100 lines
3.8 KiB
C
100 lines
3.8 KiB
C
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/*
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* Copyright (c) 2007, Cameron Rich
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of the axTLS project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BIGINT_HEADER
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#define BIGINT_HEADER
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#include "crypto.h"
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BI_CTX *bi_initialize(void);
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void bi_terminate(BI_CTX *ctx);
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void bi_permanent(bigint *bi);
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void bi_depermanent(bigint *bi);
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void bi_clear_cache(BI_CTX *ctx);
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void bi_free(BI_CTX *ctx, bigint *bi);
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bigint *bi_copy(bigint *bi);
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bigint *bi_clone(BI_CTX *ctx, const bigint *bi);
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void bi_export(BI_CTX *ctx, bigint *bi, uint8_t *data, int size);
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bigint *bi_import(BI_CTX *ctx, const uint8_t *data, int len);
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bigint *int_to_bi(BI_CTX *ctx, comp i);
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/* the functions that actually do something interesting */
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bigint *bi_add(BI_CTX *ctx, bigint *bia, bigint *bib);
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bigint *bi_subtract(BI_CTX *ctx, bigint *bia,
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bigint *bib, int *is_negative);
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bigint *bi_divide(BI_CTX *ctx, bigint *bia, bigint *bim, int is_mod);
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bigint *bi_multiply(BI_CTX *ctx, bigint *bia, bigint *bib);
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bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp);
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bigint *bi_mod_power2(BI_CTX *ctx, bigint *bi, bigint *bim, bigint *biexp);
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int bi_compare(bigint *bia, bigint *bib);
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void bi_set_mod(BI_CTX *ctx, bigint *bim, int mod_offset);
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void bi_free_mod(BI_CTX *ctx, int mod_offset);
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#ifdef CONFIG_SSL_FULL_MODE
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void bi_print(const char *label, bigint *bi);
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bigint *bi_str_import(BI_CTX *ctx, const char *data);
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#endif
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/**
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* @def bi_mod
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* Find the residue of B. bi_set_mod() must be called before hand.
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*/
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#define bi_mod(A, B) bi_divide(A, B, ctx->bi_mod[ctx->mod_offset], 1)
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/**
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* bi_residue() is technically the same as bi_mod(), but it uses the
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* appropriate reduction technique (which is bi_mod() when doing classical
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* reduction).
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*/
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#if defined(CONFIG_BIGINT_MONTGOMERY)
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#define bi_residue(A, B) bi_mont(A, B)
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bigint *bi_mont(BI_CTX *ctx, bigint *bixy);
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#elif defined(CONFIG_BIGINT_BARRETT)
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#define bi_residue(A, B) bi_barrett(A, B)
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bigint *bi_barrett(BI_CTX *ctx, bigint *bi);
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#else /* if defined(CONFIG_BIGINT_CLASSICAL) */
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#define bi_residue(A, B) bi_mod(A, B)
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#endif
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#ifdef CONFIG_BIGINT_SQUARE
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bigint *bi_square(BI_CTX *ctx, bigint *bi);
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#else
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#define bi_square(A, B) bi_multiply(A, bi_copy(B), B)
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#endif
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#ifdef CONFIG_BIGINT_CRT
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bigint *bi_crt(BI_CTX *ctx, bigint *bi,
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bigint *dP, bigint *dQ,
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bigint *p, bigint *q,
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bigint *qInv);
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#endif
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#endif
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