Skip to content
charmOS docs

Entropy Pool

include/crypto/entropy_pool.h View source View on GitHub

Structs

Section titled “Structs”

entropy_pool

Section titled “entropy_pool”
struct entropy_pool (4 fields) source
§ uint8_t buffer[ENTROPY_POOL_SIZE]

Raw pool data

§ uint64_t write_pos

Circular buffer write position

§ uint64_t entropy_bits

Estimated entropy in bits

§ struct spinlock lock

To protect concurrent access

Functions

Section titled “Functions”

entropy_pool_init

Section titled “entropy_pool_init”
void entropy_pool_init(struct entropy_pool *pool)
source

entropy_pool_add

Section titled “entropy_pool_add”
void entropy_pool_add(
    struct entropy_pool *pool,
    const uint8_t *data,
    uint64_t len,
    uint64_t entropy_bits
)
source

entropy_pool_decrease

Section titled “entropy_pool_decrease”
void entropy_pool_decrease(struct entropy_pool *pool, uint64_t bits)
source

entropy_pool_seed

Section titled “entropy_pool_seed”
void entropy_pool_seed(struct entropy_pool *pool)
source

entropy_pool_reseed

Section titled “entropy_pool_reseed”
void entropy_pool_reseed(struct entropy_pool *pool)
source

Macros

Section titled “Macros”

ENTROPY_POOL_SIZE

Section titled “ENTROPY_POOL_SIZE”
#define ENTROPY_POOL_SIZE 64
source

512 bits

ENTROPY_MAX_BITS

Section titled “ENTROPY_MAX_BITS”
#define ENTROPY_MAX_BITS to_bits(ENTROPY_POOL_SIZE)
source