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1.1 misho 1: /* 2: * Copyright (C) 2019 Sean Parkinson, wolfSSL Inc. 3: * 4: * Permission is hereby granted, free of charge, to any person obtaining a copy 5: * of this software and associated documentation files (the "Software"), to deal 6: * in the Software without restriction, including without limitation the rights 7: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 8: * copies of the Software, and to permit persons to whom the Software is 9: * furnished to do so, subject to the following conditions: 10: * 11: * The above copyright notice and this permission notice shall be included in 12: * all copies or substantial portions of the Software. 13: * 14: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17: * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 20: * THE SOFTWARE. 21: */ 22: 23: #include "wolfssl_common.h" 24: #include "wolfssl_hasher.h" 25: #include "wolfssl_util.h" 26: 27: #include <wolfssl/wolfcrypt/hash.h> 28: 29: typedef struct private_wolfssl_hasher_t private_wolfssl_hasher_t; 30: 31: /** 32: * Private data of wolfssl_hasher_t 33: */ 34: struct private_wolfssl_hasher_t { 35: 36: /** 37: * Public interface 38: */ 39: wolfssl_hasher_t public; 40: 41: /** 42: * The hasher to use 43: */ 44: wc_HashAlg hasher; 45: 46: /** 47: * The hash algorithm 48: */ 49: enum wc_HashType type; 50: }; 51: 52: METHOD(hasher_t, get_hash_size, size_t, 53: private_wolfssl_hasher_t *this) 54: { 55: return wc_HashGetDigestSize(this->type); 56: } 57: 58: METHOD(hasher_t, reset, bool, 59: private_wolfssl_hasher_t *this) 60: { 61: return wc_HashInit(&this->hasher, this->type) == 0; 62: } 63: 64: METHOD(hasher_t, get_hash, bool, 65: private_wolfssl_hasher_t *this, chunk_t chunk, uint8_t *hash) 66: { 67: int ret; 68: 69: ret = wc_HashUpdate(&this->hasher, this->type, chunk.ptr, chunk.len); 70: if (ret == 0 && hash) 71: { 72: ret = wc_HashFinal(&this->hasher, this->type, hash); 73: if (ret == 0) 74: { 75: return reset(this); 76: } 77: } 78: return ret == 0; 79: } 80: 81: METHOD(hasher_t, allocate_hash, bool, 82: private_wolfssl_hasher_t *this, chunk_t chunk, chunk_t *hash) 83: { 84: if (hash) 85: { 86: *hash = chunk_alloc(get_hash_size(this)); 87: return get_hash(this, chunk, hash->ptr); 88: } 89: return get_hash(this, chunk, NULL); 90: } 91: 92: METHOD(hasher_t, destroy, void, 93: private_wolfssl_hasher_t *this) 94: { 95: wc_HashFree(&this->hasher, this->type); 96: free(this); 97: } 98: 99: /* 100: * Described in header 101: */ 102: wolfssl_hasher_t *wolfssl_hasher_create(hash_algorithm_t algo) 103: { 104: private_wolfssl_hasher_t *this; 105: enum wc_HashType type; 106: 107: if (!wolfssl_hash2type(algo, &type)) 108: { 109: return NULL; 110: } 111: 112: INIT(this, 113: .public = { 114: .hasher = { 115: .get_hash = _get_hash, 116: .allocate_hash = _allocate_hash, 117: .get_hash_size = _get_hash_size, 118: .reset = _reset, 119: .destroy = _destroy, 120: }, 121: }, 122: .type = type, 123: ); 124: 125: /* initialization */ 126: if (!reset(this)) 127: { 128: destroy(this); 129: return NULL; 130: } 131: return &this->public; 132: }