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#ifndef _IPXE_RBG_H
#define _IPXE_RBG_H
/** @file
*
* RBG mechanism
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/drbg.h>
/** An RBG */
struct random_bit_generator {
/** DRBG state */
struct drbg_state state;
};
extern struct random_bit_generator rbg;
/**
* Generate bits using RBG
*
* @v additional Additional input
* @v additional_len Length of additional input
* @v prediction_resist Prediction resistance is required
* @v data Output buffer
* @v len Length of output buffer
* @ret rc Return status code
*
* This is the RBG_Generate function defined in ANS X9.82 Part 4
* (April 2011 Draft) Section 9.1.2.2.
*/
static inline int rbg_generate ( const void *additional, size_t additional_len,
int prediction_resist, void *data,
size_t len ) {
return drbg_generate ( &rbg.state, additional, additional_len,
prediction_resist, data, len );
}
#endif /* _IPXE_RBG_H */
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