Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.90
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"
1.90 ! markus 15: RCSID("$OpenBSD: ssh-keygen.c,v 1.89 2001/12/29 21:56:01 stevesk 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 <sectok.h>
33: #include <openssl/engine.h>
34: #include "scard.h"
1.79 jakob 35: #endif
1.66 markus 36:
1.19 markus 37: /* Number of bits in the RSA/DSA key. This value can be changed on the command line. */
1.1 deraadt 38: int bits = 1024;
39:
1.14 markus 40: /*
41: * Flag indicating that we just want to change the passphrase. This can be
42: * set on the command line.
43: */
1.1 deraadt 44: int change_passphrase = 0;
45:
1.14 markus 46: /*
47: * Flag indicating that we just want to change the comment. This can be set
48: * on the command line.
49: */
1.1 deraadt 50: int change_comment = 0;
51:
1.2 provos 52: int quiet = 0;
53:
1.8 markus 54: /* Flag indicating that we just want to see the key fingerprint */
55: int print_fingerprint = 0;
1.49 markus 56: int print_bubblebabble = 0;
1.8 markus 57:
1.10 markus 58: /* The identity file name, given on the command line or entered by the user. */
59: char identity_file[1024];
60: int have_identity = 0;
1.1 deraadt 61:
62: /* This is set to the passphrase if given on the command line. */
63: char *identity_passphrase = NULL;
64:
65: /* This is set to the new passphrase if given on the command line. */
66: char *identity_new_passphrase = NULL;
67:
68: /* This is set to the new comment if given on the command line. */
69: char *identity_comment = NULL;
70:
1.19 markus 71: /* Dump public key file in format used by real and the original SSH 2 */
72: int convert_to_ssh2 = 0;
73: int convert_from_ssh2 = 0;
74: int print_public = 0;
1.33 markus 75:
1.87 djm 76: char *key_type_name = NULL;
1.19 markus 77:
1.10 markus 78: /* argv0 */
79: extern char *__progname;
1.1 deraadt 80:
1.19 markus 81: char hostname[MAXHOSTNAMELEN];
82:
1.63 itojun 83: static void
1.10 markus 84: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 85: {
1.12 markus 86: char buf[1024];
1.35 markus 87: char *name = NULL;
88:
89: switch (key_type_from_name(key_type_name)) {
90: case KEY_RSA1:
1.40 markus 91: name = _PATH_SSH_CLIENT_IDENTITY;
1.35 markus 92: break;
93: case KEY_DSA:
1.40 markus 94: name = _PATH_SSH_CLIENT_ID_DSA;
1.35 markus 95: break;
96: case KEY_RSA:
1.40 markus 97: name = _PATH_SSH_CLIENT_ID_RSA;
1.35 markus 98: break;
99: default:
100: fprintf(stderr, "bad key type");
101: exit(1);
102: break;
103: }
104: snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
1.37 markus 105: fprintf(stderr, "%s (%s): ", prompt, identity_file);
106: fflush(stderr);
1.12 markus 107: if (fgets(buf, sizeof(buf), stdin) == NULL)
108: exit(1);
109: if (strchr(buf, '\n'))
110: *strchr(buf, '\n') = 0;
111: if (strcmp(buf, "") != 0)
112: strlcpy(identity_file, buf, sizeof(identity_file));
113: have_identity = 1;
1.7 markus 114: }
115:
1.63 itojun 116: static Key *
1.61 markus 117: load_identity(char *filename)
1.19 markus 118: {
1.52 markus 119: char *pass;
120: Key *prv;
121:
1.55 markus 122: prv = key_load_private(filename, "", NULL);
1.52 markus 123: if (prv == NULL) {
1.61 markus 124: if (identity_passphrase)
125: pass = xstrdup(identity_passphrase);
126: else
1.65 markus 127: pass = read_passphrase("Enter passphrase: ",
128: RP_ALLOW_STDIN);
1.52 markus 129: prv = key_load_private(filename, pass, NULL);
1.19 markus 130: memset(pass, 0, strlen(pass));
131: xfree(pass);
132: }
1.52 markus 133: return prv;
1.19 markus 134: }
135:
1.32 markus 136: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
137: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
138: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 139: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 140:
1.63 itojun 141: static void
1.19 markus 142: do_convert_to_ssh2(struct passwd *pw)
143: {
1.59 markus 144: Key *k;
1.19 markus 145: int len;
1.36 markus 146: u_char *blob;
1.19 markus 147: struct stat st;
148:
149: if (!have_identity)
150: ask_filename(pw, "Enter file in which the key is");
151: if (stat(identity_file, &st) < 0) {
152: perror(identity_file);
153: exit(1);
154: }
1.59 markus 155: if ((k = key_load_public(identity_file, NULL)) == NULL) {
1.61 markus 156: if ((k = load_identity(identity_file)) == NULL) {
1.59 markus 157: fprintf(stderr, "load failed\n");
158: exit(1);
159: }
1.19 markus 160: }
1.81 markus 161: if (key_to_blob(k, &blob, &len) <= 0) {
162: fprintf(stderr, "key_to_blob failed\n");
163: exit(1);
164: }
1.32 markus 165: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.19 markus 166: fprintf(stdout,
1.32 markus 167: "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n",
1.59 markus 168: key_size(k), key_type(k),
1.19 markus 169: pw->pw_name, hostname);
170: dump_base64(stdout, blob, len);
1.32 markus 171: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.59 markus 172: key_free(k);
1.21 markus 173: xfree(blob);
1.19 markus 174: exit(0);
175: }
176:
1.63 itojun 177: static void
1.32 markus 178: buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
179: {
180: int bits = buffer_get_int(b);
181: int bytes = (bits + 7) / 8;
1.53 markus 182:
1.32 markus 183: if (buffer_len(b) < bytes)
1.53 markus 184: fatal("buffer_get_bignum_bits: input buffer too small: "
185: "need %d have %d", bytes, buffer_len(b));
1.89 stevesk 186: BN_bin2bn(buffer_ptr(b), bytes, value);
1.32 markus 187: buffer_consume(b, bytes);
188: }
189:
1.63 itojun 190: static Key *
1.80 stevesk 191: do_convert_private_ssh2_from_blob(u_char *blob, int blen)
1.32 markus 192: {
193: Buffer b;
194: Key *key = NULL;
1.64 markus 195: char *type, *cipher;
1.69 stevesk 196: u_char *sig, data[] = "abcde12345";
1.62 markus 197: int magic, rlen, ktype, i1, i2, i3, i4;
1.64 markus 198: u_int slen;
1.62 markus 199: u_long e;
1.32 markus 200:
201: buffer_init(&b);
202: buffer_append(&b, blob, blen);
203:
204: magic = buffer_get_int(&b);
205: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
206: error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC);
207: buffer_free(&b);
208: return NULL;
209: }
1.62 markus 210: i1 = buffer_get_int(&b);
1.32 markus 211: type = buffer_get_string(&b, NULL);
212: cipher = buffer_get_string(&b, NULL);
1.62 markus 213: i2 = buffer_get_int(&b);
214: i3 = buffer_get_int(&b);
215: i4 = buffer_get_int(&b);
216: debug("ignore (%d %d %d %d)", i1,i2,i3,i4);
1.32 markus 217: if (strcmp(cipher, "none") != 0) {
218: error("unsupported cipher %s", cipher);
219: xfree(cipher);
220: buffer_free(&b);
1.53 markus 221: xfree(type);
1.32 markus 222: return NULL;
223: }
224: xfree(cipher);
225:
1.53 markus 226: if (strstr(type, "dsa")) {
227: ktype = KEY_DSA;
228: } else if (strstr(type, "rsa")) {
229: ktype = KEY_RSA;
230: } else {
231: xfree(type);
1.32 markus 232: return NULL;
233: }
1.53 markus 234: key = key_new_private(ktype);
235: xfree(type);
236:
237: switch (key->type) {
238: case KEY_DSA:
239: buffer_get_bignum_bits(&b, key->dsa->p);
240: buffer_get_bignum_bits(&b, key->dsa->g);
241: buffer_get_bignum_bits(&b, key->dsa->q);
242: buffer_get_bignum_bits(&b, key->dsa->pub_key);
243: buffer_get_bignum_bits(&b, key->dsa->priv_key);
244: break;
245: case KEY_RSA:
1.62 markus 246: e = buffer_get_char(&b);
247: debug("e %lx", e);
248: if (e < 30) {
249: e <<= 8;
250: e += buffer_get_char(&b);
251: debug("e %lx", e);
252: e <<= 8;
253: e += buffer_get_char(&b);
254: debug("e %lx", e);
255: }
256: if (!BN_set_word(key->rsa->e, e)) {
1.53 markus 257: buffer_free(&b);
258: key_free(key);
259: return NULL;
260: }
261: buffer_get_bignum_bits(&b, key->rsa->d);
262: buffer_get_bignum_bits(&b, key->rsa->n);
263: buffer_get_bignum_bits(&b, key->rsa->iqmp);
264: buffer_get_bignum_bits(&b, key->rsa->q);
265: buffer_get_bignum_bits(&b, key->rsa->p);
1.68 markus 266: rsa_generate_additional_parameters(key->rsa);
1.53 markus 267: break;
268: }
1.32 markus 269: rlen = buffer_len(&b);
1.85 deraadt 270: if (rlen != 0)
1.53 markus 271: error("do_convert_private_ssh2_from_blob: "
272: "remaining bytes in key blob %d", rlen);
1.32 markus 273: buffer_free(&b);
1.64 markus 274:
275: /* try the key */
276: key_sign(key, &sig, &slen, data, sizeof(data));
277: key_verify(key, sig, slen, data, sizeof(data));
278: xfree(sig);
1.32 markus 279: return key;
280: }
281:
1.63 itojun 282: static void
1.19 markus 283: do_convert_from_ssh2(struct passwd *pw)
284: {
285: Key *k;
286: int blen;
287: char line[1024], *p;
1.80 stevesk 288: u_char blob[8096];
1.19 markus 289: char encoded[8096];
290: struct stat st;
1.32 markus 291: int escaped = 0, private = 0, ok;
1.19 markus 292: FILE *fp;
293:
294: if (!have_identity)
295: ask_filename(pw, "Enter file in which the key is");
296: if (stat(identity_file, &st) < 0) {
297: perror(identity_file);
298: exit(1);
299: }
300: fp = fopen(identity_file, "r");
301: if (fp == NULL) {
302: perror(identity_file);
303: exit(1);
304: }
305: encoded[0] = '\0';
306: while (fgets(line, sizeof(line), fp)) {
1.25 markus 307: if (!(p = strchr(line, '\n'))) {
308: fprintf(stderr, "input line too long.\n");
309: exit(1);
310: }
311: if (p > line && p[-1] == '\\')
312: escaped++;
1.19 markus 313: if (strncmp(line, "----", 4) == 0 ||
314: strstr(line, ": ") != NULL) {
1.32 markus 315: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
316: private = 1;
1.64 markus 317: if (strstr(line, " END ") != NULL) {
318: break;
319: }
1.60 markus 320: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 321: continue;
322: }
1.25 markus 323: if (escaped) {
324: escaped--;
1.60 markus 325: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 326: continue;
1.19 markus 327: }
328: *p = '\0';
329: strlcat(encoded, line, sizeof(encoded));
330: }
1.36 markus 331: blen = uudecode(encoded, (u_char *)blob, sizeof(blob));
1.19 markus 332: if (blen < 0) {
333: fprintf(stderr, "uudecode failed.\n");
334: exit(1);
335: }
1.32 markus 336: k = private ?
337: do_convert_private_ssh2_from_blob(blob, blen) :
1.33 markus 338: key_from_blob(blob, blen);
1.32 markus 339: if (k == NULL) {
340: fprintf(stderr, "decode blob failed.\n");
341: exit(1);
342: }
343: ok = private ?
1.53 markus 344: (k->type == KEY_DSA ?
345: PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
346: PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, NULL, 0, NULL, NULL)) :
1.32 markus 347: key_write(k, stdout);
348: if (!ok) {
349: fprintf(stderr, "key write failed");
350: exit(1);
351: }
1.19 markus 352: key_free(k);
1.90 ! markus 353: if (!private)
! 354: fprintf(stdout, "\n");
1.19 markus 355: fclose(fp);
356: exit(0);
357: }
358:
1.63 itojun 359: static void
1.19 markus 360: do_print_public(struct passwd *pw)
361: {
1.52 markus 362: Key *prv;
1.19 markus 363: struct stat st;
364:
365: if (!have_identity)
366: ask_filename(pw, "Enter file in which the key is");
367: if (stat(identity_file, &st) < 0) {
368: perror(identity_file);
369: exit(1);
370: }
1.61 markus 371: prv = load_identity(identity_file);
1.52 markus 372: if (prv == NULL) {
1.19 markus 373: fprintf(stderr, "load failed\n");
374: exit(1);
375: }
1.52 markus 376: if (!key_write(prv, stdout))
1.19 markus 377: fprintf(stderr, "key_write failed");
1.52 markus 378: key_free(prv);
1.19 markus 379: fprintf(stdout, "\n");
380: exit(0);
381: }
382:
1.74 markus 383: #ifdef SMARTCARD
1.66 markus 384: #define NUM_RSA_KEY_ELEMENTS 5+1
385: #define COPY_RSA_KEY(x, i) \
386: do { \
387: len = BN_num_bytes(prv->rsa->x); \
388: elements[i] = xmalloc(len); \
1.70 markus 389: debug("#bytes %d", len); \
1.66 markus 390: if (BN_bn2bin(prv->rsa->x, elements[i]) < 0) \
391: goto done; \
1.85 deraadt 392: } while (0)
1.66 markus 393:
1.74 markus 394: static int
395: get_AUT0(char *aut0)
396: {
397: EVP_MD *evp_md = EVP_sha1();
398: EVP_MD_CTX md;
399: char *pass;
400:
401: pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
402: if (pass == NULL)
403: return -1;
404: EVP_DigestInit(&md, evp_md);
405: EVP_DigestUpdate(&md, pass, strlen(pass));
406: EVP_DigestFinal(&md, aut0, NULL);
407: memset(pass, 0, strlen(pass));
408: xfree(pass);
409: return 0;
410: }
411:
1.66 markus 412: static void
1.75 markus 413: do_upload(struct passwd *pw, const char *sc_reader_id)
1.66 markus 414: {
415: Key *prv = NULL;
416: struct stat st;
417: u_char *elements[NUM_RSA_KEY_ELEMENTS];
418: u_char key_fid[2];
1.74 markus 419: u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
420: u_char AUT0[EVP_MAX_MD_SIZE];
1.66 markus 421: int len, status = 1, i, fd = -1, ret;
1.72 markus 422: int sw = 0, cla = 0x00;
1.66 markus 423:
1.71 markus 424: for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
425: elements[i] = NULL;
1.66 markus 426: if (!have_identity)
427: ask_filename(pw, "Enter file in which the key is");
428: if (stat(identity_file, &st) < 0) {
429: perror(identity_file);
430: goto done;
431: }
432: prv = load_identity(identity_file);
433: if (prv == NULL) {
434: error("load failed");
435: goto done;
436: }
437: COPY_RSA_KEY(q, 0);
438: COPY_RSA_KEY(p, 1);
439: COPY_RSA_KEY(iqmp, 2);
440: COPY_RSA_KEY(dmq1, 3);
441: COPY_RSA_KEY(dmp1, 4);
442: COPY_RSA_KEY(n, 5);
443: len = BN_num_bytes(prv->rsa->n);
1.75 markus 444: fd = sectok_friendly_open(sc_reader_id, STONOWAIT, &sw);
1.72 markus 445: if (fd < 0) {
1.75 markus 446: error("sectok_open failed: %s", sectok_get_sw(sw));
447: goto done;
448: }
449: if (! sectok_cardpresent(fd)) {
450: error("smartcard in reader %s not present",
451: sc_reader_id);
1.66 markus 452: goto done;
1.72 markus 453: }
1.73 rees 454: ret = sectok_reset(fd, 0, NULL, &sw);
1.72 markus 455: if (ret <= 0) {
1.75 markus 456: error("sectok_reset failed: %s", sectok_get_sw(sw));
1.66 markus 457: goto done;
1.72 markus 458: }
1.67 markus 459: if ((cla = cyberflex_inq_class(fd)) < 0) {
460: error("cyberflex_inq_class failed");
461: goto done;
462: }
1.74 markus 463: memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
464: if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
465: if (get_AUT0(AUT0) < 0 ||
466: cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
467: error("cyberflex_verify_AUT0 failed");
468: goto done;
469: }
1.66 markus 470: }
471: key_fid[0] = 0x00;
472: key_fid[1] = 0x12;
1.70 markus 473: if (cyberflex_load_rsa_priv(fd, cla, key_fid, 5, 8*len, elements,
1.72 markus 474: &sw) < 0) {
475: error("cyberflex_load_rsa_priv failed: %s", sectok_get_sw(sw));
1.70 markus 476: goto done;
477: }
1.72 markus 478: if (!sectok_swOK(sw))
1.66 markus 479: goto done;
480: log("cyberflex_load_rsa_priv done");
481: key_fid[0] = 0x73;
482: key_fid[1] = 0x68;
1.70 markus 483: if (cyberflex_load_rsa_pub(fd, cla, key_fid, len, elements[5],
1.72 markus 484: &sw) < 0) {
485: error("cyberflex_load_rsa_pub failed: %s", sectok_get_sw(sw));
1.70 markus 486: goto done;
487: }
1.72 markus 488: if (!sectok_swOK(sw))
1.66 markus 489: goto done;
490: log("cyberflex_load_rsa_pub done");
491: status = 0;
492: log("loading key done");
493: done:
1.82 djm 494:
495: memset(elements[0], '\0', BN_num_bytes(prv->rsa->q));
496: memset(elements[1], '\0', BN_num_bytes(prv->rsa->p));
497: memset(elements[2], '\0', BN_num_bytes(prv->rsa->iqmp));
498: memset(elements[3], '\0', BN_num_bytes(prv->rsa->dmq1));
499: memset(elements[4], '\0', BN_num_bytes(prv->rsa->dmp1));
500: memset(elements[5], '\0', BN_num_bytes(prv->rsa->n));
501:
1.66 markus 502: if (prv)
503: key_free(prv);
504: for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
1.72 markus 505: if (elements[i])
506: xfree(elements[i]);
1.66 markus 507: if (fd != -1)
1.72 markus 508: sectok_close(fd);
1.66 markus 509: exit(status);
1.74 markus 510: }
1.75 markus 511:
512: static void
513: do_download(struct passwd *pw, const char *sc_reader_id)
514: {
515: Key *pub = NULL;
516:
517: pub = sc_get_key(sc_reader_id);
518: if (pub == NULL)
519: fatal("cannot read public key from smartcard");
520: key_write(pub, stdout);
521: key_free(pub);
522: fprintf(stdout, "\n");
523: exit(0);
524: }
1.78 jakob 525: #endif /* SMARTCARD */
1.66 markus 526:
1.63 itojun 527: static void
1.8 markus 528: do_fingerprint(struct passwd *pw)
529: {
1.15 markus 530: FILE *f;
1.19 markus 531: Key *public;
1.49 markus 532: char *comment = NULL, *cp, *ep, line[16*1024], *fp;
1.84 stevesk 533: int i, skip = 0, num = 1, invalid = 1;
534: enum fp_rep rep;
535: enum fp_type fptype;
1.12 markus 536: struct stat st;
537:
1.52 markus 538: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
539: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 540:
1.12 markus 541: if (!have_identity)
542: ask_filename(pw, "Enter file in which the key is");
543: if (stat(identity_file, &st) < 0) {
544: perror(identity_file);
545: exit(1);
546: }
1.52 markus 547: public = key_load_public(identity_file, &comment);
548: if (public != NULL) {
549: fp = key_fingerprint(public, fptype, rep);
550: printf("%d %s %s\n", key_size(public), fp, comment);
1.33 markus 551: key_free(public);
552: xfree(comment);
1.49 markus 553: xfree(fp);
1.15 markus 554: exit(0);
555: }
1.52 markus 556: if (comment)
557: xfree(comment);
1.15 markus 558:
559: f = fopen(identity_file, "r");
560: if (f != NULL) {
561: while (fgets(line, sizeof(line), f)) {
562: i = strlen(line) - 1;
563: if (line[i] != '\n') {
564: error("line %d too long: %.40s...", num, line);
565: skip = 1;
566: continue;
567: }
568: num++;
569: if (skip) {
570: skip = 0;
571: continue;
572: }
573: line[i] = '\0';
574:
575: /* Skip leading whitespace, empty and comment lines. */
576: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
577: ;
578: if (!*cp || *cp == '\n' || *cp == '#')
579: continue ;
580: i = strtol(cp, &ep, 10);
581: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
582: int quoted = 0;
583: comment = cp;
584: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
585: if (*cp == '\\' && cp[1] == '"')
586: cp++; /* Skip both */
587: else if (*cp == '"')
588: quoted = !quoted;
589: }
590: if (!*cp)
591: continue;
592: *cp++ = '\0';
593: }
594: ep = cp;
1.38 markus 595: public = key_new(KEY_RSA1);
596: if (key_read(public, &cp) != 1) {
597: cp = ep;
598: key_free(public);
599: public = key_new(KEY_UNSPEC);
600: if (key_read(public, &cp) != 1) {
601: key_free(public);
602: continue;
603: }
1.12 markus 604: }
1.38 markus 605: comment = *cp ? cp : comment;
1.52 markus 606: fp = key_fingerprint(public, fptype, rep);
1.49 markus 607: printf("%d %s %s\n", key_size(public), fp,
1.38 markus 608: comment ? comment : "no comment");
1.49 markus 609: xfree(fp);
1.52 markus 610: key_free(public);
1.38 markus 611: invalid = 0;
1.12 markus 612: }
1.15 markus 613: fclose(f);
614: }
615: if (invalid) {
1.83 markus 616: printf("%s is not a public key file.\n", identity_file);
1.15 markus 617: exit(1);
1.12 markus 618: }
619: exit(0);
1.8 markus 620: }
621:
1.13 deraadt 622: /*
623: * Perform changing a passphrase. The argument is the passwd structure
624: * for the current user.
625: */
1.63 itojun 626: static void
1.7 markus 627: do_change_passphrase(struct passwd *pw)
628: {
1.12 markus 629: char *comment;
630: char *old_passphrase, *passphrase1, *passphrase2;
631: struct stat st;
1.19 markus 632: Key *private;
1.12 markus 633:
634: if (!have_identity)
635: ask_filename(pw, "Enter file in which the key is");
636: if (stat(identity_file, &st) < 0) {
637: perror(identity_file);
638: exit(1);
639: }
640: /* Try to load the file with empty passphrase. */
1.52 markus 641: private = key_load_private(identity_file, "", &comment);
642: if (private == NULL) {
1.12 markus 643: if (identity_passphrase)
644: old_passphrase = xstrdup(identity_passphrase);
645: else
1.65 markus 646: old_passphrase =
647: read_passphrase("Enter old passphrase: ",
648: RP_ALLOW_STDIN);
649: private = key_load_private(identity_file, old_passphrase,
650: &comment);
1.52 markus 651: memset(old_passphrase, 0, strlen(old_passphrase));
652: xfree(old_passphrase);
653: if (private == NULL) {
1.12 markus 654: printf("Bad passphrase.\n");
655: exit(1);
656: }
657: }
658: printf("Key has comment '%s'\n", comment);
659:
660: /* Ask the new passphrase (twice). */
661: if (identity_new_passphrase) {
662: passphrase1 = xstrdup(identity_new_passphrase);
663: passphrase2 = NULL;
664: } else {
665: passphrase1 =
1.65 markus 666: read_passphrase("Enter new passphrase (empty for no "
667: "passphrase): ", RP_ALLOW_STDIN);
668: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 669: RP_ALLOW_STDIN);
1.12 markus 670:
671: /* Verify that they are the same. */
672: if (strcmp(passphrase1, passphrase2) != 0) {
673: memset(passphrase1, 0, strlen(passphrase1));
674: memset(passphrase2, 0, strlen(passphrase2));
675: xfree(passphrase1);
676: xfree(passphrase2);
677: printf("Pass phrases do not match. Try again.\n");
678: exit(1);
679: }
680: /* Destroy the other copy. */
681: memset(passphrase2, 0, strlen(passphrase2));
682: xfree(passphrase2);
683: }
684:
685: /* Save the file using the new passphrase. */
1.52 markus 686: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 687: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 688: memset(passphrase1, 0, strlen(passphrase1));
689: xfree(passphrase1);
1.19 markus 690: key_free(private);
1.12 markus 691: xfree(comment);
692: exit(1);
693: }
694: /* Destroy the passphrase and the copy of the key in memory. */
695: memset(passphrase1, 0, strlen(passphrase1));
696: xfree(passphrase1);
1.19 markus 697: key_free(private); /* Destroys contents */
1.12 markus 698: xfree(comment);
1.1 deraadt 699:
1.12 markus 700: printf("Your identification has been saved with the new passphrase.\n");
701: exit(0);
1.1 deraadt 702: }
703:
1.13 deraadt 704: /*
705: * Change the comment of a private key file.
706: */
1.63 itojun 707: static void
1.2 provos 708: do_change_comment(struct passwd *pw)
1.1 deraadt 709: {
1.46 deraadt 710: char new_comment[1024], *comment, *passphrase;
1.52 markus 711: Key *private;
712: Key *public;
1.12 markus 713: struct stat st;
714: FILE *f;
1.46 deraadt 715: int fd;
1.12 markus 716:
717: if (!have_identity)
718: ask_filename(pw, "Enter file in which the key is");
719: if (stat(identity_file, &st) < 0) {
720: perror(identity_file);
721: exit(1);
722: }
1.52 markus 723: private = key_load_private(identity_file, "", &comment);
724: if (private == NULL) {
1.12 markus 725: if (identity_passphrase)
726: passphrase = xstrdup(identity_passphrase);
727: else if (identity_new_passphrase)
728: passphrase = xstrdup(identity_new_passphrase);
729: else
1.65 markus 730: passphrase = read_passphrase("Enter passphrase: ",
731: RP_ALLOW_STDIN);
1.12 markus 732: /* Try to load using the passphrase. */
1.52 markus 733: private = key_load_private(identity_file, passphrase, &comment);
734: if (private == NULL) {
1.12 markus 735: memset(passphrase, 0, strlen(passphrase));
736: xfree(passphrase);
737: printf("Bad passphrase.\n");
738: exit(1);
739: }
1.52 markus 740: } else {
741: passphrase = xstrdup("");
1.12 markus 742: }
1.52 markus 743: if (private->type != KEY_RSA1) {
744: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
745: key_free(private);
746: exit(1);
1.86 deraadt 747: }
1.12 markus 748: printf("Key now has comment '%s'\n", comment);
749:
750: if (identity_comment) {
751: strlcpy(new_comment, identity_comment, sizeof(new_comment));
752: } else {
753: printf("Enter new comment: ");
754: fflush(stdout);
755: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
756: memset(passphrase, 0, strlen(passphrase));
1.19 markus 757: key_free(private);
1.12 markus 758: exit(1);
759: }
760: if (strchr(new_comment, '\n'))
761: *strchr(new_comment, '\n') = 0;
762: }
763:
764: /* Save the file using the new passphrase. */
1.52 markus 765: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 766: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 767: memset(passphrase, 0, strlen(passphrase));
768: xfree(passphrase);
1.19 markus 769: key_free(private);
1.12 markus 770: xfree(comment);
771: exit(1);
772: }
773: memset(passphrase, 0, strlen(passphrase));
774: xfree(passphrase);
1.52 markus 775: public = key_from_private(private);
1.19 markus 776: key_free(private);
1.12 markus 777:
778: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 779: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
780: if (fd == -1) {
1.12 markus 781: printf("Could not save your public key in %s\n", identity_file);
782: exit(1);
783: }
1.46 deraadt 784: f = fdopen(fd, "w");
785: if (f == NULL) {
786: printf("fdopen %s failed", identity_file);
787: exit(1);
788: }
1.19 markus 789: if (!key_write(public, f))
790: fprintf(stderr, "write key failed");
791: key_free(public);
792: fprintf(f, " %s\n", new_comment);
1.12 markus 793: fclose(f);
1.1 deraadt 794:
1.12 markus 795: xfree(comment);
1.1 deraadt 796:
1.12 markus 797: printf("The comment in your key file has been changed.\n");
798: exit(0);
1.1 deraadt 799: }
800:
1.63 itojun 801: static void
1.10 markus 802: usage(void)
803: {
1.77 jakob 804: fprintf(stderr, "Usage: %s [options]\n", __progname);
805: fprintf(stderr, "Options:\n");
806: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
807: fprintf(stderr, " -c Change comment in private and public key files.\n");
808: fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
809: fprintf(stderr, " -f filename Filename of the key file.\n");
810: fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
811: fprintf(stderr, " -l Show fingerprint of key file.\n");
812: fprintf(stderr, " -p Change passphrase of private key file.\n");
813: fprintf(stderr, " -q Quiet.\n");
814: fprintf(stderr, " -y Read private key file and print public key.\n");
815: fprintf(stderr, " -t type Specify type of key to create.\n");
816: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
817: fprintf(stderr, " -C comment Provide new comment.\n");
818: fprintf(stderr, " -N phrase Provide new passphrase.\n");
819: fprintf(stderr, " -P phrase Provide old passphrase.\n");
820: #ifdef SMARTCARD
821: fprintf(stderr, " -D reader Download public key from smartcard.\n");
822: fprintf(stderr, " -U reader Upload private key to smartcard.\n");
823: #endif /* SMARTCARD */
824:
1.12 markus 825: exit(1);
1.10 markus 826: }
827:
1.13 deraadt 828: /*
829: * Main program for key management.
830: */
1.2 provos 831: int
832: main(int ac, char **av)
1.1 deraadt 833: {
1.87 djm 834: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.75 markus 835: char *reader_id = NULL;
1.46 deraadt 836: Key *private, *public;
1.12 markus 837: struct passwd *pw;
838: struct stat st;
1.75 markus 839: int opt, type, fd, download = 0;
1.12 markus 840: FILE *f;
1.33 markus 841:
1.12 markus 842: extern int optind;
843: extern char *optarg;
844:
1.26 markus 845: SSLeay_add_all_algorithms();
1.19 markus 846:
1.14 markus 847: /* we need this for the home * directory. */
1.12 markus 848: pw = getpwuid(getuid());
849: if (!pw) {
850: printf("You don't exist, go away!\n");
851: exit(1);
852: }
1.19 markus 853: if (gethostname(hostname, sizeof(hostname)) < 0) {
854: perror("gethostname");
855: exit(1);
856: }
1.14 markus 857:
1.76 jakob 858: while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) {
1.12 markus 859: switch (opt) {
860: case 'b':
861: bits = atoi(optarg);
862: if (bits < 512 || bits > 32768) {
863: printf("Bits has bad value.\n");
864: exit(1);
865: }
866: break;
867: case 'l':
868: print_fingerprint = 1;
869: break;
1.49 markus 870: case 'B':
871: print_bubblebabble = 1;
872: break;
1.12 markus 873: case 'p':
874: change_passphrase = 1;
875: break;
876: case 'c':
877: change_comment = 1;
878: break;
879: case 'f':
880: strlcpy(identity_file, optarg, sizeof(identity_file));
881: have_identity = 1;
882: break;
883: case 'P':
884: identity_passphrase = optarg;
885: break;
886: case 'N':
887: identity_new_passphrase = optarg;
888: break;
889: case 'C':
890: identity_comment = optarg;
891: break;
892: case 'q':
893: quiet = 1;
1.20 deraadt 894: break;
895: case 'R':
1.33 markus 896: /* unused */
897: exit(0);
1.12 markus 898: break;
1.57 markus 899: case 'e':
1.19 markus 900: case 'x':
1.57 markus 901: /* export key */
1.19 markus 902: convert_to_ssh2 = 1;
903: break;
1.57 markus 904: case 'i':
1.19 markus 905: case 'X':
1.57 markus 906: /* import key */
1.19 markus 907: convert_from_ssh2 = 1;
908: break;
909: case 'y':
910: print_public = 1;
1.47 jakob 911: break;
1.19 markus 912: case 'd':
1.33 markus 913: key_type_name = "dsa";
1.19 markus 914: break;
1.33 markus 915: case 't':
916: key_type_name = optarg;
917: break;
1.75 markus 918: case 'D':
919: download = 1;
1.76 jakob 920: case 'U':
1.75 markus 921: reader_id = optarg;
1.66 markus 922: break;
1.12 markus 923: case '?':
924: default:
925: usage();
926: }
927: }
928: if (optind < ac) {
929: printf("Too many arguments.\n");
1.87 djm 930: usage();
931: }
1.12 markus 932: if (change_passphrase && change_comment) {
933: printf("Can only have one of -p and -c.\n");
934: usage();
935: }
1.49 markus 936: if (print_fingerprint || print_bubblebabble)
1.12 markus 937: do_fingerprint(pw);
938: if (change_passphrase)
939: do_change_passphrase(pw);
940: if (change_comment)
941: do_change_comment(pw);
1.19 markus 942: if (convert_to_ssh2)
943: do_convert_to_ssh2(pw);
944: if (convert_from_ssh2)
945: do_convert_from_ssh2(pw);
946: if (print_public)
947: do_print_public(pw);
1.75 markus 948: if (reader_id != NULL) {
1.74 markus 949: #ifdef SMARTCARD
1.75 markus 950: if (download)
951: do_download(pw, reader_id);
952: else
953: do_upload(pw, reader_id);
1.78 jakob 954: #else /* SMARTCARD */
1.74 markus 955: fatal("no support for smartcards.");
1.78 jakob 956: #endif /* SMARTCARD */
1.75 markus 957: }
1.12 markus 958:
959: arc4random_stir();
960:
1.88 markus 961: if (key_type_name == NULL) {
962: printf("You must specify a key type (-t).\n");
963: usage();
964: }
1.35 markus 965: type = key_type_from_name(key_type_name);
966: if (type == KEY_UNSPEC) {
967: fprintf(stderr, "unknown key type %s\n", key_type_name);
968: exit(1);
1.19 markus 969: }
1.33 markus 970: if (!quiet)
1.35 markus 971: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 972: private = key_generate(type, bits);
973: if (private == NULL) {
974: fprintf(stderr, "key_generate failed");
975: exit(1);
976: }
977: public = key_from_private(private);
1.12 markus 978:
979: if (!have_identity)
980: ask_filename(pw, "Enter file in which to save the key");
981:
982: /* Create ~/.ssh directory if it doesn\'t already exist. */
1.40 markus 983: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1.12 markus 984: if (strstr(identity_file, dotsshdir) != NULL &&
985: stat(dotsshdir, &st) < 0) {
1.29 djm 986: if (mkdir(dotsshdir, 0700) < 0)
1.12 markus 987: error("Could not create directory '%s'.", dotsshdir);
988: else if (!quiet)
989: printf("Created directory '%s'.\n", dotsshdir);
990: }
991: /* If the file already exists, ask the user to confirm. */
992: if (stat(identity_file, &st) >= 0) {
993: char yesno[3];
994: printf("%s already exists.\n", identity_file);
995: printf("Overwrite (y/n)? ");
996: fflush(stdout);
997: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
998: exit(1);
999: if (yesno[0] != 'y' && yesno[0] != 'Y')
1000: exit(1);
1001: }
1002: /* Ask for a passphrase (twice). */
1003: if (identity_passphrase)
1004: passphrase1 = xstrdup(identity_passphrase);
1005: else if (identity_new_passphrase)
1006: passphrase1 = xstrdup(identity_new_passphrase);
1007: else {
1008: passphrase_again:
1009: passphrase1 =
1.65 markus 1010: read_passphrase("Enter passphrase (empty for no "
1011: "passphrase): ", RP_ALLOW_STDIN);
1012: passphrase2 = read_passphrase("Enter same passphrase again: ",
1013: RP_ALLOW_STDIN);
1.12 markus 1014: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 1015: /*
1016: * The passphrases do not match. Clear them and
1017: * retry.
1018: */
1.12 markus 1019: memset(passphrase1, 0, strlen(passphrase1));
1020: memset(passphrase2, 0, strlen(passphrase2));
1021: xfree(passphrase1);
1022: xfree(passphrase2);
1023: printf("Passphrases do not match. Try again.\n");
1024: goto passphrase_again;
1025: }
1026: /* Clear the other copy of the passphrase. */
1027: memset(passphrase2, 0, strlen(passphrase2));
1028: xfree(passphrase2);
1029: }
1030:
1031: if (identity_comment) {
1032: strlcpy(comment, identity_comment, sizeof(comment));
1033: } else {
1.18 markus 1034: /* Create default commend field for the passphrase. */
1.12 markus 1035: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1036: }
1037:
1038: /* Save the key with the given passphrase and comment. */
1.52 markus 1039: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 1040: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1041: memset(passphrase1, 0, strlen(passphrase1));
1042: xfree(passphrase1);
1043: exit(1);
1044: }
1045: /* Clear the passphrase. */
1046: memset(passphrase1, 0, strlen(passphrase1));
1047: xfree(passphrase1);
1048:
1049: /* Clear the private key and the random number generator. */
1.33 markus 1050: key_free(private);
1.12 markus 1051: arc4random_stir();
1052:
1053: if (!quiet)
1054: printf("Your identification has been saved in %s.\n", identity_file);
1055:
1056: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1057: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1058: if (fd == -1) {
1.12 markus 1059: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 1060: exit(1);
1061: }
1062: f = fdopen(fd, "w");
1063: if (f == NULL) {
1064: printf("fdopen %s failed", identity_file);
1.12 markus 1065: exit(1);
1066: }
1.19 markus 1067: if (!key_write(public, f))
1068: fprintf(stderr, "write key failed");
1069: fprintf(f, " %s\n", comment);
1.12 markus 1070: fclose(f);
1071:
1072: if (!quiet) {
1.50 markus 1073: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.19 markus 1074: printf("Your public key has been saved in %s.\n",
1075: identity_file);
1.12 markus 1076: printf("The key fingerprint is:\n");
1.50 markus 1077: printf("%s %s\n", fp, comment);
1078: xfree(fp);
1.12 markus 1079: }
1.19 markus 1080:
1081: key_free(public);
1.12 markus 1082: exit(0);
1.1 deraadt 1083: }
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