/* 
 *  sha1.h 
 * 
 *  Description: 
 *      This is the header file for code which implements the Secure 
 *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published 
 *      April 17, 1995. 
 * 
 *      Many of the variable names in this code, especially the 
 *      single character names, were used because those were the names 
 *      used in the publication. 
 * 
 *      Please read the file sha1.c for more information. 
 * 
 */ 
 
#ifndef _SHA1_H_ 
#define _SHA1_H_ 
 
//#include  
/* 
 * If you do not have the ISO standard stdint.h header file, then you 
 * must typdef the following: 
 *  name             meaning 
 *  uint32_t         unsigned 32 bit integer 
 *  uint8_t          unsigned 8 bit integer (i.e., unsigned char) 
 *  int_least16_t    integer of >= 16 bits 
 * 
 */ 
 
#define	uint32_t unsigned int 
#define	uint8_t	 unsigned char 
#define	int_least16_t	 int 
 
#ifndef _SHA_enum_ 
#define _SHA_enum_ 
enum 
{ 
    shaSuccess = 0, 
    shaNull,            /* Null pointer parameter */ 
    shaInputTooLong,    /* input data too long */ 
    shaStateError       /* called Input after Result */ 
}; 
#endif 
#define SHA1HashSize 20 
 
/* 
 *  This structure will hold context information for the SHA-1 
 *  hashing operation 
 */ 
typedef struct SHA1Context 
{ 
    uint32_t Intermediate_Hash[SHA1HashSize/4]; /* Message Digest                  */ 
    uint32_t Length_Low;                        /* Message length in bits          */ 
    uint32_t Length_High;                       /* Message length in bits          */     
    int_least16_t Message_Block_Index;          /* Index into message block array  */ 
    uint8_t Message_Block[64];                  /* 512-bit message blocks          */ 
    int Computed;                               /* Is the digest computed?         */ 
    int Corrupted;                              /* Is the message digest corrupted?*/ 
} SHA1Context; 
 
/* 
 *  Function Prototypes 
 */ 
 
int SHA1Reset(SHA1Context*); 
int SHA1Input(SHA1Context*, const uint8_t *, unsigned int); 
int SHA1Result(SHA1Context*, uint8_t Message_Digest[SHA1HashSize]); 
 
#endif 
 








