ubc_check.h - mozsearch

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/***

 * Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com>

 * Distributed under the MIT Software License.

 * See accompanying file LICENSE.txt or copy at

 * https://opensource.org/licenses/MIT

 ***/

/*

// this file was generated by the 'parse_bitrel' program in the tools section

// using the data files from directory 'tools/data/3565'

//

// sha1_dvs contains a list of SHA-1 Disturbance Vectors (DV) to check

// dvType, dvK and dvB define the DV: I(K,B) or II(K,B) (see the paper)

// dm[80] is the expanded message block XOR-difference defined by the DV

// testt is the step to do the recompression from for collision detection

// maski and maskb define the bit to check for each DV in the dvmask returned by ubc_check

//

// ubc_check takes as input an expanded message block and verifies the unavoidable

bitconditions for all listed DVs

// it returns a dvmask where each bit belonging to a DV is set if all unavoidable bitconditions

for that DV have been met

// thus one needs to do the recompression check for each DV that has its bit set

*/

#ifndef SHA1DC_UBC_CHECK_H

#define SHA1DC_UBC_CHECK_H

#if defined(__cplusplus)

extern "C" {

#endif

#ifndef SHA1DC_NO_STANDARD_INCLUDES

#include <stdint.h>

#endif

#define DVMASKSIZE 1

typedef struct {

    int      dvType;

    int      dvK;

    int      dvB;

    int      testt;

    int      maski;

    int      maskb;

    uint32_t dm[80];

} dv_info_t;

extern dv_info_t sha1_dvs[];

void             ubc_check(const uint32_t W[80], uint32_t dvmask[DVMASKSIZE]);

#define DOSTORESTATE58

#define DOSTORESTATE65

#define CHECK_DVMASK(_DVMASK) (0 != _DVMASK[0])

#if defined(__cplusplus)

#endif

#ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H

#include SHA1DC_CUSTOM_TRAILING_INCLUDE_UBC_CHECK_H

#endif

#endif