Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.87
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"
1.87 ! djm 15: RCSID("$OpenBSD: ssh-keygen.c,v 1.86 2001/12/19 07:18:56 deraadt 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));
1.36 markus 186: BN_bin2bn((u_char *)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);
353: fprintf(stdout, "\n");
354: fclose(fp);
355: exit(0);
356: }
357:
1.63 itojun 358: static void
1.19 markus 359: do_print_public(struct passwd *pw)
360: {
1.52 markus 361: Key *prv;
1.19 markus 362: struct stat st;
363:
364: if (!have_identity)
365: ask_filename(pw, "Enter file in which the key is");
366: if (stat(identity_file, &st) < 0) {
367: perror(identity_file);
368: exit(1);
369: }
1.61 markus 370: prv = load_identity(identity_file);
1.52 markus 371: if (prv == NULL) {
1.19 markus 372: fprintf(stderr, "load failed\n");
373: exit(1);
374: }
1.52 markus 375: if (!key_write(prv, stdout))
1.19 markus 376: fprintf(stderr, "key_write failed");
1.52 markus 377: key_free(prv);
1.19 markus 378: fprintf(stdout, "\n");
379: exit(0);
380: }
381:
1.74 markus 382: #ifdef SMARTCARD
1.66 markus 383: #define NUM_RSA_KEY_ELEMENTS 5+1
384: #define COPY_RSA_KEY(x, i) \
385: do { \
386: len = BN_num_bytes(prv->rsa->x); \
387: elements[i] = xmalloc(len); \
1.70 markus 388: debug("#bytes %d", len); \
1.66 markus 389: if (BN_bn2bin(prv->rsa->x, elements[i]) < 0) \
390: goto done; \
1.85 deraadt 391: } while (0)
1.66 markus 392:
1.74 markus 393: static int
394: get_AUT0(char *aut0)
395: {
396: EVP_MD *evp_md = EVP_sha1();
397: EVP_MD_CTX md;
398: char *pass;
399:
400: pass = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
401: if (pass == NULL)
402: return -1;
403: EVP_DigestInit(&md, evp_md);
404: EVP_DigestUpdate(&md, pass, strlen(pass));
405: EVP_DigestFinal(&md, aut0, NULL);
406: memset(pass, 0, strlen(pass));
407: xfree(pass);
408: return 0;
409: }
410:
1.66 markus 411: static void
1.75 markus 412: do_upload(struct passwd *pw, const char *sc_reader_id)
1.66 markus 413: {
414: Key *prv = NULL;
415: struct stat st;
416: u_char *elements[NUM_RSA_KEY_ELEMENTS];
417: u_char key_fid[2];
1.74 markus 418: u_char DEFAUT0[] = {0xad, 0x9f, 0x61, 0xfe, 0xfa, 0x20, 0xce, 0x63};
419: u_char AUT0[EVP_MAX_MD_SIZE];
1.66 markus 420: int len, status = 1, i, fd = -1, ret;
1.72 markus 421: int sw = 0, cla = 0x00;
1.66 markus 422:
1.71 markus 423: for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
424: elements[i] = NULL;
1.66 markus 425: if (!have_identity)
426: ask_filename(pw, "Enter file in which the key is");
427: if (stat(identity_file, &st) < 0) {
428: perror(identity_file);
429: goto done;
430: }
431: prv = load_identity(identity_file);
432: if (prv == NULL) {
433: error("load failed");
434: goto done;
435: }
436: COPY_RSA_KEY(q, 0);
437: COPY_RSA_KEY(p, 1);
438: COPY_RSA_KEY(iqmp, 2);
439: COPY_RSA_KEY(dmq1, 3);
440: COPY_RSA_KEY(dmp1, 4);
441: COPY_RSA_KEY(n, 5);
442: len = BN_num_bytes(prv->rsa->n);
1.75 markus 443: fd = sectok_friendly_open(sc_reader_id, STONOWAIT, &sw);
1.72 markus 444: if (fd < 0) {
1.75 markus 445: error("sectok_open failed: %s", sectok_get_sw(sw));
446: goto done;
447: }
448: if (! sectok_cardpresent(fd)) {
449: error("smartcard in reader %s not present",
450: sc_reader_id);
1.66 markus 451: goto done;
1.72 markus 452: }
1.73 rees 453: ret = sectok_reset(fd, 0, NULL, &sw);
1.72 markus 454: if (ret <= 0) {
1.75 markus 455: error("sectok_reset failed: %s", sectok_get_sw(sw));
1.66 markus 456: goto done;
1.72 markus 457: }
1.67 markus 458: if ((cla = cyberflex_inq_class(fd)) < 0) {
459: error("cyberflex_inq_class failed");
460: goto done;
461: }
1.74 markus 462: memcpy(AUT0, DEFAUT0, sizeof(DEFAUT0));
463: if (cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
464: if (get_AUT0(AUT0) < 0 ||
465: cyberflex_verify_AUT0(fd, cla, AUT0, sizeof(DEFAUT0)) < 0) {
466: error("cyberflex_verify_AUT0 failed");
467: goto done;
468: }
1.66 markus 469: }
470: key_fid[0] = 0x00;
471: key_fid[1] = 0x12;
1.70 markus 472: if (cyberflex_load_rsa_priv(fd, cla, key_fid, 5, 8*len, elements,
1.72 markus 473: &sw) < 0) {
474: error("cyberflex_load_rsa_priv failed: %s", sectok_get_sw(sw));
1.70 markus 475: goto done;
476: }
1.72 markus 477: if (!sectok_swOK(sw))
1.66 markus 478: goto done;
479: log("cyberflex_load_rsa_priv done");
480: key_fid[0] = 0x73;
481: key_fid[1] = 0x68;
1.70 markus 482: if (cyberflex_load_rsa_pub(fd, cla, key_fid, len, elements[5],
1.72 markus 483: &sw) < 0) {
484: error("cyberflex_load_rsa_pub failed: %s", sectok_get_sw(sw));
1.70 markus 485: goto done;
486: }
1.72 markus 487: if (!sectok_swOK(sw))
1.66 markus 488: goto done;
489: log("cyberflex_load_rsa_pub done");
490: status = 0;
491: log("loading key done");
492: done:
1.82 djm 493:
494: memset(elements[0], '\0', BN_num_bytes(prv->rsa->q));
495: memset(elements[1], '\0', BN_num_bytes(prv->rsa->p));
496: memset(elements[2], '\0', BN_num_bytes(prv->rsa->iqmp));
497: memset(elements[3], '\0', BN_num_bytes(prv->rsa->dmq1));
498: memset(elements[4], '\0', BN_num_bytes(prv->rsa->dmp1));
499: memset(elements[5], '\0', BN_num_bytes(prv->rsa->n));
500:
1.66 markus 501: if (prv)
502: key_free(prv);
503: for (i = 0; i < NUM_RSA_KEY_ELEMENTS; i++)
1.72 markus 504: if (elements[i])
505: xfree(elements[i]);
1.66 markus 506: if (fd != -1)
1.72 markus 507: sectok_close(fd);
1.66 markus 508: exit(status);
1.74 markus 509: }
1.75 markus 510:
511: static void
512: do_download(struct passwd *pw, const char *sc_reader_id)
513: {
514: Key *pub = NULL;
515:
516: pub = sc_get_key(sc_reader_id);
517: if (pub == NULL)
518: fatal("cannot read public key from smartcard");
519: key_write(pub, stdout);
520: key_free(pub);
521: fprintf(stdout, "\n");
522: exit(0);
523: }
1.78 jakob 524: #endif /* SMARTCARD */
1.66 markus 525:
1.63 itojun 526: static void
1.8 markus 527: do_fingerprint(struct passwd *pw)
528: {
1.15 markus 529: FILE *f;
1.19 markus 530: Key *public;
1.49 markus 531: char *comment = NULL, *cp, *ep, line[16*1024], *fp;
1.84 stevesk 532: int i, skip = 0, num = 1, invalid = 1;
533: enum fp_rep rep;
534: enum fp_type fptype;
1.12 markus 535: struct stat st;
536:
1.52 markus 537: fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5;
538: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX;
1.49 markus 539:
1.12 markus 540: if (!have_identity)
541: ask_filename(pw, "Enter file in which the key is");
542: if (stat(identity_file, &st) < 0) {
543: perror(identity_file);
544: exit(1);
545: }
1.52 markus 546: public = key_load_public(identity_file, &comment);
547: if (public != NULL) {
548: fp = key_fingerprint(public, fptype, rep);
549: printf("%d %s %s\n", key_size(public), fp, comment);
1.33 markus 550: key_free(public);
551: xfree(comment);
1.49 markus 552: xfree(fp);
1.15 markus 553: exit(0);
554: }
1.52 markus 555: if (comment)
556: xfree(comment);
1.15 markus 557:
558: f = fopen(identity_file, "r");
559: if (f != NULL) {
560: while (fgets(line, sizeof(line), f)) {
561: i = strlen(line) - 1;
562: if (line[i] != '\n') {
563: error("line %d too long: %.40s...", num, line);
564: skip = 1;
565: continue;
566: }
567: num++;
568: if (skip) {
569: skip = 0;
570: continue;
571: }
572: line[i] = '\0';
573:
574: /* Skip leading whitespace, empty and comment lines. */
575: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
576: ;
577: if (!*cp || *cp == '\n' || *cp == '#')
578: continue ;
579: i = strtol(cp, &ep, 10);
580: if (i == 0 || ep == NULL || (*ep != ' ' && *ep != '\t')) {
581: int quoted = 0;
582: comment = cp;
583: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
584: if (*cp == '\\' && cp[1] == '"')
585: cp++; /* Skip both */
586: else if (*cp == '"')
587: quoted = !quoted;
588: }
589: if (!*cp)
590: continue;
591: *cp++ = '\0';
592: }
593: ep = cp;
1.38 markus 594: public = key_new(KEY_RSA1);
595: if (key_read(public, &cp) != 1) {
596: cp = ep;
597: key_free(public);
598: public = key_new(KEY_UNSPEC);
599: if (key_read(public, &cp) != 1) {
600: key_free(public);
601: continue;
602: }
1.12 markus 603: }
1.38 markus 604: comment = *cp ? cp : comment;
1.52 markus 605: fp = key_fingerprint(public, fptype, rep);
1.49 markus 606: printf("%d %s %s\n", key_size(public), fp,
1.38 markus 607: comment ? comment : "no comment");
1.49 markus 608: xfree(fp);
1.52 markus 609: key_free(public);
1.38 markus 610: invalid = 0;
1.12 markus 611: }
1.15 markus 612: fclose(f);
613: }
614: if (invalid) {
1.83 markus 615: printf("%s is not a public key file.\n", identity_file);
1.15 markus 616: exit(1);
1.12 markus 617: }
618: exit(0);
1.8 markus 619: }
620:
1.13 deraadt 621: /*
622: * Perform changing a passphrase. The argument is the passwd structure
623: * for the current user.
624: */
1.63 itojun 625: static void
1.7 markus 626: do_change_passphrase(struct passwd *pw)
627: {
1.12 markus 628: char *comment;
629: char *old_passphrase, *passphrase1, *passphrase2;
630: struct stat st;
1.19 markus 631: Key *private;
1.12 markus 632:
633: if (!have_identity)
634: ask_filename(pw, "Enter file in which the key is");
635: if (stat(identity_file, &st) < 0) {
636: perror(identity_file);
637: exit(1);
638: }
639: /* Try to load the file with empty passphrase. */
1.52 markus 640: private = key_load_private(identity_file, "", &comment);
641: if (private == NULL) {
1.12 markus 642: if (identity_passphrase)
643: old_passphrase = xstrdup(identity_passphrase);
644: else
1.65 markus 645: old_passphrase =
646: read_passphrase("Enter old passphrase: ",
647: RP_ALLOW_STDIN);
648: private = key_load_private(identity_file, old_passphrase,
649: &comment);
1.52 markus 650: memset(old_passphrase, 0, strlen(old_passphrase));
651: xfree(old_passphrase);
652: if (private == NULL) {
1.12 markus 653: printf("Bad passphrase.\n");
654: exit(1);
655: }
656: }
657: printf("Key has comment '%s'\n", comment);
658:
659: /* Ask the new passphrase (twice). */
660: if (identity_new_passphrase) {
661: passphrase1 = xstrdup(identity_new_passphrase);
662: passphrase2 = NULL;
663: } else {
664: passphrase1 =
1.65 markus 665: read_passphrase("Enter new passphrase (empty for no "
666: "passphrase): ", RP_ALLOW_STDIN);
667: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 668: RP_ALLOW_STDIN);
1.12 markus 669:
670: /* Verify that they are the same. */
671: if (strcmp(passphrase1, passphrase2) != 0) {
672: memset(passphrase1, 0, strlen(passphrase1));
673: memset(passphrase2, 0, strlen(passphrase2));
674: xfree(passphrase1);
675: xfree(passphrase2);
676: printf("Pass phrases do not match. Try again.\n");
677: exit(1);
678: }
679: /* Destroy the other copy. */
680: memset(passphrase2, 0, strlen(passphrase2));
681: xfree(passphrase2);
682: }
683:
684: /* Save the file using the new passphrase. */
1.52 markus 685: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 686: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 687: memset(passphrase1, 0, strlen(passphrase1));
688: xfree(passphrase1);
1.19 markus 689: key_free(private);
1.12 markus 690: xfree(comment);
691: exit(1);
692: }
693: /* Destroy the passphrase and the copy of the key in memory. */
694: memset(passphrase1, 0, strlen(passphrase1));
695: xfree(passphrase1);
1.19 markus 696: key_free(private); /* Destroys contents */
1.12 markus 697: xfree(comment);
1.1 deraadt 698:
1.12 markus 699: printf("Your identification has been saved with the new passphrase.\n");
700: exit(0);
1.1 deraadt 701: }
702:
1.13 deraadt 703: /*
704: * Change the comment of a private key file.
705: */
1.63 itojun 706: static void
1.2 provos 707: do_change_comment(struct passwd *pw)
1.1 deraadt 708: {
1.46 deraadt 709: char new_comment[1024], *comment, *passphrase;
1.52 markus 710: Key *private;
711: Key *public;
1.12 markus 712: struct stat st;
713: FILE *f;
1.46 deraadt 714: int fd;
1.12 markus 715:
716: if (!have_identity)
717: ask_filename(pw, "Enter file in which the key is");
718: if (stat(identity_file, &st) < 0) {
719: perror(identity_file);
720: exit(1);
721: }
1.52 markus 722: private = key_load_private(identity_file, "", &comment);
723: if (private == NULL) {
1.12 markus 724: if (identity_passphrase)
725: passphrase = xstrdup(identity_passphrase);
726: else if (identity_new_passphrase)
727: passphrase = xstrdup(identity_new_passphrase);
728: else
1.65 markus 729: passphrase = read_passphrase("Enter passphrase: ",
730: RP_ALLOW_STDIN);
1.12 markus 731: /* Try to load using the passphrase. */
1.52 markus 732: private = key_load_private(identity_file, passphrase, &comment);
733: if (private == NULL) {
1.12 markus 734: memset(passphrase, 0, strlen(passphrase));
735: xfree(passphrase);
736: printf("Bad passphrase.\n");
737: exit(1);
738: }
1.52 markus 739: } else {
740: passphrase = xstrdup("");
1.12 markus 741: }
1.52 markus 742: if (private->type != KEY_RSA1) {
743: fprintf(stderr, "Comments are only supported for RSA1 keys.\n");
744: key_free(private);
745: exit(1);
1.86 deraadt 746: }
1.12 markus 747: printf("Key now has comment '%s'\n", comment);
748:
749: if (identity_comment) {
750: strlcpy(new_comment, identity_comment, sizeof(new_comment));
751: } else {
752: printf("Enter new comment: ");
753: fflush(stdout);
754: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
755: memset(passphrase, 0, strlen(passphrase));
1.19 markus 756: key_free(private);
1.12 markus 757: exit(1);
758: }
759: if (strchr(new_comment, '\n'))
760: *strchr(new_comment, '\n') = 0;
761: }
762:
763: /* Save the file using the new passphrase. */
1.52 markus 764: if (!key_save_private(private, identity_file, passphrase, new_comment)) {
1.56 markus 765: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 766: memset(passphrase, 0, strlen(passphrase));
767: xfree(passphrase);
1.19 markus 768: key_free(private);
1.12 markus 769: xfree(comment);
770: exit(1);
771: }
772: memset(passphrase, 0, strlen(passphrase));
773: xfree(passphrase);
1.52 markus 774: public = key_from_private(private);
1.19 markus 775: key_free(private);
1.12 markus 776:
777: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 778: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
779: if (fd == -1) {
1.12 markus 780: printf("Could not save your public key in %s\n", identity_file);
781: exit(1);
782: }
1.46 deraadt 783: f = fdopen(fd, "w");
784: if (f == NULL) {
785: printf("fdopen %s failed", identity_file);
786: exit(1);
787: }
1.19 markus 788: if (!key_write(public, f))
789: fprintf(stderr, "write key failed");
790: key_free(public);
791: fprintf(f, " %s\n", new_comment);
1.12 markus 792: fclose(f);
1.1 deraadt 793:
1.12 markus 794: xfree(comment);
1.1 deraadt 795:
1.12 markus 796: printf("The comment in your key file has been changed.\n");
797: exit(0);
1.1 deraadt 798: }
799:
1.63 itojun 800: static void
1.10 markus 801: usage(void)
802: {
1.77 jakob 803: fprintf(stderr, "Usage: %s [options]\n", __progname);
804: fprintf(stderr, "Options:\n");
805: fprintf(stderr, " -b bits Number of bits in the key to create.\n");
806: fprintf(stderr, " -c Change comment in private and public key files.\n");
807: fprintf(stderr, " -e Convert OpenSSH to IETF SECSH key file.\n");
808: fprintf(stderr, " -f filename Filename of the key file.\n");
809: fprintf(stderr, " -i Convert IETF SECSH to OpenSSH key file.\n");
810: fprintf(stderr, " -l Show fingerprint of key file.\n");
811: fprintf(stderr, " -p Change passphrase of private key file.\n");
812: fprintf(stderr, " -q Quiet.\n");
813: fprintf(stderr, " -y Read private key file and print public key.\n");
814: fprintf(stderr, " -t type Specify type of key to create.\n");
815: fprintf(stderr, " -B Show bubblebabble digest of key file.\n");
816: fprintf(stderr, " -C comment Provide new comment.\n");
817: fprintf(stderr, " -N phrase Provide new passphrase.\n");
818: fprintf(stderr, " -P phrase Provide old passphrase.\n");
819: #ifdef SMARTCARD
820: fprintf(stderr, " -D reader Download public key from smartcard.\n");
821: fprintf(stderr, " -U reader Upload private key to smartcard.\n");
822: #endif /* SMARTCARD */
823:
1.12 markus 824: exit(1);
1.10 markus 825: }
826:
1.13 deraadt 827: /*
828: * Main program for key management.
829: */
1.2 provos 830: int
831: main(int ac, char **av)
1.1 deraadt 832: {
1.87 ! djm 833: char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2;
1.75 markus 834: char *reader_id = NULL;
1.46 deraadt 835: Key *private, *public;
1.12 markus 836: struct passwd *pw;
837: struct stat st;
1.75 markus 838: int opt, type, fd, download = 0;
1.12 markus 839: FILE *f;
1.33 markus 840:
1.12 markus 841: extern int optind;
842: extern char *optarg;
843:
1.26 markus 844: SSLeay_add_all_algorithms();
1.19 markus 845:
1.14 markus 846: /* we need this for the home * directory. */
1.12 markus 847: pw = getpwuid(getuid());
848: if (!pw) {
849: printf("You don't exist, go away!\n");
850: exit(1);
851: }
1.19 markus 852: if (gethostname(hostname, sizeof(hostname)) < 0) {
853: perror("gethostname");
854: exit(1);
855: }
1.14 markus 856:
1.76 jakob 857: while ((opt = getopt(ac, av, "deiqpclBRxXyb:f:t:U:D:P:N:C:")) != -1) {
1.12 markus 858: switch (opt) {
859: case 'b':
860: bits = atoi(optarg);
861: if (bits < 512 || bits > 32768) {
862: printf("Bits has bad value.\n");
863: exit(1);
864: }
865: break;
866: case 'l':
867: print_fingerprint = 1;
868: break;
1.49 markus 869: case 'B':
870: print_bubblebabble = 1;
871: break;
1.12 markus 872: case 'p':
873: change_passphrase = 1;
874: break;
875: case 'c':
876: change_comment = 1;
877: break;
878: case 'f':
879: strlcpy(identity_file, optarg, sizeof(identity_file));
880: have_identity = 1;
881: break;
882: case 'P':
883: identity_passphrase = optarg;
884: break;
885: case 'N':
886: identity_new_passphrase = optarg;
887: break;
888: case 'C':
889: identity_comment = optarg;
890: break;
891: case 'q':
892: quiet = 1;
1.20 deraadt 893: break;
894: case 'R':
1.33 markus 895: /* unused */
896: exit(0);
1.12 markus 897: break;
1.57 markus 898: case 'e':
1.19 markus 899: case 'x':
1.57 markus 900: /* export key */
1.19 markus 901: convert_to_ssh2 = 1;
902: break;
1.57 markus 903: case 'i':
1.19 markus 904: case 'X':
1.57 markus 905: /* import key */
1.19 markus 906: convert_from_ssh2 = 1;
907: break;
908: case 'y':
909: print_public = 1;
1.47 jakob 910: break;
1.19 markus 911: case 'd':
1.33 markus 912: key_type_name = "dsa";
1.19 markus 913: break;
1.33 markus 914: case 't':
915: key_type_name = optarg;
916: break;
1.75 markus 917: case 'D':
918: download = 1;
1.76 jakob 919: case 'U':
1.75 markus 920: reader_id = optarg;
1.66 markus 921: break;
1.12 markus 922: case '?':
923: default:
924: usage();
925: }
926: }
927: if (optind < ac) {
928: printf("Too many arguments.\n");
1.87 ! djm 929: usage();
! 930: }
! 931: if (key_type_name == NULL) {
! 932: printf("You must specify a key type (-t).\n");
1.12 markus 933: usage();
934: }
935: if (change_passphrase && change_comment) {
936: printf("Can only have one of -p and -c.\n");
937: usage();
938: }
1.49 markus 939: if (print_fingerprint || print_bubblebabble)
1.12 markus 940: do_fingerprint(pw);
941: if (change_passphrase)
942: do_change_passphrase(pw);
943: if (change_comment)
944: do_change_comment(pw);
1.19 markus 945: if (convert_to_ssh2)
946: do_convert_to_ssh2(pw);
947: if (convert_from_ssh2)
948: do_convert_from_ssh2(pw);
949: if (print_public)
950: do_print_public(pw);
1.75 markus 951: if (reader_id != NULL) {
1.74 markus 952: #ifdef SMARTCARD
1.75 markus 953: if (download)
954: do_download(pw, reader_id);
955: else
956: do_upload(pw, reader_id);
1.78 jakob 957: #else /* SMARTCARD */
1.74 markus 958: fatal("no support for smartcards.");
1.78 jakob 959: #endif /* SMARTCARD */
1.75 markus 960: }
1.12 markus 961:
962: arc4random_stir();
963:
1.35 markus 964: type = key_type_from_name(key_type_name);
965: if (type == KEY_UNSPEC) {
966: fprintf(stderr, "unknown key type %s\n", key_type_name);
967: exit(1);
1.19 markus 968: }
1.33 markus 969: if (!quiet)
1.35 markus 970: printf("Generating public/private %s key pair.\n", key_type_name);
1.33 markus 971: private = key_generate(type, bits);
972: if (private == NULL) {
973: fprintf(stderr, "key_generate failed");
974: exit(1);
975: }
976: public = key_from_private(private);
1.12 markus 977:
978: if (!have_identity)
979: ask_filename(pw, "Enter file in which to save the key");
980:
981: /* Create ~/.ssh directory if it doesn\'t already exist. */
1.40 markus 982: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
1.12 markus 983: if (strstr(identity_file, dotsshdir) != NULL &&
984: stat(dotsshdir, &st) < 0) {
1.29 djm 985: if (mkdir(dotsshdir, 0700) < 0)
1.12 markus 986: error("Could not create directory '%s'.", dotsshdir);
987: else if (!quiet)
988: printf("Created directory '%s'.\n", dotsshdir);
989: }
990: /* If the file already exists, ask the user to confirm. */
991: if (stat(identity_file, &st) >= 0) {
992: char yesno[3];
993: printf("%s already exists.\n", identity_file);
994: printf("Overwrite (y/n)? ");
995: fflush(stdout);
996: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
997: exit(1);
998: if (yesno[0] != 'y' && yesno[0] != 'Y')
999: exit(1);
1000: }
1001: /* Ask for a passphrase (twice). */
1002: if (identity_passphrase)
1003: passphrase1 = xstrdup(identity_passphrase);
1004: else if (identity_new_passphrase)
1005: passphrase1 = xstrdup(identity_new_passphrase);
1006: else {
1007: passphrase_again:
1008: passphrase1 =
1.65 markus 1009: read_passphrase("Enter passphrase (empty for no "
1010: "passphrase): ", RP_ALLOW_STDIN);
1011: passphrase2 = read_passphrase("Enter same passphrase again: ",
1012: RP_ALLOW_STDIN);
1.12 markus 1013: if (strcmp(passphrase1, passphrase2) != 0) {
1.65 markus 1014: /*
1015: * The passphrases do not match. Clear them and
1016: * retry.
1017: */
1.12 markus 1018: memset(passphrase1, 0, strlen(passphrase1));
1019: memset(passphrase2, 0, strlen(passphrase2));
1020: xfree(passphrase1);
1021: xfree(passphrase2);
1022: printf("Passphrases do not match. Try again.\n");
1023: goto passphrase_again;
1024: }
1025: /* Clear the other copy of the passphrase. */
1026: memset(passphrase2, 0, strlen(passphrase2));
1027: xfree(passphrase2);
1028: }
1029:
1030: if (identity_comment) {
1031: strlcpy(comment, identity_comment, sizeof(comment));
1032: } else {
1.18 markus 1033: /* Create default commend field for the passphrase. */
1.12 markus 1034: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
1035: }
1036:
1037: /* Save the key with the given passphrase and comment. */
1.52 markus 1038: if (!key_save_private(private, identity_file, passphrase1, comment)) {
1.56 markus 1039: printf("Saving the key failed: %s.\n", identity_file);
1.12 markus 1040: memset(passphrase1, 0, strlen(passphrase1));
1041: xfree(passphrase1);
1042: exit(1);
1043: }
1044: /* Clear the passphrase. */
1045: memset(passphrase1, 0, strlen(passphrase1));
1046: xfree(passphrase1);
1047:
1048: /* Clear the private key and the random number generator. */
1.33 markus 1049: key_free(private);
1.12 markus 1050: arc4random_stir();
1051:
1052: if (!quiet)
1053: printf("Your identification has been saved in %s.\n", identity_file);
1054:
1055: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1056: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1057: if (fd == -1) {
1.12 markus 1058: printf("Could not save your public key in %s\n", identity_file);
1.46 deraadt 1059: exit(1);
1060: }
1061: f = fdopen(fd, "w");
1062: if (f == NULL) {
1063: printf("fdopen %s failed", identity_file);
1.12 markus 1064: exit(1);
1065: }
1.19 markus 1066: if (!key_write(public, f))
1067: fprintf(stderr, "write key failed");
1068: fprintf(f, " %s\n", comment);
1.12 markus 1069: fclose(f);
1070:
1071: if (!quiet) {
1.50 markus 1072: char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
1.19 markus 1073: printf("Your public key has been saved in %s.\n",
1074: identity_file);
1.12 markus 1075: printf("The key fingerprint is:\n");
1.50 markus 1076: printf("%s %s\n", fp, comment);
1077: xfree(fp);
1.12 markus 1078: }
1.19 markus 1079:
1080: key_free(public);
1.12 markus 1081: exit(0);
1.1 deraadt 1082: }
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