in src/main/java/com/amazonaws/encryptionsdk/internal/Utils.java [315:325]
public static boolean arrayPrefixEquals(final byte[] a, final byte[] b, final int length) {
if (a == null || b == null || a.length < length || b.length < length) {
return false;
}
for (int x = 0; x < length; x++) {
if (a[x] != b[x]) {
return false;
}
}
return true;
}