java - 在单元测试中找不到任何支持 AES/CBC/ISO7816-4Padding 的提供商

Question

我使用 SpongyCaSTLe 来支持 AES/CBC/ISO7816-4Padding 转换。我已在 Android 项目的 build.gradle 文件中包含以下依赖项:

compile "com.madgag.spongycastle:core:1.58.0.0"
compile "com.madgag.spongycastle:prov:1.58.0.0"
compile 'com.madgag.spongycastle:bcpkix-jdk15on:1.58.0.0'

我在 Android 手机上执行加密操作没有任何问题，但我需要通过以下单元测试(这只是一个简单的类，我在其中提取了我必须的实用程序类的主要功能)加密和解密数据，因此请忽略硬编码 key 和 IV)

import static junit.framework.TestCase.assertEquals;

import java.security.GeneralSecurityException;
import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.junit.Test;
import org.spongycastle.jce.provider.BouncyCastleProvider;

public class SpongyTests {

    static {
        Security.insertProviderAt(new BouncyCastleProvider(), 1);
    }

    final static byte[] KEY = {
        0x2b, 0x7e, 0x15, 0x16, 0x28, (byte) 0xae, (byte) 0xd2, (byte) 0xa6,
        (byte) 0xab, (byte) 0xf7, 0x15, (byte) 0x88, 0x09, (byte) 0xcf, 0x4f, 0x3c
    };

    final static byte[] IV = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    @Test
    public void testCryptoOperations() throws GeneralSecurityException {
        String plainData = "This is the confidential information";

        byte[] encryptedData = aesEncrypt(KEY, IV, plainData.getBytes());
        byte[] decryptedData = aesDecrypt(KEY, IV, encryptedData);

        assertEquals(plainData, new String(decryptedData));
    }

    public static byte[] aesEncrypt(byte[] key, byte[] iv, byte[] data) throws
        GeneralSecurityException {
        return symmetricCryptoOperation(Cipher.ENCRYPT_MODE, key, iv, data);
    }

    public static byte[] aesDecrypt(byte[] key, byte[] iv, byte[] data) throws GeneralSecurityException {
        return symmetricCryptoOperation(Cipher.DECRYPT_MODE, key, iv, data);
    }

    private static byte[] symmetricCryptoOperation(int mode, byte[] key, byte[] iv, byte[] data) throws GeneralSecurityException {
        SecretKeySpec keySpec = new SecretKeySpec(key, "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/ISO7816-4Padding");
        cipher.init(mode, keySpec, new IvParameterSpec(iv));
        return cipher.doFinal(data);
    }
}

当我运行上述单元测试时，我收到以下异常:

java.security.NoSuchAlgorithmException: Cannot find any provider supporting AES/CBC/ISO7816-4Padding

    at javax.crypto.Cipher.getInstance(Cipher.java:540)
    at com.yoti.mobile.android.tags.common.SpongyTests.symmetricCryptoOperation(SpongyTests.java:49)
    at com.yoti.mobile.android.tags.common.SpongyTests.aesEncrypt(SpongyTests.java:40)
    at com.yoti.mobile.android.tags.common.SpongyTests.testCryptoOperations(SpongyTests.java:32)

如您所见，我将 BouncyCaSTLeProvider 添加到第一个位置，但它不起作用。知道如何让这个测试通过吗？ :)

Answer 1

尝试改变这一点

static {
    Security.insertProviderAt(new BouncyCastleProvider(), 1);
}

到此

@Before
public void setUp() {
    Security.insertProviderAt(new BouncyCastleProvider(), 1);
}