sha1-internal.c File Reference

SHA1 hash implementation and interface functions. More...

#include "includes.h"
#include "common.h"
#include "sha1.h"
#include "sha1_i.h"
#include "md5.h"
#include "crypto.h"

Defines
#define	SHA1HANDSOFF
#define	rol(value, bits)   (((value) << (bits)) | ((value) >> (32 - (bits))))
#define	blk0(i)
#define	blk(i)
#define	R0(v, w, x, y, z, i)
#define	R1(v, w, x, y, z, i)
#define	R2(v, w, x, y, z, i)   z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); w = rol(w, 30);
#define	R3(v, w, x, y, z, i)
#define	R4(v, w, x, y, z, i)
Typedefs
typedef struct SHA1Context	SHA1_CTX
Functions
void	SHA1Transform (u32 state[5], const unsigned char buffer[64])
int	sha1_vector (size_t num_elem, const u8 *addr[], const size_t *len, u8 *mac)
	SHA-1 hash for data vector.
void	SHA1Init (SHA1_CTX *context)
void	SHA1Update (SHA1_CTX *context, const void *_data, u32 len)
void	SHA1Final (unsigned char digest[20], SHA1_CTX *context)

---

Detailed Description

SHA1 hash implementation and interface functions.

Copyright

Copyright (c) 2003-2005, Jouni Malinen <j@w1.fi>

This software may be distributed under the terms of the BSD license. See README for more details.

---

Define Documentation

#define blk

(

i

)

Value:

(block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ \
        block->l[(i + 8) & 15] ^ block->l[(i + 2) & 15] ^ block->l[i & 15], 1))

#define blk0

(

i

)

Value:

(block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | \
        (rol(block->l[i], 8) & 0x00FF00FF))

#define R0	(		v,
			w,
			x,
			y,
			z,
			i
	)

Value:

z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
        w = rol(w, 30);

#define R1	(		v,
			w,
			x,
			y,
			z,
			i
	)

Value:

z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
        w = rol(w, 30);

#define R3	(		v,
			w,
			x,
			y,
			z,
			i
	)

Value:

z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
        w = rol(w, 30);

#define R4	(		v,
			w,
			x,
			y,
			z,
			i
	)

Value:

z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
        w=rol(w, 30);

---

Function Documentation

int sha1_vector	(	size_t	num_elem,
		const u8 *	addr[],
		const size_t *	len,
		u8 *	mac
	)

SHA-1 hash for data vector.

Parameters:

num_elem	Number of elements in the data vector
addr	Pointers to the data areas
len	Lengths of the data blocks
mac	Buffer for the hash

Returns:

0 on success, -1 of failure