sha1.c File Reference

Calculation of SHA-1 digest as defined in FIPS PUB 180-4 (2015) More...

#include "sha1.h"
#include <string.h>
#include "mhd_bithelpers.h"
#include "mhd_assert.h"

Include dependency graph for sha1.c:

Go to the source code of this file.

Macros
#define	Ch(x, y, z)   ( (z) ^ ((x) & ((y) ^ (z))) )
#define	Maj(x, y, z)   ( ((x) & (y)) ^ ((z) & ((x) ^ (y))) )
#define	Par(x, y, z)   ( (x) ^ (y) ^ (z) )
#define	SHA1STEP32(vA, vB, vC, vD, vE, ft, kt, wt)
#define	GET_W_FROM_DATA(buf, t)
#define	K00   UINT32_C(0x5a827999)
#define	K20   UINT32_C(0x6ed9eba1)
#define	K40   UINT32_C(0x8f1bbcdc)
#define	K60   UINT32_C(0xca62c1d6)
#define	Wgen(w, t)
#define	SHA1_SIZE_OF_LEN_ADD   (64 / 8)

Functions
void	MHD_SHA1_init (void *ctx_)
static void	sha1_transform (uint32_t H[_SHA1_DIGEST_LENGTH], const uint8_t data[SHA1_BLOCK_SIZE])
void	MHD_SHA1_update (void *ctx_, const uint8_t *data, size_t length)
void	MHD_SHA1_finish (void *ctx_, uint8_t digest[SHA1_DIGEST_SIZE])

Detailed Description

Calculation of SHA-1 digest as defined in FIPS PUB 180-4 (2015)

Author

Karlson2k (Evgeny Grin)

Definition in file sha1.c.

Macro Definition Documentation

Ch

#define Ch	(		x,
			y,
			z
	)		( (z) ^ ((x) & ((y) ^ (z))) )

GET_W_FROM_DATA

#define GET_W_FROM_DATA	(		buf,
			t
	)

Value:

  _MHD_GET_32BIT_BE ((const void *)(((const uint8_t*) (buf)) + \
                                    (t) * SHA1_BYTES_IN_WORD))

K00

#define K00   UINT32_C(0x5a827999)

K20

#define K20   UINT32_C(0x6ed9eba1)

K40

#define K40   UINT32_C(0x8f1bbcdc)

K60

#define K60   UINT32_C(0xca62c1d6)

Maj

#define Maj	(		x,
			y,
			z
	)		( ((x) & (y)) ^ ((z) & ((x) ^ (y))) )

Par

#define Par	(		x,
			y,
			z
	)		( (x) ^ (y) ^ (z) )

SHA1_SIZE_OF_LEN_ADD

#define SHA1_SIZE_OF_LEN_ADD   (64 / 8)

Size of "length" padding addition in bytes. See FIPS PUB 180-4 paragraph 5.1.1.

Definition at line 305 of file sha1.c.

SHA1STEP32

#define SHA1STEP32	(		vA,
			vB,
			vC,
			vD,
			vE,
			ft,
			kt,
			wt
	)

Value:

    do {                         \
    (vE) += _MHD_ROTL32 ((vA), 5) + ft ((vB), (vC), (vD)) + (kt) + (wt); \
    (vB) = _MHD_ROTL32 ((vB), 30); } while (0)

Wgen

#define Wgen	(		w,
			t
	)

Value:

                              _MHD_ROTL32((w)[(t + 13) & 0xf] ^ (w)[(t + 8) & 0xf] \
                              ^ (w)[(t + 2) & 0xf] ^ (w)[t & 0xf], 1)

Function Documentation

MHD_SHA1_finish()

void MHD_SHA1_finish	(	void *	ctx_,
		uint8_t	digest[SHA1_DIGEST_SIZE]
	)

Finalise SHA-1 calculation, return digest.

Parameters

	ctx_	must be a struct sha1_ctx *
[out]	digest	set to the hash, must be SHA1_DIGEST_SIZE bytes

< Number of processed bits

< Number of bytes in buffer

Definition at line 314 of file sha1.c.

References _MHD_PUT_32BIT_BE, _MHD_PUT_64BIT_BE_SAFE(), _MHD_UINT32_ALIGN, _SHA1_DIGEST_LENGTH, sha1_ctx::buffer, sha1_ctx::count, sha1_ctx::H, SHA1_BLOCK_SIZE, SHA1_BYTES_IN_WORD, SHA1_DIGEST_SIZE, SHA1_SIZE_OF_LEN_ADD, and sha1_transform().

Here is the call graph for this function:

MHD_SHA1_init()

void MHD_SHA1_init

(

void *

ctx_

)

Initialise structure for SHA-1 calculation.

Parameters

ctx_	must be a struct sha1_ctx *

Definition at line 41 of file sha1.c.

References sha1_ctx::count, and sha1_ctx::H.

MHD_SHA1_update()

void MHD_SHA1_update	(	void *	ctx_,
		const uint8_t *	data,
		size_t	length
	)

Process portion of bytes.

Parameters

ctx_	must be a struct sha1_ctx *
data	bytes to add to hash
length	number of bytes in data

< Number of bytes in buffer

Definition at line 252 of file sha1.c.

References sha1_ctx::buffer, sha1_ctx::count, data, sha1_ctx::H, mhd_assert, NULL, SHA1_BLOCK_SIZE, and sha1_transform().

Here is the call graph for this function:

sha1_transform()

static void sha1_transform ( uint32_t  H[_SHA1_DIGEST_LENGTH], const uint8_t  data[SHA1_BLOCK_SIZE]  )

static

Base of SHA-1 transformation. Gets full 512 bits / 64 bytes block of data and updates hash values;

Parameters

H	hash values
data	data, must be exactly 64 bytes long

Definition at line 64 of file sha1.c.

References _MHD_UINT32_ALIGN, Ch, data, GET_W_FROM_DATA, sha1_ctx::H, K00, K20, K40, K60, Maj, Par, SHA1_BLOCK_SIZE, SHA1STEP32, and Wgen.

Referenced by MHD_SHA1_finish(), and MHD_SHA1_update().

Here is the caller graph for this function: