113 lines
4.6 KiB
C
113 lines
4.6 KiB
C
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#ifndef BIGINT_IMPL_HEADER
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#define BIGINT_IMPL_HEADER
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#include "generic/typedef.h"
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// #include "ssp_config.h"
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#define CONFIG_BIGINT_BARRETT 1
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//#define CONFIG_BIGINT_CRT 1
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#define CONFIG_BIGINT_SQUARE 1
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//#define CONFIG_INTEGER_16BIT 1
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//#define CONFIG_BIGINT_SLIDING_WINDOW
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//#define CONFIG_BIGINT_MONTGOMERY 1
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//#define CONFIG_BIGINT_KARATSUBA
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//#define SQU_KARATSUBA_THRESH 32
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//#define MUL_KARATSUBA_THRESH 64
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/* Maintain a number of precomputed variables when doing reduction */
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#define BIGINT_M_OFFSET 0 /**< Normal modulo offset. */
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#ifdef CONFIG_BIGINT_CRT
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#define BIGINT_P_OFFSET 1 /**< p modulo offset. */
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#define BIGINT_Q_OFFSET 2 /**< q module offset. */
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#define BIGINT_NUM_MODS 3 /**< The number of modulus constants used. */
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#else
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#define BIGINT_NUM_MODS 2
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#endif
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/* Architecture specific functions for big ints */
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#if defined(CONFIG_INTEGER_8BIT)
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#define COMP_RADIX 256U /**< Max component + 1 */
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#define COMP_MAX 0xFFFFU/**< (Max dbl comp -1) */
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#define COMP_BIT_SIZE 8 /**< Number of bits in a component. */
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#define COMP_BYTE_SIZE 1 /**< Number of bytes in a component. */
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#define COMP_NUM_NIBBLES 2 /**< Used For diagnostics only. */
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typedef u8 comp; /**< A single precision component. */
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typedef u16 long_comp; /**< A double precision component. */
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typedef int16_t slong_comp; /**< A signed double precision component. */
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#elif defined(CONFIG_INTEGER_16BIT)
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#define COMP_RADIX 65536U /**< Max component + 1 */
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#define COMP_MAX 0xFFFFFFFFU/**< (Max dbl comp -1) */
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#define COMP_BIT_SIZE 16 /**< Number of bits in a component. */
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#define COMP_BYTE_SIZE 2 /**< Number of bytes in a component. */
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#define COMP_NUM_NIBBLES 4 /**< Used For diagnostics only. */
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typedef u16 comp; /**< A single precision component. */
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typedef u32 long_comp; /**< A double precision component. */
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typedef s32 slong_comp; /**< A signed double precision component. */
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#else /* regular 32 bit */
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#if defined(WIN32) && !defined(__GNUC__)
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#define COMP_RADIX 4294967296i64
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#define COMP_MAX 0xFFFFFFFFFFFFFFFFui64
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#else
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#define COMP_RADIX 4294967296ULL /**< Max component + 1 */
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#define COMP_MAX 0xFFFFFFFFFFFFFFFFULL/**< (Max dbl comp -1) */
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#endif
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#define COMP_BIT_SIZE 32 /**< Number of bits in a component. */
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#define COMP_BYTE_SIZE 4 /**< Number of bytes in a component. */
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#define COMP_NUM_NIBBLES 8 /**< Used For diagnostics only. */
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typedef u32 comp; /**< A single precision component. */
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typedef unsigned long long long_comp; /**< A double precision component. */
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typedef long long slong_comp; /**< A signed double precision component. */
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#endif
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/**
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* @struct _bigint
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* @brief A big integer basic object
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*/
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struct _bigint {
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struct _bigint *next; /**< The next bigint in the cache. */
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short size; /**< The number of components in this bigint. */
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short max_comps; /**< The heapsize allocated for this bigint */
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int refs; /**< An internal reference count. */
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comp *comps; /**< A ptr to the actual component data */
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};
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typedef struct _bigint bigint; /**< An alias for _bigint */
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/**
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* Maintains the state of the cache, and a number of variables used in
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* reduction.
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*/
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typedef struct { /**< A big integer "session" context. */
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bigint *active_list; /**< Bigints currently used. */
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bigint *free_list; /**< Bigints not used. */
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bigint *bi_radix; /**< The radix used. */
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bigint *bi_mod[BIGINT_NUM_MODS]; /**< modulus */
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#if defined(CONFIG_BIGINT_MONTGOMERY)
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bigint *bi_RR_mod_m[BIGINT_NUM_MODS]; /**< R^2 mod m */
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bigint *bi_R_mod_m[BIGINT_NUM_MODS]; /**< R mod m */
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comp N0_dash[BIGINT_NUM_MODS];
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#elif defined(CONFIG_BIGINT_BARRETT)
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bigint *bi_mu[BIGINT_NUM_MODS]; /**< Storage for mu */
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#endif
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bigint *bi_normalised_mod[BIGINT_NUM_MODS]; /**< Normalised mod storage. */
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bigint **g; /**< Used by sliding-window. */
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int window; /**< The size of the sliding window */
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int active_count; /**< Number of active bigints. */
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int free_count; /**< Number of free bigints. */
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#ifdef CONFIG_BIGINT_MONTGOMERY
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u8 use_classical; /**< Use classical reduction. */
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#endif
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u8 mod_offset; /**< The mod offset we are using */
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int np_bit;
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char *mem_pool;
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int tol_used;
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} BI_CTX;
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#define PERMANENT 0x7FFF55AA /**< A magic number for permanents. */
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#endif
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