1 2/* 3** ******************************************************************** 4** md4.h -- Header file for implementation of ** 5** MD4 Message Digest Algorithm ** 6** Updated: 2/13/90 by Ronald L. Rivest ** 7** (C) 1990 RSA Data Security, Inc. ** 8** ******************************************************************** 9*/ 10 11#ifndef __P 12# if defined(__STDC__) || defined(__GNUC__) 13# define __P(x) x 14# else 15# define __P(x) () 16# endif 17#endif 18 19 20/* MDstruct is the data structure for a message digest computation. 21*/ 22typedef struct { 23 unsigned int buffer[4]; /* Holds 4-word result of MD computation */ 24 unsigned char count[8]; /* Number of bits processed so far */ 25 unsigned int done; /* Nonzero means MD computation finished */ 26} MD4_CTX; 27 28/* MD4Init(MD4_CTX *) 29** Initialize the MD4_CTX prepatory to doing a message digest 30** computation. 31*/ 32extern void MD4Init __P((MD4_CTX *MD)); 33 34/* MD4Update(MD,X,count) 35** Input: X -- a pointer to an array of unsigned characters. 36** count -- the number of bits of X to use (an unsigned int). 37** Updates MD using the first "count" bits of X. 38** The array pointed to by X is not modified. 39** If count is not a multiple of 8, MD4Update uses high bits of 40** last byte. 41** This is the basic input routine for a user. 42** The routine terminates the MD computation when count < 512, so 43** every MD computation should end with one call to MD4Update with a 44** count less than 512. Zero is OK for a count. 45*/ 46extern void MD4Update __P((MD4_CTX *MD, unsigned char *X, unsigned int count)); 47 48/* MD4Print(MD) 49** Prints message digest buffer MD as 32 hexadecimal digits. 50** Order is from low-order byte of buffer[0] to high-order byte 51** of buffer[3]. 52** Each byte is printed with high-order hexadecimal digit first. 53*/ 54extern void MD4Print __P((MD4_CTX *)); 55 56/* MD4Final(buf, MD) 57** Returns message digest from MD and terminates the message 58** digest computation. 59*/ 60extern void MD4Final __P((unsigned char *, MD4_CTX *)); 61 62/* 63** End of md4.h 64****************************(cut)***********************************/ 65