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comparison: netwerk/srtp/src/crypto/include/crypto_math.h
netwerk/srtp/src/crypto/include/crypto_math.h
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| 1 /* | |
| 2 * math.h | |
| 3 * | |
| 4 * crypto math operations and data types | |
| 5 * | |
| 6 * David A. McGrew | |
| 7 * Cisco Systems, Inc. | |
| 8 */ | |
| 9 /* | |
| 10 * | |
| 11 * Copyright (c) 2001-2006 Cisco Systems, Inc. | |
| 12 * All rights reserved. | |
| 13 * | |
| 14 * Redistribution and use in source and binary forms, with or without | |
| 15 * modification, are permitted provided that the following conditions | |
| 16 * are met: | |
| 17 * | |
| 18 * Redistributions of source code must retain the above copyright | |
| 19 * notice, this list of conditions and the following disclaimer. | |
| 20 * | |
| 21 * Redistributions in binary form must reproduce the above | |
| 22 * copyright notice, this list of conditions and the following | |
| 23 * disclaimer in the documentation and/or other materials provided | |
| 24 * with the distribution. | |
| 25 * | |
| 26 * Neither the name of the Cisco Systems, Inc. nor the names of its | |
| 27 * contributors may be used to endorse or promote products derived | |
| 28 * from this software without specific prior written permission. | |
| 29 * | |
| 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
| 35 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 36 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 37 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 41 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 42 * | |
| 43 */ | |
| 44 | |
| 45 #ifndef MATH_H | |
| 46 #define MATH_H | |
| 47 | |
| 48 #include "datatypes.h" | |
| 49 | |
| 50 unsigned char | |
| 51 v32_weight(v32_t a); | |
| 52 | |
| 53 unsigned char | |
| 54 v32_distance(v32_t x, v32_t y); | |
| 55 | |
| 56 unsigned int | |
| 57 v32_dot_product(v32_t a, v32_t b); | |
| 58 | |
| 59 char * | |
| 60 v16_bit_string(v16_t x); | |
| 61 | |
| 62 char * | |
| 63 v32_bit_string(v32_t x); | |
| 64 | |
| 65 char * | |
| 66 v64_bit_string(const v64_t *x); | |
| 67 | |
| 68 char * | |
| 69 octet_hex_string(uint8_t x); | |
| 70 | |
| 71 char * | |
| 72 v16_hex_string(v16_t x); | |
| 73 | |
| 74 char * | |
| 75 v32_hex_string(v32_t x); | |
| 76 | |
| 77 char * | |
| 78 v64_hex_string(const v64_t *x); | |
| 79 | |
| 80 int | |
| 81 hex_char_to_nibble(uint8_t c); | |
| 82 | |
| 83 int | |
| 84 is_hex_string(char *s); | |
| 85 | |
| 86 v16_t | |
| 87 hex_string_to_v16(char *s); | |
| 88 | |
| 89 v32_t | |
| 90 hex_string_to_v32(char *s); | |
| 91 | |
| 92 v64_t | |
| 93 hex_string_to_v64(char *s); | |
| 94 | |
| 95 /* the matrix A[] is stored in column format, i.e., A[i] is | |
| 96 the ith column of the matrix */ | |
| 97 | |
| 98 uint8_t | |
| 99 A_times_x_plus_b(uint8_t A[8], uint8_t x, uint8_t b); | |
| 100 | |
| 101 void | |
| 102 v16_copy_octet_string(v16_t *x, const uint8_t s[2]); | |
| 103 | |
| 104 void | |
| 105 v32_copy_octet_string(v32_t *x, const uint8_t s[4]); | |
| 106 | |
| 107 void | |
| 108 v64_copy_octet_string(v64_t *x, const uint8_t s[8]); | |
| 109 | |
| 110 void | |
| 111 v128_add(v128_t *z, v128_t *x, v128_t *y); | |
| 112 | |
| 113 int | |
| 114 octet_string_is_eq(uint8_t *a, uint8_t *b, int len); | |
| 115 | |
| 116 void | |
| 117 octet_string_set_to_zero(uint8_t *s, int len); | |
| 118 | |
| 119 | |
| 120 | |
| 121 /* | |
| 122 * the matrix A[] is stored in column format, i.e., A[i] is the ith | |
| 123 * column of the matrix | |
| 124 */ | |
| 125 uint8_t | |
| 126 A_times_x_plus_b(uint8_t A[8], uint8_t x, uint8_t b); | |
| 127 | |
| 128 | |
| 129 #if 0 | |
| 130 #if WORDS_BIGENDIAN | |
| 131 | |
| 132 #define _v128_add(z, x, y) { \ | |
| 133 uint64_t tmp; \ | |
| 134 \ | |
| 135 tmp = x->v32[3] + y->v32[3]; \ | |
| 136 z->v32[3] = (uint32_t) tmp; \ | |
| 137 \ | |
| 138 tmp = x->v32[2] + y->v32[2] + (tmp >> 32); \ | |
| 139 z->v32[2] = (uint32_t) tmp; \ | |
| 140 \ | |
| 141 tmp = x->v32[1] + y->v32[1] + (tmp >> 32); \ | |
| 142 z->v32[1] = (uint32_t) tmp; \ | |
| 143 \ | |
| 144 tmp = x->v32[0] + y->v32[0] + (tmp >> 32); \ | |
| 145 z->v32[0] = (uint32_t) tmp; \ | |
| 146 } | |
| 147 | |
| 148 #else /* assume little endian architecture */ | |
| 149 | |
| 150 #define _v128_add(z, x, y) { \ | |
| 151 uint64_t tmp; \ | |
| 152 \ | |
| 153 tmp = htonl(x->v32[3]) + htonl(y->v32[3]); \ | |
| 154 z->v32[3] = ntohl((uint32_t) tmp); \ | |
| 155 \ | |
| 156 tmp = htonl(x->v32[2]) + htonl(y->v32[2]) \ | |
| 157 + htonl(tmp >> 32); \ | |
| 158 z->v32[2] = ntohl((uint32_t) tmp); \ | |
| 159 \ | |
| 160 tmp = htonl(x->v32[1]) + htonl(y->v32[1]) \ | |
| 161 + htonl(tmp >> 32); \ | |
| 162 z->v32[1] = ntohl((uint32_t) tmp); \ | |
| 163 \ | |
| 164 tmp = htonl(x->v32[0]) + htonl(y->v32[0]) \ | |
| 165 + htonl(tmp >> 32); \ | |
| 166 z->v32[0] = ntohl((uint32_t) tmp); \ | |
| 167 } | |
| 168 | |
| 169 #endif /* WORDS_BIGENDIAN */ | |
| 170 #endif | |
| 171 | |
| 172 #ifdef DATATYPES_USE_MACROS /* little functions are really macros */ | |
| 173 | |
| 174 #define v128_set_to_zero(z) _v128_set_to_zero(z) | |
| 175 #define v128_copy(z, x) _v128_copy(z, x) | |
| 176 #define v128_xor(z, x, y) _v128_xor(z, x, y) | |
| 177 #define v128_and(z, x, y) _v128_and(z, x, y) | |
| 178 #define v128_or(z, x, y) _v128_or(z, x, y) | |
| 179 #define v128_complement(x) _v128_complement(x) | |
| 180 #define v128_is_eq(x, y) _v128_is_eq(x, y) | |
| 181 #define v128_xor_eq(x, y) _v128_xor_eq(x, y) | |
| 182 #define v128_get_bit(x, i) _v128_get_bit(x, i) | |
| 183 #define v128_set_bit(x, i) _v128_set_bit(x, i) | |
| 184 #define v128_clear_bit(x, i) _v128_clear_bit(x, i) | |
| 185 #define v128_set_bit_to(x, i, y) _v128_set_bit_to(x, i, y) | |
| 186 | |
| 187 #else | |
| 188 | |
| 189 void | |
| 190 v128_set_to_zero(v128_t *x); | |
| 191 | |
| 192 int | |
| 193 v128_is_eq(const v128_t *x, const v128_t *y); | |
| 194 | |
| 195 void | |
| 196 v128_copy(v128_t *x, const v128_t *y); | |
| 197 | |
| 198 void | |
| 199 v128_xor(v128_t *z, v128_t *x, v128_t *y); | |
| 200 | |
| 201 void | |
| 202 v128_and(v128_t *z, v128_t *x, v128_t *y); | |
| 203 | |
| 204 void | |
| 205 v128_or(v128_t *z, v128_t *x, v128_t *y); | |
| 206 | |
| 207 void | |
| 208 v128_complement(v128_t *x); | |
| 209 | |
| 210 int | |
| 211 v128_get_bit(const v128_t *x, int i); | |
| 212 | |
| 213 void | |
| 214 v128_set_bit(v128_t *x, int i) ; | |
| 215 | |
| 216 void | |
| 217 v128_clear_bit(v128_t *x, int i); | |
| 218 | |
| 219 void | |
| 220 v128_set_bit_to(v128_t *x, int i, int y); | |
| 221 | |
| 222 #endif /* DATATYPES_USE_MACROS */ | |
| 223 | |
| 224 /* | |
| 225 * octet_string_is_eq(a,b, len) returns 1 if the length len strings a | |
| 226 * and b are not equal, returns 0 otherwise | |
| 227 */ | |
| 228 | |
| 229 int | |
| 230 octet_string_is_eq(uint8_t *a, uint8_t *b, int len); | |
| 231 | |
| 232 void | |
| 233 octet_string_set_to_zero(uint8_t *s, int len); | |
| 234 | |
| 235 | |
| 236 #endif /* MATH_H */ | |
| 237 | |
| 238 | |
| 239 |
