diff options
Diffstat (limited to 'ssh-keygen.c')
| -rw-r--r-- | ssh-keygen.c | 2370 |
1 files changed, 0 insertions, 2370 deletions
diff --git a/ssh-keygen.c b/ssh-keygen.c deleted file mode 100644 index 4b6218b1..00000000 --- a/ssh-keygen.c +++ /dev/null @@ -1,2370 +0,0 @@ -/* $OpenBSD: ssh-keygen.c,v 1.210 2011/04/18 00:46:05 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> -#include <sys/param.h> - -#include <openssl/evp.h> -#include <openssl/pem.h> -#include "openbsd-compat/openssl-compat.h" - -#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 "xmalloc.h" -#include "key.h" -#include "rsa.h" -#include "authfile.h" -#include "uuencode.h" -#include "buffer.h" -#include "pathnames.h" -#include "log.h" -#include "misc.h" -#include "match.h" -#include "hostfile.h" -#include "dns.h" -#include "ssh2.h" -#include "ssh-pkcs11.h" - -/* Number of bits in the RSA/DSA key. This value can be set on the command line. */ -#define DEFAULT_BITS 2048 -#define DEFAULT_BITS_DSA 1024 -#define DEFAULT_BITS_ECDSA 256 -u_int32_t bits = 0; - -/* - * Flag indicating that we just want to change the passphrase. This can be - * set on the command line. - */ -int change_passphrase = 0; - -/* - * Flag indicating that we just want to change the comment. This can be set - * on the command line. - */ -int change_comment = 0; - -int quiet = 0; - -int log_level = SYSLOG_LEVEL_INFO; - -/* Flag indicating that we want to hash a known_hosts file */ -int hash_hosts = 0; -/* Flag indicating that we want lookup a host in known_hosts file */ -int find_host = 0; -/* Flag indicating that we want to delete a host from a known_hosts file */ -int delete_host = 0; - -/* Flag indicating that we want to show the contents of a certificate */ -int show_cert = 0; - -/* Flag indicating that we just want to see the key fingerprint */ -int print_fingerprint = 0; -int print_bubblebabble = 0; - -/* The identity file name, given on the command line or entered by the user. */ -char identity_file[1024]; -int have_identity = 0; - -/* This is set to the passphrase if given on the command line. */ -char *identity_passphrase = NULL; - -/* This is set to the new passphrase if given on the command line. */ -char *identity_new_passphrase = NULL; - -/* This is set to the new comment if given on the command line. */ -char *identity_comment = NULL; - -/* Path to CA key when certifying keys. */ -char *ca_key_path = NULL; - -/* Certificate serial number */ -long long cert_serial = 0; - -/* Key type when certifying */ -u_int cert_key_type = SSH2_CERT_TYPE_USER; - -/* "key ID" of signed key */ -char *cert_key_id = NULL; - -/* Comma-separated list of principal names for certifying keys */ -char *cert_principals = NULL; - -/* Validity period for certificates */ -u_int64_t cert_valid_from = 0; -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) -u_int32_t certflags_flags = CERTOPT_DEFAULT; -char *certflags_command = NULL; -char *certflags_src_addr = NULL; - -/* Conversion to/from various formats */ -int convert_to = 0; -int convert_from = 0; -enum { - FMT_RFC4716, - FMT_PKCS8, - FMT_PEM -} convert_format = FMT_RFC4716; -int print_public = 0; -int print_generic = 0; - -char *key_type_name = NULL; - -/* Load key from this PKCS#11 provider */ -char *pkcs11provider = NULL; - -/* argv0 */ -extern char *__progname; - -char hostname[MAXHOSTNAMELEN]; - -/* moduli.c */ -int gen_candidates(FILE *, u_int32_t, u_int32_t, BIGNUM *); -int prime_test(FILE *, FILE *, u_int32_t, u_int32_t); - -static void -type_bits_valid(int type, u_int32_t *bitsp) -{ - u_int maxbits; - - if (type == KEY_UNSPEC) { - fprintf(stderr, "unknown key type %s\n", key_type_name); - exit(1); - } - if (*bitsp == 0) { - if (type == KEY_DSA) - *bitsp = DEFAULT_BITS_DSA; - else if (type == KEY_ECDSA) - *bitsp = DEFAULT_BITS_ECDSA; - else - *bitsp = DEFAULT_BITS; - } - maxbits = (type == KEY_DSA) ? - OPENSSL_DSA_MAX_MODULUS_BITS : OPENSSL_RSA_MAX_MODULUS_BITS; - if (*bitsp > maxbits) { - fprintf(stderr, "key bits exceeds maximum %d\n", maxbits); - exit(1); - } - if (type == KEY_DSA && *bitsp != 1024) - fatal("DSA keys must be 1024 bits"); - else if (type != KEY_ECDSA && *bitsp < 768) - fatal("Key must at least be 768 bits"); - else if (type == KEY_ECDSA && key_ecdsa_bits_to_nid(*bitsp) == -1) - fatal("Invalid ECDSA key length - valid lengths are " - "256, 384 or 521 bits"); -} - -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 (key_type_from_name(key_type_name)) { - case KEY_RSA1: - name = _PATH_SSH_CLIENT_IDENTITY; - break; - case KEY_DSA_CERT: - case KEY_DSA_CERT_V00: - 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_CERT_V00: - case KEY_RSA: - name = _PATH_SSH_CLIENT_ID_RSA; - break; - default: - fprintf(stderr, "bad key type\n"); - exit(1); - break; - } - } - snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name); - fprintf(stderr, "%s (%s): ", prompt, identity_file); - 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 Key * -load_identity(char *filename) -{ - char *pass; - Key *prv; - - prv = key_load_private(filename, "", NULL); - if (prv == NULL) { - if (identity_passphrase) - pass = xstrdup(identity_passphrase); - else - pass = read_passphrase("Enter passphrase: ", - RP_ALLOW_STDIN); - prv = key_load_private(filename, pass, NULL); - memset(pass, 0, strlen(pass)); - xfree(pass); - } - 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 - -static void -do_convert_to_ssh2(struct passwd *pw, Key *k) -{ - u_int len; - u_char *blob; - char comment[61]; - - if (key_to_blob(k, &blob, &len) <= 0) { - fprintf(stderr, "key_to_blob failed\n"); - exit(1); - } - /* 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", - key_size(k), key_type(k), - pw->pw_name, hostname); - - fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN); - fprintf(stdout, "Comment: \"%s\"\n", comment); - dump_base64(stdout, blob, len); - fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END); - key_free(k); - xfree(blob); - exit(0); -} - -static void -do_convert_to_pkcs8(Key *k) -{ - switch (key_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__, key_type(k)); - } - exit(0); -} - -static void -do_convert_to_pem(Key *k) -{ - switch (key_type_plain(k->type)) { - case KEY_RSA: - if (!PEM_write_RSAPublicKey(stdout, k->rsa)) - fatal("PEM_write_RSAPublicKey failed"); - break; -#if notyet /* OpenSSH 0.9.8 lacks this function */ - case KEY_DSA: - if (!PEM_write_DSAPublicKey(stdout, k->dsa)) - fatal("PEM_write_DSAPublicKey failed"); - break; -#endif - /* XXX ECDSA? */ - default: - fatal("%s: unsupported key type %s", __func__, key_type(k)); - } - exit(0); -} - -static void -do_convert_to(struct passwd *pw) -{ - Key *k; - struct stat st; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) - fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - if ((k = key_load_public(identity_file, NULL)) == NULL) { - if ((k = load_identity(identity_file)) == NULL) { - fprintf(stderr, "load failed\n"); - exit(1); - } - } - if (k->type == KEY_RSA1) { - fprintf(stderr, "version 1 keys are not supported\n"); - exit(1); - } - - 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); -} - -static void -buffer_get_bignum_bits(Buffer *b, BIGNUM *value) -{ - u_int bignum_bits = buffer_get_int(b); - u_int bytes = (bignum_bits + 7) / 8; - - if (buffer_len(b) < bytes) - fatal("buffer_get_bignum_bits: input buffer too small: " - "need %d have %d", bytes, buffer_len(b)); - if (BN_bin2bn(buffer_ptr(b), bytes, value) == NULL) - fatal("buffer_get_bignum_bits: BN_bin2bn failed"); - buffer_consume(b, bytes); -} - -static Key * -do_convert_private_ssh2_from_blob(u_char *blob, u_int blen) -{ - Buffer b; - Key *key = NULL; - char *type, *cipher; - u_char *sig, data[] = "abcde12345"; - int magic, rlen, ktype, i1, i2, i3, i4; - u_int slen; - u_long e; - - buffer_init(&b); - buffer_append(&b, blob, blen); - - magic = buffer_get_int(&b); - if (magic != SSH_COM_PRIVATE_KEY_MAGIC) { - error("bad magic 0x%x != 0x%x", magic, SSH_COM_PRIVATE_KEY_MAGIC); - buffer_free(&b); - return NULL; - } - i1 = buffer_get_int(&b); - type = buffer_get_string(&b, NULL); - cipher = buffer_get_string(&b, NULL); - i2 = buffer_get_int(&b); - i3 = buffer_get_int(&b); - i4 = buffer_get_int(&b); - debug("ignore (%d %d %d %d)", i1, i2, i3, i4); - if (strcmp(cipher, "none") != 0) { - error("unsupported cipher %s", cipher); - xfree(cipher); - buffer_free(&b); - xfree(type); - return NULL; - } - xfree(cipher); - - if (strstr(type, "dsa")) { - ktype = KEY_DSA; - } else if (strstr(type, "rsa")) { - ktype = KEY_RSA; - } else { - buffer_free(&b); - xfree(type); - return NULL; - } - key = key_new_private(ktype); - xfree(type); - - switch (key->type) { - case KEY_DSA: - buffer_get_bignum_bits(&b, key->dsa->p); - buffer_get_bignum_bits(&b, key->dsa->g); - buffer_get_bignum_bits(&b, key->dsa->q); - buffer_get_bignum_bits(&b, key->dsa->pub_key); - buffer_get_bignum_bits(&b, key->dsa->priv_key); - break; - case KEY_RSA: - e = buffer_get_char(&b); - debug("e %lx", e); - if (e < 30) { - e <<= 8; - e += buffer_get_char(&b); - debug("e %lx", e); - e <<= 8; - e += buffer_get_char(&b); - debug("e %lx", e); - } - if (!BN_set_word(key->rsa->e, e)) { - buffer_free(&b); - key_free(key); - return NULL; - } - buffer_get_bignum_bits(&b, key->rsa->d); - buffer_get_bignum_bits(&b, key->rsa->n); - buffer_get_bignum_bits(&b, key->rsa->iqmp); - buffer_get_bignum_bits(&b, key->rsa->q); - buffer_get_bignum_bits(&b, key->rsa->p); - rsa_generate_additional_parameters(key->rsa); - break; - } - rlen = buffer_len(&b); - if (rlen != 0) - error("do_convert_private_ssh2_from_blob: " - "remaining bytes in key blob %d", rlen); - buffer_free(&b); - - /* try the key */ - key_sign(key, &sig, &slen, data, sizeof(data)); - key_verify(key, sig, slen, data, sizeof(data)); - xfree(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) { - fprintf(stderr, "input line too long.\n"); - exit(1); - } - switch (c) { - case '\r': - c = fgetc(fp); - if (c != EOF && c != '\n' && ungetc(c, fp) == EOF) { - fprintf(stderr, "unget: %s\n", strerror(errno)); - exit(1); - } - 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, Key **k, int *private) -{ - int blen; - u_int len; - char line[1024]; - u_char blob[8096]; - char encoded[8096]; - int escaped = 0; - FILE *fp; - - 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 (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'; - blen = uudecode(encoded, blob, sizeof(blob)); - if (blen < 0) { - fprintf(stderr, "uudecode failed.\n"); - exit(1); - } - *k = *private ? - do_convert_private_ssh2_from_blob(blob, blen) : - key_from_blob(blob, blen); - if (*k == NULL) { - fprintf(stderr, "decode blob failed.\n"); - exit(1); - } - fclose(fp); -} - -static void -do_convert_from_pkcs8(Key **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_type(pubkey->type)) { - case EVP_PKEY_RSA: - *k = key_new(KEY_UNSPEC); - (*k)->type = KEY_RSA; - (*k)->rsa = EVP_PKEY_get1_RSA(pubkey); - break; - case EVP_PKEY_DSA: - *k = key_new(KEY_UNSPEC); - (*k)->type = KEY_DSA; - (*k)->dsa = EVP_PKEY_get1_DSA(pubkey); - break; -#ifdef OPENSSL_HAS_ECC - case EVP_PKEY_EC: - *k = key_new(KEY_UNSPEC); - (*k)->type = KEY_ECDSA; - (*k)->ecdsa = EVP_PKEY_get1_EC_KEY(pubkey); - (*k)->ecdsa_nid = key_ecdsa_key_to_nid((*k)->ecdsa); - break; -#endif - default: - fatal("%s: unsupported pubkey type %d", __func__, - EVP_PKEY_type(pubkey->type)); - } - EVP_PKEY_free(pubkey); - return; -} - -static void -do_convert_from_pem(Key **k, int *private) -{ - FILE *fp; - RSA *rsa; -#ifdef notyet - DSA *dsa; -#endif - - 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) { - *k = key_new(KEY_UNSPEC); - (*k)->type = KEY_RSA; - (*k)->rsa = rsa; - fclose(fp); - return; - } -#if notyet /* OpenSSH 0.9.8 lacks this function */ - rewind(fp); - if ((dsa = PEM_read_DSAPublicKey(fp, NULL, NULL, NULL)) != NULL) { - *k = key_new(KEY_UNSPEC); - (*k)->type = KEY_DSA; - (*k)->dsa = dsa; - fclose(fp); - return; - } - /* XXX ECDSA */ -#endif - fatal("%s: unrecognised raw private key format", __func__); -} - -static void -do_convert_from(struct passwd *pw) -{ - Key *k = NULL; - int 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) < 0) - 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) - ok = key_write(k, stdout); - 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__, - key_type(k)); - } - } - - if (!ok) { - fprintf(stderr, "key write failed\n"); - exit(1); - } - key_free(k); - exit(0); -} - -static void -do_print_public(struct passwd *pw) -{ - Key *prv; - struct stat st; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - prv = load_identity(identity_file); - if (prv == NULL) { - fprintf(stderr, "load failed\n"); - exit(1); - } - if (!key_write(prv, stdout)) - fprintf(stderr, "key_write failed"); - key_free(prv); - fprintf(stdout, "\n"); - exit(0); -} - -static void -do_download(struct passwd *pw) -{ -#ifdef ENABLE_PKCS11 - Key **keys = NULL; - int i, nkeys; - - pkcs11_init(0); - nkeys = pkcs11_add_provider(pkcs11provider, NULL, &keys); - if (nkeys <= 0) - fatal("cannot read public key from pkcs11"); - for (i = 0; i < nkeys; i++) { - key_write(keys[i], stdout); - key_free(keys[i]); - fprintf(stdout, "\n"); - } - xfree(keys); - pkcs11_terminate(); - exit(0); -#else - fatal("no pkcs11 support"); -#endif /* ENABLE_PKCS11 */ -} - -static void -do_fingerprint(struct passwd *pw) -{ - FILE *f; - Key *public; - char *comment = NULL, *cp, *ep, line[16*1024], *fp, *ra; - int i, skip = 0, num = 0, invalid = 1; - enum fp_rep rep; - enum fp_type fptype; - struct stat st; - - fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; - rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - public = key_load_public(identity_file, &comment); - if (public != NULL) { - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, comment, - key_type(public)); - if (log_level >= SYSLOG_LEVEL_VERBOSE) - printf("%s\n", ra); - key_free(public); - xfree(comment); - xfree(ra); - xfree(fp); - exit(0); - } - if (comment) { - xfree(comment); - comment = NULL; - } - - if ((f = fopen(identity_file, "r")) == NULL) - fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - - while (fgets(line, sizeof(line), f)) { - if ((cp = strchr(line, '\n')) == NULL) { - error("line %d too long: %.40s...", - num + 1, line); - skip = 1; - continue; - } - num++; - if (skip) { - skip = 0; - continue; - } - *cp = '\0'; - - /* Skip leading whitespace, empty and comment lines. */ - for (cp = line; *cp == ' ' || *cp == '\t'; cp++) - ; - if (!*cp || *cp == '\n' || *cp == '#') - continue; - 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'; - } - ep = cp; - public = key_new(KEY_RSA1); - if (key_read(public, &cp) != 1) { - cp = ep; - key_free(public); - public = key_new(KEY_UNSPEC); - if (key_read(public, &cp) != 1) { - key_free(public); - continue; - } - } - comment = *cp ? cp : comment; - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, - comment ? comment : "no comment", key_type(public)); - if (log_level >= SYSLOG_LEVEL_VERBOSE) - printf("%s\n", ra); - xfree(ra); - xfree(fp); - key_free(public); - invalid = 0; - } - fclose(f); - - if (invalid) { - printf("%s is not a public key file.\n", identity_file); - exit(1); - } - exit(0); -} - -static void -do_gen_all_hostkeys(struct passwd *pw) -{ - struct { - char *key_type; - char *key_type_display; - char *path; - } key_types[] = { - { "rsa1", "RSA1", _PATH_HOST_KEY_FILE }, - { "rsa", "RSA" ,_PATH_HOST_RSA_KEY_FILE }, - { "dsa", "DSA", _PATH_HOST_DSA_KEY_FILE }, - { "ecdsa", "ECDSA",_PATH_HOST_ECDSA_KEY_FILE }, - { NULL, NULL, NULL } - }; - - int first = 0; - struct stat st; - Key *private, *public; - char comment[1024]; - int i, type, fd; - FILE *f; - - for (i = 0; key_types[i].key_type; i++) { - if (stat(key_types[i].path, &st) == 0) - continue; - if (errno != ENOENT) { - printf("Could not stat %s: %s", key_types[i].path, - strerror(errno)); - first = 0; - continue; - } - - if (first == 0) { - first = 1; - printf("%s: generating new host keys: ", __progname); - } - printf("%s ", key_types[i].key_type_display); - fflush(stdout); - arc4random_stir(); - type = key_type_from_name(key_types[i].key_type); - strlcpy(identity_file, key_types[i].path, sizeof(identity_file)); - bits = 0; - type_bits_valid(type, &bits); - private = key_generate(type, bits); - if (private == NULL) { - fprintf(stderr, "key_generate failed\n"); - first = 0; - continue; - } - public = key_from_private(private); - snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, - hostname); - if (!key_save_private(private, identity_file, "", comment)) { - printf("Saving the key failed: %s.\n", identity_file); - key_free(private); - key_free(public); - first = 0; - continue; - } - key_free(private); - arc4random_stir(); - strlcat(identity_file, ".pub", sizeof(identity_file)); - fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Could not save your public key in %s\n", - identity_file); - key_free(public); - first = 0; - continue; - } - f = fdopen(fd, "w"); - if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - key_free(public); - first = 0; - continue; - } - if (!key_write(public, f)) { - fprintf(stderr, "write key failed\n"); - key_free(public); - first = 0; - continue; - } - fprintf(f, " %s\n", comment); - fclose(f); - key_free(public); - - } - if (first != 0) - printf("\n"); -} - -static void -printhost(FILE *f, const char *name, Key *public, int ca, int hash) -{ - if (print_fingerprint) { - enum fp_rep rep; - enum fp_type fptype; - char *fp, *ra; - - fptype = print_bubblebabble ? SSH_FP_SHA1 : SSH_FP_MD5; - rep = print_bubblebabble ? SSH_FP_BUBBLEBABBLE : SSH_FP_HEX; - fp = key_fingerprint(public, fptype, rep); - ra = key_fingerprint(public, SSH_FP_MD5, SSH_FP_RANDOMART); - printf("%u %s %s (%s)\n", key_size(public), fp, name, - key_type(public)); - if (log_level >= SYSLOG_LEVEL_VERBOSE) - printf("%s\n", ra); - xfree(ra); - xfree(fp); - } else { - if (hash && (name = host_hash(name, NULL, 0)) == NULL) - fatal("hash_host failed"); - fprintf(f, "%s%s%s ", ca ? CA_MARKER : "", ca ? " " : "", name); - if (!key_write(public, f)) - fatal("key_write failed"); - fprintf(f, "\n"); - } -} - -static void -do_known_hosts(struct passwd *pw, const char *name) -{ - FILE *in, *out = stdout; - Key *pub; - char *cp, *cp2, *kp, *kp2; - char line[16*1024], tmp[MAXPATHLEN], old[MAXPATHLEN]; - int c, skip = 0, inplace = 0, num = 0, invalid = 0, has_unhashed = 0; - int ca; - - 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"); - xfree(cp); - have_identity = 1; - } - if ((in = fopen(identity_file, "r")) == NULL) - fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - - /* - * 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 ((c = mkstemp(tmp)) == -1) - fatal("mkstemp: %s", strerror(errno)); - if ((out = fdopen(c, "w")) == NULL) { - c = errno; - unlink(tmp); - fatal("fdopen: %s", strerror(c)); - } - inplace = 1; - } - - while (fgets(line, sizeof(line), in)) { - if ((cp = strchr(line, '\n')) == NULL) { - error("line %d too long: %.40s...", num + 1, line); - skip = 1; - invalid = 1; - continue; - } - num++; - if (skip) { - skip = 0; - continue; - } - *cp = '\0'; - - /* Skip leading whitespace, empty and comment lines. */ - for (cp = line; *cp == ' ' || *cp == '\t'; cp++) - ; - if (!*cp || *cp == '\n' || *cp == '#') { - if (inplace) - fprintf(out, "%s\n", cp); - continue; - } - /* Check whether this is a CA key */ - if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 && - (cp[sizeof(CA_MARKER) - 1] == ' ' || - cp[sizeof(CA_MARKER) - 1] == '\t')) { - ca = 1; - cp += sizeof(CA_MARKER); - } else - ca = 0; - - /* Find the end of the host name portion. */ - for (kp = cp; *kp && *kp != ' ' && *kp != '\t'; kp++) - ; - - if (*kp == '\0' || *(kp + 1) == '\0') { - error("line %d missing key: %.40s...", - num, line); - invalid = 1; - continue; - } - *kp++ = '\0'; - kp2 = kp; - - pub = key_new(KEY_RSA1); - if (key_read(pub, &kp) != 1) { - kp = kp2; - key_free(pub); - pub = key_new(KEY_UNSPEC); - if (key_read(pub, &kp) != 1) { - error("line %d invalid key: %.40s...", - num, line); - key_free(pub); - invalid = 1; - continue; - } - } - - if (*cp == HASH_DELIM) { - if (find_host || delete_host) { - cp2 = host_hash(name, cp, strlen(cp)); - if (cp2 == NULL) { - error("line %d: invalid hashed " - "name: %.64s...", num, line); - invalid = 1; - continue; - } - c = (strcmp(cp2, cp) == 0); - if (find_host && c) { - printf("# Host %s found: " - "line %d type %s%s\n", name, - num, key_type(pub), - ca ? " (CA key)" : ""); - printhost(out, cp, pub, ca, 0); - } - if (delete_host && !c && !ca) - printhost(out, cp, pub, ca, 0); - } else if (hash_hosts) - printhost(out, cp, pub, ca, 0); - } else { - if (find_host || delete_host) { - c = (match_hostname(name, cp, - strlen(cp)) == 1); - if (find_host && c) { - printf("# Host %s found: " - "line %d type %s%s\n", name, - num, key_type(pub), - ca ? " (CA key)" : ""); - printhost(out, name, pub, - ca, hash_hosts && !ca); - } - if (delete_host && !c && !ca) - printhost(out, cp, pub, ca, 0); - } else if (hash_hosts) { - for (cp2 = strsep(&cp, ","); - cp2 != NULL && *cp2 != '\0'; - cp2 = strsep(&cp, ",")) { - if (ca) { - fprintf(stderr, "Warning: " - "ignoring CA key for host: " - "%.64s\n", cp2); - printhost(out, cp2, pub, ca, 0); - } else if (strcspn(cp2, "*?!") != - strlen(cp2)) { - fprintf(stderr, "Warning: " - "ignoring host name with " - "metacharacters: %.64s\n", - cp2); - printhost(out, cp2, pub, ca, 0); - } else - printhost(out, cp2, pub, ca, 1); - } - has_unhashed = 1; - } - } - key_free(pub); - } - fclose(in); - - if (invalid) { - fprintf(stderr, "%s is not a valid known_hosts file.\n", - identity_file); - if (inplace) { - fprintf(stderr, "Not replacing existing known_hosts " - "file because of errors\n"); - fclose(out); - unlink(tmp); - } - exit(1); - } - - if (inplace) { - fclose(out); - - /* 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); - } - - fprintf(stderr, "%s updated.\n", identity_file); - fprintf(stderr, "Original contents retained as %s\n", old); - if (has_unhashed) { - fprintf(stderr, "WARNING: %s contains unhashed " - "entries\n", old); - fprintf(stderr, "Delete this file to ensure privacy " - "of hostnames\n"); - } - } - - exit(0); -} - -/* - * 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; - Key *private; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - /* Try to load the file with empty passphrase. */ - private = key_load_private(identity_file, "", &comment); - if (private == NULL) { - if (identity_passphrase) - old_passphrase = xstrdup(identity_passphrase); - else - old_passphrase = - read_passphrase("Enter old passphrase: ", - RP_ALLOW_STDIN); - private = key_load_private(identity_file, old_passphrase, - &comment); - memset(old_passphrase, 0, strlen(old_passphrase)); - xfree(old_passphrase); - if (private == NULL) { - printf("Bad passphrase.\n"); - exit(1); - } - } - printf("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) { - memset(passphrase1, 0, strlen(passphrase1)); - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase1); - xfree(passphrase2); - printf("Pass phrases do not match. Try again.\n"); - exit(1); - } - /* Destroy the other copy. */ - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase2); - } - - /* Save the file using the new passphrase. */ - if (!key_save_private(private, identity_file, passphrase1, comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - key_free(private); - xfree(comment); - exit(1); - } - /* Destroy the passphrase and the copy of the key in memory. */ - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - key_free(private); /* Destroys contents */ - xfree(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) -{ - Key *public; - char *comment = NULL; - struct stat st; - - if (fname == NULL) - ask_filename(pw, "Enter file in which the key is"); - if (stat(fname, &st) < 0) { - if (errno == ENOENT) - return 0; - perror(fname); - exit(1); - } - public = key_load_public(fname, &comment); - if (public != NULL) { - export_dns_rr(hname, public, stdout, print_generic); - key_free(public); - xfree(comment); - return 1; - } - if (comment) - xfree(comment); - - printf("failed to read v2 public key from %s.\n", fname); - exit(1); -} - -/* - * Change the comment of a private key file. - */ -static void -do_change_comment(struct passwd *pw) -{ - char new_comment[1024], *comment, *passphrase; - Key *private; - Key *public; - struct stat st; - FILE *f; - int fd; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) { - perror(identity_file); - exit(1); - } - private = key_load_private(identity_file, "", &comment); - if (private == NULL) { - 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. */ - private = key_load_private(identity_file, passphrase, &comment); - if (private == NULL) { - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - printf("Bad passphrase.\n"); - exit(1); - } - } else { - passphrase = xstrdup(""); - } - if (private->type != KEY_RSA1) { - fprintf(stderr, "Comments are only supported for RSA1 keys.\n"); - key_free(private); - exit(1); - } - printf("Key now has comment '%s'\n", comment); - - if (identity_comment) { - strlcpy(new_comment, identity_comment, sizeof(new_comment)); - } else { - printf("Enter new comment: "); - fflush(stdout); - if (!fgets(new_comment, sizeof(new_comment), stdin)) { - memset(passphrase, 0, strlen(passphrase)); - key_free(private); - exit(1); - } - new_comment[strcspn(new_comment, "\n")] = '\0'; - } - - /* Save the file using the new passphrase. */ - if (!key_save_private(private, identity_file, passphrase, new_comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - key_free(private); - xfree(comment); - exit(1); - } - memset(passphrase, 0, strlen(passphrase)); - xfree(passphrase); - public = key_from_private(private); - key_free(private); - - strlcat(identity_file, ".pub", sizeof(identity_file)); - fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Could not save your public key in %s\n", identity_file); - exit(1); - } - f = fdopen(fd, "w"); - if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - exit(1); - } - if (!key_write(public, f)) - fprintf(stderr, "write key failed\n"); - key_free(public); - fprintf(f, " %s\n", new_comment); - fclose(f); - - xfree(comment); - - printf("The comment in your key file has been changed.\n"); - exit(0); -} - -static const char * -fmt_validity(u_int64_t valid_from, u_int64_t valid_to) -{ - char from[32], to[32]; - static char ret[64]; - time_t tt; - struct tm *tm; - - *from = *to = '\0'; - if (valid_from == 0 && valid_to == 0xffffffffffffffffULL) - return "forever"; - - if (valid_from != 0) { - /* XXX revisit INT_MAX in 2038 :) */ - tt = valid_from > INT_MAX ? INT_MAX : valid_from; - tm = localtime(&tt); - strftime(from, sizeof(from), "%Y-%m-%dT%H:%M:%S", tm); - } - if (valid_to != 0xffffffffffffffffULL) { - /* XXX revisit INT_MAX in 2038 :) */ - tt = valid_to > INT_MAX ? INT_MAX : valid_to; - tm = localtime(&tt); - strftime(to, sizeof(to), "%Y-%m-%dT%H:%M:%S", tm); - } - - if (valid_from == 0) { - snprintf(ret, sizeof(ret), "before %s", to); - return ret; - } - if (valid_to == 0xffffffffffffffffULL) { - snprintf(ret, sizeof(ret), "after %s", from); - return ret; - } - - snprintf(ret, sizeof(ret), "from %s to %s", from, to); - return ret; -} - -static void -add_flag_option(Buffer *c, const char *name) -{ - debug3("%s: %s", __func__, name); - buffer_put_cstring(c, name); - buffer_put_string(c, NULL, 0); -} - -static void -add_string_option(Buffer *c, const char *name, const char *value) -{ - Buffer b; - - debug3("%s: %s=%s", __func__, name, value); - buffer_init(&b); - buffer_put_cstring(&b, value); - - buffer_put_cstring(c, name); - buffer_put_string(c, buffer_ptr(&b), buffer_len(&b)); - - buffer_free(&b); -} - -#define OPTIONS_CRITICAL 1 -#define OPTIONS_EXTENSIONS 2 -static void -prepare_options_buf(Buffer *c, int which) -{ - buffer_clear(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); -} - -static Key * -load_pkcs11_key(char *path) -{ -#ifdef ENABLE_PKCS11 - Key **keys = NULL, *public, *private = NULL; - int i, nkeys; - - if ((public = key_load_public(path, NULL)) == NULL) - fatal("Couldn't load CA public key \"%s\"", path); - - 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 (key_equal_public(public, keys[i])) { - private = keys[i]; - continue; - } - key_free(keys[i]); - } - xfree(keys); - key_free(public); - return private; -#else - fatal("no pkcs11 support"); -#endif /* ENABLE_PKCS11 */ -} - -static void -do_ca_sign(struct passwd *pw, int argc, char **argv) -{ - int i, fd; - u_int n; - Key *ca, *public; - char *otmp, *tmp, *cp, *out, *comment, **plist = NULL; - FILE *f; - int v00 = 0; /* legacy keys */ - - if (key_type_name != NULL) { - switch (key_type_from_name(key_type_name)) { - case KEY_RSA_CERT_V00: - case KEY_DSA_CERT_V00: - v00 = 1; - break; - case KEY_UNSPEC: - if (strcasecmp(key_type_name, "v00") == 0) { - v00 = 1; - break; - } else if (strcasecmp(key_type_name, "v01") == 0) - break; - /* FALLTHROUGH */ - default: - fprintf(stderr, "unknown key type %s\n", key_type_name); - exit(1); - } - } - - pkcs11_init(1); - tmp = tilde_expand_filename(ca_key_path, pw->pw_uid); - if (pkcs11provider != NULL) { - if ((ca = load_pkcs11_key(tmp)) == NULL) - fatal("No PKCS#11 key matching %s found", ca_key_path); - } else if ((ca = load_identity(tmp)) == NULL) - fatal("Couldn't load CA key \"%s\"", tmp); - xfree(tmp); - - 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 = xrealloc(plist, n + 1, sizeof(*plist)); - if (*(plist[n] = xstrdup(cp)) == '\0') - fatal("Empty principal name"); - } - xfree(otmp); - } - - tmp = tilde_expand_filename(argv[i], pw->pw_uid); - if ((public = key_load_public(tmp, &comment)) == NULL) - fatal("%s: unable to open \"%s\"", __func__, tmp); - if (public->type != KEY_RSA && public->type != KEY_DSA && - public->type != KEY_ECDSA) - fatal("%s: key \"%s\" type %s cannot be certified", - __func__, tmp, key_type(public)); - - /* Prepare certificate to sign */ - if (key_to_certified(public, v00) != 0) - fatal("Could not upgrade key %s to certificate", tmp); - 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; - if (v00) { - prepare_options_buf(&public->cert->critical, - OPTIONS_CRITICAL|OPTIONS_EXTENSIONS); - } else { - prepare_options_buf(&public->cert->critical, - OPTIONS_CRITICAL); - prepare_options_buf(&public->cert->extensions, - OPTIONS_EXTENSIONS); - } - public->cert->signature_key = key_from_private(ca); - - if (key_certify(public, ca) != 0) - fatal("Couldn't not certify key %s", tmp); - - if ((cp = strrchr(tmp, '.')) != NULL && strcmp(cp, ".pub") == 0) - *cp = '\0'; - xasprintf(&out, "%s-cert.pub", tmp); - xfree(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 (!key_write(public, f)) - fatal("Could not write certified key to %s", out); - fprintf(f, " %s\n", comment); - fclose(f); - - if (!quiet) { - logit("Signed %s key %s: id \"%s\" serial %llu%s%s " - "valid %s", key_cert_type(public), - out, public->cert->key_id, - (unsigned long long)public->cert->serial, - cert_principals != NULL ? " for " : "", - cert_principals != NULL ? cert_principals : "", - fmt_validity(cert_valid_from, cert_valid_to)); - } - - key_free(public); - xfree(out); - } - pkcs11_terminate(); - 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 u_int64_t -parse_absolute_time(const char *s) -{ - struct tm tm; - time_t tt; - char buf[32], *fmt; - - /* - * POSIX strptime says "The application shall ensure that there - * is white-space or other non-alphanumeric characters between - * any two conversion specifications" so arrange things this way. - */ - switch (strlen(s)) { - case 8: - fmt = "%Y-%m-%d"; - snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2s", s, s + 4, s + 6); - break; - case 14: - fmt = "%Y-%m-%dT%H:%M:%S"; - snprintf(buf, sizeof(buf), "%.4s-%.2s-%.2sT%.2s:%.2s:%.2s", - s, s + 4, s + 6, s + 8, s + 10, s + 12); - break; - default: - fatal("Invalid certificate time format %s", s); - } - - bzero(&tm, sizeof(tm)); - if (strptime(buf, fmt, &tm) == NULL) - fatal("Invalid certificate time %s", s); - if ((tt = mktime(&tm)) < 0) - fatal("Certificate time %s cannot be represented", s); - return (u_int64_t)tt; -} - -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 - * to := [+-]timespec | YYYYMMDD | YYYYMMDDHHMMSS - */ - 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 - cert_valid_from = parse_absolute_time(from); - - if (*to == '-' || *to == '+') - cert_valid_to = parse_relative_time(to, cert_valid_from); - else - cert_valid_to = parse_absolute_time(to); - - if (cert_valid_to <= cert_valid_from) - fatal("Empty certificate validity interval"); - xfree(from); -} - -static void -add_cert_option(char *opt) -{ - char *val; - - 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 - fatal("Unsupported certificate option \"%s\"", opt); -} - -static void -show_options(const Buffer *optbuf, int v00, int in_critical) -{ - u_char *name, *data; - u_int dlen; - Buffer options, option; - - buffer_init(&options); - buffer_append(&options, buffer_ptr(optbuf), buffer_len(optbuf)); - - buffer_init(&option); - while (buffer_len(&options) != 0) { - name = buffer_get_string(&options, NULL); - data = buffer_get_string_ptr(&options, &dlen); - buffer_append(&option, data, dlen); - printf(" %s", name); - if ((v00 || !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 ((v00 || in_critical) && - (strcmp(name, "force-command") == 0 || - strcmp(name, "source-address") == 0)) { - data = buffer_get_string(&option, NULL); - printf(" %s\n", data); - xfree(data); - } else { - printf(" UNKNOWN OPTION (len %u)\n", - buffer_len(&option)); - buffer_clear(&option); - } - xfree(name); - if (buffer_len(&option) != 0) - fatal("Option corrupt: extra data at end"); - } - buffer_free(&option); - buffer_free(&options); -} - -static void -do_show_cert(struct passwd *pw) -{ - Key *key; - struct stat st; - char *key_fp, *ca_fp; - u_int i, v00; - - if (!have_identity) - ask_filename(pw, "Enter file in which the key is"); - if (stat(identity_file, &st) < 0) - fatal("%s: %s: %s", __progname, identity_file, strerror(errno)); - if ((key = key_load_public(identity_file, NULL)) == NULL) - fatal("%s is not a public key", identity_file); - if (!key_is_cert(key)) - fatal("%s is not a certificate", identity_file); - v00 = key->type == KEY_RSA_CERT_V00 || key->type == KEY_DSA_CERT_V00; - - key_fp = key_fingerprint(key, SSH_FP_MD5, SSH_FP_HEX); - ca_fp = key_fingerprint(key->cert->signature_key, - SSH_FP_MD5, SSH_FP_HEX); - - printf("%s:\n", identity_file); - printf(" Type: %s %s certificate\n", key_ssh_name(key), - key_cert_type(key)); - printf(" Public key: %s %s\n", key_type(key), key_fp); - printf(" Signing CA: %s %s\n", - key_type(key->cert->signature_key), ca_fp); - printf(" Key ID: \"%s\"\n", key->cert->key_id); - if (!v00) { - printf(" Serial: %llu\n", - (unsigned long long)key->cert->serial); - } - printf(" Valid: %s\n", - fmt_validity(key->cert->valid_after, key->cert->valid_before)); - 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 (buffer_len(&key->cert->critical) == 0) - printf("(none)\n"); - else { - printf("\n"); - show_options(&key->cert->critical, v00, 1); - } - if (!v00) { - printf(" Extensions: "); - if (buffer_len(&key->cert->extensions) == 0) - printf("(none)\n"); - else { - printf("\n"); - show_options(&key->cert->extensions, v00, 0); - } - } - exit(0); -} - -static void -usage(void) -{ - fprintf(stderr, "usage: %s [options]\n", __progname); - fprintf(stderr, "Options:\n"); - fprintf(stderr, " -A Generate non-existent host keys for all key types.\n"); - fprintf(stderr, " -a trials Number of trials for screening DH-GEX moduli.\n"); - fprintf(stderr, " -B Show bubblebabble digest of key file.\n"); - fprintf(stderr, " -b bits Number of bits in the key to create.\n"); - fprintf(stderr, " -C comment Provide new comment.\n"); - fprintf(stderr, " -c Change comment in private and public key files.\n"); -#ifdef ENABLE_PKCS11 - fprintf(stderr, " -D pkcs11 Download public key from pkcs11 token.\n"); -#endif - fprintf(stderr, " -e Export OpenSSH to foreign format key file.\n"); - fprintf(stderr, " -F hostname Find hostname in known hosts file.\n"); - fprintf(stderr, " -f filename Filename of the key file.\n"); - fprintf(stderr, " -G file Generate candidates for DH-GEX moduli.\n"); - fprintf(stderr, " -g Use generic DNS resource record format.\n"); - fprintf(stderr, " -H Hash names in known_hosts file.\n"); - fprintf(stderr, " -h Generate host certificate instead of a user certificate.\n"); - fprintf(stderr, " -I key_id Key identifier to include in certificate.\n"); - fprintf(stderr, " -i Import foreign format to OpenSSH key file.\n"); - fprintf(stderr, " -L Print the contents of a certificate.\n"); - fprintf(stderr, " -l Show fingerprint of key file.\n"); - fprintf(stderr, " -M memory Amount of memory (MB) to use for generating DH-GEX moduli.\n"); - fprintf(stderr, " -m key_fmt Conversion format for -e/-i (PEM|PKCS8|RFC4716).\n"); - fprintf(stderr, " -N phrase Provide new passphrase.\n"); - fprintf(stderr, " -n name,... User/host principal names to include in certificate\n"); - fprintf(stderr, " -O option Specify a certificate option.\n"); - fprintf(stderr, " -P phrase Provide old passphrase.\n"); - fprintf(stderr, " -p Change passphrase of private key file.\n"); - fprintf(stderr, " -q Quiet.\n"); - fprintf(stderr, " -R hostname Remove host from known_hosts file.\n"); - fprintf(stderr, " -r hostname Print DNS resource record.\n"); - fprintf(stderr, " -S start Start point (hex) for generating DH-GEX moduli.\n"); - fprintf(stderr, " -s ca_key Certify keys with CA key.\n"); - fprintf(stderr, " -T file Screen candidates for DH-GEX moduli.\n"); - fprintf(stderr, " -t type Specify type of key to create.\n"); - fprintf(stderr, " -V from:to Specify certificate validity interval.\n"); - fprintf(stderr, " -v Verbose.\n"); - fprintf(stderr, " -W gen Generator to use for generating DH-GEX moduli.\n"); - fprintf(stderr, " -y Read private key file and print public key.\n"); - fprintf(stderr, " -z serial Specify a serial number.\n"); - - exit(1); -} - -/* - * Main program for key management. - */ -int -main(int argc, char **argv) -{ - char dotsshdir[MAXPATHLEN], comment[1024], *passphrase1, *passphrase2; - char out_file[MAXPATHLEN], *rr_hostname = NULL; - Key *private, *public; - struct passwd *pw; - struct stat st; - int opt, type, fd; - u_int32_t memory = 0, generator_wanted = 0, trials = 100; - int do_gen_candidates = 0, do_screen_candidates = 0; - int gen_all_hostkeys = 0; - BIGNUM *start = NULL; - FILE *f; - const char *errstr; - - 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]); - - OpenSSL_add_all_algorithms(); - log_init(argv[0], SYSLOG_LEVEL_INFO, SYSLOG_FACILITY_USER, 1); - - seed_rng(); - - /* we need this for the home * directory. */ - pw = getpwuid(getuid()); - if (!pw) { - printf("You don't exist, go away!\n"); - exit(1); - } - if (gethostname(hostname, sizeof(hostname)) < 0) { - perror("gethostname"); - exit(1); - } - - while ((opt = getopt(argc, argv, "AegiqpclBHLhvxXyF:b:f:t:D:I:P:m:N:n:" - "O:C:r:g:R:T:G:M:S:s:a:V:W:z:")) != -1) { - switch (opt) { - case 'A': - gen_all_hostkeys = 1; - break; - case 'b': - bits = (u_int32_t)strtonum(optarg, 256, 32768, &errstr); - if (errstr) - fatal("Bits has bad value %s (%s)", - optarg, errstr); - 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; - break; - } - if (strcasecmp(optarg, "PEM") == 0) { - convert_format = FMT_PEM; - break; - } - fatal("Unsupported conversion format \"%s\"", optarg); - case 'n': - cert_principals = optarg; - 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 'O': - add_cert_option(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 '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 '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 'W': - generator_wanted = (u_int32_t)strtonum(optarg, 1, - UINT_MAX, &errstr); - if (errstr) - fatal("Desired generator has bad value: %s (%s)", - optarg, errstr); - break; - case 'a': - trials = (u_int32_t)strtonum(optarg, 1, UINT_MAX, &errstr); - if (errstr) - fatal("Invalid number of trials: %s (%s)", - optarg, errstr); - 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 'G': - do_gen_candidates = 1; - if (strlcpy(out_file, optarg, sizeof(out_file)) >= - sizeof(out_file)) - fatal("Output filename too long"); - 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 'S': - /* XXX - also compare length against bits */ - if (BN_hex2bn(&start, optarg) == 0) - fatal("Invalid start point."); - break; - case 'V': - parse_cert_times(optarg); - break; - case 'z': - cert_serial = strtonum(optarg, 0, LLONG_MAX, &errstr); - if (errstr) - fatal("Invalid serial number: %s", errstr); - break; - case '?': - default: - usage(); - } - } - - /* reinit */ - log_init(argv[0], log_level, SYSLOG_FACILITY_USER, 1); - - argv += optind; - argc -= optind; - - if (ca_key_path != NULL) { - if (argc < 1) { - printf("Too few arguments.\n"); - usage(); - } - } else if (argc > 0) { - printf("Too many arguments.\n"); - usage(); - } - if (change_passphrase && change_comment) { - printf("Can only have one of -p and -c.\n"); - usage(); - } - if (print_fingerprint && (delete_host || hash_hosts)) { - printf("Cannot use -l with -D or -R.\n"); - usage(); - } - if (ca_key_path != NULL) { - if (cert_key_id == NULL) - fatal("Must specify key id (-I) when certifying"); - do_ca_sign(pw, argc, argv); - } - if (show_cert) - do_show_cert(pw); - if (delete_host || hash_hosts || find_host) - do_known_hosts(pw, rr_hostname); - if (print_fingerprint || print_bubblebabble) - do_fingerprint(pw); - if (change_passphrase) - do_change_passphrase(pw); - if (change_comment) - do_change_comment(pw); - if (convert_to) - do_convert_to(pw); - if (convert_from) - do_convert_from(pw); - 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); - if (n == 0) { - perror(identity_file); - exit(1); - } - exit(0); - } else { - - n += do_print_resource_record(pw, - _PATH_HOST_RSA_KEY_FILE, rr_hostname); - n += do_print_resource_record(pw, - _PATH_HOST_DSA_KEY_FILE, rr_hostname); - - if (n == 0) - fatal("no keys found."); - exit(0); - } - } - if (pkcs11provider != NULL) - do_download(pw); - - 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, "w"); - - 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, trials, generator_wanted) != 0) - fatal("modulus screening failed"); - return (0); - } - - if (gen_all_hostkeys) { - do_gen_all_hostkeys(pw); - return (0); - } - - arc4random_stir(); - - if (key_type_name == NULL) - key_type_name = "rsa"; - - type = key_type_from_name(key_type_name); - type_bits_valid(type, &bits); - - if (!quiet) - printf("Generating public/private %s key pair.\n", key_type_name); - private = key_generate(type, bits); - if (private == NULL) { - fprintf(stderr, "key_generate failed\n"); - exit(1); - } - public = key_from_private(private); - - 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) < 0) { - if (errno != ENOENT) { - error("Could not stat %s: %s", dotsshdir, - strerror(errno)); - } else if (mkdir(dotsshdir, 0700) < 0) { - 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 (stat(identity_file, &st) >= 0) { - char yesno[3]; - printf("%s already exists.\n", identity_file); - printf("Overwrite (y/n)? "); - fflush(stdout); - if (fgets(yesno, sizeof(yesno), stdin) == NULL) - exit(1); - if (yesno[0] != 'y' && yesno[0] != 'Y') - 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. - */ - memset(passphrase1, 0, strlen(passphrase1)); - memset(passphrase2, 0, strlen(passphrase2)); - xfree(passphrase1); - xfree(passphrase2); - printf("Passphrases do not match. Try again.\n"); - goto passphrase_again; - } - /* Clear the other copy of the passphrase. */ - memset(passphrase2, 0, strlen(passphrase2)); - xfree(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 (!key_save_private(private, identity_file, passphrase1, comment)) { - printf("Saving the key failed: %s.\n", identity_file); - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - exit(1); - } - /* Clear the passphrase. */ - memset(passphrase1, 0, strlen(passphrase1)); - xfree(passphrase1); - - /* Clear the private key and the random number generator. */ - key_free(private); - arc4random_stir(); - - if (!quiet) - printf("Your identification has been saved in %s.\n", identity_file); - - strlcat(identity_file, ".pub", sizeof(identity_file)); - fd = open(identity_file, O_WRONLY | O_CREAT | O_TRUNC, 0644); - if (fd == -1) { - printf("Could not save your public key in %s\n", identity_file); - exit(1); - } - f = fdopen(fd, "w"); - if (f == NULL) { - printf("fdopen %s failed\n", identity_file); - exit(1); - } - if (!key_write(public, f)) - fprintf(stderr, "write key failed\n"); - fprintf(f, " %s\n", comment); - fclose(f); - - if (!quiet) { - char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX); - char *ra = key_fingerprint(public, SSH_FP_MD5, - SSH_FP_RANDOMART); - 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); - xfree(ra); - xfree(fp); - } - - key_free(public); - exit(0); -} |