/* bigint.h */
/*
This file is part of the ARM-Crypto-Lib.
- Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
+ Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#ifndef BIGINT_H_
#define BIGINT_H_
+#include <stddef.h>
#include <stdint.h>
+#include <limits.h>
-typedef uint8_t bigint_word_t;
+#define BIGINT_WORD_SIZE 8
+
+#if BIGINT_WORD_SIZE == 8
+typedef uint8_t bigint_word_t;
typedef uint16_t bigint_wordplus_t;
typedef int16_t bigint_wordplus_signed_t;
-typedef uint16_t bigint_ptr_int_t; /* this must be an integer of the size of a pointer for the target architecture */
-#define BIGINT_WORD_SIZE 8
+#elif BIGINT_WORD_SIZE == 16
+typedef uint16_t bigint_word_t;
+typedef uint32_t bigint_wordplus_t;
+typedef int32_t bigint_wordplus_signed_t;
+#elif BIGINT_WORD_SIZE == 32
+typedef uint32_t bigint_word_t;
+typedef uint64_t bigint_wordplus_t;
+typedef int64_t bigint_wordplus_signed_t;
+#else
+#error "INVALID VALUE FOR BIGINT_WORD_SIZE"
+#endif
-#define BIGINT_FBS_MASK (BIGINT_WORD_SIZE-1) /* the last five bits indicate which is the first bit set */
+
+#define BIGINT_FBS_MASK (BIGINT_WORD_SIZE - 1) /* the last five bits indicate which is the first bit set */
#define BIGINT_NEG_MASK 0x80 /* this bit indicates a negative value */
+
+typedef size_t bigint_length_t;
+typedef uint_fast8_t bigint_info_t;
+
typedef struct{
- uint16_t length_B;
- uint8_t info;
- bigint_word_t *wordv; /* word vector, pointing to the LSB */
+ bigint_length_t length_W;
+ bigint_info_t info;
+ bigint_word_t *wordv; /* word vector, pointing to the LSB */
}bigint_t;
/******************************************************************************/
-void bigint_adjust(bigint_t* a);
-uint32_t bigint_get_first_set_bit(bigint_t* a);
-uint32_t bigint_get_last_set_bit(bigint_t* a);
-uint16_t bigint_length_b(bigint_t* a);
-uint16_t bigint_length_B(bigint_t* a);
-void bigint_copy(bigint_t* dest, const bigint_t* src);
-void bigint_add_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
-void bigint_add_scale_u(bigint_t* dest, const bigint_t* a, uint16_t scale);
-void bigint_sub_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
+void bigint_adjust(bigint_t *a);
+int32_t bigint_get_first_set_bit(const bigint_t *a);
+int32_t bigint_get_last_set_bit(const bigint_t *a);
+bigint_length_t bigint_length_b(const bigint_t *a);
+bigint_length_t bigint_length_B(const bigint_t *a);
+void bigint_copy(bigint_t *dest, const bigint_t *src);
+void bigint_add_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
+void bigint_add_scale_u(bigint_t *dest, const bigint_t *a, bigint_length_t scale);
+void bigint_sub_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
int8_t bigint_cmp_u(const bigint_t * a, const bigint_t * b);
-void bigint_add_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
-void bigint_sub_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
-int8_t bigint_cmp_s(const bigint_t* a, const bigint_t* b);
-void bigint_shiftleft(bigint_t* a, uint16_t shift);
-void bigint_shiftright(bigint_t* a, uint16_t shift);
-void bigint_xor(bigint_t* dest, const bigint_t* a);
-void bigint_set_zero(bigint_t* a);
-void bigint_mul_u(bigint_t* dest, const bigint_t* a, const bigint_t* b);
-void bigint_mul_s(bigint_t* dest, const bigint_t* a, const bigint_t* b);
-void bigint_square(bigint_t* dest, const bigint_t* a);
-void bigint_sub_u_bitscale(bigint_t* a, const bigint_t* b, uint16_t bitscale);
-void bigint_reduce(bigint_t* a, const bigint_t* r);
-void bigint_expmod_u(bigint_t* dest, const bigint_t* a, const bigint_t* exp, const bigint_t* r);
-void bigint_gcdext(bigint_t* gcd, bigint_t* a, bigint_t* b, const bigint_t* x, const bigint_t* y);
-void bigint_inverse(bigint_t* dest, const bigint_t* a, const bigint_t* m);
-void bigint_changeendianess(bigint_t* a);
-/******************************************************************************/
+void bigint_add_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
+void bigint_sub_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
+int8_t bigint_cmp_s(const bigint_t *a, const bigint_t *b);
+void bigint_shiftleft_bits(bigint_t *a, uint8_t shift);
+void bigint_shiftleft(bigint_t *a, bigint_length_t shift);
+void bigint_shiftright_1bit(bigint_t *a);
+void bigint_shiftright_1word(bigint_t *a);
+void bigint_shiftright(bigint_t *a, bigint_length_t shift);
+void bigint_xor(bigint_t *dest, const bigint_t *a);
+void bigint_set_zero(bigint_t *a);
+void bigint_mul_u(bigint_t *dest, const bigint_t *a, const bigint_t *b);
+void bigint_mul_s(bigint_t *dest, const bigint_t *a, const bigint_t *b);
+void bigint_square(bigint_t *dest, const bigint_t *a);
+void bigint_sub_u_bitscale(bigint_t *a, const bigint_t *b, bigint_length_t bitscale);
+void bigint_reduce(bigint_t *a, const bigint_t *r);
+void bigint_mul_word_u(bigint_t *a, bigint_word_t b);
+void bigint_gcdext(bigint_t *gcd, bigint_t *a, bigint_t *b, const bigint_t *x, const bigint_t *y);
+void bigint_inverse(bigint_t *dest, const bigint_t *a, const bigint_t *m);
+void bigint_changeendianess(bigint_t *a);
+void bigint_clip(bigint_t *dest, bigint_length_t s);
+void bigint_mont_mul(bigint_t *dest, const bigint_t *a, const bigint_t *b, const bigint_t *m, const bigint_t *m_);
+void bigint_mont_red(bigint_t *dest, const bigint_t *a, const bigint_t *m, const bigint_t *m_);
+void bigint_mont_gen_m_(bigint_t* dest, const bigint_t* m);
+void bigint_mont_trans(bigint_t *dest, const bigint_t *a, const bigint_t *m);
+
+void bigint_expmod_u(bigint_t *dest, const bigint_t *a, const bigint_t *exp, const bigint_t *r);
+void bigint_expmod_u_sam(bigint_t *dest, const bigint_t *a, const bigint_t *exp, const bigint_t *r);
+void bigint_expmod_u_mont_sam(bigint_t *dest, const bigint_t *a, const bigint_t *exp, const bigint_t *r);
+void bigint_expmod_u_mont_accel(bigint_t *dest, const bigint_t *a, const bigint_t *exp, const bigint_t *r, const bigint_t *m_);
+
#endif /*BIGINT_H_*/
projects / avr-crypto-lib.git / blobdiff