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Annotation of embedaddon/strongswan/src/libstrongswan/plugins/wolfssl/wolfssl_sha1_prf.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: 
        !            25: #ifndef NO_SHA
        !            26: 
        !            27: #include "wolfssl_sha1_prf.h"
        !            28: 
        !            29: #include <wolfssl/wolfcrypt/sha.h>
        !            30: #include <crypto/hashers/hasher.h>
        !            31: 
        !            32: typedef struct private_wolfssl_sha1_prf_t private_wolfssl_sha1_prf_t;
        !            33: 
        !            34: /**
        !            35:  * Private data of an wolfssl_sha1_prf_t object.
        !            36:  */
        !            37: struct private_wolfssl_sha1_prf_t {
        !            38: 
        !            39:        /**
        !            40:         * Public wolfssl_sha1_prf_t interface
        !            41:         */
        !            42:        wolfssl_sha1_prf_t public;
        !            43: 
        !            44:        /**
        !            45:         * SHA1 context
        !            46:         */
        !            47:        wc_Sha sha1;
        !            48: };
        !            49: 
        !            50: METHOD(prf_t, get_bytes, bool,
        !            51:        private_wolfssl_sha1_prf_t *this, chunk_t seed, uint8_t *bytes)
        !            52: {
        !            53:        if (wc_ShaUpdate(&this->sha1, seed.ptr, seed.len) != 0)
        !            54:        {
        !            55:                return FALSE;
        !            56:        }
        !            57: 
        !            58:        if (bytes)
        !            59:        {
        !            60:                uint32_t *hash = (uint32_t*)bytes;
        !            61: 
        !            62:                hash[0] = htonl(this->sha1.digest[0]);
        !            63:                hash[1] = htonl(this->sha1.digest[1]);
        !            64:                hash[2] = htonl(this->sha1.digest[2]);
        !            65:                hash[3] = htonl(this->sha1.digest[3]);
        !            66:                hash[4] = htonl(this->sha1.digest[4]);
        !            67:        }
        !            68:        return TRUE;
        !            69: }
        !            70: 
        !            71: METHOD(prf_t, get_block_size, size_t,
        !            72:        private_wolfssl_sha1_prf_t *this)
        !            73: {
        !            74:        return HASH_SIZE_SHA1;
        !            75: }
        !            76: 
        !            77: METHOD(prf_t, allocate_bytes, bool,
        !            78:        private_wolfssl_sha1_prf_t *this, chunk_t seed, chunk_t *chunk)
        !            79: {
        !            80:        if (chunk)
        !            81:        {
        !            82:                *chunk = chunk_alloc(HASH_SIZE_SHA1);
        !            83:                return get_bytes(this, seed, chunk->ptr);
        !            84:        }
        !            85:        return get_bytes(this, seed, NULL);
        !            86: }
        !            87: 
        !            88: METHOD(prf_t, get_key_size, size_t,
        !            89:        private_wolfssl_sha1_prf_t *this)
        !            90: {
        !            91:        return HASH_SIZE_SHA1;
        !            92: }
        !            93: 
        !            94: METHOD(prf_t, set_key, bool,
        !            95:        private_wolfssl_sha1_prf_t *this, chunk_t key)
        !            96: {
        !            97:        if (wc_InitSha(&this->sha1) != 0)
        !            98:        {
        !            99:                return FALSE;
        !           100:        }
        !           101: 
        !           102:        if (key.len % 4)
        !           103:        {
        !           104:                return FALSE;
        !           105:        }
        !           106:        if (key.len >= 4)
        !           107:        {
        !           108:                this->sha1.digest[0] ^= untoh32(key.ptr);
        !           109:        }
        !           110:        if (key.len >= 8)
        !           111:        {
        !           112:                this->sha1.digest[1] ^= untoh32(key.ptr + 4);
        !           113:        }
        !           114:        if (key.len >= 12)
        !           115:        {
        !           116:                this->sha1.digest[2] ^= untoh32(key.ptr + 8);
        !           117:        }
        !           118:        if (key.len >= 16)
        !           119:        {
        !           120:                this->sha1.digest[3] ^= untoh32(key.ptr + 12);
        !           121:        }
        !           122:        if (key.len >= 20)
        !           123:        {
        !           124:                this->sha1.digest[4] ^= untoh32(key.ptr + 16);
        !           125:        }
        !           126:        return TRUE;
        !           127: }
        !           128: 
        !           129: METHOD(prf_t, destroy, void,
        !           130:        private_wolfssl_sha1_prf_t *this)
        !           131: {
        !           132:        wc_ShaFree(&this->sha1);
        !           133:        free(this);
        !           134: }
        !           135: 
        !           136: /*
        !           137:  * Described in header
        !           138:  */
        !           139: wolfssl_sha1_prf_t *wolfssl_sha1_prf_create(pseudo_random_function_t algo)
        !           140: {
        !           141:        private_wolfssl_sha1_prf_t *this;
        !           142: 
        !           143:        INIT(this,
        !           144:                .public = {
        !           145:                        .prf = {
        !           146:                                .get_block_size = _get_block_size,
        !           147:                                .get_bytes = _get_bytes,
        !           148:                                .allocate_bytes = _allocate_bytes,
        !           149:                                .get_key_size = _get_key_size,
        !           150:                                .set_key = _set_key,
        !           151:                                .destroy = _destroy,
        !           152:                        },
        !           153:                },
        !           154:        );
        !           155: 
        !           156:        if (wc_InitSha(&this->sha1) != 0)
        !           157:        {
        !           158:                free(this);
        !           159:                return NULL;
        !           160:        }
        !           161:        return &this->public;
        !           162: }
        !           163: 
        !           164: #endif /* NO_SHA */