/*
-
-ssh-keygen.c
-
-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.
-
-*/
+ * 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"
-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"
+#include <openssl/evp.h>
+#include <openssl/pem.h>
-#ifdef HAVE___PROGNAME
-extern char *__progname;
-#else /* HAVE___PROGNAME */
-const char *__progname = "ssh-keygen";
-#endif /* HAVE___PROGNAME */
-
-/* Generated private key. */
-RSA *private_key;
-
-/* Generated public key. */
-RSA *public_key;
-
-/* 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;
-/* Flag indicating that we just want to change the passphrase. This can be
- set on the command line. */
+/*
+ * 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. */
+/*
+ * 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;
/* Flag indicating that we just want to see the key fingerprint */
int print_fingerprint = 0;
+int print_bubblebabble = 0;
-/* This is set to the identity file name if given on the command line. */
-char *identity_file = NULL;
+/* 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 comment if given on the command line. */
char *identity_comment = NULL;
-/* Perform changing a passphrase. The argument is the passwd structure
- for the current user. */
+/* 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
+char *__progname;
+#endif
+
+char hostname[MAXHOSTNAMELEN];
+
+void
+ask_filename(struct passwd *pw, const char *prompt)
+{
+ char buf[1024];
+ 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'))
+ *strchr(buf, '\n') = 0;
+ if (strcmp(buf, "") != 0)
+ strlcpy(identity_file, buf, sizeof(identity_file));
+ 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
-char *
-get_filename(struct passwd *pw, const char *prompt)
+void
+do_convert_to_ssh2(struct passwd *pw)
{
- char buf[1024], default_file[1024];
-
- /* Read key file name. */
- if (identity_file != NULL) {
- return xstrdup(identity_file);
- } else {
- snprintf(default_file, sizeof default_file, "%s/%s",
- pw->pw_dir, SSH_CLIENT_IDENTITY);
- printf("%s (%s): ", prompt, default_file);
- fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL)
- exit(1);
- if (strchr(buf, '\n'))
- *strchr(buf, '\n') = 0;
- if (strcmp(buf, "") == 0)
- return xstrdup(default_file);
- }
- return xstrdup(buf);
+ 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
-do_fingerprint(struct passwd *pw)
+buffer_get_bignum_bits(Buffer *b, BIGNUM *value)
{
- char *file, *comment;
- RSA *public_key;
- struct stat st;
-
- file = get_filename(pw, "Enter file in which the key is");
- if (stat(file, &st) < 0)
- {
- perror(file);
- exit(1);
- }
- public_key = RSA_new();
- if (!load_public_key(file, public_key, &comment)) {
- char *cp, line[1024];
- BIGNUM *e, *n;
- int dummy, invalid = 0;
- FILE *f = fopen(file, "r");
- n = BN_new();
- e = BN_new();
- if (f && fgets(line, sizeof(line), f)) {
- cp = line;
- line[strlen(line)-1] = '\0';
- if (auth_rsa_read_key(&cp, &dummy, e, n)) {
- public_key->e = e;
- public_key->n = n;
- comment = xstrdup(cp ? cp : "no comment");
- } else {
- invalid = 1;
- }
- } else {
- invalid = 1;
- }
- if (invalid) {
- printf("%s is not a valid key file.\n", file);
- BN_free(e);
- BN_free(n);
- exit(1);
- }
- }
-
- printf("%d %s %s\n", BN_num_bits(public_key->n),
- fingerprint(public_key->e, public_key->n),
- comment);
- RSA_free(public_key);
- exit(0);
+ 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_change_passphrase(struct passwd *pw)
+do_convert_from_ssh2(struct passwd *pw)
{
- char *file, *comment;
- char *old_passphrase, *passphrase1, *passphrase2;
- struct stat st;
- RSA *private_key;
-
- file = get_filename(pw, "Enter file in which the key is");
- /* Check if the file exists. */
- if (stat(file, &st) < 0)
- {
- perror(file);
- exit(1);
- }
-
- /* 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(file, public_key, NULL))
- {
- printf("%s is not a valid key file.\n", file);
- exit(1);
- }
- /* 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(file, "", private_key, &comment)) {
- /* Read passphrase from the user. */
- if (identity_passphrase)
- old_passphrase = xstrdup(identity_passphrase);
- else
- old_passphrase = read_passphrase("Enter old passphrase: ", 1);
- /* Try to load using the passphrase. */
- if (!load_private_key(file, old_passphrase, private_key, &comment))
- {
- memset(old_passphrase, 0, strlen(old_passphrase));
- xfree(old_passphrase);
- printf("Bad passphrase.\n");
- exit(1);
- }
- /* Destroy the passphrase. */
- memset(old_passphrase, 0, strlen(old_passphrase));
- xfree(old_passphrase);
- }
- 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): ", 1);
- passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
-
- /* 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 (!save_private_key(file, passphrase1, private_key, comment))
- {
- printf("Saving the key failed: %s: %s.\n",
- file, strerror(errno));
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
- RSA_free(private_key);
- 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 */
- xfree(comment);
-
- printf("Your identification has been saved with the new passphrase.\n");
- exit(0);
+ 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;
+ 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_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);
+ }
+
+ f = fopen(identity_file, "r");
+ if (f != NULL) {
+ while (fgets(line, sizeof(line), f)) {
+ i = strlen(line) - 1;
+ if (line[i] != '\n') {
+ error("line %d too long: %.40s...", num, line);
+ skip = 1;
+ continue;
+ }
+ num++;
+ if (skip) {
+ skip = 0;
+ continue;
+ }
+ line[i] = '\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, type, rep);
+ printf("%d %s %s\n", key_size(public), fp,
+ comment ? comment : "no comment");
+ xfree(fp);
+ invalid = 0;
+ }
+ fclose(f);
+ }
+ key_free(public);
+ if (invalid) {
+ printf("%s is not a valid key file.\n", identity_file);
+ exit(1);
+ }
+ exit(0);
}
-/* Change the comment of a private key file. */
+/*
+ * Perform changing a passphrase. The argument is the passwd structure
+ * for the current user.
+ */
+void
+do_change_passphrase(struct passwd *pw)
+{
+ char *comment;
+ char *old_passphrase, *passphrase1, *passphrase2;
+ struct stat st;
+ Key *private;
+ Key *public;
+ int type = KEY_RSA1;
+
+ 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_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);
+ }
+ /* Try to load the file with empty passphrase. */
+ 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, &comment)) {
+ memset(old_passphrase, 0, strlen(old_passphrase));
+ xfree(old_passphrase);
+ printf("Bad passphrase.\n");
+ exit(1);
+ }
+ memset(old_passphrase, 0, strlen(old_passphrase));
+ xfree(old_passphrase);
+ }
+ 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): ", 1);
+ passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
+
+ /* 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 (!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);
+ 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);
+}
+/*
+ * Change the comment of a private key file.
+ */
void
do_change_comment(struct passwd *pw)
{
- char new_comment[1024], *file, *comment;
- RSA *private_key;
- char *passphrase;
- struct stat st;
- FILE *f;
- char *tmpbuf;
-
- file = get_filename(pw, "Enter file in which the key is");
- /* Check if the file exists. */
- if (stat(file, &st) < 0)
- {
- perror(file);
- exit(1);
- }
-
- /* 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(file, public_key, NULL))
- {
- printf("%s is not a valid key file.\n", file);
- exit(1);
- }
-
- private_key = RSA_new();
- /* Try to load the file with empty passphrase. */
- if (load_private_key(file, "", private_key, &comment))
- passphrase = xstrdup("");
- else
- {
- /* Read passphrase from the user. */
- if (identity_passphrase)
- passphrase = xstrdup(identity_passphrase);
- else
- if (identity_new_passphrase)
- passphrase = xstrdup(identity_new_passphrase);
- else
- passphrase = read_passphrase("Enter passphrase: ", 1);
- /* Try to load using the passphrase. */
- if (!load_private_key(file, passphrase, private_key, &comment))
- {
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- printf("Bad passphrase.\n");
- 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));
- RSA_free(private_key);
- exit(1);
- }
-
- /* Remove terminating newline from comment. */
- if (strchr(new_comment, '\n'))
- *strchr(new_comment, '\n') = 0;
- }
-
- /* Save the file using the new passphrase. */
- if (!save_private_key(file, passphrase, private_key, new_comment))
- {
- printf("Saving the key failed: %s: %s.\n",
- file, strerror(errno));
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- RSA_free(private_key);
- xfree(comment);
- exit(1);
- }
-
- /* Destroy the passphrase and the private key in memory. */
- memset(passphrase, 0, strlen(passphrase));
- xfree(passphrase);
- RSA_free(private_key);
-
- /* Save the public key in text format in a file with the same name but
- .pub appended. */
- strcat(file, ".pub");
- f = fopen(file, "w");
- if (!f)
- {
- printf("Could not save your public key in %s\n", 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);
- fclose(f);
-
- xfree(comment);
-
- printf("The comment in your key file has been changed.\n");
- exit(0);
+ char new_comment[1024], *comment, *passphrase;
+ Key *private, *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);
+ }
+ /*
+ * Try to load the public key from the file the verify that it is
+ * readable and of the proper format.
+ */
+ 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_new(KEY_RSA1);
+ if (load_private_key(identity_file, "", private, &comment))
+ passphrase = xstrdup("");
+ else {
+ if (identity_passphrase)
+ passphrase = xstrdup(identity_passphrase);
+ else if (identity_new_passphrase)
+ passphrase = xstrdup(identity_new_passphrase);
+ else
+ passphrase = read_passphrase("Enter passphrase: ", 1);
+ /* Try to load using the passphrase. */
+ if (!load_private_key(identity_file, passphrase, private, &comment)) {
+ memset(passphrase, 0, strlen(passphrase));
+ xfree(passphrase);
+ printf("Bad passphrase.\n");
+ 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);
+ }
+ if (strchr(new_comment, '\n'))
+ *strchr(new_comment, '\n') = 0;
+ }
+
+ /* Save the file using the new passphrase. */
+ 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);
+ key_free(private);
+ xfree(comment);
+ exit(1);
+ }
+ memset(passphrase, 0, strlen(passphrase));
+ xfree(passphrase);
+ 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", 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);
+
+ printf("The comment in your key file has been changed.\n");
+ exit(0);
}
-/* Main program for key management. */
+void
+usage(void)
+{
+ printf("Usage: %s [-lpqxXyc] [-t type] [-b bits] [-f file] [-C comment] "
+ "[-N new-pass] [-P pass]\n", __progname);
+ exit(1);
+}
+/*
+ * Main program for key management.
+ */
int
main(int ac, char **av)
{
- char buf[16384], buf2[1024], *passphrase1, *passphrase2;
- struct passwd *pw;
- char *file, *tmpbuf;
- int opt;
- struct stat st;
- FILE *f;
- char hostname[MAXHOSTNAMELEN];
- extern int optind;
- extern char *optarg;
-
- /* check if RSA support exists */
- if (rsa_alive() == 0) {
- extern char *__progname;
-
- fprintf(stderr,
- "%s: no RSA support in libssl and libcrypto. See ssl(8).\n",
- __progname);
- exit(1);
- }
-
- /* Get user\'s passwd structure. We need this for the home directory. */
- pw = getpwuid(getuid());
- if (!pw)
- {
- printf("You don't exist, go away!\n");
- exit(1);
- }
-
- /* Create ~/.ssh directory if it doesn\'t already exist. */
- snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_USER_DIR);
- if (stat(buf, &st) < 0)
- if (mkdir(buf, 0755) < 0)
- error("Could not create directory '%s'.", buf);
-
- /* Parse command line arguments. */
- while ((opt = getopt(ac, av, "qpclb:f:P:N:C:")) != EOF)
- {
- switch (opt)
- {
- case 'b':
- bits = atoi(optarg);
- if (bits < 512 || bits > 32768)
- {
- printf("Bits has bad value.\n");
- exit(1);
- }
- break;
-
- case 'l':
- print_fingerprint = 1;
- break;
-
- case 'p':
- change_passphrase = 1;
- break;
-
- case 'c':
- change_comment = 1;
- break;
-
- case 'f':
- identity_file = optarg;
- break;
-
- case 'P':
- identity_passphrase = optarg;
- break;
-
- case 'N':
- identity_new_passphrase = optarg;
- break;
-
- case 'C':
- identity_comment = optarg;
- break;
-
- case 'q':
- quiet = 1;
- break;
-
- case '?':
- default:
- printf("ssh-keygen version %s\n", SSH_VERSION);
- printf("Usage: %s [-b bits] [-p] [-c] [-f file] [-P pass] [-N new-pass] [-C comment]\n", av[0]);
- exit(1);
- }
- }
- if (optind < ac)
- {
- printf("Too many arguments.\n");
- exit(1);
- }
- if (change_passphrase && change_comment)
- {
- printf("Can only have one of -p and -c.\n");
- exit(1);
- }
-
- if (print_fingerprint)
- do_fingerprint(pw);
-
- /* If the user requested to change the passphrase, do it now. This
- function never returns. */
- if (change_passphrase)
- do_change_passphrase(pw);
-
- /* If the user requested to change the comment, do it now. This function
- never returns. */
- if (change_comment)
- do_change_comment(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);
-
- ask_file_again:
-
- file = get_filename(pw, "Enter file in which to save the key");
-
- /* If the file aready exists, ask the user to confirm. */
- if (stat(file, &st) >= 0)
- {
- printf("%s already exists.\n", file);
- printf("Overwrite (y/n)? ");
- fflush(stdout);
- if (fgets(buf2, sizeof(buf2), stdin) == NULL)
- exit(1);
- if (buf2[0] != 'y' && buf2[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): ", 1);
- passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
- 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);
- }
-
- /* Create default commend field for the passphrase. The user can later
- edit this field. */
- if (identity_comment)
- {
- strlcpy(buf2, identity_comment, sizeof(buf2));
- }
- else
- {
- if (gethostname(hostname, sizeof(hostname)) < 0)
- {
- perror("gethostname");
- exit(1);
- }
- snprintf(buf2, sizeof buf2, "%s@%s", pw->pw_name, hostname);
- }
-
- /* Save the key with the given passphrase and comment. */
- if (!save_private_key(file, passphrase1, private_key, buf2))
- {
- printf("Saving the key failed: %s: %s.\n",
- file, strerror(errno));
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
- xfree(file);
- goto ask_file_again;
- }
- /* Clear the passphrase. */
- memset(passphrase1, 0, strlen(passphrase1));
- xfree(passphrase1);
-
- /* Clear the private key and the random number generator. */
- RSA_free(private_key);
- arc4random_stir();
-
- if (!quiet)
- printf("Your identification has been saved in %s.\n", file);
-
- /* Display the public key on the screen. */
- if (!quiet) {
- printf("Your public key is:\n");
- printf("%d ", BN_num_bits(public_key->n));
- tmpbuf = BN_bn2dec(public_key->e);
- printf("%s ", tmpbuf);
- free(tmpbuf);
- tmpbuf = BN_bn2dec(public_key->n);
- printf("%s %s\n", tmpbuf, buf2);
- free(tmpbuf);
- }
-
- /* Save the public key in text format in a file with the same name but
- .pub appended. */
- file = xrealloc(file, strlen(file) + 5);
- strcat(file, ".pub");
- f = fopen(file, "w");
- if (!f)
- {
- printf("Could not save your public key in %s\n", 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, buf2);
- free(tmpbuf);
- fclose(f);
-
- if (!quiet)
- printf("Your public key has been saved in %s\n", file);
-
- exit(0);
+ char dotsshdir[16 * 1024], comment[1024], *passphrase1, *passphrase2;
+ Key *private, *public;
+ struct passwd *pw;
+ int opt, type, fd;
+ struct stat st;
+ FILE *f;
+
+ extern int optind;
+ extern char *optarg;
+
+ __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, "dqpclBRxXyb:f:t:P:N:C:")) != -1) {
+ switch (opt) {
+ case 'b':
+ bits = atoi(optarg);
+ if (bits < 512 || bits > 32768) {
+ printf("Bits has bad value.\n");
+ exit(1);
+ }
+ break;
+
+ case 'l':
+ print_fingerprint = 1;
+ break;
+
+ case 'B':
+ print_bubblebabble = 1;
+ break;
+
+ case 'p':
+ change_passphrase = 1;
+ break;
+
+ case 'c':
+ change_comment = 1;
+ break;
+
+ case 'f':
+ strlcpy(identity_file, optarg, sizeof(identity_file));
+ have_identity = 1;
+ break;
+
+ case 'P':
+ identity_passphrase = optarg;
+ break;
+
+ case 'N':
+ identity_new_passphrase = optarg;
+ break;
+
+ case 'C':
+ identity_comment = optarg;
+ break;
+
+ case 'q':
+ 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();
+ }
+ }
+ if (optind < ac) {
+ 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 || 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();
+
+ 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, _PATH_SSH_USER_DIR);
+ if (strstr(identity_file, dotsshdir) != NULL &&
+ stat(dotsshdir, &st) < 0) {
+ if (mkdir(dotsshdir, 0700) < 0)
+ error("Could not create directory '%s'.", dotsshdir);
+ 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): ", 1);
+ passphrase2 = read_passphrase("Enter same passphrase again: ", 1);
+ 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 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, comment)) {
+ printf("Saving the key failed: %s: %s.\n",
+ identity_file, strerror(errno));
+ 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", identity_file);
+ exit(1);
+ }
+ if (!key_write(public, f))
+ fprintf(stderr, "write key failed");
+ fprintf(f, " %s\n", comment);
+ fclose(f);
+
+ if (!quiet) {
+ 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("%s %s\n", fp, comment);
+ xfree(fp);
+ }
+
+ key_free(public);
+ exit(0);
}
andersk / openssh.git / blobdiff