Annotation of src/usr.bin/ssh/ssh-keygen.c, Revision 1.388
1.388 ! djm 1: /* $OpenBSD: ssh-keygen.c,v 1.387 2020/01/23 07:54:04 djm Exp $ */
1.1 deraadt 2: /*
1.13 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Identity and host key generation and maintenance.
1.31 deraadt 7: *
8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
1.13 deraadt 13: */
1.1 deraadt 14:
1.136 stevesk 15: #include <sys/types.h>
1.174 dtucker 16: #include <sys/socket.h>
1.136 stevesk 17: #include <sys/stat.h>
1.19 markus 18:
1.348 djm 19: #ifdef WITH_OPENSSL
1.19 markus 20: #include <openssl/evp.h>
21: #include <openssl/pem.h>
1.348 djm 22: #endif
1.145 stevesk 23:
1.347 djm 24: #include <stdint.h>
1.148 stevesk 25: #include <errno.h>
1.147 stevesk 26: #include <fcntl.h>
1.248 djm 27: #include <netdb.h>
1.145 stevesk 28: #include <pwd.h>
1.153 stevesk 29: #include <stdio.h>
1.152 stevesk 30: #include <stdlib.h>
1.150 stevesk 31: #include <string.h>
1.368 naddy 32: #include <stdarg.h>
1.149 stevesk 33: #include <unistd.h>
1.253 deraadt 34: #include <limits.h>
1.294 djm 35: #include <locale.h>
1.1 deraadt 36:
37: #include "xmalloc.h"
1.252 djm 38: #include "sshkey.h"
1.19 markus 39: #include "authfile.h"
1.252 djm 40: #include "sshbuf.h"
1.40 markus 41: #include "pathnames.h"
1.41 markus 42: #include "log.h"
1.114 djm 43: #include "misc.h"
1.119 djm 44: #include "match.h"
45: #include "hostfile.h"
1.146 stevesk 46: #include "dns.h"
1.223 djm 47: #include "ssh.h"
1.179 djm 48: #include "ssh2.h"
1.252 djm 49: #include "ssherr.h"
1.223 djm 50: #include "atomicio.h"
51: #include "krl.h"
1.251 djm 52: #include "digest.h"
1.294 djm 53: #include "utf8.h"
1.305 djm 54: #include "authfd.h"
1.344 djm 55: #include "sshsig.h"
1.357 djm 56: #include "ssh-sk.h"
57: #include "sk-api.h" /* XXX for SSH_SK_USER_PRESENCE_REQD; remove */
1.32 markus 58:
1.177 markus 59: #ifdef ENABLE_PKCS11
60: #include "ssh-pkcs11.h"
1.106 djm 61: #endif
1.66 markus 62:
1.273 djm 63: #ifdef WITH_OPENSSL
64: # define DEFAULT_KEY_TYPE_NAME "rsa"
65: #else
66: # define DEFAULT_KEY_TYPE_NAME "ed25519"
67: #endif
68:
1.328 dtucker 69: /*
1.329 dtucker 70: * Default number of bits in the RSA, DSA and ECDSA keys. These value can be
71: * overridden on the command line.
72: *
73: * These values, with the exception of DSA, provide security equivalent to at
74: * least 128 bits of security according to NIST Special Publication 800-57:
75: * Recommendation for Key Management Part 1 rev 4 section 5.6.1.
76: * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for
77: * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only
78: * SHA1 we limit the DSA key size 1k bits.
1.328 dtucker 79: */
80: #define DEFAULT_BITS 3072
1.130 markus 81: #define DEFAULT_BITS_DSA 1024
1.203 naddy 82: #define DEFAULT_BITS_ECDSA 256
1.1 deraadt 83:
1.325 djm 84: static int quiet = 0;
1.182 djm 85:
1.8 markus 86: /* Flag indicating that we just want to see the key fingerprint */
1.325 djm 87: static int print_fingerprint = 0;
88: static int print_bubblebabble = 0;
1.8 markus 89:
1.251 djm 90: /* Hash algorithm to use for fingerprints. */
1.325 djm 91: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
1.251 djm 92:
1.10 markus 93: /* The identity file name, given on the command line or entered by the user. */
1.351 deraadt 94: static char identity_file[PATH_MAX];
1.325 djm 95: static int have_identity = 0;
1.1 deraadt 96:
97: /* This is set to the passphrase if given on the command line. */
1.325 djm 98: static char *identity_passphrase = NULL;
1.1 deraadt 99:
100: /* This is set to the new passphrase if given on the command line. */
1.325 djm 101: static char *identity_new_passphrase = NULL;
1.186 djm 102:
1.179 djm 103: /* Key type when certifying */
1.325 djm 104: static u_int cert_key_type = SSH2_CERT_TYPE_USER;
1.179 djm 105:
106: /* "key ID" of signed key */
1.325 djm 107: static char *cert_key_id = NULL;
1.179 djm 108:
109: /* Comma-separated list of principal names for certifying keys */
1.325 djm 110: static char *cert_principals = NULL;
1.179 djm 111:
112: /* Validity period for certificates */
1.325 djm 113: static u_int64_t cert_valid_from = 0;
114: static u_int64_t cert_valid_to = ~0ULL;
1.179 djm 115:
1.186 djm 116: /* Certificate options */
1.371 djm 117: #define CERTOPT_X_FWD (1)
118: #define CERTOPT_AGENT_FWD (1<<1)
119: #define CERTOPT_PORT_FWD (1<<2)
120: #define CERTOPT_PTY (1<<3)
121: #define CERTOPT_USER_RC (1<<4)
122: #define CERTOPT_NO_REQUIRE_USER_PRESENCE (1<<5)
1.190 djm 123: #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \
124: CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC)
1.325 djm 125: static u_int32_t certflags_flags = CERTOPT_DEFAULT;
126: static char *certflags_command = NULL;
127: static char *certflags_src_addr = NULL;
1.179 djm 128:
1.300 djm 129: /* Arbitrary extensions specified by user */
130: struct cert_userext {
131: char *key;
132: char *val;
133: int crit;
134: };
1.325 djm 135: static struct cert_userext *cert_userext;
136: static size_t ncert_userext;
1.300 djm 137:
1.193 djm 138: /* Conversion to/from various formats */
139: enum {
140: FMT_RFC4716,
141: FMT_PKCS8,
142: FMT_PEM
143: } convert_format = FMT_RFC4716;
1.33 markus 144:
1.325 djm 145: static char *key_type_name = NULL;
1.19 markus 146:
1.197 djm 147: /* Load key from this PKCS#11 provider */
1.325 djm 148: static char *pkcs11provider = NULL;
1.193 djm 149:
1.357 djm 150: /* FIDO/U2F provider to use */
151: static char *sk_provider = NULL;
152:
1.336 djm 153: /* Format for writing private keys */
154: static int private_key_format = SSHKEY_PRIVATE_OPENSSH;
1.237 markus 155:
156: /* Cipher for new-format private keys */
1.336 djm 157: static char *openssh_format_cipher = NULL;
1.237 markus 158:
1.376 djm 159: /* Number of KDF rounds to derive new format keys. */
1.325 djm 160: static int rounds = 0;
1.237 markus 161:
1.10 markus 162: /* argv0 */
163: extern char *__progname;
1.1 deraadt 164:
1.325 djm 165: static char hostname[NI_MAXHOST];
1.19 markus 166:
1.274 djm 167: #ifdef WITH_OPENSSL
1.115 djm 168: /* moduli.c */
1.124 avsm 169: int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *);
1.215 dtucker 170: int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long,
171: unsigned long);
1.274 djm 172: #endif
1.115 djm 173:
1.63 itojun 174: static void
1.255 djm 175: type_bits_valid(int type, const char *name, u_int32_t *bitsp)
1.206 stevesk 176: {
1.269 djm 177: if (type == KEY_UNSPEC)
178: fatal("unknown key type %s", key_type_name);
1.209 djm 179: if (*bitsp == 0) {
1.271 djm 180: #ifdef WITH_OPENSSL
1.339 naddy 181: u_int nid;
182:
183: switch(type) {
184: case KEY_DSA:
1.209 djm 185: *bitsp = DEFAULT_BITS_DSA;
1.339 naddy 186: break;
187: case KEY_ECDSA:
1.255 djm 188: if (name != NULL &&
189: (nid = sshkey_ecdsa_nid_from_name(name)) > 0)
190: *bitsp = sshkey_curve_nid_to_bits(nid);
191: if (*bitsp == 0)
192: *bitsp = DEFAULT_BITS_ECDSA;
1.339 naddy 193: break;
194: case KEY_RSA:
195: *bitsp = DEFAULT_BITS;
196: break;
197: }
1.271 djm 198: #endif
1.206 stevesk 199: }
1.271 djm 200: #ifdef WITH_OPENSSL
1.303 djm 201: switch (type) {
202: case KEY_DSA:
203: if (*bitsp != 1024)
204: fatal("Invalid DSA key length: must be 1024 bits");
205: break;
206: case KEY_RSA:
207: if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE)
208: fatal("Invalid RSA key length: minimum is %d bits",
209: SSH_RSA_MINIMUM_MODULUS_SIZE);
1.339 naddy 210: else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS)
211: fatal("Invalid RSA key length: maximum is %d bits",
212: OPENSSL_RSA_MAX_MODULUS_BITS);
1.303 djm 213: break;
214: case KEY_ECDSA:
215: if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1)
216: fatal("Invalid ECDSA key length: valid lengths are "
217: "256, 384 or 521 bits");
218: }
1.246 markus 219: #endif
1.206 stevesk 220: }
221:
1.343 djm 222: /*
223: * Checks whether a file exists and, if so, asks the user whether they wish
224: * to overwrite it.
225: * Returns nonzero if the file does not already exist or if the user agrees to
226: * overwrite, or zero otherwise.
227: */
228: static int
229: confirm_overwrite(const char *filename)
230: {
231: char yesno[3];
232: struct stat st;
233:
234: if (stat(filename, &st) != 0)
235: return 1;
236: printf("%s already exists.\n", filename);
237: printf("Overwrite (y/n)? ");
238: fflush(stdout);
239: if (fgets(yesno, sizeof(yesno), stdin) == NULL)
240: return 0;
241: if (yesno[0] != 'y' && yesno[0] != 'Y')
242: return 0;
243: return 1;
244: }
245:
1.206 stevesk 246: static void
1.10 markus 247: ask_filename(struct passwd *pw, const char *prompt)
1.1 deraadt 248: {
1.12 markus 249: char buf[1024];
1.35 markus 250: char *name = NULL;
251:
1.92 stevesk 252: if (key_type_name == NULL)
1.40 markus 253: name = _PATH_SSH_CLIENT_ID_RSA;
1.140 deraadt 254: else {
1.252 djm 255: switch (sshkey_type_from_name(key_type_name)) {
1.186 djm 256: case KEY_DSA_CERT:
1.92 stevesk 257: case KEY_DSA:
258: name = _PATH_SSH_CLIENT_ID_DSA;
259: break;
1.200 djm 260: case KEY_ECDSA_CERT:
261: case KEY_ECDSA:
262: name = _PATH_SSH_CLIENT_ID_ECDSA;
263: break;
1.357 djm 264: case KEY_ECDSA_SK_CERT:
265: case KEY_ECDSA_SK:
266: name = _PATH_SSH_CLIENT_ID_ECDSA_SK;
267: break;
1.186 djm 268: case KEY_RSA_CERT:
1.92 stevesk 269: case KEY_RSA:
270: name = _PATH_SSH_CLIENT_ID_RSA;
271: break;
1.238 markus 272: case KEY_ED25519:
273: case KEY_ED25519_CERT:
274: name = _PATH_SSH_CLIENT_ID_ED25519;
275: break;
1.362 markus 276: case KEY_ED25519_SK:
277: case KEY_ED25519_SK_CERT:
278: name = _PATH_SSH_CLIENT_ID_ED25519_SK;
279: break;
1.313 markus 280: case KEY_XMSS:
281: case KEY_XMSS_CERT:
282: name = _PATH_SSH_CLIENT_ID_XMSS;
283: break;
1.92 stevesk 284: default:
1.269 djm 285: fatal("bad key type");
1.92 stevesk 286: }
1.140 deraadt 287: }
1.269 djm 288: snprintf(identity_file, sizeof(identity_file),
289: "%s/%s", pw->pw_dir, name);
290: printf("%s (%s): ", prompt, identity_file);
291: fflush(stdout);
1.12 markus 292: if (fgets(buf, sizeof(buf), stdin) == NULL)
293: exit(1);
1.162 gilles 294: buf[strcspn(buf, "\n")] = '\0';
1.12 markus 295: if (strcmp(buf, "") != 0)
296: strlcpy(identity_file, buf, sizeof(identity_file));
297: have_identity = 1;
1.7 markus 298: }
299:
1.252 djm 300: static struct sshkey *
1.342 djm 301: load_identity(const char *filename, char **commentp)
1.19 markus 302: {
1.52 markus 303: char *pass;
1.252 djm 304: struct sshkey *prv;
305: int r;
1.52 markus 306:
1.341 djm 307: if (commentp != NULL)
308: *commentp = NULL;
309: if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0)
1.252 djm 310: return prv;
311: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
312: fatal("Load key \"%s\": %s", filename, ssh_err(r));
313: if (identity_passphrase)
314: pass = xstrdup(identity_passphrase);
315: else
316: pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN);
1.341 djm 317: r = sshkey_load_private(filename, pass, &prv, commentp);
1.252 djm 318: explicit_bzero(pass, strlen(pass));
319: free(pass);
320: if (r != 0)
321: fatal("Load key \"%s\": %s", filename, ssh_err(r));
1.52 markus 322: return prv;
1.19 markus 323: }
324:
1.32 markus 325: #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----"
1.100 deraadt 326: #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----"
1.32 markus 327: #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----"
1.42 stevesk 328: #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb
1.19 markus 329:
1.246 markus 330: #ifdef WITH_OPENSSL
1.63 itojun 331: static void
1.252 djm 332: do_convert_to_ssh2(struct passwd *pw, struct sshkey *k)
1.19 markus 333: {
1.337 djm 334: struct sshbuf *b;
335: char comment[61], *b64;
1.252 djm 336: int r;
1.19 markus 337:
1.337 djm 338: if ((b = sshbuf_new()) == NULL)
339: fatal("%s: sshbuf_new failed", __func__);
340: if ((r = sshkey_putb(k, b)) != 0)
1.269 djm 341: fatal("key_to_blob failed: %s", ssh_err(r));
1.337 djm 342: if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL)
343: fatal("%s: sshbuf_dtob64_string failed", __func__);
344:
1.176 djm 345: /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */
346: snprintf(comment, sizeof(comment),
347: "%u-bit %s, converted by %s@%s from OpenSSH",
1.252 djm 348: sshkey_size(k), sshkey_type(k),
1.19 markus 349: pw->pw_name, hostname);
1.176 djm 350:
1.337 djm 351: sshkey_free(k);
352: sshbuf_free(b);
353:
1.176 djm 354: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
1.337 djm 355: fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64);
1.32 markus 356: fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
1.337 djm 357: free(b64);
1.19 markus 358: exit(0);
359: }
360:
1.63 itojun 361: static void
1.252 djm 362: do_convert_to_pkcs8(struct sshkey *k)
1.193 djm 363: {
1.252 djm 364: switch (sshkey_type_plain(k->type)) {
1.193 djm 365: case KEY_RSA:
366: if (!PEM_write_RSA_PUBKEY(stdout, k->rsa))
367: fatal("PEM_write_RSA_PUBKEY failed");
368: break;
369: case KEY_DSA:
370: if (!PEM_write_DSA_PUBKEY(stdout, k->dsa))
371: fatal("PEM_write_DSA_PUBKEY failed");
372: break;
1.200 djm 373: case KEY_ECDSA:
374: if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa))
375: fatal("PEM_write_EC_PUBKEY failed");
376: break;
1.193 djm 377: default:
1.252 djm 378: fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
1.193 djm 379: }
380: exit(0);
381: }
382:
383: static void
1.252 djm 384: do_convert_to_pem(struct sshkey *k)
1.193 djm 385: {
1.252 djm 386: switch (sshkey_type_plain(k->type)) {
1.193 djm 387: case KEY_RSA:
388: if (!PEM_write_RSAPublicKey(stdout, k->rsa))
389: fatal("PEM_write_RSAPublicKey failed");
390: break;
391: default:
1.252 djm 392: fatal("%s: unsupported key type %s", __func__, sshkey_type(k));
1.193 djm 393: }
394: exit(0);
395: }
396:
397: static void
398: do_convert_to(struct passwd *pw)
399: {
1.252 djm 400: struct sshkey *k;
1.193 djm 401: struct stat st;
1.252 djm 402: int r;
1.193 djm 403:
404: if (!have_identity)
405: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 406: if (stat(identity_file, &st) == -1)
1.193 djm 407: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.252 djm 408: if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0)
1.341 djm 409: k = load_identity(identity_file, NULL);
1.193 djm 410: switch (convert_format) {
411: case FMT_RFC4716:
412: do_convert_to_ssh2(pw, k);
413: break;
414: case FMT_PKCS8:
415: do_convert_to_pkcs8(k);
416: break;
417: case FMT_PEM:
418: do_convert_to_pem(k);
419: break;
420: default:
421: fatal("%s: unknown key format %d", __func__, convert_format);
422: }
423: exit(0);
424: }
425:
1.252 djm 426: /*
427: * This is almost exactly the bignum1 encoding, but with 32 bit for length
428: * instead of 16.
429: */
1.193 djm 430: static void
1.252 djm 431: buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value)
1.32 markus 432: {
1.252 djm 433: u_int bytes, bignum_bits;
434: int r;
1.53 markus 435:
1.252 djm 436: if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0)
437: fatal("%s: buffer error: %s", __func__, ssh_err(r));
438: bytes = (bignum_bits + 7) / 8;
439: if (sshbuf_len(b) < bytes)
440: fatal("%s: input buffer too small: need %d have %zu",
441: __func__, bytes, sshbuf_len(b));
442: if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL)
443: fatal("%s: BN_bin2bn failed", __func__);
444: if ((r = sshbuf_consume(b, bytes)) != 0)
445: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.32 markus 446: }
447:
1.252 djm 448: static struct sshkey *
1.337 djm 449: do_convert_private_ssh2(struct sshbuf *b)
1.32 markus 450: {
1.252 djm 451: struct sshkey *key = NULL;
1.64 markus 452: char *type, *cipher;
1.252 djm 453: u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345";
454: int r, rlen, ktype;
455: u_int magic, i1, i2, i3, i4;
456: size_t slen;
1.62 markus 457: u_long e;
1.321 djm 458: BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL;
459: BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL;
460: BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL;
461: BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL;
1.337 djm 462:
1.252 djm 463: if ((r = sshbuf_get_u32(b, &magic)) != 0)
464: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.32 markus 465:
466: if (magic != SSH_COM_PRIVATE_KEY_MAGIC) {
1.252 djm 467: error("bad magic 0x%x != 0x%x", magic,
468: SSH_COM_PRIVATE_KEY_MAGIC);
1.32 markus 469: return NULL;
470: }
1.252 djm 471: if ((r = sshbuf_get_u32(b, &i1)) != 0 ||
472: (r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
473: (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 ||
474: (r = sshbuf_get_u32(b, &i2)) != 0 ||
475: (r = sshbuf_get_u32(b, &i3)) != 0 ||
476: (r = sshbuf_get_u32(b, &i4)) != 0)
477: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.158 stevesk 478: debug("ignore (%d %d %d %d)", i1, i2, i3, i4);
1.32 markus 479: if (strcmp(cipher, "none") != 0) {
480: error("unsupported cipher %s", cipher);
1.227 djm 481: free(cipher);
482: free(type);
1.32 markus 483: return NULL;
484: }
1.227 djm 485: free(cipher);
1.32 markus 486:
1.53 markus 487: if (strstr(type, "dsa")) {
488: ktype = KEY_DSA;
489: } else if (strstr(type, "rsa")) {
490: ktype = KEY_RSA;
491: } else {
1.227 djm 492: free(type);
1.32 markus 493: return NULL;
494: }
1.322 djm 495: if ((key = sshkey_new(ktype)) == NULL)
496: fatal("sshkey_new failed");
1.227 djm 497: free(type);
1.53 markus 498:
499: switch (key->type) {
500: case KEY_DSA:
1.321 djm 501: if ((dsa_p = BN_new()) == NULL ||
502: (dsa_q = BN_new()) == NULL ||
503: (dsa_g = BN_new()) == NULL ||
504: (dsa_pub_key = BN_new()) == NULL ||
505: (dsa_priv_key = BN_new()) == NULL)
506: fatal("%s: BN_new", __func__);
507: buffer_get_bignum_bits(b, dsa_p);
508: buffer_get_bignum_bits(b, dsa_g);
509: buffer_get_bignum_bits(b, dsa_q);
510: buffer_get_bignum_bits(b, dsa_pub_key);
511: buffer_get_bignum_bits(b, dsa_priv_key);
512: if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g))
513: fatal("%s: DSA_set0_pqg failed", __func__);
514: dsa_p = dsa_q = dsa_g = NULL; /* transferred */
515: if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key))
516: fatal("%s: DSA_set0_key failed", __func__);
517: dsa_pub_key = dsa_priv_key = NULL; /* transferred */
1.53 markus 518: break;
519: case KEY_RSA:
1.252 djm 520: if ((r = sshbuf_get_u8(b, &e1)) != 0 ||
521: (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) ||
522: (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0))
523: fatal("%s: buffer error: %s", __func__, ssh_err(r));
524: e = e1;
1.62 markus 525: debug("e %lx", e);
526: if (e < 30) {
527: e <<= 8;
1.252 djm 528: e += e2;
1.62 markus 529: debug("e %lx", e);
530: e <<= 8;
1.252 djm 531: e += e3;
1.62 markus 532: debug("e %lx", e);
533: }
1.321 djm 534: if ((rsa_e = BN_new()) == NULL)
535: fatal("%s: BN_new", __func__);
536: if (!BN_set_word(rsa_e, e)) {
537: BN_clear_free(rsa_e);
1.252 djm 538: sshkey_free(key);
1.53 markus 539: return NULL;
540: }
1.321 djm 541: if ((rsa_n = BN_new()) == NULL ||
542: (rsa_d = BN_new()) == NULL ||
543: (rsa_p = BN_new()) == NULL ||
544: (rsa_q = BN_new()) == NULL ||
545: (rsa_iqmp = BN_new()) == NULL)
546: fatal("%s: BN_new", __func__);
547: buffer_get_bignum_bits(b, rsa_d);
548: buffer_get_bignum_bits(b, rsa_n);
549: buffer_get_bignum_bits(b, rsa_iqmp);
550: buffer_get_bignum_bits(b, rsa_q);
551: buffer_get_bignum_bits(b, rsa_p);
552: if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d))
553: fatal("%s: RSA_set0_key failed", __func__);
554: rsa_n = rsa_e = rsa_d = NULL; /* transferred */
555: if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q))
556: fatal("%s: RSA_set0_factors failed", __func__);
557: rsa_p = rsa_q = NULL; /* transferred */
558: if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0)
1.252 djm 559: fatal("generate RSA parameters failed: %s", ssh_err(r));
1.321 djm 560: BN_clear_free(rsa_iqmp);
1.53 markus 561: break;
562: }
1.252 djm 563: rlen = sshbuf_len(b);
1.85 deraadt 564: if (rlen != 0)
1.337 djm 565: error("%s: remaining bytes in key blob %d", __func__, rlen);
1.64 markus 566:
567: /* try the key */
1.358 djm 568: if (sshkey_sign(key, &sig, &slen, data, sizeof(data),
569: NULL, NULL, 0) != 0 ||
570: sshkey_verify(key, sig, slen, data, sizeof(data),
1.370 djm 571: NULL, 0, NULL) != 0) {
1.252 djm 572: sshkey_free(key);
573: free(sig);
574: return NULL;
575: }
1.227 djm 576: free(sig);
1.32 markus 577: return key;
578: }
579:
1.137 dtucker 580: static int
581: get_line(FILE *fp, char *line, size_t len)
582: {
583: int c;
584: size_t pos = 0;
585:
586: line[0] = '\0';
587: while ((c = fgetc(fp)) != EOF) {
1.269 djm 588: if (pos >= len - 1)
589: fatal("input line too long.");
1.140 deraadt 590: switch (c) {
1.137 dtucker 591: case '\r':
592: c = fgetc(fp);
1.269 djm 593: if (c != EOF && c != '\n' && ungetc(c, fp) == EOF)
594: fatal("unget: %s", strerror(errno));
1.137 dtucker 595: return pos;
596: case '\n':
597: return pos;
598: }
599: line[pos++] = c;
600: line[pos] = '\0';
601: }
1.157 stevesk 602: /* We reached EOF */
603: return -1;
1.137 dtucker 604: }
605:
1.63 itojun 606: static void
1.252 djm 607: do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private)
1.19 markus 608: {
1.252 djm 609: int r, blen, escaped = 0;
1.98 markus 610: u_int len;
1.137 dtucker 611: char line[1024];
1.337 djm 612: struct sshbuf *buf;
1.19 markus 613: char encoded[8096];
614: FILE *fp;
615:
1.337 djm 616: if ((buf = sshbuf_new()) == NULL)
617: fatal("sshbuf_new failed");
1.191 djm 618: if ((fp = fopen(identity_file, "r")) == NULL)
619: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
1.19 markus 620: encoded[0] = '\0';
1.137 dtucker 621: while ((blen = get_line(fp, line, sizeof(line))) != -1) {
1.228 djm 622: if (blen > 0 && line[blen - 1] == '\\')
1.25 markus 623: escaped++;
1.19 markus 624: if (strncmp(line, "----", 4) == 0 ||
625: strstr(line, ": ") != NULL) {
1.32 markus 626: if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
1.193 djm 627: *private = 1;
1.64 markus 628: if (strstr(line, " END ") != NULL) {
629: break;
630: }
1.60 markus 631: /* fprintf(stderr, "ignore: %s", line); */
1.19 markus 632: continue;
633: }
1.25 markus 634: if (escaped) {
635: escaped--;
1.60 markus 636: /* fprintf(stderr, "escaped: %s", line); */
1.25 markus 637: continue;
1.19 markus 638: }
639: strlcat(encoded, line, sizeof(encoded));
640: }
1.98 markus 641: len = strlen(encoded);
642: if (((len % 4) == 3) &&
643: (encoded[len-1] == '=') &&
644: (encoded[len-2] == '=') &&
645: (encoded[len-3] == '='))
646: encoded[len-3] = '\0';
1.337 djm 647: if ((r = sshbuf_b64tod(buf, encoded)) != 0)
648: fatal("%s: base64 decoding failed: %s", __func__, ssh_err(r));
1.252 djm 649: if (*private)
1.337 djm 650: *k = do_convert_private_ssh2(buf);
651: else if ((r = sshkey_fromb(buf, k)) != 0)
1.269 djm 652: fatal("decode blob failed: %s", ssh_err(r));
1.356 djm 653: sshbuf_free(buf);
1.193 djm 654: fclose(fp);
655: }
656:
657: static void
1.252 djm 658: do_convert_from_pkcs8(struct sshkey **k, int *private)
1.193 djm 659: {
660: EVP_PKEY *pubkey;
661: FILE *fp;
662:
663: if ((fp = fopen(identity_file, "r")) == NULL)
664: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
665: if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
666: fatal("%s: %s is not a recognised public key format", __func__,
667: identity_file);
668: }
669: fclose(fp);
1.321 djm 670: switch (EVP_PKEY_base_id(pubkey)) {
1.193 djm 671: case EVP_PKEY_RSA:
1.252 djm 672: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
673: fatal("sshkey_new failed");
1.193 djm 674: (*k)->type = KEY_RSA;
675: (*k)->rsa = EVP_PKEY_get1_RSA(pubkey);
676: break;
677: case EVP_PKEY_DSA:
1.252 djm 678: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
679: fatal("sshkey_new failed");
1.193 djm 680: (*k)->type = KEY_DSA;
681: (*k)->dsa = EVP_PKEY_get1_DSA(pubkey);
682: break;
1.200 djm 683: case EVP_PKEY_EC:
1.252 djm 684: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
685: fatal("sshkey_new failed");
1.200 djm 686: (*k)->type = KEY_ECDSA;
687: (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey);
1.252 djm 688: (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa);
1.200 djm 689: break;
1.193 djm 690: default:
691: fatal("%s: unsupported pubkey type %d", __func__,
1.321 djm 692: EVP_PKEY_base_id(pubkey));
1.193 djm 693: }
694: EVP_PKEY_free(pubkey);
695: return;
696: }
697:
698: static void
1.252 djm 699: do_convert_from_pem(struct sshkey **k, int *private)
1.193 djm 700: {
701: FILE *fp;
702: RSA *rsa;
703:
704: if ((fp = fopen(identity_file, "r")) == NULL)
705: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
706: if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) {
1.252 djm 707: if ((*k = sshkey_new(KEY_UNSPEC)) == NULL)
708: fatal("sshkey_new failed");
1.193 djm 709: (*k)->type = KEY_RSA;
710: (*k)->rsa = rsa;
711: fclose(fp);
712: return;
713: }
714: fatal("%s: unrecognised raw private key format", __func__);
715: }
716:
717: static void
718: do_convert_from(struct passwd *pw)
719: {
1.252 djm 720: struct sshkey *k = NULL;
721: int r, private = 0, ok = 0;
1.193 djm 722: struct stat st;
723:
724: if (!have_identity)
725: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 726: if (stat(identity_file, &st) == -1)
1.193 djm 727: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
728:
729: switch (convert_format) {
730: case FMT_RFC4716:
731: do_convert_from_ssh2(pw, &k, &private);
732: break;
733: case FMT_PKCS8:
734: do_convert_from_pkcs8(&k, &private);
735: break;
736: case FMT_PEM:
737: do_convert_from_pem(&k, &private);
738: break;
739: default:
740: fatal("%s: unknown key format %d", __func__, convert_format);
741: }
742:
1.260 djm 743: if (!private) {
1.252 djm 744: if ((r = sshkey_write(k, stdout)) == 0)
745: ok = 1;
1.193 djm 746: if (ok)
747: fprintf(stdout, "\n");
1.260 djm 748: } else {
1.193 djm 749: switch (k->type) {
750: case KEY_DSA:
751: ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL,
752: NULL, 0, NULL, NULL);
753: break;
1.200 djm 754: case KEY_ECDSA:
755: ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL,
756: NULL, 0, NULL, NULL);
757: break;
1.193 djm 758: case KEY_RSA:
759: ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL,
760: NULL, 0, NULL, NULL);
761: break;
762: default:
763: fatal("%s: unsupported key type %s", __func__,
1.252 djm 764: sshkey_type(k));
1.193 djm 765: }
766: }
767:
1.269 djm 768: if (!ok)
769: fatal("key write failed");
1.252 djm 770: sshkey_free(k);
1.19 markus 771: exit(0);
772: }
1.246 markus 773: #endif
1.19 markus 774:
1.63 itojun 775: static void
1.19 markus 776: do_print_public(struct passwd *pw)
777: {
1.252 djm 778: struct sshkey *prv;
1.19 markus 779: struct stat st;
1.252 djm 780: int r;
1.341 djm 781: char *comment = NULL;
1.19 markus 782:
783: if (!have_identity)
784: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 785: if (stat(identity_file, &st) == -1)
1.269 djm 786: fatal("%s: %s", identity_file, strerror(errno));
1.341 djm 787: prv = load_identity(identity_file, &comment);
1.252 djm 788: if ((r = sshkey_write(prv, stdout)) != 0)
1.304 markus 789: error("sshkey_write failed: %s", ssh_err(r));
1.252 djm 790: sshkey_free(prv);
1.341 djm 791: if (comment != NULL && *comment != '\0')
792: fprintf(stdout, " %s", comment);
1.19 markus 793: fprintf(stdout, "\n");
1.341 djm 794: free(comment);
1.19 markus 795: exit(0);
796: }
797:
1.66 markus 798: static void
1.197 djm 799: do_download(struct passwd *pw)
1.75 markus 800: {
1.177 markus 801: #ifdef ENABLE_PKCS11
1.252 djm 802: struct sshkey **keys = NULL;
1.177 markus 803: int i, nkeys;
1.252 djm 804: enum sshkey_fp_rep rep;
1.251 djm 805: int fptype;
1.221 djm 806: char *fp, *ra;
1.222 djm 807:
1.251 djm 808: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
809: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.75 markus 810:
1.327 benno 811: pkcs11_init(1);
1.177 markus 812: nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys);
813: if (nkeys <= 0)
814: fatal("cannot read public key from pkcs11");
815: for (i = 0; i < nkeys; i++) {
1.221 djm 816: if (print_fingerprint) {
1.252 djm 817: fp = sshkey_fingerprint(keys[i], fptype, rep);
818: ra = sshkey_fingerprint(keys[i], fingerprint_hash,
1.221 djm 819: SSH_FP_RANDOMART);
1.259 djm 820: if (fp == NULL || ra == NULL)
821: fatal("%s: sshkey_fingerprint fail", __func__);
1.252 djm 822: printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]),
823: fp, sshkey_type(keys[i]));
1.325 djm 824: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.221 djm 825: printf("%s\n", ra);
1.227 djm 826: free(ra);
827: free(fp);
1.221 djm 828: } else {
1.252 djm 829: (void) sshkey_write(keys[i], stdout); /* XXX check */
1.221 djm 830: fprintf(stdout, "\n");
831: }
1.252 djm 832: sshkey_free(keys[i]);
1.97 markus 833: }
1.227 djm 834: free(keys);
1.177 markus 835: pkcs11_terminate();
1.75 markus 836: exit(0);
1.177 markus 837: #else
838: fatal("no pkcs11 support");
839: #endif /* ENABLE_PKCS11 */
1.75 markus 840: }
1.66 markus 841:
1.279 djm 842: static struct sshkey *
843: try_read_key(char **cpp)
844: {
845: struct sshkey *ret;
846: int r;
847:
848: if ((ret = sshkey_new(KEY_UNSPEC)) == NULL)
849: fatal("sshkey_new failed");
850: if ((r = sshkey_read(ret, cpp)) == 0)
851: return ret;
852: /* Not a key */
853: sshkey_free(ret);
854: return NULL;
855: }
856:
1.63 itojun 857: static void
1.279 djm 858: fingerprint_one_key(const struct sshkey *public, const char *comment)
1.8 markus 859: {
1.279 djm 860: char *fp = NULL, *ra = NULL;
1.252 djm 861: enum sshkey_fp_rep rep;
1.251 djm 862: int fptype;
1.12 markus 863:
1.251 djm 864: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
865: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.279 djm 866: fp = sshkey_fingerprint(public, fptype, rep);
867: ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART);
868: if (fp == NULL || ra == NULL)
869: fatal("%s: sshkey_fingerprint failed", __func__);
1.294 djm 870: mprintf("%u %s %s (%s)\n", sshkey_size(public), fp,
1.279 djm 871: comment ? comment : "no comment", sshkey_type(public));
1.325 djm 872: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1.279 djm 873: printf("%s\n", ra);
874: free(ra);
875: free(fp);
876: }
877:
878: static void
879: fingerprint_private(const char *path)
880: {
881: struct stat st;
882: char *comment = NULL;
883: struct sshkey *public = NULL;
884: int r;
885:
1.333 deraadt 886: if (stat(identity_file, &st) == -1)
1.279 djm 887: fatal("%s: %s", path, strerror(errno));
1.280 djm 888: if ((r = sshkey_load_public(path, &public, &comment)) != 0) {
889: debug("load public \"%s\": %s", path, ssh_err(r));
890: if ((r = sshkey_load_private(path, NULL,
891: &public, &comment)) != 0) {
892: debug("load private \"%s\": %s", path, ssh_err(r));
893: fatal("%s is not a key file.", path);
894: }
895: }
896:
1.279 djm 897: fingerprint_one_key(public, comment);
898: sshkey_free(public);
899: free(comment);
900: }
901:
902: static void
903: do_fingerprint(struct passwd *pw)
904: {
905: FILE *f;
906: struct sshkey *public = NULL;
1.317 markus 907: char *comment = NULL, *cp, *ep, *line = NULL;
908: size_t linesize = 0;
1.279 djm 909: int i, invalid = 1;
910: const char *path;
1.289 djm 911: u_long lnum = 0;
1.279 djm 912:
1.12 markus 913: if (!have_identity)
914: ask_filename(pw, "Enter file in which the key is");
1.279 djm 915: path = identity_file;
1.15 markus 916:
1.279 djm 917: if (strcmp(identity_file, "-") == 0) {
918: f = stdin;
919: path = "(stdin)";
920: } else if ((f = fopen(path, "r")) == NULL)
921: fatal("%s: %s: %s", __progname, path, strerror(errno));
922:
1.317 markus 923: while (getline(&line, &linesize, f) != -1) {
924: lnum++;
1.279 djm 925: cp = line;
926: cp[strcspn(cp, "\n")] = '\0';
927: /* Trim leading space and comments */
928: cp = line + strspn(line, " \t");
929: if (*cp == '#' || *cp == '\0')
930: continue;
1.191 djm 931:
1.279 djm 932: /*
933: * Input may be plain keys, private keys, authorized_keys
934: * or known_hosts.
935: */
936:
937: /*
938: * Try private keys first. Assume a key is private if
939: * "SSH PRIVATE KEY" appears on the first line and we're
940: * not reading from stdin (XXX support private keys on stdin).
941: */
942: if (lnum == 1 && strcmp(identity_file, "-") != 0 &&
1.280 djm 943: strstr(cp, "PRIVATE KEY") != NULL) {
1.317 markus 944: free(line);
1.279 djm 945: fclose(f);
946: fingerprint_private(path);
947: exit(0);
948: }
949:
950: /*
951: * If it's not a private key, then this must be prepared to
952: * accept a public key prefixed with a hostname or options.
953: * Try a bare key first, otherwise skip the leading stuff.
954: */
955: if ((public = try_read_key(&cp)) == NULL) {
956: i = strtol(cp, &ep, 10);
957: if (i == 0 || ep == NULL ||
958: (*ep != ' ' && *ep != '\t')) {
959: int quoted = 0;
960:
961: comment = cp;
962: for (; *cp && (quoted || (*cp != ' ' &&
963: *cp != '\t')); cp++) {
964: if (*cp == '\\' && cp[1] == '"')
965: cp++; /* Skip both */
966: else if (*cp == '"')
967: quoted = !quoted;
968: }
969: if (!*cp)
970: continue;
971: *cp++ = '\0';
972: }
1.191 djm 973: }
1.279 djm 974: /* Retry after parsing leading hostname/key options */
975: if (public == NULL && (public = try_read_key(&cp)) == NULL) {
1.289 djm 976: debug("%s:%lu: not a public key", path, lnum);
1.191 djm 977: continue;
978: }
979:
1.279 djm 980: /* Find trailing comment, if any */
981: for (; *cp == ' ' || *cp == '\t'; cp++)
1.191 djm 982: ;
1.279 djm 983: if (*cp != '\0' && *cp != '#')
1.191 djm 984: comment = cp;
1.279 djm 985:
986: fingerprint_one_key(public, comment);
1.252 djm 987: sshkey_free(public);
1.279 djm 988: invalid = 0; /* One good key in the file is sufficient */
1.15 markus 989: }
1.191 djm 990: fclose(f);
1.317 markus 991: free(line);
1.191 djm 992:
1.269 djm 993: if (invalid)
1.279 djm 994: fatal("%s is not a public key file.", path);
1.12 markus 995: exit(0);
1.8 markus 996: }
997:
1.119 djm 998: static void
1.206 stevesk 999: do_gen_all_hostkeys(struct passwd *pw)
1000: {
1001: struct {
1002: char *key_type;
1003: char *key_type_display;
1004: char *path;
1005: } key_types[] = {
1.267 djm 1006: #ifdef WITH_OPENSSL
1.206 stevesk 1007: { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE },
1008: { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE },
1009: { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE },
1.267 djm 1010: #endif /* WITH_OPENSSL */
1.238 markus 1011: { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE },
1.313 markus 1012: #ifdef WITH_XMSS
1013: { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE },
1014: #endif /* WITH_XMSS */
1.206 stevesk 1015: { NULL, NULL, NULL }
1016: };
1017:
1.340 dtucker 1018: u_int32_t bits = 0;
1.206 stevesk 1019: int first = 0;
1020: struct stat st;
1.252 djm 1021: struct sshkey *private, *public;
1.307 djm 1022: char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file;
1.252 djm 1023: int i, type, fd, r;
1.206 stevesk 1024: FILE *f;
1025:
1026: for (i = 0; key_types[i].key_type; i++) {
1.307 djm 1027: public = private = NULL;
1028: prv_tmp = pub_tmp = prv_file = pub_file = NULL;
1029:
1030: xasprintf(&prv_file, "%s%s",
1031: identity_file, key_types[i].path);
1032:
1033: /* Check whether private key exists and is not zero-length */
1034: if (stat(prv_file, &st) == 0) {
1035: if (st.st_size != 0)
1036: goto next;
1037: } else if (errno != ENOENT) {
1.269 djm 1038: error("Could not stat %s: %s", key_types[i].path,
1.206 stevesk 1039: strerror(errno));
1.307 djm 1040: goto failnext;
1.206 stevesk 1041: }
1042:
1.307 djm 1043: /*
1044: * Private key doesn't exist or is invalid; proceed with
1045: * key generation.
1046: */
1047: xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX",
1048: identity_file, key_types[i].path);
1049: xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX",
1050: identity_file, key_types[i].path);
1051: xasprintf(&pub_file, "%s%s.pub",
1052: identity_file, key_types[i].path);
1053:
1.206 stevesk 1054: if (first == 0) {
1055: first = 1;
1056: printf("%s: generating new host keys: ", __progname);
1057: }
1058: printf("%s ", key_types[i].key_type_display);
1059: fflush(stdout);
1.252 djm 1060: type = sshkey_type_from_name(key_types[i].key_type);
1.307 djm 1061: if ((fd = mkstemp(prv_tmp)) == -1) {
1062: error("Could not save your public key in %s: %s",
1063: prv_tmp, strerror(errno));
1064: goto failnext;
1065: }
1066: close(fd); /* just using mkstemp() to generate/reserve a name */
1.206 stevesk 1067: bits = 0;
1.255 djm 1068: type_bits_valid(type, NULL, &bits);
1.252 djm 1069: if ((r = sshkey_generate(type, bits, &private)) != 0) {
1.304 markus 1070: error("sshkey_generate failed: %s", ssh_err(r));
1.307 djm 1071: goto failnext;
1.206 stevesk 1072: }
1.252 djm 1073: if ((r = sshkey_from_private(private, &public)) != 0)
1074: fatal("sshkey_from_private failed: %s", ssh_err(r));
1.206 stevesk 1075: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name,
1076: hostname);
1.307 djm 1077: if ((r = sshkey_save_private(private, prv_tmp, "",
1.336 djm 1078: comment, private_key_format, openssh_format_cipher,
1079: rounds)) != 0) {
1.269 djm 1080: error("Saving key \"%s\" failed: %s",
1.307 djm 1081: prv_tmp, ssh_err(r));
1082: goto failnext;
1.206 stevesk 1083: }
1.307 djm 1084: if ((fd = mkstemp(pub_tmp)) == -1) {
1085: error("Could not save your public key in %s: %s",
1086: pub_tmp, strerror(errno));
1087: goto failnext;
1.206 stevesk 1088: }
1.307 djm 1089: (void)fchmod(fd, 0644);
1.206 stevesk 1090: f = fdopen(fd, "w");
1091: if (f == NULL) {
1.307 djm 1092: error("fdopen %s failed: %s", pub_tmp, strerror(errno));
1.250 doug 1093: close(fd);
1.307 djm 1094: goto failnext;
1.206 stevesk 1095: }
1.254 djm 1096: if ((r = sshkey_write(public, f)) != 0) {
1.269 djm 1097: error("write key failed: %s", ssh_err(r));
1.250 doug 1098: fclose(f);
1.307 djm 1099: goto failnext;
1100: }
1101: fprintf(f, " %s\n", comment);
1102: if (ferror(f) != 0) {
1103: error("write key failed: %s", strerror(errno));
1104: fclose(f);
1105: goto failnext;
1106: }
1107: if (fclose(f) != 0) {
1108: error("key close failed: %s", strerror(errno));
1109: goto failnext;
1110: }
1111:
1112: /* Rename temporary files to their permanent locations. */
1113: if (rename(pub_tmp, pub_file) != 0) {
1114: error("Unable to move %s into position: %s",
1115: pub_file, strerror(errno));
1116: goto failnext;
1117: }
1118: if (rename(prv_tmp, prv_file) != 0) {
1119: error("Unable to move %s into position: %s",
1120: key_types[i].path, strerror(errno));
1121: failnext:
1.206 stevesk 1122: first = 0;
1.307 djm 1123: goto next;
1.206 stevesk 1124: }
1.307 djm 1125: next:
1126: sshkey_free(private);
1.252 djm 1127: sshkey_free(public);
1.307 djm 1128: free(prv_tmp);
1129: free(pub_tmp);
1130: free(prv_file);
1131: free(pub_file);
1.206 stevesk 1132: }
1133: if (first != 0)
1134: printf("\n");
1135: }
1136:
1.256 djm 1137: struct known_hosts_ctx {
1.257 djm 1138: const char *host; /* Hostname searched for in find/delete case */
1139: FILE *out; /* Output file, stdout for find_hosts case */
1140: int has_unhashed; /* When hashing, original had unhashed hosts */
1141: int found_key; /* For find/delete, host was found */
1142: int invalid; /* File contained invalid items; don't delete */
1.325 djm 1143: int hash_hosts; /* Hash hostnames as we go */
1144: int find_host; /* Search for specific hostname */
1145: int delete_host; /* Delete host from known_hosts */
1.256 djm 1146: };
1147:
1148: static int
1149: known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx)
1.119 djm 1150: {
1.256 djm 1151: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1152: char *hashed, *cp, *hosts, *ohosts;
1153: int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts);
1.298 dtucker 1154: int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM;
1.256 djm 1155:
1.262 djm 1156: switch (l->status) {
1157: case HKF_STATUS_OK:
1158: case HKF_STATUS_MATCHED:
1159: /*
1160: * Don't hash hosts already already hashed, with wildcard
1161: * characters or a CA/revocation marker.
1162: */
1.296 djm 1163: if (was_hashed || has_wild || l->marker != MRK_NONE) {
1.262 djm 1164: fprintf(ctx->out, "%s\n", l->line);
1.325 djm 1165: if (has_wild && !ctx->find_host) {
1.297 dtucker 1166: logit("%s:%lu: ignoring host name "
1.269 djm 1167: "with wildcard: %.64s", l->path,
1.262 djm 1168: l->linenum, l->hosts);
1169: }
1170: return 0;
1171: }
1172: /*
1173: * Split any comma-separated hostnames from the host list,
1174: * hash and store separately.
1175: */
1176: ohosts = hosts = xstrdup(l->hosts);
1177: while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') {
1.299 djm 1178: lowercase(cp);
1.262 djm 1179: if ((hashed = host_hash(cp, NULL, 0)) == NULL)
1180: fatal("hash_host failed");
1181: fprintf(ctx->out, "%s %s\n", hashed, l->rawkey);
1182: ctx->has_unhashed = 1;
1183: }
1184: free(ohosts);
1185: return 0;
1186: case HKF_STATUS_INVALID:
1187: /* Retain invalid lines, but mark file as invalid. */
1.256 djm 1188: ctx->invalid = 1;
1.297 dtucker 1189: logit("%s:%lu: invalid line", l->path, l->linenum);
1.262 djm 1190: /* FALLTHROUGH */
1191: default:
1.256 djm 1192: fprintf(ctx->out, "%s\n", l->line);
1193: return 0;
1194: }
1.262 djm 1195: /* NOTREACHED */
1196: return -1;
1.256 djm 1197: }
1198:
1199: static int
1200: known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx)
1201: {
1202: struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx;
1.272 djm 1203: enum sshkey_fp_rep rep;
1204: int fptype;
1.338 djm 1205: char *fp = NULL, *ra = NULL;
1.272 djm 1206:
1207: fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash;
1208: rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT;
1.256 djm 1209:
1.262 djm 1210: if (l->status == HKF_STATUS_MATCHED) {
1.325 djm 1211: if (ctx->delete_host) {
1.256 djm 1212: if (l->marker != MRK_NONE) {
1213: /* Don't remove CA and revocation lines */
1214: fprintf(ctx->out, "%s\n", l->line);
1215: } else {
1216: /*
1217: * Hostname matches and has no CA/revoke
1218: * marker, delete it by *not* writing the
1219: * line to ctx->out.
1220: */
1221: ctx->found_key = 1;
1222: if (!quiet)
1.297 dtucker 1223: printf("# Host %s found: line %lu\n",
1.256 djm 1224: ctx->host, l->linenum);
1225: }
1226: return 0;
1.325 djm 1227: } else if (ctx->find_host) {
1.256 djm 1228: ctx->found_key = 1;
1229: if (!quiet) {
1.297 dtucker 1230: printf("# Host %s found: line %lu %s\n",
1.256 djm 1231: ctx->host,
1232: l->linenum, l->marker == MRK_CA ? "CA" :
1233: (l->marker == MRK_REVOKE ? "REVOKED" : ""));
1234: }
1.325 djm 1235: if (ctx->hash_hosts)
1.256 djm 1236: known_hosts_hash(l, ctx);
1.272 djm 1237: else if (print_fingerprint) {
1238: fp = sshkey_fingerprint(l->key, fptype, rep);
1.338 djm 1239: ra = sshkey_fingerprint(l->key,
1240: fingerprint_hash, SSH_FP_RANDOMART);
1241: if (fp == NULL || ra == NULL)
1242: fatal("%s: sshkey_fingerprint failed",
1243: __func__);
1.385 claudio 1244: mprintf("%s %s %s%s%s\n", ctx->host,
1245: sshkey_type(l->key), fp,
1246: l->comment[0] ? " " : "",
1247: l->comment);
1.338 djm 1248: if (log_level_get() >= SYSLOG_LEVEL_VERBOSE)
1249: printf("%s\n", ra);
1250: free(ra);
1.272 djm 1251: free(fp);
1252: } else
1.256 djm 1253: fprintf(ctx->out, "%s\n", l->line);
1254: return 0;
1255: }
1.325 djm 1256: } else if (ctx->delete_host) {
1.256 djm 1257: /* Retain non-matching hosts when deleting */
1258: if (l->status == HKF_STATUS_INVALID) {
1259: ctx->invalid = 1;
1.297 dtucker 1260: logit("%s:%lu: invalid line", l->path, l->linenum);
1.256 djm 1261: }
1262: fprintf(ctx->out, "%s\n", l->line);
1.166 djm 1263: }
1.256 djm 1264: return 0;
1.119 djm 1265: }
1266:
1267: static void
1.325 djm 1268: do_known_hosts(struct passwd *pw, const char *name, int find_host,
1269: int delete_host, int hash_hosts)
1.119 djm 1270: {
1.258 deraadt 1271: char *cp, tmp[PATH_MAX], old[PATH_MAX];
1.257 djm 1272: int r, fd, oerrno, inplace = 0;
1.256 djm 1273: struct known_hosts_ctx ctx;
1.272 djm 1274: u_int foreach_options;
1.119 djm 1275:
1276: if (!have_identity) {
1277: cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid);
1278: if (strlcpy(identity_file, cp, sizeof(identity_file)) >=
1279: sizeof(identity_file))
1280: fatal("Specified known hosts path too long");
1.227 djm 1281: free(cp);
1.119 djm 1282: have_identity = 1;
1283: }
1284:
1.256 djm 1285: memset(&ctx, 0, sizeof(ctx));
1286: ctx.out = stdout;
1287: ctx.host = name;
1.325 djm 1288: ctx.hash_hosts = hash_hosts;
1289: ctx.find_host = find_host;
1290: ctx.delete_host = delete_host;
1.256 djm 1291:
1.119 djm 1292: /*
1293: * Find hosts goes to stdout, hash and deletions happen in-place
1294: * A corner case is ssh-keygen -HF foo, which should go to stdout
1295: */
1296: if (!find_host && (hash_hosts || delete_host)) {
1297: if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) ||
1298: strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) ||
1299: strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) ||
1300: strlcat(old, ".old", sizeof(old)) >= sizeof(old))
1301: fatal("known_hosts path too long");
1302: umask(077);
1.256 djm 1303: if ((fd = mkstemp(tmp)) == -1)
1.119 djm 1304: fatal("mkstemp: %s", strerror(errno));
1.256 djm 1305: if ((ctx.out = fdopen(fd, "w")) == NULL) {
1306: oerrno = errno;
1.119 djm 1307: unlink(tmp);
1.256 djm 1308: fatal("fdopen: %s", strerror(oerrno));
1.119 djm 1309: }
1.257 djm 1310: inplace = 1;
1.119 djm 1311: }
1.256 djm 1312: /* XXX support identity_file == "-" for stdin */
1.272 djm 1313: foreach_options = find_host ? HKF_WANT_MATCH : 0;
1314: foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0;
1.316 djm 1315: if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ?
1.315 djm 1316: known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL,
1317: foreach_options)) != 0) {
1.284 deraadt 1318: if (inplace)
1319: unlink(tmp);
1.256 djm 1320: fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r));
1.284 deraadt 1321: }
1.119 djm 1322:
1.257 djm 1323: if (inplace)
1.256 djm 1324: fclose(ctx.out);
1.119 djm 1325:
1.256 djm 1326: if (ctx.invalid) {
1.269 djm 1327: error("%s is not a valid known_hosts file.", identity_file);
1.257 djm 1328: if (inplace) {
1.269 djm 1329: error("Not replacing existing known_hosts "
1330: "file because of errors");
1.119 djm 1331: unlink(tmp);
1332: }
1333: exit(1);
1.256 djm 1334: } else if (delete_host && !ctx.found_key) {
1.269 djm 1335: logit("Host %s not found in %s", name, identity_file);
1.277 djm 1336: if (inplace)
1337: unlink(tmp);
1.257 djm 1338: } else if (inplace) {
1.119 djm 1339: /* Backup existing file */
1340: if (unlink(old) == -1 && errno != ENOENT)
1341: fatal("unlink %.100s: %s", old, strerror(errno));
1342: if (link(identity_file, old) == -1)
1343: fatal("link %.100s to %.100s: %s", identity_file, old,
1344: strerror(errno));
1345: /* Move new one into place */
1346: if (rename(tmp, identity_file) == -1) {
1347: error("rename\"%s\" to \"%s\": %s", tmp, identity_file,
1348: strerror(errno));
1349: unlink(tmp);
1350: unlink(old);
1351: exit(1);
1352: }
1353:
1.269 djm 1354: printf("%s updated.\n", identity_file);
1355: printf("Original contents retained as %s\n", old);
1.256 djm 1356: if (ctx.has_unhashed) {
1.269 djm 1357: logit("WARNING: %s contains unhashed entries", old);
1358: logit("Delete this file to ensure privacy "
1359: "of hostnames");
1.119 djm 1360: }
1361: }
1362:
1.256 djm 1363: exit (find_host && !ctx.found_key);
1.119 djm 1364: }
1365:
1.13 deraadt 1366: /*
1367: * Perform changing a passphrase. The argument is the passwd structure
1368: * for the current user.
1369: */
1.63 itojun 1370: static void
1.7 markus 1371: do_change_passphrase(struct passwd *pw)
1372: {
1.12 markus 1373: char *comment;
1374: char *old_passphrase, *passphrase1, *passphrase2;
1375: struct stat st;
1.252 djm 1376: struct sshkey *private;
1377: int r;
1.12 markus 1378:
1379: if (!have_identity)
1380: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1381: if (stat(identity_file, &st) == -1)
1.269 djm 1382: fatal("%s: %s", identity_file, strerror(errno));
1.12 markus 1383: /* Try to load the file with empty passphrase. */
1.252 djm 1384: r = sshkey_load_private(identity_file, "", &private, &comment);
1385: if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.12 markus 1386: if (identity_passphrase)
1387: old_passphrase = xstrdup(identity_passphrase);
1388: else
1.65 markus 1389: old_passphrase =
1390: read_passphrase("Enter old passphrase: ",
1391: RP_ALLOW_STDIN);
1.252 djm 1392: r = sshkey_load_private(identity_file, old_passphrase,
1393: &private, &comment);
1.240 djm 1394: explicit_bzero(old_passphrase, strlen(old_passphrase));
1.227 djm 1395: free(old_passphrase);
1.252 djm 1396: if (r != 0)
1397: goto badkey;
1398: } else if (r != 0) {
1399: badkey:
1.269 djm 1400: fatal("Failed to load key %s: %s", identity_file, ssh_err(r));
1.12 markus 1401: }
1.266 djm 1402: if (comment)
1.294 djm 1403: mprintf("Key has comment '%s'\n", comment);
1.12 markus 1404:
1405: /* Ask the new passphrase (twice). */
1406: if (identity_new_passphrase) {
1407: passphrase1 = xstrdup(identity_new_passphrase);
1408: passphrase2 = NULL;
1409: } else {
1410: passphrase1 =
1.65 markus 1411: read_passphrase("Enter new passphrase (empty for no "
1412: "passphrase): ", RP_ALLOW_STDIN);
1413: passphrase2 = read_passphrase("Enter same passphrase again: ",
1.86 deraadt 1414: RP_ALLOW_STDIN);
1.12 markus 1415:
1416: /* Verify that they are the same. */
1417: if (strcmp(passphrase1, passphrase2) != 0) {
1.240 djm 1418: explicit_bzero(passphrase1, strlen(passphrase1));
1419: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1420: free(passphrase1);
1421: free(passphrase2);
1.12 markus 1422: printf("Pass phrases do not match. Try again.\n");
1423: exit(1);
1424: }
1425: /* Destroy the other copy. */
1.240 djm 1426: explicit_bzero(passphrase2, strlen(passphrase2));
1.227 djm 1427: free(passphrase2);
1.12 markus 1428: }
1429:
1430: /* Save the file using the new passphrase. */
1.252 djm 1431: if ((r = sshkey_save_private(private, identity_file, passphrase1,
1.336 djm 1432: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.269 djm 1433: error("Saving key \"%s\" failed: %s.",
1.252 djm 1434: identity_file, ssh_err(r));
1.240 djm 1435: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 1436: free(passphrase1);
1.252 djm 1437: sshkey_free(private);
1.227 djm 1438: free(comment);
1.12 markus 1439: exit(1);
1440: }
1441: /* Destroy the passphrase and the copy of the key in memory. */
1.240 djm 1442: explicit_bzero(passphrase1, strlen(passphrase1));
1.227 djm 1443: free(passphrase1);
1.252 djm 1444: sshkey_free(private); /* Destroys contents */
1.227 djm 1445: free(comment);
1.1 deraadt 1446:
1.12 markus 1447: printf("Your identification has been saved with the new passphrase.\n");
1448: exit(0);
1.1 deraadt 1449: }
1450:
1.105 jakob 1451: /*
1452: * Print the SSHFP RR.
1453: */
1.138 jakob 1454: static int
1.325 djm 1455: do_print_resource_record(struct passwd *pw, char *fname, char *hname,
1456: int print_generic)
1.105 jakob 1457: {
1.252 djm 1458: struct sshkey *public;
1.105 jakob 1459: char *comment = NULL;
1460: struct stat st;
1.252 djm 1461: int r;
1.105 jakob 1462:
1.138 jakob 1463: if (fname == NULL)
1.229 djm 1464: fatal("%s: no filename", __func__);
1.333 deraadt 1465: if (stat(fname, &st) == -1) {
1.138 jakob 1466: if (errno == ENOENT)
1467: return 0;
1.269 djm 1468: fatal("%s: %s", fname, strerror(errno));
1.105 jakob 1469: }
1.269 djm 1470: if ((r = sshkey_load_public(fname, &public, &comment)) != 0)
1471: fatal("Failed to read v2 public key from \"%s\": %s.",
1.252 djm 1472: fname, ssh_err(r));
1473: export_dns_rr(hname, public, stdout, print_generic);
1474: sshkey_free(public);
1475: free(comment);
1476: return 1;
1.105 jakob 1477: }
1478:
1.13 deraadt 1479: /*
1480: * Change the comment of a private key file.
1481: */
1.63 itojun 1482: static void
1.325 djm 1483: do_change_comment(struct passwd *pw, const char *identity_comment)
1.1 deraadt 1484: {
1.46 deraadt 1485: char new_comment[1024], *comment, *passphrase;
1.252 djm 1486: struct sshkey *private;
1487: struct sshkey *public;
1.12 markus 1488: struct stat st;
1489: FILE *f;
1.252 djm 1490: int r, fd;
1.12 markus 1491:
1492: if (!have_identity)
1493: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 1494: if (stat(identity_file, &st) == -1)
1.269 djm 1495: fatal("%s: %s", identity_file, strerror(errno));
1.252 djm 1496: if ((r = sshkey_load_private(identity_file, "",
1497: &private, &comment)) == 0)
1498: passphrase = xstrdup("");
1.269 djm 1499: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
1500: fatal("Cannot load private key \"%s\": %s.",
1.252 djm 1501: identity_file, ssh_err(r));
1.269 djm 1502: else {
1.12 markus 1503: if (identity_passphrase)
1504: passphrase = xstrdup(identity_passphrase);
1505: else if (identity_new_passphrase)
1506: passphrase = xstrdup(identity_new_passphrase);
1507: else
1.65 markus 1508: passphrase = read_passphrase("Enter passphrase: ",
1509: RP_ALLOW_STDIN);
1.12 markus 1510: /* Try to load using the passphrase. */
1.252 djm 1511: if ((r = sshkey_load_private(identity_file, passphrase,
1512: &private, &comment)) != 0) {
1.240 djm 1513: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1514: free(passphrase);
1.269 djm 1515: fatal("Cannot load private key \"%s\": %s.",
1.252 djm 1516: identity_file, ssh_err(r));
1.12 markus 1517: }
1518: }
1.283 halex 1519:
1.313 markus 1520: if (private->type != KEY_ED25519 && private->type != KEY_XMSS &&
1.336 djm 1521: private_key_format != SSHKEY_PRIVATE_OPENSSH) {
1.302 djm 1522: error("Comments are only supported for keys stored in "
1.283 halex 1523: "the new format (-o).");
1.268 tobias 1524: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1525: sshkey_free(private);
1.52 markus 1526: exit(1);
1.86 deraadt 1527: }
1.293 millert 1528: if (comment)
1.330 lum 1529: printf("Old comment: %s\n", comment);
1.293 millert 1530: else
1.330 lum 1531: printf("No existing comment\n");
1.12 markus 1532:
1533: if (identity_comment) {
1534: strlcpy(new_comment, identity_comment, sizeof(new_comment));
1535: } else {
1.330 lum 1536: printf("New comment: ");
1.12 markus 1537: fflush(stdout);
1538: if (!fgets(new_comment, sizeof(new_comment), stdin)) {
1.240 djm 1539: explicit_bzero(passphrase, strlen(passphrase));
1.252 djm 1540: sshkey_free(private);
1.12 markus 1541: exit(1);
1542: }
1.162 gilles 1543: new_comment[strcspn(new_comment, "\n")] = '\0';
1.12 markus 1544: }
1.330 lum 1545: if (comment != NULL && strcmp(comment, new_comment) == 0) {
1546: printf("No change to comment\n");
1547: free(passphrase);
1548: sshkey_free(private);
1549: free(comment);
1550: exit(0);
1551: }
1.12 markus 1552:
1553: /* Save the file using the new passphrase. */
1.252 djm 1554: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 1555: new_comment, private_key_format, openssh_format_cipher,
1556: rounds)) != 0) {
1.269 djm 1557: error("Saving key \"%s\" failed: %s",
1.252 djm 1558: identity_file, ssh_err(r));
1.240 djm 1559: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1560: free(passphrase);
1.252 djm 1561: sshkey_free(private);
1.227 djm 1562: free(comment);
1.12 markus 1563: exit(1);
1564: }
1.240 djm 1565: explicit_bzero(passphrase, strlen(passphrase));
1.227 djm 1566: free(passphrase);
1.252 djm 1567: if ((r = sshkey_from_private(private, &public)) != 0)
1.304 markus 1568: fatal("sshkey_from_private failed: %s", ssh_err(r));
1.252 djm 1569: sshkey_free(private);
1.12 markus 1570:
1571: strlcat(identity_file, ".pub", sizeof(identity_file));
1.46 deraadt 1572: fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1.269 djm 1573: if (fd == -1)
1574: fatal("Could not save your public key in %s", identity_file);
1.46 deraadt 1575: f = fdopen(fd, "w");
1.269 djm 1576: if (f == NULL)
1577: fatal("fdopen %s failed: %s", identity_file, strerror(errno));
1.252 djm 1578: if ((r = sshkey_write(public, f)) != 0)
1.269 djm 1579: fatal("write key failed: %s", ssh_err(r));
1.252 djm 1580: sshkey_free(public);
1.19 markus 1581: fprintf(f, " %s\n", new_comment);
1.12 markus 1582: fclose(f);
1.1 deraadt 1583:
1.227 djm 1584: free(comment);
1.1 deraadt 1585:
1.330 lum 1586: if (strlen(new_comment) > 0)
1587: printf("Comment '%s' applied\n", new_comment);
1588: else
1589: printf("Comment removed\n");
1590:
1.12 markus 1591: exit(0);
1.1 deraadt 1592: }
1593:
1.179 djm 1594: static void
1.252 djm 1595: add_flag_option(struct sshbuf *c, const char *name)
1.179 djm 1596: {
1.252 djm 1597: int r;
1598:
1.179 djm 1599: debug3("%s: %s", __func__, name);
1.252 djm 1600: if ((r = sshbuf_put_cstring(c, name)) != 0 ||
1601: (r = sshbuf_put_string(c, NULL, 0)) != 0)
1602: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.179 djm 1603: }
1604:
1605: static void
1.252 djm 1606: add_string_option(struct sshbuf *c, const char *name, const char *value)
1.179 djm 1607: {
1.252 djm 1608: struct sshbuf *b;
1609: int r;
1.179 djm 1610:
1611: debug3("%s: %s=%s", __func__, name, value);
1.252 djm 1612: if ((b = sshbuf_new()) == NULL)
1613: fatal("%s: sshbuf_new failed", __func__);
1614: if ((r = sshbuf_put_cstring(b, value)) != 0 ||
1615: (r = sshbuf_put_cstring(c, name)) != 0 ||
1616: (r = sshbuf_put_stringb(c, b)) != 0)
1617: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.179 djm 1618:
1.252 djm 1619: sshbuf_free(b);
1.179 djm 1620: }
1621:
1.190 djm 1622: #define OPTIONS_CRITICAL 1
1623: #define OPTIONS_EXTENSIONS 2
1.179 djm 1624: static void
1.252 djm 1625: prepare_options_buf(struct sshbuf *c, int which)
1.179 djm 1626: {
1.300 djm 1627: size_t i;
1628:
1.252 djm 1629: sshbuf_reset(c);
1.196 djm 1630: if ((which & OPTIONS_CRITICAL) != 0 &&
1631: certflags_command != NULL)
1632: add_string_option(c, "force-command", certflags_command);
1.190 djm 1633: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1.210 djm 1634: (certflags_flags & CERTOPT_X_FWD) != 0)
1635: add_flag_option(c, "permit-X11-forwarding");
1636: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1.190 djm 1637: (certflags_flags & CERTOPT_AGENT_FWD) != 0)
1.186 djm 1638: add_flag_option(c, "permit-agent-forwarding");
1.190 djm 1639: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1640: (certflags_flags & CERTOPT_PORT_FWD) != 0)
1.186 djm 1641: add_flag_option(c, "permit-port-forwarding");
1.190 djm 1642: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1643: (certflags_flags & CERTOPT_PTY) != 0)
1.186 djm 1644: add_flag_option(c, "permit-pty");
1.190 djm 1645: if ((which & OPTIONS_EXTENSIONS) != 0 &&
1646: (certflags_flags & CERTOPT_USER_RC) != 0)
1.186 djm 1647: add_flag_option(c, "permit-user-rc");
1.190 djm 1648: if ((which & OPTIONS_CRITICAL) != 0 &&
1.371 djm 1649: (certflags_flags & CERTOPT_NO_REQUIRE_USER_PRESENCE) != 0)
1650: add_flag_option(c, "no-touch-required");
1651: if ((which & OPTIONS_CRITICAL) != 0 &&
1.190 djm 1652: certflags_src_addr != NULL)
1653: add_string_option(c, "source-address", certflags_src_addr);
1.300 djm 1654: for (i = 0; i < ncert_userext; i++) {
1655: if ((cert_userext[i].crit && (which & OPTIONS_EXTENSIONS)) ||
1656: (!cert_userext[i].crit && (which & OPTIONS_CRITICAL)))
1657: continue;
1658: if (cert_userext[i].val == NULL)
1659: add_flag_option(c, cert_userext[i].key);
1660: else {
1661: add_string_option(c, cert_userext[i].key,
1662: cert_userext[i].val);
1663: }
1664: }
1.179 djm 1665: }
1666:
1.252 djm 1667: static struct sshkey *
1.197 djm 1668: load_pkcs11_key(char *path)
1669: {
1670: #ifdef ENABLE_PKCS11
1.252 djm 1671: struct sshkey **keys = NULL, *public, *private = NULL;
1672: int r, i, nkeys;
1.197 djm 1673:
1.252 djm 1674: if ((r = sshkey_load_public(path, &public, NULL)) != 0)
1675: fatal("Couldn't load CA public key \"%s\": %s",
1676: path, ssh_err(r));
1.197 djm 1677:
1678: nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys);
1679: debug3("%s: %d keys", __func__, nkeys);
1680: if (nkeys <= 0)
1681: fatal("cannot read public key from pkcs11");
1682: for (i = 0; i < nkeys; i++) {
1.252 djm 1683: if (sshkey_equal_public(public, keys[i])) {
1.197 djm 1684: private = keys[i];
1685: continue;
1686: }
1.252 djm 1687: sshkey_free(keys[i]);
1.197 djm 1688: }
1.227 djm 1689: free(keys);
1.252 djm 1690: sshkey_free(public);
1.197 djm 1691: return private;
1692: #else
1693: fatal("no pkcs11 support");
1694: #endif /* ENABLE_PKCS11 */
1695: }
1696:
1.305 djm 1697: /* Signer for sshkey_certify_custom that uses the agent */
1698: static int
1.332 djm 1699: agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp,
1.305 djm 1700: const u_char *data, size_t datalen,
1.359 djm 1701: const char *alg, const char *provider, u_int compat, void *ctx)
1.305 djm 1702: {
1703: int *agent_fdp = (int *)ctx;
1704:
1705: return ssh_agent_sign(*agent_fdp, key, sigp, lenp,
1706: data, datalen, alg, compat);
1707: }
1708:
1.179 djm 1709: static void
1.325 djm 1710: do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent,
1.326 djm 1711: unsigned long long cert_serial, int cert_serial_autoinc,
1712: int argc, char **argv)
1.179 djm 1713: {
1.305 djm 1714: int r, i, fd, found, agent_fd = -1;
1.179 djm 1715: u_int n;
1.252 djm 1716: struct sshkey *ca, *public;
1.374 djm 1717: char valid[64], *otmp, *tmp, *cp, *out, *comment;
1718: char *ca_fp = NULL, **plist = NULL;
1.179 djm 1719: FILE *f;
1.305 djm 1720: struct ssh_identitylist *agent_ids;
1721: size_t j;
1.374 djm 1722: struct notifier_ctx *notifier = NULL;
1.186 djm 1723:
1.246 markus 1724: #ifdef ENABLE_PKCS11
1.197 djm 1725: pkcs11_init(1);
1.246 markus 1726: #endif
1.197 djm 1727: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
1728: if (pkcs11provider != NULL) {
1.305 djm 1729: /* If a PKCS#11 token was specified then try to use it */
1.197 djm 1730: if ((ca = load_pkcs11_key(tmp)) == NULL)
1731: fatal("No PKCS#11 key matching %s found", ca_key_path);
1.305 djm 1732: } else if (prefer_agent) {
1733: /*
1734: * Agent signature requested. Try to use agent after making
1735: * sure the public key specified is actually present in the
1736: * agent.
1737: */
1738: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
1739: fatal("Cannot load CA public key %s: %s",
1740: tmp, ssh_err(r));
1741: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
1742: fatal("Cannot use public key for CA signature: %s",
1743: ssh_err(r));
1744: if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0)
1745: fatal("Retrieve agent key list: %s", ssh_err(r));
1746: found = 0;
1747: for (j = 0; j < agent_ids->nkeys; j++) {
1748: if (sshkey_equal(ca, agent_ids->keys[j])) {
1749: found = 1;
1750: break;
1751: }
1752: }
1753: if (!found)
1754: fatal("CA key %s not found in agent", tmp);
1755: ssh_free_identitylist(agent_ids);
1756: ca->flags |= SSHKEY_FLAG_EXT;
1757: } else {
1758: /* CA key is assumed to be a private key on the filesystem */
1.341 djm 1759: ca = load_identity(tmp, NULL);
1.305 djm 1760: }
1.227 djm 1761: free(tmp);
1.197 djm 1762:
1.290 djm 1763: if (key_type_name != NULL &&
1764: sshkey_type_from_name(key_type_name) != ca->type) {
1765: fatal("CA key type %s doesn't match specified %s",
1766: sshkey_ssh_name(ca), key_type_name);
1767: }
1.374 djm 1768: ca_fp = sshkey_fingerprint(ca, fingerprint_hash, SSH_FP_DEFAULT);
1.290 djm 1769:
1.179 djm 1770: for (i = 0; i < argc; i++) {
1771: /* Split list of principals */
1772: n = 0;
1773: if (cert_principals != NULL) {
1774: otmp = tmp = xstrdup(cert_principals);
1775: plist = NULL;
1776: for (; (cp = strsep(&tmp, ",")) != NULL; n++) {
1.270 deraadt 1777: plist = xreallocarray(plist, n + 1, sizeof(*plist));
1.179 djm 1778: if (*(plist[n] = xstrdup(cp)) == '\0')
1779: fatal("Empty principal name");
1780: }
1.227 djm 1781: free(otmp);
1.179 djm 1782: }
1.312 djm 1783: if (n > SSHKEY_CERT_MAX_PRINCIPALS)
1784: fatal("Too many certificate principals specified");
1.337 djm 1785:
1.179 djm 1786: tmp = tilde_expand_filename(argv[i], pw->pw_uid);
1.252 djm 1787: if ((r = sshkey_load_public(tmp, &public, &comment)) != 0)
1788: fatal("%s: unable to open \"%s\": %s",
1789: __func__, tmp, ssh_err(r));
1.366 djm 1790: if (sshkey_is_cert(public))
1.179 djm 1791: fatal("%s: key \"%s\" type %s cannot be certified",
1.252 djm 1792: __func__, tmp, sshkey_type(public));
1.179 djm 1793:
1794: /* Prepare certificate to sign */
1.275 djm 1795: if ((r = sshkey_to_certified(public)) != 0)
1.252 djm 1796: fatal("Could not upgrade key %s to certificate: %s",
1797: tmp, ssh_err(r));
1.179 djm 1798: public->cert->type = cert_key_type;
1.186 djm 1799: public->cert->serial = (u_int64_t)cert_serial;
1.179 djm 1800: public->cert->key_id = xstrdup(cert_key_id);
1801: public->cert->nprincipals = n;
1802: public->cert->principals = plist;
1803: public->cert->valid_after = cert_valid_from;
1804: public->cert->valid_before = cert_valid_to;
1.275 djm 1805: prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL);
1806: prepare_options_buf(public->cert->extensions,
1807: OPTIONS_EXTENSIONS);
1.252 djm 1808: if ((r = sshkey_from_private(ca,
1809: &public->cert->signature_key)) != 0)
1.304 markus 1810: fatal("sshkey_from_private (ca key): %s", ssh_err(r));
1.179 djm 1811:
1.305 djm 1812: if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) {
1813: if ((r = sshkey_certify_custom(public, ca,
1.358 djm 1814: key_type_name, sk_provider, agent_signer,
1815: &agent_fd)) != 0)
1.305 djm 1816: fatal("Couldn't certify key %s via agent: %s",
1817: tmp, ssh_err(r));
1818: } else {
1.374 djm 1819: if (sshkey_is_sk(ca) &&
1820: (ca->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
1821: notifier = notify_start(0,
1822: "Confirm user presence for key %s %s",
1823: sshkey_type(ca), ca_fp);
1824: }
1825: r = sshkey_certify(public, ca, key_type_name,
1826: sk_provider);
1827: notify_complete(notifier);
1828: if (r != 0)
1.305 djm 1829: fatal("Couldn't certify key %s: %s",
1830: tmp, ssh_err(r));
1831: }
1.179 djm 1832:
1833: if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0)
1834: *cp = '\0';
1835: xasprintf(&out, "%s-cert.pub", tmp);
1.227 djm 1836: free(tmp);
1.179 djm 1837:
1838: if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
1839: fatal("Could not open \"%s\" for writing: %s", out,
1840: strerror(errno));
1841: if ((f = fdopen(fd, "w")) == NULL)
1842: fatal("%s: fdopen: %s", __func__, strerror(errno));
1.252 djm 1843: if ((r = sshkey_write(public, f)) != 0)
1844: fatal("Could not write certified key to %s: %s",
1845: out, ssh_err(r));
1.179 djm 1846: fprintf(f, " %s\n", comment);
1847: fclose(f);
1848:
1.186 djm 1849: if (!quiet) {
1.282 djm 1850: sshkey_format_cert_validity(public->cert,
1.281 djm 1851: valid, sizeof(valid));
1.186 djm 1852: logit("Signed %s key %s: id \"%s\" serial %llu%s%s "
1.282 djm 1853: "valid %s", sshkey_cert_type(public),
1.205 djm 1854: out, public->cert->key_id,
1855: (unsigned long long)public->cert->serial,
1.179 djm 1856: cert_principals != NULL ? " for " : "",
1857: cert_principals != NULL ? cert_principals : "",
1.281 djm 1858: valid);
1.186 djm 1859: }
1.179 djm 1860:
1.252 djm 1861: sshkey_free(public);
1.227 djm 1862: free(out);
1.326 djm 1863: if (cert_serial_autoinc)
1864: cert_serial++;
1.179 djm 1865: }
1.374 djm 1866: free(ca_fp);
1.246 markus 1867: #ifdef ENABLE_PKCS11
1.197 djm 1868: pkcs11_terminate();
1.246 markus 1869: #endif
1.179 djm 1870: exit(0);
1871: }
1872:
1873: static u_int64_t
1874: parse_relative_time(const char *s, time_t now)
1875: {
1876: int64_t mul, secs;
1877:
1878: mul = *s == '-' ? -1 : 1;
1879:
1880: if ((secs = convtime(s + 1)) == -1)
1881: fatal("Invalid relative certificate time %s", s);
1882: if (mul == -1 && secs > now)
1883: fatal("Certificate time %s cannot be represented", s);
1884: return now + (u_int64_t)(secs * mul);
1885: }
1886:
1887: static void
1888: parse_cert_times(char *timespec)
1889: {
1890: char *from, *to;
1891: time_t now = time(NULL);
1892: int64_t secs;
1893:
1894: /* +timespec relative to now */
1895: if (*timespec == '+' && strchr(timespec, ':') == NULL) {
1896: if ((secs = convtime(timespec + 1)) == -1)
1897: fatal("Invalid relative certificate life %s", timespec);
1898: cert_valid_to = now + secs;
1899: /*
1900: * Backdate certificate one minute to avoid problems on hosts
1901: * with poorly-synchronised clocks.
1902: */
1903: cert_valid_from = ((now - 59)/ 60) * 60;
1904: return;
1905: }
1906:
1907: /*
1908: * from:to, where
1.308 djm 1909: * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "always"
1910: * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "forever"
1.179 djm 1911: */
1912: from = xstrdup(timespec);
1913: to = strchr(from, ':');
1914: if (to == NULL || from == to || *(to + 1) == '\0')
1.181 djm 1915: fatal("Invalid certificate life specification %s", timespec);
1.179 djm 1916: *to++ = '\0';
1917:
1918: if (*from == '-' || *from == '+')
1919: cert_valid_from = parse_relative_time(from, now);
1.308 djm 1920: else if (strcmp(from, "always") == 0)
1921: cert_valid_from = 0;
1.314 djm 1922: else if (parse_absolute_time(from, &cert_valid_from) != 0)
1923: fatal("Invalid from time \"%s\"", from);
1.179 djm 1924:
1925: if (*to == '-' || *to == '+')
1.235 djm 1926: cert_valid_to = parse_relative_time(to, now);
1.308 djm 1927: else if (strcmp(to, "forever") == 0)
1928: cert_valid_to = ~(u_int64_t)0;
1.314 djm 1929: else if (parse_absolute_time(to, &cert_valid_to) != 0)
1930: fatal("Invalid to time \"%s\"", to);
1.179 djm 1931:
1932: if (cert_valid_to <= cert_valid_from)
1933: fatal("Empty certificate validity interval");
1.227 djm 1934: free(from);
1.179 djm 1935: }
1936:
1937: static void
1.186 djm 1938: add_cert_option(char *opt)
1.179 djm 1939: {
1.300 djm 1940: char *val, *cp;
1941: int iscrit = 0;
1.179 djm 1942:
1.208 stevesk 1943: if (strcasecmp(opt, "clear") == 0)
1.190 djm 1944: certflags_flags = 0;
1.179 djm 1945: else if (strcasecmp(opt, "no-x11-forwarding") == 0)
1.190 djm 1946: certflags_flags &= ~CERTOPT_X_FWD;
1.179 djm 1947: else if (strcasecmp(opt, "permit-x11-forwarding") == 0)
1.190 djm 1948: certflags_flags |= CERTOPT_X_FWD;
1.179 djm 1949: else if (strcasecmp(opt, "no-agent-forwarding") == 0)
1.190 djm 1950: certflags_flags &= ~CERTOPT_AGENT_FWD;
1.179 djm 1951: else if (strcasecmp(opt, "permit-agent-forwarding") == 0)
1.190 djm 1952: certflags_flags |= CERTOPT_AGENT_FWD;
1.179 djm 1953: else if (strcasecmp(opt, "no-port-forwarding") == 0)
1.190 djm 1954: certflags_flags &= ~CERTOPT_PORT_FWD;
1.179 djm 1955: else if (strcasecmp(opt, "permit-port-forwarding") == 0)
1.190 djm 1956: certflags_flags |= CERTOPT_PORT_FWD;
1.179 djm 1957: else if (strcasecmp(opt, "no-pty") == 0)
1.190 djm 1958: certflags_flags &= ~CERTOPT_PTY;
1.179 djm 1959: else if (strcasecmp(opt, "permit-pty") == 0)
1.190 djm 1960: certflags_flags |= CERTOPT_PTY;
1.179 djm 1961: else if (strcasecmp(opt, "no-user-rc") == 0)
1.190 djm 1962: certflags_flags &= ~CERTOPT_USER_RC;
1.179 djm 1963: else if (strcasecmp(opt, "permit-user-rc") == 0)
1.190 djm 1964: certflags_flags |= CERTOPT_USER_RC;
1.371 djm 1965: else if (strcasecmp(opt, "touch-required") == 0)
1966: certflags_flags &= ~CERTOPT_NO_REQUIRE_USER_PRESENCE;
1967: else if (strcasecmp(opt, "no-touch-required") == 0)
1968: certflags_flags |= CERTOPT_NO_REQUIRE_USER_PRESENCE;
1.179 djm 1969: else if (strncasecmp(opt, "force-command=", 14) == 0) {
1970: val = opt + 14;
1971: if (*val == '\0')
1.186 djm 1972: fatal("Empty force-command option");
1.190 djm 1973: if (certflags_command != NULL)
1.179 djm 1974: fatal("force-command already specified");
1.190 djm 1975: certflags_command = xstrdup(val);
1.179 djm 1976: } else if (strncasecmp(opt, "source-address=", 15) == 0) {
1977: val = opt + 15;
1978: if (*val == '\0')
1.186 djm 1979: fatal("Empty source-address option");
1.190 djm 1980: if (certflags_src_addr != NULL)
1.179 djm 1981: fatal("source-address already specified");
1982: if (addr_match_cidr_list(NULL, val) != 0)
1983: fatal("Invalid source-address list");
1.190 djm 1984: certflags_src_addr = xstrdup(val);
1.300 djm 1985: } else if (strncasecmp(opt, "extension:", 10) == 0 ||
1986: (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) {
1987: val = xstrdup(strchr(opt, ':') + 1);
1988: if ((cp = strchr(val, '=')) != NULL)
1989: *cp++ = '\0';
1990: cert_userext = xreallocarray(cert_userext, ncert_userext + 1,
1991: sizeof(*cert_userext));
1992: cert_userext[ncert_userext].key = val;
1993: cert_userext[ncert_userext].val = cp == NULL ?
1994: NULL : xstrdup(cp);
1995: cert_userext[ncert_userext].crit = iscrit;
1996: ncert_userext++;
1.179 djm 1997: } else
1.186 djm 1998: fatal("Unsupported certificate option \"%s\"", opt);
1.179 djm 1999: }
2000:
1.63 itojun 2001: static void
1.275 djm 2002: show_options(struct sshbuf *optbuf, int in_critical)
1.192 djm 2003: {
1.245 djm 2004: char *name, *arg;
1.252 djm 2005: struct sshbuf *options, *option = NULL;
2006: int r;
2007:
2008: if ((options = sshbuf_fromb(optbuf)) == NULL)
2009: fatal("%s: sshbuf_fromb failed", __func__);
2010: while (sshbuf_len(options) != 0) {
2011: sshbuf_free(option);
2012: option = NULL;
2013: if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 ||
2014: (r = sshbuf_froms(options, &option)) != 0)
2015: fatal("%s: buffer error: %s", __func__, ssh_err(r));
1.192 djm 2016: printf(" %s", name);
1.275 djm 2017: if (!in_critical &&
1.192 djm 2018: (strcmp(name, "permit-X11-forwarding") == 0 ||
2019: strcmp(name, "permit-agent-forwarding") == 0 ||
2020: strcmp(name, "permit-port-forwarding") == 0 ||
2021: strcmp(name, "permit-pty") == 0 ||
1.371 djm 2022: strcmp(name, "permit-user-rc") == 0 ||
2023: strcmp(name, "no-touch-required") == 0)) {
1.192 djm 2024: printf("\n");
1.371 djm 2025: } else if (in_critical &&
1.192 djm 2026: (strcmp(name, "force-command") == 0 ||
2027: strcmp(name, "source-address") == 0)) {
1.252 djm 2028: if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0)
2029: fatal("%s: buffer error: %s",
2030: __func__, ssh_err(r));
1.245 djm 2031: printf(" %s\n", arg);
2032: free(arg);
1.192 djm 2033: } else {
1.252 djm 2034: printf(" UNKNOWN OPTION (len %zu)\n",
2035: sshbuf_len(option));
2036: sshbuf_reset(option);
1.192 djm 2037: }
1.227 djm 2038: free(name);
1.252 djm 2039: if (sshbuf_len(option) != 0)
1.192 djm 2040: fatal("Option corrupt: extra data at end");
2041: }
1.252 djm 2042: sshbuf_free(option);
2043: sshbuf_free(options);
1.192 djm 2044: }
2045:
2046: static void
1.278 djm 2047: print_cert(struct sshkey *key)
1.182 djm 2048: {
1.281 djm 2049: char valid[64], *key_fp, *ca_fp;
1.275 djm 2050: u_int i;
1.186 djm 2051:
1.252 djm 2052: key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT);
2053: ca_fp = sshkey_fingerprint(key->cert->signature_key,
1.251 djm 2054: fingerprint_hash, SSH_FP_DEFAULT);
1.259 djm 2055: if (key_fp == NULL || ca_fp == NULL)
2056: fatal("%s: sshkey_fingerprint fail", __func__);
1.281 djm 2057: sshkey_format_cert_validity(key->cert, valid, sizeof(valid));
1.182 djm 2058:
1.252 djm 2059: printf(" Type: %s %s certificate\n", sshkey_ssh_name(key),
2060: sshkey_cert_type(key));
2061: printf(" Public key: %s %s\n", sshkey_type(key), key_fp);
1.323 djm 2062: printf(" Signing CA: %s %s (using %s)\n",
2063: sshkey_type(key->cert->signature_key), ca_fp,
2064: key->cert->signature_type);
1.186 djm 2065: printf(" Key ID: \"%s\"\n", key->cert->key_id);
1.275 djm 2066: printf(" Serial: %llu\n", (unsigned long long)key->cert->serial);
1.281 djm 2067: printf(" Valid: %s\n", valid);
1.182 djm 2068: printf(" Principals: ");
2069: if (key->cert->nprincipals == 0)
2070: printf("(none)\n");
2071: else {
2072: for (i = 0; i < key->cert->nprincipals; i++)
2073: printf("\n %s",
2074: key->cert->principals[i]);
2075: printf("\n");
2076: }
1.186 djm 2077: printf(" Critical Options: ");
1.252 djm 2078: if (sshbuf_len(key->cert->critical) == 0)
1.182 djm 2079: printf("(none)\n");
2080: else {
2081: printf("\n");
1.275 djm 2082: show_options(key->cert->critical, 1);
1.186 djm 2083: }
1.275 djm 2084: printf(" Extensions: ");
2085: if (sshbuf_len(key->cert->extensions) == 0)
2086: printf("(none)\n");
2087: else {
2088: printf("\n");
2089: show_options(key->cert->extensions, 0);
1.182 djm 2090: }
1.278 djm 2091: }
2092:
2093: static void
2094: do_show_cert(struct passwd *pw)
2095: {
2096: struct sshkey *key = NULL;
2097: struct stat st;
2098: int r, is_stdin = 0, ok = 0;
2099: FILE *f;
1.317 markus 2100: char *cp, *line = NULL;
1.278 djm 2101: const char *path;
1.317 markus 2102: size_t linesize = 0;
1.289 djm 2103: u_long lnum = 0;
1.278 djm 2104:
2105: if (!have_identity)
2106: ask_filename(pw, "Enter file in which the key is");
1.333 deraadt 2107: if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1)
1.278 djm 2108: fatal("%s: %s: %s", __progname, identity_file, strerror(errno));
2109:
2110: path = identity_file;
2111: if (strcmp(path, "-") == 0) {
2112: f = stdin;
2113: path = "(stdin)";
2114: is_stdin = 1;
2115: } else if ((f = fopen(identity_file, "r")) == NULL)
2116: fatal("fopen %s: %s", identity_file, strerror(errno));
2117:
1.317 markus 2118: while (getline(&line, &linesize, f) != -1) {
2119: lnum++;
1.278 djm 2120: sshkey_free(key);
2121: key = NULL;
2122: /* Trim leading space and comments */
2123: cp = line + strspn(line, " \t");
2124: if (*cp == '#' || *cp == '\0')
2125: continue;
2126: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2127: fatal("sshkey_new");
1.278 djm 2128: if ((r = sshkey_read(key, &cp)) != 0) {
2129: error("%s:%lu: invalid key: %s", path,
2130: lnum, ssh_err(r));
2131: continue;
2132: }
2133: if (!sshkey_is_cert(key)) {
2134: error("%s:%lu is not a certificate", path, lnum);
2135: continue;
2136: }
2137: ok = 1;
2138: if (!is_stdin && lnum == 1)
2139: printf("%s:\n", path);
2140: else
2141: printf("%s:%lu:\n", path, lnum);
2142: print_cert(key);
2143: }
1.317 markus 2144: free(line);
1.278 djm 2145: sshkey_free(key);
2146: fclose(f);
2147: exit(ok ? 0 : 1);
1.182 djm 2148: }
2149:
2150: static void
1.223 djm 2151: load_krl(const char *path, struct ssh_krl **krlp)
2152: {
1.252 djm 2153: struct sshbuf *krlbuf;
2154: int r, fd;
1.223 djm 2155:
1.252 djm 2156: if ((krlbuf = sshbuf_new()) == NULL)
2157: fatal("sshbuf_new failed");
1.223 djm 2158: if ((fd = open(path, O_RDONLY)) == -1)
2159: fatal("open %s: %s", path, strerror(errno));
1.252 djm 2160: if ((r = sshkey_load_file(fd, krlbuf)) != 0)
2161: fatal("Unable to load KRL: %s", ssh_err(r));
1.223 djm 2162: close(fd);
2163: /* XXX check sigs */
1.252 djm 2164: if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 ||
1.223 djm 2165: *krlp == NULL)
1.252 djm 2166: fatal("Invalid KRL file: %s", ssh_err(r));
2167: sshbuf_free(krlbuf);
1.223 djm 2168: }
2169:
2170: static void
1.320 djm 2171: hash_to_blob(const char *cp, u_char **blobp, size_t *lenp,
2172: const char *file, u_long lnum)
2173: {
2174: char *tmp;
2175: size_t tlen;
2176: struct sshbuf *b;
2177: int r;
2178:
2179: if (strncmp(cp, "SHA256:", 7) != 0)
2180: fatal("%s:%lu: unsupported hash algorithm", file, lnum);
2181: cp += 7;
2182:
2183: /*
2184: * OpenSSH base64 hashes omit trailing '='
2185: * characters; put them back for decode.
2186: */
2187: tlen = strlen(cp);
2188: tmp = xmalloc(tlen + 4 + 1);
2189: strlcpy(tmp, cp, tlen + 1);
2190: while ((tlen % 4) != 0) {
2191: tmp[tlen++] = '=';
2192: tmp[tlen] = '\0';
2193: }
2194: if ((b = sshbuf_new()) == NULL)
2195: fatal("%s: sshbuf_new failed", __func__);
2196: if ((r = sshbuf_b64tod(b, tmp)) != 0)
2197: fatal("%s:%lu: decode hash failed: %s", file, lnum, ssh_err(r));
2198: free(tmp);
2199: *lenp = sshbuf_len(b);
2200: *blobp = xmalloc(*lenp);
2201: memcpy(*blobp, sshbuf_ptr(b), *lenp);
2202: sshbuf_free(b);
2203: }
2204:
2205: static void
1.261 djm 2206: update_krl_from_file(struct passwd *pw, const char *file, int wild_ca,
1.252 djm 2207: const struct sshkey *ca, struct ssh_krl *krl)
1.223 djm 2208: {
1.252 djm 2209: struct sshkey *key = NULL;
1.223 djm 2210: u_long lnum = 0;
1.317 markus 2211: char *path, *cp, *ep, *line = NULL;
1.320 djm 2212: u_char *blob = NULL;
2213: size_t blen = 0, linesize = 0;
1.223 djm 2214: unsigned long long serial, serial2;
1.320 djm 2215: int i, was_explicit_key, was_sha1, was_sha256, was_hash, r;
1.223 djm 2216: FILE *krl_spec;
2217:
2218: path = tilde_expand_filename(file, pw->pw_uid);
2219: if (strcmp(path, "-") == 0) {
2220: krl_spec = stdin;
2221: free(path);
2222: path = xstrdup("(standard input)");
2223: } else if ((krl_spec = fopen(path, "r")) == NULL)
2224: fatal("fopen %s: %s", path, strerror(errno));
2225:
2226: if (!quiet)
2227: printf("Revoking from %s\n", path);
1.317 markus 2228: while (getline(&line, &linesize, krl_spec) != -1) {
2229: lnum++;
1.320 djm 2230: was_explicit_key = was_sha1 = was_sha256 = was_hash = 0;
1.223 djm 2231: cp = line + strspn(line, " \t");
2232: /* Trim trailing space, comments and strip \n */
2233: for (i = 0, r = -1; cp[i] != '\0'; i++) {
2234: if (cp[i] == '#' || cp[i] == '\n') {
2235: cp[i] = '\0';
2236: break;
2237: }
2238: if (cp[i] == ' ' || cp[i] == '\t') {
2239: /* Remember the start of a span of whitespace */
2240: if (r == -1)
2241: r = i;
2242: } else
2243: r = -1;
2244: }
2245: if (r != -1)
2246: cp[r] = '\0';
2247: if (*cp == '\0')
2248: continue;
2249: if (strncasecmp(cp, "serial:", 7) == 0) {
1.261 djm 2250: if (ca == NULL && !wild_ca) {
1.231 djm 2251: fatal("revoking certificates by serial number "
1.223 djm 2252: "requires specification of a CA key");
2253: }
2254: cp += 7;
2255: cp = cp + strspn(cp, " \t");
2256: errno = 0;
2257: serial = strtoull(cp, &ep, 0);
2258: if (*cp == '\0' || (*ep != '\0' && *ep != '-'))
2259: fatal("%s:%lu: invalid serial \"%s\"",
2260: path, lnum, cp);
2261: if (errno == ERANGE && serial == ULLONG_MAX)
2262: fatal("%s:%lu: serial out of range",
2263: path, lnum);
2264: serial2 = serial;
2265: if (*ep == '-') {
2266: cp = ep + 1;
2267: errno = 0;
2268: serial2 = strtoull(cp, &ep, 0);
2269: if (*cp == '\0' || *ep != '\0')
2270: fatal("%s:%lu: invalid serial \"%s\"",
2271: path, lnum, cp);
2272: if (errno == ERANGE && serial2 == ULLONG_MAX)
2273: fatal("%s:%lu: serial out of range",
2274: path, lnum);
2275: if (serial2 <= serial)
2276: fatal("%s:%lu: invalid serial range "
2277: "%llu:%llu", path, lnum,
2278: (unsigned long long)serial,
2279: (unsigned long long)serial2);
2280: }
2281: if (ssh_krl_revoke_cert_by_serial_range(krl,
2282: ca, serial, serial2) != 0) {
2283: fatal("%s: revoke serial failed",
2284: __func__);
2285: }
2286: } else if (strncasecmp(cp, "id:", 3) == 0) {
1.261 djm 2287: if (ca == NULL && !wild_ca) {
1.232 djm 2288: fatal("revoking certificates by key ID "
1.223 djm 2289: "requires specification of a CA key");
2290: }
2291: cp += 3;
2292: cp = cp + strspn(cp, " \t");
2293: if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0)
2294: fatal("%s: revoke key ID failed", __func__);
1.320 djm 2295: } else if (strncasecmp(cp, "hash:", 5) == 0) {
2296: cp += 5;
2297: cp = cp + strspn(cp, " \t");
2298: hash_to_blob(cp, &blob, &blen, file, lnum);
2299: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
1.223 djm 2300: } else {
2301: if (strncasecmp(cp, "key:", 4) == 0) {
2302: cp += 4;
2303: cp = cp + strspn(cp, " \t");
2304: was_explicit_key = 1;
2305: } else if (strncasecmp(cp, "sha1:", 5) == 0) {
2306: cp += 5;
2307: cp = cp + strspn(cp, " \t");
2308: was_sha1 = 1;
1.320 djm 2309: } else if (strncasecmp(cp, "sha256:", 7) == 0) {
2310: cp += 7;
2311: cp = cp + strspn(cp, " \t");
2312: was_sha256 = 1;
1.223 djm 2313: /*
2314: * Just try to process the line as a key.
2315: * Parsing will fail if it isn't.
2316: */
2317: }
1.252 djm 2318: if ((key = sshkey_new(KEY_UNSPEC)) == NULL)
1.304 markus 2319: fatal("sshkey_new");
1.252 djm 2320: if ((r = sshkey_read(key, &cp)) != 0)
2321: fatal("%s:%lu: invalid key: %s",
2322: path, lnum, ssh_err(r));
1.223 djm 2323: if (was_explicit_key)
2324: r = ssh_krl_revoke_key_explicit(krl, key);
1.320 djm 2325: else if (was_sha1) {
2326: if (sshkey_fingerprint_raw(key,
2327: SSH_DIGEST_SHA1, &blob, &blen) != 0) {
2328: fatal("%s:%lu: fingerprint failed",
2329: file, lnum);
2330: }
2331: r = ssh_krl_revoke_key_sha1(krl, blob, blen);
2332: } else if (was_sha256) {
2333: if (sshkey_fingerprint_raw(key,
2334: SSH_DIGEST_SHA256, &blob, &blen) != 0) {
2335: fatal("%s:%lu: fingerprint failed",
2336: file, lnum);
2337: }
2338: r = ssh_krl_revoke_key_sha256(krl, blob, blen);
2339: } else
1.223 djm 2340: r = ssh_krl_revoke_key(krl, key);
2341: if (r != 0)
1.252 djm 2342: fatal("%s: revoke key failed: %s",
2343: __func__, ssh_err(r));
1.320 djm 2344: freezero(blob, blen);
2345: blob = NULL;
2346: blen = 0;
1.252 djm 2347: sshkey_free(key);
1.223 djm 2348: }
2349: }
2350: if (strcmp(path, "-") != 0)
2351: fclose(krl_spec);
1.317 markus 2352: free(line);
1.226 djm 2353: free(path);
1.223 djm 2354: }
2355:
2356: static void
1.325 djm 2357: do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path,
2358: unsigned long long krl_version, const char *krl_comment,
2359: int argc, char **argv)
1.223 djm 2360: {
2361: struct ssh_krl *krl;
2362: struct stat sb;
1.252 djm 2363: struct sshkey *ca = NULL;
1.261 djm 2364: int fd, i, r, wild_ca = 0;
1.223 djm 2365: char *tmp;
1.252 djm 2366: struct sshbuf *kbuf;
1.223 djm 2367:
2368: if (*identity_file == '\0')
2369: fatal("KRL generation requires an output file");
2370: if (stat(identity_file, &sb) == -1) {
2371: if (errno != ENOENT)
2372: fatal("Cannot access KRL \"%s\": %s",
2373: identity_file, strerror(errno));
2374: if (updating)
2375: fatal("KRL \"%s\" does not exist", identity_file);
2376: }
2377: if (ca_key_path != NULL) {
1.261 djm 2378: if (strcasecmp(ca_key_path, "none") == 0)
2379: wild_ca = 1;
2380: else {
2381: tmp = tilde_expand_filename(ca_key_path, pw->pw_uid);
2382: if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0)
2383: fatal("Cannot load CA public key %s: %s",
2384: tmp, ssh_err(r));
2385: free(tmp);
2386: }
1.223 djm 2387: }
2388:
2389: if (updating)
2390: load_krl(identity_file, &krl);
2391: else if ((krl = ssh_krl_init()) == NULL)
2392: fatal("couldn't create KRL");
2393:
1.325 djm 2394: if (krl_version != 0)
2395: ssh_krl_set_version(krl, krl_version);
2396: if (krl_comment != NULL)
2397: ssh_krl_set_comment(krl, krl_comment);
1.223 djm 2398:
2399: for (i = 0; i < argc; i++)
1.261 djm 2400: update_krl_from_file(pw, argv[i], wild_ca, ca, krl);
1.223 djm 2401:
1.252 djm 2402: if ((kbuf = sshbuf_new()) == NULL)
2403: fatal("sshbuf_new failed");
2404: if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0)
1.223 djm 2405: fatal("Couldn't generate KRL");
2406: if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1)
2407: fatal("open %s: %s", identity_file, strerror(errno));
1.318 markus 2408: if (atomicio(vwrite, fd, sshbuf_mutable_ptr(kbuf), sshbuf_len(kbuf)) !=
1.252 djm 2409: sshbuf_len(kbuf))
1.223 djm 2410: fatal("write %s: %s", identity_file, strerror(errno));
2411: close(fd);
1.252 djm 2412: sshbuf_free(kbuf);
1.223 djm 2413: ssh_krl_free(krl);
1.286 mmcc 2414: sshkey_free(ca);
1.223 djm 2415: }
2416:
2417: static void
2418: do_check_krl(struct passwd *pw, int argc, char **argv)
2419: {
2420: int i, r, ret = 0;
2421: char *comment;
2422: struct ssh_krl *krl;
1.252 djm 2423: struct sshkey *k;
1.223 djm 2424:
2425: if (*identity_file == '\0')
2426: fatal("KRL checking requires an input file");
2427: load_krl(identity_file, &krl);
2428: for (i = 0; i < argc; i++) {
1.252 djm 2429: if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0)
2430: fatal("Cannot load public key %s: %s",
2431: argv[i], ssh_err(r));
1.223 djm 2432: r = ssh_krl_check_key(krl, k);
2433: printf("%s%s%s%s: %s\n", argv[i],
2434: *comment ? " (" : "", comment, *comment ? ")" : "",
2435: r == 0 ? "ok" : "REVOKED");
2436: if (r != 0)
2437: ret = 1;
1.252 djm 2438: sshkey_free(k);
1.223 djm 2439: free(comment);
2440: }
2441: ssh_krl_free(krl);
2442: exit(ret);
2443: }
2444:
1.344 djm 2445: static struct sshkey *
2446: load_sign_key(const char *keypath, const struct sshkey *pubkey)
2447: {
2448: size_t i, slen, plen = strlen(keypath);
2449: char *privpath = xstrdup(keypath);
2450: const char *suffixes[] = { "-cert.pub", ".pub", NULL };
2451: struct sshkey *ret = NULL, *privkey = NULL;
2452: int r;
2453:
2454: /*
2455: * If passed a public key filename, then try to locate the correponding
2456: * private key. This lets us specify certificates on the command-line
2457: * and have ssh-keygen find the appropriate private key.
2458: */
2459: for (i = 0; suffixes[i]; i++) {
2460: slen = strlen(suffixes[i]);
2461: if (plen <= slen ||
2462: strcmp(privpath + plen - slen, suffixes[i]) != 0)
2463: continue;
2464: privpath[plen - slen] = '\0';
2465: debug("%s: %s looks like a public key, using private key "
2466: "path %s instead", __func__, keypath, privpath);
2467: }
2468: if ((privkey = load_identity(privpath, NULL)) == NULL) {
2469: error("Couldn't load identity %s", keypath);
2470: goto done;
2471: }
2472: if (!sshkey_equal_public(pubkey, privkey)) {
2473: error("Public key %s doesn't match private %s",
2474: keypath, privpath);
2475: goto done;
2476: }
2477: if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) {
2478: /*
2479: * Graft the certificate onto the private key to make
2480: * it capable of signing.
2481: */
2482: if ((r = sshkey_to_certified(privkey)) != 0) {
2483: error("%s: sshkey_to_certified: %s", __func__,
2484: ssh_err(r));
2485: goto done;
2486: }
2487: if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) {
2488: error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r));
2489: goto done;
2490: }
2491: }
2492: /* success */
2493: ret = privkey;
2494: privkey = NULL;
2495: done:
2496: sshkey_free(privkey);
2497: free(privpath);
2498: return ret;
2499: }
2500:
2501: static int
2502: sign_one(struct sshkey *signkey, const char *filename, int fd,
2503: const char *sig_namespace, sshsig_signer *signer, void *signer_ctx)
2504: {
2505: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2506: int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno;
1.363 djm 2507: char *wfile = NULL, *asig = NULL, *fp = NULL;
1.344 djm 2508:
2509: if (!quiet) {
2510: if (fd == STDIN_FILENO)
2511: fprintf(stderr, "Signing data on standard input\n");
2512: else
2513: fprintf(stderr, "Signing file %s\n", filename);
1.363 djm 2514: }
2515: if (signer == NULL && sshkey_is_sk(signkey) &&
2516: (signkey->sk_flags & SSH_SK_USER_PRESENCE_REQD)) {
2517: if ((fp = sshkey_fingerprint(signkey, fingerprint_hash,
2518: SSH_FP_DEFAULT)) == NULL)
2519: fatal("%s: sshkey_fingerprint failed", __func__);
2520: fprintf(stderr, "Confirm user presence for key %s %s\n",
2521: sshkey_type(signkey), fp);
2522: free(fp);
1.344 djm 2523: }
1.358 djm 2524: if ((r = sshsig_sign_fd(signkey, NULL, sk_provider, fd, sig_namespace,
1.344 djm 2525: &sigbuf, signer, signer_ctx)) != 0) {
2526: error("Signing %s failed: %s", filename, ssh_err(r));
2527: goto out;
2528: }
2529: if ((r = sshsig_armor(sigbuf, &abuf)) != 0) {
2530: error("%s: sshsig_armor: %s", __func__, ssh_err(r));
2531: goto out;
2532: }
2533: if ((asig = sshbuf_dup_string(abuf)) == NULL) {
2534: error("%s: buffer error", __func__);
2535: r = SSH_ERR_ALLOC_FAIL;
2536: goto out;
2537: }
2538:
2539: if (fd == STDIN_FILENO) {
2540: fputs(asig, stdout);
2541: fflush(stdout);
2542: } else {
2543: xasprintf(&wfile, "%s.sig", filename);
2544: if (confirm_overwrite(wfile)) {
2545: if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC,
2546: 0666)) == -1) {
2547: oerrno = errno;
2548: error("Cannot open %s: %s",
2549: wfile, strerror(errno));
2550: errno = oerrno;
2551: r = SSH_ERR_SYSTEM_ERROR;
2552: goto out;
2553: }
2554: if (atomicio(vwrite, wfd, asig,
2555: strlen(asig)) != strlen(asig)) {
2556: oerrno = errno;
2557: error("Cannot write to %s: %s",
2558: wfile, strerror(errno));
2559: errno = oerrno;
2560: r = SSH_ERR_SYSTEM_ERROR;
2561: goto out;
2562: }
2563: if (!quiet) {
2564: fprintf(stderr, "Write signature to %s\n",
2565: wfile);
2566: }
2567: }
2568: }
2569: /* success */
2570: r = 0;
2571: out:
2572: free(wfile);
2573: free(asig);
2574: sshbuf_free(abuf);
2575: sshbuf_free(sigbuf);
2576: if (wfd != -1)
2577: close(wfd);
2578: return r;
2579: }
2580:
2581: static int
1.386 djm 2582: sig_sign(const char *keypath, const char *sig_namespace, int argc, char **argv)
1.344 djm 2583: {
2584: int i, fd = -1, r, ret = -1;
2585: int agent_fd = -1;
2586: struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL;
2587: sshsig_signer *signer = NULL;
2588:
2589: /* Check file arguments. */
2590: for (i = 0; i < argc; i++) {
2591: if (strcmp(argv[i], "-") != 0)
2592: continue;
2593: if (i > 0 || argc > 1)
2594: fatal("Cannot sign mix of paths and standard input");
2595: }
2596:
2597: if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) {
2598: error("Couldn't load public key %s: %s", keypath, ssh_err(r));
2599: goto done;
2600: }
2601:
2602: if ((r = ssh_get_authentication_socket(&agent_fd)) != 0)
2603: debug("Couldn't get agent socket: %s", ssh_err(r));
2604: else {
2605: if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0)
2606: signer = agent_signer;
2607: else
2608: debug("Couldn't find key in agent: %s", ssh_err(r));
2609: }
2610:
2611: if (signer == NULL) {
2612: /* Not using agent - try to load private key */
2613: if ((privkey = load_sign_key(keypath, pubkey)) == NULL)
2614: goto done;
2615: signkey = privkey;
2616: } else {
2617: /* Will use key in agent */
2618: signkey = pubkey;
2619: }
2620:
2621: if (argc == 0) {
2622: if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO,
2623: sig_namespace, signer, &agent_fd)) != 0)
2624: goto done;
2625: } else {
2626: for (i = 0; i < argc; i++) {
2627: if (strcmp(argv[i], "-") == 0)
2628: fd = STDIN_FILENO;
2629: else if ((fd = open(argv[i], O_RDONLY)) == -1) {
2630: error("Cannot open %s for signing: %s",
2631: argv[i], strerror(errno));
2632: goto done;
2633: }
2634: if ((r = sign_one(signkey, argv[i], fd, sig_namespace,
2635: signer, &agent_fd)) != 0)
2636: goto done;
2637: if (fd != STDIN_FILENO)
2638: close(fd);
2639: fd = -1;
2640: }
2641: }
2642:
2643: ret = 0;
2644: done:
2645: if (fd != -1 && fd != STDIN_FILENO)
2646: close(fd);
2647: sshkey_free(pubkey);
2648: sshkey_free(privkey);
2649: return ret;
2650: }
2651:
2652: static int
1.386 djm 2653: sig_verify(const char *signature, const char *sig_namespace,
2654: const char *principal, const char *allowed_keys, const char *revoked_keys)
1.344 djm 2655: {
2656: int r, ret = -1, sigfd = -1;
2657: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2658: struct sshkey *sign_key = NULL;
2659: char *fp = NULL;
1.370 djm 2660: struct sshkey_sig_details *sig_details = NULL;
1.344 djm 2661:
1.370 djm 2662: memset(&sig_details, 0, sizeof(sig_details));
1.344 djm 2663: if ((abuf = sshbuf_new()) == NULL)
2664: fatal("%s: sshbuf_new() failed", __func__);
2665:
2666: if ((sigfd = open(signature, O_RDONLY)) < 0) {
2667: error("Couldn't open signature file %s", signature);
2668: goto done;
2669: }
2670:
2671: if ((r = sshkey_load_file(sigfd, abuf)) != 0) {
2672: error("Couldn't read signature file: %s", ssh_err(r));
2673: goto done;
2674: }
2675: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
2676: error("%s: sshsig_armor: %s", __func__, ssh_err(r));
1.386 djm 2677: goto done;
1.344 djm 2678: }
2679: if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace,
1.370 djm 2680: &sign_key, &sig_details)) != 0)
1.344 djm 2681: goto done; /* sshsig_verify() prints error */
2682:
2683: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2684: SSH_FP_DEFAULT)) == NULL)
2685: fatal("%s: sshkey_fingerprint failed", __func__);
2686: debug("Valid (unverified) signature from key %s", fp);
1.370 djm 2687: if (sig_details != NULL) {
2688: debug2("%s: signature details: counter = %u, flags = 0x%02x",
2689: __func__, sig_details->sk_counter, sig_details->sk_flags);
2690: }
1.344 djm 2691: free(fp);
2692: fp = NULL;
2693:
2694: if (revoked_keys != NULL) {
1.345 djm 2695: if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) {
2696: debug3("sshkey_check_revoked failed: %s", ssh_err(r));
2697: goto done;
2698: }
1.344 djm 2699: }
2700:
1.350 djm 2701: if (allowed_keys != NULL &&
2702: (r = sshsig_check_allowed_keys(allowed_keys, sign_key,
2703: principal, sig_namespace)) != 0) {
1.344 djm 2704: debug3("sshsig_check_allowed_keys failed: %s", ssh_err(r));
2705: goto done;
2706: }
2707: /* success */
2708: ret = 0;
2709: done:
2710: if (!quiet) {
2711: if (ret == 0) {
2712: if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash,
2713: SSH_FP_DEFAULT)) == NULL) {
2714: fatal("%s: sshkey_fingerprint failed",
2715: __func__);
2716: }
1.350 djm 2717: if (principal == NULL) {
2718: printf("Good \"%s\" signature with %s key %s\n",
2719: sig_namespace, sshkey_type(sign_key), fp);
2720:
2721: } else {
2722: printf("Good \"%s\" signature for %s with %s key %s\n",
2723: sig_namespace, principal,
2724: sshkey_type(sign_key), fp);
2725: }
1.344 djm 2726: } else {
2727: printf("Could not verify signature.\n");
2728: }
2729: }
2730: if (sigfd != -1)
2731: close(sigfd);
2732: sshbuf_free(sigbuf);
2733: sshbuf_free(abuf);
2734: sshkey_free(sign_key);
1.370 djm 2735: sshkey_sig_details_free(sig_details);
1.344 djm 2736: free(fp);
2737: return ret;
2738: }
2739:
1.386 djm 2740: static int
1.388 ! djm 2741: sig_find_principals(const char *signature, const char *allowed_keys) {
1.386 djm 2742: int r, ret = -1, sigfd = -1;
2743: struct sshbuf *sigbuf = NULL, *abuf = NULL;
2744: struct sshkey *sign_key = NULL;
1.388 ! djm 2745: char *principals = NULL;
1.386 djm 2746:
2747: if ((abuf = sshbuf_new()) == NULL)
2748: fatal("%s: sshbuf_new() failed", __func__);
2749:
2750: if ((sigfd = open(signature, O_RDONLY)) < 0) {
2751: error("Couldn't open signature file %s", signature);
2752: goto done;
2753: }
2754:
2755: if ((r = sshkey_load_file(sigfd, abuf)) != 0) {
2756: error("Couldn't read signature file: %s", ssh_err(r));
2757: goto done;
2758: }
2759: if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) {
2760: error("%s: sshsig_armor: %s", __func__, ssh_err(r));
2761: goto done;
2762: }
2763: if ((r = sshsig_get_pubkey(sigbuf, &sign_key)) != 0) {
2764: error("%s: sshsig_get_pubkey: %s",
1.388 ! djm 2765: __func__, ssh_err(r));
1.386 djm 2766: goto done;
2767: }
1.388 ! djm 2768: if ((r = sshsig_find_principals(allowed_keys, sign_key,
! 2769: &principals)) != 0) {
1.386 djm 2770: error("%s: sshsig_get_principal: %s",
2771: __func__, ssh_err(r));
2772: goto done;
2773: }
2774: ret = 0;
2775: done:
2776: if (ret == 0 ) {
1.388 ! djm 2777: printf("Found matching principal: %s\n", principals);
1.386 djm 2778: } else {
2779: printf("Could not find matching principal.\n");
2780: }
2781: if (sigfd != -1)
2782: close(sigfd);
2783: sshbuf_free(sigbuf);
2784: sshbuf_free(abuf);
2785: sshkey_free(sign_key);
1.388 ! djm 2786: free(principals);
1.386 djm 2787: return ret;
2788: }
2789:
1.223 djm 2790: static void
1.376 djm 2791: do_moduli_gen(const char *out_file, char **opts, size_t nopts)
2792: {
2793: #ifdef WITH_OPENSSL
2794: /* Moduli generation/screening */
2795: u_int32_t memory = 0;
2796: BIGNUM *start = NULL;
2797: int moduli_bits = 0;
2798: FILE *out;
2799: size_t i;
2800: const char *errstr;
2801:
2802: /* Parse options */
2803: for (i = 0; i < nopts; i++) {
2804: if (strncmp(opts[i], "memory=", 7) == 0) {
2805: memory = (u_int32_t)strtonum(opts[i]+7, 1,
2806: UINT_MAX, &errstr);
2807: if (errstr) {
2808: fatal("Memory limit is %s: %s",
2809: errstr, opts[i]+7);
2810: }
2811: } else if (strncmp(opts[i], "start=", 6) == 0) {
2812: /* XXX - also compare length against bits */
2813: if (BN_hex2bn(&start, opts[i]+6) == 0)
2814: fatal("Invalid start point.");
2815: } else if (strncmp(opts[i], "bits=", 5) == 0) {
2816: moduli_bits = (int)strtonum(opts[i]+5, 1,
2817: INT_MAX, &errstr);
2818: if (errstr) {
2819: fatal("Invalid number: %s (%s)",
2820: opts[i]+12, errstr);
2821: }
2822: } else {
2823: fatal("Option \"%s\" is unsupported for moduli "
2824: "generation", opts[i]);
2825: }
2826: }
2827:
2828: if ((out = fopen(out_file, "w")) == NULL) {
2829: fatal("Couldn't open modulus candidate file \"%s\": %s",
2830: out_file, strerror(errno));
2831: }
2832: setvbuf(out, NULL, _IOLBF, 0);
2833:
2834: if (moduli_bits == 0)
2835: moduli_bits = DEFAULT_BITS;
2836: if (gen_candidates(out, memory, moduli_bits, start) != 0)
2837: fatal("modulus candidate generation failed");
2838: #else /* WITH_OPENSSL */
2839: fatal("Moduli generation is not supported");
2840: #endif /* WITH_OPENSSL */
2841: }
2842:
2843: static void
2844: do_moduli_screen(const char *out_file, char **opts, size_t nopts)
2845: {
2846: #ifdef WITH_OPENSSL
2847: /* Moduli generation/screening */
2848: char *checkpoint = NULL;
2849: u_int32_t generator_wanted = 0;
2850: unsigned long start_lineno = 0, lines_to_process = 0;
2851: int prime_tests = 0;
2852: FILE *out, *in = stdin;
2853: size_t i;
2854: const char *errstr;
2855:
2856: /* Parse options */
2857: for (i = 0; i < nopts; i++) {
2858: if (strncmp(opts[i], "lines=", 6) == 0) {
2859: lines_to_process = strtoul(opts[i]+6, NULL, 10);
2860: } else if (strncmp(opts[i], "start-line=", 11) == 0) {
2861: start_lineno = strtoul(opts[i]+11, NULL, 10);
2862: } else if (strncmp(opts[i], "checkpoint=", 11) == 0) {
2863: checkpoint = xstrdup(opts[i]+11);
2864: } else if (strncmp(opts[i], "generator=", 10) == 0) {
2865: generator_wanted = (u_int32_t)strtonum(
2866: opts[i]+10, 1, UINT_MAX, &errstr);
2867: if (errstr != NULL) {
2868: fatal("Generator invalid: %s (%s)",
2869: opts[i]+10, errstr);
2870: }
2871: } else if (strncmp(opts[i], "prime-tests=", 12) == 0) {
2872: prime_tests = (int)strtonum(opts[i]+12, 1,
2873: INT_MAX, &errstr);
2874: if (errstr) {
2875: fatal("Invalid number: %s (%s)",
2876: opts[i]+12, errstr);
2877: }
2878: } else {
2879: fatal("Option \"%s\" is unsupported for moduli "
2880: "screening", opts[i]);
2881: }
2882: }
2883:
2884: if (have_identity && strcmp(identity_file, "-") != 0) {
2885: if ((in = fopen(identity_file, "r")) == NULL) {
2886: fatal("Couldn't open modulus candidate "
2887: "file \"%s\": %s", identity_file,
2888: strerror(errno));
2889: }
2890: }
2891:
2892: if ((out = fopen(out_file, "a")) == NULL) {
2893: fatal("Couldn't open moduli file \"%s\": %s",
2894: out_file, strerror(errno));
2895: }
2896: setvbuf(out, NULL, _IOLBF, 0);
2897: if (prime_test(in, out, prime_tests == 0 ? 100 : prime_tests,
2898: generator_wanted, checkpoint,
2899: start_lineno, lines_to_process) != 0)
2900: fatal("modulus screening failed");
2901: #else /* WITH_OPENSSL */
2902: fatal("Moduli screening is not supported");
2903: #endif /* WITH_OPENSSL */
2904: }
2905:
1.381 djm 2906: static char *
2907: private_key_passphrase(void)
2908: {
2909: char *passphrase1, *passphrase2;
2910:
2911: /* Ask for a passphrase (twice). */
2912: if (identity_passphrase)
2913: passphrase1 = xstrdup(identity_passphrase);
2914: else if (identity_new_passphrase)
2915: passphrase1 = xstrdup(identity_new_passphrase);
2916: else {
2917: passphrase_again:
2918: passphrase1 =
2919: read_passphrase("Enter passphrase (empty for no "
2920: "passphrase): ", RP_ALLOW_STDIN);
2921: passphrase2 = read_passphrase("Enter same passphrase again: ",
2922: RP_ALLOW_STDIN);
2923: if (strcmp(passphrase1, passphrase2) != 0) {
2924: /*
2925: * The passphrases do not match. Clear them and
2926: * retry.
2927: */
2928: freezero(passphrase1, strlen(passphrase1));
2929: freezero(passphrase2, strlen(passphrase2));
2930: printf("Passphrases do not match. Try again.\n");
2931: goto passphrase_again;
2932: }
2933: /* Clear the other copy of the passphrase. */
2934: freezero(passphrase2, strlen(passphrase2));
2935: }
2936: return passphrase1;
2937: }
2938:
2939: static const char *
2940: skip_ssh_url_preamble(const char *s)
2941: {
2942: if (strncmp(s, "ssh://", 6) == 0)
2943: return s + 6;
2944: else if (strncmp(s, "ssh:", 4) == 0)
2945: return s + 4;
2946: return s;
2947: }
2948:
2949: static int
1.382 djm 2950: do_download_sk(const char *skprovider, const char *device)
1.381 djm 2951: {
2952: struct sshkey **keys;
2953: size_t nkeys, i;
2954: int r, ok = -1;
2955: char *fp, *pin, *pass = NULL, *path, *pubpath;
2956: const char *ext;
2957:
2958: if (skprovider == NULL)
2959: fatal("Cannot download keys without provider");
2960:
2961: pin = read_passphrase("Enter PIN for security key: ", RP_ALLOW_STDIN);
1.382 djm 2962: if ((r = sshsk_load_resident(skprovider, device, pin,
2963: &keys, &nkeys)) != 0) {
1.381 djm 2964: freezero(pin, strlen(pin));
2965: error("Unable to load resident keys: %s", ssh_err(r));
2966: return -1;
2967: }
2968: if (nkeys == 0)
2969: logit("No keys to download");
2970: freezero(pin, strlen(pin));
2971:
2972: for (i = 0; i < nkeys; i++) {
2973: if (keys[i]->type != KEY_ECDSA_SK &&
2974: keys[i]->type != KEY_ED25519_SK) {
2975: error("Unsupported key type %s (%d)",
2976: sshkey_type(keys[i]), keys[i]->type);
2977: continue;
2978: }
2979: if ((fp = sshkey_fingerprint(keys[i],
2980: fingerprint_hash, SSH_FP_DEFAULT)) == NULL)
2981: fatal("%s: sshkey_fingerprint failed", __func__);
2982: debug("%s: key %zu: %s %s %s (flags 0x%02x)", __func__, i,
2983: sshkey_type(keys[i]), fp, keys[i]->sk_application,
2984: keys[i]->sk_flags);
2985: ext = skip_ssh_url_preamble(keys[i]->sk_application);
2986: xasprintf(&path, "id_%s_rk%s%s",
2987: keys[i]->type == KEY_ECDSA_SK ? "ecdsa_sk" : "ed25519_sk",
2988: *ext == '\0' ? "" : "_", ext);
2989:
2990: /* If the file already exists, ask the user to confirm. */
2991: if (!confirm_overwrite(path)) {
2992: free(path);
2993: break;
2994: }
2995:
2996: /* Save the key with the application string as the comment */
2997: if (pass == NULL)
2998: pass = private_key_passphrase();
2999: if ((r = sshkey_save_private(keys[i], path, pass,
3000: keys[i]->sk_application, private_key_format,
3001: openssh_format_cipher, rounds)) != 0) {
3002: error("Saving key \"%s\" failed: %s",
3003: path, ssh_err(r));
3004: free(path);
3005: break;
3006: }
3007: if (!quiet) {
3008: printf("Saved %s key%s%s to %s\n",
3009: sshkey_type(keys[i]),
3010: *ext != '\0' ? " " : "",
3011: *ext != '\0' ? keys[i]->sk_application : "",
3012: path);
3013: }
3014:
3015: /* Save public key too */
3016: xasprintf(&pubpath, "%s.pub", path);
3017: free(path);
3018: if ((r = sshkey_save_public(keys[i], pubpath,
3019: keys[i]->sk_application)) != 0) {
3020: free(pubpath);
3021: error("Saving public key \"%s\" failed: %s",
3022: pubpath, ssh_err(r));
3023: break;
3024: }
3025: free(pubpath);
3026: }
3027:
3028: if (i >= nkeys)
3029: ok = 0; /* success */
3030: if (pass != NULL)
3031: freezero(pass, strlen(pass));
3032: for (i = 0; i < nkeys; i++)
3033: sshkey_free(keys[i]);
3034: free(keys);
3035: return ok ? 0 : -1;
3036: }
3037:
1.376 djm 3038: static void
1.10 markus 3039: usage(void)
3040: {
1.243 deraadt 3041: fprintf(stderr,
1.355 jmc 3042: "usage: ssh-keygen [-q] [-b bits] [-C comment] [-f output_keyfile] [-m format]\n"
1.369 naddy 3043: " [-t dsa | ecdsa | ecdsa-sk | ed25519 | ed25519-sk | rsa]\n"
1.383 naddy 3044: " [-N new_passphrase] [-O option] [-w provider]\n"
1.355 jmc 3045: " ssh-keygen -p [-f keyfile] [-m format] [-N new_passphrase]\n"
3046: " [-P old_passphrase]\n"
3047: " ssh-keygen -i [-f input_keyfile] [-m key_format]\n"
3048: " ssh-keygen -e [-f input_keyfile] [-m key_format]\n"
1.243 deraadt 3049: " ssh-keygen -y [-f input_keyfile]\n"
1.355 jmc 3050: " ssh-keygen -c [-C comment] [-f keyfile] [-P passphrase]\n"
1.265 naddy 3051: " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n"
1.302 djm 3052: " ssh-keygen -B [-f input_keyfile]\n");
1.177 markus 3053: #ifdef ENABLE_PKCS11
1.243 deraadt 3054: fprintf(stderr,
3055: " ssh-keygen -D pkcs11\n");
1.177 markus 3056: #endif
1.243 deraadt 3057: fprintf(stderr,
1.352 jmc 3058: " ssh-keygen -F hostname [-lv] [-f known_hosts_file]\n"
1.243 deraadt 3059: " ssh-keygen -H [-f known_hosts_file]\n"
1.383 naddy 3060: " ssh-keygen -K [-w provider]\n"
1.243 deraadt 3061: " ssh-keygen -R hostname [-f known_hosts_file]\n"
1.352 jmc 3062: " ssh-keygen -r hostname [-g] [-f input_keyfile]\n"
1.274 djm 3063: #ifdef WITH_OPENSSL
1.383 naddy 3064: " ssh-keygen -M generate [-O option] output_file\n"
3065: " ssh-keygen -M screen [-f input_file] [-O option] output_file\n"
1.274 djm 3066: #endif
1.355 jmc 3067: " ssh-keygen -I certificate_identity -s ca_key [-hU] [-D pkcs11_provider]\n"
3068: " [-n principals] [-O option] [-V validity_interval]\n"
3069: " [-z serial_number] file ...\n"
1.243 deraadt 3070: " ssh-keygen -L [-f input_keyfile]\n"
1.355 jmc 3071: " ssh-keygen -A [-f prefix_path]\n"
1.243 deraadt 3072: " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n"
3073: " file ...\n"
1.346 naddy 3074: " ssh-keygen -Q -f krl_file file ...\n"
1.388 ! djm 3075: " ssh-keygen -Y find-principals -s signature_file -f allowed_signers_file\n"
1.355 jmc 3076: " ssh-keygen -Y check-novalidate -n namespace -s signature_file\n"
3077: " ssh-keygen -Y sign -f key_file -n namespace file ...\n"
3078: " ssh-keygen -Y verify -f allowed_signers_file -I signer_identity\n"
3079: " -n namespace -s signature_file [-r revocation_file]\n");
1.12 markus 3080: exit(1);
1.10 markus 3081: }
3082:
1.13 deraadt 3083: /*
3084: * Main program for key management.
3085: */
1.2 provos 3086: int
1.156 deraadt 3087: main(int argc, char **argv)
1.1 deraadt 3088: {
1.381 djm 3089: char dotsshdir[PATH_MAX], comment[1024], *passphrase;
1.274 djm 3090: char *rr_hostname = NULL, *ep, *fp, *ra;
1.252 djm 3091: struct sshkey *private, *public;
1.12 markus 3092: struct passwd *pw;
3093: struct stat st;
1.381 djm 3094: int r, opt, type;
1.325 djm 3095: int change_passphrase = 0, change_comment = 0, show_cert = 0;
3096: int find_host = 0, delete_host = 0, hash_hosts = 0;
1.274 djm 3097: int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0;
1.325 djm 3098: int prefer_agent = 0, convert_to = 0, convert_from = 0;
1.326 djm 3099: int print_public = 0, print_generic = 0, cert_serial_autoinc = 0;
1.381 djm 3100: int do_gen_candidates = 0, do_screen_candidates = 0, download_sk = 0;
1.380 djm 3101: unsigned long long cert_serial = 0;
1.375 djm 3102: char *identity_comment = NULL, *ca_key_path = NULL, **opts = NULL;
1.382 djm 3103: char *sk_application = NULL, *sk_device = NULL, *sk_user = NULL;
1.375 djm 3104: size_t i, nopts = 0;
1.340 dtucker 3105: u_int32_t bits = 0;
1.357 djm 3106: uint8_t sk_flags = SSH_SK_USER_PRESENCE_REQD;
1.274 djm 3107: const char *errstr;
1.325 djm 3108: int log_level = SYSLOG_LEVEL_INFO;
1.344 djm 3109: char *sign_op = NULL;
1.33 markus 3110:
1.12 markus 3111: extern int optind;
3112: extern char *optarg;
1.129 djm 3113:
3114: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
3115: sanitise_stdfd();
1.12 markus 3116:
1.348 djm 3117: #ifdef WITH_OPENSSL
1.201 djm 3118: OpenSSL_add_all_algorithms();
1.348 djm 3119: #endif
1.156 deraadt 3120: log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1);
1.294 djm 3121:
3122: setlocale(LC_CTYPE, "");
1.19 markus 3123:
1.14 markus 3124: /* we need this for the home * directory. */
1.12 markus 3125: pw = getpwuid(getuid());
1.269 djm 3126: if (!pw)
3127: fatal("No user exists for uid %lu", (u_long)getuid());
1.333 deraadt 3128: if (gethostname(hostname, sizeof(hostname)) == -1)
1.269 djm 3129: fatal("gethostname: %s", strerror(errno));
1.14 markus 3130:
1.357 djm 3131: sk_provider = getenv("SSH_SK_PROVIDER");
3132:
1.381 djm 3133: /* Remaining characters: dGjJSTWx */
3134: while ((opt = getopt(argc, argv, "ABHKLQUXceghiklopquvy"
1.376 djm 3135: "C:D:E:F:I:M:N:O:P:R:V:Y:Z:"
1.380 djm 3136: "a:b:f:g:m:n:r:s:t:w:z:")) != -1) {
1.12 markus 3137: switch (opt) {
1.206 stevesk 3138: case 'A':
3139: gen_all_hostkeys = 1;
3140: break;
1.12 markus 3141: case 'b':
1.340 dtucker 3142: bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX,
3143: &errstr);
1.125 avsm 3144: if (errstr)
3145: fatal("Bits has bad value %s (%s)",
3146: optarg, errstr);
1.12 markus 3147: break;
1.251 djm 3148: case 'E':
3149: fingerprint_hash = ssh_digest_alg_by_name(optarg);
3150: if (fingerprint_hash == -1)
3151: fatal("Invalid hash algorithm \"%s\"", optarg);
3152: break;
1.119 djm 3153: case 'F':
3154: find_host = 1;
3155: rr_hostname = optarg;
3156: break;
3157: case 'H':
3158: hash_hosts = 1;
3159: break;
1.179 djm 3160: case 'I':
3161: cert_key_id = optarg;
3162: break;
1.119 djm 3163: case 'R':
3164: delete_host = 1;
3165: rr_hostname = optarg;
3166: break;
1.182 djm 3167: case 'L':
3168: show_cert = 1;
3169: break;
1.12 markus 3170: case 'l':
3171: print_fingerprint = 1;
3172: break;
1.49 markus 3173: case 'B':
3174: print_bubblebabble = 1;
3175: break;
1.193 djm 3176: case 'm':
3177: if (strcasecmp(optarg, "RFC4716") == 0 ||
3178: strcasecmp(optarg, "ssh2") == 0) {
3179: convert_format = FMT_RFC4716;
3180: break;
3181: }
3182: if (strcasecmp(optarg, "PKCS8") == 0) {
3183: convert_format = FMT_PKCS8;
1.336 djm 3184: private_key_format = SSHKEY_PRIVATE_PKCS8;
1.193 djm 3185: break;
3186: }
3187: if (strcasecmp(optarg, "PEM") == 0) {
3188: convert_format = FMT_PEM;
1.336 djm 3189: private_key_format = SSHKEY_PRIVATE_PEM;
1.193 djm 3190: break;
3191: }
3192: fatal("Unsupported conversion format \"%s\"", optarg);
1.179 djm 3193: case 'n':
3194: cert_principals = optarg;
3195: break;
1.237 markus 3196: case 'o':
1.319 djm 3197: /* no-op; new format is already the default */
1.237 markus 3198: break;
1.12 markus 3199: case 'p':
3200: change_passphrase = 1;
3201: break;
3202: case 'c':
3203: change_comment = 1;
3204: break;
3205: case 'f':
1.274 djm 3206: if (strlcpy(identity_file, optarg,
3207: sizeof(identity_file)) >= sizeof(identity_file))
1.124 avsm 3208: fatal("Identity filename too long");
1.12 markus 3209: have_identity = 1;
3210: break;
1.105 jakob 3211: case 'g':
3212: print_generic = 1;
3213: break;
1.381 djm 3214: case 'K':
3215: download_sk = 1;
3216: break;
1.12 markus 3217: case 'P':
3218: identity_passphrase = optarg;
3219: break;
3220: case 'N':
3221: identity_new_passphrase = optarg;
3222: break;
1.223 djm 3223: case 'Q':
3224: check_krl = 1;
3225: break;
1.179 djm 3226: case 'O':
1.375 djm 3227: opts = xrecallocarray(opts, nopts, nopts + 1,
3228: sizeof(*opts));
3229: opts[nopts++] = xstrdup(optarg);
1.179 djm 3230: break;
1.237 markus 3231: case 'Z':
1.336 djm 3232: openssh_format_cipher = optarg;
1.237 markus 3233: break;
1.12 markus 3234: case 'C':
3235: identity_comment = optarg;
3236: break;
3237: case 'q':
3238: quiet = 1;
1.20 deraadt 3239: break;
1.57 markus 3240: case 'e':
3241: /* export key */
1.193 djm 3242: convert_to = 1;
1.19 markus 3243: break;
1.179 djm 3244: case 'h':
3245: cert_key_type = SSH2_CERT_TYPE_HOST;
1.190 djm 3246: certflags_flags = 0;
1.179 djm 3247: break;
1.223 djm 3248: case 'k':
3249: gen_krl = 1;
3250: break;
1.57 markus 3251: case 'i':
1.19 markus 3252: case 'X':
1.57 markus 3253: /* import key */
1.193 djm 3254: convert_from = 1;
1.19 markus 3255: break;
3256: case 'y':
3257: print_public = 1;
3258: break;
1.179 djm 3259: case 's':
3260: ca_key_path = optarg;
3261: break;
1.33 markus 3262: case 't':
3263: key_type_name = optarg;
3264: break;
1.75 markus 3265: case 'D':
1.177 markus 3266: pkcs11provider = optarg;
1.305 djm 3267: break;
3268: case 'U':
3269: prefer_agent = 1;
1.66 markus 3270: break;
1.223 djm 3271: case 'u':
3272: update_krl = 1;
3273: break;
1.113 djm 3274: case 'v':
3275: if (log_level == SYSLOG_LEVEL_INFO)
3276: log_level = SYSLOG_LEVEL_DEBUG1;
3277: else {
1.117 deraadt 3278: if (log_level >= SYSLOG_LEVEL_DEBUG1 &&
1.113 djm 3279: log_level < SYSLOG_LEVEL_DEBUG3)
3280: log_level++;
3281: }
3282: break;
1.105 jakob 3283: case 'r':
1.119 djm 3284: rr_hostname = optarg;
1.105 jakob 3285: break;
1.107 djm 3286: case 'a':
1.237 markus 3287: rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr);
1.124 avsm 3288: if (errstr)
1.237 markus 3289: fatal("Invalid number: %s (%s)",
1.124 avsm 3290: optarg, errstr);
1.107 djm 3291: break;
1.274 djm 3292: case 'V':
3293: parse_cert_times(optarg);
3294: break;
1.344 djm 3295: case 'Y':
3296: sign_op = optarg;
1.365 djm 3297: break;
1.357 djm 3298: case 'w':
3299: sk_provider = optarg;
3300: break;
1.274 djm 3301: case 'z':
3302: errno = 0;
1.326 djm 3303: if (*optarg == '+') {
3304: cert_serial_autoinc = 1;
3305: optarg++;
3306: }
1.274 djm 3307: cert_serial = strtoull(optarg, &ep, 10);
3308: if (*optarg < '0' || *optarg > '9' || *ep != '\0' ||
3309: (errno == ERANGE && cert_serial == ULLONG_MAX))
3310: fatal("Invalid serial number \"%s\"", optarg);
1.107 djm 3311: break;
1.274 djm 3312: case 'M':
1.376 djm 3313: if (strcmp(optarg, "generate") == 0)
3314: do_gen_candidates = 1;
3315: else if (strcmp(optarg, "screen") == 0)
3316: do_screen_candidates = 1;
3317: else
3318: fatal("Unsupported moduli option %s", optarg);
1.179 djm 3319: break;
1.12 markus 3320: case '?':
3321: default:
3322: usage();
3323: }
3324: }
1.364 djm 3325:
3326: if (sk_provider == NULL)
3327: sk_provider = "internal";
1.113 djm 3328:
3329: /* reinit */
1.156 deraadt 3330: log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1);
1.113 djm 3331:
1.179 djm 3332: argv += optind;
3333: argc -= optind;
1.344 djm 3334:
3335: if (sign_op != NULL) {
1.388 ! djm 3336: if (strncmp(sign_op, "find-principals", 15) == 0) {
1.386 djm 3337: if (ca_key_path == NULL) {
1.388 ! djm 3338: error("Too few arguments for find-principals:"
1.386 djm 3339: "missing signature file");
3340: exit(1);
3341: }
3342: if (!have_identity) {
1.388 ! djm 3343: error("Too few arguments for find-principals:"
1.386 djm 3344: "missing allowed keys file");
3345: exit(1);
3346: }
1.388 ! djm 3347: return sig_find_principals(ca_key_path, identity_file);
1.386 djm 3348: }
1.354 djm 3349: if (cert_principals == NULL || *cert_principals == '\0') {
1.344 djm 3350: error("Too few arguments for sign/verify: "
3351: "missing namespace");
3352: exit(1);
3353: }
3354: if (strncmp(sign_op, "sign", 4) == 0) {
3355: if (!have_identity) {
3356: error("Too few arguments for sign: "
3357: "missing key");
3358: exit(1);
3359: }
1.386 djm 3360: return sig_sign(identity_file, cert_principals,
3361: argc, argv);
1.350 djm 3362: } else if (strncmp(sign_op, "check-novalidate", 16) == 0) {
3363: if (ca_key_path == NULL) {
3364: error("Too few arguments for check-novalidate: "
3365: "missing signature file");
3366: exit(1);
3367: }
1.386 djm 3368: return sig_verify(ca_key_path, cert_principals,
3369: NULL, NULL, NULL);
1.344 djm 3370: } else if (strncmp(sign_op, "verify", 6) == 0) {
3371: if (ca_key_path == NULL) {
3372: error("Too few arguments for verify: "
3373: "missing signature file");
3374: exit(1);
3375: }
3376: if (!have_identity) {
3377: error("Too few arguments for sign: "
3378: "missing allowed keys file");
3379: exit(1);
3380: }
3381: if (cert_key_id == NULL) {
3382: error("Too few arguments for verify: "
3383: "missing principal ID");
3384: exit(1);
3385: }
1.386 djm 3386: return sig_verify(ca_key_path, cert_principals,
1.344 djm 3387: cert_key_id, identity_file, rr_hostname);
3388: }
3389: usage();
3390: /* NOTREACHED */
3391: }
1.179 djm 3392:
3393: if (ca_key_path != NULL) {
1.223 djm 3394: if (argc < 1 && !gen_krl) {
1.269 djm 3395: error("Too few arguments.");
1.179 djm 3396: usage();
3397: }
1.376 djm 3398: } else if (argc > 0 && !gen_krl && !check_krl &&
3399: !do_gen_candidates && !do_screen_candidates) {
1.269 djm 3400: error("Too many arguments.");
1.87 djm 3401: usage();
3402: }
1.12 markus 3403: if (change_passphrase && change_comment) {
1.269 djm 3404: error("Can only have one of -p and -c.");
1.166 djm 3405: usage();
3406: }
3407: if (print_fingerprint && (delete_host || hash_hosts)) {
1.269 djm 3408: error("Cannot use -l with -H or -R.");
1.12 markus 3409: usage();
1.223 djm 3410: }
1.376 djm 3411: if (gen_krl) {
1.325 djm 3412: do_gen_krl(pw, update_krl, ca_key_path,
3413: cert_serial, identity_comment, argc, argv);
1.223 djm 3414: return (0);
3415: }
3416: if (check_krl) {
3417: do_check_krl(pw, argc, argv);
3418: return (0);
1.179 djm 3419: }
3420: if (ca_key_path != NULL) {
3421: if (cert_key_id == NULL)
3422: fatal("Must specify key id (-I) when certifying");
1.375 djm 3423: for (i = 0; i < nopts; i++)
3424: add_cert_option(opts[i]);
1.326 djm 3425: do_ca_sign(pw, ca_key_path, prefer_agent,
3426: cert_serial, cert_serial_autoinc, argc, argv);
1.12 markus 3427: }
1.182 djm 3428: if (show_cert)
3429: do_show_cert(pw);
1.325 djm 3430: if (delete_host || hash_hosts || find_host) {
3431: do_known_hosts(pw, rr_hostname, find_host,
3432: delete_host, hash_hosts);
3433: }
1.221 djm 3434: if (pkcs11provider != NULL)
3435: do_download(pw);
1.382 djm 3436: if (download_sk) {
3437: for (i = 0; i < nopts; i++) {
3438: if (strncasecmp(opts[i], "device=", 7) == 0) {
3439: sk_device = xstrdup(opts[i] + 7);
3440: } else {
3441: fatal("Option \"%s\" is unsupported for "
3442: "FIDO authenticator download", opts[i]);
3443: }
3444: }
3445: return do_download_sk(sk_provider, sk_device);
3446: }
1.49 markus 3447: if (print_fingerprint || print_bubblebabble)
1.12 markus 3448: do_fingerprint(pw);
3449: if (change_passphrase)
3450: do_change_passphrase(pw);
3451: if (change_comment)
1.325 djm 3452: do_change_comment(pw, identity_comment);
1.246 markus 3453: #ifdef WITH_OPENSSL
1.193 djm 3454: if (convert_to)
3455: do_convert_to(pw);
3456: if (convert_from)
3457: do_convert_from(pw);
1.349 djm 3458: #else /* WITH_OPENSSL */
3459: if (convert_to || convert_from)
3460: fatal("key conversion disabled at compile time");
3461: #endif /* WITH_OPENSSL */
1.19 markus 3462: if (print_public)
3463: do_print_public(pw);
1.119 djm 3464: if (rr_hostname != NULL) {
1.138 jakob 3465: unsigned int n = 0;
3466:
3467: if (have_identity) {
1.325 djm 3468: n = do_print_resource_record(pw, identity_file,
3469: rr_hostname, print_generic);
1.269 djm 3470: if (n == 0)
3471: fatal("%s: %s", identity_file, strerror(errno));
1.138 jakob 3472: exit(0);
3473: } else {
3474:
3475: n += do_print_resource_record(pw,
1.325 djm 3476: _PATH_HOST_RSA_KEY_FILE, rr_hostname,
3477: print_generic);
1.138 jakob 3478: n += do_print_resource_record(pw,
1.325 djm 3479: _PATH_HOST_DSA_KEY_FILE, rr_hostname,
3480: print_generic);
1.214 djm 3481: n += do_print_resource_record(pw,
1.325 djm 3482: _PATH_HOST_ECDSA_KEY_FILE, rr_hostname,
3483: print_generic);
1.244 logan 3484: n += do_print_resource_record(pw,
1.325 djm 3485: _PATH_HOST_ED25519_KEY_FILE, rr_hostname,
3486: print_generic);
1.313 markus 3487: n += do_print_resource_record(pw,
1.325 djm 3488: _PATH_HOST_XMSS_KEY_FILE, rr_hostname,
3489: print_generic);
1.138 jakob 3490: if (n == 0)
3491: fatal("no keys found.");
3492: exit(0);
3493: }
1.105 jakob 3494: }
1.107 djm 3495:
1.376 djm 3496: if (do_gen_candidates || do_screen_candidates) {
3497: if (argc <= 0)
3498: fatal("No output file specified");
3499: else if (argc > 1)
3500: fatal("Too many output files specified");
3501: }
1.107 djm 3502: if (do_gen_candidates) {
1.376 djm 3503: do_moduli_gen(argv[0], opts, nopts);
3504: return 0;
1.107 djm 3505: }
3506: if (do_screen_candidates) {
1.376 djm 3507: do_moduli_screen(argv[0], opts, nopts);
3508: return 0;
1.75 markus 3509: }
1.12 markus 3510:
1.206 stevesk 3511: if (gen_all_hostkeys) {
3512: do_gen_all_hostkeys(pw);
3513: return (0);
3514: }
3515:
1.133 djm 3516: if (key_type_name == NULL)
1.273 djm 3517: key_type_name = DEFAULT_KEY_TYPE_NAME;
1.133 djm 3518:
1.252 djm 3519: type = sshkey_type_from_name(key_type_name);
1.255 djm 3520: type_bits_valid(type, key_type_name, &bits);
1.206 stevesk 3521:
1.33 markus 3522: if (!quiet)
1.252 djm 3523: printf("Generating public/private %s key pair.\n",
3524: key_type_name);
1.362 markus 3525: switch (type) {
3526: case KEY_ECDSA_SK:
3527: case KEY_ED25519_SK:
1.380 djm 3528: for (i = 0; i < nopts; i++) {
3529: if (strcasecmp(opts[i], "no-touch-required") == 0) {
3530: sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
3531: } else if (strcasecmp(opts[i], "resident") == 0) {
3532: sk_flags |= SSH_SK_RESIDENT_KEY;
1.382 djm 3533: } else if (strncasecmp(opts[i], "device=", 7) == 0) {
3534: sk_device = xstrdup(opts[i] + 7);
3535: } else if (strncasecmp(opts[i], "user=", 5) == 0) {
3536: sk_user = xstrdup(opts[i] + 5);
3537: } else if (strncasecmp(opts[i],
3538: "application=", 12) == 0) {
3539: sk_application = xstrdup(opts[i] + 12);
1.380 djm 3540: } else {
3541: fatal("Option \"%s\" is unsupported for "
3542: "FIDO authenticator enrollment", opts[i]);
3543: }
3544: }
3545: if (!quiet) {
3546: printf("You may need to touch your security key "
3547: "to authorize key generation.\n");
3548: }
1.381 djm 3549: passphrase = NULL;
1.379 djm 3550: for (i = 0 ; i < 3; i++) {
3551: fflush(stdout);
1.382 djm 3552: r = sshsk_enroll(type, sk_provider, sk_device,
3553: sk_application == NULL ? "ssh:" : sk_application,
3554: sk_user, sk_flags, passphrase, NULL,
3555: &private, NULL);
1.379 djm 3556: if (r == 0)
3557: break;
3558: if (r != SSH_ERR_KEY_WRONG_PASSPHRASE)
3559: exit(1); /* error message already printed */
1.381 djm 3560: if (passphrase != NULL)
3561: freezero(passphrase, strlen(passphrase));
3562: passphrase = read_passphrase("Enter PIN for security "
1.379 djm 3563: "key: ", RP_ALLOW_STDIN);
1.373 djm 3564: }
1.381 djm 3565: if (passphrase != NULL)
3566: freezero(passphrase, strlen(passphrase));
1.379 djm 3567: if (i > 3)
3568: fatal("Too many incorrect PINs");
1.362 markus 3569: break;
3570: default:
3571: if ((r = sshkey_generate(type, bits, &private)) != 0)
3572: fatal("sshkey_generate failed");
3573: break;
3574: }
1.269 djm 3575: if ((r = sshkey_from_private(private, &public)) != 0)
1.304 markus 3576: fatal("sshkey_from_private failed: %s\n", ssh_err(r));
1.12 markus 3577:
3578: if (!have_identity)
3579: ask_filename(pw, "Enter file in which to save the key");
3580:
1.132 djm 3581: /* Create ~/.ssh directory if it doesn't already exist. */
1.188 djm 3582: snprintf(dotsshdir, sizeof dotsshdir, "%s/%s",
3583: pw->pw_dir, _PATH_SSH_USER_DIR);
3584: if (strstr(identity_file, dotsshdir) != NULL) {
1.333 deraadt 3585: if (stat(dotsshdir, &st) == -1) {
1.188 djm 3586: if (errno != ENOENT) {
3587: error("Could not stat %s: %s", dotsshdir,
3588: strerror(errno));
1.333 deraadt 3589: } else if (mkdir(dotsshdir, 0700) == -1) {
1.188 djm 3590: error("Could not create directory '%s': %s",
3591: dotsshdir, strerror(errno));
3592: } else if (!quiet)
3593: printf("Created directory '%s'.\n", dotsshdir);
3594: }
1.12 markus 3595: }
3596: /* If the file already exists, ask the user to confirm. */
1.343 djm 3597: if (!confirm_overwrite(identity_file))
3598: exit(1);
1.12 markus 3599:
1.381 djm 3600: /* Determine the passphrase for the private key */
3601: passphrase = private_key_passphrase();
1.12 markus 3602: if (identity_comment) {
3603: strlcpy(comment, identity_comment, sizeof(comment));
3604: } else {
1.172 stevesk 3605: /* Create default comment field for the passphrase. */
1.12 markus 3606: snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
3607: }
3608:
3609: /* Save the key with the given passphrase and comment. */
1.381 djm 3610: if ((r = sshkey_save_private(private, identity_file, passphrase,
1.336 djm 3611: comment, private_key_format, openssh_format_cipher, rounds)) != 0) {
1.269 djm 3612: error("Saving key \"%s\" failed: %s",
1.252 djm 3613: identity_file, ssh_err(r));
1.381 djm 3614: freezero(passphrase, strlen(passphrase));
1.12 markus 3615: exit(1);
3616: }
1.381 djm 3617: freezero(passphrase, strlen(passphrase));
1.252 djm 3618: sshkey_free(private);
1.12 markus 3619:
1.381 djm 3620: if (!quiet) {
1.387 djm 3621: printf("Your identification has been saved in %s\n",
1.381 djm 3622: identity_file);
3623: }
1.12 markus 3624:
3625: strlcat(identity_file, ".pub", sizeof(identity_file));
1.381 djm 3626: if ((r = sshkey_save_public(public, identity_file, comment)) != 0) {
1.269 djm 3627: fatal("Unable to save public key to %s: %s",
3628: identity_file, strerror(errno));
1.381 djm 3629: }
1.12 markus 3630:
3631: if (!quiet) {
1.259 djm 3632: fp = sshkey_fingerprint(public, fingerprint_hash,
1.251 djm 3633: SSH_FP_DEFAULT);
1.259 djm 3634: ra = sshkey_fingerprint(public, fingerprint_hash,
1.167 grunk 3635: SSH_FP_RANDOMART);
1.259 djm 3636: if (fp == NULL || ra == NULL)
3637: fatal("sshkey_fingerprint failed");
1.387 djm 3638: printf("Your public key has been saved in %s\n",
1.19 markus 3639: identity_file);
1.12 markus 3640: printf("The key fingerprint is:\n");
1.50 markus 3641: printf("%s %s\n", fp, comment);
1.167 grunk 3642: printf("The key's randomart image is:\n");
3643: printf("%s\n", ra);
1.227 djm 3644: free(ra);
3645: free(fp);
1.12 markus 3646: }
1.19 markus 3647:
1.252 djm 3648: sshkey_free(public);
1.12 markus 3649: exit(0);
1.1 deraadt 3650: }
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