sha1.h
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#ifndef _SHA1_H_
#define _SHA1_H_
/* #include <stdint.h> */
/*
* 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
*
*/
typedef unsigned int uint32_t;
typedef unsigned char uint8_t;
typedef int int_least16_t;
#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 */
/* Index into message block array */
int_least16_t Message_Block_Index;
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