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/*
* Copyright (C) 2020 Square, Inc. and others.
*
* 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
import kotlin.random.Random
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.Parameterized
@RunWith(Parameterized::class)
class CipherSourceTest(private val cipherAlgorithm: CipherAlgorithm) {
companion object {
@get:Parameterized.Parameters(name = "{0}")
@get:JvmStatic
val parameters: List<CipherAlgorithm>
get() = CipherAlgorithm.BLOCK_CIPHER_ALGORITHMS
}
@Test
fun encrypt() {
val random = Random(787679144228763091)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val data = random.nextBytes(32)
val buffer = Buffer().apply { write(data) }
val cipherSource = buffer.cipherSource(cipherFactory.encrypt)
val actualEncryptedData = cipherSource.buffer().use { it.readByteArray() }
val expectedEncryptedData = cipherFactory.encrypt.doFinal(data)
assertArrayEquals(expectedEncryptedData, actualEncryptedData)
}
@Test
fun encryptEmpty() {
val random = Random(1057830944394705953)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val data = ByteArray(0)
val buffer = Buffer()
val cipherSource = buffer.cipherSource(cipherFactory.encrypt)
val actualEncryptedData = cipherSource.buffer().use { it.readByteArray() }
val expectedEncryptedData = cipherFactory.encrypt.doFinal(data)
assertArrayEquals(expectedEncryptedData, actualEncryptedData)
}
@Test
fun encryptLarge() {
val random = Random(8185922876836480815)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val data = random.nextBytes(Segment.SIZE * 16 + Segment.SIZE / 2)
val buffer = Buffer().apply { write(data) }
val cipherSource = buffer.cipherSource(cipherFactory.encrypt)
val actualEncryptedData = cipherSource.buffer().use { it.readByteArray() }
val expectedEncryptedData = cipherFactory.encrypt.doFinal(data)
assertArrayEquals(expectedEncryptedData, actualEncryptedData)
}
@Test
fun encryptSingleByteSource() {
val random = Random(6085265142433950622)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val data = random.nextBytes(32)
val buffer = Buffer().apply { write(data) }
val cipherSource = buffer.emitSingleBytes().cipherSource(cipherFactory.encrypt)
val actualEncryptedData = cipherSource.buffer().use { it.readByteArray() }
val expectedEncryptedData = cipherFactory.encrypt.doFinal(data)
assertArrayEquals(expectedEncryptedData, actualEncryptedData)
}
/** Only relevant for algorithms which handle padding. */
@Test
fun encryptPaddingRequired() {
val random = Random(4190481737015278225)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val blockSize = cipherFactory.blockSize
val dataSize = blockSize * 4 + if (cipherAlgorithm.padding) blockSize / 2 else 0
val data = random.nextBytes(dataSize)
val buffer = Buffer().apply { write(data) }
val cipherSource = buffer.cipherSource(cipherFactory.encrypt)
val actualEncryptedData = cipherSource.buffer().use { it.readByteArray() }
val expectedEncryptedData = cipherFactory.encrypt.doFinal(data)
assertArrayEquals(expectedEncryptedData, actualEncryptedData)
}
@Test
fun decrypt() {
val random = Random(8067587635762239433)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val expectedData = random.nextBytes(32)
val encryptedData = cipherFactory.encrypt.doFinal(expectedData)
val buffer = Buffer().apply { write(encryptedData) }
val cipherSource = buffer.cipherSource(cipherFactory.decrypt)
val actualData = cipherSource.buffer().use { it.readByteArray() }
assertArrayEquals(expectedData, actualData)
}
@Test
fun decryptEmpty() {
val random = Random(8722996896871347396)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val expectedData = ByteArray(0)
val encryptedData = cipherFactory.encrypt.doFinal(expectedData)
val buffer = Buffer().apply { write(encryptedData) }
val cipherSource = buffer.cipherSource(cipherFactory.decrypt)
val actualData = cipherSource.buffer().use { it.readByteArray() }
assertArrayEquals(expectedData, actualData)
}
@Test
fun decryptLarge() {
val random = Random(4007116131070653181)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val expectedData = random.nextBytes(Segment.SIZE * 16 + Segment.SIZE / 2)
val encryptedData = cipherFactory.encrypt.doFinal(expectedData)
val buffer = Buffer().apply { write(encryptedData) }
val cipherSource = buffer.cipherSource(cipherFactory.decrypt)
val actualData = cipherSource.buffer().use { it.readByteArray() }
assertArrayEquals(expectedData, actualData)
}
@Test
fun decryptSingleByteSource() {
val random = Random(1555017938547616655)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val expectedData = random.nextBytes(32)
val encryptedData = cipherFactory.encrypt.doFinal(expectedData)
val buffer = Buffer().apply { write(encryptedData) }
val cipherSource = buffer.emitSingleBytes().cipherSource(cipherFactory.decrypt)
val actualData = cipherSource.buffer().use {
it.readByteArray()
}
assertArrayEquals(expectedData, actualData)
}
/** Only relevant for algorithms which handle padding. */
@Test
fun decryptPaddingRequired() {
val random = Random(5717921427007554469)
val cipherFactory = cipherAlgorithm.createCipherFactory(random)
val blockSize = cipherFactory.blockSize
val dataSize = blockSize * 4 + if (cipherAlgorithm.padding) blockSize / 2 else 0
val expectedData = random.nextBytes(dataSize)
val encryptedData = cipherFactory.encrypt.doFinal(expectedData)
val buffer = Buffer().apply { write(encryptedData) }
val cipherSource = buffer.cipherSource(cipherFactory.decrypt)
val actualData = cipherSource.buffer().use { it.readByteArray() }
assertArrayEquals(expectedData, actualData)
}
private fun Source.emitSingleBytes(): Source =
SingleByteSource(this)
private class SingleByteSource(source: Source) : ForwardingSource(source) {
override fun read(sink: Buffer, byteCount: Long): Long =
delegate.read(sink, 1L)
}
}
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