]> andersk Git - openssh.git/blobdiff - ssh-keygen.c
- OpenBSD CVS Sync
[openssh.git] / ssh-keygen.c
index 83d05d9a35631e3dde71c7f7ace38c6180a57b8c..b9ea0178173268192d54a0e1bb8c92b34167c755 100644 (file)
@@ -2,25 +2,32 @@
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
- * Created: Mon Mar 27 02:26:40 1995 ylo
  * 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"
-RCSID("$Id$");
+RCSID("$OpenBSD: ssh-keygen.c,v 1.50 2001/03/12 22:02:02 markus Exp $");
 
-#include "rsa.h"
-#include "ssh.h"
-#include "xmalloc.h"
-#include "fingerprint.h"
-
-/* Generated private key. */
-RSA *private_key;
-
-/* Generated public key. */
-RSA *public_key;
+#include <openssl/evp.h>
+#include <openssl/pem.h>
 
-/* Number of bits in the RSA key.  This value can be changed on the command line. */
+#include "xmalloc.h"
+#include "key.h"
+#include "authfile.h"
+#include "uuencode.h"
+#include "buffer.h"
+#include "bufaux.h"
+#include "pathnames.h"
+#include "log.h"
+#include "readpass.h"
+
+/* Number of bits in the RSA/DSA key.  This value can be changed on the command line. */
 int bits = 1024;
 
 /*
@@ -39,6 +46,7 @@ int quiet = 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];
@@ -53,21 +61,47 @@ char *identity_new_passphrase = NULL;
 /* This is set to the new comment if given on the command line. */
 char *identity_comment = NULL;
 
+/* Dump public key file in format used by real and the original SSH 2 */
+int convert_to_ssh2 = 0;
+int convert_from_ssh2 = 0;
+int print_public = 0;
+
+/* default to RSA for SSH-1 */
+char *key_type_name = "rsa1";
+
 /* argv0 */
 #ifdef HAVE___PROGNAME
 extern char *__progname;
-#else /* HAVE___PROGNAME */
-const char *__progname = "ssh-keygen";
-#endif /* HAVE___PROGNAME */
+#else
+char *__progname;
+#endif
+
+char hostname[MAXHOSTNAMELEN];
 
 void
 ask_filename(struct passwd *pw, const char *prompt)
 {
        char buf[1024];
-       snprintf(identity_file, sizeof(identity_file), "%s/%s",
-                pw->pw_dir, SSH_CLIENT_IDENTITY);
-       printf("%s (%s): ", prompt, identity_file);
-       fflush(stdout);
+       char *name = NULL;
+
+       switch (key_type_from_name(key_type_name)) {
+       case KEY_RSA1:
+               name = _PATH_SSH_CLIENT_IDENTITY;
+               break;
+       case KEY_DSA:
+               name = _PATH_SSH_CLIENT_ID_DSA;
+               break;
+       case KEY_RSA:
+               name = _PATH_SSH_CLIENT_ID_RSA;
+               break;
+       default:
+               fprintf(stderr, "bad key type");
+               exit(1);
+               break;
+       }
+       snprintf(identity_file, sizeof(identity_file), "%s/%s", pw->pw_dir, name);
+       fprintf(stderr, "%s (%s): ", prompt, identity_file);
+       fflush(stderr);
        if (fgets(buf, sizeof(buf), stdin) == NULL)
                exit(1);
        if (strchr(buf, '\n'))
@@ -77,38 +111,259 @@ ask_filename(struct passwd *pw, const char *prompt)
        have_identity = 1;
 }
 
+int
+try_load_key(char *filename, Key *k)
+{
+       int success = 1;
+       if (!load_private_key(filename, "", k, NULL)) {
+               char *pass = read_passphrase("Enter passphrase: ", 1);
+               if (!load_private_key(filename, pass, k, NULL)) {
+                       success = 0;
+               }
+               memset(pass, 0, strlen(pass));
+               xfree(pass);
+       }
+       return success;
+}
+
+#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
+
+void
+do_convert_to_ssh2(struct passwd *pw)
+{
+       Key *k;
+       int len;
+       u_char *blob;
+       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);
+       }
+       k = key_new(KEY_UNSPEC);
+       if (!try_load_key(identity_file, k)) {
+               fprintf(stderr, "load failed\n");
+               exit(1);
+       }
+       key_to_blob(k, &blob, &len);
+       fprintf(stdout, "%s\n", SSH_COM_PUBLIC_BEGIN);
+       fprintf(stdout,
+           "Comment: \"%d-bit %s, converted from OpenSSH by %s@%s\"\n",
+           key_size(k), key_type(k),
+           pw->pw_name, hostname);
+       dump_base64(stdout, blob, len);
+       fprintf(stdout, "%s\n", SSH_COM_PUBLIC_END);
+       key_free(k);
+       xfree(blob);
+       exit(0);
+}
+
+void
+buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
+{
+       int bits = buffer_get_int(b);
+       int bytes = (bits + 7) / 8;
+       if (buffer_len(b) < bytes)
+               fatal("buffer_get_bignum_bits: input buffer too small");
+       BN_bin2bn((u_char *)buffer_ptr(b), bytes, value);
+       buffer_consume(b, bytes);
+}
+
+Key *
+do_convert_private_ssh2_from_blob(char *blob, int blen)
+{
+       Buffer b;
+       DSA *dsa;
+       Key *key = NULL;
+       int ignore, magic, rlen;
+       char *type, *cipher;
+
+       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;
+       }
+       ignore = buffer_get_int(&b);
+       type   = buffer_get_string(&b, NULL);
+       cipher = buffer_get_string(&b, NULL);
+       ignore = buffer_get_int(&b);
+       ignore = buffer_get_int(&b);
+       ignore = buffer_get_int(&b);
+       xfree(type);
+
+       if (strcmp(cipher, "none") != 0) {
+               error("unsupported cipher %s", cipher);
+               xfree(cipher);
+               buffer_free(&b);
+               return NULL;
+       }
+       xfree(cipher);
+
+       key = key_new(KEY_DSA);
+       dsa = key->dsa;
+       dsa->priv_key = BN_new();
+       if (dsa->priv_key == NULL) {
+               error("alloc priv_key failed");
+               key_free(key);
+               return NULL;
+       }
+       buffer_get_bignum_bits(&b, dsa->p);
+       buffer_get_bignum_bits(&b, dsa->g);
+       buffer_get_bignum_bits(&b, dsa->q);
+       buffer_get_bignum_bits(&b, dsa->pub_key);
+       buffer_get_bignum_bits(&b, dsa->priv_key);
+       rlen = buffer_len(&b);
+       if(rlen != 0)
+               error("do_convert_private_ssh2_from_blob: remaining bytes in key blob %d", rlen);
+       buffer_free(&b);
+       return key;
+}
+
+void
+do_convert_from_ssh2(struct passwd *pw)
+{
+       Key *k;
+       int blen;
+       char line[1024], *p;
+       char blob[8096];
+       char encoded[8096];
+       struct stat st;
+       int escaped = 0, private = 0, ok;
+       FILE *fp;
+
+       if (!have_identity)
+               ask_filename(pw, "Enter file in which the key is");
+       if (stat(identity_file, &st) < 0) {
+               perror(identity_file);
+               exit(1);
+       }
+       fp = fopen(identity_file, "r");
+       if (fp == NULL) {
+               perror(identity_file);
+               exit(1);
+       }
+       encoded[0] = '\0';
+       while (fgets(line, sizeof(line), fp)) {
+               if (!(p = strchr(line, '\n'))) {
+                       fprintf(stderr, "input line too long.\n");
+                       exit(1);
+               }
+               if (p > line && p[-1] == '\\')
+                       escaped++;
+               if (strncmp(line, "----", 4) == 0 ||
+                   strstr(line, ": ") != NULL) {
+                       if (strstr(line, SSH_COM_PRIVATE_BEGIN) != NULL)
+                               private = 1;
+                       fprintf(stderr, "ignore: %s", line);
+                       continue;
+               }
+               if (escaped) {
+                       escaped--;
+                       fprintf(stderr, "escaped: %s", line);
+                       continue;
+               }
+               *p = '\0';
+               strlcat(encoded, line, sizeof(encoded));
+       }
+       blen = uudecode(encoded, (u_char *)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);
+       }
+       ok = private ?
+           PEM_write_DSAPrivateKey(stdout, k->dsa, NULL, NULL, 0, NULL, NULL) :
+           key_write(k, stdout);
+       if (!ok) {
+               fprintf(stderr, "key write failed");
+               exit(1);
+       }
+       key_free(k);
+       fprintf(stdout, "\n");
+       fclose(fp);
+       exit(0);
+}
+
+void
+do_print_public(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) {
+               perror(identity_file);
+               exit(1);
+       }
+       k = key_new(KEY_UNSPEC);
+       if (!try_load_key(identity_file, k)) {
+               fprintf(stderr, "load failed\n");
+               exit(1);
+       }
+       if (!key_write(k, stdout))
+               fprintf(stderr, "key_write failed");
+       key_free(k);
+       fprintf(stdout, "\n");
+       exit(0);
+}
+
 void
 do_fingerprint(struct passwd *pw)
 {
        FILE *f;
-       BIGNUM *e, *n;
-       RSA *public_key;
-       char *comment = NULL, *cp, *ep, line[16*1024];
-       int i, skip = 0, num = 1, invalid = 1;
-       unsigned int ignore;
+       Key *public;
+       char *comment = NULL, *cp, *ep, line[16*1024], *fp;
+       int i, skip = 0, num = 1, invalid = 1, success = 0, rep, type;
        struct stat st;
 
+       type = 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 = RSA_new();
-       if (load_public_key(identity_file, public_key, &comment)) {
-               printf("%d %s %s\n", BN_num_bits(public_key->n),
-                   fingerprint(public_key->e, public_key->n),
-                   comment);
-               RSA_free(public_key);
+       public = key_new(KEY_RSA1);
+       if (load_public_key(identity_file, public, &comment)) {
+               success = 1;
+       } else {
+               key_free(public);
+               public = key_new(KEY_UNSPEC);
+               if (try_load_public_key(identity_file, public, &comment))
+                       success = 1;
+               else
+                       debug("try_load_public_key KEY_UNSPEC failed");
+       }
+       if (success) {
+               fp = key_fingerprint(public, type, rep);
+               printf("%d %s %s\n", key_size(public),
+                   fp, comment);
+               key_free(public);
+               xfree(comment);
+               xfree(fp);
                exit(0);
        }
-       RSA_free(public_key);
 
        f = fopen(identity_file, "r");
        if (f != NULL) {
-               n = BN_new();
-               e = BN_new();
                while (fgets(line, sizeof(line), f)) {
                        i = strlen(line) - 1;
                        if (line[i] != '\n') {
@@ -143,18 +398,26 @@ do_fingerprint(struct passwd *pw)
                                *cp++ = '\0';
                        }
                        ep = cp;
-                       if (auth_rsa_read_key(&cp, &ignore, e, n)) {
-                               invalid = 0;
-                               comment = *cp ? cp : comment;
-                               printf("%d %s %s\n", BN_num_bits(n),
-                                   fingerprint(e, n),
-                                   comment ? comment : "no comment");
+                       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, type, rep);
+                       printf("%d %s %s\n", key_size(public), fp,
+                           comment ? comment : "no comment");
+                       xfree(fp);
+                       invalid = 0;
                }
-               BN_free(e);
-               BN_free(n);
                fclose(f);
        }
+       key_free(public);
        if (invalid) {
                printf("%s is not a valid key file.\n", identity_file);
                exit(1);
@@ -172,7 +435,9 @@ do_change_passphrase(struct passwd *pw)
        char *comment;
        char *old_passphrase, *passphrase1, *passphrase2;
        struct stat st;
-       RSA *private_key;
+       Key *private;
+       Key *public;
+       int type = KEY_RSA1;
 
        if (!have_identity)
                ask_filename(pw, "Enter file in which the key is");
@@ -180,22 +445,21 @@ do_change_passphrase(struct passwd *pw)
                perror(identity_file);
                exit(1);
        }
-       public_key = RSA_new();
-       if (!load_public_key(identity_file, public_key, NULL)) {
-               printf("%s is not a valid key file.\n", identity_file);
-               exit(1);
+       public = key_new(type);
+       if (!load_public_key(identity_file, public, NULL)) {
+               type = KEY_UNSPEC;
+       } else {
+               /* Clear the public key since we are just about to load the whole file. */
+               key_free(public);
        }
-       /* Clear the public key since we are just about to load the whole file. */
-       RSA_free(public_key);
-
        /* Try to load the file with empty passphrase. */
-       private_key = RSA_new();
-       if (!load_private_key(identity_file, "", private_key, &comment)) {
+       private = key_new(type);
+       if (!load_private_key(identity_file, "", private, &comment)) {
                if (identity_passphrase)
                        old_passphrase = xstrdup(identity_passphrase);
                else
                        old_passphrase = read_passphrase("Enter old passphrase: ", 1);
-               if (!load_private_key(identity_file, old_passphrase, private_key, &comment)) {
+               if (!load_private_key(identity_file, old_passphrase, private, &comment)) {
                        memset(old_passphrase, 0, strlen(old_passphrase));
                        xfree(old_passphrase);
                        printf("Bad passphrase.\n");
@@ -230,19 +494,19 @@ do_change_passphrase(struct passwd *pw)
        }
 
        /* Save the file using the new passphrase. */
-       if (!save_private_key(identity_file, passphrase1, private_key, comment)) {
+       if (!save_private_key(identity_file, passphrase1, private, comment)) {
                printf("Saving the key failed: %s: %s.\n",
                       identity_file, strerror(errno));
                memset(passphrase1, 0, strlen(passphrase1));
                xfree(passphrase1);
-               RSA_free(private_key);
+               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);
-       RSA_free(private_key);  /* Destroys contents */
+       key_free(private);               /* Destroys contents */
        xfree(comment);
 
        printf("Your identification has been saved with the new passphrase.\n");
@@ -255,12 +519,11 @@ do_change_passphrase(struct passwd *pw)
 void
 do_change_comment(struct passwd *pw)
 {
-       char new_comment[1024], *comment;
-       RSA *private_key;
-       char *passphrase;
+       char new_comment[1024], *comment, *passphrase;
+       Key *private, *public;
        struct stat st;
        FILE *f;
-       char *tmpbuf;
+       int fd;
 
        if (!have_identity)
                ask_filename(pw, "Enter file in which the key is");
@@ -272,14 +535,15 @@ do_change_comment(struct passwd *pw)
         * Try to load the public key from the file the verify that it is
         * readable and of the proper format.
         */
-       public_key = RSA_new();
-       if (!load_public_key(identity_file, public_key, NULL)) {
+       public = key_new(KEY_RSA1);
+       if (!load_public_key(identity_file, public, NULL)) {
                printf("%s is not a valid key file.\n", identity_file);
+               printf("Comments are only supported in RSA1 keys\n");
                exit(1);
        }
-       private_key = RSA_new();
 
-       if (load_private_key(identity_file, "", private_key, &comment))
+       private = key_new(KEY_RSA1);
+       if (load_private_key(identity_file, "", private, &comment))
                passphrase = xstrdup("");
        else {
                if (identity_passphrase)
@@ -289,7 +553,7 @@ do_change_comment(struct passwd *pw)
                else
                        passphrase = read_passphrase("Enter passphrase: ", 1);
                /* Try to load using the passphrase. */
-               if (!load_private_key(identity_file, passphrase, private_key, &comment)) {
+               if (!load_private_key(identity_file, passphrase, private, &comment)) {
                        memset(passphrase, 0, strlen(passphrase));
                        xfree(passphrase);
                        printf("Bad passphrase.\n");
@@ -305,7 +569,7 @@ do_change_comment(struct passwd *pw)
                fflush(stdout);
                if (!fgets(new_comment, sizeof(new_comment), stdin)) {
                        memset(passphrase, 0, strlen(passphrase));
-                       RSA_free(private_key);
+                       key_free(private);
                        exit(1);
                }
                if (strchr(new_comment, '\n'))
@@ -313,32 +577,34 @@ do_change_comment(struct passwd *pw)
        }
 
        /* Save the file using the new passphrase. */
-       if (!save_private_key(identity_file, passphrase, private_key, new_comment)) {
+       if (!save_private_key(identity_file, passphrase, private, new_comment)) {
                printf("Saving the key failed: %s: %s.\n",
                       identity_file, strerror(errno));
                memset(passphrase, 0, strlen(passphrase));
                xfree(passphrase);
-               RSA_free(private_key);
+               key_free(private);
                xfree(comment);
                exit(1);
        }
        memset(passphrase, 0, strlen(passphrase));
        xfree(passphrase);
-       RSA_free(private_key);
+       key_free(private);
 
        strlcat(identity_file, ".pub", sizeof(identity_file));
-       f = fopen(identity_file, "w");
-       if (!f) {
+       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);
        }
-       fprintf(f, "%d ", BN_num_bits(public_key->n));
-       tmpbuf = BN_bn2dec(public_key->e);
-       fprintf(f, "%s ", tmpbuf);
-       free(tmpbuf);
-       tmpbuf = BN_bn2dec(public_key->n);
-       fprintf(f, "%s %s\n", tmpbuf, new_comment);
-       free(tmpbuf);
+       f = fdopen(fd, "w");
+       if (f == NULL) {
+               printf("fdopen %s failed", identity_file);
+               exit(1);
+       }
+       if (!key_write(public, f))
+               fprintf(stderr, "write key failed");
+       key_free(public);
+       fprintf(f, " %s\n", new_comment);
        fclose(f);
 
        xfree(comment);
@@ -350,8 +616,8 @@ do_change_comment(struct passwd *pw)
 void
 usage(void)
 {
-       printf("ssh-keygen version %s\n", SSH_VERSION);
-       printf("Usage: %s [-b bits] [-p] [-c] [-l] [-f file] [-P pass] [-N new-pass] [-C comment]\n", __progname);
+       printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] "
+           "[-N new-pass] [-P pass]\n", __progname);
        exit(1);
 }
 
@@ -362,30 +628,32 @@ int
 main(int ac, char **av)
 {
        char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2;
+       Key *private, *public;
        struct passwd *pw;
-       char *tmpbuf;
-       int opt;
+       int opt, type, fd;
        struct stat st;
        FILE *f;
-       char hostname[MAXHOSTNAMELEN];
+
        extern int optind;
        extern char *optarg;
 
-       /* check if RSA support exists */
-       if (rsa_alive() == 0) {
-               fprintf(stderr,
-                       "%s: no RSA support in libssl and libcrypto.  See ssl(8).\n",
-                       __progname);
-               exit(1);
-       }
+       __progname = get_progname(av[0]);
+       init_rng();
+
+       SSLeay_add_all_algorithms();
+
        /* 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(ac, av, "qpclb:f:P:N:C:")) != EOF) {
+       while ((opt = getopt(ac, av, "dqpclBRxXyb:f:t:P:N:C:")) != -1) {
                switch (opt) {
                case 'b':
                        bits = atoi(optarg);
@@ -399,6 +667,10 @@ main(int ac, char **av)
                        print_fingerprint = 1;
                        break;
 
+               case 'B':
+                       print_bubblebabble = 1;
+                       break;
+
                case 'p':
                        change_passphrase = 1;
                        break;
@@ -428,6 +700,31 @@ main(int ac, char **av)
                        quiet = 1;
                        break;
 
+               case 'R':
+                       /* unused */
+                       exit(0);
+                       break;
+
+               case 'x':
+                       convert_to_ssh2 = 1;
+                       break;
+
+               case 'X':
+                       convert_from_ssh2 = 1;
+                       break;
+
+               case 'y':
+                       print_public = 1;
+                       break;
+
+               case 'd':
+                       key_type_name = "dsa";
+                       break;
+
+               case 't':
+                       key_type_name = optarg;
+                       break;
+
                case '?':
                default:
                        usage();
@@ -441,31 +738,43 @@ main(int ac, char **av)
                printf("Can only have one of -p and -c.\n");
                usage();
        }
-       if (print_fingerprint)
+       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_ssh2)
+               do_convert_to_ssh2(pw);
+       if (convert_from_ssh2)
+               do_convert_from_ssh2(pw);
+       if (print_public)
+               do_print_public(pw);
 
        arc4random_stir();
 
-       if (quiet)
-               rsa_set_verbose(0);
-
-       /* Generate the rsa key pair. */
-       private_key = RSA_new();
-       public_key = RSA_new();
-       rsa_generate_key(private_key, public_key, bits);
+       type = key_type_from_name(key_type_name);
+       if (type == KEY_UNSPEC) {
+               fprintf(stderr, "unknown key type %s\n", key_type_name);
+               exit(1);
+       }
+       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");
+               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, SSH_USER_DIR);
+       snprintf(dotsshdir, sizeof dotsshdir, "%s/%s", pw->pw_dir, _PATH_SSH_USER_DIR);
        if (strstr(identity_file, dotsshdir) != NULL &&
            stat(dotsshdir, &st) < 0) {
-               if (mkdir(dotsshdir, 0755) < 0)
+               if (mkdir(dotsshdir, 0700) < 0)
                        error("Could not create directory '%s'.", dotsshdir);
                else if (!quiet)
                        printf("Created directory '%s'.\n", dotsshdir);
@@ -508,18 +817,14 @@ passphrase_again:
        if (identity_comment) {
                strlcpy(comment, identity_comment, sizeof(comment));
        } else {
-               /* Create default commend field for the passphrase. */
-               if (gethostname(hostname, sizeof(hostname)) < 0) {
-                       perror("gethostname");
-                       exit(1);
-               }
+               /* Create default commend field for the passphrase. */
                snprintf(comment, sizeof comment, "%s@%s", pw->pw_name, hostname);
        }
 
        /* Save the key with the given passphrase and comment. */
-       if (!save_private_key(identity_file, passphrase1, private_key, comment)) {
+       if (!save_private_key(identity_file, passphrase1, private, comment)) {
                printf("Saving the key failed: %s: %s.\n",
-                      identity_file, strerror(errno));
+                   identity_file, strerror(errno));
                memset(passphrase1, 0, strlen(passphrase1));
                xfree(passphrase1);
                exit(1);
@@ -529,33 +834,37 @@ passphrase_again:
        xfree(passphrase1);
 
        /* Clear the private key and the random number generator. */
-       RSA_free(private_key);
+       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));
-       f = fopen(identity_file, "w");
-       if (!f) {
+       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);
        }
-       fprintf(f, "%d ", BN_num_bits(public_key->n));
-       tmpbuf = BN_bn2dec(public_key->e);
-       fprintf(f, "%s ", tmpbuf);
-       free(tmpbuf);
-       tmpbuf = BN_bn2dec(public_key->n);
-       fprintf(f, "%s %s\n", tmpbuf, comment);
-       free(tmpbuf);
+       f = fdopen(fd, "w");
+       if (f == NULL) {
+               printf("fdopen %s failed", identity_file);
+               exit(1);
+       }
+       if (!key_write(public, f))
+               fprintf(stderr, "write key failed");
+       fprintf(f, " %s\n", comment);
        fclose(f);
 
        if (!quiet) {
-               printf("Your public key has been saved in %s.\n", identity_file);
+               char *fp = key_fingerprint(public, SSH_FP_MD5, SSH_FP_HEX);
+               printf("Your public key has been saved in %s.\n",
+                   identity_file);
                printf("The key fingerprint is:\n");
-               printf("%d %s %s\n", BN_num_bits(public_key->n),
-                      fingerprint(public_key->e, public_key->n),
-                      comment);
+               printf("%s %s\n", fp, comment);
+               xfree(fp);
        }
+
+       key_free(public);
        exit(0);
 }
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