1 /* 2 * Copyright(C) 2006 Cameron Rich 3 * 4 * This library is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU Lesser General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public License 15 * along with this library; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #ifndef BIGINT_HEADER 20 #define BIGINT_HEADER 21 22 /* enable features based on a 'super-set' capbaility. */ 23 #if defined(CONFIG_SSL_FULL_MODE) 24 #define CONFIG_SSL_ENABLE_CLIENT 25 #define CONFIG_SSL_CERT_VERIFICATION 26 #elif defined(CONFIG_SSL_ENABLE_CLIENT) 27 #define CONFIG_SSL_CERT_VERIFICATION 28 #endif 29 30 #include "os_port.h" 31 #include "bigint_impl.h" 32 33 #ifndef CONFIG_BIGINT_CHECK_ON 34 #define check(A) /**< disappears in normal production mode */ 35 #endif 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_free(BI_CTX *ctx, bigint *bi); 41 bigint *bi_copy(bigint *bi); 42 bigint *bi_clone(BI_CTX *ctx, const bigint *bi); 43 void bi_export(BI_CTX *ctx, bigint *bi, uint8_t *data, int size); 44 bigint *bi_import(BI_CTX *ctx, const uint8_t *data, int len); 45 bigint *int_to_bi(BI_CTX *ctx, comp i); 46 47 /* the functions that actually do something interesting */ 48 bigint *bi_add(BI_CTX *ctx, bigint *bia, bigint *bib); 49 bigint *bi_subtract(BI_CTX *ctx, bigint *bia, 50 bigint *bib, int *is_negative); 51 bigint *bi_divide(BI_CTX *ctx, bigint *bia, bigint *bim, int is_mod); 52 bigint *bi_multiply(BI_CTX *ctx, bigint *bia, bigint *bib); 53 bigint *bi_mod_power(BI_CTX *ctx, bigint *bi, bigint *biexp); 54 bigint *bi_mod_power2(BI_CTX *ctx, bigint *bi, bigint *bim, bigint *biexp); 55 int bi_compare(bigint *bia, bigint *bib); 56 void bi_set_mod(BI_CTX *ctx, bigint *bim, int mod_offset); 57 void bi_free_mod(BI_CTX *ctx, int mod_offset); 58 59 #ifdef CONFIG_SSL_FULL_MODE 60 void bi_print(const char *label, bigint *bi); 61 bigint *bi_str_import(BI_CTX *ctx, const char *data); 62 #endif 63 64 /** 65 * @def bi_mod 66 * Find the residue of B. bi_set_mod() must be called before hand. 67 */ 68 #define bi_mod(A, B) bi_divide(A, B, ctx->bi_mod[ctx->mod_offset], 1) 69 70 /** 71 * bi_residue() is technically the same as bi_mod(), but it uses the 72 * appropriate reduction technique (which is bi_mod() when doing classical 73 * reduction). 74 */ 75 #if defined(CONFIG_BIGINT_MONTGOMERY) 76 #define bi_residue(A, B) bi_mont(A, B) 77 bigint *bi_mont(BI_CTX *ctx, bigint *bixy); 78 #elif defined(CONFIG_BIGINT_BARRETT) 79 #define bi_residue(A, B) bi_barrett(A, B) 80 bigint *bi_barrett(BI_CTX *ctx, bigint *bi); 81 #else /* if defined(CONFIG_BIGINT_CLASSICAL) */ 82 #define bi_residue(A, B) bi_mod(A, B) 83 #endif 84 85 #ifdef CONFIG_BIGINT_SQUARE 86 bigint *bi_square(BI_CTX *ctx, bigint *bi); 87 #else 88 #define bi_square(A, B) bi_multiply(A, bi_copy(B), B) 89 #endif 90 91 #endif 92