\n");
851 exit(1);
852 }
853 /* Destroy the other copy. */
854 memset(passphrase2, 0, strlen(passphrase2));
855 xfree(passphrase2);
856 }
857
858 /* Save the file using the new passphrase. */
Ben Lindstromd0fca422001-03-26 13:44:06 +0000859 if (!key_save_private(private, identity_file, passphrase1, comment)) {
Ben Lindstrom15f33862001-04-16 02:00:02 +0000860 printf("Saving the key failed: %s.\n", identity_file);
Damien Miller95def091999-11-25 00:26:21 +1100861 memset(passphrase1, 0, strlen(passphrase1));
862 xfree(passphrase1);
Damien Millereba71ba2000-04-29 23:57:08 +1000863 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100864 xfree(comment);
865 exit(1);
866 }
867 /* Destroy the passphrase and the copy of the key in memory. */
868 memset(passphrase1, 0, strlen(passphrase1));
869 xfree(passphrase1);
Damien Millereba71ba2000-04-29 23:57:08 +1000870 key_free(private); /* Destroys contents */
Damien Miller95def091999-11-25 00:26:21 +1100871 xfree(comment);
872
873 printf("Your identification has been saved with the new passphrase.\n");
874 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000875}
876
Damien Miller37876e92003-05-15 10:19:46 +1000877/*
878 * Print the SSHFP RR.
879 */
Damien Millercb314822006-03-26 13:48:01 +1100880static int
881do_print_resource_record(struct passwd *pw, char *fname, char *hname)
Damien Miller37876e92003-05-15 10:19:46 +1000882{
883 Key *public;
884 char *comment = NULL;
885 struct stat st;
886
Damien Millercb314822006-03-26 13:48:01 +1100887 if (fname == NULL)
Damien Miller37876e92003-05-15 10:19:46 +1000888 ask_filename(pw, "Enter file in which the key is");
Damien Millercb314822006-03-26 13:48:01 +1100889 if (stat(fname, &st) < 0) {
890 if (errno == ENOENT)
891 return 0;
892 perror(fname);
Damien Miller37876e92003-05-15 10:19:46 +1000893 exit(1);
894 }
Damien Millercb314822006-03-26 13:48:01 +1100895 public = key_load_public(fname, &comment);
Damien Miller37876e92003-05-15 10:19:46 +1000896 if (public != NULL) {
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000897 export_dns_rr(hname, public, stdout, print_generic);
Damien Miller37876e92003-05-15 10:19:46 +1000898 key_free(public);
899 xfree(comment);
Damien Millercb314822006-03-26 13:48:01 +1100900 return 1;
Damien Miller37876e92003-05-15 10:19:46 +1000901 }
902 if (comment)
903 xfree(comment);
904
Damien Millercb314822006-03-26 13:48:01 +1100905 printf("failed to read v2 public key from %s.\n", fname);
Damien Miller37876e92003-05-15 10:19:46 +1000906 exit(1);
907}
Damien Miller37876e92003-05-15 10:19:46 +1000908
Damien Miller95def091999-11-25 00:26:21 +1100909/*
910 * Change the comment of a private key file.
911 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000912static void
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000913do_change_comment(struct passwd *pw)
914{
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000915 char new_comment[1024], *comment, *passphrase;
Ben Lindstromd0fca422001-03-26 13:44:06 +0000916 Key *private;
917 Key *public;
Damien Miller95def091999-11-25 00:26:21 +1100918 struct stat st;
919 FILE *f;
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000920 int fd;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000921
Damien Miller95def091999-11-25 00:26:21 +1100922 if (!have_identity)
923 ask_filename(pw, "Enter file in which the key is");
Damien Miller95def091999-11-25 00:26:21 +1100924 if (stat(identity_file, &st) < 0) {
925 perror(identity_file);
926 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000927 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000928 private = key_load_private(identity_file, "", &comment);
929 if (private == NULL) {
Damien Miller95def091999-11-25 00:26:21 +1100930 if (identity_passphrase)
931 passphrase = xstrdup(identity_passphrase);
932 else if (identity_new_passphrase)
933 passphrase = xstrdup(identity_new_passphrase);
934 else
Ben Lindstrom949974b2001-06-25 05:20:31 +0000935 passphrase = read_passphrase("Enter passphrase: ",
936 RP_ALLOW_STDIN);
Damien Miller95def091999-11-25 00:26:21 +1100937 /* Try to load using the passphrase. */
Ben Lindstromd0fca422001-03-26 13:44:06 +0000938 private = key_load_private(identity_file, passphrase, &comment);
939 if (private == NULL) {
Damien Miller95def091999-11-25 00:26:21 +1100940 memset(passphrase, 0, strlen(passphrase));
941 xfree(passphrase);
942 printf("Bad passphrase.\n");
943 exit(1);
944 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000945 } else {
946 passphrase = xstrdup("");
Damien Miller95def091999-11-25 00:26:21 +1100947 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000948 if (private->type != KEY_RSA1) {
949 fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
950 key_free(private);
951 exit(1);
Damien Miller9f0f5c62001-12-21 14:45:46 +1100952 }
Damien Miller95def091999-11-25 00:26:21 +1100953 printf("Key now has comment '%s'\n", comment);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000954
Damien Miller95def091999-11-25 00:26:21 +1100955 if (identity_comment) {
956 strlcpy(new_comment, identity_comment, sizeof(new_comment));
957 } else {
958 printf("Enter new comment: ");
959 fflush(stdout);
960 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
961 memset(passphrase, 0, strlen(passphrase));
Damien Millereba71ba2000-04-29 23:57:08 +1000962 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100963 exit(1);
964 }
Damien Miller95def091999-11-25 00:26:21 +1100965 if (strchr(new_comment, '\n'))
966 *strchr(new_comment, '\n') = 0;
967 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000968
Damien Miller95def091999-11-25 00:26:21 +1100969 /* Save the file using the new passphrase. */
Ben Lindstromd0fca422001-03-26 13:44:06 +0000970 if (!key_save_private(private, identity_file, passphrase, new_comment)) {
Ben Lindstrom15f33862001-04-16 02:00:02 +0000971 printf("Saving the key failed: %s.\n", identity_file);
Damien Miller95def091999-11-25 00:26:21 +1100972 memset(passphrase, 0, strlen(passphrase));
973 xfree(passphrase);
Damien Millereba71ba2000-04-29 23:57:08 +1000974 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100975 xfree(comment);
976 exit(1);
977 }
Damien Miller95def091999-11-25 00:26:21 +1100978 memset(passphrase, 0, strlen(passphrase));
979 xfree(passphrase);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000980 public = key_from_private(private);
Damien Millereba71ba2000-04-29 23:57:08 +1000981 key_free(private);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000982
Damien Miller95def091999-11-25 00:26:21 +1100983 strlcat(identity_file, ".pub", sizeof(identity_file));
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000984 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
985 if (fd == -1) {
Damien Miller95def091999-11-25 00:26:21 +1100986 printf("Could not save your public key in %s\n", identity_file);
987 exit(1);
988 }
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000989 f = fdopen(fd, "w");
990 if (f == NULL) {
991 printf("fdopen %s failed", identity_file);
992 exit(1);
993 }
Damien Millereba71ba2000-04-29 23:57:08 +1000994 if (!key_write(public, f))
995 fprintf(stderr, "write key failed");
996 key_free(public);
997 fprintf(f, " %s\n", new_comment);
Damien Miller95def091999-11-25 00:26:21 +1100998 fclose(f);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000999
Damien Miller95def091999-11-25 00:26:21 +11001000 xfree(comment);
1001
1002 printf("The comment in your key file has been changed.\n");
1003 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001004}
1005
Ben Lindstrombba81212001-06-25 05:01:22 +00001006static void
Damien Miller431f66b1999-11-21 18:31:57 +11001007usage(void)
1008{
Ben Lindstrom97be31e2001-08-06 21:49:06 +00001009 fprintf(stderr, "Usage: %s [options]\n", __progname);
1010 fprintf(stderr, "Options:\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001011 fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n");
Ben Lindstrom97be31e2001-08-06 21:49:06 +00001012 fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001013 fprintf(stderr, " -b bits Number of bits in the key to create.\n");
Ben Lindstrom97be31e2001-08-06 21:49:06 +00001014 fprintf(stderr, " -C comment Provide new comment.\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001015 fprintf(stderr, " -c Change comment in private and public key files.\n");
Ben Lindstrom97be31e2001-08-06 21:49:06 +00001016#ifdef SMARTCARD
1017 fprintf(stderr, " -D reader Download public key from smartcard.\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001018#endif /* SMARTCARD */
Darren Tucker26dc3e62007-02-19 22:09:06 +11001019 fprintf(stderr, " -e Convert OpenSSH to RFC 4716 key file.\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001020 fprintf(stderr, " -F hostname Find hostname in known hosts file.\n");
1021 fprintf(stderr, " -f filename Filename of the key file.\n");
1022 fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n");
1023 fprintf(stderr, " -g Use generic DNS resource record format.\n");
1024 fprintf(stderr, " -H Hash names in known_hosts file.\n");
Darren Tucker26dc3e62007-02-19 22:09:06 +11001025 fprintf(stderr, " -i Convert RFC 4716 to OpenSSH key file.\n");
Damien Miller9278ffa2005-05-26 11:59:06 +10001026 fprintf(stderr, " -l Show fingerprint of key file.\n");
1027 fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n");
1028 fprintf(stderr, " -N phrase Provide new passphrase.\n");
1029 fprintf(stderr, " -P phrase Provide old passphrase.\n");
1030 fprintf(stderr, " -p Change passphrase of private key file.\n");
1031 fprintf(stderr, " -q Quiet.\n");
1032 fprintf(stderr, " -R hostname Remove host from known_hosts file.\n");
1033 fprintf(stderr, " -r hostname Print DNS resource record.\n");
1034 fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n");
1035 fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n");
1036 fprintf(stderr, " -t type Specify type of key to create.\n");
1037#ifdef SMARTCARD
Ben Lindstrom97be31e2001-08-06 21:49:06 +00001038 fprintf(stderr, " -U reader Upload private key to smartcard.\n");
1039#endif /* SMARTCARD */
Damien Miller9278ffa2005-05-26 11:59:06 +10001040 fprintf(stderr, " -v Verbose.\n");
1041 fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n");
1042 fprintf(stderr, " -y Read private key file and print public key.\n");
Darren Tucker019cefe2003-08-02 22:40:07 +10001043
Damien Miller95def091999-11-25 00:26:21 +11001044 exit(1);
Damien Miller431f66b1999-11-21 18:31:57 +11001045}
1046
Damien Miller95def091999-11-25 00:26:21 +11001047/*
1048 * Main program for key management.
1049 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001050int
Damien Millerdf8b7db2007-01-05 16:22:57 +11001051main(int argc, char **argv)
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001052{
Damien Millera41c8b12002-01-22 23:05:08 +11001053 char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
Tim Rice2e0e38e2003-09-08 16:11:33 -07001054 char out_file[MAXPATHLEN], *reader_id = NULL;
Damien Miller4b42d7f2005-03-01 21:48:35 +11001055 char *rr_hostname = NULL;
Ben Lindstrom5fc62702001-03-09 18:19:24 +00001056 Key *private, *public;
Damien Miller95def091999-11-25 00:26:21 +11001057 struct passwd *pw;
Damien Miller95def091999-11-25 00:26:21 +11001058 struct stat st;
Damien Millerb089fb52005-05-26 12:16:18 +10001059 int opt, type, fd, download = 0;
Darren Tucker2db8ae62005-06-01 23:02:25 +10001060 u_int32_t memory = 0, generator_wanted = 0, trials = 100;
Darren Tucker019cefe2003-08-02 22:40:07 +10001061 int do_gen_candidates = 0, do_screen_candidates = 0;
Darren Tucker06930c72003-12-31 11:34:51 +11001062 int log_level = SYSLOG_LEVEL_INFO;
Darren Tucker019cefe2003-08-02 22:40:07 +10001063 BIGNUM *start = NULL;
Damien Miller95def091999-11-25 00:26:21 +11001064 FILE *f;
Damien Miller02e754f2005-05-26 12:19:39 +10001065 const char *errstr;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001066
Damien Miller95def091999-11-25 00:26:21 +11001067 extern int optind;
1068 extern char *optarg;
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001069
Darren Tuckerce321d82005-10-03 18:11:24 +10001070 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
1071 sanitise_stdfd();
1072
Darren Tucker9ac56e92007-01-14 10:19:59 +11001073 __progname = ssh_get_progname(argv[0]);
Damien Millerf9b625c2000-07-09 22:42:32 +10001074
Damien Millerd3a18572000-06-07 19:55:44 +10001075 SSLeay_add_all_algorithms();
Damien Millerdf8b7db2007-01-05 16:22:57 +11001076 log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
Darren Tucker019cefe2003-08-02 22:40:07 +10001077
Kevin Steves3a881912002-07-20 19:05:40 +00001078 init_rng();
1079 seed_rng();
Damien Millereba71ba2000-04-29 23:57:08 +10001080
Damien Miller5428f641999-11-25 11:54:57 +11001081 /* we need this for the home * directory. */
Damien Miller95def091999-11-25 00:26:21 +11001082 pw = getpwuid(getuid());
1083 if (!pw) {
1084 printf("You don't exist, go away!\n");
1085 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001086 }
Damien Millereba71ba2000-04-29 23:57:08 +10001087 if (gethostname(hostname, sizeof(hostname)) < 0) {
1088 perror("gethostname");
1089 exit(1);
1090 }
Damien Miller5428f641999-11-25 11:54:57 +11001091
Damien Millerdf8b7db2007-01-05 16:22:57 +11001092 while ((opt = getopt(argc, argv,
Damien Miller4b42d7f2005-03-01 21:48:35 +11001093 "degiqpclBHvxXyF:b:f:t:U:D:P:N:C:r:g:R:T:G:M:S:a:W:")) != -1) {
Damien Miller95def091999-11-25 00:26:21 +11001094 switch (opt) {
1095 case 'b':
Damien Miller5f340062006-03-26 14:27:57 +11001096 bits = (u_int32_t)strtonum(optarg, 768, 32768, &errstr);
Damien Miller02e754f2005-05-26 12:19:39 +10001097 if (errstr)
1098 fatal("Bits has bad value %s (%s)",
1099 optarg, errstr);
Damien Miller95def091999-11-25 00:26:21 +11001100 break;
Damien Miller4b42d7f2005-03-01 21:48:35 +11001101 case 'F':
1102 find_host = 1;
1103 rr_hostname = optarg;
1104 break;
1105 case 'H':
1106 hash_hosts = 1;
1107 break;
1108 case 'R':
1109 delete_host = 1;
1110 rr_hostname = optarg;
1111 break;
Damien Miller95def091999-11-25 00:26:21 +11001112 case 'l':
1113 print_fingerprint = 1;
1114 break;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +00001115 case 'B':
1116 print_bubblebabble = 1;
1117 break;
Damien Miller95def091999-11-25 00:26:21 +11001118 case 'p':
1119 change_passphrase = 1;
1120 break;
Damien Miller95def091999-11-25 00:26:21 +11001121 case 'c':
1122 change_comment = 1;
1123 break;
Damien Miller95def091999-11-25 00:26:21 +11001124 case 'f':
Damien Millerb089fb52005-05-26 12:16:18 +10001125 if (strlcpy(identity_file, optarg, sizeof(identity_file)) >=
1126 sizeof(identity_file))
1127 fatal("Identity filename too long");
Damien Miller95def091999-11-25 00:26:21 +11001128 have_identity = 1;
1129 break;
Damien Miller37876e92003-05-15 10:19:46 +10001130 case 'g':
1131 print_generic = 1;
1132 break;
Damien Miller95def091999-11-25 00:26:21 +11001133 case 'P':
1134 identity_passphrase = optarg;
1135 break;
Damien Miller95def091999-11-25 00:26:21 +11001136 case 'N':
1137 identity_new_passphrase = optarg;
1138 break;
Damien Miller95def091999-11-25 00:26:21 +11001139 case 'C':
1140 identity_comment = optarg;
1141 break;
Damien Miller95def091999-11-25 00:26:21 +11001142 case 'q':
1143 quiet = 1;
1144 break;
Ben Lindstrom5a707822001-04-22 17:15:46 +00001145 case 'e':
Damien Millereba71ba2000-04-29 23:57:08 +10001146 case 'x':
Ben Lindstrom5a707822001-04-22 17:15:46 +00001147 /* export key */
Damien Millereba71ba2000-04-29 23:57:08 +10001148 convert_to_ssh2 = 1;
1149 break;
Ben Lindstrom5a707822001-04-22 17:15:46 +00001150 case 'i':
Damien Millereba71ba2000-04-29 23:57:08 +10001151 case 'X':
Ben Lindstrom5a707822001-04-22 17:15:46 +00001152 /* import key */
Damien Millereba71ba2000-04-29 23:57:08 +10001153 convert_from_ssh2 = 1;
1154 break;
Damien Millereba71ba2000-04-29 23:57:08 +10001155 case 'y':
1156 print_public = 1;
1157 break;
Damien Millereba71ba2000-04-29 23:57:08 +10001158 case 'd':
Damien Miller0bc1bd82000-11-13 22:57:25 +11001159 key_type_name = "dsa";
Damien Millereba71ba2000-04-29 23:57:08 +10001160 break;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001161 case 't':
1162 key_type_name = optarg;
Damien Miller0bc1bd82000-11-13 22:57:25 +11001163 break;
Ben Lindstrom8282d6a2001-08-06 21:44:05 +00001164 case 'D':
1165 download = 1;
Damien Miller90967402006-03-26 14:07:26 +11001166 /*FALLTHROUGH*/
Ben Lindstromf19578c2001-08-06 21:46:54 +00001167 case 'U':
Ben Lindstrom8282d6a2001-08-06 21:44:05 +00001168 reader_id = optarg;
Ben Lindstromcd392282001-07-04 03:44:03 +00001169 break;
Darren Tucker06930c72003-12-31 11:34:51 +11001170 case 'v':
1171 if (log_level == SYSLOG_LEVEL_INFO)
1172 log_level = SYSLOG_LEVEL_DEBUG1;
1173 else {
Darren Tuckerfc959702004-07-17 16:12:08 +10001174 if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
Darren Tucker06930c72003-12-31 11:34:51 +11001175 log_level < SYSLOG_LEVEL_DEBUG3)
1176 log_level++;
1177 }
1178 break;
Damien Miller37876e92003-05-15 10:19:46 +10001179 case 'r':
Damien Miller4b42d7f2005-03-01 21:48:35 +11001180 rr_hostname = optarg;
Damien Miller37876e92003-05-15 10:19:46 +10001181 break;
Darren Tucker019cefe2003-08-02 22:40:07 +10001182 case 'W':
Damien Miller5f340062006-03-26 14:27:57 +11001183 generator_wanted = (u_int32_t)strtonum(optarg, 1,
1184 UINT_MAX, &errstr);
Damien Millerb089fb52005-05-26 12:16:18 +10001185 if (errstr)
1186 fatal("Desired generator has bad value: %s (%s)",
1187 optarg, errstr);
Darren Tucker019cefe2003-08-02 22:40:07 +10001188 break;
1189 case 'a':
Damien Miller5f340062006-03-26 14:27:57 +11001190 trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
Damien Millerb089fb52005-05-26 12:16:18 +10001191 if (errstr)
1192 fatal("Invalid number of trials: %s (%s)",
1193 optarg, errstr);
Darren Tucker019cefe2003-08-02 22:40:07 +10001194 break;
1195 case 'M':
Damien Miller5f340062006-03-26 14:27:57 +11001196 memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr);
Damien Millerb089fb52005-05-26 12:16:18 +10001197 if (errstr) {
1198 fatal("Memory limit is %s: %s", errstr, optarg);
1199 }
Darren Tucker019cefe2003-08-02 22:40:07 +10001200 break;
1201 case 'G':
1202 do_gen_candidates = 1;
Damien Millerb089fb52005-05-26 12:16:18 +10001203 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1204 sizeof(out_file))
1205 fatal("Output filename too long");
Darren Tucker019cefe2003-08-02 22:40:07 +10001206 break;
1207 case 'T':
1208 do_screen_candidates = 1;
Damien Millerb089fb52005-05-26 12:16:18 +10001209 if (strlcpy(out_file, optarg, sizeof(out_file)) >=
1210 sizeof(out_file))
1211 fatal("Output filename too long");
Darren Tucker019cefe2003-08-02 22:40:07 +10001212 break;
1213 case 'S':
1214 /* XXX - also compare length against bits */
1215 if (BN_hex2bn(&start, optarg) == 0)
1216 fatal("Invalid start point.");
1217 break;
Damien Miller95def091999-11-25 00:26:21 +11001218 case '?':
1219 default:
1220 usage();
1221 }
1222 }
Darren Tucker06930c72003-12-31 11:34:51 +11001223
1224 /* reinit */
Damien Millerdf8b7db2007-01-05 16:22:57 +11001225 log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
Darren Tucker06930c72003-12-31 11:34:51 +11001226
Damien Millerdf8b7db2007-01-05 16:22:57 +11001227 if (optind < argc) {
Damien Miller95def091999-11-25 00:26:21 +11001228 printf("Too many arguments.\n");
1229 usage();
1230 }
1231 if (change_passphrase && change_comment) {
1232 printf("Can only have one of -p and -c.\n");
1233 usage();
1234 }
Damien Miller4b42d7f2005-03-01 21:48:35 +11001235 if (delete_host || hash_hosts || find_host)
1236 do_known_hosts(pw, rr_hostname);
Ben Lindstrom8fd372b2001-03-12 03:02:17 +00001237 if (print_fingerprint || print_bubblebabble)
Damien Miller95def091999-11-25 00:26:21 +11001238 do_fingerprint(pw);
Damien Miller95def091999-11-25 00:26:21 +11001239 if (change_passphrase)
1240 do_change_passphrase(pw);
Damien Miller4a10d2e2002-03-11 22:53:29 +11001241 if (change_comment)
1242 do_change_comment(pw);
Kevin Steves3a881912002-07-20 19:05:40 +00001243 if (convert_to_ssh2)
1244 do_convert_to_ssh2(pw);
1245 if (convert_from_ssh2)
1246 do_convert_from_ssh2(pw);
Damien Millereba71ba2000-04-29 23:57:08 +10001247 if (print_public)
1248 do_print_public(pw);
Damien Miller4b42d7f2005-03-01 21:48:35 +11001249 if (rr_hostname != NULL) {
Damien Millercb314822006-03-26 13:48:01 +11001250 unsigned int n = 0;
1251
1252 if (have_identity) {
1253 n = do_print_resource_record(pw,
1254 identity_file, rr_hostname);
1255 if (n == 0) {
1256 perror(identity_file);
1257 exit(1);
1258 }
1259 exit(0);
1260 } else {
1261
1262 n += do_print_resource_record(pw,
1263 _PATH_HOST_RSA_KEY_FILE, rr_hostname);
1264 n += do_print_resource_record(pw,
1265 _PATH_HOST_DSA_KEY_FILE, rr_hostname);
1266
1267 if (n == 0)
1268 fatal("no keys found.");
1269 exit(0);
1270 }
Damien Miller37876e92003-05-15 10:19:46 +10001271 }
Ben Lindstrom8282d6a2001-08-06 21:44:05 +00001272 if (reader_id != NULL) {
Ben Lindstrom6818bfb2001-08-06 21:40:04 +00001273#ifdef SMARTCARD
Ben Lindstrom8282d6a2001-08-06 21:44:05 +00001274 if (download)
1275 do_download(pw, reader_id);
1276 else
1277 do_upload(pw, reader_id);
Ben Lindstromffce1472001-08-06 21:57:31 +00001278#else /* SMARTCARD */
Ben Lindstrom6818bfb2001-08-06 21:40:04 +00001279 fatal("no support for smartcards.");
Ben Lindstromffce1472001-08-06 21:57:31 +00001280#endif /* SMARTCARD */
Ben Lindstrom8282d6a2001-08-06 21:44:05 +00001281 }
Damien Miller95def091999-11-25 00:26:21 +11001282
Darren Tucker019cefe2003-08-02 22:40:07 +10001283 if (do_gen_candidates) {
1284 FILE *out = fopen(out_file, "w");
Damien Miller787b2ec2003-11-21 23:56:47 +11001285
Darren Tucker019cefe2003-08-02 22:40:07 +10001286 if (out == NULL) {
1287 error("Couldn't open modulus candidate file \"%s\": %s",
1288 out_file, strerror(errno));
1289 return (1);
1290 }
Damien Miller3f54a9f2005-11-05 14:52:18 +11001291 if (bits == 0)
1292 bits = DEFAULT_BITS;
Darren Tucker019cefe2003-08-02 22:40:07 +10001293 if (gen_candidates(out, memory, bits, start) != 0)
Damien Miller15d72a02005-11-05 15:07:33 +11001294 fatal("modulus candidate generation failed");
Darren Tucker019cefe2003-08-02 22:40:07 +10001295
1296 return (0);
1297 }
1298
1299 if (do_screen_candidates) {
1300 FILE *in;
1301 FILE *out = fopen(out_file, "w");
1302
1303 if (have_identity && strcmp(identity_file, "-") != 0) {
1304 if ((in = fopen(identity_file, "r")) == NULL) {
1305 fatal("Couldn't open modulus candidate "
Damien Millera8e06ce2003-11-21 23:48:55 +11001306 "file \"%s\": %s", identity_file,
Darren Tucker019cefe2003-08-02 22:40:07 +10001307 strerror(errno));
1308 }
1309 } else
1310 in = stdin;
1311
1312 if (out == NULL) {
1313 fatal("Couldn't open moduli file \"%s\": %s",
1314 out_file, strerror(errno));
1315 }
1316 if (prime_test(in, out, trials, generator_wanted) != 0)
Damien Miller15d72a02005-11-05 15:07:33 +11001317 fatal("modulus screening failed");
Darren Tuckerf4220e62003-08-21 16:44:07 +10001318 return (0);
Darren Tucker019cefe2003-08-02 22:40:07 +10001319 }
1320
Damien Miller95def091999-11-25 00:26:21 +11001321 arc4random_stir();
1322
Damien Millerf14be5c2005-11-05 15:15:49 +11001323 if (key_type_name == NULL)
1324 key_type_name = "rsa";
1325
Damien Millere39cacc2000-11-29 12:18:44 +11001326 type = key_type_from_name(key_type_name);
1327 if (type == KEY_UNSPEC) {
1328 fprintf(stderr, "unknown key type %s\n", key_type_name);
1329 exit(1);
Damien Millereba71ba2000-04-29 23:57:08 +10001330 }
Damien Miller3f54a9f2005-11-05 14:52:18 +11001331 if (bits == 0)
1332 bits = (type == KEY_DSA) ? DEFAULT_BITS_DSA : DEFAULT_BITS;
Tim Rice660c3402005-11-28 17:45:32 -08001333 if (type == KEY_DSA && bits != 1024)
1334 fatal("DSA keys must be 1024 bits");
Darren Tucker3af2ac52005-11-29 13:10:24 +11001335 if (!quiet)
1336 printf("Generating public/private %s key pair.\n", key_type_name);
Damien Miller0bc1bd82000-11-13 22:57:25 +11001337 private = key_generate(type, bits);
1338 if (private == NULL) {
1339 fprintf(stderr, "key_generate failed");
1340 exit(1);
1341 }
1342 public = key_from_private(private);
Damien Miller95def091999-11-25 00:26:21 +11001343
1344 if (!have_identity)
1345 ask_filename(pw, "Enter file in which to save the key");
1346
Damien Miller788f2122005-11-05 15:14:59 +11001347 /* Create ~/.ssh directory if it doesn't already exist. */
Ben Lindstrom226cfa02001-01-22 05:34:40 +00001348 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
Damien Miller95def091999-11-25 00:26:21 +11001349 if (strstr(identity_file, dotsshdir) != NULL &&
1350 stat(dotsshdir, &st) < 0) {
Damien Millerbe484b52000-07-15 14:14:16 +10001351 if (mkdir(dotsshdir, 0700) < 0)
Damien Miller95def091999-11-25 00:26:21 +11001352 error("Could not create directory '%s'.", dotsshdir);
1353 else if (!quiet)
1354 printf("Created directory '%s'.\n", dotsshdir);
1355 }
1356 /* If the file already exists, ask the user to confirm. */
1357 if (stat(identity_file, &st) >= 0) {
1358 char yesno[3];
1359 printf("%s already exists.\n", identity_file);
1360 printf("Overwrite (y/n)? ");
1361 fflush(stdout);
1362 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
1363 exit(1);
1364 if (yesno[0] != 'y' && yesno[0] != 'Y')
1365 exit(1);
1366 }
1367 /* Ask for a passphrase (twice). */
1368 if (identity_passphrase)
1369 passphrase1 = xstrdup(identity_passphrase);
1370 else if (identity_new_passphrase)
1371 passphrase1 = xstrdup(identity_new_passphrase);
1372 else {
1373passphrase_again:
1374 passphrase1 =
Ben Lindstrom949974b2001-06-25 05:20:31 +00001375 read_passphrase("Enter passphrase (empty for no "
1376 "passphrase): ", RP_ALLOW_STDIN);
1377 passphrase2 = read_passphrase("Enter same passphrase again: ",
1378 RP_ALLOW_STDIN);
Damien Miller95def091999-11-25 00:26:21 +11001379 if (strcmp(passphrase1, passphrase2) != 0) {
Ben Lindstrom949974b2001-06-25 05:20:31 +00001380 /*
1381 * The passphrases do not match. Clear them and
1382 * retry.
1383 */
Damien Miller95def091999-11-25 00:26:21 +11001384 memset(passphrase1, 0, strlen(passphrase1));
1385 memset(passphrase2, 0, strlen(passphrase2));
1386 xfree(passphrase1);
1387 xfree(passphrase2);
1388 printf("Passphrases do not match. Try again.\n");
1389 goto passphrase_again;
1390 }
1391 /* Clear the other copy of the passphrase. */
1392 memset(passphrase2, 0, strlen(passphrase2));
1393 xfree(passphrase2);
1394 }
1395
Damien Miller95def091999-11-25 00:26:21 +11001396 if (identity_comment) {
1397 strlcpy(comment, identity_comment, sizeof(comment));
1398 } else {
Damien Miller4af51302000-04-16 11:18:38 +10001399 /* Create default commend field for the passphrase. */
Damien Miller95def091999-11-25 00:26:21 +11001400 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1401 }
1402
1403 /* Save the key with the given passphrase and comment. */
Ben Lindstromd0fca422001-03-26 13:44:06 +00001404 if (!key_save_private(private, identity_file, passphrase1, comment)) {
Ben Lindstrom15f33862001-04-16 02:00:02 +00001405 printf("Saving the key failed: %s.\n", identity_file);
Damien Miller95def091999-11-25 00:26:21 +11001406 memset(passphrase1, 0, strlen(passphrase1));
1407 xfree(passphrase1);
1408 exit(1);
1409 }
1410 /* Clear the passphrase. */
1411 memset(passphrase1, 0, strlen(passphrase1));
1412 xfree(passphrase1);
1413
1414 /* Clear the private key and the random number generator. */
Damien Miller0bc1bd82000-11-13 22:57:25 +11001415 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +11001416 arc4random_stir();
1417
1418 if (!quiet)
1419 printf("Your identification has been saved in %s.\n", identity_file);
1420
Damien Miller95def091999-11-25 00:26:21 +11001421 strlcat(identity_file, ".pub", sizeof(identity_file));
Ben Lindstrom5fc62702001-03-09 18:19:24 +00001422 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1423 if (fd == -1) {
Damien Miller95def091999-11-25 00:26:21 +11001424 printf("Could not save your public key in %s\n", identity_file);
1425 exit(1);
1426 }
Ben Lindstrom5fc62702001-03-09 18:19:24 +00001427 f = fdopen(fd, "w");
1428 if (f == NULL) {
1429 printf("fdopen %s failed", identity_file);
1430 exit(1);
1431 }
Damien Millereba71ba2000-04-29 23:57:08 +10001432 if (!key_write(public, f))
1433 fprintf(stderr, "write key failed");
1434 fprintf(f, " %s\n", comment);
Damien Miller95def091999-11-25 00:26:21 +11001435 fclose(f);
1436
1437 if (!quiet) {
Ben Lindstromcfccef92001-03-13 04:57:58 +00001438 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
Damien Millereba71ba2000-04-29 23:57:08 +10001439 printf("Your public key has been saved in %s.\n",
1440 identity_file);
Damien Miller95def091999-11-25 00:26:21 +11001441 printf("The key fingerprint is:\n");
Ben Lindstromcfccef92001-03-13 04:57:58 +00001442 printf("%s %s\n", fp, comment);
1443 xfree(fp);
Damien Miller95def091999-11-25 00:26:21 +11001444 }
Damien Millereba71ba2000-04-29 23:57:08 +10001445
1446 key_free(public);
Damien Miller95def091999-11-25 00:26:21 +11001447 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001448}