def r_key

bend-collections-laws-crypto@1.0.0.0 · src/crypto/poly1305/poly1305.bend:53

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/poly1305/limbs.bend as L

53# r = clamp(key[0..16]) and s = key[16..32], as limbs.
54def r_key(+key: List<&2, U32>) -> List<&2, U32>:
55  L.fit(16n, mask(clamp(L.take(16n, key), 0n)))