Source code of Windows XP (NT5)
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#ifndef __MD4_H__
#define __MD4_H__
#ifndef RSA32API
#define RSA32API __stdcall
#endif
/*
** ********************************************************************
** md4.h -- Header file for implementation of **
** MD4 Message Digest Algorithm **
** Updated: 2/13/90 by Ronald L. Rivest **
** (C) 1990 RSA Data Security, Inc. **
** ********************************************************************
*/
#ifdef __cplusplus
extern "C" {
#endif
// MD4Update Errors
#define MD4_SUCCESS 0
#define MD4_TOO_BIG 1
#define MD4_ALREADY_DONE 2
// MD4 Digest length -- 4 word result == 16 bytes
#define MD4DIGESTLEN 16
// Block size of MD4 -- Assumes 8 bits per byte
#define MD4BLOCKSIZE 64
#define MD4BYTESTOBITS(bytes) ((bytes)*8) // MDupdate wants bits
/* MDstruct is the data structure for a message digest computation.
*/
typedef struct {
unsigned long buffer[4]; /* Holds 4-word result of MD computation */
unsigned char count[8]; /* Number of bits processed so far */
unsigned int done; /* Nonzero means MD computation finished */
} MDstruct, *MDptr;
/* MDbegin(MD)
** Input: MD -- an MDptr
** Initialize the MDstruct prepatory to doing a message digest
** computation.
**
** MTS: Assumes MDPtr is locked against simultaneous use.
*/
extern void MDbegin(MDptr);
/* MDupdate(MD,X,count)
** Input: MD -- an MDptr
** X -- a pointer to an array of unsigned characters.
** count -- the number of bits of X to use (an unsigned int).
** Updates MD using the first "count" bits of X.
** The array pointed to by X is not modified.
** If count is not a multiple of 8, MDupdate uses high bits of
** last byte.
** This is the basic input routine for a user.
** The routine terminates the MD computation when count < MD4BLOCKSIZE, so
** every MD computation should end with one call to MDupdate with a
** count less than MD4BLOCKSIZE. Zero is OK for a count.
**
** Return values:
** MD4_SUCCESS: success
** MD4_TOO_LONG: Hash is already terminated
** MD4_ALREADY_DONE: Length is invalid (too big)
**
** MTS: Assumes MDPtr is locked against simultaneous use.
**
**
** NOTE: MDupdate wants the length in BITS
*/
extern int MDupdate(MDptr, const unsigned char *pbData, int wLen);
/*
This second implementation of MD4 entry points is the newer style,
optimized implementation, compatible with newer code expecting these
entry point names.
Scott Field (sfield) 21-Oct-97
*/
#ifndef UINT4
#define UINT4 unsigned long
#endif
/* Data structure for MD4 (Message Digest) computation */
typedef struct {
UINT4 state[4]; /* state (ABCD) */
UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */
unsigned char buffer[64]; /* input buffer */
unsigned char digest[16]; /* actual digest after MD4Final call */
} MD4_CTX;
#define MD4_LEN 16
void RSA32API MD4Init (MD4_CTX *);
void RSA32API MD4Update (MD4_CTX *, unsigned char *, unsigned int);
void RSA32API MD4Final (MD4_CTX * );
#ifdef __cplusplus
}
#endif
#endif __MD4_H__