dropbear: common-algo.c annotate

annotate common-algo.c @ 520:5e344cdfbae2

- Use the right variable notation

author	Matt Johnston <matt@ucc.asn.au>
date	Tue, 18 Nov 2008 12:53:02 +0000
parents	0cdbc95bb3d2
children	582cb38e4eb5 e12c9225acbd

rev	line source
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
74 e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	2 * Dropbear SSH
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * Copyright (c) 2002,2003 Matt Johnston
74 e3adf4cf5465 License boilerplate etc, add Mihnea as an author to some of the files Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	5 * Copyright (c) 2004 by Mihnea Stoenescu
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 * Permission is hereby granted, free of charge, to any person obtaining a copy
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * of this software and associated documentation files (the "Software"), to deal
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 * in the Software without restriction, including without limitation the rights
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * copies of the Software, and to permit persons to whom the Software is
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 * furnished to do so, subject to the following conditions:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * The above copyright notice and this permission notice shall be included in
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 * all copies or substantial portions of the Software.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24 * SOFTWARE. */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "algo.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 /* This file (algo.c) organises the ciphers which can be used, and is used to
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 * decide which ciphers/hashes/compression/signing to use during key exchange*/
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	32 static int void_cipher(const unsigned char* in, unsigned char* out,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	33 unsigned long len, void *cipher_state) {
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	34 memcpy(out, in, len);
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	35 return CRYPT_OK;
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	36 }
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	37
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	38 static int void_start(int cipher, const unsigned char *IV,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	39 const unsigned char *key,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	40 int keylen, int num_rounds, void *cipher_state) {
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	41 return CRYPT_OK;
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	42 }
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	43
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 /* Mappings for ciphers, parameters are
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 {&cipher_desc, keysize, blocksize} */
409 0e69e948caba Add comments about requiring keysize <= 2SHA1_HASH_SIZE Matt Johnston <matt@ucc.asn.au>* parents: 255 diff changeset	46 /* NOTE: if keysize > 2*SHA1_HASH_SIZE, code such as hashkeys()
0e69e948caba Add comments about requiring keysize <= 2SHA1_HASH_SIZE Matt Johnston <matt@ucc.asn.au>* parents: 255 diff changeset	47 needs revisiting */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	49 #ifdef DROPBEAR_AES256
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	50 static const struct dropbear_cipher dropbear_aes256 =
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	51 {&aes_desc, 32, 16};
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	52 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	53 #ifdef DROPBEAR_AES128
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	54 static const struct dropbear_cipher dropbear_aes128 =
150 82fcf3185616 Cleaning out various dead wood found with -dead_strip Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	55 {&aes_desc, 16, 16};
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	56 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	57 #ifdef DROPBEAR_BLOWFISH
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	58 static const struct dropbear_cipher dropbear_blowfish =
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	59 {&blowfish_desc, 16, 8};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	60 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	61 #ifdef DROPBEAR_TWOFISH256
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	62 static const struct dropbear_cipher dropbear_twofish256 =
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	63 {&twofish_desc, 32, 16};
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	64 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	65 #ifdef DROPBEAR_TWOFISH128
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	66 static const struct dropbear_cipher dropbear_twofish128 =
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 {&twofish_desc, 16, 16};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	69 #ifdef DROPBEAR_3DES
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	70 static const struct dropbear_cipher dropbear_3des =
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71 {&des3_desc, 24, 8};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	72 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	73
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	74 /* used to indicate no encryption, as defined in rfc2410 */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	75 const struct dropbear_cipher dropbear_nocipher =
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	76 {NULL, 16, 8};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	77
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	78 /* A few void* s are required to silence warnings
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	79 * about the symmetric_CBC vs symmetric_CTR cipher_state pointer */
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	80 const struct dropbear_cipher_mode dropbear_mode_cbc =
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	81 {(void)cbc_start, (void)cbc_encrypt, (void*)cbc_decrypt};
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	82 const struct dropbear_cipher_mode dropbear_mode_none =
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	83 {void_start, void_cipher, void_cipher};
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	84 #ifdef DROPBEAR_ENABLE_CTR_MODE
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	85 /* a wrapper to make ctr_start and cbc_start look the same */
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	86 static int dropbear_big_endian_ctr_start(int cipher,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	87 const unsigned char *IV,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	88 const unsigned char *key, int keylen,
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	89 int num_rounds, symmetric_CTR *ctr) {
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	90 return ctr_start(cipher, IV, key, keylen, num_rounds, CTR_COUNTER_BIG_ENDIAN, ctr);
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	91 }
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	92 const struct dropbear_cipher_mode dropbear_mode_ctr =
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	93 {(void)dropbear_big_endian_ctr_start, (void)ctr_encrypt, (void*)ctr_decrypt};
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	94 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	95
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96 /* Mapping of ssh hashes to libtomcrypt hashes, including keysize etc.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 {&hash_desc, keysize, hashsize} */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 #ifdef DROPBEAR_SHA1_HMAC
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	100 static const struct dropbear_hash dropbear_sha1 =
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 {&sha1_desc, 20, 20};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102 #endif
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	103 #ifdef DROPBEAR_SHA1_96_HMAC
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	104 static const struct dropbear_hash dropbear_sha1_96 =
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	105 {&sha1_desc, 20, 12};
5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	106 #endif
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 #ifdef DROPBEAR_MD5_HMAC
227 ad1b24e39bf3 Make a variables static Matt Johnston <matt@ucc.asn.au> parents: 194 diff changeset	108 static const struct dropbear_hash dropbear_md5 =
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 {&md5_desc, 16, 16};
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 const struct dropbear_hash dropbear_nohash =
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113 {NULL, 16, 0}; /* used initially */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	114
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	115
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	116 /* The following map ssh names to internal values.
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	117 * The ordering here is important for the client - the first mode
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	118 * that is also supported by the server will get used. */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	119
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 algo_type sshciphers[] = {
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	121 #ifdef DROPBEAR_ENABLE_CTR_MODE
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	122 #ifdef DROPBEAR_AES128
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	123 {"aes128-ctr", 0, &dropbear_aes128, 1, &dropbear_mode_ctr},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	124 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	125 #ifdef DROPBEAR_3DES
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	126 {"3des-ctr", 0, &dropbear_3des, 1, &dropbear_mode_ctr},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	127 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	128 #ifdef DROPBEAR_AES256
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	129 {"aes256-ctr", 0, &dropbear_aes256, 1, &dropbear_mode_ctr},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	130 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	131 #endif /* DROPBEAR_ENABLE_CTR_MODE */
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	132
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	133 /* CBC modes are always enabled */
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	134 #ifdef DROPBEAR_AES128
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	135 {"aes128-cbc", 0, &dropbear_aes128, 1, &dropbear_mode_cbc},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	136 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	137 #ifdef DROPBEAR_3DES
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	138 {"3des-cbc", 0, &dropbear_3des, 1, &dropbear_mode_cbc},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	139 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	140 #ifdef DROPBEAR_AES256
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	141 {"aes256-cbc", 0, &dropbear_aes256, 1, &dropbear_mode_cbc},
235 c3dbd3e1a8ce Change the preferred algorithm order Matt Johnston <matt@ucc.asn.au> parents: 234 diff changeset	142 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	143 #ifdef DROPBEAR_TWOFISH256
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	144 {"twofish256-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	145 {"twofish-cbc", 0, &dropbear_twofish256, 1, &dropbear_mode_cbc},
235 c3dbd3e1a8ce Change the preferred algorithm order Matt Johnston <matt@ucc.asn.au> parents: 234 diff changeset	146 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	147 #ifdef DROPBEAR_TWOFISH128
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	148 {"twofish128-cbc", 0, &dropbear_twofish128, 1, &dropbear_mode_cbc},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	150 #ifdef DROPBEAR_BLOWFISH
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	151 {"blowfish-cbc", 0, &dropbear_blowfish, 1, &dropbear_mode_cbc},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	152 #endif
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	153 {NULL, 0, NULL, 0, NULL}
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156 algo_type sshhashes[] = {
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	157 #ifdef DROPBEAR_SHA1_96_HMAC
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	158 {"hmac-sha1-96", 0, &dropbear_sha1_96, 1, NULL},
228 5e4110bb753a - Fixed twofish algorithm naming so it actually works. Matt Johnston <matt@ucc.asn.au> parents: 227 diff changeset	159 #endif
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	160 #ifdef DROPBEAR_SHA1_HMAC
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	161 {"hmac-sha1", 0, &dropbear_sha1, 1, NULL},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	163 #ifdef DROPBEAR_MD5_HMAC
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	164 {"hmac-md5", 0, &dropbear_md5, 1, NULL},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	165 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	166 {NULL, 0, NULL, 0, NULL}
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	168
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	169 algo_type sshcompress[] = {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	170 #ifndef DISABLE_ZLIB
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	171 {"zlib", DROPBEAR_COMP_ZLIB, NULL, 1, NULL},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	172 {"[email protected]", DROPBEAR_COMP_ZLIB_DELAY, NULL, 1, NULL},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	173 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	174 {"none", DROPBEAR_COMP_NONE, NULL, 1, NULL},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	175 {NULL, 0, NULL, 0, NULL}
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	176 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	178 algo_type sshhostkey[] = {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	179 #ifdef DROPBEAR_RSA
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	180 {"ssh-rsa", DROPBEAR_SIGNKEY_RSA, NULL, 1, NULL},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	181 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	182 #ifdef DROPBEAR_DSS
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	183 {"ssh-dss", DROPBEAR_SIGNKEY_DSS, NULL, 1, NULL},
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	184 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	185 {NULL, 0, NULL, 0, NULL}
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	186 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 algo_type sshkex[] = {
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	189 {"diffie-hellman-group1-sha1", DROPBEAR_KEX_DH_GROUP1, NULL, 1, NULL},
43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	190 {NULL, 0, NULL, 0, NULL}
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	192
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	193
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	194 /* Register the compiled in ciphers.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 * This should be run before using any of the ciphers/hashes */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 void crypto_init() {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197
194 e972be139cb5 Switching to libtomcrypt 1.02 Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	198 const struct ltc_cipher_descriptor *regciphers[] = {
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	199 #ifdef DROPBEAR_AES
150 82fcf3185616 Cleaning out various dead wood found with -dead_strip Matt Johnston <matt@ucc.asn.au> parents: 74 diff changeset	200 &aes_desc,
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	202 #ifdef DROPBEAR_BLOWFISH
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	203 &blowfish_desc,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	204 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	205 #ifdef DROPBEAR_TWOFISH
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206 &twofish_desc,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 #endif
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	208 #ifdef DROPBEAR_3DES
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 &des3_desc,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	210 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211 NULL
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213
194 e972be139cb5 Switching to libtomcrypt 1.02 Matt Johnston <matt@ucc.asn.au> parents: 165 diff changeset	214 const struct ltc_hash_descriptor *reghashes[] = {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 /* we need sha1 for hostkey stuff regardless */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216 &sha1_desc,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 #ifdef DROPBEAR_MD5_HMAC
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218 &md5_desc,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 NULL
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 };
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224 for (i = 0; regciphers[i] != NULL; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 if (register_cipher(regciphers[i]) == -1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 dropbear_exit("error registering crypto");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	227 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	228 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230 for (i = 0; reghashes[i] != NULL; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	231 if (register_hash(reghashes[i]) == -1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	232 dropbear_exit("error registering crypto");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	234 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	235 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	236
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	237 /* algolen specifies the length of algo, algos is our local list to match
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	238 * against.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	239 * Returns DROPBEAR_SUCCESS if we have a match for algo, DROPBEAR_FAILURE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	240 * otherwise */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 int have_algo(char* algo, size_t algolen, algo_type algos[]) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	245 for (i = 0; algos[i].name != NULL; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	246 if (strlen(algos[i].name) == algolen
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	247 && (strncmp(algos[i].name, algo, algolen) == 0)) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	248 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	249 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	250 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	251
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	252 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	253 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	254
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	255
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	256
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	257 /* Output a comma separated list of algorithms to a buffer */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	258 void buf_put_algolist(buffer * buf, algo_type localalgos[]) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	259
238 e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	260 unsigned int i, len;
e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	261 unsigned int donefirst = 0;
e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	262 buffer *algolist = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	263
502 43bbe17d6ba0 - Add Counter Mode support Matt Johnston <matt@ucc.asn.au> parents: 501 diff changeset	264 algolist = buf_new(160);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	265 for (i = 0; localalgos[i].name != NULL; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	266 if (localalgos[i].usable) {
238 e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	267 if (donefirst)
e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	268 buf_putbyte(algolist, ',');
e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	269 donefirst = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	270 len = strlen(localalgos[i].name);
238 e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	271 buf_putbytes(algolist, localalgos[i].name, len);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	272 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	273 }
238 e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	274 buf_putstring(buf, algolist->data, algolist->len);
e923801a7678 use a buffer rather than raw char array for creating Matt Johnston <matt@ucc.asn.au> parents: 237 diff changeset	275 buf_free(algolist);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	276 }

Mercurial > dropbear

annotate common-algo.c @ 520:5e344cdfbae2