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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package subtle
// XORBytes sets dst[i] = x[i] ^ y[i] for all i < n = min(len(x), len(y)),
// returning n, the number of bytes written to dst.
// If dst does not have length at least n,
// XORBytes panics without writing anything to dst.
func XORBytes(dst, x, y []byte) int {
n := len(x)
if len(y) < n {
n = len(y)
}
if n == 0 {
return 0
}
if n > len(dst) {
panic("subtle.XORBytes: dst too short")
}
xorBytes(&dst[0], &x[0], &y[0], n) // arch-specific
return n
}
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