lib_md2.c

老外写的加密库cryptlib(版本3.1)

/****************************************************************************
*																			*
*							cryptlib MD2 Hash Routines						*
*						Copyright Peter Gutmann 1992-2003					*
*																			*
****************************************************************************/

#include <stdlib.h>
#if defined( INC_ALL )
  #include "crypt.h"
  #include "md2.h"
  #include "context.h"
  #include "libs.h"
#elif defined( INC_CHILD )
  #include "../crypt.h"
  #include "../crypt/md2.h"
  #include "../misc/context.h"
  #include "libs.h"
#else
  #include "crypt.h"
  #include "crypt/md2.h"
  #include "misc/context.h"
  #include "libs/libs.h"
#endif /* Compiler-specific includes */

#ifdef USE_MD2

/****************************************************************************
*																			*
*								MD2 Self-test Routines						*
*																			*
****************************************************************************/

/* Test the MD2 output against the test vectors given in RFC 1319 */

void md2HashBuffer( HASHINFO hashInfo, BYTE *outBuffer, const BYTE *inBuffer,
					const int length, const HASH_STATE hashState );

static const FAR_BSS struct {
	const char *data;						/* Data to hash */
	const int length;						/* Length of data */
	const BYTE digest[ MD2_DIGEST_LENGTH ];	/* Digest of data */
	} digestValues[] = {
	{ "", 0,
	  { 0x83, 0x50, 0xE5, 0xA3, 0xE2, 0x4C, 0x15, 0x3D,
		0xF2, 0x27, 0x5C, 0x9F, 0x80, 0x69, 0x27, 0x73 } },
	{ "a", 1,
	  { 0x32, 0xEC, 0x01, 0xEC, 0x4A, 0x6D, 0xAC, 0x72,
		0xC0, 0xAB, 0x96, 0xFB, 0x34, 0xC0, 0xB5, 0xD1 } },
	{ "abc", 3,
	  { 0xDA, 0x85, 0x3B, 0x0D, 0x3F, 0x88, 0xD9, 0x9B,
		0x30, 0x28, 0x3A, 0x69, 0xE6, 0xDE, 0xD6, 0xBB } },
	{ "message digest", 14,
	  { 0xAB, 0x4F, 0x49, 0x6B, 0xFB, 0x2A, 0x53, 0x0B,
		0x21, 0x9F, 0xF3, 0x30, 0x31, 0xFE, 0x06, 0xB0 } },
	{ "abcdefghijklmnopqrstuvwxyz", 26,
	  { 0x4E, 0x8D, 0xDF, 0xF3, 0x65, 0x02, 0x92, 0xAB,
		0x5A, 0x41, 0x08, 0xC3, 0xAA, 0x47, 0x94, 0x0B } },
	{ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789", 62,
	  { 0xDA, 0x33, 0xDE, 0xF2, 0xA4, 0x2D, 0xF1, 0x39,
		0x75, 0x35, 0x28, 0x46, 0xC3, 0x03, 0x38, 0xCD } },
	{ "12345678901234567890123456789012345678901234567890123456789012345678901234567890", 80,
	  { 0xD5, 0x97, 0x6F, 0x79, 0xD8, 0x3D, 0x3A, 0x0D,
		0xC9, 0x80, 0x6C, 0x3C, 0x66, 0xF3, 0xEF, 0xD8 } },
	{ NULL, 0, { 0 } }
	};

int md2SelfTest( void )
	{
	BYTE digest[ MD2_DIGEST_LENGTH ];
	int i;

	/* Test MD2 against the test vectors given in RFC 1319 */
	for( i = 0; digestValues[ i ].data != NULL; i++ )
		{
		md2HashBuffer( NULL, digest, ( BYTE * ) digestValues[ i ].data,
					   digestValues[ i ].length, HASH_ALL );
		if( memcmp( digest, digestValues[ i ].digest, MD2_DIGEST_LENGTH ) )
			return( CRYPT_ERROR );
		}

	return( CRYPT_OK );
	}

/****************************************************************************
*																			*
*								Control Routines							*
*																			*
****************************************************************************/

/* Return context subtype-specific information */

int md2GetInfo( const CAPABILITY_INFO_TYPE type, 
				void *varParam, const int constParam )
	{
	if( type == CAPABILITY_INFO_STATESIZE )
		return( sizeof( MD2_CTX ) );

	return( getInfo( type, varParam, constParam ) );
	}

/****************************************************************************
*																			*
*								MD2 Hash Routines							*
*																			*
****************************************************************************/

/* Hash data using MD2 */

int md2Hash( CONTEXT_INFO *contextInfoPtr, BYTE *buffer, int noBytes )
	{
	MD2_CTX *md2Info = ( MD2_CTX * ) contextInfoPtr->ctxHash->hashInfo;

	/* If the hash state was reset to allow another round of hashing, 
	   reinitialise things */
	if( !( contextInfoPtr->flags & CONTEXT_HASH_INITED ) )
		MD2_Init( md2Info );

	if( noBytes > 0 )
		MD2_Update( md2Info, buffer, noBytes );
	else
		MD2_Final( contextInfoPtr->ctxHash->hash, md2Info );

	return( CRYPT_OK );
	}

/* Internal API: Hash a single block of memory without the overhead of
   creating an encryption context */

void md2HashBuffer( HASHINFO hashInfo, BYTE *outBuffer, const BYTE *inBuffer,
					const int length, const HASH_STATE hashState )
	{
	MD2_CTX *md2Info = ( MD2_CTX * ) hashInfo;

	assert( hashState == HASH_ALL || hashInfo != NULL );
	assert( inBuffer == NULL || isReadPtr( inBuffer, length ) );

	switch( hashState )
		{
		case HASH_START:
			MD2_Init( md2Info );
			/* Drop through */

		case HASH_CONTINUE:
			MD2_Update( md2Info, ( BYTE * ) inBuffer, length );
			break;

		case HASH_END:
			if( inBuffer != NULL )
				MD2_Update( md2Info, ( BYTE * ) inBuffer, length );
			MD2_Final( outBuffer, md2Info );
			break;

		case HASH_ALL:
			{
			MD2_CTX md2InfoBuffer;

			MD2_Init( &md2InfoBuffer );
			MD2_Update( &md2InfoBuffer, ( BYTE * ) inBuffer, length );
			MD2_Final( outBuffer, &md2InfoBuffer );
			zeroise( &md2InfoBuffer, sizeof( MD2_CTX ) );
			break;
			}

		default:
			assert( NOTREACHED );
		}
	}
#endif /* USE_MD2 */