#ifndef _LRAD_SHA1_H
#define _LRAD_SHA1_H

/*
 *  FreeRADIUS defines to ensure globally unique SHA1 function names,
 *  so that we don't pick up vendor-specific broken SHA1 libraries.
 */
#define SHA1_CTX		librad_SHA1_CTX
#define SHA1Transform		librad_SHA1Transform
#define SHA1Init		librad_SHA1Init
#define SHA1Update		librad_SHA1Update
#define SHA1Final       	librad_SHA1Final

typedef struct {
    uint32_t state[5];
    uint32_t count[2];
    uint8_t buffer[64];
} SHA1_CTX;

void SHA1Transform(uint32_t state[5], const uint8_t buffer[64]);
void SHA1Init(SHA1_CTX* context);
void SHA1Update(SHA1_CTX* context, const uint8_t* data, unsigned int len);
void SHA1Final(uint8_t digest[20], SHA1_CTX* context);

/*
 * this version implements a raw SHA1 transform, no length is appended,
 * nor any 128s out to the block size.
 */
void SHA1FinalNoLen(uint8_t digest[20], SHA1_CTX* context);

/*
 * FIPS 186-2 PRF based upon SHA1.
 */
extern void fips186_2prf(uint8_t mk[20], uint8_t finalkey[160]);


#endif /* _LRAD_SHA1_H */