Examples with Cipher javax.crypto.Cipher used on opensource projects

Example 6 with Cipher

use of javax.crypto.Cipher in project UltimateAndroid by cymcsg.

the class TripleDES method decrypt.

/**
     * Decrypt the message with TripleDES
     *
     * @param message
     * @return
     * @throws Exception
     */
public static String decrypt(byte[] message) throws Exception {
    byte[] values = Base64decodingByte(message, 0);
    final MessageDigest md = MessageDigest.getInstance("SHA-1");
    final byte[] digestOfPassword = md.digest(token.getBytes("utf-8"));
    final byte[] keyBytes = copyOf(digestOfPassword, 24);
    for (int j = 0, k = 16; j < 8; ) {
        keyBytes[k++] = keyBytes[j++];
    }
    final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
    String s1 = "12345678";
    byte[] bytes = s1.getBytes();
    final IvParameterSpec iv = new IvParameterSpec(bytes);
    final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    decipher.init(Cipher.DECRYPT_MODE, key, iv);
    final byte[] plainText = decipher.doFinal(values);
    return new String(plainText, "UTF-8");
}

Example 7 with Cipher

use of javax.crypto.Cipher in project UltimateAndroid by cymcsg.

the class TripleDES method decrypt.

/**
     * Decrypt the message with TripleDES
     *
     * @param message
     * @return
     * @throws Exception
     */
public static String decrypt(String message) throws Exception {
    if (message == null || message == "")
        return "";
    byte[] values = Base64decoding(message, 0);
    final MessageDigest md = MessageDigest.getInstance("SHA-1");
    final byte[] digestOfPassword = md.digest(token.getBytes("utf-8"));
    final byte[] keyBytes = copyOf(digestOfPassword, 24);
    for (int j = 0, k = 16; j < 8; ) {
        keyBytes[k++] = keyBytes[j++];
    }
    final SecretKey key = new SecretKeySpec(keyBytes, "DESede");
    String s1 = "12345678";
    byte[] bytes = s1.getBytes();
    final IvParameterSpec iv = new IvParameterSpec(bytes);
    final Cipher decipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
    decipher.init(Cipher.DECRYPT_MODE, key, iv);
    final byte[] plainText = decipher.doFinal(values);
    return new String(plainText, "UTF-8");
}

Example 8 with Cipher

use of javax.crypto.Cipher in project android_frameworks_base by ParanoidAndroid.

the class AndroidKeyStoreTest method testKeyStore_KeyOperations_Wrap_Encrypted_Success.

public void testKeyStore_KeyOperations_Wrap_Encrypted_Success() throws Exception {
    setupPassword();
    mKeyStore.load(null, null);
    setupKey();
    // Test key usage
    Entry e = mKeyStore.getEntry(TEST_ALIAS_1, null);
    assertNotNull(e);
    assertTrue(e instanceof PrivateKeyEntry);
    PrivateKeyEntry privEntry = (PrivateKeyEntry) e;
    PrivateKey privKey = privEntry.getPrivateKey();
    assertNotNull(privKey);
    PublicKey pubKey = privEntry.getCertificate().getPublicKey();
    Cipher c = Cipher.getInstance("RSA/ECB/PKCS1Padding");
    c.init(Cipher.WRAP_MODE, pubKey);
    byte[] expectedKey = new byte[] { 0x00, 0x05, (byte) 0xAA, (byte) 0x0A5, (byte) 0xFF, 0x55, 0x0A };
    SecretKey expectedSecret = new SecretKeySpec(expectedKey, "AES");
    byte[] wrappedExpected = c.wrap(expectedSecret);
    c.init(Cipher.UNWRAP_MODE, privKey);
    SecretKey actualSecret = (SecretKey) c.unwrap(wrappedExpected, "AES", Cipher.SECRET_KEY);
    assertEquals(Arrays.toString(expectedSecret.getEncoded()), Arrays.toString(actualSecret.getEncoded()));
}

Example 9 with Cipher

use of javax.crypto.Cipher in project MSEC by Tencent.

the class Tools method encryptWithPriKey.

public static byte[] encryptWithPriKey(byte[] buf, PrivateKey p) {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    try {
        Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
        cipher.init(Cipher.ENCRYPT_MODE, p);
        return cipher.doFinal(buf);
    } catch (Exception e) {
        e.printStackTrace();
        return new byte[0];
    }
}

Example 10 with Cipher

use of javax.crypto.Cipher in project MSEC by Tencent.

the class Tools method decryptWithPriKey.

public static byte[] decryptWithPriKey(byte[] buf, PublicKey p) {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    try {
        SecureRandom random = new SecureRandom();
        Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
        cipher.init(Cipher.DECRYPT_MODE, p, random);
        return cipher.doFinal(buf);
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}