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Diffstat (limited to 'crypto/openssh/bufaux.c')
| -rw-r--r-- | crypto/openssh/bufaux.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/crypto/openssh/bufaux.c b/crypto/openssh/bufaux.c deleted file mode 100644 index a3f220f89ebe6..0000000000000 --- a/crypto/openssh/bufaux.c +++ /dev/null @@ -1,229 +0,0 @@ -/* - * 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" -RCSID("$OpenBSD: bufaux.c,v 1.13 2000/09/07 20:27:50 deraadt Exp $"); - -#include "ssh.h" -#include <openssl/bn.h> -#include "bufaux.h" -#include "xmalloc.h" -#include "getput.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. - */ -void -buffer_put_bignum(Buffer *buffer, BIGNUM *value) -{ - int bits = BN_num_bits(value); - int bin_size = (bits + 7) / 8; - char unsigned *buf = xmalloc(bin_size); - int oi; - char msg[2]; - - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf); - if (oi != bin_size) - fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d", - oi, bin_size); - - /* Store the number of bits in the buffer in two bytes, msb first. */ - PUT_16BIT(msg, bits); - buffer_append(buffer, msg, 2); - /* Store the binary data. */ - buffer_append(buffer, (char *)buf, oi); - - memset(buf, 0, bin_size); - xfree(buf); -} - -/* - * Retrieves an BIGNUM from the buffer. - */ -int -buffer_get_bignum(Buffer *buffer, BIGNUM *value) -{ - int bits, bytes; - unsigned char buf[2], *bin; - - /* Get the number for bits. */ - buffer_get(buffer, (char *) buf, 2); - bits = GET_16BIT(buf); - /* Compute the number of binary bytes that follow. */ - bytes = (bits + 7) / 8; - if (buffer_len(buffer) < bytes) - fatal("buffer_get_bignum: input buffer too small"); - bin = (unsigned char*) buffer_ptr(buffer); - BN_bin2bn(bin, bytes, value); - buffer_consume(buffer, bytes); - - return 2 + bytes; -} - -/* - * Stores an BIGNUM in the buffer in SSH2 format. - */ -void -buffer_put_bignum2(Buffer *buffer, BIGNUM *value) -{ - int bytes = BN_num_bytes(value) + 1; - unsigned char *buf = xmalloc(bytes); - int oi; - int hasnohigh = 0; - buf[0] = '\0'; - /* Get the value of in binary */ - oi = BN_bn2bin(value, buf+1); - if (oi != bytes-1) - fatal("buffer_put_bignum: BN_bn2bin() failed: oi %d != bin_size %d", - oi, bytes); - hasnohigh = (buf[1] & 0x80) ? 0 : 1; - if (value->neg) { - /**XXX should be two's-complement */ - int i, carry; - unsigned char *uc = buf; - log("negativ!"); - for(i = bytes-1, carry = 1; i>=0; i--) { - uc[i] ^= 0xff; - if(carry) - carry = !++uc[i]; - } - } - buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh); - memset(buf, 0, bytes); - xfree(buf); -} - -int -buffer_get_bignum2(Buffer *buffer, BIGNUM *value) -{ - /**XXX should be two's-complement */ - int len; - unsigned char *bin = (unsigned char *)buffer_get_string(buffer, (unsigned int *)&len); - BN_bin2bn(bin, len, value); - xfree(bin); - return len; -} - -/* - * Returns an integer from the buffer (4 bytes, msb first). - */ -unsigned int -buffer_get_int(Buffer *buffer) -{ - unsigned char buf[4]; - buffer_get(buffer, (char *) buf, 4); - return GET_32BIT(buf); -} - -/* - * Stores an integer in the buffer in 4 bytes, msb first. - */ -void -buffer_put_int(Buffer *buffer, unsigned int value) -{ - char buf[4]; - PUT_32BIT(buf, value); - buffer_append(buffer, buf, 4); -} - -/* - * 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. - */ -char * -buffer_get_string(Buffer *buffer, unsigned int *length_ptr) -{ - unsigned int len; - char *value; - /* Get the length. */ - len = buffer_get_int(buffer); - if (len > 256 * 1024) - fatal("Received packet with bad string length %d", len); - /* Allocate space for the string. Add one byte for a null character. */ - value = xmalloc(len + 1); - /* Get the string. */ - buffer_get(buffer, value, len); - /* 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; -} - -/* - * Stores and arbitrary binary string in the buffer. - */ -void -buffer_put_string(Buffer *buffer, const void *buf, unsigned int len) -{ - buffer_put_int(buffer, len); - buffer_append(buffer, buf, len); -} -void -buffer_put_cstring(Buffer *buffer, const char *s) -{ - buffer_put_string(buffer, s, strlen(s)); -} - -/* - * Returns a character from the buffer (0 - 255). - */ -int -buffer_get_char(Buffer *buffer) -{ - char ch; - buffer_get(buffer, &ch, 1); - return (unsigned char) ch; -} - -/* - * Stores a character in the buffer. - */ -void -buffer_put_char(Buffer *buffer, int value) -{ - char ch = value; - buffer_append(buffer, &ch, 1); -} |