/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef _SECRNG_H_ #define _SECRNG_H_ /* * secrng.h - public data structures and prototypes for the secure random * number generator
*/
/******************************************/ /* ** Random number generation. A cryptographically strong random number ** generator.
*/
#include"blapi.h"
/* the number of bytes to read from the system random number generator */ #define SYSTEM_RNG_SEED_COUNT 1024
SEC_BEGIN_PROTOS
/* ** The following functions are provided by the security library ** but are differently implemented for the UNIX, Win, and OS/2 ** versions
*/
/* ** Get the "noisiest" information available on the system. ** The amount of data returned depends on the system implementation. ** It will not exceed maxbytes, but may be (much) less. ** Returns number of noise bytes copied into buf, or zero if error.
*/ extern size_t RNG_GetNoise(void *buf, size_t maxbytes);
/* ** RNG_SystemInfoForRNG should be called before any use of SSL. It ** gathers up the system specific information to help seed the ** state of the global random number generator.
*/ externvoid RNG_SystemInfoForRNG(void);
/* ** Use the contents (and stat) of a file to help seed the ** global random number generator.
*/ externvoid RNG_FileForRNG(constchar *filename);
/* ** Get maxbytes bytes of random data from the system random number ** generator. ** Returns the number of bytes copied into buf -- maxbytes if success ** or zero if error. ** Errors: ** PR_NOT_IMPLEMENTED_ERROR There is no system RNG on the platform. ** SEC_ERROR_NEED_RANDOM The system RNG failed.
*/ extern size_t RNG_SystemRNG(void *buf, size_t maxbytes);
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