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/*
* Copyright (C) 2020 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package okio.internal
import okio.ByteString
import org.junit.Assert.assertArrayEquals
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.Parameterized
import javax.crypto.Mac
import javax.crypto.spec.SecretKeySpec
import kotlin.random.Random
/**
* Check the [Hmac] implementation against the reference [Mac] JVM implementation.
*/
@RunWith(Parameterized::class)
class HmacTest(val parameters: Parameters) {
companion object {
@get:Parameterized.Parameters(name = "{0}")
@get:JvmStatic
val parameters: List<Parameters>
get() {
val algorithms = enumValues<Parameters.Algorithm>()
val keySizes = listOf(8, 32, 48, 64, 128, 256)
val dataSizes = listOf(0, 32, 64, 128, 256, 512)
return algorithms.flatMap { algorithm ->
keySizes.flatMap { keySize ->
dataSizes.map { dataSize ->
Parameters(
algorithm,
keySize,
dataSize
)
}
}
}
}
}
private val keySize
get() = parameters.keySize
private val dataSize
get() = parameters.dataSize
private val algorithm
get() = parameters.algorithmName
private val random = Random(682741861446)
private val key = random.nextBytes(keySize)
private val bytes = random.nextBytes(dataSize)
private val mac = parameters.createMac(key)
private val expected = hmac(algorithm, key, bytes)
@Test
fun hmac() {
mac.update(bytes)
val hmacValue = mac.digest()
assertArrayEquals(expected, hmacValue)
}
@Test
fun hmacBytes() {
for (byte in bytes) {
mac.update(byteArrayOf(byte))
}
val hmacValue = mac.digest()
assertArrayEquals(expected, hmacValue)
}
data class Parameters(
val algorithm: Algorithm,
val keySize: Int,
val dataSize: Int
) {
val algorithmName
get() = algorithm.algorithmName
internal fun createMac(key: ByteArray) =
algorithm.HmacFactory(ByteString(key))
enum class Algorithm(
val algorithmName: String,
internal val HmacFactory: (key: ByteString) -> Hmac
) {
SHA_1("HmacSha1", Hmac.Companion::sha1),
SHA_256("HmacSha256", Hmac.Companion::sha256),
SHA_512("HmacSha512", Hmac.Companion::sha512),
}
}
}
private fun hmac(algorithm: String, key: ByteArray, bytes: ByteArray) =
Mac.getInstance(algorithm).apply { init(SecretKeySpec(key, algorithm)) }.doFinal(bytes)
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