1 /********************************************************************** 2 Copyright(c) 2011-2017 Intel Corporation All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions 6 are met: 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above copyright 10 notice, this list of conditions and the following disclaimer in 11 the documentation and/or other materials provided with the 12 distribution. 13 * Neither the name of Intel Corporation nor the names of its 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 **********************************************************************/ 29 30 #include <stdlib.h> 31 #include <string.h> 32 #include "rolling_hashx.h" 33 #include "rolling_hash2_table.h" 34 #include "isal_crypto_api.h" 35 36 extern uint64_t 37 rolling_hash2_run_until(uint32_t *idx, int max_idx, uint64_t *t1, uint64_t *t2, uint8_t *b1, 38 uint8_t *b2, uint64_t h, uint64_t mask, uint64_t trigger); 39 40 int 41 rolling_hash2_init(struct rh_state2 *state, uint32_t w) 42 { 43 uint32_t i; 44 uint64_t v; 45 46 if (w > FINGERPRINT_MAX_WINDOW) 47 return -1; 48 49 for (i = 0; i < 256; i++) { 50 v = rolling_hash2_table1[i]; 51 state->table1[i] = v; 52 state->table2[i] = (v << w) | (v >> (64 - w)); 53 } 54 state->w = w; 55 return 0; 56 } 57 58 void 59 rolling_hash2_reset(struct rh_state2 *state, uint8_t *init_bytes) 60 { 61 uint64_t hash; 62 uint32_t i, w; 63 64 hash = 0; 65 w = state->w; 66 for (i = 0; i < w; i++) { 67 hash = (hash << 1) | (hash >> (64 - 1)); 68 hash ^= state->table1[init_bytes[i]]; 69 } 70 state->hash = hash; 71 memcpy(state->history, init_bytes, w); 72 } 73 74 static uint64_t 75 hash_fn(struct rh_state2 *state, uint64_t h, uint8_t new_char, uint8_t old_char) 76 { 77 h = (h << 1) | (h >> (64 - 1)); 78 h ^= state->table1[new_char] ^ state->table2[old_char]; 79 return h; 80 } 81 82 uint64_t 83 rolling_hash2_run_until_base(uint32_t *idx, int max_idx, uint64_t *t1, uint64_t *t2, uint8_t *b1, 84 uint8_t *b2, uint64_t h, uint64_t mask, uint64_t trigger) 85 { 86 int i = *idx; 87 88 if (trigger == 0) { 89 for (; i < max_idx; i++) { 90 h = (h << 1) | (h >> (64 - 1)); 91 h ^= t1[b1[i]] ^ t2[b2[i]]; 92 if ((h & mask) == 0) { 93 *idx = i; 94 return h; 95 } 96 } 97 } else { 98 for (; i < max_idx; i++) { 99 h = (h << 1) | (h >> (64 - 1)); 100 h ^= t1[b1[i]] ^ t2[b2[i]]; 101 if ((h & mask) == trigger) { 102 *idx = i; 103 return h; 104 } 105 } 106 } 107 *idx = i; 108 return h; 109 } 110 111 int 112 rolling_hash2_run(struct rh_state2 *state, uint8_t *buffer, uint32_t buffer_length, uint32_t mask, 113 uint32_t trigger, uint32_t *offset) 114 { 115 116 uint32_t i; 117 uint32_t w = state->w; 118 uint64_t hash = state->hash; 119 120 for (i = 0; i < w; i++) { 121 if (i == buffer_length) { 122 *offset = i; 123 // update history 124 memmove(state->history, state->history + i, w - i); 125 memcpy(state->history + w - i, buffer, i); 126 state->hash = hash; 127 return FINGERPRINT_RET_MAX; 128 } 129 hash = hash_fn(state, hash, buffer[i], state->history[i]); 130 131 if ((hash & mask) == trigger) { 132 // found hit 133 i++; 134 *offset = i; 135 memmove(state->history, state->history + i, w - i); 136 memcpy(state->history + w - i, buffer, i); 137 state->hash = hash; 138 return FINGERPRINT_RET_HIT; 139 } 140 } 141 142 hash = rolling_hash2_run_until(&i, buffer_length, state->table1, state->table2, buffer, 143 buffer - w, hash, mask, trigger); 144 if ((hash & mask) == trigger) { 145 // found hit 146 i++; 147 *offset = i; 148 memcpy(state->history, buffer + i - w, w); 149 state->hash = hash; 150 return FINGERPRINT_RET_HIT; 151 } 152 // no hit 153 *offset = i; 154 memcpy(state->history, buffer + i - w, w); 155 state->hash = hash; 156 return FINGERPRINT_RET_MAX; 157 } 158 159 int 160 isal_rolling_hash2_init(struct rh_state2 *state, const uint32_t w) 161 { 162 #ifdef SAFE_PARAM 163 if (state == NULL) 164 return ISAL_CRYPTO_ERR_NULL_CTX; 165 #endif 166 if (rolling_hash2_init(state, w) < 0) 167 return ISAL_CRYPTO_ERR_WINDOW_SIZE; 168 169 return 0; 170 } 171 172 int 173 isal_rolling_hash2_reset(struct rh_state2 *state, const uint8_t *init_bytes) 174 { 175 #ifdef SAFE_PARAM 176 if (state == NULL) 177 return ISAL_CRYPTO_ERR_NULL_CTX; 178 if (init_bytes == NULL) 179 return ISAL_CRYPTO_ERR_HASH_INIT_VAL; 180 #endif 181 rolling_hash2_reset(state, (uint8_t *) init_bytes); 182 183 return 0; 184 } 185 186 int 187 isal_rolling_hash2_run(struct rh_state2 *state, const uint8_t *buffer, const uint32_t max_len, 188 const uint32_t mask, const uint32_t trigger, uint32_t *offset, int *match) 189 { 190 #ifdef SAFE_PARAM 191 if (state == NULL) 192 return ISAL_CRYPTO_ERR_NULL_CTX; 193 if (buffer == NULL) 194 return ISAL_CRYPTO_ERR_NULL_SRC; 195 if (offset == NULL) 196 return ISAL_CRYPTO_ERR_NULL_OFFSET; 197 if (match == NULL) 198 return ISAL_CRYPTO_ERR_NULL_MATCH; 199 #endif 200 *match = rolling_hash2_run(state, (uint8_t *) buffer, max_len, mask, trigger, offset); 201 202 return 0; 203 } 204 205 int 206 isal_rolling_hashx_mask_gen(const uint32_t mean, const uint32_t shift, uint32_t *mask) 207 { 208 #ifdef SAFE_PARAM 209 if (mask == NULL) 210 return ISAL_CRYPTO_ERR_NULL_MASK; 211 #endif 212 *mask = rolling_hashx_mask_gen((long) mean, (int) shift); 213 214 return 0; 215 } 216 217 struct slver { 218 uint16_t snum; 219 uint8_t ver; 220 uint8_t core; 221 }; 222 struct slver rolling_hash2_init_slver_00000264; 223 struct slver rolling_hash2_init_slver = { 0x0264, 0x00, 0x00 }; 224 225 struct slver rolling_hash2_reset_slver_00000265; 226 struct slver rolling_hash2_reset_slver = { 0x0265, 0x00, 0x00 }; 227 228 struct slver rolling_hash2_run_slver_00000266; 229 struct slver rolling_hash2_run_slver = { 0x0266, 0x00, 0x00 }; 230