Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 1 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 4 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 5 | * Auxiliary functions for storing and retrieving various data types to/from |
| 6 | * Buffers. |
| 7 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 8 | * As far as I am concerned, the code I have written for this software |
| 9 | * can be used freely for any purpose. Any derived versions of this |
| 10 | * software must be clearly marked as such, and if the derived work is |
| 11 | * incompatible with the protocol description in the RFC file, it must be |
| 12 | * called by a name other than "ssh" or "Secure Shell". |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 13 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 14 | * |
| 15 | * SSH2 packet format added by Markus Friedl |
| 16 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without |
| 19 | * modification, are permitted provided that the following conditions |
| 20 | * are met: |
| 21 | * 1. Redistributions of source code must retain the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer. |
| 23 | * 2. Redistributions in binary form must reproduce the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer in the |
| 25 | * documentation and/or other materials provided with the distribution. |
| 26 | * |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 28 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 29 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 30 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 31 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 32 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 33 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 34 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 36 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 37 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 38 | |
| 39 | #include "includes.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 40 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 41 | #include <openssl/bn.h> |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 42 | #include "bufaux.h" |
| 43 | #include "xmalloc.h" |
| 44 | #include "getput.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 45 | #include "log.h" |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 46 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 47 | /* |
| 48 | * Stores an BIGNUM in the buffer with a 2-byte msb first bit count, followed |
| 49 | * by (bits+7)/8 bytes of binary data, msb first. |
| 50 | */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 51 | int |
| 52 | buffer_put_bignum_ret(Buffer *buffer, const BIGNUM *value) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 53 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 54 | int bits = BN_num_bits(value); |
| 55 | int bin_size = (bits + 7) / 8; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 56 | u_char *buf = xmalloc(bin_size); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 57 | int oi; |
| 58 | char msg[2]; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 59 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 60 | /* Get the value of in binary */ |
| 61 | oi = BN_bn2bin(value, buf); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 62 | if (oi != bin_size) { |
| 63 | error("buffer_put_bignum_ret: BN_bn2bin() failed: oi %d != bin_size %d", |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 64 | oi, bin_size); |
Damien Miller | 5fd8b02 | 2005-11-05 16:04:36 +1100 | [diff] [blame] | 65 | xfree(buf); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 66 | return (-1); |
| 67 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 68 | |
| 69 | /* Store the number of bits in the buffer in two bytes, msb first. */ |
| 70 | PUT_16BIT(msg, bits); |
| 71 | buffer_append(buffer, msg, 2); |
| 72 | /* Store the binary data. */ |
Damien Miller | 7684ee1 | 2000-03-17 23:40:15 +1100 | [diff] [blame] | 73 | buffer_append(buffer, (char *)buf, oi); |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 74 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 75 | memset(buf, 0, bin_size); |
| 76 | xfree(buf); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 77 | |
| 78 | return (0); |
| 79 | } |
| 80 | |
| 81 | void |
| 82 | buffer_put_bignum(Buffer *buffer, const BIGNUM *value) |
| 83 | { |
| 84 | if (buffer_put_bignum_ret(buffer, value) == -1) |
| 85 | fatal("buffer_put_bignum: buffer error"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 86 | } |
| 87 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 88 | /* |
| 89 | * Retrieves an BIGNUM from the buffer. |
| 90 | */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 91 | int |
| 92 | buffer_get_bignum_ret(Buffer *buffer, BIGNUM *value) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 93 | { |
Darren Tucker | c0815c9 | 2003-09-22 21:05:50 +1000 | [diff] [blame] | 94 | u_int bits, bytes; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 95 | u_char buf[2], *bin; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 96 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 97 | /* Get the number for bits. */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 98 | if (buffer_get_ret(buffer, (char *) buf, 2) == -1) { |
| 99 | error("buffer_get_bignum_ret: invalid length"); |
| 100 | return (-1); |
| 101 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 102 | bits = GET_16BIT(buf); |
| 103 | /* Compute the number of binary bytes that follow. */ |
| 104 | bytes = (bits + 7) / 8; |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 105 | if (bytes > 8 * 1024) { |
| 106 | error("buffer_get_bignum_ret: cannot handle BN of size %d", bytes); |
| 107 | return (-1); |
| 108 | } |
| 109 | if (buffer_len(buffer) < bytes) { |
| 110 | error("buffer_get_bignum_ret: input buffer too small"); |
| 111 | return (-1); |
| 112 | } |
Damien Miller | 4a8ed54 | 2002-01-22 23:33:31 +1100 | [diff] [blame] | 113 | bin = buffer_ptr(buffer); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 114 | BN_bin2bn(bin, bytes, value); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 115 | if (buffer_consume_ret(buffer, bytes) == -1) { |
| 116 | error("buffer_get_bignum_ret: buffer_consume failed"); |
| 117 | return (-1); |
| 118 | } |
| 119 | return (0); |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | buffer_get_bignum(Buffer *buffer, BIGNUM *value) |
| 124 | { |
| 125 | if (buffer_get_bignum_ret(buffer, value) == -1) |
| 126 | fatal("buffer_get_bignum: buffer error"); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 127 | } |
| 128 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 129 | /* |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 130 | * Stores an BIGNUM in the buffer in SSH2 format. |
| 131 | */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 132 | int |
| 133 | buffer_put_bignum2_ret(Buffer *buffer, const BIGNUM *value) |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 134 | { |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 135 | u_int bytes; |
| 136 | u_char *buf; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 137 | int oi; |
Darren Tucker | c0815c9 | 2003-09-22 21:05:50 +1000 | [diff] [blame] | 138 | u_int hasnohigh = 0; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 139 | |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 140 | if (BN_is_zero(value)) { |
| 141 | buffer_put_int(buffer, 0); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 142 | return 0; |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 143 | } |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 144 | if (value->neg) { |
| 145 | error("buffer_put_bignum2_ret: negative numbers not supported"); |
| 146 | return (-1); |
| 147 | } |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 148 | bytes = BN_num_bytes(value) + 1; /* extra padding byte */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 149 | if (bytes < 2) { |
| 150 | error("buffer_put_bignum2_ret: BN too small"); |
| 151 | return (-1); |
| 152 | } |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 153 | buf = xmalloc(bytes); |
Darren Tucker | 56c9598 | 2004-12-11 13:34:56 +1100 | [diff] [blame] | 154 | buf[0] = 0x00; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 155 | /* Get the value of in binary */ |
| 156 | oi = BN_bn2bin(value, buf+1); |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 157 | if (oi < 0 || (u_int)oi != bytes - 1) { |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 158 | error("buffer_put_bignum2_ret: BN_bn2bin() failed: " |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 159 | "oi %d != bin_size %d", oi, bytes); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 160 | xfree(buf); |
| 161 | return (-1); |
| 162 | } |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 163 | hasnohigh = (buf[1] & 0x80) ? 0 : 1; |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 164 | buffer_put_string(buffer, buf+hasnohigh, bytes-hasnohigh); |
| 165 | memset(buf, 0, bytes); |
| 166 | xfree(buf); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 167 | return (0); |
| 168 | } |
| 169 | |
| 170 | void |
| 171 | buffer_put_bignum2(Buffer *buffer, const BIGNUM *value) |
| 172 | { |
| 173 | if (buffer_put_bignum2_ret(buffer, value) == -1) |
| 174 | fatal("buffer_put_bignum2: buffer error"); |
| 175 | } |
| 176 | |
| 177 | int |
| 178 | buffer_get_bignum2_ret(Buffer *buffer, BIGNUM *value) |
| 179 | { |
| 180 | u_int len; |
| 181 | u_char *bin; |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 182 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 183 | if ((bin = buffer_get_string_ret(buffer, &len)) == NULL) { |
| 184 | error("buffer_get_bignum2_ret: invalid bignum"); |
| 185 | return (-1); |
| 186 | } |
| 187 | |
| 188 | if (len > 0 && (bin[0] & 0x80)) { |
| 189 | error("buffer_get_bignum2_ret: negative numbers not supported"); |
Damien Miller | 5fd8b02 | 2005-11-05 16:04:36 +1100 | [diff] [blame] | 190 | xfree(bin); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 191 | return (-1); |
| 192 | } |
| 193 | if (len > 8 * 1024) { |
| 194 | error("buffer_get_bignum2_ret: cannot handle BN of size %d", len); |
Damien Miller | 5fd8b02 | 2005-11-05 16:04:36 +1100 | [diff] [blame] | 195 | xfree(bin); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 196 | return (-1); |
| 197 | } |
| 198 | BN_bin2bn(bin, len, value); |
| 199 | xfree(bin); |
| 200 | return (0); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 201 | } |
| 202 | |
Damien Miller | 76e1e36 | 2002-01-22 23:15:57 +1100 | [diff] [blame] | 203 | void |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 204 | buffer_get_bignum2(Buffer *buffer, BIGNUM *value) |
| 205 | { |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 206 | if (buffer_get_bignum2_ret(buffer, value) == -1) |
| 207 | fatal("buffer_get_bignum2: buffer error"); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 208 | } |
Darren Tucker | 0acc92a | 2004-02-24 09:21:41 +1100 | [diff] [blame] | 209 | |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 210 | /* |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 211 | * Returns integers from the buffer (msb first). |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 212 | */ |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 213 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 214 | int |
| 215 | buffer_get_short_ret(u_short *ret, Buffer *buffer) |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 216 | { |
| 217 | u_char buf[2]; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 218 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 219 | if (buffer_get_ret(buffer, (char *) buf, 2) == -1) |
| 220 | return (-1); |
| 221 | *ret = GET_16BIT(buf); |
| 222 | return (0); |
| 223 | } |
| 224 | |
| 225 | u_short |
| 226 | buffer_get_short(Buffer *buffer) |
| 227 | { |
| 228 | u_short ret; |
| 229 | |
| 230 | if (buffer_get_short_ret(&ret, buffer) == -1) |
| 231 | fatal("buffer_get_short: buffer error"); |
| 232 | |
| 233 | return (ret); |
| 234 | } |
| 235 | |
| 236 | int |
| 237 | buffer_get_int_ret(u_int *ret, Buffer *buffer) |
| 238 | { |
| 239 | u_char buf[4]; |
| 240 | |
| 241 | if (buffer_get_ret(buffer, (char *) buf, 4) == -1) |
| 242 | return (-1); |
| 243 | *ret = GET_32BIT(buf); |
| 244 | return (0); |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 245 | } |
| 246 | |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 247 | u_int |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 248 | buffer_get_int(Buffer *buffer) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 249 | { |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 250 | u_int ret; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 251 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 252 | if (buffer_get_int_ret(&ret, buffer) == -1) |
| 253 | fatal("buffer_get_int: buffer error"); |
| 254 | |
| 255 | return (ret); |
| 256 | } |
| 257 | |
| 258 | int |
| 259 | buffer_get_int64_ret(u_int64_t *ret, Buffer *buffer) |
| 260 | { |
| 261 | u_char buf[8]; |
| 262 | |
| 263 | if (buffer_get_ret(buffer, (char *) buf, 8) == -1) |
| 264 | return (-1); |
| 265 | *ret = GET_64BIT(buf); |
| 266 | return (0); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 267 | } |
| 268 | |
Ben Lindstrom | 2f959b4 | 2001-01-11 06:20:23 +0000 | [diff] [blame] | 269 | u_int64_t |
| 270 | buffer_get_int64(Buffer *buffer) |
| 271 | { |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 272 | u_int64_t ret; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 273 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 274 | if (buffer_get_int64_ret(&ret, buffer) == -1) |
| 275 | fatal("buffer_get_int: buffer error"); |
| 276 | |
| 277 | return (ret); |
Ben Lindstrom | 2f959b4 | 2001-01-11 06:20:23 +0000 | [diff] [blame] | 278 | } |
| 279 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 280 | /* |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 281 | * Stores integers in the buffer, msb first. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 282 | */ |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 283 | void |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 284 | buffer_put_short(Buffer *buffer, u_short value) |
| 285 | { |
| 286 | char buf[2]; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 287 | |
Damien Miller | 3b23566 | 2002-04-23 20:42:36 +1000 | [diff] [blame] | 288 | PUT_16BIT(buf, value); |
| 289 | buffer_append(buffer, buf, 2); |
| 290 | } |
| 291 | |
| 292 | void |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 293 | buffer_put_int(Buffer *buffer, u_int value) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 294 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 295 | char buf[4]; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 296 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 297 | PUT_32BIT(buf, value); |
| 298 | buffer_append(buffer, buf, 4); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 299 | } |
| 300 | |
Ben Lindstrom | 2f959b4 | 2001-01-11 06:20:23 +0000 | [diff] [blame] | 301 | void |
| 302 | buffer_put_int64(Buffer *buffer, u_int64_t value) |
| 303 | { |
| 304 | char buf[8]; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 305 | |
Ben Lindstrom | 2f959b4 | 2001-01-11 06:20:23 +0000 | [diff] [blame] | 306 | PUT_64BIT(buf, value); |
| 307 | buffer_append(buffer, buf, 8); |
| 308 | } |
| 309 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 310 | /* |
| 311 | * Returns an arbitrary binary string from the buffer. The string cannot |
| 312 | * be longer than 256k. The returned value points to memory allocated |
| 313 | * with xmalloc; it is the responsibility of the calling function to free |
| 314 | * the data. If length_ptr is non-NULL, the length of the returned data |
| 315 | * will be stored there. A null character will be automatically appended |
| 316 | * to the returned string, and is not counted in length. |
| 317 | */ |
Damien Miller | 5a6b4fe | 2001-12-21 14:56:54 +1100 | [diff] [blame] | 318 | void * |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 319 | buffer_get_string_ret(Buffer *buffer, u_int *length_ptr) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 320 | { |
Damien Miller | 5a6b4fe | 2001-12-21 14:56:54 +1100 | [diff] [blame] | 321 | u_char *value; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 322 | u_int len; |
| 323 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 324 | /* Get the length. */ |
| 325 | len = buffer_get_int(buffer); |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 326 | if (len > 256 * 1024) { |
| 327 | error("buffer_get_string_ret: bad string length %u", len); |
| 328 | return (NULL); |
| 329 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 330 | /* Allocate space for the string. Add one byte for a null character. */ |
| 331 | value = xmalloc(len + 1); |
| 332 | /* Get the string. */ |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 333 | if (buffer_get_ret(buffer, value, len) == -1) { |
| 334 | error("buffer_get_string_ret: buffer_get failed"); |
| 335 | xfree(value); |
| 336 | return (NULL); |
| 337 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 338 | /* Append a null character to make processing easier. */ |
| 339 | value[len] = 0; |
| 340 | /* Optionally return the length of the string. */ |
| 341 | if (length_ptr) |
| 342 | *length_ptr = len; |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 343 | return (value); |
| 344 | } |
| 345 | |
| 346 | void * |
| 347 | buffer_get_string(Buffer *buffer, u_int *length_ptr) |
| 348 | { |
| 349 | void *ret; |
| 350 | |
| 351 | if ((ret = buffer_get_string_ret(buffer, length_ptr)) == NULL) |
| 352 | fatal("buffer_get_string: buffer error"); |
| 353 | return (ret); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 354 | } |
| 355 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 356 | /* |
| 357 | * Stores and arbitrary binary string in the buffer. |
| 358 | */ |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 359 | void |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 360 | buffer_put_string(Buffer *buffer, const void *buf, u_int len) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 361 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 362 | buffer_put_int(buffer, len); |
| 363 | buffer_append(buffer, buf, len); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 364 | } |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 365 | void |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 366 | buffer_put_cstring(Buffer *buffer, const char *s) |
| 367 | { |
Ben Lindstrom | 88aa1b4 | 2002-03-22 01:47:52 +0000 | [diff] [blame] | 368 | if (s == NULL) |
| 369 | fatal("buffer_put_cstring: s == NULL"); |
Damien Miller | b38eff8 | 2000-04-01 11:09:21 +1000 | [diff] [blame] | 370 | buffer_put_string(buffer, s, strlen(s)); |
| 371 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 372 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 373 | /* |
| 374 | * Returns a character from the buffer (0 - 255). |
| 375 | */ |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 376 | int |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 377 | buffer_get_char_ret(char *ret, Buffer *buffer) |
| 378 | { |
| 379 | if (buffer_get_ret(buffer, ret, 1) == -1) { |
| 380 | error("buffer_get_char_ret: buffer_get_ret failed"); |
| 381 | return (-1); |
| 382 | } |
| 383 | return (0); |
| 384 | } |
| 385 | |
| 386 | int |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 387 | buffer_get_char(Buffer *buffer) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 388 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 389 | char ch; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 390 | |
Darren Tucker | 50dbe83 | 2004-11-05 20:41:24 +1100 | [diff] [blame] | 391 | if (buffer_get_char_ret(&ch, buffer) == -1) |
| 392 | fatal("buffer_get_char: buffer error"); |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 393 | return (u_char) ch; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 394 | } |
| 395 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 396 | /* |
| 397 | * Stores a character in the buffer. |
| 398 | */ |
Damien Miller | 5f05637 | 2000-04-16 12:31:48 +1000 | [diff] [blame] | 399 | void |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 400 | buffer_put_char(Buffer *buffer, int value) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 401 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 402 | char ch = value; |
Ben Lindstrom | e135363 | 2002-06-23 21:29:23 +0000 | [diff] [blame] | 403 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 404 | buffer_append(buffer, &ch, 1); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 405 | } |