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/*
* 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_
/*
* We assume that the standard asterisk headers have been included before this one.
* 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)
*
*/
#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
/*!
* \brief 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 */
uint32_t Message_Block_Index; /*!< 8 bits actually suffice */
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
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