-/* $OpenBSD: bufaux.c,v 1.50 2010/08/31 09:58:37 djm Exp $ */
+/* $OpenBSD: bufaux.c,v 1.60 2014/04/30 05:29:56 djm Exp $ */
/*
- * Author: Tatu Ylonen <ylo@cs.hut.fi>
- * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- * All rights reserved
- * Auxiliary functions for storing and retrieving various data types to/from
- * Buffers.
+ * Copyright (c) 2012 Damien Miller <djm@mindrot.org>
*
- * 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".
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
*
- *
- * SSH2 packet format added by Markus Friedl
- * Copyright (c) 2000 Markus Friedl. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+/* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */
+
#include "includes.h"
#include <sys/types.h>
-#include <openssl/bn.h>
-
-#include <string.h>
-#include <stdarg.h>
-
-#include "xmalloc.h"
#include "buffer.h"
#include "log.h"
-#include "misc.h"
-
-/*
- * Returns integers from the buffer (msb first).
- */
+#include "ssherr.h"
int
-buffer_get_short_ret(u_short *ret, Buffer *buffer)
+buffer_get_short_ret(u_short *v, Buffer *buffer)
{
- u_char buf[2];
+ int ret;
- if (buffer_get_ret(buffer, (char *) buf, 2) == -1)
- return (-1);
- *ret = get_u16(buf);
- return (0);
+ if ((ret = sshbuf_get_u16(buffer, v)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
+ return -1;
+ }
+ return 0;
}
u_short
u_short ret;
if (buffer_get_short_ret(&ret, buffer) == -1)
- fatal("buffer_get_short: buffer error");
+ fatal("%s: buffer error", __func__);
return (ret);
}
int
-buffer_get_int_ret(u_int *ret, Buffer *buffer)
+buffer_get_int_ret(u_int *v, Buffer *buffer)
{
- u_char buf[4];
+ int ret;
- if (buffer_get_ret(buffer, (char *) buf, 4) == -1)
- return (-1);
- if (ret != NULL)
- *ret = get_u32(buf);
- return (0);
+ if ((ret = sshbuf_get_u32(buffer, v)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
+ return -1;
+ }
+ return 0;
}
u_int
u_int ret;
if (buffer_get_int_ret(&ret, buffer) == -1)
- fatal("buffer_get_int: buffer error");
+ fatal("%s: buffer error", __func__);
return (ret);
}
int
-buffer_get_int64_ret(u_int64_t *ret, Buffer *buffer)
+buffer_get_int64_ret(u_int64_t *v, Buffer *buffer)
{
- u_char buf[8];
+ int ret;
- if (buffer_get_ret(buffer, (char *) buf, 8) == -1)
- return (-1);
- if (ret != NULL)
- *ret = get_u64(buf);
- return (0);
+ if ((ret = sshbuf_get_u64(buffer, v)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
+ return -1;
+ }
+ return 0;
}
u_int64_t
u_int64_t ret;
if (buffer_get_int64_ret(&ret, buffer) == -1)
- fatal("buffer_get_int: buffer error");
+ fatal("%s: buffer error", __func__);
return (ret);
}
-/*
- * Stores integers in the buffer, msb first.
- */
void
buffer_put_short(Buffer *buffer, u_short value)
{
- char buf[2];
+ int ret;
- put_u16(buf, value);
- buffer_append(buffer, buf, 2);
+ if ((ret = sshbuf_put_u16(buffer, value)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
void
buffer_put_int(Buffer *buffer, u_int value)
{
- char buf[4];
+ int ret;
- put_u32(buf, value);
- buffer_append(buffer, buf, 4);
+ if ((ret = sshbuf_put_u32(buffer, value)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
void
buffer_put_int64(Buffer *buffer, u_int64_t value)
{
- char buf[8];
+ int ret;
- put_u64(buf, value);
- buffer_append(buffer, buf, 8);
+ if ((ret = sshbuf_put_u64(buffer, value)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
-/*
- * Returns an arbitrary binary string from the buffer. The string cannot
- * be longer than 256k. The returned value points to memory allocated
- * with xmalloc; it is the responsibility of the calling function to free
- * the data. If length_ptr is non-NULL, the length of the returned data
- * will be stored there. A null character will be automatically appended
- * to the returned string, and is not counted in length.
- */
void *
buffer_get_string_ret(Buffer *buffer, u_int *length_ptr)
{
+ size_t len;
+ int ret;
u_char *value;
- u_int len;
- /* Get the length. */
- if (buffer_get_int_ret(&len, buffer) != 0) {
- error("buffer_get_string_ret: cannot extract length");
- return (NULL);
- }
- if (len > 256 * 1024) {
- error("buffer_get_string_ret: bad string length %u", len);
- return (NULL);
- }
- /* Allocate space for the string. Add one byte for a null character. */
- value = xmalloc(len + 1);
- /* Get the string. */
- if (buffer_get_ret(buffer, value, len) == -1) {
- error("buffer_get_string_ret: buffer_get failed");
- xfree(value);
- return (NULL);
+ if ((ret = sshbuf_get_string(buffer, &value, &len)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
+ return NULL;
}
- /* Append a null character to make processing easier. */
- value[len] = '\0';
- /* Optionally return the length of the string. */
- if (length_ptr)
- *length_ptr = len;
- return (value);
+ if (length_ptr != NULL)
+ *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */
+ return value;
}
void *
void *ret;
if ((ret = buffer_get_string_ret(buffer, length_ptr)) == NULL)
- fatal("buffer_get_string: buffer error");
+ fatal("%s: buffer error", __func__);
return (ret);
}
char *
buffer_get_cstring_ret(Buffer *buffer, u_int *length_ptr)
{
- u_int length;
- char *cp, *ret = buffer_get_string_ret(buffer, &length);
+ size_t len;
+ int ret;
+ char *value;
- if (ret == NULL)
+ if ((ret = sshbuf_get_cstring(buffer, &value, &len)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
return NULL;
- if ((cp = memchr(ret, '\0', length)) != NULL) {
- /* XXX allow \0 at end-of-string for a while, remove later */
- if (cp == ret + length - 1)
- error("buffer_get_cstring_ret: string contains \\0");
- else {
- bzero(ret, length);
- xfree(ret);
- return NULL;
- }
}
if (length_ptr != NULL)
- *length_ptr = length;
- return ret;
+ *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */
+ return value;
}
char *
char *ret;
if ((ret = buffer_get_cstring_ret(buffer, length_ptr)) == NULL)
- fatal("buffer_get_cstring: buffer error");
+ fatal("%s: buffer error", __func__);
return ret;
}
-void *
+const void *
buffer_get_string_ptr_ret(Buffer *buffer, u_int *length_ptr)
{
- void *ptr;
- u_int len;
+ size_t len;
+ int ret;
+ const u_char *value;
- if (buffer_get_int_ret(&len, buffer) != 0)
- return NULL;
- if (len > 256 * 1024) {
- error("buffer_get_string_ptr: bad string length %u", len);
+ if ((ret = sshbuf_get_string_direct(buffer, &value, &len)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
return NULL;
}
- ptr = buffer_ptr(buffer);
- buffer_consume(buffer, len);
- if (length_ptr)
- *length_ptr = len;
- return (ptr);
+ if (length_ptr != NULL)
+ *length_ptr = len; /* Safe: sshbuf never stores len > 2^31 */
+ return value;
}
-void *
+const void *
buffer_get_string_ptr(Buffer *buffer, u_int *length_ptr)
{
- void *ret;
+ const void *ret;
if ((ret = buffer_get_string_ptr_ret(buffer, length_ptr)) == NULL)
- fatal("buffer_get_string_ptr: buffer error");
+ fatal("%s: buffer error", __func__);
return (ret);
}
-/*
- * Stores and arbitrary binary string in the buffer.
- */
void
buffer_put_string(Buffer *buffer, const void *buf, u_int len)
{
- buffer_put_int(buffer, len);
- buffer_append(buffer, buf, len);
+ int ret;
+
+ if ((ret = sshbuf_put_string(buffer, buf, len)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
+
void
buffer_put_cstring(Buffer *buffer, const char *s)
{
- if (s == NULL)
- fatal("buffer_put_cstring: s == NULL");
- buffer_put_string(buffer, s, strlen(s));
+ int ret;
+
+ if ((ret = sshbuf_put_cstring(buffer, s)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
-/*
- * Returns a character from the buffer (0 - 255).
- */
int
-buffer_get_char_ret(char *ret, Buffer *buffer)
+buffer_get_char_ret(char *v, Buffer *buffer)
{
- if (buffer_get_ret(buffer, ret, 1) == -1) {
- error("buffer_get_char_ret: buffer_get_ret failed");
- return (-1);
+ int ret;
+
+ if ((ret = sshbuf_get_u8(buffer, (u_char *)v)) != 0) {
+ error("%s: %s", __func__, ssh_err(ret));
+ return -1;
}
- return (0);
+ return 0;
}
int
char ch;
if (buffer_get_char_ret(&ch, buffer) == -1)
- fatal("buffer_get_char: buffer error");
+ fatal("%s: buffer error", __func__);
return (u_char) ch;
}
-/*
- * Stores a character in the buffer.
- */
void
buffer_put_char(Buffer *buffer, int value)
{
- char ch = value;
+ int ret;
+
+ if ((ret = sshbuf_put_u8(buffer, value)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
+}
+
+void
+buffer_put_bignum2_from_string(Buffer *buffer, const u_char *s, u_int l)
+{
+ int ret;
- buffer_append(buffer, &ch, 1);
+ if ((ret = sshbuf_put_bignum2_bytes(buffer, s, l)) != 0)
+ fatal("%s: %s", __func__, ssh_err(ret));
}
+
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