blob: 7d04dd6c1a1e37c630edb9416d50a0903ca94ddd [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Identity and host key generation and maintenance.
Damien Millere4340be2000-09-16 13:29:08 +11006 *
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
Damien Miller95def091999-11-25 00:26:21 +110012 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100013
14#include "includes.h"
Ben Lindstromf1107f52001-03-22 02:05:32 +000015RCSID("$OpenBSD: ssh-keygen.c,v 1.51 2001/03/21 14:20:45 jakob Exp $");
Damien Millerd4a8b7e1999-10-27 13:42:43 +100016
Damien Millereba71ba2000-04-29 23:57:08 +100017#include <openssl/evp.h>
18#include <openssl/pem.h>
Damien Millereba71ba2000-04-29 23:57:08 +100019
Damien Millerd4a8b7e1999-10-27 13:42:43 +100020#include "xmalloc.h"
Damien Millereba71ba2000-04-29 23:57:08 +100021#include "key.h"
Damien Millereba71ba2000-04-29 23:57:08 +100022#include "authfile.h"
23#include "uuencode.h"
Damien Miller874d77b2000-10-14 16:23:11 +110024#include "buffer.h"
25#include "bufaux.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000026#include "pathnames.h"
27#include "log.h"
28#include "readpass.h"
Damien Miller874d77b2000-10-14 16:23:11 +110029
Damien Millereba71ba2000-04-29 23:57:08 +100030/* Number of bits in the RSA/DSA key. This value can be changed on the command line. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100031int bits = 1024;
32
Damien Miller5428f641999-11-25 11:54:57 +110033/*
34 * Flag indicating that we just want to change the passphrase. This can be
35 * set on the command line.
36 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100037int change_passphrase = 0;
38
Damien Miller5428f641999-11-25 11:54:57 +110039/*
40 * Flag indicating that we just want to change the comment. This can be set
41 * on the command line.
42 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100043int change_comment = 0;
44
45int quiet = 0;
46
Damien Miller10f6f6b1999-11-17 17:29:08 +110047/* Flag indicating that we just want to see the key fingerprint */
48int print_fingerprint = 0;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +000049int print_bubblebabble = 0;
Damien Miller10f6f6b1999-11-17 17:29:08 +110050
Damien Miller431f66b1999-11-21 18:31:57 +110051/* The identity file name, given on the command line or entered by the user. */
52char identity_file[1024];
53int have_identity = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100054
55/* This is set to the passphrase if given on the command line. */
56char *identity_passphrase = NULL;
57
58/* This is set to the new passphrase if given on the command line. */
59char *identity_new_passphrase = NULL;
60
61/* This is set to the new comment if given on the command line. */
62char *identity_comment = NULL;
63
Damien Millereba71ba2000-04-29 23:57:08 +100064/* Dump public key file in format used by real and the original SSH 2 */
65int convert_to_ssh2 = 0;
66int convert_from_ssh2 = 0;
67int print_public = 0;
Damien Miller0bc1bd82000-11-13 22:57:25 +110068
Damien Millere39cacc2000-11-29 12:18:44 +110069/* default to RSA for SSH-1 */
70char *key_type_name = "rsa1";
Damien Millereba71ba2000-04-29 23:57:08 +100071
Damien Miller431f66b1999-11-21 18:31:57 +110072/* argv0 */
Damien Miller95def091999-11-25 00:26:21 +110073#ifdef HAVE___PROGNAME
Damien Miller431f66b1999-11-21 18:31:57 +110074extern char *__progname;
Ben Lindstrom49a79c02000-11-17 03:47:20 +000075#else
76char *__progname;
77#endif
Damien Millerd4a8b7e1999-10-27 13:42:43 +100078
Damien Millereba71ba2000-04-29 23:57:08 +100079char hostname[MAXHOSTNAMELEN];
80
Damien Miller431f66b1999-11-21 18:31:57 +110081void
82ask_filename(struct passwd *pw, const char *prompt)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100083{
Damien Miller95def091999-11-25 00:26:21 +110084 char buf[1024];
Damien Millere39cacc2000-11-29 12:18:44 +110085 char *name = NULL;
86
87 switch (key_type_from_name(key_type_name)) {
88 case KEY_RSA1:
Ben Lindstrom226cfa02001-01-22 05:34:40 +000089 name = _PATH_SSH_CLIENT_IDENTITY;
Damien Millere39cacc2000-11-29 12:18:44 +110090 break;
91 case KEY_DSA:
Ben Lindstrom226cfa02001-01-22 05:34:40 +000092 name = _PATH_SSH_CLIENT_ID_DSA;
Damien Millere39cacc2000-11-29 12:18:44 +110093 break;
94 case KEY_RSA:
Ben Lindstrom226cfa02001-01-22 05:34:40 +000095 name = _PATH_SSH_CLIENT_ID_RSA;
Damien Millere39cacc2000-11-29 12:18:44 +110096 break;
97 default:
98 fprintf(stderr, "bad key type");
99 exit(1);
100 break;
101 }
102 snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
Ben Lindstrom3deda8b2000-12-22 20:27:43 +0000103 fprintf(stderr, "%s (%s): ", prompt, identity_file);
104 fflush(stderr);
Damien Miller95def091999-11-25 00:26:21 +1100105 if (fgets(buf, sizeof(buf), stdin) == NULL)
106 exit(1);
107 if (strchr(buf, '\n'))
108 *strchr(buf, '\n') = 0;
109 if (strcmp(buf, "") != 0)
110 strlcpy(identity_file, buf, sizeof(identity_file));
111 have_identity = 1;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100112}
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000113
Damien Millereba71ba2000-04-29 23:57:08 +1000114int
115try_load_key(char *filename, Key *k)
116{
117 int success = 1;
118 if (!load_private_key(filename, "", k, NULL)) {
119 char *pass = read_passphrase("Enter passphrase: ", 1);
120 if (!load_private_key(filename, pass, k, NULL)) {
121 success = 0;
122 }
123 memset(pass, 0, strlen(pass));
124 xfree(pass);
125 }
126 return success;
127}
128
Damien Miller874d77b2000-10-14 16:23:11 +1100129#define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
130#define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
131#define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
Kevin Stevesef4eea92001-02-05 12:42:17 +0000132#define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
Damien Millereba71ba2000-04-29 23:57:08 +1000133
134void
135do_convert_to_ssh2(struct passwd *pw)
136{
137 Key *k;
138 int len;
Ben Lindstrom46c16222000-12-22 01:43:59 +0000139 u_char *blob;
Damien Millereba71ba2000-04-29 23:57:08 +1000140 struct stat st;
141
142 if (!have_identity)
143 ask_filename(pw, "Enter file in which the key is");
144 if (stat(identity_file, &st) < 0) {
145 perror(identity_file);
146 exit(1);
147 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100148 k = key_new(KEY_UNSPEC);
Damien Millereba71ba2000-04-29 23:57:08 +1000149 if (!try_load_key(identity_file, k)) {
150 fprintf(stderr, "load failed\n");
151 exit(1);
152 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100153 key_to_blob(k, &blob, &len);
Damien Miller874d77b2000-10-14 16:23:11 +1100154 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
Damien Millereba71ba2000-04-29 23:57:08 +1000155 fprintf(stdout,
Damien Miller874d77b2000-10-14 16:23:11 +1100156 "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n",
157 key_size(k), key_type(k),
Damien Millereba71ba2000-04-29 23:57:08 +1000158 pw->pw_name, hostname);
159 dump_base64(stdout, blob, len);
Damien Miller874d77b2000-10-14 16:23:11 +1100160 fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
Damien Millereba71ba2000-04-29 23:57:08 +1000161 key_free(k);
162 xfree(blob);
163 exit(0);
164}
165
166void
Damien Miller874d77b2000-10-14 16:23:11 +1100167buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
168{
169 int bits = buffer_get_int(b);
170 int bytes = (bits + 7) / 8;
171 if (buffer_len(b) < bytes)
172 fatal("buffer_get_bignum_bits: input buffer too small");
Ben Lindstrom46c16222000-12-22 01:43:59 +0000173 BN_bin2bn((u_char *)buffer_ptr(b), bytes, value);
Damien Miller874d77b2000-10-14 16:23:11 +1100174 buffer_consume(b, bytes);
175}
176
177Key *
178do_convert_private_ssh2_from_blob(char *blob, int blen)
179{
180 Buffer b;
181 DSA *dsa;
182 Key *key = NULL;
183 int ignore, magic, rlen;
184 char *type, *cipher;
185
186 buffer_init(&b);
187 buffer_append(&b, blob, blen);
188
189 magic = buffer_get_int(&b);
190 if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
191 error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
192 buffer_free(&b);
193 return NULL;
194 }
195 ignore = buffer_get_int(&b);
196 type = buffer_get_string(&b, NULL);
197 cipher = buffer_get_string(&b, NULL);
198 ignore = buffer_get_int(&b);
199 ignore = buffer_get_int(&b);
200 ignore = buffer_get_int(&b);
201 xfree(type);
202
203 if (strcmp(cipher, "none") != 0) {
204 error("unsupported cipher %s", cipher);
205 xfree(cipher);
206 buffer_free(&b);
207 return NULL;
208 }
209 xfree(cipher);
210
211 key = key_new(KEY_DSA);
212 dsa = key->dsa;
213 dsa->priv_key = BN_new();
214 if (dsa->priv_key == NULL) {
215 error("alloc priv_key failed");
216 key_free(key);
217 return NULL;
218 }
219 buffer_get_bignum_bits(&b, dsa->p);
220 buffer_get_bignum_bits(&b, dsa->g);
221 buffer_get_bignum_bits(&b, dsa->q);
222 buffer_get_bignum_bits(&b, dsa->pub_key);
223 buffer_get_bignum_bits(&b, dsa->priv_key);
224 rlen = buffer_len(&b);
225 if(rlen != 0)
226 error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen);
227 buffer_free(&b);
228 return key;
229}
230
231void
Damien Millereba71ba2000-04-29 23:57:08 +1000232do_convert_from_ssh2(struct passwd *pw)
233{
234 Key *k;
235 int blen;
236 char line[1024], *p;
237 char blob[8096];
238 char encoded[8096];
239 struct stat st;
Damien Miller874d77b2000-10-14 16:23:11 +1100240 int escaped = 0, private = 0, ok;
Damien Millereba71ba2000-04-29 23:57:08 +1000241 FILE *fp;
242
243 if (!have_identity)
244 ask_filename(pw, "Enter file in which the key is");
245 if (stat(identity_file, &st) < 0) {
246 perror(identity_file);
247 exit(1);
248 }
249 fp = fopen(identity_file, "r");
250 if (fp == NULL) {
251 perror(identity_file);
252 exit(1);
253 }
254 encoded[0] = '\0';
255 while (fgets(line, sizeof(line), fp)) {
Damien Miller30c3d422000-05-09 11:02:59 +1000256 if (!(p = strchr(line, '\n'))) {
257 fprintf(stderr, "input line too long.\n");
258 exit(1);
259 }
260 if (p > line && p[-1] == '\\')
261 escaped++;
Damien Millereba71ba2000-04-29 23:57:08 +1000262 if (strncmp(line, "----", 4) == 0 ||
263 strstr(line, ": ") != NULL) {
Damien Miller874d77b2000-10-14 16:23:11 +1100264 if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
265 private = 1;
Damien Millereba71ba2000-04-29 23:57:08 +1000266 fprintf(stderr, "ignore: %s", line);
267 continue;
268 }
Damien Miller30c3d422000-05-09 11:02:59 +1000269 if (escaped) {
270 escaped--;
271 fprintf(stderr, "escaped: %s", line);
272 continue;
Damien Millereba71ba2000-04-29 23:57:08 +1000273 }
274 *p = '\0';
275 strlcat(encoded, line, sizeof(encoded));
276 }
Ben Lindstrom46c16222000-12-22 01:43:59 +0000277 blen = uudecode(encoded, (u_char *)blob, sizeof(blob));
Damien Millereba71ba2000-04-29 23:57:08 +1000278 if (blen < 0) {
279 fprintf(stderr, "uudecode failed.\n");
280 exit(1);
281 }
Damien Miller874d77b2000-10-14 16:23:11 +1100282 k = private ?
283 do_convert_private_ssh2_from_blob(blob, blen) :
Damien Miller0bc1bd82000-11-13 22:57:25 +1100284 key_from_blob(blob, blen);
Damien Miller874d77b2000-10-14 16:23:11 +1100285 if (k == NULL) {
286 fprintf(stderr, "decode blob failed.\n");
287 exit(1);
288 }
289 ok = private ?
290 PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
291 key_write(k, stdout);
292 if (!ok) {
293 fprintf(stderr, "key write failed");
294 exit(1);
295 }
Damien Millereba71ba2000-04-29 23:57:08 +1000296 key_free(k);
297 fprintf(stdout, "\n");
298 fclose(fp);
299 exit(0);
300}
301
302void
303do_print_public(struct passwd *pw)
304{
305 Key *k;
Damien Millereba71ba2000-04-29 23:57:08 +1000306 struct stat st;
307
308 if (!have_identity)
309 ask_filename(pw, "Enter file in which the key is");
310 if (stat(identity_file, &st) < 0) {
311 perror(identity_file);
312 exit(1);
313 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100314 k = key_new(KEY_UNSPEC);
Damien Millereba71ba2000-04-29 23:57:08 +1000315 if (!try_load_key(identity_file, k)) {
316 fprintf(stderr, "load failed\n");
317 exit(1);
318 }
Damien Millereba71ba2000-04-29 23:57:08 +1000319 if (!key_write(k, stdout))
320 fprintf(stderr, "key_write failed");
321 key_free(k);
Damien Millereba71ba2000-04-29 23:57:08 +1000322 fprintf(stdout, "\n");
323 exit(0);
324}
325
Damien Miller10f6f6b1999-11-17 17:29:08 +1100326void
327do_fingerprint(struct passwd *pw)
328{
Damien Miller98c7ad62000-03-09 21:27:49 +1100329 FILE *f;
Damien Millereba71ba2000-04-29 23:57:08 +1000330 Key *public;
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000331 char *comment = NULL, *cp, *ep, line[16*1024], *fp;
332 int i, skip = 0, num = 1, invalid = 1, success = 0, rep, type;
Damien Miller95def091999-11-25 00:26:21 +1100333 struct stat st;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100334
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000335 type = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
336 rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
337
Damien Miller95def091999-11-25 00:26:21 +1100338 if (!have_identity)
339 ask_filename(pw, "Enter file in which the key is");
340 if (stat(identity_file, &st) < 0) {
341 perror(identity_file);
342 exit(1);
343 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100344 public = key_new(KEY_RSA1);
Damien Millereba71ba2000-04-29 23:57:08 +1000345 if (load_public_key(identity_file, public, &comment)) {
Damien Miller0bc1bd82000-11-13 22:57:25 +1100346 success = 1;
347 } else {
Damien Millereba71ba2000-04-29 23:57:08 +1000348 key_free(public);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100349 public = key_new(KEY_UNSPEC);
350 if (try_load_public_key(identity_file, public, &comment))
351 success = 1;
352 else
Ben Lindstrom2941f112000-12-29 16:50:13 +0000353 debug("try_load_public_key KEY_UNSPEC failed");
Damien Miller0bc1bd82000-11-13 22:57:25 +1100354 }
355 if (success) {
Ben Lindstromcfccef92001-03-13 04:57:58 +0000356 fp = key_fingerprint(public, type, rep);
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000357 printf("%d %s %s\n", key_size(public),
358 fp, comment);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100359 key_free(public);
360 xfree(comment);
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000361 xfree(fp);
Damien Miller98c7ad62000-03-09 21:27:49 +1100362 exit(0);
363 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100364
365 f = fopen(identity_file, "r");
366 if (f != NULL) {
Damien Miller98c7ad62000-03-09 21:27:49 +1100367 while (fgets(line, sizeof(line), f)) {
368 i = strlen(line) - 1;
369 if (line[i] != '\n') {
370 error("line %d too long: %.40s...", num, line);
371 skip = 1;
372 continue;
Damien Miller95def091999-11-25 00:26:21 +1100373 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100374 num++;
375 if (skip) {
376 skip = 0;
377 continue;
378 }
379 line[i] = '\0';
380
381 /* Skip leading whitespace, empty and comment lines. */
382 for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
383 ;
384 if (!*cp || *cp == '\n' || *cp == '#')
385 continue ;
386 i = strtol(cp, &ep, 10);
387 if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
388 int quoted = 0;
389 comment = cp;
390 for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
391 if (*cp == '\\' && cp[1] == '"')
392 cp++; /* Skip both */
393 else if (*cp == '"')
394 quoted = !quoted;
395 }
396 if (!*cp)
397 continue;
398 *cp++ = '\0';
399 }
400 ep = cp;
Ben Lindstrom2941f112000-12-29 16:50:13 +0000401 public = key_new(KEY_RSA1);
402 if (key_read(public, &cp) != 1) {
403 cp = ep;
404 key_free(public);
405 public = key_new(KEY_UNSPEC);
406 if (key_read(public, &cp) != 1) {
407 key_free(public);
408 continue;
409 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100410 }
Ben Lindstrom2941f112000-12-29 16:50:13 +0000411 comment = *cp ? cp : comment;
Ben Lindstromcfccef92001-03-13 04:57:58 +0000412 fp = key_fingerprint(public, type, rep);
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000413 printf("%d %s %s\n", key_size(public), fp,
Ben Lindstrom2941f112000-12-29 16:50:13 +0000414 comment ? comment : "no comment");
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000415 xfree(fp);
Ben Lindstrom2941f112000-12-29 16:50:13 +0000416 invalid = 0;
Damien Miller95def091999-11-25 00:26:21 +1100417 }
Damien Miller98c7ad62000-03-09 21:27:49 +1100418 fclose(f);
Damien Miller95def091999-11-25 00:26:21 +1100419 }
Damien Millerad833b32000-08-23 10:46:23 +1000420 key_free(public);
Damien Miller98c7ad62000-03-09 21:27:49 +1100421 if (invalid) {
422 printf("%s is not a valid key file.\n", identity_file);
423 exit(1);
424 }
Damien Miller95def091999-11-25 00:26:21 +1100425 exit(0);
Damien Miller10f6f6b1999-11-17 17:29:08 +1100426}
427
Damien Miller95def091999-11-25 00:26:21 +1100428/*
429 * Perform changing a passphrase. The argument is the passwd structure
430 * for the current user.
431 */
Damien Miller10f6f6b1999-11-17 17:29:08 +1100432void
433do_change_passphrase(struct passwd *pw)
434{
Damien Miller95def091999-11-25 00:26:21 +1100435 char *comment;
436 char *old_passphrase, *passphrase1, *passphrase2;
437 struct stat st;
Damien Millereba71ba2000-04-29 23:57:08 +1000438 Key *private;
439 Key *public;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100440 int type = KEY_RSA1;
Damien Miller10f6f6b1999-11-17 17:29:08 +1100441
Damien Miller95def091999-11-25 00:26:21 +1100442 if (!have_identity)
443 ask_filename(pw, "Enter file in which the key is");
Damien Miller95def091999-11-25 00:26:21 +1100444 if (stat(identity_file, &st) < 0) {
445 perror(identity_file);
446 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000447 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100448 public = key_new(type);
449 if (!load_public_key(identity_file, public, NULL)) {
450 type = KEY_UNSPEC;
451 } else {
Damien Millereba71ba2000-04-29 23:57:08 +1000452 /* Clear the public key since we are just about to load the whole file. */
453 key_free(public);
Damien Miller95def091999-11-25 00:26:21 +1100454 }
Damien Miller95def091999-11-25 00:26:21 +1100455 /* Try to load the file with empty passphrase. */
Damien Millereba71ba2000-04-29 23:57:08 +1000456 private = key_new(type);
457 if (!load_private_key(identity_file, "", private, &comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100458 if (identity_passphrase)
459 old_passphrase = xstrdup(identity_passphrase);
460 else
461 old_passphrase = read_passphrase("Enter old passphrase: ", 1);
Damien Millereba71ba2000-04-29 23:57:08 +1000462 if (!load_private_key(identity_file, old_passphrase, private, &comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100463 memset(old_passphrase, 0, strlen(old_passphrase));
464 xfree(old_passphrase);
465 printf("Bad passphrase.\n");
466 exit(1);
467 }
Damien Miller95def091999-11-25 00:26:21 +1100468 memset(old_passphrase, 0, strlen(old_passphrase));
469 xfree(old_passphrase);
470 }
471 printf("Key has comment '%s'\n", comment);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000472
Damien Miller95def091999-11-25 00:26:21 +1100473 /* Ask the new passphrase (twice). */
474 if (identity_new_passphrase) {
475 passphrase1 = xstrdup(identity_new_passphrase);
476 passphrase2 = NULL;
477 } else {
478 passphrase1 =
479 read_passphrase("Enter new passphrase (empty for no passphrase): ", 1);
480 passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
481
482 /* Verify that they are the same. */
483 if (strcmp(passphrase1, passphrase2) != 0) {
484 memset(passphrase1, 0, strlen(passphrase1));
485 memset(passphrase2, 0, strlen(passphrase2));
486 xfree(passphrase1);
487 xfree(passphrase2);
488 printf("Pass phrases do not match. Try again.\n");
489 exit(1);
490 }
491 /* Destroy the other copy. */
492 memset(passphrase2, 0, strlen(passphrase2));
493 xfree(passphrase2);
494 }
495
496 /* Save the file using the new passphrase. */
Damien Millereba71ba2000-04-29 23:57:08 +1000497 if (!save_private_key(identity_file, passphrase1, private, comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100498 printf("Saving the key failed: %s: %s.\n",
499 identity_file, strerror(errno));
500 memset(passphrase1, 0, strlen(passphrase1));
501 xfree(passphrase1);
Damien Millereba71ba2000-04-29 23:57:08 +1000502 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100503 xfree(comment);
504 exit(1);
505 }
506 /* Destroy the passphrase and the copy of the key in memory. */
507 memset(passphrase1, 0, strlen(passphrase1));
508 xfree(passphrase1);
Damien Millereba71ba2000-04-29 23:57:08 +1000509 key_free(private); /* Destroys contents */
Damien Miller95def091999-11-25 00:26:21 +1100510 xfree(comment);
511
512 printf("Your identification has been saved with the new passphrase.\n");
513 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000514}
515
Damien Miller95def091999-11-25 00:26:21 +1100516/*
517 * Change the comment of a private key file.
518 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000519void
520do_change_comment(struct passwd *pw)
521{
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000522 char new_comment[1024], *comment, *passphrase;
523 Key *private, *public;
Damien Miller95def091999-11-25 00:26:21 +1100524 struct stat st;
525 FILE *f;
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000526 int fd;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000527
Damien Miller95def091999-11-25 00:26:21 +1100528 if (!have_identity)
529 ask_filename(pw, "Enter file in which the key is");
Damien Miller95def091999-11-25 00:26:21 +1100530 if (stat(identity_file, &st) < 0) {
531 perror(identity_file);
532 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000533 }
Damien Miller5428f641999-11-25 11:54:57 +1100534 /*
535 * Try to load the public key from the file the verify that it is
536 * readable and of the proper format.
537 */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100538 public = key_new(KEY_RSA1);
Damien Millereba71ba2000-04-29 23:57:08 +1000539 if (!load_public_key(identity_file, public, NULL)) {
Damien Miller95def091999-11-25 00:26:21 +1100540 printf("%s is not a valid key file.\n", identity_file);
Ben Lindstromd8a90212001-02-15 03:08:27 +0000541 printf("Comments are only supported in RSA1 keys\n");
Damien Miller95def091999-11-25 00:26:21 +1100542 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000543 }
Damien Miller5428f641999-11-25 11:54:57 +1100544
Damien Miller0bc1bd82000-11-13 22:57:25 +1100545 private = key_new(KEY_RSA1);
Damien Millereba71ba2000-04-29 23:57:08 +1000546 if (load_private_key(identity_file, "", private, &comment))
Damien Miller95def091999-11-25 00:26:21 +1100547 passphrase = xstrdup("");
548 else {
Damien Miller95def091999-11-25 00:26:21 +1100549 if (identity_passphrase)
550 passphrase = xstrdup(identity_passphrase);
551 else if (identity_new_passphrase)
552 passphrase = xstrdup(identity_new_passphrase);
553 else
554 passphrase = read_passphrase("Enter passphrase: ", 1);
555 /* Try to load using the passphrase. */
Damien Millereba71ba2000-04-29 23:57:08 +1000556 if (!load_private_key(identity_file, passphrase, private, &comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100557 memset(passphrase, 0, strlen(passphrase));
558 xfree(passphrase);
559 printf("Bad passphrase.\n");
560 exit(1);
561 }
562 }
563 printf("Key now has comment '%s'\n", comment);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000564
Damien Miller95def091999-11-25 00:26:21 +1100565 if (identity_comment) {
566 strlcpy(new_comment, identity_comment, sizeof(new_comment));
567 } else {
568 printf("Enter new comment: ");
569 fflush(stdout);
570 if (!fgets(new_comment, sizeof(new_comment), stdin)) {
571 memset(passphrase, 0, strlen(passphrase));
Damien Millereba71ba2000-04-29 23:57:08 +1000572 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100573 exit(1);
574 }
Damien Miller95def091999-11-25 00:26:21 +1100575 if (strchr(new_comment, '\n'))
576 *strchr(new_comment, '\n') = 0;
577 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000578
Damien Miller95def091999-11-25 00:26:21 +1100579 /* Save the file using the new passphrase. */
Damien Millereba71ba2000-04-29 23:57:08 +1000580 if (!save_private_key(identity_file, passphrase, private, new_comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100581 printf("Saving the key failed: %s: %s.\n",
582 identity_file, strerror(errno));
583 memset(passphrase, 0, strlen(passphrase));
584 xfree(passphrase);
Damien Millereba71ba2000-04-29 23:57:08 +1000585 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100586 xfree(comment);
587 exit(1);
588 }
Damien Miller95def091999-11-25 00:26:21 +1100589 memset(passphrase, 0, strlen(passphrase));
590 xfree(passphrase);
Damien Millereba71ba2000-04-29 23:57:08 +1000591 key_free(private);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000592
Damien Miller95def091999-11-25 00:26:21 +1100593 strlcat(identity_file, ".pub", sizeof(identity_file));
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000594 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
595 if (fd == -1) {
Damien Miller95def091999-11-25 00:26:21 +1100596 printf("Could not save your public key in %s\n", identity_file);
597 exit(1);
598 }
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000599 f = fdopen(fd, "w");
600 if (f == NULL) {
601 printf("fdopen %s failed", identity_file);
602 exit(1);
603 }
Damien Millereba71ba2000-04-29 23:57:08 +1000604 if (!key_write(public, f))
605 fprintf(stderr, "write key failed");
606 key_free(public);
607 fprintf(f, " %s\n", new_comment);
Damien Miller95def091999-11-25 00:26:21 +1100608 fclose(f);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000609
Damien Miller95def091999-11-25 00:26:21 +1100610 xfree(comment);
611
612 printf("The comment in your key file has been changed.\n");
613 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000614}
615
Damien Miller431f66b1999-11-21 18:31:57 +1100616void
617usage(void)
618{
Ben Lindstromf1107f52001-03-22 02:05:32 +0000619 printf("Usage: %s [-lBpqxXyc] [-t type] [-b bits] [-f file] [-C comment] "
Ben Lindstromb7c92322001-03-05 05:10:52 +0000620 "[-N new-pass] [-P pass]\n", __progname);
Damien Miller95def091999-11-25 00:26:21 +1100621 exit(1);
Damien Miller431f66b1999-11-21 18:31:57 +1100622}
623
Damien Miller95def091999-11-25 00:26:21 +1100624/*
625 * Main program for key management.
626 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000627int
628main(int ac, char **av)
629{
Damien Miller95def091999-11-25 00:26:21 +1100630 char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2;
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000631 Key *private, *public;
Damien Miller95def091999-11-25 00:26:21 +1100632 struct passwd *pw;
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000633 int opt, type, fd;
Damien Miller95def091999-11-25 00:26:21 +1100634 struct stat st;
635 FILE *f;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100636
Damien Miller95def091999-11-25 00:26:21 +1100637 extern int optind;
638 extern char *optarg;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000639
Ben Lindstrom49a79c02000-11-17 03:47:20 +0000640 __progname = get_progname(av[0]);
Damien Millerf9b625c2000-07-09 22:42:32 +1000641 init_rng();
Damien Miller60bc5172001-03-19 09:38:15 +1100642 seed_rng();
Damien Millerf9b625c2000-07-09 22:42:32 +1000643
Damien Millerd3a18572000-06-07 19:55:44 +1000644 SSLeay_add_all_algorithms();
Damien Millereba71ba2000-04-29 23:57:08 +1000645
Damien Miller5428f641999-11-25 11:54:57 +1100646 /* we need this for the home * directory. */
Damien Miller95def091999-11-25 00:26:21 +1100647 pw = getpwuid(getuid());
648 if (!pw) {
649 printf("You don't exist, go away!\n");
650 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000651 }
Damien Millereba71ba2000-04-29 23:57:08 +1000652 if (gethostname(hostname, sizeof(hostname)) < 0) {
653 perror("gethostname");
654 exit(1);
655 }
Damien Miller5428f641999-11-25 11:54:57 +1100656
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000657 while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) {
Damien Miller95def091999-11-25 00:26:21 +1100658 switch (opt) {
659 case 'b':
660 bits = atoi(optarg);
661 if (bits < 512 || bits > 32768) {
662 printf("Bits has bad value.\n");
663 exit(1);
664 }
665 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000666
Damien Miller95def091999-11-25 00:26:21 +1100667 case 'l':
668 print_fingerprint = 1;
669 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000670
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000671 case 'B':
672 print_bubblebabble = 1;
673 break;
674
Damien Miller95def091999-11-25 00:26:21 +1100675 case 'p':
676 change_passphrase = 1;
677 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000678
Damien Miller95def091999-11-25 00:26:21 +1100679 case 'c':
680 change_comment = 1;
681 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000682
Damien Miller95def091999-11-25 00:26:21 +1100683 case 'f':
684 strlcpy(identity_file, optarg, sizeof(identity_file));
685 have_identity = 1;
686 break;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000687
Damien Miller95def091999-11-25 00:26:21 +1100688 case 'P':
689 identity_passphrase = optarg;
690 break;
691
692 case 'N':
693 identity_new_passphrase = optarg;
694 break;
695
696 case 'C':
697 identity_comment = optarg;
698 break;
699
700 case 'q':
701 quiet = 1;
702 break;
703
Damien Millereba71ba2000-04-29 23:57:08 +1000704 case 'R':
Damien Miller0bc1bd82000-11-13 22:57:25 +1100705 /* unused */
706 exit(0);
Damien Millereba71ba2000-04-29 23:57:08 +1000707 break;
708
709 case 'x':
710 convert_to_ssh2 = 1;
711 break;
712
713 case 'X':
714 convert_from_ssh2 = 1;
715 break;
716
717 case 'y':
718 print_public = 1;
719 break;
720
721 case 'd':
Damien Miller0bc1bd82000-11-13 22:57:25 +1100722 key_type_name = "dsa";
Damien Millereba71ba2000-04-29 23:57:08 +1000723 break;
724
Damien Miller0bc1bd82000-11-13 22:57:25 +1100725 case 't':
726 key_type_name = optarg;
Damien Miller0bc1bd82000-11-13 22:57:25 +1100727 break;
728
Damien Miller95def091999-11-25 00:26:21 +1100729 case '?':
730 default:
731 usage();
732 }
733 }
734 if (optind < ac) {
735 printf("Too many arguments.\n");
736 usage();
737 }
738 if (change_passphrase && change_comment) {
739 printf("Can only have one of -p and -c.\n");
740 usage();
741 }
Ben Lindstrom8fd372b2001-03-12 03:02:17 +0000742 if (print_fingerprint || print_bubblebabble)
Damien Miller95def091999-11-25 00:26:21 +1100743 do_fingerprint(pw);
Damien Miller95def091999-11-25 00:26:21 +1100744 if (change_passphrase)
745 do_change_passphrase(pw);
Damien Miller95def091999-11-25 00:26:21 +1100746 if (change_comment)
747 do_change_comment(pw);
Damien Millereba71ba2000-04-29 23:57:08 +1000748 if (convert_to_ssh2)
749 do_convert_to_ssh2(pw);
750 if (convert_from_ssh2)
751 do_convert_from_ssh2(pw);
752 if (print_public)
753 do_print_public(pw);
Damien Miller95def091999-11-25 00:26:21 +1100754
755 arc4random_stir();
756
Damien Millere39cacc2000-11-29 12:18:44 +1100757 type = key_type_from_name(key_type_name);
758 if (type == KEY_UNSPEC) {
759 fprintf(stderr, "unknown key type %s\n", key_type_name);
760 exit(1);
Damien Millereba71ba2000-04-29 23:57:08 +1000761 }
Damien Miller0bc1bd82000-11-13 22:57:25 +1100762 if (!quiet)
Damien Millere39cacc2000-11-29 12:18:44 +1100763 printf("Generating public/private %s key pair.\n", key_type_name);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100764 private = key_generate(type, bits);
765 if (private == NULL) {
766 fprintf(stderr, "key_generate failed");
767 exit(1);
768 }
769 public = key_from_private(private);
Damien Miller95def091999-11-25 00:26:21 +1100770
771 if (!have_identity)
772 ask_filename(pw, "Enter file in which to save the key");
773
774 /* Create ~/.ssh directory if it doesn\'t already exist. */
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000775 snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
Damien Miller95def091999-11-25 00:26:21 +1100776 if (strstr(identity_file, dotsshdir) != NULL &&
777 stat(dotsshdir, &st) < 0) {
Damien Millerbe484b52000-07-15 14:14:16 +1000778 if (mkdir(dotsshdir, 0700) < 0)
Damien Miller95def091999-11-25 00:26:21 +1100779 error("Could not create directory '%s'.", dotsshdir);
780 else if (!quiet)
781 printf("Created directory '%s'.\n", dotsshdir);
782 }
783 /* If the file already exists, ask the user to confirm. */
784 if (stat(identity_file, &st) >= 0) {
785 char yesno[3];
786 printf("%s already exists.\n", identity_file);
787 printf("Overwrite (y/n)? ");
788 fflush(stdout);
789 if (fgets(yesno, sizeof(yesno), stdin) == NULL)
790 exit(1);
791 if (yesno[0] != 'y' && yesno[0] != 'Y')
792 exit(1);
793 }
794 /* Ask for a passphrase (twice). */
795 if (identity_passphrase)
796 passphrase1 = xstrdup(identity_passphrase);
797 else if (identity_new_passphrase)
798 passphrase1 = xstrdup(identity_new_passphrase);
799 else {
800passphrase_again:
801 passphrase1 =
802 read_passphrase("Enter passphrase (empty for no passphrase): ", 1);
803 passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
804 if (strcmp(passphrase1, passphrase2) != 0) {
805 /* The passphrases do not match. Clear them and retry. */
806 memset(passphrase1, 0, strlen(passphrase1));
807 memset(passphrase2, 0, strlen(passphrase2));
808 xfree(passphrase1);
809 xfree(passphrase2);
810 printf("Passphrases do not match. Try again.\n");
811 goto passphrase_again;
812 }
813 /* Clear the other copy of the passphrase. */
814 memset(passphrase2, 0, strlen(passphrase2));
815 xfree(passphrase2);
816 }
817
Damien Miller95def091999-11-25 00:26:21 +1100818 if (identity_comment) {
819 strlcpy(comment, identity_comment, sizeof(comment));
820 } else {
Damien Miller4af51302000-04-16 11:18:38 +1000821 /* Create default commend field for the passphrase. */
Damien Miller95def091999-11-25 00:26:21 +1100822 snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
823 }
824
825 /* Save the key with the given passphrase and comment. */
Damien Millereba71ba2000-04-29 23:57:08 +1000826 if (!save_private_key(identity_file, passphrase1, private, comment)) {
Damien Miller95def091999-11-25 00:26:21 +1100827 printf("Saving the key failed: %s: %s.\n",
Damien Millereba71ba2000-04-29 23:57:08 +1000828 identity_file, strerror(errno));
Damien Miller95def091999-11-25 00:26:21 +1100829 memset(passphrase1, 0, strlen(passphrase1));
830 xfree(passphrase1);
831 exit(1);
832 }
833 /* Clear the passphrase. */
834 memset(passphrase1, 0, strlen(passphrase1));
835 xfree(passphrase1);
836
837 /* Clear the private key and the random number generator. */
Damien Miller0bc1bd82000-11-13 22:57:25 +1100838 key_free(private);
Damien Miller95def091999-11-25 00:26:21 +1100839 arc4random_stir();
840
841 if (!quiet)
842 printf("Your identification has been saved in %s.\n", identity_file);
843
Damien Miller95def091999-11-25 00:26:21 +1100844 strlcat(identity_file, ".pub", sizeof(identity_file));
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000845 fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
846 if (fd == -1) {
Damien Miller95def091999-11-25 00:26:21 +1100847 printf("Could not save your public key in %s\n", identity_file);
848 exit(1);
849 }
Ben Lindstrom5fc62702001-03-09 18:19:24 +0000850 f = fdopen(fd, "w");
851 if (f == NULL) {
852 printf("fdopen %s failed", identity_file);
853 exit(1);
854 }
Damien Millereba71ba2000-04-29 23:57:08 +1000855 if (!key_write(public, f))
856 fprintf(stderr, "write key failed");
857 fprintf(f, " %s\n", comment);
Damien Miller95def091999-11-25 00:26:21 +1100858 fclose(f);
859
860 if (!quiet) {
Ben Lindstromcfccef92001-03-13 04:57:58 +0000861 char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
Damien Millereba71ba2000-04-29 23:57:08 +1000862 printf("Your public key has been saved in %s.\n",
863 identity_file);
Damien Miller95def091999-11-25 00:26:21 +1100864 printf("The key fingerprint is:\n");
Ben Lindstromcfccef92001-03-13 04:57:58 +0000865 printf("%s %s\n", fp, comment);
866 xfree(fp);
Damien Miller95def091999-11-25 00:26:21 +1100867 }
Damien Millereba71ba2000-04-29 23:57:08 +1000868
869 key_free(public);
Damien Miller95def091999-11-25 00:26:21 +1100870 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000871}