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STRUCT RNG_ALG(9) Programming Interface STRUCT RNG_ALG(9)

NAME

struct_rng_alg - random number generator definition

SYNOPSIS

struct rng_alg {


  int (* generate) (struct crypto_rng *tfm,const u8 *src, unsigned int slen,u8 *dst, unsigned int dlen);


  int (* seed) (struct crypto_rng *tfm, const u8 *seed, unsigned int slen);


  void (* set_ent) (struct crypto_rng *tfm, const u8 *data,unsigned int len);


  unsigned int seedsize;


  struct crypto_alg base;
};

MEMBERS

generate

The function defined by this variable obtains a random number. The random number generator transform must generate the random number out of the context provided with this call, plus any additional data if provided to the call.

seed

Seed or reseed the random number generator. With the invocation of this function call, the random number generator shall become ready for generation. If the random number generator requires a seed for setting up a new state, the seed must be provided by the consumer while invoking this function. The required size of the seed is defined with seedsize .

set_ent

Set entropy that would otherwise be obtained from entropy source. Internal use only.

seedsize

The seed size required for a random number generator initialization defined with this variable. Some random number generators does not require a seed as the seeding is implemented internally without the need of support by the consumer. In this case, the seed size is set to zero.

base

Common crypto API algorithm data structure.

AUTHORS

Stephan Mueller <smueller@chronox.de>

Author.

Marek Vasut <marek@denx.de>

Author.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.