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#ifndef _GPXE_CHAP_H
#define _GPXE_CHAP_H
/** @file
*
* CHAP protocol
*
*/
#include <stdint.h>
#include <gpxe/md5.h>
struct digest_algorithm;
/** A CHAP response */
struct chap_response {
/** Digest algorithm used for the response */
struct digest_algorithm *digest;
/** Context used by the digest algorithm */
uint8_t *digest_context;
/** CHAP response */
uint8_t *response;
/** Length of CHAP response */
size_t response_len;
};
extern int chap_init ( struct chap_response *chap,
struct digest_algorithm *digest );
extern void chap_update ( struct chap_response *chap, const void *data,
size_t len );
extern void chap_respond ( struct chap_response *chap );
extern void chap_finish ( struct chap_response *chap );
/**
* Add identifier data to the CHAP challenge
*
* @v chap CHAP response
* @v identifier CHAP identifier
*
* The CHAP identifier is the first byte of the CHAP challenge. This
* function is a notational convenience for calling chap_update() for
* the identifier byte.
*/
static inline void chap_set_identifier ( struct chap_response *chap,
unsigned int identifier ) {
uint8_t ident_byte = identifier;
chap_update ( chap, &ident_byte, sizeof ( ident_byte ) );
}
#endif /* _GPXE_CHAP_H */
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