#pragma once

#define HASH_LENGTH 20
#define BLOCK_LENGTH 64

typedef struct httpd_sha1nfo {
	uint32_t buffer[BLOCK_LENGTH/4];
	uint32_t state[HASH_LENGTH/4];
	uint32_t byteCount;
	uint8_t bufferOffset;
	uint8_t keyBuffer[BLOCK_LENGTH];
	uint8_t innerHash[HASH_LENGTH];
} httpd_sha1nfo;

/* public API - prototypes - TODO: doxygen*/

/**
 */
void httpd_sha1_init(httpd_sha1nfo *s);
/**
 */
void httpd_sha1_writebyte(httpd_sha1nfo *s, uint8_t data);
/**
 */
void httpd_sha1_write(httpd_sha1nfo *s, const char *data, size_t len);
/**
 */
uint8_t* httpd_sha1_result(httpd_sha1nfo *s);
/**
 */
void httpd_sha1_initHmac(httpd_sha1nfo *s, const uint8_t* key, size_t keyLength);
/**
 */
uint8_t* httpd_sha1_resultHmac(httpd_sha1nfo *s);