Put ssh back into the repository
Change-Id: I23324372188fa6ed3f93a32b84365f5df6367590
diff --git a/ssh-keygen.c b/ssh-keygen.c
new file mode 100644
index 0000000..4b6218b
--- /dev/null
+++ b/ssh-keygen.c
@@ -0,0 +1,2370 @@
+/* $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);
+}