bignum.c File Reference

#include "includes.h"
#include "common.h"
#include "bignum.h"
#include <tommath.h>

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Functions
int	bignum_add (const struct bignum *a, const struct bignum *b, struct bignum *c)
int	bignum_cmp (const struct bignum *a, const struct bignum *b)
int	bignum_cmp_d (const struct bignum *a, unsigned long b)
void	bignum_deinit (struct bignum *n)
int	bignum_exptmod (const struct bignum *a, const struct bignum *b, const struct bignum *c, struct bignum *d)
int	bignum_get_unsigned_bin (const struct bignum *n, u8 *buf, size_t *len)
size_t	bignum_get_unsigned_bin_len (struct bignum *n)
struct bignum *	bignum_init (void)
int	bignum_mul (const struct bignum *a, const struct bignum *b, struct bignum *c)
int	bignum_mulmod (const struct bignum *a, const struct bignum *b, const struct bignum *c, struct bignum *d)
int	bignum_set_unsigned_bin (struct bignum *n, const u8 *buf, size_t len)
int	bignum_sub (const struct bignum *a, const struct bignum *b, struct bignum *c)

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Function Documentation

int bignum_add	(	const struct bignum *	a,
		const struct bignum *	b,
		struct bignum *	c
	)

bignum_add - c = a + b : Bignum from bignum_init() : Bignum from bignum_init() : Bignum from bignum_init(); used to store the result of a + b Returns: 0 on success, -1 on failure

Definition at line 146 of file bignum.c.

int bignum_cmp	(	const struct bignum *	a,
		const struct bignum *	b
	)

bignum_cmp - Signed comparison : Bignum from bignum_init() : Bignum from bignum_init() Returns: 0 on success, -1 on failure

Definition at line 121 of file bignum.c.

int bignum_cmp_d	(	const struct bignum *	a,
		unsigned long	b
	)

bignum_cmd_d - Compare bignum to standard integer : Bignum from bignum_init() : Small integer Returns: 0 on success, -1 on failure

Definition at line 133 of file bignum.c.

void bignum_deinit

(

struct bignum *

n

)

bignum_deinit - Free bignum
: Bignum from bignum_init()

Definition at line 53 of file bignum.c.

int bignum_exptmod	(	const struct bignum *	a,
		const struct bignum *	b,
		const struct bignum *	c,
		struct bignum *	d
	)

bignum_exptmod - Modular exponentiation: d = a^b (mod c) : Bignum from bignum_init(); base : Bignum from bignum_init(); exponent : Bignum from bignum_init(); modulus : Bignum from bignum_init(); used to store the result of a^b (mod c) Returns: 0 on success, -1 on failure

Definition at line 221 of file bignum.c.

int bignum_get_unsigned_bin	(	const struct bignum *	n,
		u8 *	buf,
		size_t *	len
	)

bignum_get_unsigned_bin - Set binary buffer to unsigned bignum
: Bignum from bignum_init() : Buffer for the binary number : Length of the buffer, can be NULL if buffer is known to be long enough. Set to used buffer length on success if not NULL. Returns: 0 on success, -1 on failure

Definition at line 81 of file bignum.c.

size_t bignum_get_unsigned_bin_len

(

struct bignum *

n

)

bignum_get_unsigned_bin - Get length of bignum as an unsigned binary buffer
: Bignum from bignum_init() Returns: Length of n if written to a binary buffer

Definition at line 67 of file bignum.c.

struct bignum* bignum_init

(

void

)

[read]

bignum_init - Allocate memory for bignum Returns: Pointer to allocated bignum or NULL on failure

Definition at line 36 of file bignum.c.

int bignum_mul	(	const struct bignum *	a,
		const struct bignum *	b,
		struct bignum *	c
	)

bignum_mul - c = a * b : Bignum from bignum_init() : Bignum from bignum_init() : Bignum from bignum_init(); used to store the result of a * b Returns: 0 on success, -1 on failure

Definition at line 182 of file bignum.c.

int bignum_mulmod	(	const struct bignum *	a,
		const struct bignum *	b,
		const struct bignum *	c,
		struct bignum *	d
	)

bignum_mulmod - d = a * b (mod c) : Bignum from bignum_init() : Bignum from bignum_init() : Bignum from bignum_init(); modulus : Bignum from bignum_init(); used to store the result of a * b (mod c) Returns: 0 on success, -1 on failure

Definition at line 201 of file bignum.c.

int bignum_set_unsigned_bin	(	struct bignum *	n,
		const u8 *	buf,
		size_t	len
	)

bignum_set_unsigned_bin - Set bignum based on unsigned binary buffer
: Bignum from bignum_init(); to be set to the given value : Buffer with unsigned binary value : Length of buf in octets Returns: 0 on success, -1 on failure

Definition at line 105 of file bignum.c.

int bignum_sub	(	const struct bignum *	a,
		const struct bignum *	b,
		struct bignum *	c
	)

bignum_sub - c = a - b : Bignum from bignum_init() : Bignum from bignum_init() : Bignum from bignum_init(); used to store the result of a - b Returns: 0 on success, -1 on failure

Definition at line 164 of file bignum.c.