Keccak functions

int eth_keccak256(uint8_t *dest, const uint8_t *bytes, size_t len)

Computes the keccak hash for the input data.

#include <stdio.h>
#include <ethc/keccak256.h>

int main(void) {
  uint8_t keccak[32], data[2] = {0x28, 0xa1};
  size_t datalen = 2, i;

  eth_keccak256(keccak, data, datalen);

  for(i = 0; i < 32; i++)
    printf("%.2x", keccak[i]);
  printf("\n");

  return 0;
}

Parameters

• dest – [out] A pointer to a 32-byte array to write the hash to.

• bytes – [in] A pointer to the input data.

• len – [in] The length of the input data.

int eth_keccak256p(uint8_t *dest, const uint8_t *bytes, size_t len)

Computes the keccak hash for the input data with \x19Ethereum Signed Message:\n prefix.

Parameters

• dest – [out] A pointer to a 32-byte array to write the hash to.

• bytes – [in] A pointer to the input data.

• len – [in] The length of the input data.