2015-07-02 13:18:50 +00:00
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/* $OpenBSD: authfile.c,v 1.114 2015/04/17 13:32:09 djm Exp $ */
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2000-02-24 14:29:47 +00:00
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/*
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2014-01-30 10:56:49 +00:00
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* Copyright (c) 2000, 2013 Markus Friedl. All rights reserved.
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2000-09-10 08:31:17 +00:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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2000-02-24 14:29:47 +00:00
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*/
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#include "includes.h"
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2006-09-30 13:29:51 +00:00
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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2000-05-15 04:37:24 +00:00
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2006-09-30 13:29:51 +00:00
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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2015-01-05 16:09:55 +00:00
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#include <stdarg.h>
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2006-09-30 13:29:51 +00:00
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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2015-07-02 13:15:34 +00:00
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#include <limits.h>
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2006-09-30 13:29:51 +00:00
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#include "cipher.h"
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2000-05-15 04:37:24 +00:00
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#include "key.h"
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2001-05-04 03:57:05 +00:00
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#include "ssh.h"
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#include "log.h"
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#include "authfile.h"
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2002-03-18 09:55:03 +00:00
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#include "rsa.h"
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2005-06-05 15:40:50 +00:00
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#include "misc.h"
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2005-09-03 06:59:33 +00:00
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#include "atomicio.h"
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2015-01-05 16:09:55 +00:00
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#include "sshbuf.h"
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#include "ssherr.h"
|
2015-07-02 13:15:34 +00:00
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#include "krl.h"
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2000-02-24 14:29:47 +00:00
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2011-09-28 08:14:41 +00:00
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#define MAX_KEY_FILE_SIZE (1024 * 1024)
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2011-02-17 11:47:40 +00:00
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/* Save a key blob to a file */
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static int
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2015-01-05 16:09:55 +00:00
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sshkey_save_private_blob(struct sshbuf *keybuf, const char *filename)
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2011-02-17 11:47:40 +00:00
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{
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2015-01-05 16:09:55 +00:00
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int fd, oerrno;
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2011-02-17 11:47:40 +00:00
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2015-01-05 16:09:55 +00:00
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if ((fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0600)) < 0)
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return SSH_ERR_SYSTEM_ERROR;
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if (atomicio(vwrite, fd, (u_char *)sshbuf_ptr(keybuf),
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sshbuf_len(keybuf)) != sshbuf_len(keybuf)) {
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oerrno = errno;
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2011-02-17 11:47:40 +00:00
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close(fd);
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unlink(filename);
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2015-01-05 16:09:55 +00:00
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errno = oerrno;
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return SSH_ERR_SYSTEM_ERROR;
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2011-02-17 11:47:40 +00:00
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}
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close(fd);
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2015-01-05 16:09:55 +00:00
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return 0;
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2011-02-17 11:47:40 +00:00
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}
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int
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2015-01-05 16:09:55 +00:00
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sshkey_save_private(struct sshkey *key, const char *filename,
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const char *passphrase, const char *comment,
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int force_new_format, const char *new_format_cipher, int new_format_rounds)
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2011-02-17 11:47:40 +00:00
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{
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2015-01-05 16:09:55 +00:00
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struct sshbuf *keyblob = NULL;
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int r;
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2011-02-17 11:47:40 +00:00
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2015-01-05 16:09:55 +00:00
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if ((keyblob = sshbuf_new()) == NULL)
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return SSH_ERR_ALLOC_FAIL;
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if ((r = sshkey_private_to_fileblob(key, keyblob, passphrase, comment,
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force_new_format, new_format_cipher, new_format_rounds)) != 0)
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2011-02-17 11:47:40 +00:00
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goto out;
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2015-01-05 16:09:55 +00:00
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if ((r = sshkey_save_private_blob(keyblob, filename)) != 0)
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2011-02-17 11:47:40 +00:00
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goto out;
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2015-01-05 16:09:55 +00:00
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r = 0;
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2011-02-17 11:47:40 +00:00
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out:
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2015-01-05 16:09:55 +00:00
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sshbuf_free(keyblob);
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return r;
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2011-02-17 11:47:40 +00:00
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}
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2011-09-28 08:14:41 +00:00
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/* Load a key from a fd into a buffer */
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int
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2015-07-02 13:15:34 +00:00
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sshkey_load_file(int fd, struct sshbuf *blob)
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2011-02-17 11:47:40 +00:00
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{
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2011-09-28 08:14:41 +00:00
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u_char buf[1024];
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2004-10-28 16:03:53 +00:00
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size_t len;
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2011-02-17 11:47:40 +00:00
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struct stat st;
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2015-01-05 16:09:55 +00:00
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int r;
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2000-02-24 14:29:47 +00:00
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2015-01-05 16:09:55 +00:00
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if (fstat(fd, &st) < 0)
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return SSH_ERR_SYSTEM_ERROR;
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2011-09-28 08:14:41 +00:00
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if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
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2015-01-05 16:09:55 +00:00
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st.st_size > MAX_KEY_FILE_SIZE)
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return SSH_ERR_INVALID_FORMAT;
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2011-09-28 08:14:41 +00:00
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for (;;) {
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if ((len = atomicio(read, fd, buf, sizeof(buf))) == 0) {
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if (errno == EPIPE)
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break;
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2015-01-05 16:09:55 +00:00
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r = SSH_ERR_SYSTEM_ERROR;
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goto out;
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2011-09-28 08:14:41 +00:00
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}
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2015-01-05 16:09:55 +00:00
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if ((r = sshbuf_put(blob, buf, len)) != 0)
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goto out;
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if (sshbuf_len(blob) > MAX_KEY_FILE_SIZE) {
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r = SSH_ERR_INVALID_FORMAT;
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goto out;
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2011-09-28 08:14:41 +00:00
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}
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}
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if ((st.st_mode & (S_IFSOCK|S_IFCHR|S_IFIFO)) == 0 &&
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2015-01-05 16:09:55 +00:00
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st.st_size != (off_t)sshbuf_len(blob)) {
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r = SSH_ERR_FILE_CHANGED;
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goto out;
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2000-02-24 14:29:47 +00:00
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}
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2015-01-05 16:09:55 +00:00
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r = 0;
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2011-09-28 08:14:41 +00:00
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2015-01-05 16:09:55 +00:00
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out:
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explicit_bzero(buf, sizeof(buf));
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if (r != 0)
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sshbuf_reset(blob);
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return r;
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2011-02-17 11:47:40 +00:00
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}
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2000-02-24 14:29:47 +00:00
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2015-01-05 16:09:55 +00:00
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#ifdef WITH_SSH1
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2011-02-17 11:47:40 +00:00
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/*
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* Loads the public part of the ssh v1 key file. Returns NULL if an error was
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* encountered (the file does not exist or is not readable), and the key
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* otherwise.
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*/
|
2015-01-05 16:09:55 +00:00
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static int
|
2015-07-02 13:15:34 +00:00
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sshkey_load_public_rsa1(int fd, struct sshkey **keyp, char **commentp)
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2011-02-17 11:47:40 +00:00
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{
|
2015-01-05 16:09:55 +00:00
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struct sshbuf *b = NULL;
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int r;
|
2000-02-24 14:29:47 +00:00
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2015-01-05 16:09:55 +00:00
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*keyp = NULL;
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if (commentp != NULL)
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*commentp = NULL;
|
2001-05-04 03:57:05 +00:00
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|
2015-01-05 16:09:55 +00:00
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if ((b = sshbuf_new()) == NULL)
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return SSH_ERR_ALLOC_FAIL;
|
2015-07-02 13:15:34 +00:00
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if ((r = sshkey_load_file(fd, b)) != 0)
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2015-01-05 16:09:55 +00:00
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goto out;
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if ((r = sshkey_parse_public_rsa1_fileblob(b, keyp, commentp)) != 0)
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goto out;
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r = 0;
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out:
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sshbuf_free(b);
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return r;
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2000-05-15 04:37:24 +00:00
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}
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2015-01-05 16:09:55 +00:00
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#endif /* WITH_SSH1 */
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2000-05-15 04:37:24 +00:00
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2015-01-05 16:09:55 +00:00
|
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/* XXX remove error() calls from here? */
|
2006-09-30 13:29:51 +00:00
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int
|
2015-01-05 16:09:55 +00:00
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sshkey_perm_ok(int fd, const char *filename)
|
2000-05-15 04:37:24 +00:00
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{
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struct stat st;
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|
2002-03-18 09:55:03 +00:00
|
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if (fstat(fd, &st) < 0)
|
2015-01-05 16:09:55 +00:00
|
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return SSH_ERR_SYSTEM_ERROR;
|
2002-03-18 09:55:03 +00:00
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/*
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|
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* if a key owned by the user is accessed, then we check the
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|
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* permissions of the file. if the key owned by a different user,
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* then we don't care.
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*/
|
2002-06-27 22:31:32 +00:00
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#ifdef HAVE_CYGWIN
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|
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if (check_ntsec(filename))
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#endif
|
2002-03-18 09:55:03 +00:00
|
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|
if ((st.st_uid == getuid()) && (st.st_mode & 077) != 0) {
|
2000-05-15 04:37:24 +00:00
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error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
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error("@ WARNING: UNPROTECTED PRIVATE KEY FILE! @");
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error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
|
2002-03-18 09:55:03 +00:00
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|
error("Permissions 0%3.3o for '%s' are too open.",
|
2004-01-07 11:10:17 +00:00
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|
(u_int)st.st_mode & 0777, filename);
|
2015-07-02 13:18:50 +00:00
|
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|
error("It is required that your private key files are NOT accessible by others.");
|
2001-05-04 03:57:05 +00:00
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|
error("This private key will be ignored.");
|
2015-01-05 16:09:55 +00:00
|
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|
return SSH_ERR_KEY_BAD_PERMISSIONS;
|
2000-05-15 04:37:24 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
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|
return 0;
|
2001-05-04 03:57:05 +00:00
|
|
|
}
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
/* XXX kill perm_ok now that we have SSH_ERR_KEY_BAD_PERMISSIONS? */
|
|
|
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int
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|
sshkey_load_private_type(int type, const char *filename, const char *passphrase,
|
|
|
|
struct sshkey **keyp, char **commentp, int *perm_ok)
|
2011-02-17 11:47:40 +00:00
|
|
|
{
|
2015-01-05 16:09:55 +00:00
|
|
|
int fd, r;
|
2014-01-30 10:56:49 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
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|
*keyp = NULL;
|
|
|
|
if (commentp != NULL)
|
|
|
|
*commentp = NULL;
|
2001-05-04 03:57:05 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((fd = open(filename, O_RDONLY)) < 0) {
|
2010-03-08 11:19:52 +00:00
|
|
|
if (perm_ok != NULL)
|
|
|
|
*perm_ok = 0;
|
2015-01-05 16:09:55 +00:00
|
|
|
return SSH_ERR_SYSTEM_ERROR;
|
2010-03-08 11:19:52 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
if (sshkey_perm_ok(fd, filename) != 0) {
|
2006-09-30 13:29:51 +00:00
|
|
|
if (perm_ok != NULL)
|
|
|
|
*perm_ok = 0;
|
2015-01-05 16:09:55 +00:00
|
|
|
r = SSH_ERR_KEY_BAD_PERMISSIONS;
|
|
|
|
goto out;
|
2001-05-04 03:57:05 +00:00
|
|
|
}
|
2006-09-30 13:29:51 +00:00
|
|
|
if (perm_ok != NULL)
|
|
|
|
*perm_ok = 1;
|
2011-02-17 11:47:40 +00:00
|
|
|
|
2015-07-02 13:15:34 +00:00
|
|
|
r = sshkey_load_private_type_fd(fd, type, passphrase, keyp, commentp);
|
|
|
|
out:
|
|
|
|
close(fd);
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
sshkey_load_private_type_fd(int fd, int type, const char *passphrase,
|
|
|
|
struct sshkey **keyp, char **commentp)
|
|
|
|
{
|
|
|
|
struct sshbuf *buffer = NULL;
|
|
|
|
int r;
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((buffer = sshbuf_new()) == NULL) {
|
|
|
|
r = SSH_ERR_ALLOC_FAIL;
|
|
|
|
goto out;
|
2000-05-15 04:37:24 +00:00
|
|
|
}
|
2015-07-02 13:15:34 +00:00
|
|
|
if ((r = sshkey_load_file(fd, buffer)) != 0 ||
|
|
|
|
(r = sshkey_parse_private_fileblob_type(buffer, type,
|
|
|
|
passphrase, keyp, commentp)) != 0)
|
2015-01-05 16:09:55 +00:00
|
|
|
goto out;
|
2015-07-02 13:15:34 +00:00
|
|
|
|
|
|
|
/* success */
|
2015-01-05 16:09:55 +00:00
|
|
|
r = 0;
|
|
|
|
out:
|
|
|
|
if (buffer != NULL)
|
|
|
|
sshbuf_free(buffer);
|
|
|
|
return r;
|
2001-05-04 03:57:05 +00:00
|
|
|
}
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
/* XXX this is almost identical to sshkey_load_private_type() */
|
|
|
|
int
|
|
|
|
sshkey_load_private(const char *filename, const char *passphrase,
|
|
|
|
struct sshkey **keyp, char **commentp)
|
2011-09-28 08:14:41 +00:00
|
|
|
{
|
2015-01-05 16:09:55 +00:00
|
|
|
struct sshbuf *buffer = NULL;
|
|
|
|
int r, fd;
|
2011-09-28 08:14:41 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
*keyp = NULL;
|
|
|
|
if (commentp != NULL)
|
|
|
|
*commentp = NULL;
|
2001-05-04 03:57:05 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((fd = open(filename, O_RDONLY)) < 0)
|
|
|
|
return SSH_ERR_SYSTEM_ERROR;
|
|
|
|
if (sshkey_perm_ok(fd, filename) != 0) {
|
|
|
|
r = SSH_ERR_KEY_BAD_PERMISSIONS;
|
|
|
|
goto out;
|
2001-05-04 03:57:05 +00:00
|
|
|
}
|
2011-02-17 11:47:40 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((buffer = sshbuf_new()) == NULL) {
|
|
|
|
r = SSH_ERR_ALLOC_FAIL;
|
|
|
|
goto out;
|
2011-02-17 11:47:40 +00:00
|
|
|
}
|
2015-07-02 13:15:34 +00:00
|
|
|
if ((r = sshkey_load_file(fd, buffer)) != 0 ||
|
2015-01-05 16:09:55 +00:00
|
|
|
(r = sshkey_parse_private_fileblob(buffer, passphrase, filename,
|
|
|
|
keyp, commentp)) != 0)
|
|
|
|
goto out;
|
|
|
|
r = 0;
|
|
|
|
out:
|
2011-02-17 11:47:40 +00:00
|
|
|
close(fd);
|
2015-01-05 16:09:55 +00:00
|
|
|
if (buffer != NULL)
|
|
|
|
sshbuf_free(buffer);
|
|
|
|
return r;
|
2000-05-15 04:37:24 +00:00
|
|
|
}
|
2000-09-10 08:31:17 +00:00
|
|
|
|
2002-03-18 09:55:03 +00:00
|
|
|
static int
|
2015-01-05 16:09:55 +00:00
|
|
|
sshkey_try_load_public(struct sshkey *k, const char *filename, char **commentp)
|
2000-09-10 08:31:17 +00:00
|
|
|
{
|
|
|
|
FILE *f;
|
2005-06-05 15:40:50 +00:00
|
|
|
char line[SSH_MAX_PUBKEY_BYTES];
|
2000-09-10 08:31:17 +00:00
|
|
|
char *cp;
|
2005-06-05 15:40:50 +00:00
|
|
|
u_long linenum = 0;
|
2015-01-05 16:09:55 +00:00
|
|
|
int r;
|
2000-09-10 08:31:17 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if (commentp != NULL)
|
|
|
|
*commentp = NULL;
|
|
|
|
if ((f = fopen(filename, "r")) == NULL)
|
|
|
|
return SSH_ERR_SYSTEM_ERROR;
|
|
|
|
while (read_keyfile_line(f, filename, line, sizeof(line),
|
|
|
|
&linenum) != -1) {
|
|
|
|
cp = line;
|
|
|
|
switch (*cp) {
|
|
|
|
case '#':
|
|
|
|
case '\n':
|
|
|
|
case '\0':
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/* Abort loading if this looks like a private key */
|
|
|
|
if (strncmp(cp, "-----BEGIN", 10) == 0 ||
|
|
|
|
strcmp(cp, "SSH PRIVATE KEY FILE") == 0)
|
|
|
|
break;
|
|
|
|
/* Skip leading whitespace. */
|
|
|
|
for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
|
|
|
|
;
|
|
|
|
if (*cp) {
|
|
|
|
if ((r = sshkey_read(k, &cp)) == 0) {
|
|
|
|
cp[strcspn(cp, "\r\n")] = '\0';
|
|
|
|
if (commentp) {
|
|
|
|
*commentp = strdup(*cp ?
|
|
|
|
cp : filename);
|
|
|
|
if (*commentp == NULL)
|
|
|
|
r = SSH_ERR_ALLOC_FAIL;
|
2000-09-10 08:31:17 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
fclose(f);
|
|
|
|
return r;
|
2000-09-10 08:31:17 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
fclose(f);
|
|
|
|
return SSH_ERR_INVALID_FORMAT;
|
2000-09-10 08:31:17 +00:00
|
|
|
}
|
|
|
|
|
2001-05-04 03:57:05 +00:00
|
|
|
/* load public key from ssh v1 private or any pubkey file */
|
2015-01-05 16:09:55 +00:00
|
|
|
int
|
|
|
|
sshkey_load_public(const char *filename, struct sshkey **keyp, char **commentp)
|
2000-09-10 08:31:17 +00:00
|
|
|
{
|
2015-01-05 16:09:55 +00:00
|
|
|
struct sshkey *pub = NULL;
|
2015-07-02 13:15:34 +00:00
|
|
|
char file[PATH_MAX];
|
2015-01-05 16:09:55 +00:00
|
|
|
int r, fd;
|
|
|
|
|
|
|
|
if (keyp != NULL)
|
|
|
|
*keyp = NULL;
|
|
|
|
if (commentp != NULL)
|
|
|
|
*commentp = NULL;
|
2001-05-04 03:57:05 +00:00
|
|
|
|
2015-07-02 13:15:34 +00:00
|
|
|
/* XXX should load file once and attempt to parse each format */
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((fd = open(filename, O_RDONLY)) < 0)
|
|
|
|
goto skip;
|
|
|
|
#ifdef WITH_SSH1
|
2004-01-07 11:10:17 +00:00
|
|
|
/* try rsa1 private key */
|
2015-07-02 13:15:34 +00:00
|
|
|
r = sshkey_load_public_rsa1(fd, keyp, commentp);
|
2015-01-05 16:09:55 +00:00
|
|
|
close(fd);
|
|
|
|
switch (r) {
|
|
|
|
case SSH_ERR_INTERNAL_ERROR:
|
|
|
|
case SSH_ERR_ALLOC_FAIL:
|
|
|
|
case SSH_ERR_INVALID_ARGUMENT:
|
|
|
|
case SSH_ERR_SYSTEM_ERROR:
|
|
|
|
case 0:
|
|
|
|
return r;
|
|
|
|
}
|
2015-07-02 13:18:50 +00:00
|
|
|
#else /* WITH_SSH1 */
|
|
|
|
close(fd);
|
2015-01-05 16:09:55 +00:00
|
|
|
#endif /* WITH_SSH1 */
|
2004-01-07 11:10:17 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
/* try ssh2 public key */
|
|
|
|
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
|
|
return SSH_ERR_ALLOC_FAIL;
|
|
|
|
if ((r = sshkey_try_load_public(pub, filename, commentp)) == 0) {
|
|
|
|
if (keyp != NULL)
|
|
|
|
*keyp = pub;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
sshkey_free(pub);
|
|
|
|
|
|
|
|
#ifdef WITH_SSH1
|
2004-01-07 11:10:17 +00:00
|
|
|
/* try rsa1 public key */
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((pub = sshkey_new(KEY_RSA1)) == NULL)
|
|
|
|
return SSH_ERR_ALLOC_FAIL;
|
|
|
|
if ((r = sshkey_try_load_public(pub, filename, commentp)) == 0) {
|
|
|
|
if (keyp != NULL)
|
|
|
|
*keyp = pub;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
sshkey_free(pub);
|
|
|
|
#endif /* WITH_SSH1 */
|
2004-01-07 11:10:17 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
skip:
|
|
|
|
/* try .pub suffix */
|
|
|
|
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL)
|
|
|
|
return SSH_ERR_ALLOC_FAIL;
|
|
|
|
r = SSH_ERR_ALLOC_FAIL; /* in case strlcpy or strlcat fail */
|
2001-05-04 03:57:05 +00:00
|
|
|
if ((strlcpy(file, filename, sizeof file) < sizeof(file)) &&
|
|
|
|
(strlcat(file, ".pub", sizeof file) < sizeof(file)) &&
|
2015-01-05 16:09:55 +00:00
|
|
|
(r = sshkey_try_load_public(pub, file, commentp)) == 0) {
|
|
|
|
if (keyp != NULL)
|
|
|
|
*keyp = pub;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
sshkey_free(pub);
|
2015-07-02 13:15:34 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
return r;
|
2000-09-10 08:31:17 +00:00
|
|
|
}
|
2010-03-08 11:19:52 +00:00
|
|
|
|
2010-11-08 10:45:44 +00:00
|
|
|
/* Load the certificate associated with the named private key */
|
2015-01-05 16:09:55 +00:00
|
|
|
int
|
|
|
|
sshkey_load_cert(const char *filename, struct sshkey **keyp)
|
2010-11-08 10:45:44 +00:00
|
|
|
{
|
2015-01-05 16:09:55 +00:00
|
|
|
struct sshkey *pub = NULL;
|
|
|
|
char *file = NULL;
|
|
|
|
int r = SSH_ERR_INTERNAL_ERROR;
|
2010-11-08 10:45:44 +00:00
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
*keyp = NULL;
|
|
|
|
|
|
|
|
if (asprintf(&file, "%s-cert.pub", filename) == -1)
|
|
|
|
return SSH_ERR_ALLOC_FAIL;
|
|
|
|
|
|
|
|
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) {
|
|
|
|
goto out;
|
2010-11-08 10:45:44 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((r = sshkey_try_load_public(pub, file, NULL)) != 0)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
*keyp = pub;
|
|
|
|
pub = NULL;
|
|
|
|
r = 0;
|
|
|
|
|
|
|
|
out:
|
|
|
|
if (file != NULL)
|
|
|
|
free(file);
|
|
|
|
if (pub != NULL)
|
|
|
|
sshkey_free(pub);
|
|
|
|
return r;
|
2010-11-08 10:45:44 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Load private key and certificate */
|
2015-01-05 16:09:55 +00:00
|
|
|
int
|
|
|
|
sshkey_load_private_cert(int type, const char *filename, const char *passphrase,
|
|
|
|
struct sshkey **keyp, int *perm_ok)
|
2010-11-08 10:45:44 +00:00
|
|
|
{
|
2015-01-05 16:09:55 +00:00
|
|
|
struct sshkey *key = NULL, *cert = NULL;
|
|
|
|
int r;
|
|
|
|
|
|
|
|
*keyp = NULL;
|
2010-11-08 10:45:44 +00:00
|
|
|
|
|
|
|
switch (type) {
|
2015-01-05 16:09:55 +00:00
|
|
|
#ifdef WITH_OPENSSL
|
2010-11-08 10:45:44 +00:00
|
|
|
case KEY_RSA:
|
|
|
|
case KEY_DSA:
|
2011-02-17 11:47:40 +00:00
|
|
|
case KEY_ECDSA:
|
2014-01-30 10:56:49 +00:00
|
|
|
case KEY_ED25519:
|
2015-01-05 16:09:55 +00:00
|
|
|
#endif /* WITH_OPENSSL */
|
|
|
|
case KEY_UNSPEC:
|
2010-11-08 10:45:44 +00:00
|
|
|
break;
|
|
|
|
default:
|
2015-01-05 16:09:55 +00:00
|
|
|
return SSH_ERR_KEY_TYPE_UNKNOWN;
|
2010-11-08 10:45:44 +00:00
|
|
|
}
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((r = sshkey_load_private_type(type, filename,
|
|
|
|
passphrase, &key, NULL, perm_ok)) != 0 ||
|
|
|
|
(r = sshkey_load_cert(filename, &cert)) != 0)
|
|
|
|
goto out;
|
2010-11-08 10:45:44 +00:00
|
|
|
|
|
|
|
/* Make sure the private key matches the certificate */
|
2015-01-05 16:09:55 +00:00
|
|
|
if (sshkey_equal_public(key, cert) == 0) {
|
|
|
|
r = SSH_ERR_KEY_CERT_MISMATCH;
|
|
|
|
goto out;
|
2010-11-08 10:45:44 +00:00
|
|
|
}
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((r = sshkey_to_certified(key, sshkey_cert_is_legacy(cert))) != 0 ||
|
|
|
|
(r = sshkey_cert_copy(cert, key)) != 0)
|
|
|
|
goto out;
|
|
|
|
r = 0;
|
|
|
|
*keyp = key;
|
|
|
|
key = NULL;
|
|
|
|
out:
|
|
|
|
if (key != NULL)
|
|
|
|
sshkey_free(key);
|
|
|
|
if (cert != NULL)
|
|
|
|
sshkey_free(cert);
|
|
|
|
return r;
|
2010-11-08 10:45:44 +00:00
|
|
|
}
|
|
|
|
|
2010-03-08 11:19:52 +00:00
|
|
|
/*
|
2015-01-05 16:09:55 +00:00
|
|
|
* Returns success if the specified "key" is listed in the file "filename",
|
|
|
|
* SSH_ERR_KEY_NOT_FOUND: if the key is not listed or another error.
|
2015-07-02 13:15:34 +00:00
|
|
|
* If "strict_type" is set then the key type must match exactly,
|
2010-03-08 11:19:52 +00:00
|
|
|
* otherwise a comparison that ignores certficiate data is performed.
|
2015-07-02 13:15:34 +00:00
|
|
|
* If "check_ca" is set and "key" is a certificate, then its CA key is
|
|
|
|
* also checked and sshkey_in_file() will return success if either is found.
|
2010-03-08 11:19:52 +00:00
|
|
|
*/
|
|
|
|
int
|
2015-07-02 13:15:34 +00:00
|
|
|
sshkey_in_file(struct sshkey *key, const char *filename, int strict_type,
|
|
|
|
int check_ca)
|
2010-03-08 11:19:52 +00:00
|
|
|
{
|
|
|
|
FILE *f;
|
|
|
|
char line[SSH_MAX_PUBKEY_BYTES];
|
|
|
|
char *cp;
|
|
|
|
u_long linenum = 0;
|
2015-01-05 16:09:55 +00:00
|
|
|
int r = 0;
|
|
|
|
struct sshkey *pub = NULL;
|
|
|
|
int (*sshkey_compare)(const struct sshkey *, const struct sshkey *) =
|
|
|
|
strict_type ? sshkey_equal : sshkey_equal_public;
|
2010-03-08 11:19:52 +00:00
|
|
|
|
2015-07-02 13:15:34 +00:00
|
|
|
if ((f = fopen(filename, "r")) == NULL)
|
|
|
|
return SSH_ERR_SYSTEM_ERROR;
|
2010-03-08 11:19:52 +00:00
|
|
|
|
|
|
|
while (read_keyfile_line(f, filename, line, sizeof(line),
|
2015-01-05 16:09:55 +00:00
|
|
|
&linenum) != -1) {
|
2010-03-08 11:19:52 +00:00
|
|
|
cp = line;
|
|
|
|
|
|
|
|
/* Skip leading whitespace. */
|
|
|
|
for (; *cp && (*cp == ' ' || *cp == '\t'); cp++)
|
|
|
|
;
|
|
|
|
|
|
|
|
/* Skip comments and empty lines */
|
|
|
|
switch (*cp) {
|
|
|
|
case '#':
|
|
|
|
case '\n':
|
|
|
|
case '\0':
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((pub = sshkey_new(KEY_UNSPEC)) == NULL) {
|
|
|
|
r = SSH_ERR_ALLOC_FAIL;
|
|
|
|
goto out;
|
2010-03-08 11:19:52 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
if ((r = sshkey_read(pub, &cp)) != 0)
|
|
|
|
goto out;
|
2015-07-02 13:15:34 +00:00
|
|
|
if (sshkey_compare(key, pub) ||
|
|
|
|
(check_ca && sshkey_is_cert(key) &&
|
|
|
|
sshkey_compare(key->cert->signature_key, pub))) {
|
2015-01-05 16:09:55 +00:00
|
|
|
r = 0;
|
|
|
|
goto out;
|
2010-03-08 11:19:52 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
sshkey_free(pub);
|
|
|
|
pub = NULL;
|
2010-03-08 11:19:52 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
r = SSH_ERR_KEY_NOT_FOUND;
|
|
|
|
out:
|
|
|
|
if (pub != NULL)
|
|
|
|
sshkey_free(pub);
|
2010-03-08 11:19:52 +00:00
|
|
|
fclose(f);
|
2015-01-05 16:09:55 +00:00
|
|
|
return r;
|
2010-03-08 11:19:52 +00:00
|
|
|
}
|
2015-01-05 16:09:55 +00:00
|
|
|
|
2015-07-02 13:15:34 +00:00
|
|
|
/*
|
|
|
|
* Checks whether the specified key is revoked, returning 0 if not,
|
|
|
|
* SSH_ERR_KEY_REVOKED if it is or another error code if something
|
|
|
|
* unexpected happened.
|
|
|
|
* This will check both the key and, if it is a certificate, its CA key too.
|
|
|
|
* "revoked_keys_file" may be a KRL or a one-per-line list of public keys.
|
|
|
|
*/
|
|
|
|
int
|
|
|
|
sshkey_check_revoked(struct sshkey *key, const char *revoked_keys_file)
|
|
|
|
{
|
|
|
|
int r;
|
|
|
|
|
|
|
|
r = ssh_krl_file_contains_key(revoked_keys_file, key);
|
|
|
|
/* If this was not a KRL to begin with then continue below */
|
|
|
|
if (r != SSH_ERR_KRL_BAD_MAGIC)
|
|
|
|
return r;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the file is not a KRL or we can't handle KRLs then attempt to
|
|
|
|
* parse the file as a flat list of keys.
|
|
|
|
*/
|
|
|
|
switch ((r = sshkey_in_file(key, revoked_keys_file, 0, 1))) {
|
|
|
|
case 0:
|
|
|
|
/* Key found => revoked */
|
|
|
|
return SSH_ERR_KEY_REVOKED;
|
|
|
|
case SSH_ERR_KEY_NOT_FOUND:
|
|
|
|
/* Key not found => not revoked */
|
|
|
|
return 0;
|
|
|
|
default:
|
|
|
|
/* Some other error occurred */
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|