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Annotation of embedaddon/strongswan/src/libstrongswan/plugins/wolfssl/wolfssl_hasher.c, revision 1.1

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: }