solutions/zokrates_prover/.zokrates/stdlib/hashes/sha256/embed/512bitPadded.zok

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2023-12-05 06:06:28 +00:00
import "./1024bit" as sha256;
// A function that takes 2 bool[256] arrays as inputs
// and returns their sha256 full round output as an array of 256 bool.
def main(bool[256] a, bool[256] b) -> bool[256] {
// Hash is computed on the full 512bit block size
// padding does not fit in the primary block
// add dummy block (single "1" followed by "0" + total length)
bool[256] dummyblock1 = [true, ...[false; 255]];
// Total length of message is 512 bits: 0b1000000000
bool[256] dummyblock2 = [...[false; 246], true, ...[false; 9]];
bool[256] digest = sha256(a, b, dummyblock1, dummyblock2);
return digest;
}