a BSD-style // license that can be found in the LICENSE file. package subtle // ConstantTimeCompare returns 1 if the two slices, x and y, have equal contents // and 0 otherwise. The time taken is a function of the length of the slices and // is independent of the contents. If the lengths of x and y do not match it // returns 0 immediately. func ConstantTimeCompare(x, y []byte) int { if len(x) != len(y) { return 0 } var v byte for i := 0; i < len(x); i++ { v |= x[i] ^ y[i] } return ConstantTimeByteEq(v,...