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/*
* Copyright (C) 2010 The Android Open Source Project
*
* 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 libcore.javax.crypto;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.spec.AlgorithmParameterSpec;
import java.util.Arrays;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import junit.framework.TestCase;
public final class CipherInputStreamTest extends TestCase {
private final byte[] aesKeyBytes = {
(byte) 0x50, (byte) 0x98, (byte) 0xF2, (byte) 0xC3, (byte) 0x85, (byte) 0x23,
(byte) 0xA3, (byte) 0x33, (byte) 0x50, (byte) 0x98, (byte) 0xF2, (byte) 0xC3,
(byte) 0x85, (byte) 0x23, (byte) 0xA3, (byte) 0x33,
};
private final byte[] aesIvBytes = {
(byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
(byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
(byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
};
private final byte[] aesCipherText = {
(byte) 0x2F, (byte) 0x2C, (byte) 0x74, (byte) 0x31, (byte) 0xFF, (byte) 0xCC,
(byte) 0x28, (byte) 0x7D, (byte) 0x59, (byte) 0xBD, (byte) 0xE5, (byte) 0x0A,
(byte) 0x30, (byte) 0x7E, (byte) 0x6A, (byte) 0x4A
};
private final byte[] rc4CipherText = {
(byte) 0x88, (byte) 0x01, (byte) 0xE3, (byte) 0x52, (byte) 0x7B
};
private final String plainText = "abcde";
private SecretKey key;
private SecretKey rc4Key;
private AlgorithmParameterSpec iv;
@Override protected void setUp() throws Exception {
key = new SecretKeySpec(aesKeyBytes, "AES");
rc4Key = new SecretKeySpec(aesKeyBytes, "RC4");
iv = new IvParameterSpec(aesIvBytes);
}
private static class MeasuringInputStream extends FilterInputStream {
private int totalRead;
protected MeasuringInputStream(InputStream in) {
super(in);
}
@Override
public int read() throws IOException {
int c = super.read();
totalRead++;
return c;
}
@Override
public int read(byte[] buffer, int byteOffset, int byteCount) throws IOException {
int numRead = super.read(buffer, byteOffset, byteCount);
if (numRead != -1) {
totalRead += numRead;
}
return numRead;
}
public int getTotalRead() {
return totalRead;
}
}
public void testAvailable() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
MeasuringInputStream in = new MeasuringInputStream(new ByteArrayInputStream(aesCipherText));
InputStream cin = new CipherInputStream(in, cipher);
assertTrue(cin.read() != -1);
assertEquals(aesCipherText.length, in.getTotalRead());
}
public void testDecrypt_NullInput_Discarded() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
InputStream in = new CipherInputStream(new ByteArrayInputStream(aesCipherText), cipher);
int discard = 3;
while (discard != 0) {
discard -= in.read(null, 0, discard);
}
byte[] bytes = readAll(in);
assertEquals(Arrays.toString(plainText.substring(3).getBytes("UTF-8")),
Arrays.toString(bytes));
}
public void testEncrypt() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key, iv);
InputStream in = new CipherInputStream(
new ByteArrayInputStream(plainText.getBytes("UTF-8")), cipher);
byte[] bytes = readAll(in);
assertEquals(Arrays.toString(aesCipherText), Arrays.toString(bytes));
// Reading again shouldn't throw an exception.
assertEquals(-1, in.read());
}
public void testEncrypt_RC4() throws Exception {
Cipher cipher = Cipher.getInstance("RC4");
cipher.init(Cipher.ENCRYPT_MODE, rc4Key);
InputStream in = new CipherInputStream(
new ByteArrayInputStream(plainText.getBytes("UTF-8")), cipher);
byte[] bytes = readAll(in);
assertEquals(Arrays.toString(rc4CipherText), Arrays.toString(bytes));
// Reading again shouldn't throw an exception.
assertEquals(-1, in.read());
}
public void testDecrypt() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
InputStream in = new CipherInputStream(new ByteArrayInputStream(aesCipherText), cipher);
byte[] bytes = readAll(in);
assertEquals(Arrays.toString(plainText.getBytes("UTF-8")), Arrays.toString(bytes));
}
public void testDecrypt_RC4() throws Exception {
Cipher cipher = Cipher.getInstance("RC4");
cipher.init(Cipher.DECRYPT_MODE, rc4Key);
InputStream in = new CipherInputStream(new ByteArrayInputStream(rc4CipherText), cipher);
byte[] bytes = readAll(in);
assertEquals(Arrays.toString(plainText.getBytes("UTF-8")), Arrays.toString(bytes));
}
public void testSkip() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
InputStream in = new CipherInputStream(new ByteArrayInputStream(aesCipherText), cipher);
assertTrue(in.skip(5) >= 0);
}
private byte[] readAll(InputStream in) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
int count;
byte[] buffer = new byte[1024];
while ((count = in.read(buffer)) != -1) {
out.write(buffer, 0, count);
}
return out.toByteArray();
}
public void testCipherInputStream_TruncatedInput_Failure() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
InputStream is = new CipherInputStream(new ByteArrayInputStream(new byte[31]), cipher);
is.read(new byte[4]);
is.close();
}
public void testCipherInputStream_NullInputStream_Failure() throws Exception {
Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
cipher.init(Cipher.DECRYPT_MODE, key, iv);
InputStream is = new CipherInputStream(null, cipher);
try {
is.read();
fail("Expected NullPointerException");
} catch (NullPointerException expected) {
}
byte[] buffer = new byte[128];
try {
is.read(buffer);
fail("Expected NullPointerException");
} catch (NullPointerException expected) {
}
try {
is.read(buffer, 0, buffer.length);
fail("Expected NullPointerException");
} catch (NullPointerException expected) {
}
}
}
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