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authordes <des@FreeBSD.org>2008-07-22 18:58:19 +0000
committerdes <des@FreeBSD.org>2008-07-22 18:58:19 +0000
commit666aa9cc1660793c97ef29a6cb66dfbb894dde8f (patch)
tree209e642fbe2a816041f67bc27c9800879f5541bc /crypto/openssh/bufaux.c
parent624d93001f28e236c027516d88282351eb7bffbe (diff)
downloadFreeBSD-src-666aa9cc1660793c97ef29a6cb66dfbb894dde8f.zip
FreeBSD-src-666aa9cc1660793c97ef29a6cb66dfbb894dde8f.tar.gz
Revert part of 180714 - the intent was to flatten dist, not to nuke it.
Diffstat (limited to 'crypto/openssh/bufaux.c')
-rw-r--r--crypto/openssh/bufaux.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/crypto/openssh/bufaux.c b/crypto/openssh/bufaux.c
new file mode 100644
index 0000000..cbdc22c
--- /dev/null
+++ b/crypto/openssh/bufaux.c
@@ -0,0 +1,249 @@
+/* $OpenBSD: bufaux.c,v 1.44 2006/08/03 03:34:41 deraadt 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.
+ *
+ * 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".
+ *
+ *
+ * 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.
+ */
+
+#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).
+ */
+
+int
+buffer_get_short_ret(u_short *ret, Buffer *buffer)
+{
+ u_char buf[2];
+
+ if (buffer_get_ret(buffer, (char *) buf, 2) == -1)
+ return (-1);
+ *ret = get_u16(buf);
+ return (0);
+}
+
+u_short
+buffer_get_short(Buffer *buffer)
+{
+ u_short ret;
+
+ if (buffer_get_short_ret(&ret, buffer) == -1)
+ fatal("buffer_get_short: buffer error");
+
+ return (ret);
+}
+
+int
+buffer_get_int_ret(u_int *ret, Buffer *buffer)
+{
+ u_char buf[4];
+
+ if (buffer_get_ret(buffer, (char *) buf, 4) == -1)
+ return (-1);
+ *ret = get_u32(buf);
+ return (0);
+}
+
+u_int
+buffer_get_int(Buffer *buffer)
+{
+ u_int ret;
+
+ if (buffer_get_int_ret(&ret, buffer) == -1)
+ fatal("buffer_get_int: buffer error");
+
+ return (ret);
+}
+
+int
+buffer_get_int64_ret(u_int64_t *ret, Buffer *buffer)
+{
+ u_char buf[8];
+
+ if (buffer_get_ret(buffer, (char *) buf, 8) == -1)
+ return (-1);
+ *ret = get_u64(buf);
+ return (0);
+}
+
+u_int64_t
+buffer_get_int64(Buffer *buffer)
+{
+ u_int64_t ret;
+
+ if (buffer_get_int64_ret(&ret, buffer) == -1)
+ fatal("buffer_get_int: buffer error");
+
+ return (ret);
+}
+
+/*
+ * Stores integers in the buffer, msb first.
+ */
+void
+buffer_put_short(Buffer *buffer, u_short value)
+{
+ char buf[2];
+
+ put_u16(buf, value);
+ buffer_append(buffer, buf, 2);
+}
+
+void
+buffer_put_int(Buffer *buffer, u_int value)
+{
+ char buf[4];
+
+ put_u32(buf, value);
+ buffer_append(buffer, buf, 4);
+}
+
+void
+buffer_put_int64(Buffer *buffer, u_int64_t value)
+{
+ char buf[8];
+
+ put_u64(buf, value);
+ buffer_append(buffer, buf, 8);
+}
+
+/*
+ * 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)
+{
+ u_char *value;
+ u_int len;
+
+ /* Get the length. */
+ len = buffer_get_int(buffer);
+ 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);
+ }
+ /* 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);
+}
+
+void *
+buffer_get_string(Buffer *buffer, u_int *length_ptr)
+{
+ void *ret;
+
+ if ((ret = buffer_get_string_ret(buffer, length_ptr)) == NULL)
+ fatal("buffer_get_string: buffer error");
+ 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);
+}
+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));
+}
+
+/*
+ * Returns a character from the buffer (0 - 255).
+ */
+int
+buffer_get_char_ret(char *ret, Buffer *buffer)
+{
+ if (buffer_get_ret(buffer, ret, 1) == -1) {
+ error("buffer_get_char_ret: buffer_get_ret failed");
+ return (-1);
+ }
+ return (0);
+}
+
+int
+buffer_get_char(Buffer *buffer)
+{
+ char ch;
+
+ if (buffer_get_char_ret(&ch, buffer) == -1)
+ fatal("buffer_get_char: buffer error");
+ return (u_char) ch;
+}
+
+/*
+ * Stores a character in the buffer.
+ */
+void
+buffer_put_char(Buffer *buffer, int value)
+{
+ char ch = value;
+
+ buffer_append(buffer, &ch, 1);
+}
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