Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.96
1.1 deraadt 1: /*
1.13 deraadt 2: * Author: Tatu Ylonen <ylo@cs.hut.fi>
3: * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4: * All rights reserved
5: * Identity and host key generation and maintenance.
1.31 deraadt 6: *
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".
1.13 deraadt 12: */
1.1 deraadt 13:
14: #include "includes.h"
1.96 ! rees 15: RCSID("$OpenBSD: ssh-keygen.c,v 1.95 2002/03/21 16:54:53 markus Exp $");
1.19 markus 16:
17: #include <openssl/evp.h>
18: #include <openssl/pem.h>
1.1 deraadt 19:
20: #include "xmalloc.h"
1.19 markus 21: #include "key.h"
1.53 markus 22: #include "rsa.h"
1.19 markus 23: #include "authfile.h"
24: #include "uuencode.h"
1.32 markus 25: #include "buffer.h"
26: #include "bufaux.h"
1.40 markus 27: #include "pathnames.h"
1.41 markus 28: #include "log.h"
29: #include "readpass.h"
1.32 markus 30:
1.75 markus 31: #ifdef SMARTCARD
32: #include "scard.h"
1.79 jakob 33: #endif
1.66 markus 34:
1.19 markus 35: /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */
1.1 deraadt 36: int bits = 1024;
37:
1.14 markus 38: /*
39: * Flag indicating that we just want to change the passphrase. This can be
40: * set on the command line.
41: */
1.1 deraadt 42: int change_passphrase = 0;
43:
1.14 markus 44: /*
45: * Flag indicating that we just want to change the comment. This can be set
46: * on the command line.
47: */
1.1 deraadt 48: int change_comment = 0;
49:
1.2 provos 50: int quiet = 0;
51:
1.8 markus 52: /* Flag indicating that we just want to see the key fingerprint */
53: int print_fingerprint = 0;
1.49 markus 54: int print_bubblebabble = 0;
1.8 markus 55:
1.10 markus 56: /* The identity file name, given on the command line or entered by the user. */
57: char identity_file[1024];
58: int have_identity = 0;
1.1 deraadt 59:
60: /* This is set to the passphrase if given on the command line. */
61: char *identity_passphrase = NULL;
62:
63: /* This is set to the new passphrase if given on the command line. */
64: char *identity_new_passphrase = NULL;
65:
66: /* This is set to the new comment if given on the command line. */
67: char *identity_comment = NULL;
68:
1.19 markus 69: /* Dump public key file in format used by real and the original SSH 2 */
70: int convert_to_ssh2 = 0;
71: int convert_from_ssh2 = 0;
72: int print_public = 0;
1.33 markus 73:
1.87 djm 74: char *key_type_name = NULL;
1.19 markus 75:
1.10 markus 76: /* argv0 */
77: extern char *__progname;
1.1 deraadt 78:
1.19 markus 79: char hostname[MAXHOSTNAMELEN];
80:
1.63 itojun 81: static void
1.10 markus 82: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 83: {
1.12 markus 84: char buf[1024];
1.35 markus 85: char *name = NULL;
86:
1.92 stevesk 87: if (key_type_name == NULL)
1.40 markus 88: name = _PATH_SSH_CLIENT_ID_RSA;
1.92 stevesk 89: else
90: switch (key_type_from_name(key_type_name)) {
91: case KEY_RSA1:
92: name = _PATH_SSH_CLIENT_IDENTITY;
93: break;
94: case KEY_DSA:
95: name = _PATH_SSH_CLIENT_ID_DSA;
96: break;
97: case KEY_RSA:
98: name = _PATH_SSH_CLIENT_ID_RSA;
99: break;
100: default:
101: fprintf(stderr, "bad key type");
102: exit(1);
103: break;
104: }
105:
1.35 markus 106: snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
1.37 markus 107: fprintf(stderr, "%s (%s): ", prompt, identity_file);
108: fflush(stderr);
1.12 markus 109: if (fgets(buf, sizeof(buf), stdin) == NULL)
110: exit(1);
111: if (strchr(buf, '\n'))
112: *strchr(buf, '\n') = 0;
113: if (strcmp(buf, "") != 0)
114: strlcpy(identity_file, buf, sizeof(identity_file));
115: have_identity = 1;
1.7 markus 116: }
117:
1.63 itojun 118: static Key *
1.61 markus 119: load_identity(char *filename)
1.19 markus 120: {
1.52 markus 121: char *pass;
122: Key *prv;
123:
1.55 markus 124: prv = key_load_private(filename, "", NULL);
1.52 markus 125: if (prv == NULL) {
1.61 markus 126: if (identity_passphrase)
127: pass = xstrdup(identity_passphrase);
128: else
1.65 markus 129: pass = read_passphrase("Enter passphrase: ",
130: RP_ALLOW_STDIN);
1.52 markus 131: prv = key_load_private(filename, pass, NULL);
1.19 markus 132: memset(pass, 0, strlen(pass));
133: xfree(pass);
134: }
1.52 markus 135: return prv;
1.19 markus 136: }
137:
1.32 markus 138: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
139: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
140: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 141: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 142:
1.63 itojun 143: static void
1.19 markus 144: do_convert_to_ssh2(struct passwd *pw)
145: {
1.59 markus 146: Key *k;
1.94 markus 147: u_int len;
1.36 markus 148: u_char *blob;
1.19 markus 149: struct stat st;
150:
151: if (!have_identity)
152: ask_filename(pw, "Enter file in which the key is");
153: if (stat(identity_file, &st) < 0) {
154: perror(identity_file);
155: exit(1);
156: }
1.59 markus 157: if ((k = key_load_public(identity_file, NULL)) == NULL) {
1.61 markus 158: if ((k = load_identity(identity_file)) == NULL) {
1.59 markus 159: fprintf(stderr, "load failed\n");
160: exit(1);
161: }
1.19 markus 162: }
1.81 markus 163: if (key_to_blob(k, &blob, &len) <= 0) {
164: fprintf(stderr, "key_to_blob failed\n");
165: exit(1);
166: }
1.32 markus 167: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.19 markus 168: fprintf(stdout,
1.32 markus 169: "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n",
1.59 markus 170: key_size(k), key_type(k),
1.19 markus 171: pw->pw_name, hostname);
172: dump_base64(stdout, blob, len);
1.32 markus 173: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.59 markus 174: key_free(k);
1.21 markus 175: xfree(blob);
1.19 markus 176: exit(0);
177: }
178:
1.63 itojun 179: static void
1.32 markus 180: buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
181: {
182: int bits = buffer_get_int(b);
183: int bytes = (bits + 7) / 8;
1.53 markus 184:
1.32 markus 185: if (buffer_len(b) < bytes)
1.53 markus 186: fatal("buffer_get_bignum_bits: input buffer too small: "
187: "need %d have %d", bytes, buffer_len(b));
1.89 stevesk 188: BN_bin2bn(buffer_ptr(b), bytes, value);
1.32 markus 189: buffer_consume(b, bytes);
190: }
191:
1.63 itojun 192: static Key *
1.93 markus 193: do_convert_private_ssh2_from_blob(u_char *blob, u_int blen)
1.32 markus 194: {
195: Buffer b;
196: Key *key = NULL;
1.64 markus 197: char *type, *cipher;
1.69 stevesk 198: u_char *sig, data[] = "abcde12345";
1.62 markus 199: int magic, rlen, ktype, i1, i2, i3, i4;
1.64 markus 200: u_int slen;
1.62 markus 201: u_long e;
1.32 markus 202:
203: buffer_init(&b);
204: buffer_append(&b, blob, blen);
205:
206: magic = buffer_get_int(&b);
207: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
208: error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
209: buffer_free(&b);
210: return NULL;
211: }
1.62 markus 212: i1 = buffer_get_int(&b);
1.32 markus 213: type = buffer_get_string(&b, NULL);
214: cipher = buffer_get_string(&b, NULL);
1.62 markus 215: i2 = buffer_get_int(&b);
216: i3 = buffer_get_int(&b);
217: i4 = buffer_get_int(&b);
218: debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
1.32 markus 219: if (strcmp(cipher, "none") != 0) {
220: error("unsupported cipher %s", cipher);
221: xfree(cipher);
222: buffer_free(&b);
1.53 markus 223: xfree(type);
1.32 markus 224: return NULL;
225: }
226: xfree(cipher);
227:
1.53 markus 228: if (strstr(type, "dsa")) {
229: ktype = KEY_DSA;
230: } else if (strstr(type, "rsa")) {
231: ktype = KEY_RSA;
232: } else {
233: xfree(type);
1.32 markus 234: return NULL;
235: }
1.53 markus 236: key = key_new_private(ktype);
237: xfree(type);
238:
239: switch (key->type) {
240: case KEY_DSA:
241: buffer_get_bignum_bits(&b, key->dsa->p);
242: buffer_get_bignum_bits(&b, key->dsa->g);
243: buffer_get_bignum_bits(&b, key->dsa->q);
244: buffer_get_bignum_bits(&b, key->dsa->pub_key);
245: buffer_get_bignum_bits(&b, key->dsa->priv_key);
246: break;
247: case KEY_RSA:
1.62 markus 248: e = buffer_get_char(&b);
249: debug("e %lx", e);
250: if (e < 30) {
251: e <<= 8;
252: e += buffer_get_char(&b);
253: debug("e %lx", e);
254: e <<= 8;
255: e += buffer_get_char(&b);
256: debug("e %lx", e);
257: }
258: if (!BN_set_word(key->rsa->e, e)) {
1.53 markus 259: buffer_free(&b);
260: key_free(key);
261: return NULL;
262: }
263: buffer_get_bignum_bits(&b, key->rsa->d);
264: buffer_get_bignum_bits(&b, key->rsa->n);
265: buffer_get_bignum_bits(&b, key->rsa->iqmp);
266: buffer_get_bignum_bits(&b, key->rsa->q);
267: buffer_get_bignum_bits(&b, key->rsa->p);
1.68 markus 268: rsa_generate_additional_parameters(key->rsa);
1.53 markus 269: break;
270: }
1.32 markus 271: rlen = buffer_len(&b);
1.85 deraadt 272: if (rlen != 0)
1.53 markus 273: error("do_convert_private_ssh2_from_blob: "
274: "remaining bytes in key blob %d", rlen);
1.32 markus 275: buffer_free(&b);
1.64 markus 276:
277: /* try the key */
278: key_sign(key, &sig, &slen, data, sizeof(data));
279: key_verify(key, sig, slen, data, sizeof(data));
280: xfree(sig);
1.32 markus 281: return key;
282: }
283:
1.63 itojun 284: static void
1.19 markus 285: do_convert_from_ssh2(struct passwd *pw)
286: {
287: Key *k;
288: int blen;
289: char line[1024], *p;
1.80 stevesk 290: u_char blob[8096];
1.19 markus 291: char encoded[8096];
292: struct stat st;
1.32 markus 293: int escaped = 0, private = 0, ok;
1.19 markus 294: FILE *fp;
295:
296: if (!have_identity)
297: ask_filename(pw, "Enter file in which the key is");
298: if (stat(identity_file, &st) < 0) {
299: perror(identity_file);
300: exit(1);
301: }
302: fp = fopen(identity_file, "r");
303: if (fp == NULL) {
304: perror(identity_file);
305: exit(1);
306: }
307: encoded[0] = '\0';
308: while (fgets(line, sizeof(line), fp)) {
1.25 markus 309: if (!(p = strchr(line, '\n'))) {
310: fprintf(stderr, "input line too long.\n");
311: exit(1);
312: }
313: if (p > line && p[-1] == '\\')
314: escaped++;
1.19 markus 315: if (strncmp(line, "----", 4) == 0 ||
316: strstr(line, ": ") != NULL) {
1.32 markus 317: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
318: private = 1;
1.64 markus 319: if (strstr(line, " END ") != NULL) {
320: break;
321: }
1.60 markus 322: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 323: continue;
324: }
1.25 markus 325: if (escaped) {
326: escaped--;
1.60 markus 327: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 328: continue;
1.19 markus 329: }
330: *p = '\0';
331: strlcat(encoded, line, sizeof(encoded));
332: }
1.91 stevesk 333: blen = uudecode(encoded, blob, sizeof(blob));
1.19 markus 334: if (blen < 0) {
335: fprintf(stderr, "uudecode failed.\n");
336: exit(1);
337: }
1.32 markus 338: k = private ?
339: do_convert_private_ssh2_from_blob(blob, blen) :
1.33 markus 340: key_from_blob(blob, blen);
1.32 markus 341: if (k == NULL) {
342: fprintf(stderr, "decode blob failed.\n");
343: exit(1);
344: }
345: ok = private ?
1.53 markus 346: (k->type == KEY_DSA ?
347: PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
348: PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
1.32 markus 349: key_write(k, stdout);
350: if (!ok) {
351: fprintf(stderr, "key write failed");
352: exit(1);
353: }
1.19 markus 354: key_free(k);
1.90 markus 355: if (!private)
356: fprintf(stdout, "\n");
1.19 markus 357: fclose(fp);
358: exit(0);
359: }
360:
1.63 itojun 361: static void
1.19 markus 362: do_print_public(struct passwd *pw)
363: {
1.52 markus 364: Key *prv;
1.19 markus 365: struct stat st;
366:
367: if (!have_identity)
368: ask_filename(pw, "Enter file in which the key is");
369: if (stat(identity_file, &st) < 0) {
370: perror(identity_file);
371: exit(1);
372: }
1.61 markus 373: prv = load_identity(identity_file);
1.52 markus 374: if (prv == NULL) {
1.19 markus 375: fprintf(stderr, "load failed\n");
376: exit(1);
377: }
1.52 markus 378: if (!key_write(prv, stdout))
1.19 markus 379: fprintf(stderr, "key_write failed");
1.52 markus 380: key_free(prv);
1.19 markus 381: fprintf(stdout, "\n");
382: exit(0);
383: }
384:
1.74 markus 385: #ifdef SMARTCARD
1.66 markus 386: static void
1.75 markus 387: do_upload(struct passwd *pw, const char *sc_reader_id)
1.66 markus 388: {
389: Key *prv = NULL;
390: struct stat st;
1.95 markus 391: int ret;
1.66 markus 392:
393: if (!have_identity)
394: ask_filename(pw, "Enter file in which the key is");
395: if (stat(identity_file, &st) < 0) {
396: perror(identity_file);
1.95 markus 397: exit(1);
1.66 markus 398: }
399: prv = load_identity(identity_file);
400: if (prv == NULL) {
401: error("load failed");
1.95 markus 402: exit(1);
1.66 markus 403: }
1.95 markus 404: ret = sc_put_key(prv, sc_reader_id);
405: key_free(prv);
406: if (ret < 0)
407: exit(1);
408: log("loading key done");
409: exit(0);
1.74 markus 410: }
1.75 markus 411:
412: static void
413: do_download(struct passwd *pw, const char *sc_reader_id)
414: {
415: Key *pub = NULL;
416:
1.96 ! rees 417: pub = sc_get_key(sc_reader_id, NULL);
1.75 markus 418: if (pub == NULL)
419: fatal("cannot read public key from smartcard");
420: key_write(pub, stdout);
421: key_free(pub);
422: fprintf(stdout, "\n");
423: exit(0);
424: }
1.78 jakob 425: #endif /* SMARTCARD */
1.66 markus 426:
1.63 itojun 427: static void
1.8 markus 428: do_fingerprint(struct passwd *pw)
429: {
1.15 markus 430: FILE *f;
1.19 markus 431: Key *public;
1.49 markus 432: char *comment = NULL, *cp, *ep, line[16*1024], *fp;
1.84 stevesk 433: int i, skip = 0, num = 1, invalid = 1;
434: enum fp_rep rep;
435: enum fp_type fptype;
1.12 markus 436: struct stat st;
437:
1.52 markus 438: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
439: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 440:
1.12 markus 441: if (!have_identity)
442: ask_filename(pw, "Enter file in which the key is");
443: if (stat(identity_file, &st) < 0) {
444: perror(identity_file);
445: exit(1);
446: }
1.52 markus 447: public = key_load_public(identity_file, &comment);
448: if (public != NULL) {
449: fp = key_fingerprint(public, fptype, rep);
450: printf("%d %s %s\n", key_size(public), fp, comment);
1.33 markus 451: key_free(public);
452: xfree(comment);
1.49 markus 453: xfree(fp);
1.15 markus 454: exit(0);
455: }
1.52 markus 456: if (comment)
457: xfree(comment);
1.15 markus 458:
459: f = fopen(identity_file, "r");
460: if (f != NULL) {
461: while (fgets(line, sizeof(line), f)) {
462: i = strlen(line) - 1;
463: if (line[i] != '\n') {
464: error("line %d too long: %.40s...", num, line);
465: skip = 1;
466: continue;
467: }
468: num++;
469: if (skip) {
470: skip = 0;
471: continue;
472: }
473: line[i] = '\0';
474:
475: /* Skip leading whitespace, empty and comment lines. */
476: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
477: ;
478: if (!*cp || *cp == '\n' || *cp == '#')
479: continue ;
480: i = strtol(cp, &ep, 10);
481: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
482: int quoted = 0;
483: comment = cp;
484: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
485: if (*cp == '\\' && cp[1] == '"')
486: cp++; /* Skip both */
487: else if (*cp == '"')
488: quoted = !quoted;
489: }
490: if (!*cp)
491: continue;
492: *cp++ = '\0';
493: }
494: ep = cp;
1.38 markus 495: public = key_new(KEY_RSA1);
496: if (key_read(public, &cp) != 1) {
497: cp = ep;
498: key_free(public);
499: public = key_new(KEY_UNSPEC);
500: if (key_read(public, &cp) != 1) {
501: key_free(public);
502: continue;
503: }
1.12 markus 504: }
1.38 markus 505: comment = *cp ? cp : comment;
1.52 markus 506: fp = key_fingerprint(public, fptype, rep);
1.49 markus 507: printf("%d %s %s\n", key_size(public), fp,
1.38 markus 508: comment ? comment : "no comment");
1.49 markus 509: xfree(fp);
1.52 markus 510: key_free(public);
1.38 markus 511: invalid = 0;
1.12 markus 512: }
1.15 markus 513: fclose(f);
514: }
515: if (invalid) {
1.83 markus 516: printf("%s is not a public key file.\n", identity_file);
1.15 markus 517: exit(1);
1.12 markus 518: }
519: exit(0);
1.8 markus 520: }
521:
1.13 deraadt 522: /*
523: * Perform changing a passphrase. The argument is the passwd structure
524: * for the current user.
525: */
1.63 itojun 526: static void
1.7 markus 527: do_change_passphrase(struct passwd *pw)
528: {
1.12 markus 529: char *comment;
530: char *old_passphrase, *passphrase1, *passphrase2;
531: struct stat st;
1.19 markus 532: Key *private;
1.12 markus 533:
534: if (!have_identity)
535: ask_filename(pw, "Enter file in which the key is");
536: if (stat(identity_file, &st) < 0) {
537: perror(identity_file);
538: exit(1);
539: }
540: /* Try to load the file with empty passphrase. */
1.52 markus 541: private = key_load_private(identity_file, "", &comment);
542: if (private == NULL) {
1.12 markus 543: if (identity_passphrase)
544: old_passphrase = xstrdup(identity_passphrase);
545: else
1.65 markus 546: old_passphrase =
547: read_passphrase("Enter old passphrase: ",
548: RP_ALLOW_STDIN);
549: private = key_load_private(identity_file, old_passphrase,
550: &comment);
1.52 markus 551: memset(old_passphrase, 0, strlen(old_passphrase));
552: xfree(old_passphrase);
553: if (private == NULL) {
1.12 markus 554: printf("Bad passphrase.\n");
555: exit(1);
556: }
557: }
558: printf("Key has comment '%s'\n", comment);
559:
560: /* Ask the new passphrase (twice). */
561: if (identity_new_passphrase) {
562: passphrase1 = xstrdup(identity_new_passphrase);
563: passphrase2 = NULL;
564: } else {
565: passphrase1 =
1.65 markus 566: read_passphrase("Enter new passphrase (empty for no "
567: "passphrase): ", RP_ALLOW_STDIN);
568: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 569: RP_ALLOW_STDIN);
1.12 markus 570:
571: /* Verify that they are the same. */
572: if (strcmp(passphrase1, passphrase2) != 0) {
573: memset(passphrase1, 0, strlen(passphrase1));
574: memset(passphrase2, 0, strlen(passphrase2));
575: xfree(passphrase1);
576: xfree(passphrase2);
577: printf("Pass phrases do not match. Try again.\n");
578: exit(1);
579: }
580: /* Destroy the other copy. */
581: memset(passphrase2, 0, strlen(passphrase2));
582: xfree(passphrase2);
583: }
584:
585: /* Save the file using the new passphrase. */
1.52 markus 586: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 587: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 588: memset(passphrase1, 0, strlen(passphrase1));
589: xfree(passphrase1);
1.19 markus 590: key_free(private);
1.12 markus 591: xfree(comment);
592: exit(1);
593: }
594: /* Destroy the passphrase and the copy of the key in memory. */
595: memset(passphrase1, 0, strlen(passphrase1));
596: xfree(passphrase1);
1.19 markus 597: key_free(private); /* Destroys contents */
1.12 markus 598: xfree(comment);
1.1 deraadt 599:
1.12 markus 600: printf("Your identification has been saved with the new passphrase.\n");
601: exit(0);
1.1 deraadt 602: }
603:
1.13 deraadt 604: /*
605: * Change the comment of a private key file.
606: */
1.63 itojun 607: static void
1.2 provos 608: do_change_comment(struct passwd *pw)
1.1 deraadt 609: {
1.46 deraadt 610: char new_comment[1024], *comment, *passphrase;
1.52 markus 611: Key *private;
612: Key *public;
1.12 markus 613: struct stat st;
614: FILE *f;
1.46 deraadt 615: int fd;
1.12 markus 616:
617: if (!have_identity)
618: ask_filename(pw, "Enter file in which the key is");
619: if (stat(identity_file, &st) < 0) {
620: perror(identity_file);
621: exit(1);
622: }
1.52 markus 623: private = key_load_private(identity_file, "", &comment);
624: if (private == NULL) {
1.12 markus 625: if (identity_passphrase)
626: passphrase = xstrdup(identity_passphrase);
627: else if (identity_new_passphrase)
628: passphrase = xstrdup(identity_new_passphrase);
629: else
1.65 markus 630: passphrase = read_passphrase("Enter passphrase: ",
631: RP_ALLOW_STDIN);
1.12 markus 632: /* Try to load using the passphrase. */
1.52 markus 633: private = key_load_private(identity_file, passphrase, &comment);
634: if (private == NULL) {
1.12 markus 635: memset(passphrase, 0, strlen(passphrase));
636: xfree(passphrase);
637: printf("Bad passphrase.\n");
638: exit(1);
639: }
1.52 markus 640: } else {
641: passphrase = xstrdup("");
1.12 markus 642: }
1.52 markus 643: if (private->type != KEY_RSA1) {
644: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
645: key_free(private);
646: exit(1);
1.86 deraadt 647: }
1.12 markus 648: printf("Key now has comment '%s'\n", comment);
649:
650: if (identity_comment) {
651: strlcpy(new_comment, identity_comment, sizeof(new_comment));
652: } else {
653: printf("Enter new comment: ");
654: fflush(stdout);
655: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
656: memset(passphrase, 0, strlen(passphrase));
1.19 markus 657: key_free(private);
1.12 markus 658: exit(1);
659: }
660: if (strchr(new_comment, '\n'))
661: *strchr(new_comment, '\n') = 0;
662: }
663:
664: /* Save the file using the new passphrase. */
1.52 markus 665: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 666: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 667: memset(passphrase, 0, strlen(passphrase));
668: xfree(passphrase);
1.19 markus 669: key_free(private);
1.12 markus 670: xfree(comment);
671: exit(1);
672: }
673: memset(passphrase, 0, strlen(passphrase));
674: xfree(passphrase);
1.52 markus 675: public = key_from_private(private);
1.19 markus 676: key_free(private);
1.12 markus 677:
678: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 679: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
680: if (fd == -1) {
1.12 markus 681: printf("Could not save your public key in %s\n", identity_file);
682: exit(1);
683: }
1.46 deraadt 684: f = fdopen(fd, "w");
685: if (f == NULL) {
686: printf("fdopen %s failed", identity_file);
687: exit(1);
688: }
1.19 markus 689: if (!key_write(public, f))
690: fprintf(stderr, "write key failed");
691: key_free(public);
692: fprintf(f, " %s\n", new_comment);
1.12 markus 693: fclose(f);
1.1 deraadt 694:
1.12 markus 695: xfree(comment);
1.1 deraadt 696:
1.12 markus 697: printf("The comment in your key file has been changed.\n");
698: exit(0);
1.1 deraadt 699: }
700:
1.63 itojun 701: static void
1.10 markus 702: usage(void)
703: {
1.77 jakob 704: fprintf(stderr, "Usage: %s [options]\n", __progname);
705: fprintf(stderr, "Options:\n");
706: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
707: fprintf(stderr, " -c Change comment in private and public key files.\n");
708: fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
709: fprintf(stderr, " -f filename Filename of the key file.\n");
710: fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
711: fprintf(stderr, " -l Show fingerprint of key file.\n");
712: fprintf(stderr, " -p Change passphrase of private key file.\n");
713: fprintf(stderr, " -q Quiet.\n");
714: fprintf(stderr, " -y Read private key file and print public key.\n");
715: fprintf(stderr, " -t type Specify type of key to create.\n");
716: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
717: fprintf(stderr, " -C comment Provide new comment.\n");
718: fprintf(stderr, " -N phrase Provide new passphrase.\n");
719: fprintf(stderr, " -P phrase Provide old passphrase.\n");
720: #ifdef SMARTCARD
721: fprintf(stderr, " -D reader Download public key from smartcard.\n");
722: fprintf(stderr, " -U reader Upload private key to smartcard.\n");
723: #endif /* SMARTCARD */
724:
1.12 markus 725: exit(1);
1.10 markus 726: }
727:
1.13 deraadt 728: /*
729: * Main program for key management.
730: */
1.2 provos 731: int
732: main(int ac, char **av)
1.1 deraadt 733: {
1.87 djm 734: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.75 markus 735: char *reader_id = NULL;
1.46 deraadt 736: Key *private, *public;
1.12 markus 737: struct passwd *pw;
738: struct stat st;
1.75 markus 739: int opt, type, fd, download = 0;
1.12 markus 740: FILE *f;
1.33 markus 741:
1.12 markus 742: extern int optind;
743: extern char *optarg;
744:
1.26 markus 745: SSLeay_add_all_algorithms();
1.19 markus 746:
1.14 markus 747: /* we need this for the home * directory. */
1.12 markus 748: pw = getpwuid(getuid());
749: if (!pw) {
750: printf("You don't exist, go away!\n");
751: exit(1);
752: }
1.19 markus 753: if (gethostname(hostname, sizeof(hostname)) < 0) {
754: perror("gethostname");
755: exit(1);
756: }
1.14 markus 757:
1.76 jakob 758: while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) {
1.12 markus 759: switch (opt) {
760: case 'b':
761: bits = atoi(optarg);
762: if (bits < 512 || bits > 32768) {
763: printf("Bits has bad value.\n");
764: exit(1);
765: }
766: break;
767: case 'l':
768: print_fingerprint = 1;
769: break;
1.49 markus 770: case 'B':
771: print_bubblebabble = 1;
772: break;
1.12 markus 773: case 'p':
774: change_passphrase = 1;
775: break;
776: case 'c':
777: change_comment = 1;
778: break;
779: case 'f':
780: strlcpy(identity_file, optarg, sizeof(identity_file));
781: have_identity = 1;
782: break;
783: case 'P':
784: identity_passphrase = optarg;
785: break;
786: case 'N':
787: identity_new_passphrase = optarg;
788: break;
789: case 'C':
790: identity_comment = optarg;
791: break;
792: case 'q':
793: quiet = 1;
1.20 deraadt 794: break;
795: case 'R':
1.33 markus 796: /* unused */
797: exit(0);
1.12 markus 798: break;
1.57 markus 799: case 'e':
1.19 markus 800: case 'x':
1.57 markus 801: /* export key */
1.19 markus 802: convert_to_ssh2 = 1;
803: break;
1.57 markus 804: case 'i':
1.19 markus 805: case 'X':
1.57 markus 806: /* import key */
1.19 markus 807: convert_from_ssh2 = 1;
808: break;
809: case 'y':
810: print_public = 1;
1.47 jakob 811: break;
1.19 markus 812: case 'd':
1.33 markus 813: key_type_name = "dsa";
1.19 markus 814: break;
1.33 markus 815: case 't':
816: key_type_name = optarg;
817: break;
1.75 markus 818: case 'D':
819: download = 1;
1.76 jakob 820: case 'U':
1.75 markus 821: reader_id = optarg;
1.66 markus 822: break;
1.12 markus 823: case '?':
824: default:
825: usage();
826: }
827: }
828: if (optind < ac) {
829: printf("Too many arguments.\n");
1.87 djm 830: usage();
831: }
1.12 markus 832: if (change_passphrase && change_comment) {
833: printf("Can only have one of -p and -c.\n");
834: usage();
835: }
1.49 markus 836: if (print_fingerprint || print_bubblebabble)
1.12 markus 837: do_fingerprint(pw);
838: if (change_passphrase)
839: do_change_passphrase(pw);
840: if (change_comment)
841: do_change_comment(pw);
1.19 markus 842: if (convert_to_ssh2)
843: do_convert_to_ssh2(pw);
844: if (convert_from_ssh2)
845: do_convert_from_ssh2(pw);
846: if (print_public)
847: do_print_public(pw);
1.75 markus 848: if (reader_id != NULL) {
1.74 markus 849: #ifdef SMARTCARD
1.75 markus 850: if (download)
851: do_download(pw, reader_id);
852: else
853: do_upload(pw, reader_id);
1.78 jakob 854: #else /* SMARTCARD */
1.74 markus 855: fatal("no support for smartcards.");
1.78 jakob 856: #endif /* SMARTCARD */
1.75 markus 857: }
1.12 markus 858:
859: arc4random_stir();
860:
1.88 markus 861: if (key_type_name == NULL) {
862: printf("You must specify a key type (-t).\n");
863: usage();
864: }
1.35 markus 865: type = key_type_from_name(key_type_name);
866: if (type == KEY_UNSPEC) {
867: fprintf(stderr, "unknown key type %s\n", key_type_name);
868: exit(1);
1.19 markus 869: }
1.33 markus 870: if (!quiet)
1.35 markus 871: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 872: private = key_generate(type, bits);
873: if (private == NULL) {
874: fprintf(stderr, "key_generate failed");
875: exit(1);
876: }
877: public = key_from_private(private);
1.12 markus 878:
879: if (!have_identity)
880: ask_filename(pw, "Enter file in which to save the key");
881:
882: /* Create ~/.ssh directory if it doesn\'t already exist. */
1.40 markus 883: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1.12 markus 884: if (strstr(identity_file, dotsshdir) != NULL &&
885: stat(dotsshdir, &st) < 0) {
1.29 djm 886: if (mkdir(dotsshdir, 0700) < 0)
1.12 markus 887: error("Could not create directory '%s'.", dotsshdir);
888: else if (!quiet)
889: printf("Created directory '%s'.\n", dotsshdir);
890: }
891: /* If the file already exists, ask the user to confirm. */
892: if (stat(identity_file, &st) >= 0) {
893: char yesno[3];
894: printf("%s already exists.\n", identity_file);
895: printf("Overwrite (y/n)? ");
896: fflush(stdout);
897: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
898: exit(1);
899: if (yesno[0] != 'y' && yesno[0] != 'Y')
900: exit(1);
901: }
902: /* Ask for a passphrase (twice). */
903: if (identity_passphrase)
904: passphrase1 = xstrdup(identity_passphrase);
905: else if (identity_new_passphrase)
906: passphrase1 = xstrdup(identity_new_passphrase);
907: else {
908: passphrase_again:
909: passphrase1 =
1.65 markus 910: read_passphrase("Enter passphrase (empty for no "
911: "passphrase): ", RP_ALLOW_STDIN);
912: passphrase2 = read_passphrase("Enter same passphrase again: ",
913: RP_ALLOW_STDIN);
1.12 markus 914: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 915: /*
916: * The passphrases do not match. Clear them and
917: * retry.
918: */
1.12 markus 919: memset(passphrase1, 0, strlen(passphrase1));
920: memset(passphrase2, 0, strlen(passphrase2));
921: xfree(passphrase1);
922: xfree(passphrase2);
923: printf("Passphrases do not match. Try again.\n");
924: goto passphrase_again;
925: }
926: /* Clear the other copy of the passphrase. */
927: memset(passphrase2, 0, strlen(passphrase2));
928: xfree(passphrase2);
929: }
930:
931: if (identity_comment) {
932: strlcpy(comment, identity_comment, sizeof(comment));
933: } else {
1.18 markus 934: /* Create default commend field for the passphrase. */
1.12 markus 935: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
936: }
937:
938: /* Save the key with the given passphrase and comment. */
1.52 markus 939: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 940: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 941: memset(passphrase1, 0, strlen(passphrase1));
942: xfree(passphrase1);
943: exit(1);
944: }
945: /* Clear the passphrase. */
946: memset(passphrase1, 0, strlen(passphrase1));
947: xfree(passphrase1);
948:
949: /* Clear the private key and the random number generator. */
1.33 markus 950: key_free(private);
1.12 markus 951: arc4random_stir();
952:
953: if (!quiet)
954: printf("Your identification has been saved in %s.\n", identity_file);
955:
956: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 957: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
958: if (fd == -1) {
1.12 markus 959: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 960: exit(1);
961: }
962: f = fdopen(fd, "w");
963: if (f == NULL) {
964: printf("fdopen %s failed", identity_file);
1.12 markus 965: exit(1);
966: }
1.19 markus 967: if (!key_write(public, f))
968: fprintf(stderr, "write key failed");
969: fprintf(f, " %s\n", comment);
1.12 markus 970: fclose(f);
971:
972: if (!quiet) {
1.50 markus 973: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.19 markus 974: printf("Your public key has been saved in %s.\n",
975: identity_file);
1.12 markus 976: printf("The key fingerprint is:\n");
1.50 markus 977: printf("%s %s\n", fp, comment);
978: xfree(fp);
1.12 markus 979: }
1.19 markus 980:
981: key_free(public);
1.12 markus 982: exit(0);
1.1 deraadt 983: }
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