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- /*
- * Copyright(C) 2006 Cameron Rich
- *
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
- #ifndef BIGINT_HEADER
- #define BIGINT_HEADER
-
- /* enable features based on a 'super-set' capbaility. */
- #if defined(CONFIG_SSL_FULL_MODE)
- #define CONFIG_SSL_ENABLE_CLIENT
- #define CONFIG_SSL_CERT_VERIFICATION
- #elif defined(CONFIG_SSL_ENABLE_CLIENT)
- #define CONFIG_SSL_CERT_VERIFICATION
- #endif
-
- #include "os_port.h"
- #include "bigint_impl.h"
-
- #ifndef CONFIG_BIGINT_CHECK_ON
- #define check(A) /**< disappears in normal production mode */
- #endif
- BI_CTX *bi_initialize(void);
- void bi_terminate(BI_CTX *ctx);
- void bi_permanent(bigint *bi);
- void bi_depermanent(bigint *bi);
- void bi_free(BI_CTX *ctx, bigint *bi);
- bigint *bi_copy(bigint *bi);
- bigint *bi_clone(BI_CTX *ctx, const bigint *bi);
- void bi_export(BI_CTX *ctx, bigint *bi, uint8_t *data, int size);
- bigint *bi_import(BI_CTX *ctx, const uint8_t *data, int len);
- bigint *int_to_bi(BI_CTX *ctx, comp i);
-
- /* the functions that actually do something interesting */
- bigint *bi_add(BI_CTX *ctx, bigint *bia, bigint *bib);
- bigint *bi_subtract(BI_CTX *ctx, bigint *bia,
- bigint *bib, int *is_negative);
- bigint *bi_divide(BI_CTX *ctx, bigint *bia, bigint *bim, int is_mod);
- bigint *bi_multiply(BI_CTX *ctx, bigint *bia, bigint *bib);
- bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp);
- bigint *bi_mod_power2(BI_CTX *ctx, bigint *bi, bigint *bim, bigint *biexp);
- int bi_compare(bigint *bia, bigint *bib);
- void bi_set_mod(BI_CTX *ctx, bigint *bim, int mod_offset);
- void bi_free_mod(BI_CTX *ctx, int mod_offset);
-
- #ifdef CONFIG_SSL_FULL_MODE
- void bi_print(const char *label, bigint *bi);
- bigint *bi_str_import(BI_CTX *ctx, const char *data);
- #endif
-
- /**
- * @def bi_mod
- * Find the residue of B. bi_set_mod() must be called before hand.
- */
- #define bi_mod(A, B) bi_divide(A, B, ctx->bi_mod[ctx->mod_offset], 1)
-
- /**
- * bi_residue() is technically the same as bi_mod(), but it uses the
- * appropriate reduction technique (which is bi_mod() when doing classical
- * reduction).
- */
- #if defined(CONFIG_BIGINT_MONTGOMERY)
- #define bi_residue(A, B) bi_mont(A, B)
- bigint *bi_mont(BI_CTX *ctx, bigint *bixy);
- #elif defined(CONFIG_BIGINT_BARRETT)
- #define bi_residue(A, B) bi_barrett(A, B)
- bigint *bi_barrett(BI_CTX *ctx, bigint *bi);
- #else /* if defined(CONFIG_BIGINT_CLASSICAL) */
- #define bi_residue(A, B) bi_mod(A, B)
- #endif
-
- #ifdef CONFIG_BIGINT_SQUARE
- bigint *bi_square(BI_CTX *ctx, bigint *bi);
- #else
- #define bi_square(A, B) bi_multiply(A, bi_copy(B), B)
- #endif
-
- #endif
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