| /* $OpenBSD: ssh-keygen.c,v 1.344 2019/09/03 08:34:19 djm Exp $ */ |
| /* |
| * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| * All rights reserved |
| * Identity and host key generation and maintenance. |
| * |
| * As far as I am concerned, the code I have written for this software |
| * can be used freely for any purpose. Any derived versions of this |
| * software must be clearly marked as such, and if the derived work is |
| * incompatible with the protocol description in the RFC file, it must be |
| * called by a name other than "ssh" or "Secure Shell". |
| */ |
| |
| #include "includes.h" |
| |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| |
| #ifdef WITH_OPENSSL |
| #include <openssl/evp.h> |
| #include <openssl/pem.h> |
| #include "openbsd-compat/openssl-compat.h" |
| #endif |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <netdb.h> |
| #ifdef HAVE_PATHS_H |
| # include <paths.h> |
| #endif |
| #include <pwd.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <limits.h> |
| #include <locale.h> |
| #include <time.h> |
| |
| #include "xmalloc.h" |
| #include "sshkey.h" |
| #include "authfile.h" |
| #include "sshbuf.h" |
| #include "pathnames.h" |
| #include "log.h" |
| #include "misc.h" |
| #include "match.h" |
| #include "hostfile.h" |
| #include "dns.h" |
| #include "ssh.h" |
| #include "ssh2.h" |
| #include "ssherr.h" |
| #include "ssh-pkcs11.h" |
| #include "atomicio.h" |
| #include "krl.h" |
| #include "digest.h" |
| #include "utf8.h" |
| #include "authfd.h" |
| #include "sshsig.h" |
| |
| #ifdef WITH_OPENSSL |
| # define DEFAULT_KEY_TYPE_NAME "rsa" |
| #else |
| # define DEFAULT_KEY_TYPE_NAME "ed25519" |
| #endif |
| |
| /* |
| * Default number of bits in the RSA, DSA and ECDSA keys. These value can be |
| * overridden on the command line. |
| * |
| * These values, with the exception of DSA, provide security equivalent to at |
| * least 128 bits of security according to NIST Special Publication 800-57: |
| * Recommendation for Key Management Part 1 rev 4 section 5.6.1. |
| * For DSA it (and FIPS-186-4 section 4.2) specifies that the only size for |
| * which a 160bit hash is acceptable is 1kbit, and since ssh-dss specifies only |
| * SHA1 we limit the DSA key size 1k bits. |
| */ |
| #define DEFAULT_BITS 3072 |
| #define DEFAULT_BITS_DSA 1024 |
| #define DEFAULT_BITS_ECDSA 256 |
| |
| static int quiet = 0; |
| |
| /* Flag indicating that we just want to see the key fingerprint */ |
| static int print_fingerprint = 0; |
| static int print_bubblebabble = 0; |
| |
| /* Hash algorithm to use for fingerprints. */ |
| static int fingerprint_hash = SSH_FP_HASH_DEFAULT; |
| |
| /* The identity file name, given on the command line or entered by the user. */ |
| static char identity_file[1024]; |
| static int have_identity = 0; |
| |
| /* This is set to the passphrase if given on the command line. */ |
| static char *identity_passphrase = NULL; |
| |
| /* This is set to the new passphrase if given on the command line. */ |
| static char *identity_new_passphrase = NULL; |
| |
| /* Key type when certifying */ |
| static u_int cert_key_type = SSH2_CERT_TYPE_USER; |
| |
| /* "key ID" of signed key */ |
| static char *cert_key_id = NULL; |
| |
| /* Comma-separated list of principal names for certifying keys */ |
| static char *cert_principals = NULL; |
| |
| /* Validity period for certificates */ |
| static u_int64_t cert_valid_from = 0; |
| static u_int64_t cert_valid_to = ~0ULL; |
| |
| /* Certificate options */ |
| #define CERTOPT_X_FWD (1) |
| #define CERTOPT_AGENT_FWD (1<<1) |
| #define CERTOPT_PORT_FWD (1<<2) |
| #define CERTOPT_PTY (1<<3) |
| #define CERTOPT_USER_RC (1<<4) |
| #define CERTOPT_DEFAULT (CERTOPT_X_FWD|CERTOPT_AGENT_FWD| \ |
| CERTOPT_PORT_FWD|CERTOPT_PTY|CERTOPT_USER_RC) |
| static u_int32_t certflags_flags = CERTOPT_DEFAULT; |
| static char *certflags_command = NULL; |
| static char *certflags_src_addr = NULL; |
| |
| /* Arbitrary extensions specified by user */ |
| struct cert_userext { |
| char *key; |
| char *val; |
| int crit; |
| }; |
| static struct cert_userext *cert_userext; |
| static size_t ncert_userext; |
| |
| /* Conversion to/from various formats */ |
| enum { |
| FMT_RFC4716, |
| FMT_PKCS8, |
| FMT_PEM |
| } convert_format = FMT_RFC4716; |
| |
| static char *key_type_name = NULL; |
| |
| /* Load key from this PKCS#11 provider */ |
| static char *pkcs11provider = NULL; |
| |
| /* Format for writing private keys */ |
| static int private_key_format = SSHKEY_PRIVATE_OPENSSH; |
| |
| /* Cipher for new-format private keys */ |
| static char *openssh_format_cipher = NULL; |
| |
| /* |
| * Number of KDF rounds to derive new format keys / |
| * number of primality trials when screening moduli. |
| */ |
| static int rounds = 0; |
| |
| /* argv0 */ |
| extern char *__progname; |
| |
| static char hostname[NI_MAXHOST]; |
| |
| #ifdef WITH_OPENSSL |
| /* moduli.c */ |
| int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); |
| int prime_test(FILE *, FILE *, u_int32_t, u_int32_t, char *, unsigned long, |
| unsigned long); |
| #endif |
| |
| static void |
| type_bits_valid(int type, const char *name, u_int32_t *bitsp) |
| { |
| if (type == KEY_UNSPEC) |
| fatal("unknown key type %s", key_type_name); |
| if (*bitsp == 0) { |
| #ifdef WITH_OPENSSL |
| u_int nid; |
| |
| switch(type) { |
| case KEY_DSA: |
| *bitsp = DEFAULT_BITS_DSA; |
| break; |
| case KEY_ECDSA: |
| if (name != NULL && |
| (nid = sshkey_ecdsa_nid_from_name(name)) > 0) |
| *bitsp = sshkey_curve_nid_to_bits(nid); |
| if (*bitsp == 0) |
| *bitsp = DEFAULT_BITS_ECDSA; |
| break; |
| case KEY_RSA: |
| *bitsp = DEFAULT_BITS; |
| break; |
| } |
| #endif |
| } |
| #ifdef WITH_OPENSSL |
| switch (type) { |
| case KEY_DSA: |
| if (*bitsp != 1024) |
| fatal("Invalid DSA key length: must be 1024 bits"); |
| break; |
| case KEY_RSA: |
| if (*bitsp < SSH_RSA_MINIMUM_MODULUS_SIZE) |
| fatal("Invalid RSA key length: minimum is %d bits", |
| SSH_RSA_MINIMUM_MODULUS_SIZE); |
| else if (*bitsp > OPENSSL_RSA_MAX_MODULUS_BITS) |
| fatal("Invalid RSA key length: maximum is %d bits", |
| OPENSSL_RSA_MAX_MODULUS_BITS); |
| break; |
| case KEY_ECDSA: |
| if (sshkey_ecdsa_bits_to_nid(*bitsp) == -1) |
| fatal("Invalid ECDSA key length: valid lengths are " |
| #ifdef OPENSSL_HAS_NISTP521 |
| "256, 384 or 521 bits"); |
| #else |
| "256 or 384 bits"); |
| #endif |
| } |
| #endif |
| } |
| |
| /* |
| * Checks whether a file exists and, if so, asks the user whether they wish |
| * to overwrite it. |
| * Returns nonzero if the file does not already exist or if the user agrees to |
| * overwrite, or zero otherwise. |
| */ |
| static int |
| confirm_overwrite(const char *filename) |
| { |
| char yesno[3]; |
| struct stat st; |
| |
| if (stat(filename, &st) != 0) |
| return 1; |
| printf("%s already exists.\n", filename); |
| printf("Overwrite (y/n)? "); |
| fflush(stdout); |
| if (fgets(yesno, sizeof(yesno), stdin) == NULL) |
| return 0; |
| if (yesno[0] != 'y' && yesno[0] != 'Y') |
| return 0; |
| return 1; |
| } |
| |
| static void |
| ask_filename(struct passwd *pw, const char *prompt) |
| { |
| char buf[1024]; |
| char *name = NULL; |
| |
| if (key_type_name == NULL) |
| name = _PATH_SSH_CLIENT_ID_RSA; |
| else { |
| switch (sshkey_type_from_name(key_type_name)) { |
| case KEY_DSA_CERT: |
| case KEY_DSA: |
| name = _PATH_SSH_CLIENT_ID_DSA; |
| break; |
| #ifdef OPENSSL_HAS_ECC |
| case KEY_ECDSA_CERT: |
| case KEY_ECDSA: |
| name = _PATH_SSH_CLIENT_ID_ECDSA; |
| break; |
| #endif |
| case KEY_RSA_CERT: |
| case KEY_RSA: |
| name = _PATH_SSH_CLIENT_ID_RSA; |
| break; |
| case KEY_ED25519: |
| case KEY_ED25519_CERT: |
| name = _PATH_SSH_CLIENT_ID_ED25519; |
| break; |
| case KEY_XMSS: |
| case KEY_XMSS_CERT: |
| name = _PATH_SSH_CLIENT_ID_XMSS; |
| break; |
| default: |
| fatal("bad key type"); |
| } |
| } |
| snprintf(identity_file, sizeof(identity_file), |
| "%s/%s", pw->pw_dir, name); |
| printf("%s (%s): ", prompt, identity_file); |
| fflush(stdout); |
| if (fgets(buf, sizeof(buf), stdin) == NULL) |
| exit(1); |
| buf[strcspn(buf, "\n")] = '\0'; |
| if (strcmp(buf, "") != 0) |
| strlcpy(identity_file, buf, sizeof(identity_file)); |
| have_identity = 1; |
| } |
| |
| static struct sshkey * |
| load_identity(const char *filename, char **commentp) |
| { |
| char *pass; |
| struct sshkey *prv; |
| int r; |
| |
| if (commentp != NULL) |
| *commentp = NULL; |
| if ((r = sshkey_load_private(filename, "", &prv, commentp)) == 0) |
| return prv; |
| if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) |
| fatal("Load key \"%s\": %s", filename, ssh_err(r)); |
| if (identity_passphrase) |
| pass = xstrdup(identity_passphrase); |
| else |
| pass = read_passphrase("Enter passphrase: ", RP_ALLOW_STDIN); |
| r = sshkey_load_private(filename, pass, &prv, commentp); |
| explicit_bzero(pass, strlen(pass)); |
| free(pass); |
| if (r != 0) |
| fatal("Load key \"%s\": %s", filename, ssh_err(r)); |
| return prv; |
| } |
| |
| #define SSH_COM_PUBLIC_BEGIN "---- BEGIN SSH2 PUBLIC KEY ----" |
| #define SSH_COM_PUBLIC_END "---- END SSH2 PUBLIC KEY ----" |
| #define SSH_COM_PRIVATE_BEGIN "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----" |
| #define SSH_COM_PRIVATE_KEY_MAGIC 0x3f6ff9eb |
| |
| #ifdef WITH_OPENSSL |
| static void |
| do_convert_to_ssh2(struct passwd *pw, struct sshkey *k) |
| { |
| struct sshbuf *b; |
| char comment[61], *b64; |
| int r; |
| |
| if ((b = sshbuf_new()) == NULL) |
| fatal("%s: sshbuf_new failed", __func__); |
| if ((r = sshkey_putb(k, b)) != 0) |
| fatal("key_to_blob failed: %s", ssh_err(r)); |
| if ((b64 = sshbuf_dtob64_string(b, 1)) == NULL) |
| fatal("%s: sshbuf_dtob64_string failed", __func__); |
| |
| /* Comment + surrounds must fit into 72 chars (RFC 4716 sec 3.3) */ |
| snprintf(comment, sizeof(comment), |
| "%u-bit %s, converted by %s@%s from OpenSSH", |
| sshkey_size(k), sshkey_type(k), |
| pw->pw_name, hostname); |
| |
| sshkey_free(k); |
| sshbuf_free(b); |
| |
| fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); |
| fprintf(stdout, "Comment: \"%s\"\n%s", comment, b64); |
| fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); |
| free(b64); |
| exit(0); |
| } |
| |
| static void |
| do_convert_to_pkcs8(struct sshkey *k) |
| { |
| switch (sshkey_type_plain(k->type)) { |
| case KEY_RSA: |
| if (!PEM_write_RSA_PUBKEY(stdout, k->rsa)) |
| fatal("PEM_write_RSA_PUBKEY failed"); |
| break; |
| case KEY_DSA: |
| if (!PEM_write_DSA_PUBKEY(stdout, k->dsa)) |
| fatal("PEM_write_DSA_PUBKEY failed"); |
| break; |
| #ifdef OPENSSL_HAS_ECC |
| case KEY_ECDSA: |
| if (!PEM_write_EC_PUBKEY(stdout, k->ecdsa)) |
| fatal("PEM_write_EC_PUBKEY failed"); |
| break; |
| #endif |
| default: |
| fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); |
| } |
| exit(0); |
| } |
| |
| static void |
| do_convert_to_pem(struct sshkey *k) |
| { |
| switch (sshkey_type_plain(k->type)) { |
| case KEY_RSA: |
| if (!PEM_write_RSAPublicKey(stdout, k->rsa)) |
| fatal("PEM_write_RSAPublicKey failed"); |
| break; |
| default: |
| fatal("%s: unsupported key type %s", __func__, sshkey_type(k)); |
| } |
| exit(0); |
| } |
| |
| static void |
| do_convert_to(struct passwd *pw) |
| { |
| struct sshkey *k; |
| struct stat st; |
| int r; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| if ((r = sshkey_load_public(identity_file, &k, NULL)) != 0) |
| k = load_identity(identity_file, NULL); |
| switch (convert_format) { |
| case FMT_RFC4716: |
| do_convert_to_ssh2(pw, k); |
| break; |
| case FMT_PKCS8: |
| do_convert_to_pkcs8(k); |
| break; |
| case FMT_PEM: |
| do_convert_to_pem(k); |
| break; |
| default: |
| fatal("%s: unknown key format %d", __func__, convert_format); |
| } |
| exit(0); |
| } |
| |
| /* |
| * This is almost exactly the bignum1 encoding, but with 32 bit for length |
| * instead of 16. |
| */ |
| static void |
| buffer_get_bignum_bits(struct sshbuf *b, BIGNUM *value) |
| { |
| u_int bytes, bignum_bits; |
| int r; |
| |
| if ((r = sshbuf_get_u32(b, &bignum_bits)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| bytes = (bignum_bits + 7) / 8; |
| if (sshbuf_len(b) < bytes) |
| fatal("%s: input buffer too small: need %d have %zu", |
| __func__, bytes, sshbuf_len(b)); |
| if (BN_bin2bn(sshbuf_ptr(b), bytes, value) == NULL) |
| fatal("%s: BN_bin2bn failed", __func__); |
| if ((r = sshbuf_consume(b, bytes)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| } |
| |
| static struct sshkey * |
| do_convert_private_ssh2(struct sshbuf *b) |
| { |
| struct sshkey *key = NULL; |
| char *type, *cipher; |
| u_char e1, e2, e3, *sig = NULL, data[] = "abcde12345"; |
| int r, rlen, ktype; |
| u_int magic, i1, i2, i3, i4; |
| size_t slen; |
| u_long e; |
| BIGNUM *dsa_p = NULL, *dsa_q = NULL, *dsa_g = NULL; |
| BIGNUM *dsa_pub_key = NULL, *dsa_priv_key = NULL; |
| BIGNUM *rsa_n = NULL, *rsa_e = NULL, *rsa_d = NULL; |
| BIGNUM *rsa_p = NULL, *rsa_q = NULL, *rsa_iqmp = NULL; |
| |
| if ((r = sshbuf_get_u32(b, &magic)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| |
| if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { |
| error("bad magic 0x%x != 0x%x", magic, |
| SSH_COM_PRIVATE_KEY_MAGIC); |
| return NULL; |
| } |
| if ((r = sshbuf_get_u32(b, &i1)) != 0 || |
| (r = sshbuf_get_cstring(b, &type, NULL)) != 0 || |
| (r = sshbuf_get_cstring(b, &cipher, NULL)) != 0 || |
| (r = sshbuf_get_u32(b, &i2)) != 0 || |
| (r = sshbuf_get_u32(b, &i3)) != 0 || |
| (r = sshbuf_get_u32(b, &i4)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| debug("ignore (%d %d %d %d)", i1, i2, i3, i4); |
| if (strcmp(cipher, "none") != 0) { |
| error("unsupported cipher %s", cipher); |
| free(cipher); |
| free(type); |
| return NULL; |
| } |
| free(cipher); |
| |
| if (strstr(type, "dsa")) { |
| ktype = KEY_DSA; |
| } else if (strstr(type, "rsa")) { |
| ktype = KEY_RSA; |
| } else { |
| free(type); |
| return NULL; |
| } |
| if ((key = sshkey_new(ktype)) == NULL) |
| fatal("sshkey_new failed"); |
| free(type); |
| |
| switch (key->type) { |
| case KEY_DSA: |
| if ((dsa_p = BN_new()) == NULL || |
| (dsa_q = BN_new()) == NULL || |
| (dsa_g = BN_new()) == NULL || |
| (dsa_pub_key = BN_new()) == NULL || |
| (dsa_priv_key = BN_new()) == NULL) |
| fatal("%s: BN_new", __func__); |
| buffer_get_bignum_bits(b, dsa_p); |
| buffer_get_bignum_bits(b, dsa_g); |
| buffer_get_bignum_bits(b, dsa_q); |
| buffer_get_bignum_bits(b, dsa_pub_key); |
| buffer_get_bignum_bits(b, dsa_priv_key); |
| if (!DSA_set0_pqg(key->dsa, dsa_p, dsa_q, dsa_g)) |
| fatal("%s: DSA_set0_pqg failed", __func__); |
| dsa_p = dsa_q = dsa_g = NULL; /* transferred */ |
| if (!DSA_set0_key(key->dsa, dsa_pub_key, dsa_priv_key)) |
| fatal("%s: DSA_set0_key failed", __func__); |
| dsa_pub_key = dsa_priv_key = NULL; /* transferred */ |
| break; |
| case KEY_RSA: |
| if ((r = sshbuf_get_u8(b, &e1)) != 0 || |
| (e1 < 30 && (r = sshbuf_get_u8(b, &e2)) != 0) || |
| (e1 < 30 && (r = sshbuf_get_u8(b, &e3)) != 0)) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| e = e1; |
| debug("e %lx", e); |
| if (e < 30) { |
| e <<= 8; |
| e += e2; |
| debug("e %lx", e); |
| e <<= 8; |
| e += e3; |
| debug("e %lx", e); |
| } |
| if ((rsa_e = BN_new()) == NULL) |
| fatal("%s: BN_new", __func__); |
| if (!BN_set_word(rsa_e, e)) { |
| BN_clear_free(rsa_e); |
| sshkey_free(key); |
| return NULL; |
| } |
| if ((rsa_n = BN_new()) == NULL || |
| (rsa_d = BN_new()) == NULL || |
| (rsa_p = BN_new()) == NULL || |
| (rsa_q = BN_new()) == NULL || |
| (rsa_iqmp = BN_new()) == NULL) |
| fatal("%s: BN_new", __func__); |
| buffer_get_bignum_bits(b, rsa_d); |
| buffer_get_bignum_bits(b, rsa_n); |
| buffer_get_bignum_bits(b, rsa_iqmp); |
| buffer_get_bignum_bits(b, rsa_q); |
| buffer_get_bignum_bits(b, rsa_p); |
| if (!RSA_set0_key(key->rsa, rsa_n, rsa_e, rsa_d)) |
| fatal("%s: RSA_set0_key failed", __func__); |
| rsa_n = rsa_e = rsa_d = NULL; /* transferred */ |
| if (!RSA_set0_factors(key->rsa, rsa_p, rsa_q)) |
| fatal("%s: RSA_set0_factors failed", __func__); |
| rsa_p = rsa_q = NULL; /* transferred */ |
| if ((r = ssh_rsa_complete_crt_parameters(key, rsa_iqmp)) != 0) |
| fatal("generate RSA parameters failed: %s", ssh_err(r)); |
| BN_clear_free(rsa_iqmp); |
| break; |
| } |
| rlen = sshbuf_len(b); |
| if (rlen != 0) |
| error("%s: remaining bytes in key blob %d", __func__, rlen); |
| |
| /* try the key */ |
| if (sshkey_sign(key, &sig, &slen, data, sizeof(data), NULL, 0) != 0 || |
| sshkey_verify(key, sig, slen, data, sizeof(data), NULL, 0) != 0) { |
| sshkey_free(key); |
| free(sig); |
| return NULL; |
| } |
| free(sig); |
| return key; |
| } |
| |
| static int |
| get_line(FILE *fp, char *line, size_t len) |
| { |
| int c; |
| size_t pos = 0; |
| |
| line[0] = '\0'; |
| while ((c = fgetc(fp)) != EOF) { |
| if (pos >= len - 1) |
| fatal("input line too long."); |
| switch (c) { |
| case '\r': |
| c = fgetc(fp); |
| if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) |
| fatal("unget: %s", strerror(errno)); |
| return pos; |
| case '\n': |
| return pos; |
| } |
| line[pos++] = c; |
| line[pos] = '\0'; |
| } |
| /* We reached EOF */ |
| return -1; |
| } |
| |
| static void |
| do_convert_from_ssh2(struct passwd *pw, struct sshkey **k, int *private) |
| { |
| int r, blen, escaped = 0; |
| u_int len; |
| char line[1024]; |
| struct sshbuf *buf; |
| char encoded[8096]; |
| FILE *fp; |
| |
| if ((buf = sshbuf_new()) == NULL) |
| fatal("sshbuf_new failed"); |
| if ((fp = fopen(identity_file, "r")) == NULL) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| encoded[0] = '\0'; |
| while ((blen = get_line(fp, line, sizeof(line))) != -1) { |
| if (blen > 0 && line[blen - 1] == '\\') |
| escaped++; |
| if (strncmp(line, "----", 4) == 0 || |
| strstr(line, ": ") != NULL) { |
| if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL) |
| *private = 1; |
| if (strstr(line, " END ") != NULL) { |
| break; |
| } |
| /* fprintf(stderr, "ignore: %s", line); */ |
| continue; |
| } |
| if (escaped) { |
| escaped--; |
| /* fprintf(stderr, "escaped: %s", line); */ |
| continue; |
| } |
| strlcat(encoded, line, sizeof(encoded)); |
| } |
| len = strlen(encoded); |
| if (((len % 4) == 3) && |
| (encoded[len-1] == '=') && |
| (encoded[len-2] == '=') && |
| (encoded[len-3] == '=')) |
| encoded[len-3] = '\0'; |
| if ((r = sshbuf_b64tod(buf, encoded)) != 0) |
| fatal("%s: base64 decoding failed: %s", __func__, ssh_err(r)); |
| if (*private) |
| *k = do_convert_private_ssh2(buf); |
| else if ((r = sshkey_fromb(buf, k)) != 0) |
| fatal("decode blob failed: %s", ssh_err(r)); |
| fclose(fp); |
| } |
| |
| static void |
| do_convert_from_pkcs8(struct sshkey **k, int *private) |
| { |
| EVP_PKEY *pubkey; |
| FILE *fp; |
| |
| if ((fp = fopen(identity_file, "r")) == NULL) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| if ((pubkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) { |
| fatal("%s: %s is not a recognised public key format", __func__, |
| identity_file); |
| } |
| fclose(fp); |
| switch (EVP_PKEY_base_id(pubkey)) { |
| case EVP_PKEY_RSA: |
| if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new failed"); |
| (*k)->type = KEY_RSA; |
| (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); |
| break; |
| case EVP_PKEY_DSA: |
| if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new failed"); |
| (*k)->type = KEY_DSA; |
| (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); |
| break; |
| #ifdef OPENSSL_HAS_ECC |
| case EVP_PKEY_EC: |
| if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new failed"); |
| (*k)->type = KEY_ECDSA; |
| (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); |
| (*k)->ecdsa_nid = sshkey_ecdsa_key_to_nid((*k)->ecdsa); |
| break; |
| #endif |
| default: |
| fatal("%s: unsupported pubkey type %d", __func__, |
| EVP_PKEY_base_id(pubkey)); |
| } |
| EVP_PKEY_free(pubkey); |
| return; |
| } |
| |
| static void |
| do_convert_from_pem(struct sshkey **k, int *private) |
| { |
| FILE *fp; |
| RSA *rsa; |
| |
| if ((fp = fopen(identity_file, "r")) == NULL) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| if ((rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { |
| if ((*k = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new failed"); |
| (*k)->type = KEY_RSA; |
| (*k)->rsa = rsa; |
| fclose(fp); |
| return; |
| } |
| fatal("%s: unrecognised raw private key format", __func__); |
| } |
| |
| static void |
| do_convert_from(struct passwd *pw) |
| { |
| struct sshkey *k = NULL; |
| int r, private = 0, ok = 0; |
| struct stat st; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
| switch (convert_format) { |
| case FMT_RFC4716: |
| do_convert_from_ssh2(pw, &k, &private); |
| break; |
| case FMT_PKCS8: |
| do_convert_from_pkcs8(&k, &private); |
| break; |
| case FMT_PEM: |
| do_convert_from_pem(&k, &private); |
| break; |
| default: |
| fatal("%s: unknown key format %d", __func__, convert_format); |
| } |
| |
| if (!private) { |
| if ((r = sshkey_write(k, stdout)) == 0) |
| ok = 1; |
| if (ok) |
| fprintf(stdout, "\n"); |
| } else { |
| switch (k->type) { |
| case KEY_DSA: |
| ok = PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, |
| NULL, 0, NULL, NULL); |
| break; |
| #ifdef OPENSSL_HAS_ECC |
| case KEY_ECDSA: |
| ok = PEM_write_ECPrivateKey(stdout, k->ecdsa, NULL, |
| NULL, 0, NULL, NULL); |
| break; |
| #endif |
| case KEY_RSA: |
| ok = PEM_write_RSAPrivateKey(stdout, k->rsa, NULL, |
| NULL, 0, NULL, NULL); |
| break; |
| default: |
| fatal("%s: unsupported key type %s", __func__, |
| sshkey_type(k)); |
| } |
| } |
| |
| if (!ok) |
| fatal("key write failed"); |
| sshkey_free(k); |
| exit(0); |
| } |
| #endif |
| |
| static void |
| do_print_public(struct passwd *pw) |
| { |
| struct sshkey *prv; |
| struct stat st; |
| int r; |
| char *comment = NULL; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s", identity_file, strerror(errno)); |
| prv = load_identity(identity_file, &comment); |
| if ((r = sshkey_write(prv, stdout)) != 0) |
| error("sshkey_write failed: %s", ssh_err(r)); |
| sshkey_free(prv); |
| if (comment != NULL && *comment != '\0') |
| fprintf(stdout, " %s", comment); |
| fprintf(stdout, "\n"); |
| free(comment); |
| exit(0); |
| } |
| |
| static void |
| do_download(struct passwd *pw) |
| { |
| #ifdef ENABLE_PKCS11 |
| struct sshkey **keys = NULL; |
| int i, nkeys; |
| enum sshkey_fp_rep rep; |
| int fptype; |
| char *fp, *ra; |
| |
| fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| |
| pkcs11_init(1); |
| nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); |
| if (nkeys <= 0) |
| fatal("cannot read public key from pkcs11"); |
| for (i = 0; i < nkeys; i++) { |
| if (print_fingerprint) { |
| fp = sshkey_fingerprint(keys[i], fptype, rep); |
| ra = sshkey_fingerprint(keys[i], fingerprint_hash, |
| SSH_FP_RANDOMART); |
| if (fp == NULL || ra == NULL) |
| fatal("%s: sshkey_fingerprint fail", __func__); |
| printf("%u %s %s (PKCS11 key)\n", sshkey_size(keys[i]), |
| fp, sshkey_type(keys[i])); |
| if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| printf("%s\n", ra); |
| free(ra); |
| free(fp); |
| } else { |
| (void) sshkey_write(keys[i], stdout); /* XXX check */ |
| fprintf(stdout, "\n"); |
| } |
| sshkey_free(keys[i]); |
| } |
| free(keys); |
| pkcs11_terminate(); |
| exit(0); |
| #else |
| fatal("no pkcs11 support"); |
| #endif /* ENABLE_PKCS11 */ |
| } |
| |
| static struct sshkey * |
| try_read_key(char **cpp) |
| { |
| struct sshkey *ret; |
| int r; |
| |
| if ((ret = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new failed"); |
| if ((r = sshkey_read(ret, cpp)) == 0) |
| return ret; |
| /* Not a key */ |
| sshkey_free(ret); |
| return NULL; |
| } |
| |
| static void |
| fingerprint_one_key(const struct sshkey *public, const char *comment) |
| { |
| char *fp = NULL, *ra = NULL; |
| enum sshkey_fp_rep rep; |
| int fptype; |
| |
| fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| fp = sshkey_fingerprint(public, fptype, rep); |
| ra = sshkey_fingerprint(public, fingerprint_hash, SSH_FP_RANDOMART); |
| if (fp == NULL || ra == NULL) |
| fatal("%s: sshkey_fingerprint failed", __func__); |
| mprintf("%u %s %s (%s)\n", sshkey_size(public), fp, |
| comment ? comment : "no comment", sshkey_type(public)); |
| if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| printf("%s\n", ra); |
| free(ra); |
| free(fp); |
| } |
| |
| static void |
| fingerprint_private(const char *path) |
| { |
| struct stat st; |
| char *comment = NULL; |
| struct sshkey *public = NULL; |
| int r; |
| |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s", path, strerror(errno)); |
| if ((r = sshkey_load_public(path, &public, &comment)) != 0) { |
| debug("load public \"%s\": %s", path, ssh_err(r)); |
| if ((r = sshkey_load_private(path, NULL, |
| &public, &comment)) != 0) { |
| debug("load private \"%s\": %s", path, ssh_err(r)); |
| fatal("%s is not a key file.", path); |
| } |
| } |
| |
| fingerprint_one_key(public, comment); |
| sshkey_free(public); |
| free(comment); |
| } |
| |
| static void |
| do_fingerprint(struct passwd *pw) |
| { |
| FILE *f; |
| struct sshkey *public = NULL; |
| char *comment = NULL, *cp, *ep, *line = NULL; |
| size_t linesize = 0; |
| int i, invalid = 1; |
| const char *path; |
| u_long lnum = 0; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| path = identity_file; |
| |
| if (strcmp(identity_file, "-") == 0) { |
| f = stdin; |
| path = "(stdin)"; |
| } else if ((f = fopen(path, "r")) == NULL) |
| fatal("%s: %s: %s", __progname, path, strerror(errno)); |
| |
| while (getline(&line, &linesize, f) != -1) { |
| lnum++; |
| cp = line; |
| cp[strcspn(cp, "\n")] = '\0'; |
| /* Trim leading space and comments */ |
| cp = line + strspn(line, " \t"); |
| if (*cp == '#' || *cp == '\0') |
| continue; |
| |
| /* |
| * Input may be plain keys, private keys, authorized_keys |
| * or known_hosts. |
| */ |
| |
| /* |
| * Try private keys first. Assume a key is private if |
| * "SSH PRIVATE KEY" appears on the first line and we're |
| * not reading from stdin (XXX support private keys on stdin). |
| */ |
| if (lnum == 1 && strcmp(identity_file, "-") != 0 && |
| strstr(cp, "PRIVATE KEY") != NULL) { |
| free(line); |
| fclose(f); |
| fingerprint_private(path); |
| exit(0); |
| } |
| |
| /* |
| * If it's not a private key, then this must be prepared to |
| * accept a public key prefixed with a hostname or options. |
| * Try a bare key first, otherwise skip the leading stuff. |
| */ |
| if ((public = try_read_key(&cp)) == NULL) { |
| i = strtol(cp, &ep, 10); |
| if (i == 0 || ep == NULL || |
| (*ep != ' ' && *ep != '\t')) { |
| int quoted = 0; |
| |
| comment = cp; |
| for (; *cp && (quoted || (*cp != ' ' && |
| *cp != '\t')); cp++) { |
| if (*cp == '\\' && cp[1] == '"') |
| cp++; /* Skip both */ |
| else if (*cp == '"') |
| quoted = !quoted; |
| } |
| if (!*cp) |
| continue; |
| *cp++ = '\0'; |
| } |
| } |
| /* Retry after parsing leading hostname/key options */ |
| if (public == NULL && (public = try_read_key(&cp)) == NULL) { |
| debug("%s:%lu: not a public key", path, lnum); |
| continue; |
| } |
| |
| /* Find trailing comment, if any */ |
| for (; *cp == ' ' || *cp == '\t'; cp++) |
| ; |
| if (*cp != '\0' && *cp != '#') |
| comment = cp; |
| |
| fingerprint_one_key(public, comment); |
| sshkey_free(public); |
| invalid = 0; /* One good key in the file is sufficient */ |
| } |
| fclose(f); |
| free(line); |
| |
| if (invalid) |
| fatal("%s is not a public key file.", path); |
| exit(0); |
| } |
| |
| static void |
| do_gen_all_hostkeys(struct passwd *pw) |
| { |
| struct { |
| char *key_type; |
| char *key_type_display; |
| char *path; |
| } key_types[] = { |
| #ifdef WITH_OPENSSL |
| { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, |
| { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, |
| #ifdef OPENSSL_HAS_ECC |
| { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, |
| #endif /* OPENSSL_HAS_ECC */ |
| #endif /* WITH_OPENSSL */ |
| { "ed25519", "ED25519",_PATH_HOST_ED25519_KEY_FILE }, |
| #ifdef WITH_XMSS |
| { "xmss", "XMSS",_PATH_HOST_XMSS_KEY_FILE }, |
| #endif /* WITH_XMSS */ |
| { NULL, NULL, NULL } |
| }; |
| |
| u_int32_t bits = 0; |
| int first = 0; |
| struct stat st; |
| struct sshkey *private, *public; |
| char comment[1024], *prv_tmp, *pub_tmp, *prv_file, *pub_file; |
| int i, type, fd, r; |
| FILE *f; |
| |
| for (i = 0; key_types[i].key_type; i++) { |
| public = private = NULL; |
| prv_tmp = pub_tmp = prv_file = pub_file = NULL; |
| |
| xasprintf(&prv_file, "%s%s", |
| identity_file, key_types[i].path); |
| |
| /* Check whether private key exists and is not zero-length */ |
| if (stat(prv_file, &st) == 0) { |
| if (st.st_size != 0) |
| goto next; |
| } else if (errno != ENOENT) { |
| error("Could not stat %s: %s", key_types[i].path, |
| strerror(errno)); |
| goto failnext; |
| } |
| |
| /* |
| * Private key doesn't exist or is invalid; proceed with |
| * key generation. |
| */ |
| xasprintf(&prv_tmp, "%s%s.XXXXXXXXXX", |
| identity_file, key_types[i].path); |
| xasprintf(&pub_tmp, "%s%s.pub.XXXXXXXXXX", |
| identity_file, key_types[i].path); |
| xasprintf(&pub_file, "%s%s.pub", |
| identity_file, key_types[i].path); |
| |
| if (first == 0) { |
| first = 1; |
| printf("%s: generating new host keys: ", __progname); |
| } |
| printf("%s ", key_types[i].key_type_display); |
| fflush(stdout); |
| type = sshkey_type_from_name(key_types[i].key_type); |
| if ((fd = mkstemp(prv_tmp)) == -1) { |
| error("Could not save your public key in %s: %s", |
| prv_tmp, strerror(errno)); |
| goto failnext; |
| } |
| close(fd); /* just using mkstemp() to generate/reserve a name */ |
| bits = 0; |
| type_bits_valid(type, NULL, &bits); |
| if ((r = sshkey_generate(type, bits, &private)) != 0) { |
| error("sshkey_generate failed: %s", ssh_err(r)); |
| goto failnext; |
| } |
| if ((r = sshkey_from_private(private, &public)) != 0) |
| fatal("sshkey_from_private failed: %s", ssh_err(r)); |
| snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, |
| hostname); |
| if ((r = sshkey_save_private(private, prv_tmp, "", |
| comment, private_key_format, openssh_format_cipher, |
| rounds)) != 0) { |
| error("Saving key \"%s\" failed: %s", |
| prv_tmp, ssh_err(r)); |
| goto failnext; |
| } |
| if ((fd = mkstemp(pub_tmp)) == -1) { |
| error("Could not save your public key in %s: %s", |
| pub_tmp, strerror(errno)); |
| goto failnext; |
| } |
| (void)fchmod(fd, 0644); |
| f = fdopen(fd, "w"); |
| if (f == NULL) { |
| error("fdopen %s failed: %s", pub_tmp, strerror(errno)); |
| close(fd); |
| goto failnext; |
| } |
| if ((r = sshkey_write(public, f)) != 0) { |
| error("write key failed: %s", ssh_err(r)); |
| fclose(f); |
| goto failnext; |
| } |
| fprintf(f, " %s\n", comment); |
| if (ferror(f) != 0) { |
| error("write key failed: %s", strerror(errno)); |
| fclose(f); |
| goto failnext; |
| } |
| if (fclose(f) != 0) { |
| error("key close failed: %s", strerror(errno)); |
| goto failnext; |
| } |
| |
| /* Rename temporary files to their permanent locations. */ |
| if (rename(pub_tmp, pub_file) != 0) { |
| error("Unable to move %s into position: %s", |
| pub_file, strerror(errno)); |
| goto failnext; |
| } |
| if (rename(prv_tmp, prv_file) != 0) { |
| error("Unable to move %s into position: %s", |
| key_types[i].path, strerror(errno)); |
| failnext: |
| first = 0; |
| goto next; |
| } |
| next: |
| sshkey_free(private); |
| sshkey_free(public); |
| free(prv_tmp); |
| free(pub_tmp); |
| free(prv_file); |
| free(pub_file); |
| } |
| if (first != 0) |
| printf("\n"); |
| } |
| |
| struct known_hosts_ctx { |
| const char *host; /* Hostname searched for in find/delete case */ |
| FILE *out; /* Output file, stdout for find_hosts case */ |
| int has_unhashed; /* When hashing, original had unhashed hosts */ |
| int found_key; /* For find/delete, host was found */ |
| int invalid; /* File contained invalid items; don't delete */ |
| int hash_hosts; /* Hash hostnames as we go */ |
| int find_host; /* Search for specific hostname */ |
| int delete_host; /* Delete host from known_hosts */ |
| }; |
| |
| static int |
| known_hosts_hash(struct hostkey_foreach_line *l, void *_ctx) |
| { |
| struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; |
| char *hashed, *cp, *hosts, *ohosts; |
| int has_wild = l->hosts && strcspn(l->hosts, "*?!") != strlen(l->hosts); |
| int was_hashed = l->hosts && l->hosts[0] == HASH_DELIM; |
| |
| switch (l->status) { |
| case HKF_STATUS_OK: |
| case HKF_STATUS_MATCHED: |
| /* |
| * Don't hash hosts already already hashed, with wildcard |
| * characters or a CA/revocation marker. |
| */ |
| if (was_hashed || has_wild || l->marker != MRK_NONE) { |
| fprintf(ctx->out, "%s\n", l->line); |
| if (has_wild && !ctx->find_host) { |
| logit("%s:%lu: ignoring host name " |
| "with wildcard: %.64s", l->path, |
| l->linenum, l->hosts); |
| } |
| return 0; |
| } |
| /* |
| * Split any comma-separated hostnames from the host list, |
| * hash and store separately. |
| */ |
| ohosts = hosts = xstrdup(l->hosts); |
| while ((cp = strsep(&hosts, ",")) != NULL && *cp != '\0') { |
| lowercase(cp); |
| if ((hashed = host_hash(cp, NULL, 0)) == NULL) |
| fatal("hash_host failed"); |
| fprintf(ctx->out, "%s %s\n", hashed, l->rawkey); |
| ctx->has_unhashed = 1; |
| } |
| free(ohosts); |
| return 0; |
| case HKF_STATUS_INVALID: |
| /* Retain invalid lines, but mark file as invalid. */ |
| ctx->invalid = 1; |
| logit("%s:%lu: invalid line", l->path, l->linenum); |
| /* FALLTHROUGH */ |
| default: |
| fprintf(ctx->out, "%s\n", l->line); |
| return 0; |
| } |
| /* NOTREACHED */ |
| return -1; |
| } |
| |
| static int |
| known_hosts_find_delete(struct hostkey_foreach_line *l, void *_ctx) |
| { |
| struct known_hosts_ctx *ctx = (struct known_hosts_ctx *)_ctx; |
| enum sshkey_fp_rep rep; |
| int fptype; |
| char *fp = NULL, *ra = NULL; |
| |
| fptype = print_bubblebabble ? SSH_DIGEST_SHA1 : fingerprint_hash; |
| rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_DEFAULT; |
| |
| if (l->status == HKF_STATUS_MATCHED) { |
| if (ctx->delete_host) { |
| if (l->marker != MRK_NONE) { |
| /* Don't remove CA and revocation lines */ |
| fprintf(ctx->out, "%s\n", l->line); |
| } else { |
| /* |
| * Hostname matches and has no CA/revoke |
| * marker, delete it by *not* writing the |
| * line to ctx->out. |
| */ |
| ctx->found_key = 1; |
| if (!quiet) |
| printf("# Host %s found: line %lu\n", |
| ctx->host, l->linenum); |
| } |
| return 0; |
| } else if (ctx->find_host) { |
| ctx->found_key = 1; |
| if (!quiet) { |
| printf("# Host %s found: line %lu %s\n", |
| ctx->host, |
| l->linenum, l->marker == MRK_CA ? "CA" : |
| (l->marker == MRK_REVOKE ? "REVOKED" : "")); |
| } |
| if (ctx->hash_hosts) |
| known_hosts_hash(l, ctx); |
| else if (print_fingerprint) { |
| fp = sshkey_fingerprint(l->key, fptype, rep); |
| ra = sshkey_fingerprint(l->key, |
| fingerprint_hash, SSH_FP_RANDOMART); |
| if (fp == NULL || ra == NULL) |
| fatal("%s: sshkey_fingerprint failed", |
| __func__); |
| mprintf("%s %s %s %s\n", ctx->host, |
| sshkey_type(l->key), fp, l->comment); |
| if (log_level_get() >= SYSLOG_LEVEL_VERBOSE) |
| printf("%s\n", ra); |
| free(ra); |
| free(fp); |
| } else |
| fprintf(ctx->out, "%s\n", l->line); |
| return 0; |
| } |
| } else if (ctx->delete_host) { |
| /* Retain non-matching hosts when deleting */ |
| if (l->status == HKF_STATUS_INVALID) { |
| ctx->invalid = 1; |
| logit("%s:%lu: invalid line", l->path, l->linenum); |
| } |
| fprintf(ctx->out, "%s\n", l->line); |
| } |
| return 0; |
| } |
| |
| static void |
| do_known_hosts(struct passwd *pw, const char *name, int find_host, |
| int delete_host, int hash_hosts) |
| { |
| char *cp, tmp[PATH_MAX], old[PATH_MAX]; |
| int r, fd, oerrno, inplace = 0; |
| struct known_hosts_ctx ctx; |
| u_int foreach_options; |
| |
| if (!have_identity) { |
| cp = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); |
| if (strlcpy(identity_file, cp, sizeof(identity_file)) >= |
| sizeof(identity_file)) |
| fatal("Specified known hosts path too long"); |
| free(cp); |
| have_identity = 1; |
| } |
| |
| memset(&ctx, 0, sizeof(ctx)); |
| ctx.out = stdout; |
| ctx.host = name; |
| ctx.hash_hosts = hash_hosts; |
| ctx.find_host = find_host; |
| ctx.delete_host = delete_host; |
| |
| /* |
| * Find hosts goes to stdout, hash and deletions happen in-place |
| * A corner case is ssh-keygen -HF foo, which should go to stdout |
| */ |
| if (!find_host && (hash_hosts || delete_host)) { |
| if (strlcpy(tmp, identity_file, sizeof(tmp)) >= sizeof(tmp) || |
| strlcat(tmp, ".XXXXXXXXXX", sizeof(tmp)) >= sizeof(tmp) || |
| strlcpy(old, identity_file, sizeof(old)) >= sizeof(old) || |
| strlcat(old, ".old", sizeof(old)) >= sizeof(old)) |
| fatal("known_hosts path too long"); |
| umask(077); |
| if ((fd = mkstemp(tmp)) == -1) |
| fatal("mkstemp: %s", strerror(errno)); |
| if ((ctx.out = fdopen(fd, "w")) == NULL) { |
| oerrno = errno; |
| unlink(tmp); |
| fatal("fdopen: %s", strerror(oerrno)); |
| } |
| inplace = 1; |
| } |
| /* XXX support identity_file == "-" for stdin */ |
| foreach_options = find_host ? HKF_WANT_MATCH : 0; |
| foreach_options |= print_fingerprint ? HKF_WANT_PARSE_KEY : 0; |
| if ((r = hostkeys_foreach(identity_file, (find_host || !hash_hosts) ? |
| known_hosts_find_delete : known_hosts_hash, &ctx, name, NULL, |
| foreach_options)) != 0) { |
| if (inplace) |
| unlink(tmp); |
| fatal("%s: hostkeys_foreach failed: %s", __func__, ssh_err(r)); |
| } |
| |
| if (inplace) |
| fclose(ctx.out); |
| |
| if (ctx.invalid) { |
| error("%s is not a valid known_hosts file.", identity_file); |
| if (inplace) { |
| error("Not replacing existing known_hosts " |
| "file because of errors"); |
| unlink(tmp); |
| } |
| exit(1); |
| } else if (delete_host && !ctx.found_key) { |
| logit("Host %s not found in %s", name, identity_file); |
| if (inplace) |
| unlink(tmp); |
| } else if (inplace) { |
| /* Backup existing file */ |
| if (unlink(old) == -1 && errno != ENOENT) |
| fatal("unlink %.100s: %s", old, strerror(errno)); |
| if (link(identity_file, old) == -1) |
| fatal("link %.100s to %.100s: %s", identity_file, old, |
| strerror(errno)); |
| /* Move new one into place */ |
| if (rename(tmp, identity_file) == -1) { |
| error("rename\"%s\" to \"%s\": %s", tmp, identity_file, |
| strerror(errno)); |
| unlink(tmp); |
| unlink(old); |
| exit(1); |
| } |
| |
| printf("%s updated.\n", identity_file); |
| printf("Original contents retained as %s\n", old); |
| if (ctx.has_unhashed) { |
| logit("WARNING: %s contains unhashed entries", old); |
| logit("Delete this file to ensure privacy " |
| "of hostnames"); |
| } |
| } |
| |
| exit (find_host && !ctx.found_key); |
| } |
| |
| /* |
| * Perform changing a passphrase. The argument is the passwd structure |
| * for the current user. |
| */ |
| static void |
| do_change_passphrase(struct passwd *pw) |
| { |
| char *comment; |
| char *old_passphrase, *passphrase1, *passphrase2; |
| struct stat st; |
| struct sshkey *private; |
| int r; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s", identity_file, strerror(errno)); |
| /* Try to load the file with empty passphrase. */ |
| r = sshkey_load_private(identity_file, "", &private, &comment); |
| if (r == SSH_ERR_KEY_WRONG_PASSPHRASE) { |
| if (identity_passphrase) |
| old_passphrase = xstrdup(identity_passphrase); |
| else |
| old_passphrase = |
| read_passphrase("Enter old passphrase: ", |
| RP_ALLOW_STDIN); |
| r = sshkey_load_private(identity_file, old_passphrase, |
| &private, &comment); |
| explicit_bzero(old_passphrase, strlen(old_passphrase)); |
| free(old_passphrase); |
| if (r != 0) |
| goto badkey; |
| } else if (r != 0) { |
| badkey: |
| fatal("Failed to load key %s: %s", identity_file, ssh_err(r)); |
| } |
| if (comment) |
| mprintf("Key has comment '%s'\n", comment); |
| |
| /* Ask the new passphrase (twice). */ |
| if (identity_new_passphrase) { |
| passphrase1 = xstrdup(identity_new_passphrase); |
| passphrase2 = NULL; |
| } else { |
| passphrase1 = |
| read_passphrase("Enter new passphrase (empty for no " |
| "passphrase): ", RP_ALLOW_STDIN); |
| passphrase2 = read_passphrase("Enter same passphrase again: ", |
| RP_ALLOW_STDIN); |
| |
| /* Verify that they are the same. */ |
| if (strcmp(passphrase1, passphrase2) != 0) { |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| explicit_bzero(passphrase2, strlen(passphrase2)); |
| free(passphrase1); |
| free(passphrase2); |
| printf("Pass phrases do not match. Try again.\n"); |
| exit(1); |
| } |
| /* Destroy the other copy. */ |
| explicit_bzero(passphrase2, strlen(passphrase2)); |
| free(passphrase2); |
| } |
| |
| /* Save the file using the new passphrase. */ |
| if ((r = sshkey_save_private(private, identity_file, passphrase1, |
| comment, private_key_format, openssh_format_cipher, rounds)) != 0) { |
| error("Saving key \"%s\" failed: %s.", |
| identity_file, ssh_err(r)); |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| free(passphrase1); |
| sshkey_free(private); |
| free(comment); |
| exit(1); |
| } |
| /* Destroy the passphrase and the copy of the key in memory. */ |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| free(passphrase1); |
| sshkey_free(private); /* Destroys contents */ |
| free(comment); |
| |
| printf("Your identification has been saved with the new passphrase.\n"); |
| exit(0); |
| } |
| |
| /* |
| * Print the SSHFP RR. |
| */ |
| static int |
| do_print_resource_record(struct passwd *pw, char *fname, char *hname, |
| int print_generic) |
| { |
| struct sshkey *public; |
| char *comment = NULL; |
| struct stat st; |
| int r; |
| |
| if (fname == NULL) |
| fatal("%s: no filename", __func__); |
| if (stat(fname, &st) == -1) { |
| if (errno == ENOENT) |
| return 0; |
| fatal("%s: %s", fname, strerror(errno)); |
| } |
| if ((r = sshkey_load_public(fname, &public, &comment)) != 0) |
| fatal("Failed to read v2 public key from \"%s\": %s.", |
| fname, ssh_err(r)); |
| export_dns_rr(hname, public, stdout, print_generic); |
| sshkey_free(public); |
| free(comment); |
| return 1; |
| } |
| |
| /* |
| * Change the comment of a private key file. |
| */ |
| static void |
| do_change_comment(struct passwd *pw, const char *identity_comment) |
| { |
| char new_comment[1024], *comment, *passphrase; |
| struct sshkey *private; |
| struct sshkey *public; |
| struct stat st; |
| FILE *f; |
| int r, fd; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (stat(identity_file, &st) == -1) |
| fatal("%s: %s", identity_file, strerror(errno)); |
| if ((r = sshkey_load_private(identity_file, "", |
| &private, &comment)) == 0) |
| passphrase = xstrdup(""); |
| else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) |
| fatal("Cannot load private key \"%s\": %s.", |
| identity_file, ssh_err(r)); |
| else { |
| if (identity_passphrase) |
| passphrase = xstrdup(identity_passphrase); |
| else if (identity_new_passphrase) |
| passphrase = xstrdup(identity_new_passphrase); |
| else |
| passphrase = read_passphrase("Enter passphrase: ", |
| RP_ALLOW_STDIN); |
| /* Try to load using the passphrase. */ |
| if ((r = sshkey_load_private(identity_file, passphrase, |
| &private, &comment)) != 0) { |
| explicit_bzero(passphrase, strlen(passphrase)); |
| free(passphrase); |
| fatal("Cannot load private key \"%s\": %s.", |
| identity_file, ssh_err(r)); |
| } |
| } |
| |
| if (private->type != KEY_ED25519 && private->type != KEY_XMSS && |
| private_key_format != SSHKEY_PRIVATE_OPENSSH) { |
| error("Comments are only supported for keys stored in " |
| "the new format (-o)."); |
| explicit_bzero(passphrase, strlen(passphrase)); |
| sshkey_free(private); |
| exit(1); |
| } |
| if (comment) |
| printf("Old comment: %s\n", comment); |
| else |
| printf("No existing comment\n"); |
| |
| if (identity_comment) { |
| strlcpy(new_comment, identity_comment, sizeof(new_comment)); |
| } else { |
| printf("New comment: "); |
| fflush(stdout); |
| if (!fgets(new_comment, sizeof(new_comment), stdin)) { |
| explicit_bzero(passphrase, strlen(passphrase)); |
| sshkey_free(private); |
| exit(1); |
| } |
| new_comment[strcspn(new_comment, "\n")] = '\0'; |
| } |
| if (comment != NULL && strcmp(comment, new_comment) == 0) { |
| printf("No change to comment\n"); |
| free(passphrase); |
| sshkey_free(private); |
| free(comment); |
| exit(0); |
| } |
| |
| /* Save the file using the new passphrase. */ |
| if ((r = sshkey_save_private(private, identity_file, passphrase, |
| new_comment, private_key_format, openssh_format_cipher, |
| rounds)) != 0) { |
| error("Saving key \"%s\" failed: %s", |
| identity_file, ssh_err(r)); |
| explicit_bzero(passphrase, strlen(passphrase)); |
| free(passphrase); |
| sshkey_free(private); |
| free(comment); |
| exit(1); |
| } |
| explicit_bzero(passphrase, strlen(passphrase)); |
| free(passphrase); |
| if ((r = sshkey_from_private(private, &public)) != 0) |
| fatal("sshkey_from_private failed: %s", ssh_err(r)); |
| sshkey_free(private); |
| |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
| fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); |
| if (fd == -1) |
| fatal("Could not save your public key in %s", identity_file); |
| f = fdopen(fd, "w"); |
| if (f == NULL) |
| fatal("fdopen %s failed: %s", identity_file, strerror(errno)); |
| if ((r = sshkey_write(public, f)) != 0) |
| fatal("write key failed: %s", ssh_err(r)); |
| sshkey_free(public); |
| fprintf(f, " %s\n", new_comment); |
| fclose(f); |
| |
| free(comment); |
| |
| if (strlen(new_comment) > 0) |
| printf("Comment '%s' applied\n", new_comment); |
| else |
| printf("Comment removed\n"); |
| |
| exit(0); |
| } |
| |
| static void |
| add_flag_option(struct sshbuf *c, const char *name) |
| { |
| int r; |
| |
| debug3("%s: %s", __func__, name); |
| if ((r = sshbuf_put_cstring(c, name)) != 0 || |
| (r = sshbuf_put_string(c, NULL, 0)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| } |
| |
| static void |
| add_string_option(struct sshbuf *c, const char *name, const char *value) |
| { |
| struct sshbuf *b; |
| int r; |
| |
| debug3("%s: %s=%s", __func__, name, value); |
| if ((b = sshbuf_new()) == NULL) |
| fatal("%s: sshbuf_new failed", __func__); |
| if ((r = sshbuf_put_cstring(b, value)) != 0 || |
| (r = sshbuf_put_cstring(c, name)) != 0 || |
| (r = sshbuf_put_stringb(c, b)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| |
| sshbuf_free(b); |
| } |
| |
| #define OPTIONS_CRITICAL 1 |
| #define OPTIONS_EXTENSIONS 2 |
| static void |
| prepare_options_buf(struct sshbuf *c, int which) |
| { |
| size_t i; |
| |
| sshbuf_reset(c); |
| if ((which & OPTIONS_CRITICAL) != 0 && |
| certflags_command != NULL) |
| add_string_option(c, "force-command", certflags_command); |
| if ((which & OPTIONS_EXTENSIONS) != 0 && |
| (certflags_flags & CERTOPT_X_FWD) != 0) |
| add_flag_option(c, "permit-X11-forwarding"); |
| if ((which & OPTIONS_EXTENSIONS) != 0 && |
| (certflags_flags & CERTOPT_AGENT_FWD) != 0) |
| add_flag_option(c, "permit-agent-forwarding"); |
| if ((which & OPTIONS_EXTENSIONS) != 0 && |
| (certflags_flags & CERTOPT_PORT_FWD) != 0) |
| add_flag_option(c, "permit-port-forwarding"); |
| if ((which & OPTIONS_EXTENSIONS) != 0 && |
| (certflags_flags & CERTOPT_PTY) != 0) |
| add_flag_option(c, "permit-pty"); |
| if ((which & OPTIONS_EXTENSIONS) != 0 && |
| (certflags_flags & CERTOPT_USER_RC) != 0) |
| add_flag_option(c, "permit-user-rc"); |
| if ((which & OPTIONS_CRITICAL) != 0 && |
| certflags_src_addr != NULL) |
| add_string_option(c, "source-address", certflags_src_addr); |
| for (i = 0; i < ncert_userext; i++) { |
| if ((cert_userext[i].crit && (which & OPTIONS_EXTENSIONS)) || |
| (!cert_userext[i].crit && (which & OPTIONS_CRITICAL))) |
| continue; |
| if (cert_userext[i].val == NULL) |
| add_flag_option(c, cert_userext[i].key); |
| else { |
| add_string_option(c, cert_userext[i].key, |
| cert_userext[i].val); |
| } |
| } |
| } |
| |
| static struct sshkey * |
| load_pkcs11_key(char *path) |
| { |
| #ifdef ENABLE_PKCS11 |
| struct sshkey **keys = NULL, *public, *private = NULL; |
| int r, i, nkeys; |
| |
| if ((r = sshkey_load_public(path, &public, NULL)) != 0) |
| fatal("Couldn't load CA public key \"%s\": %s", |
| path, ssh_err(r)); |
| |
| nkeys = pkcs11_add_provider(pkcs11provider, identity_passphrase, &keys); |
| debug3("%s: %d keys", __func__, nkeys); |
| if (nkeys <= 0) |
| fatal("cannot read public key from pkcs11"); |
| for (i = 0; i < nkeys; i++) { |
| if (sshkey_equal_public(public, keys[i])) { |
| private = keys[i]; |
| continue; |
| } |
| sshkey_free(keys[i]); |
| } |
| free(keys); |
| sshkey_free(public); |
| return private; |
| #else |
| fatal("no pkcs11 support"); |
| #endif /* ENABLE_PKCS11 */ |
| } |
| |
| /* Signer for sshkey_certify_custom that uses the agent */ |
| static int |
| agent_signer(struct sshkey *key, u_char **sigp, size_t *lenp, |
| const u_char *data, size_t datalen, |
| const char *alg, u_int compat, void *ctx) |
| { |
| int *agent_fdp = (int *)ctx; |
| |
| return ssh_agent_sign(*agent_fdp, key, sigp, lenp, |
| data, datalen, alg, compat); |
| } |
| |
| static void |
| do_ca_sign(struct passwd *pw, const char *ca_key_path, int prefer_agent, |
| unsigned long long cert_serial, int cert_serial_autoinc, |
| int argc, char **argv) |
| { |
| int r, i, fd, found, agent_fd = -1; |
| u_int n; |
| struct sshkey *ca, *public; |
| char valid[64], *otmp, *tmp, *cp, *out, *comment, **plist = NULL; |
| FILE *f; |
| struct ssh_identitylist *agent_ids; |
| size_t j; |
| |
| #ifdef ENABLE_PKCS11 |
| pkcs11_init(1); |
| #endif |
| tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); |
| if (pkcs11provider != NULL) { |
| /* If a PKCS#11 token was specified then try to use it */ |
| if ((ca = load_pkcs11_key(tmp)) == NULL) |
| fatal("No PKCS#11 key matching %s found", ca_key_path); |
| } else if (prefer_agent) { |
| /* |
| * Agent signature requested. Try to use agent after making |
| * sure the public key specified is actually present in the |
| * agent. |
| */ |
| if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) |
| fatal("Cannot load CA public key %s: %s", |
| tmp, ssh_err(r)); |
| if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) |
| fatal("Cannot use public key for CA signature: %s", |
| ssh_err(r)); |
| if ((r = ssh_fetch_identitylist(agent_fd, &agent_ids)) != 0) |
| fatal("Retrieve agent key list: %s", ssh_err(r)); |
| found = 0; |
| for (j = 0; j < agent_ids->nkeys; j++) { |
| if (sshkey_equal(ca, agent_ids->keys[j])) { |
| found = 1; |
| break; |
| } |
| } |
| if (!found) |
| fatal("CA key %s not found in agent", tmp); |
| ssh_free_identitylist(agent_ids); |
| ca->flags |= SSHKEY_FLAG_EXT; |
| } else { |
| /* CA key is assumed to be a private key on the filesystem */ |
| ca = load_identity(tmp, NULL); |
| } |
| free(tmp); |
| |
| if (key_type_name != NULL && |
| sshkey_type_from_name(key_type_name) != ca->type) { |
| fatal("CA key type %s doesn't match specified %s", |
| sshkey_ssh_name(ca), key_type_name); |
| } |
| |
| for (i = 0; i < argc; i++) { |
| /* Split list of principals */ |
| n = 0; |
| if (cert_principals != NULL) { |
| otmp = tmp = xstrdup(cert_principals); |
| plist = NULL; |
| for (; (cp = strsep(&tmp, ",")) != NULL; n++) { |
| plist = xreallocarray(plist, n + 1, sizeof(*plist)); |
| if (*(plist[n] = xstrdup(cp)) == '\0') |
| fatal("Empty principal name"); |
| } |
| free(otmp); |
| } |
| if (n > SSHKEY_CERT_MAX_PRINCIPALS) |
| fatal("Too many certificate principals specified"); |
| |
| tmp = tilde_expand_filename(argv[i], pw->pw_uid); |
| if ((r = sshkey_load_public(tmp, &public, &comment)) != 0) |
| fatal("%s: unable to open \"%s\": %s", |
| __func__, tmp, ssh_err(r)); |
| if (public->type != KEY_RSA && public->type != KEY_DSA && |
| public->type != KEY_ECDSA && public->type != KEY_ED25519 && |
| public->type != KEY_XMSS) |
| fatal("%s: key \"%s\" type %s cannot be certified", |
| __func__, tmp, sshkey_type(public)); |
| |
| /* Prepare certificate to sign */ |
| if ((r = sshkey_to_certified(public)) != 0) |
| fatal("Could not upgrade key %s to certificate: %s", |
| tmp, ssh_err(r)); |
| public->cert->type = cert_key_type; |
| public->cert->serial = (u_int64_t)cert_serial; |
| public->cert->key_id = xstrdup(cert_key_id); |
| public->cert->nprincipals = n; |
| public->cert->principals = plist; |
| public->cert->valid_after = cert_valid_from; |
| public->cert->valid_before = cert_valid_to; |
| prepare_options_buf(public->cert->critical, OPTIONS_CRITICAL); |
| prepare_options_buf(public->cert->extensions, |
| OPTIONS_EXTENSIONS); |
| if ((r = sshkey_from_private(ca, |
| &public->cert->signature_key)) != 0) |
| fatal("sshkey_from_private (ca key): %s", ssh_err(r)); |
| |
| if (agent_fd != -1 && (ca->flags & SSHKEY_FLAG_EXT) != 0) { |
| if ((r = sshkey_certify_custom(public, ca, |
| key_type_name, agent_signer, &agent_fd)) != 0) |
| fatal("Couldn't certify key %s via agent: %s", |
| tmp, ssh_err(r)); |
| } else { |
| if ((sshkey_certify(public, ca, key_type_name)) != 0) |
| fatal("Couldn't certify key %s: %s", |
| tmp, ssh_err(r)); |
| } |
| |
| if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) |
| *cp = '\0'; |
| xasprintf(&out, "%s-cert.pub", tmp); |
| free(tmp); |
| |
| if ((fd = open(out, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) |
| fatal("Could not open \"%s\" for writing: %s", out, |
| strerror(errno)); |
| if ((f = fdopen(fd, "w")) == NULL) |
| fatal("%s: fdopen: %s", __func__, strerror(errno)); |
| if ((r = sshkey_write(public, f)) != 0) |
| fatal("Could not write certified key to %s: %s", |
| out, ssh_err(r)); |
| fprintf(f, " %s\n", comment); |
| fclose(f); |
| |
| if (!quiet) { |
| sshkey_format_cert_validity(public->cert, |
| valid, sizeof(valid)); |
| logit("Signed %s key %s: id \"%s\" serial %llu%s%s " |
| "valid %s", sshkey_cert_type(public), |
| out, public->cert->key_id, |
| (unsigned long long)public->cert->serial, |
| cert_principals != NULL ? " for " : "", |
| cert_principals != NULL ? cert_principals : "", |
| valid); |
| } |
| |
| sshkey_free(public); |
| free(out); |
| if (cert_serial_autoinc) |
| cert_serial++; |
| } |
| #ifdef ENABLE_PKCS11 |
| pkcs11_terminate(); |
| #endif |
| exit(0); |
| } |
| |
| static u_int64_t |
| parse_relative_time(const char *s, time_t now) |
| { |
| int64_t mul, secs; |
| |
| mul = *s == '-' ? -1 : 1; |
| |
| if ((secs = convtime(s + 1)) == -1) |
| fatal("Invalid relative certificate time %s", s); |
| if (mul == -1 && secs > now) |
| fatal("Certificate time %s cannot be represented", s); |
| return now + (u_int64_t)(secs * mul); |
| } |
| |
| static void |
| parse_cert_times(char *timespec) |
| { |
| char *from, *to; |
| time_t now = time(NULL); |
| int64_t secs; |
| |
| /* +timespec relative to now */ |
| if (*timespec == '+' && strchr(timespec, ':') == NULL) { |
| if ((secs = convtime(timespec + 1)) == -1) |
| fatal("Invalid relative certificate life %s", timespec); |
| cert_valid_to = now + secs; |
| /* |
| * Backdate certificate one minute to avoid problems on hosts |
| * with poorly-synchronised clocks. |
| */ |
| cert_valid_from = ((now - 59)/ 60) * 60; |
| return; |
| } |
| |
| /* |
| * from:to, where |
| * from := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "always" |
| * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS | "forever" |
| */ |
| from = xstrdup(timespec); |
| to = strchr(from, ':'); |
| if (to == NULL || from == to || *(to + 1) == '\0') |
| fatal("Invalid certificate life specification %s", timespec); |
| *to++ = '\0'; |
| |
| if (*from == '-' || *from == '+') |
| cert_valid_from = parse_relative_time(from, now); |
| else if (strcmp(from, "always") == 0) |
| cert_valid_from = 0; |
| else if (parse_absolute_time(from, &cert_valid_from) != 0) |
| fatal("Invalid from time \"%s\"", from); |
| |
| if (*to == '-' || *to == '+') |
| cert_valid_to = parse_relative_time(to, now); |
| else if (strcmp(to, "forever") == 0) |
| cert_valid_to = ~(u_int64_t)0; |
| else if (parse_absolute_time(to, &cert_valid_to) != 0) |
| fatal("Invalid to time \"%s\"", to); |
| |
| if (cert_valid_to <= cert_valid_from) |
| fatal("Empty certificate validity interval"); |
| free(from); |
| } |
| |
| static void |
| add_cert_option(char *opt) |
| { |
| char *val, *cp; |
| int iscrit = 0; |
| |
| if (strcasecmp(opt, "clear") == 0) |
| certflags_flags = 0; |
| else if (strcasecmp(opt, "no-x11-forwarding") == 0) |
| certflags_flags &= ~CERTOPT_X_FWD; |
| else if (strcasecmp(opt, "permit-x11-forwarding") == 0) |
| certflags_flags |= CERTOPT_X_FWD; |
| else if (strcasecmp(opt, "no-agent-forwarding") == 0) |
| certflags_flags &= ~CERTOPT_AGENT_FWD; |
| else if (strcasecmp(opt, "permit-agent-forwarding") == 0) |
| certflags_flags |= CERTOPT_AGENT_FWD; |
| else if (strcasecmp(opt, "no-port-forwarding") == 0) |
| certflags_flags &= ~CERTOPT_PORT_FWD; |
| else if (strcasecmp(opt, "permit-port-forwarding") == 0) |
| certflags_flags |= CERTOPT_PORT_FWD; |
| else if (strcasecmp(opt, "no-pty") == 0) |
| certflags_flags &= ~CERTOPT_PTY; |
| else if (strcasecmp(opt, "permit-pty") == 0) |
| certflags_flags |= CERTOPT_PTY; |
| else if (strcasecmp(opt, "no-user-rc") == 0) |
| certflags_flags &= ~CERTOPT_USER_RC; |
| else if (strcasecmp(opt, "permit-user-rc") == 0) |
| certflags_flags |= CERTOPT_USER_RC; |
| else if (strncasecmp(opt, "force-command=", 14) == 0) { |
| val = opt + 14; |
| if (*val == '\0') |
| fatal("Empty force-command option"); |
| if (certflags_command != NULL) |
| fatal("force-command already specified"); |
| certflags_command = xstrdup(val); |
| } else if (strncasecmp(opt, "source-address=", 15) == 0) { |
| val = opt + 15; |
| if (*val == '\0') |
| fatal("Empty source-address option"); |
| if (certflags_src_addr != NULL) |
| fatal("source-address already specified"); |
| if (addr_match_cidr_list(NULL, val) != 0) |
| fatal("Invalid source-address list"); |
| certflags_src_addr = xstrdup(val); |
| } else if (strncasecmp(opt, "extension:", 10) == 0 || |
| (iscrit = (strncasecmp(opt, "critical:", 9) == 0))) { |
| val = xstrdup(strchr(opt, ':') + 1); |
| if ((cp = strchr(val, '=')) != NULL) |
| *cp++ = '\0'; |
| cert_userext = xreallocarray(cert_userext, ncert_userext + 1, |
| sizeof(*cert_userext)); |
| cert_userext[ncert_userext].key = val; |
| cert_userext[ncert_userext].val = cp == NULL ? |
| NULL : xstrdup(cp); |
| cert_userext[ncert_userext].crit = iscrit; |
| ncert_userext++; |
| } else |
| fatal("Unsupported certificate option \"%s\"", opt); |
| } |
| |
| static void |
| show_options(struct sshbuf *optbuf, int in_critical) |
| { |
| char *name, *arg; |
| struct sshbuf *options, *option = NULL; |
| int r; |
| |
| if ((options = sshbuf_fromb(optbuf)) == NULL) |
| fatal("%s: sshbuf_fromb failed", __func__); |
| while (sshbuf_len(options) != 0) { |
| sshbuf_free(option); |
| option = NULL; |
| if ((r = sshbuf_get_cstring(options, &name, NULL)) != 0 || |
| (r = sshbuf_froms(options, &option)) != 0) |
| fatal("%s: buffer error: %s", __func__, ssh_err(r)); |
| printf(" %s", name); |
| if (!in_critical && |
| (strcmp(name, "permit-X11-forwarding") == 0 || |
| strcmp(name, "permit-agent-forwarding") == 0 || |
| strcmp(name, "permit-port-forwarding") == 0 || |
| strcmp(name, "permit-pty") == 0 || |
| strcmp(name, "permit-user-rc") == 0)) |
| printf("\n"); |
| else if (in_critical && |
| (strcmp(name, "force-command") == 0 || |
| strcmp(name, "source-address") == 0)) { |
| if ((r = sshbuf_get_cstring(option, &arg, NULL)) != 0) |
| fatal("%s: buffer error: %s", |
| __func__, ssh_err(r)); |
| printf(" %s\n", arg); |
| free(arg); |
| } else { |
| printf(" UNKNOWN OPTION (len %zu)\n", |
| sshbuf_len(option)); |
| sshbuf_reset(option); |
| } |
| free(name); |
| if (sshbuf_len(option) != 0) |
| fatal("Option corrupt: extra data at end"); |
| } |
| sshbuf_free(option); |
| sshbuf_free(options); |
| } |
| |
| static void |
| print_cert(struct sshkey *key) |
| { |
| char valid[64], *key_fp, *ca_fp; |
| u_int i; |
| |
| key_fp = sshkey_fingerprint(key, fingerprint_hash, SSH_FP_DEFAULT); |
| ca_fp = sshkey_fingerprint(key->cert->signature_key, |
| fingerprint_hash, SSH_FP_DEFAULT); |
| if (key_fp == NULL || ca_fp == NULL) |
| fatal("%s: sshkey_fingerprint fail", __func__); |
| sshkey_format_cert_validity(key->cert, valid, sizeof(valid)); |
| |
| printf(" Type: %s %s certificate\n", sshkey_ssh_name(key), |
| sshkey_cert_type(key)); |
| printf(" Public key: %s %s\n", sshkey_type(key), key_fp); |
| printf(" Signing CA: %s %s (using %s)\n", |
| sshkey_type(key->cert->signature_key), ca_fp, |
| key->cert->signature_type); |
| printf(" Key ID: \"%s\"\n", key->cert->key_id); |
| printf(" Serial: %llu\n", (unsigned long long)key->cert->serial); |
| printf(" Valid: %s\n", valid); |
| printf(" Principals: "); |
| if (key->cert->nprincipals == 0) |
| printf("(none)\n"); |
| else { |
| for (i = 0; i < key->cert->nprincipals; i++) |
| printf("\n %s", |
| key->cert->principals[i]); |
| printf("\n"); |
| } |
| printf(" Critical Options: "); |
| if (sshbuf_len(key->cert->critical) == 0) |
| printf("(none)\n"); |
| else { |
| printf("\n"); |
| show_options(key->cert->critical, 1); |
| } |
| printf(" Extensions: "); |
| if (sshbuf_len(key->cert->extensions) == 0) |
| printf("(none)\n"); |
| else { |
| printf("\n"); |
| show_options(key->cert->extensions, 0); |
| } |
| } |
| |
| static void |
| do_show_cert(struct passwd *pw) |
| { |
| struct sshkey *key = NULL; |
| struct stat st; |
| int r, is_stdin = 0, ok = 0; |
| FILE *f; |
| char *cp, *line = NULL; |
| const char *path; |
| size_t linesize = 0; |
| u_long lnum = 0; |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which the key is"); |
| if (strcmp(identity_file, "-") != 0 && stat(identity_file, &st) == -1) |
| fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); |
| |
| path = identity_file; |
| if (strcmp(path, "-") == 0) { |
| f = stdin; |
| path = "(stdin)"; |
| is_stdin = 1; |
| } else if ((f = fopen(identity_file, "r")) == NULL) |
| fatal("fopen %s: %s", identity_file, strerror(errno)); |
| |
| while (getline(&line, &linesize, f) != -1) { |
| lnum++; |
| sshkey_free(key); |
| key = NULL; |
| /* Trim leading space and comments */ |
| cp = line + strspn(line, " \t"); |
| if (*cp == '#' || *cp == '\0') |
| continue; |
| if ((key = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new"); |
| if ((r = sshkey_read(key, &cp)) != 0) { |
| error("%s:%lu: invalid key: %s", path, |
| lnum, ssh_err(r)); |
| continue; |
| } |
| if (!sshkey_is_cert(key)) { |
| error("%s:%lu is not a certificate", path, lnum); |
| continue; |
| } |
| ok = 1; |
| if (!is_stdin && lnum == 1) |
| printf("%s:\n", path); |
| else |
| printf("%s:%lu:\n", path, lnum); |
| print_cert(key); |
| } |
| free(line); |
| sshkey_free(key); |
| fclose(f); |
| exit(ok ? 0 : 1); |
| } |
| |
| static void |
| load_krl(const char *path, struct ssh_krl **krlp) |
| { |
| struct sshbuf *krlbuf; |
| int r, fd; |
| |
| if ((krlbuf = sshbuf_new()) == NULL) |
| fatal("sshbuf_new failed"); |
| if ((fd = open(path, O_RDONLY)) == -1) |
| fatal("open %s: %s", path, strerror(errno)); |
| if ((r = sshkey_load_file(fd, krlbuf)) != 0) |
| fatal("Unable to load KRL: %s", ssh_err(r)); |
| close(fd); |
| /* XXX check sigs */ |
| if ((r = ssh_krl_from_blob(krlbuf, krlp, NULL, 0)) != 0 || |
| *krlp == NULL) |
| fatal("Invalid KRL file: %s", ssh_err(r)); |
| sshbuf_free(krlbuf); |
| } |
| |
| static void |
| hash_to_blob(const char *cp, u_char **blobp, size_t *lenp, |
| const char *file, u_long lnum) |
| { |
| char *tmp; |
| size_t tlen; |
| struct sshbuf *b; |
| int r; |
| |
| if (strncmp(cp, "SHA256:", 7) != 0) |
| fatal("%s:%lu: unsupported hash algorithm", file, lnum); |
| cp += 7; |
| |
| /* |
| * OpenSSH base64 hashes omit trailing '=' |
| * characters; put them back for decode. |
| */ |
| tlen = strlen(cp); |
| tmp = xmalloc(tlen + 4 + 1); |
| strlcpy(tmp, cp, tlen + 1); |
| while ((tlen % 4) != 0) { |
| tmp[tlen++] = '='; |
| tmp[tlen] = '\0'; |
| } |
| if ((b = sshbuf_new()) == NULL) |
| fatal("%s: sshbuf_new failed", __func__); |
| if ((r = sshbuf_b64tod(b, tmp)) != 0) |
| fatal("%s:%lu: decode hash failed: %s", file, lnum, ssh_err(r)); |
| free(tmp); |
| *lenp = sshbuf_len(b); |
| *blobp = xmalloc(*lenp); |
| memcpy(*blobp, sshbuf_ptr(b), *lenp); |
| sshbuf_free(b); |
| } |
| |
| static void |
| update_krl_from_file(struct passwd *pw, const char *file, int wild_ca, |
| const struct sshkey *ca, struct ssh_krl *krl) |
| { |
| struct sshkey *key = NULL; |
| u_long lnum = 0; |
| char *path, *cp, *ep, *line = NULL; |
| u_char *blob = NULL; |
| size_t blen = 0, linesize = 0; |
| unsigned long long serial, serial2; |
| int i, was_explicit_key, was_sha1, was_sha256, was_hash, r; |
| FILE *krl_spec; |
| |
| path = tilde_expand_filename(file, pw->pw_uid); |
| if (strcmp(path, "-") == 0) { |
| krl_spec = stdin; |
| free(path); |
| path = xstrdup("(standard input)"); |
| } else if ((krl_spec = fopen(path, "r")) == NULL) |
| fatal("fopen %s: %s", path, strerror(errno)); |
| |
| if (!quiet) |
| printf("Revoking from %s\n", path); |
| while (getline(&line, &linesize, krl_spec) != -1) { |
| lnum++; |
| was_explicit_key = was_sha1 = was_sha256 = was_hash = 0; |
| cp = line + strspn(line, " \t"); |
| /* Trim trailing space, comments and strip \n */ |
| for (i = 0, r = -1; cp[i] != '\0'; i++) { |
| if (cp[i] == '#' || cp[i] == '\n') { |
| cp[i] = '\0'; |
| break; |
| } |
| if (cp[i] == ' ' || cp[i] == '\t') { |
| /* Remember the start of a span of whitespace */ |
| if (r == -1) |
| r = i; |
| } else |
| r = -1; |
| } |
| if (r != -1) |
| cp[r] = '\0'; |
| if (*cp == '\0') |
| continue; |
| if (strncasecmp(cp, "serial:", 7) == 0) { |
| if (ca == NULL && !wild_ca) { |
| fatal("revoking certificates by serial number " |
| "requires specification of a CA key"); |
| } |
| cp += 7; |
| cp = cp + strspn(cp, " \t"); |
| errno = 0; |
| serial = strtoull(cp, &ep, 0); |
| if (*cp == '\0' || (*ep != '\0' && *ep != '-')) |
| fatal("%s:%lu: invalid serial \"%s\"", |
| path, lnum, cp); |
| if (errno == ERANGE && serial == ULLONG_MAX) |
| fatal("%s:%lu: serial out of range", |
| path, lnum); |
| serial2 = serial; |
| if (*ep == '-') { |
| cp = ep + 1; |
| errno = 0; |
| serial2 = strtoull(cp, &ep, 0); |
| if (*cp == '\0' || *ep != '\0') |
| fatal("%s:%lu: invalid serial \"%s\"", |
| path, lnum, cp); |
| if (errno == ERANGE && serial2 == ULLONG_MAX) |
| fatal("%s:%lu: serial out of range", |
| path, lnum); |
| if (serial2 <= serial) |
| fatal("%s:%lu: invalid serial range " |
| "%llu:%llu", path, lnum, |
| (unsigned long long)serial, |
| (unsigned long long)serial2); |
| } |
| if (ssh_krl_revoke_cert_by_serial_range(krl, |
| ca, serial, serial2) != 0) { |
| fatal("%s: revoke serial failed", |
| __func__); |
| } |
| } else if (strncasecmp(cp, "id:", 3) == 0) { |
| if (ca == NULL && !wild_ca) { |
| fatal("revoking certificates by key ID " |
| "requires specification of a CA key"); |
| } |
| cp += 3; |
| cp = cp + strspn(cp, " \t"); |
| if (ssh_krl_revoke_cert_by_key_id(krl, ca, cp) != 0) |
| fatal("%s: revoke key ID failed", __func__); |
| } else if (strncasecmp(cp, "hash:", 5) == 0) { |
| cp += 5; |
| cp = cp + strspn(cp, " \t"); |
| hash_to_blob(cp, &blob, &blen, file, lnum); |
| r = ssh_krl_revoke_key_sha256(krl, blob, blen); |
| } else { |
| if (strncasecmp(cp, "key:", 4) == 0) { |
| cp += 4; |
| cp = cp + strspn(cp, " \t"); |
| was_explicit_key = 1; |
| } else if (strncasecmp(cp, "sha1:", 5) == 0) { |
| cp += 5; |
| cp = cp + strspn(cp, " \t"); |
| was_sha1 = 1; |
| } else if (strncasecmp(cp, "sha256:", 7) == 0) { |
| cp += 7; |
| cp = cp + strspn(cp, " \t"); |
| was_sha256 = 1; |
| /* |
| * Just try to process the line as a key. |
| * Parsing will fail if it isn't. |
| */ |
| } |
| if ((key = sshkey_new(KEY_UNSPEC)) == NULL) |
| fatal("sshkey_new"); |
| if ((r = sshkey_read(key, &cp)) != 0) |
| fatal("%s:%lu: invalid key: %s", |
| path, lnum, ssh_err(r)); |
| if (was_explicit_key) |
| r = ssh_krl_revoke_key_explicit(krl, key); |
| else if (was_sha1) { |
| if (sshkey_fingerprint_raw(key, |
| SSH_DIGEST_SHA1, &blob, &blen) != 0) { |
| fatal("%s:%lu: fingerprint failed", |
| file, lnum); |
| } |
| r = ssh_krl_revoke_key_sha1(krl, blob, blen); |
| } else if (was_sha256) { |
| if (sshkey_fingerprint_raw(key, |
| SSH_DIGEST_SHA256, &blob, &blen) != 0) { |
| fatal("%s:%lu: fingerprint failed", |
| file, lnum); |
| } |
| r = ssh_krl_revoke_key_sha256(krl, blob, blen); |
| } else |
| r = ssh_krl_revoke_key(krl, key); |
| if (r != 0) |
| fatal("%s: revoke key failed: %s", |
| __func__, ssh_err(r)); |
| freezero(blob, blen); |
| blob = NULL; |
| blen = 0; |
| sshkey_free(key); |
| } |
| } |
| if (strcmp(path, "-") != 0) |
| fclose(krl_spec); |
| free(line); |
| free(path); |
| } |
| |
| static void |
| do_gen_krl(struct passwd *pw, int updating, const char *ca_key_path, |
| unsigned long long krl_version, const char *krl_comment, |
| int argc, char **argv) |
| { |
| struct ssh_krl *krl; |
| struct stat sb; |
| struct sshkey *ca = NULL; |
| int fd, i, r, wild_ca = 0; |
| char *tmp; |
| struct sshbuf *kbuf; |
| |
| if (*identity_file == '\0') |
| fatal("KRL generation requires an output file"); |
| if (stat(identity_file, &sb) == -1) { |
| if (errno != ENOENT) |
| fatal("Cannot access KRL \"%s\": %s", |
| identity_file, strerror(errno)); |
| if (updating) |
| fatal("KRL \"%s\" does not exist", identity_file); |
| } |
| if (ca_key_path != NULL) { |
| if (strcasecmp(ca_key_path, "none") == 0) |
| wild_ca = 1; |
| else { |
| tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); |
| if ((r = sshkey_load_public(tmp, &ca, NULL)) != 0) |
| fatal("Cannot load CA public key %s: %s", |
| tmp, ssh_err(r)); |
| free(tmp); |
| } |
| } |
| |
| if (updating) |
| load_krl(identity_file, &krl); |
| else if ((krl = ssh_krl_init()) == NULL) |
| fatal("couldn't create KRL"); |
| |
| if (krl_version != 0) |
| ssh_krl_set_version(krl, krl_version); |
| if (krl_comment != NULL) |
| ssh_krl_set_comment(krl, krl_comment); |
| |
| for (i = 0; i < argc; i++) |
| update_krl_from_file(pw, argv[i], wild_ca, ca, krl); |
| |
| if ((kbuf = sshbuf_new()) == NULL) |
| fatal("sshbuf_new failed"); |
| if (ssh_krl_to_blob(krl, kbuf, NULL, 0) != 0) |
| fatal("Couldn't generate KRL"); |
| if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) |
| fatal("open %s: %s", identity_file, strerror(errno)); |
| if (atomicio(vwrite, fd, sshbuf_mutable_ptr(kbuf), sshbuf_len(kbuf)) != |
| sshbuf_len(kbuf)) |
| fatal("write %s: %s", identity_file, strerror(errno)); |
| close(fd); |
| sshbuf_free(kbuf); |
| ssh_krl_free(krl); |
| sshkey_free(ca); |
| } |
| |
| static void |
| do_check_krl(struct passwd *pw, int argc, char **argv) |
| { |
| int i, r, ret = 0; |
| char *comment; |
| struct ssh_krl *krl; |
| struct sshkey *k; |
| |
| if (*identity_file == '\0') |
| fatal("KRL checking requires an input file"); |
| load_krl(identity_file, &krl); |
| for (i = 0; i < argc; i++) { |
| if ((r = sshkey_load_public(argv[i], &k, &comment)) != 0) |
| fatal("Cannot load public key %s: %s", |
| argv[i], ssh_err(r)); |
| r = ssh_krl_check_key(krl, k); |
| printf("%s%s%s%s: %s\n", argv[i], |
| *comment ? " (" : "", comment, *comment ? ")" : "", |
| r == 0 ? "ok" : "REVOKED"); |
| if (r != 0) |
| ret = 1; |
| sshkey_free(k); |
| free(comment); |
| } |
| ssh_krl_free(krl); |
| exit(ret); |
| } |
| |
| static struct sshkey * |
| load_sign_key(const char *keypath, const struct sshkey *pubkey) |
| { |
| size_t i, slen, plen = strlen(keypath); |
| char *privpath = xstrdup(keypath); |
| const char *suffixes[] = { "-cert.pub", ".pub", NULL }; |
| struct sshkey *ret = NULL, *privkey = NULL; |
| int r; |
| |
| /* |
| * If passed a public key filename, then try to locate the correponding |
| * private key. This lets us specify certificates on the command-line |
| * and have ssh-keygen find the appropriate private key. |
| */ |
| for (i = 0; suffixes[i]; i++) { |
| slen = strlen(suffixes[i]); |
| if (plen <= slen || |
| strcmp(privpath + plen - slen, suffixes[i]) != 0) |
| continue; |
| privpath[plen - slen] = '\0'; |
| debug("%s: %s looks like a public key, using private key " |
| "path %s instead", __func__, keypath, privpath); |
| } |
| if ((privkey = load_identity(privpath, NULL)) == NULL) { |
| error("Couldn't load identity %s", keypath); |
| goto done; |
| } |
| if (!sshkey_equal_public(pubkey, privkey)) { |
| error("Public key %s doesn't match private %s", |
| keypath, privpath); |
| goto done; |
| } |
| if (sshkey_is_cert(pubkey) && !sshkey_is_cert(privkey)) { |
| /* |
| * Graft the certificate onto the private key to make |
| * it capable of signing. |
| */ |
| if ((r = sshkey_to_certified(privkey)) != 0) { |
| error("%s: sshkey_to_certified: %s", __func__, |
| ssh_err(r)); |
| goto done; |
| } |
| if ((r = sshkey_cert_copy(pubkey, privkey)) != 0) { |
| error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r)); |
| goto done; |
| } |
| } |
| /* success */ |
| ret = privkey; |
| privkey = NULL; |
| done: |
| sshkey_free(privkey); |
| free(privpath); |
| return ret; |
| } |
| |
| static int |
| sign_one(struct sshkey *signkey, const char *filename, int fd, |
| const char *sig_namespace, sshsig_signer *signer, void *signer_ctx) |
| { |
| struct sshbuf *sigbuf = NULL, *abuf = NULL; |
| int r = SSH_ERR_INTERNAL_ERROR, wfd = -1, oerrno; |
| char *wfile = NULL; |
| char *asig = NULL; |
| |
| if (!quiet) { |
| if (fd == STDIN_FILENO) |
| fprintf(stderr, "Signing data on standard input\n"); |
| else |
| fprintf(stderr, "Signing file %s\n", filename); |
| } |
| if ((r = sshsig_sign_fd(signkey, NULL, fd, sig_namespace, |
| &sigbuf, signer, signer_ctx)) != 0) { |
| error("Signing %s failed: %s", filename, ssh_err(r)); |
| goto out; |
| } |
| if ((r = sshsig_armor(sigbuf, &abuf)) != 0) { |
| error("%s: sshsig_armor: %s", __func__, ssh_err(r)); |
| goto out; |
| } |
| if ((asig = sshbuf_dup_string(abuf)) == NULL) { |
| error("%s: buffer error", __func__); |
| r = SSH_ERR_ALLOC_FAIL; |
| goto out; |
| } |
| |
| if (fd == STDIN_FILENO) { |
| fputs(asig, stdout); |
| fflush(stdout); |
| } else { |
| xasprintf(&wfile, "%s.sig", filename); |
| if (confirm_overwrite(wfile)) { |
| if ((wfd = open(wfile, O_WRONLY|O_CREAT|O_TRUNC, |
| 0666)) == -1) { |
| oerrno = errno; |
| error("Cannot open %s: %s", |
| wfile, strerror(errno)); |
| errno = oerrno; |
| r = SSH_ERR_SYSTEM_ERROR; |
| goto out; |
| } |
| if (atomicio(vwrite, wfd, asig, |
| strlen(asig)) != strlen(asig)) { |
| oerrno = errno; |
| error("Cannot write to %s: %s", |
| wfile, strerror(errno)); |
| errno = oerrno; |
| r = SSH_ERR_SYSTEM_ERROR; |
| goto out; |
| } |
| if (!quiet) { |
| fprintf(stderr, "Write signature to %s\n", |
| wfile); |
| } |
| } |
| } |
| /* success */ |
| r = 0; |
| out: |
| free(wfile); |
| free(asig); |
| sshbuf_free(abuf); |
| sshbuf_free(sigbuf); |
| if (wfd != -1) |
| close(wfd); |
| return r; |
| } |
| |
| static int |
| sign(const char *keypath, const char *sig_namespace, int argc, char **argv) |
| { |
| int i, fd = -1, r, ret = -1; |
| int agent_fd = -1; |
| struct sshkey *pubkey = NULL, *privkey = NULL, *signkey = NULL; |
| sshsig_signer *signer = NULL; |
| |
| /* Check file arguments. */ |
| for (i = 0; i < argc; i++) { |
| if (strcmp(argv[i], "-") != 0) |
| continue; |
| if (i > 0 || argc > 1) |
| fatal("Cannot sign mix of paths and standard input"); |
| } |
| |
| if ((r = sshkey_load_public(keypath, &pubkey, NULL)) != 0) { |
| error("Couldn't load public key %s: %s", keypath, ssh_err(r)); |
| goto done; |
| } |
| |
| if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) |
| debug("Couldn't get agent socket: %s", ssh_err(r)); |
| else { |
| if ((r = ssh_agent_has_key(agent_fd, pubkey)) == 0) |
| signer = agent_signer; |
| else |
| debug("Couldn't find key in agent: %s", ssh_err(r)); |
| } |
| |
| if (signer == NULL) { |
| /* Not using agent - try to load private key */ |
| if ((privkey = load_sign_key(keypath, pubkey)) == NULL) |
| goto done; |
| signkey = privkey; |
| } else { |
| /* Will use key in agent */ |
| signkey = pubkey; |
| } |
| |
| if (argc == 0) { |
| if ((r = sign_one(signkey, "(stdin)", STDIN_FILENO, |
| sig_namespace, signer, &agent_fd)) != 0) |
| goto done; |
| } else { |
| for (i = 0; i < argc; i++) { |
| if (strcmp(argv[i], "-") == 0) |
| fd = STDIN_FILENO; |
| else if ((fd = open(argv[i], O_RDONLY)) == -1) { |
| error("Cannot open %s for signing: %s", |
| argv[i], strerror(errno)); |
| goto done; |
| } |
| if ((r = sign_one(signkey, argv[i], fd, sig_namespace, |
| signer, &agent_fd)) != 0) |
| goto done; |
| if (fd != STDIN_FILENO) |
| close(fd); |
| fd = -1; |
| } |
| } |
| |
| ret = 0; |
| done: |
| if (fd != -1 && fd != STDIN_FILENO) |
| close(fd); |
| sshkey_free(pubkey); |
| sshkey_free(privkey); |
| return ret; |
| } |
| |
| static int |
| verify(const char *signature, const char *sig_namespace, const char *principal, |
| const char *allowed_keys, const char *revoked_keys) |
| { |
| int r, ret = -1, sigfd = -1; |
| struct sshbuf *sigbuf = NULL, *abuf = NULL; |
| struct sshkey *sign_key = NULL; |
| char *fp = NULL; |
| |
| if ((abuf = sshbuf_new()) == NULL) |
| fatal("%s: sshbuf_new() failed", __func__); |
| |
| if ((sigfd = open(signature, O_RDONLY)) < 0) { |
| error("Couldn't open signature file %s", signature); |
| goto done; |
| } |
| |
| if ((r = sshkey_load_file(sigfd, abuf)) != 0) { |
| error("Couldn't read signature file: %s", ssh_err(r)); |
| goto done; |
| } |
| if ((r = sshsig_dearmor(abuf, &sigbuf)) != 0) { |
| error("%s: sshsig_armor: %s", __func__, ssh_err(r)); |
| return r; |
| } |
| if ((r = sshsig_verify_fd(sigbuf, STDIN_FILENO, sig_namespace, |
| &sign_key)) != 0) |
| goto done; /* sshsig_verify() prints error */ |
| |
| if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, |
| SSH_FP_DEFAULT)) == NULL) |
| fatal("%s: sshkey_fingerprint failed", __func__); |
| debug("Valid (unverified) signature from key %s", fp); |
| free(fp); |
| fp = NULL; |
| |
| if (revoked_keys != NULL) { |
| if ((r = sshkey_check_revoked(sign_key, revoked_keys)) != 0) { |
| debug3("sshkey_check_revoked failed: %s", ssh_err(r)); |
| goto done; |
| } |
| } |
| |
| if ((r = sshsig_check_allowed_keys(allowed_keys, sign_key, |
| principal, sig_namespace)) != 0) { |
| debug3("sshsig_check_allowed_keys failed: %s", ssh_err(r)); |
| goto done; |
| } |
| /* success */ |
| ret = 0; |
| done: |
| if (!quiet) { |
| if (ret == 0) { |
| if ((fp = sshkey_fingerprint(sign_key, fingerprint_hash, |
| SSH_FP_DEFAULT)) == NULL) { |
| fatal("%s: sshkey_fingerprint failed", |
| __func__); |
| } |
| printf("Good \"%s\" signature for %s with %s key %s\n", |
| sig_namespace, principal, |
| sshkey_type(sign_key), fp); |
| } else { |
| printf("Could not verify signature.\n"); |
| } |
| } |
| if (sigfd != -1) |
| close(sigfd); |
| sshbuf_free(sigbuf); |
| sshbuf_free(abuf); |
| sshkey_free(sign_key); |
| free(fp); |
| return ret; |
| } |
| |
| static void |
| usage(void) |
| { |
| fprintf(stderr, |
| "usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa] [-m format]\n" |
| " [-N new_passphrase] [-C comment] [-f output_keyfile]\n" |
| " ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-m format]\n" |
| " [-f keyfile]\n" |
| " ssh-keygen -i [-m key_format] [-f input_keyfile]\n" |
| " ssh-keygen -e [-m key_format] [-f input_keyfile]\n" |
| " ssh-keygen -y [-f input_keyfile]\n" |
| " ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]\n" |
| " ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]\n" |
| " ssh-keygen -B [-f input_keyfile]\n"); |
| #ifdef ENABLE_PKCS11 |
| fprintf(stderr, |
| " ssh-keygen -D pkcs11\n"); |
| #endif |
| fprintf(stderr, |
| " ssh-keygen -F hostname [-f known_hosts_file] [-l]\n" |
| " ssh-keygen -H [-f known_hosts_file]\n" |
| " ssh-keygen -R hostname [-f known_hosts_file]\n" |
| " ssh-keygen -r hostname [-f input_keyfile] [-g]\n" |
| #ifdef WITH_OPENSSL |
| " ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]\n" |
| " ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]\n" |
| " [-j start_line] [-K checkpt] [-W generator]\n" |
| #endif |
| " ssh-keygen -s ca_key -I certificate_identity [-h] [-U]\n" |
| " [-D pkcs11_provider] [-n principals] [-O option]\n" |
| " [-V validity_interval] [-z serial_number] file ...\n" |
| " ssh-keygen -L [-f input_keyfile]\n" |
| " ssh-keygen -A\n" |
| " ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]\n" |
| " file ...\n" |
| " ssh-keygen -Q -f le file ...\n" |
| " ssh-keygen -Y sign -f sign_key -n namespace\n" |
| " ssh-keygen -Y verify -I signer_identity -s signature_file\n" |
| " -n namespace -f allowed_keys [-r revoked_keys]\n"); |
| exit(1); |
| } |
| |
| /* |
| * Main program for key management. |
| */ |
| int |
| main(int argc, char **argv) |
| { |
| char dotsshdir[PATH_MAX], comment[1024], *passphrase1, *passphrase2; |
| char *rr_hostname = NULL, *ep, *fp, *ra; |
| struct sshkey *private, *public; |
| struct passwd *pw; |
| struct stat st; |
| int r, opt, type, fd; |
| int change_passphrase = 0, change_comment = 0, show_cert = 0; |
| int find_host = 0, delete_host = 0, hash_hosts = 0; |
| int gen_all_hostkeys = 0, gen_krl = 0, update_krl = 0, check_krl = 0; |
| int prefer_agent = 0, convert_to = 0, convert_from = 0; |
| int print_public = 0, print_generic = 0, cert_serial_autoinc = 0; |
| unsigned long long cert_serial = 0; |
| char *identity_comment = NULL, *ca_key_path = NULL; |
| u_int32_t bits = 0; |
| FILE *f; |
| const char *errstr; |
| int log_level = SYSLOG_LEVEL_INFO; |
| char *sign_op = NULL; |
| #ifdef WITH_OPENSSL |
| /* Moduli generation/screening */ |
| char out_file[PATH_MAX], *checkpoint = NULL; |
| u_int32_t memory = 0, generator_wanted = 0; |
| int do_gen_candidates = 0, do_screen_candidates = 0; |
| unsigned long start_lineno = 0, lines_to_process = 0; |
| BIGNUM *start = NULL; |
| #endif |
| |
| extern int optind; |
| extern char *optarg; |
| |
| /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
| sanitise_stdfd(); |
| |
| __progname = ssh_get_progname(argv[0]); |
| |
| seed_rng(); |
| |
| log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); |
| |
| msetlocale(); |
| |
| /* we need this for the home * directory. */ |
| pw = getpwuid(getuid()); |
| if (!pw) |
| fatal("No user exists for uid %lu", (u_long)getuid()); |
| if (gethostname(hostname, sizeof(hostname)) == -1) |
| fatal("gethostname: %s", strerror(errno)); |
| |
| /* Remaining characters: dw */ |
| while ((opt = getopt(argc, argv, "ABHLQUXceghiklopquvxy" |
| "C:D:E:F:G:I:J:K:M:N:O:P:R:S:T:V:W:Y:Z:" |
| "a:b:f:g:j:m:n:r:s:t:z:")) != -1) { |
| switch (opt) { |
| case 'A': |
| gen_all_hostkeys = 1; |
| break; |
| case 'b': |
| bits = (u_int32_t)strtonum(optarg, 1, UINT32_MAX, |
| &errstr); |
| if (errstr) |
| fatal("Bits has bad value %s (%s)", |
| optarg, errstr); |
| break; |
| case 'E': |
| fingerprint_hash = ssh_digest_alg_by_name(optarg); |
| if (fingerprint_hash == -1) |
| fatal("Invalid hash algorithm \"%s\"", optarg); |
| break; |
| case 'F': |
| find_host = 1; |
| rr_hostname = optarg; |
| break; |
| case 'H': |
| hash_hosts = 1; |
| break; |
| case 'I': |
| cert_key_id = optarg; |
| break; |
| case 'R': |
| delete_host = 1; |
| rr_hostname = optarg; |
| break; |
| case 'L': |
| show_cert = 1; |
| break; |
| case 'l': |
| print_fingerprint = 1; |
| break; |
| case 'B': |
| print_bubblebabble = 1; |
| break; |
| case 'm': |
| if (strcasecmp(optarg, "RFC4716") == 0 || |
| strcasecmp(optarg, "ssh2") == 0) { |
| convert_format = FMT_RFC4716; |
| break; |
| } |
| if (strcasecmp(optarg, "PKCS8") == 0) { |
| convert_format = FMT_PKCS8; |
| private_key_format = SSHKEY_PRIVATE_PKCS8; |
| break; |
| } |
| if (strcasecmp(optarg, "PEM") == 0) { |
| convert_format = FMT_PEM; |
| private_key_format = SSHKEY_PRIVATE_PEM; |
| break; |
| } |
| fatal("Unsupported conversion format \"%s\"", optarg); |
| case 'n': |
| cert_principals = optarg; |
| break; |
| case 'o': |
| /* no-op; new format is already the default */ |
| break; |
| case 'p': |
| change_passphrase = 1; |
| break; |
| case 'c': |
| change_comment = 1; |
| break; |
| case 'f': |
| if (strlcpy(identity_file, optarg, |
| sizeof(identity_file)) >= sizeof(identity_file)) |
| fatal("Identity filename too long"); |
| have_identity = 1; |
| break; |
| case 'g': |
| print_generic = 1; |
| break; |
| case 'P': |
| identity_passphrase = optarg; |
| break; |
| case 'N': |
| identity_new_passphrase = optarg; |
| break; |
| case 'Q': |
| check_krl = 1; |
| break; |
| case 'O': |
| add_cert_option(optarg); |
| break; |
| case 'Z': |
| openssh_format_cipher = optarg; |
| break; |
| case 'C': |
| identity_comment = optarg; |
| break; |
| case 'q': |
| quiet = 1; |
| break; |
| case 'e': |
| case 'x': |
| /* export key */ |
| convert_to = 1; |
| break; |
| case 'h': |
| cert_key_type = SSH2_CERT_TYPE_HOST; |
| certflags_flags = 0; |
| break; |
| case 'k': |
| gen_krl = 1; |
| break; |
| case 'i': |
| case 'X': |
| /* import key */ |
| convert_from = 1; |
| break; |
| case 'y': |
| print_public = 1; |
| break; |
| case 's': |
| ca_key_path = optarg; |
| break; |
| case 't': |
| key_type_name = optarg; |
| break; |
| case 'D': |
| pkcs11provider = optarg; |
| break; |
| case 'U': |
| prefer_agent = 1; |
| break; |
| case 'u': |
| update_krl = 1; |
| break; |
| case 'v': |
| if (log_level == SYSLOG_LEVEL_INFO) |
| log_level = SYSLOG_LEVEL_DEBUG1; |
| else { |
| if (log_level >= SYSLOG_LEVEL_DEBUG1 && |
| log_level < SYSLOG_LEVEL_DEBUG3) |
| log_level++; |
| } |
| break; |
| case 'r': |
| rr_hostname = optarg; |
| break; |
| case 'a': |
| rounds = (int)strtonum(optarg, 1, INT_MAX, &errstr); |
| if (errstr) |
| fatal("Invalid number: %s (%s)", |
| optarg, errstr); |
| break; |
| case 'V': |
| parse_cert_times(optarg); |
| break; |
| case 'Y': |
| sign_op = optarg; |
| break; |
| case 'z': |
| errno = 0; |
| if (*optarg == '+') { |
| cert_serial_autoinc = 1; |
| optarg++; |
| } |
| cert_serial = strtoull(optarg, &ep, 10); |
| if (*optarg < '0' || *optarg > '9' || *ep != '\0' || |
| (errno == ERANGE && cert_serial == ULLONG_MAX)) |
| fatal("Invalid serial number \"%s\"", optarg); |
| break; |
| #ifdef WITH_OPENSSL |
| /* Moduli generation/screening */ |
| case 'G': |
| do_gen_candidates = 1; |
| if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
| sizeof(out_file)) |
| fatal("Output filename too long"); |
| break; |
| case 'J': |
| lines_to_process = strtoul(optarg, NULL, 10); |
| break; |
| case 'j': |
| start_lineno = strtoul(optarg, NULL, 10); |
| break; |
| case 'K': |
| if (strlen(optarg) >= PATH_MAX) |
| fatal("Checkpoint filename too long"); |
| checkpoint = xstrdup(optarg); |
| break; |
| case 'M': |
| memory = (u_int32_t)strtonum(optarg, 1, UINT_MAX, |
| &errstr); |
| if (errstr) |
| fatal("Memory limit is %s: %s", errstr, optarg); |
| break; |
| case 'S': |
| /* XXX - also compare length against bits */ |
| if (BN_hex2bn(&start, optarg) == 0) |
| fatal("Invalid start point."); |
| break; |
| case 'T': |
| do_screen_candidates = 1; |
| if (strlcpy(out_file, optarg, sizeof(out_file)) >= |
| sizeof(out_file)) |
| fatal("Output filename too long"); |
| break; |
| case 'W': |
| generator_wanted = (u_int32_t)strtonum(optarg, 1, |
| UINT_MAX, &errstr); |
| if (errstr != NULL) |
| fatal("Desired generator invalid: %s (%s)", |
| optarg, errstr); |
| break; |
| #endif /* WITH_OPENSSL */ |
| case '?': |
| default: |
| usage(); |
| } |
| } |
| |
| /* reinit */ |
| log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); |
| |
| argv += optind; |
| argc -= optind; |
| |
| if (sign_op != NULL) { |
| if (cert_principals == NULL) { |
| error("Too few arguments for sign/verify: " |
| "missing namespace"); |
| exit(1); |
| } |
| if (strncmp(sign_op, "sign", 4) == 0) { |
| if (!have_identity) { |
| error("Too few arguments for sign: " |
| "missing key"); |
| exit(1); |
| } |
| return sign(identity_file, cert_principals, argc, argv); |
| } else if (strncmp(sign_op, "verify", 6) == 0) { |
| if (ca_key_path == NULL) { |
| error("Too few arguments for verify: " |
| "missing signature file"); |
| exit(1); |
| } |
| if (!have_identity) { |
| error("Too few arguments for sign: " |
| "missing allowed keys file"); |
| exit(1); |
| } |
| if (cert_key_id == NULL) { |
| error("Too few arguments for verify: " |
| "missing principal ID"); |
| exit(1); |
| } |
| return verify(ca_key_path, cert_principals, |
| cert_key_id, identity_file, rr_hostname); |
| } |
| usage(); |
| /* NOTREACHED */ |
| } |
| |
| if (ca_key_path != NULL) { |
| if (argc < 1 && !gen_krl) { |
| error("Too few arguments."); |
| usage(); |
| } |
| } else if (argc > 0 && !gen_krl && !check_krl) { |
| error("Too many arguments."); |
| usage(); |
| } |
| if (change_passphrase && change_comment) { |
| error("Can only have one of -p and -c."); |
| usage(); |
| } |
| if (print_fingerprint && (delete_host || hash_hosts)) { |
| error("Cannot use -l with -H or -R."); |
| usage(); |
| } |
| if (gen_krl) { |
| do_gen_krl(pw, update_krl, ca_key_path, |
| cert_serial, identity_comment, argc, argv); |
| return (0); |
| } |
| if (check_krl) { |
| do_check_krl(pw, argc, argv); |
| return (0); |
| } |
| if (ca_key_path != NULL) { |
| if (cert_key_id == NULL) |
| fatal("Must specify key id (-I) when certifying"); |
| do_ca_sign(pw, ca_key_path, prefer_agent, |
| cert_serial, cert_serial_autoinc, argc, argv); |
| } |
| if (show_cert) |
| do_show_cert(pw); |
| if (delete_host || hash_hosts || find_host) { |
| do_known_hosts(pw, rr_hostname, find_host, |
| delete_host, hash_hosts); |
| } |
| if (pkcs11provider != NULL) |
| do_download(pw); |
| if (print_fingerprint || print_bubblebabble) |
| do_fingerprint(pw); |
| if (change_passphrase) |
| do_change_passphrase(pw); |
| if (change_comment) |
| do_change_comment(pw, identity_comment); |
| #ifdef WITH_OPENSSL |
| if (convert_to) |
| do_convert_to(pw); |
| if (convert_from) |
| do_convert_from(pw); |
| #endif |
| if (print_public) |
| do_print_public(pw); |
| if (rr_hostname != NULL) { |
| unsigned int n = 0; |
| |
| if (have_identity) { |
| n = do_print_resource_record(pw, identity_file, |
| rr_hostname, print_generic); |
| if (n == 0) |
| fatal("%s: %s", identity_file, strerror(errno)); |
| exit(0); |
| } else { |
| |
| n += do_print_resource_record(pw, |
| _PATH_HOST_RSA_KEY_FILE, rr_hostname, |
| print_generic); |
| n += do_print_resource_record(pw, |
| _PATH_HOST_DSA_KEY_FILE, rr_hostname, |
| print_generic); |
| n += do_print_resource_record(pw, |
| _PATH_HOST_ECDSA_KEY_FILE, rr_hostname, |
| print_generic); |
| n += do_print_resource_record(pw, |
| _PATH_HOST_ED25519_KEY_FILE, rr_hostname, |
| print_generic); |
| n += do_print_resource_record(pw, |
| _PATH_HOST_XMSS_KEY_FILE, rr_hostname, |
| print_generic); |
| if (n == 0) |
| fatal("no keys found."); |
| exit(0); |
| } |
| } |
| |
| #ifdef WITH_OPENSSL |
| if (do_gen_candidates) { |
| FILE *out = fopen(out_file, "w"); |
| |
| if (out == NULL) { |
| error("Couldn't open modulus candidate file \"%s\": %s", |
| out_file, strerror(errno)); |
| return (1); |
| } |
| if (bits == 0) |
| bits = DEFAULT_BITS; |
| if (gen_candidates(out, memory, bits, start) != 0) |
| fatal("modulus candidate generation failed"); |
| |
| return (0); |
| } |
| |
| if (do_screen_candidates) { |
| FILE *in; |
| FILE *out = fopen(out_file, "a"); |
| |
| if (have_identity && strcmp(identity_file, "-") != 0) { |
| if ((in = fopen(identity_file, "r")) == NULL) { |
| fatal("Couldn't open modulus candidate " |
| "file \"%s\": %s", identity_file, |
| strerror(errno)); |
| } |
| } else |
| in = stdin; |
| |
| if (out == NULL) { |
| fatal("Couldn't open moduli file \"%s\": %s", |
| out_file, strerror(errno)); |
| } |
| if (prime_test(in, out, rounds == 0 ? 100 : rounds, |
| generator_wanted, checkpoint, |
| start_lineno, lines_to_process) != 0) |
| fatal("modulus screening failed"); |
| return (0); |
| } |
| #endif |
| |
| if (gen_all_hostkeys) { |
| do_gen_all_hostkeys(pw); |
| return (0); |
| } |
| |
| if (key_type_name == NULL) |
| key_type_name = DEFAULT_KEY_TYPE_NAME; |
| |
| type = sshkey_type_from_name(key_type_name); |
| type_bits_valid(type, key_type_name, &bits); |
| |
| if (!quiet) |
| printf("Generating public/private %s key pair.\n", |
| key_type_name); |
| if ((r = sshkey_generate(type, bits, &private)) != 0) |
| fatal("sshkey_generate failed"); |
| if ((r = sshkey_from_private(private, &public)) != 0) |
| fatal("sshkey_from_private failed: %s\n", ssh_err(r)); |
| |
| if (!have_identity) |
| ask_filename(pw, "Enter file in which to save the key"); |
| |
| /* Create ~/.ssh directory if it doesn't already exist. */ |
| snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", |
| pw->pw_dir, _PATH_SSH_USER_DIR); |
| if (strstr(identity_file, dotsshdir) != NULL) { |
| if (stat(dotsshdir, &st) == -1) { |
| if (errno != ENOENT) { |
| error("Could not stat %s: %s", dotsshdir, |
| strerror(errno)); |
| } else if (mkdir(dotsshdir, 0700) == -1) { |
| error("Could not create directory '%s': %s", |
| dotsshdir, strerror(errno)); |
| } else if (!quiet) |
| printf("Created directory '%s'.\n", dotsshdir); |
| } |
| } |
| /* If the file already exists, ask the user to confirm. */ |
| if (!confirm_overwrite(identity_file)) |
| exit(1); |
| /* Ask for a passphrase (twice). */ |
| if (identity_passphrase) |
| passphrase1 = xstrdup(identity_passphrase); |
| else if (identity_new_passphrase) |
| passphrase1 = xstrdup(identity_new_passphrase); |
| else { |
| passphrase_again: |
| passphrase1 = |
| read_passphrase("Enter passphrase (empty for no " |
| "passphrase): ", RP_ALLOW_STDIN); |
| passphrase2 = read_passphrase("Enter same passphrase again: ", |
| RP_ALLOW_STDIN); |
| if (strcmp(passphrase1, passphrase2) != 0) { |
| /* |
| * The passphrases do not match. Clear them and |
| * retry. |
| */ |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| explicit_bzero(passphrase2, strlen(passphrase2)); |
| free(passphrase1); |
| free(passphrase2); |
| printf("Passphrases do not match. Try again.\n"); |
| goto passphrase_again; |
| } |
| /* Clear the other copy of the passphrase. */ |
| explicit_bzero(passphrase2, strlen(passphrase2)); |
| free(passphrase2); |
| } |
| |
| if (identity_comment) { |
| strlcpy(comment, identity_comment, sizeof(comment)); |
| } else { |
| /* Create default comment field for the passphrase. */ |
| snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname); |
| } |
| |
| /* Save the key with the given passphrase and comment. */ |
| if ((r = sshkey_save_private(private, identity_file, passphrase1, |
| comment, private_key_format, openssh_format_cipher, rounds)) != 0) { |
| error("Saving key \"%s\" failed: %s", |
| identity_file, ssh_err(r)); |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| free(passphrase1); |
| exit(1); |
| } |
| /* Clear the passphrase. */ |
| explicit_bzero(passphrase1, strlen(passphrase1)); |
| free(passphrase1); |
| |
| /* Clear the private key and the random number generator. */ |
| sshkey_free(private); |
| |
| if (!quiet) |
| printf("Your identification has been saved in %s.\n", identity_file); |
| |
| strlcat(identity_file, ".pub", sizeof(identity_file)); |
| if ((fd = open(identity_file, O_WRONLY|O_CREAT|O_TRUNC, 0644)) == -1) |
| fatal("Unable to save public key to %s: %s", |
| identity_file, strerror(errno)); |
| if ((f = fdopen(fd, "w")) == NULL) |
| fatal("fdopen %s failed: %s", identity_file, strerror(errno)); |
| if ((r = sshkey_write(public, f)) != 0) |
| error("write key failed: %s", ssh_err(r)); |
| fprintf(f, " %s\n", comment); |
| if (ferror(f) || fclose(f) != 0) |
| fatal("write public failed: %s", strerror(errno)); |
| |
| if (!quiet) { |
| fp = sshkey_fingerprint(public, fingerprint_hash, |
| SSH_FP_DEFAULT); |
| ra = sshkey_fingerprint(public, fingerprint_hash, |
| SSH_FP_RANDOMART); |
| if (fp == NULL || ra == NULL) |
| fatal("sshkey_fingerprint failed"); |
| printf("Your public key has been saved in %s.\n", |
| identity_file); |
| printf("The key fingerprint is:\n"); |
| printf("%s %s\n", fp, comment); |
| printf("The key's randomart image is:\n"); |
| printf("%s\n", ra); |
| free(ra); |
| free(fp); |
| } |
| |
| sshkey_free(public); |
| exit(0); |
| } |