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 */ 22 typedef 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 */ 32 extern 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 */ 46 extern 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 */ 54 extern void MD4Print __P((MD4_CTX *)); 55 56 /* MD4Final(buf, MD) 57 ** Returns message digest from MD and terminates the message 58 ** digest computation. 59 */ 60 extern void MD4Final __P((unsigned char *, MD4_CTX *)); 61 62 /* 63 ** End of md4.h 64 ****************************(cut)***********************************/ 65