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Annotation of embedaddon/axTLS/crypto/bigint.h, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2007, Cameron Rich
        !             3:  * 
        !             4:  * All rights reserved.
        !             5:  * 
        !             6:  * Redistribution and use in source and binary forms, with or without 
        !             7:  * modification, are permitted provided that the following conditions are met:
        !             8:  *
        !             9:  * * Redistributions of source code must retain the above copyright notice, 
        !            10:  *   this list of conditions and the following disclaimer.
        !            11:  * * Redistributions in binary form must reproduce the above copyright notice, 
        !            12:  *   this list of conditions and the following disclaimer in the documentation 
        !            13:  *   and/or other materials provided with the distribution.
        !            14:  * * Neither the name of the axTLS project nor the names of its contributors 
        !            15:  *   may be used to endorse or promote products derived from this software 
        !            16:  *   without specific prior written permission.
        !            17:  *
        !            18:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
        !            19:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
        !            20:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
        !            21:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
        !            22:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
        !            23:  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
        !            24:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
        !            25:  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
        !            26:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
        !            27:  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
        !            28:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            29:  */
        !            30: 
        !            31: #ifndef BIGINT_HEADER
        !            32: #define BIGINT_HEADER
        !            33: 
        !            34: #include "crypto.h"
        !            35: 
        !            36: BI_CTX *bi_initialize(void);
        !            37: void bi_terminate(BI_CTX *ctx);
        !            38: void bi_permanent(bigint *bi);
        !            39: void bi_depermanent(bigint *bi);
        !            40: void bi_clear_cache(BI_CTX *ctx);
        !            41: void bi_free(BI_CTX *ctx, bigint *bi);
        !            42: bigint *bi_copy(bigint *bi);
        !            43: bigint *bi_clone(BI_CTX *ctx, const bigint *bi);
        !            44: void bi_export(BI_CTX *ctx, bigint *bi, uint8_t *data, int size);
        !            45: bigint *bi_import(BI_CTX *ctx, const uint8_t *data, int len);
        !            46: bigint *int_to_bi(BI_CTX *ctx, comp i);
        !            47: 
        !            48: /* the functions that actually do something interesting */
        !            49: bigint *bi_add(BI_CTX *ctx, bigint *bia, bigint *bib);
        !            50: bigint *bi_subtract(BI_CTX *ctx, bigint *bia, 
        !            51:         bigint *bib, int *is_negative);
        !            52: bigint *bi_divide(BI_CTX *ctx, bigint *bia, bigint *bim, int is_mod);
        !            53: bigint *bi_multiply(BI_CTX *ctx, bigint *bia, bigint *bib);
        !            54: bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp);
        !            55: bigint *bi_mod_power2(BI_CTX *ctx, bigint *bi, bigint *bim, bigint *biexp);
        !            56: int bi_compare(bigint *bia, bigint *bib);
        !            57: void bi_set_mod(BI_CTX *ctx, bigint *bim, int mod_offset);
        !            58: void bi_free_mod(BI_CTX *ctx, int mod_offset);
        !            59: 
        !            60: #ifdef CONFIG_SSL_FULL_MODE
        !            61: void bi_print(const char *label, bigint *bi);
        !            62: bigint *bi_str_import(BI_CTX *ctx, const char *data);
        !            63: #endif
        !            64: 
        !            65: /**
        !            66:  * @def bi_mod
        !            67:  * Find the residue of B. bi_set_mod() must be called before hand.
        !            68:  */
        !            69: #define bi_mod(A, B)      bi_divide(A, B, ctx->bi_mod[ctx->mod_offset], 1)
        !            70: 
        !            71: /**
        !            72:  * bi_residue() is technically the same as bi_mod(), but it uses the
        !            73:  * appropriate reduction technique (which is bi_mod() when doing classical
        !            74:  * reduction).
        !            75:  */
        !            76: #if defined(CONFIG_BIGINT_MONTGOMERY)
        !            77: #define bi_residue(A, B)         bi_mont(A, B)
        !            78: bigint *bi_mont(BI_CTX *ctx, bigint *bixy);
        !            79: #elif defined(CONFIG_BIGINT_BARRETT)
        !            80: #define bi_residue(A, B)         bi_barrett(A, B)
        !            81: bigint *bi_barrett(BI_CTX *ctx, bigint *bi);
        !            82: #else /* if defined(CONFIG_BIGINT_CLASSICAL) */
        !            83: #define bi_residue(A, B)         bi_mod(A, B)
        !            84: #endif
        !            85: 
        !            86: #ifdef CONFIG_BIGINT_SQUARE
        !            87: bigint *bi_square(BI_CTX *ctx, bigint *bi);
        !            88: #else
        !            89: #define bi_square(A, B)     bi_multiply(A, bi_copy(B), B)
        !            90: #endif
        !            91: 
        !            92: #ifdef CONFIG_BIGINT_CRT
        !            93: bigint *bi_crt(BI_CTX *ctx, bigint *bi,
        !            94:         bigint *dP, bigint *dQ,
        !            95:         bigint *p, bigint *q,
        !            96:         bigint *qInv);
        !            97: #endif
        !            98: 
        !            99: #endif