-- iteration 34: digests end to end from .wo — sha1/sha256/hmac_sha256
-- over Bytes, printed through base64_encode (iteration 19). Expected
-- values are the RFC vectors: SHA-1("abc"), SHA-256("abc"), and
-- HMAC-SHA256 key "Jefe" / RFC 4231 case 2's message.
fn main() -> Int {
  let abc = bytes_of_text("abc");
  print("sha1: ${base64_encode(sha1(abc))}");
  print("sha256: ${base64_encode(sha256(abc))}");
  let key = bytes_of_text("Jefe");
  let msg = bytes_of_text("what do ya want for nothing?");
  print("hmac: ${base64_encode(hmac_sha256(key, msg))}");
  return 0;
}