diff options
Diffstat (limited to 'crypto/openssh/bufbn.c')
| -rw-r--r-- | crypto/openssh/bufbn.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/crypto/openssh/bufbn.c b/crypto/openssh/bufbn.c deleted file mode 100644 index 9706ba8..0000000 --- a/crypto/openssh/bufbn.c +++ /dev/null @@ -1,221 +0,0 @@ -/* $OpenBSD: bufbn.c,v 1.4 2006/11/06 21:25:28 markus 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" - -/* - * Stores an BIGNUM in the buffer with a 2-byte msb first bit count, followed - * by (bits+7)/8 bytes of binary data, msb first. - */ -int -buffer_put_bignum_ret(Buffer *buffer, const BIGNUM *value) -{ - int bits = BN_num_bits(value); - int bin_size = (bits + 7) / 8; - u_char *buf = xmalloc(bin_size); - int oi; - char msg[2]; - - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf); - if (oi != bin_size) { - error("buffer_put_bignum_ret: BN_bn2bin() failed: oi %d != bin_size %d", - oi, bin_size); - xfree(buf); - return (-1); - } - - /* Store the number of bits in the buffer in two bytes, msb first. */ - put_u16(msg, bits); - buffer_append(buffer, msg, 2); - /* Store the binary data. */ - buffer_append(buffer, buf, oi); - - memset(buf, 0, bin_size); - xfree(buf); - - return (0); -} - -void -buffer_put_bignum(Buffer *buffer, const BIGNUM *value) -{ - if (buffer_put_bignum_ret(buffer, value) == -1) - fatal("buffer_put_bignum: buffer error"); -} - -/* - * Retrieves an BIGNUM from the buffer. - */ -int -buffer_get_bignum_ret(Buffer *buffer, BIGNUM *value) -{ - u_int bits, bytes; - u_char buf[2], *bin; - - /* Get the number for bits. */ - if (buffer_get_ret(buffer, (char *) buf, 2) == -1) { - error("buffer_get_bignum_ret: invalid length"); - return (-1); - } - bits = get_u16(buf); - /* Compute the number of binary bytes that follow. */ - bytes = (bits + 7) / 8; - if (bytes > 8 * 1024) { - error("buffer_get_bignum_ret: cannot handle BN of size %d", bytes); - return (-1); - } - if (buffer_len(buffer) < bytes) { - error("buffer_get_bignum_ret: input buffer too small"); - return (-1); - } - bin = buffer_ptr(buffer); - if (BN_bin2bn(bin, bytes, value) == NULL) { - error("buffer_get_bignum_ret: BN_bin2bn failed"); - return (-1); - } - if (buffer_consume_ret(buffer, bytes) == -1) { - error("buffer_get_bignum_ret: buffer_consume failed"); - return (-1); - } - return (0); -} - -void -buffer_get_bignum(Buffer *buffer, BIGNUM *value) -{ - if (buffer_get_bignum_ret(buffer, value) == -1) - fatal("buffer_get_bignum: buffer error"); -} - -/* - * Stores an BIGNUM in the buffer in SSH2 format. - */ -int -buffer_put_bignum2_ret(Buffer *buffer, const BIGNUM *value) -{ - u_int bytes; - u_char *buf; - int oi; - u_int hasnohigh = 0; - - if (BN_is_zero(value)) { - buffer_put_int(buffer, 0); - return 0; - } - if (value->neg) { - error("buffer_put_bignum2_ret: negative numbers not supported"); - return (-1); - } - bytes = BN_num_bytes(value) + 1; /* extra padding byte */ - if (bytes < 2) { - error("buffer_put_bignum2_ret: BN too small"); - return (-1); - } - buf = xmalloc(bytes); - buf[0] = 0x00; - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf+1); - if (oi < 0 || (u_int)oi != bytes - 1) { - error("buffer_put_bignum2_ret: BN_bn2bin() failed: " - "oi %d != bin_size %d", oi, bytes); - xfree(buf); - return (-1); - } - hasnohigh = (buf[1] & 0x80) ? 0 : 1; - buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh); - memset(buf, 0, bytes); - xfree(buf); - return (0); -} - -void -buffer_put_bignum2(Buffer *buffer, const BIGNUM *value) -{ - if (buffer_put_bignum2_ret(buffer, value) == -1) - fatal("buffer_put_bignum2: buffer error"); -} - -int -buffer_get_bignum2_ret(Buffer *buffer, BIGNUM *value) -{ - u_int len; - u_char *bin; - - if ((bin = buffer_get_string_ret(buffer, &len)) == NULL) { - error("buffer_get_bignum2_ret: invalid bignum"); - return (-1); - } - - if (len > 0 && (bin[0] & 0x80)) { - error("buffer_get_bignum2_ret: negative numbers not supported"); - xfree(bin); - return (-1); - } - if (len > 8 * 1024) { - error("buffer_get_bignum2_ret: cannot handle BN of size %d", len); - xfree(bin); - return (-1); - } - if (BN_bin2bn(bin, len, value) == NULL) { - error("buffer_get_bignum2_ret: BN_bin2bn failed"); - return (-1); - } - xfree(bin); - return (0); -} - -void -buffer_get_bignum2(Buffer *buffer, BIGNUM *value) -{ - if (buffer_get_bignum2_ret(buffer, value) == -1) - fatal("buffer_get_bignum2: buffer error"); -} |
