Examples with PBEParametersGenerator org.bouncycastle.crypto.PBEParametersGenerator used on opensource projects

Example 6 with PBEParametersGenerator

use of org.bouncycastle.crypto.PBEParametersGenerator in project vsDiaryWriter by shilongdai.

the class BCPCKDF2Generator method generate.

@Override
public byte[] generate(String password, int length) {
    PBEParametersGenerator gen = new PKCS12ParametersGenerator(digester);
    gen.init(PBEParametersGenerator.PKCS12PasswordToBytes(password.toCharArray()), salt, iteration);
    KeyParameter param = (KeyParameter) gen.generateDerivedParameters(length);
    return param.getKey();
}

Example 7 with PBEParametersGenerator

use of org.bouncycastle.crypto.PBEParametersGenerator in project sentinel-android by Samourai-Wallet.

the class AESUtil method decrypt.

// AES 256 PBKDF2 CBC iso10126 decryption
// 16 byte IV must be prepended to ciphertext - Compatible with crypto-js
public static String decrypt(String ciphertext, CharSequenceX password, int iterations) {
    final int AESBlockSize = 4;
    byte[] cipherdata = Base64.decodeBase64(ciphertext.getBytes());
    // Seperate the IV and cipher data
    byte[] iv = copyOfRange(cipherdata, 0, AESBlockSize * 4);
    byte[] input = copyOfRange(cipherdata, AESBlockSize * 4, cipherdata.length);
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password.toString().toCharArray()), iv, iterations);
    KeyParameter keyParam = (KeyParameter) generator.generateDerivedParameters(256);
    CipherParameters params = new ParametersWithIV(keyParam, iv);
    // setup AES cipher in CBC mode with PKCS7 padding
    BlockCipherPadding padding = new ISO10126d2Padding();
    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), padding);
    cipher.reset();
    cipher.init(false, params);
    // create a temporary buffer to decode into (includes padding)
    byte[] buf = new byte[cipher.getOutputSize(input.length)];
    int len = cipher.processBytes(input, 0, input.length, buf, 0);
    try {
        len += cipher.doFinal(buf, len);
    } catch (InvalidCipherTextException icte) {
        icte.printStackTrace();
        return null;
    }
    // remove padding
    byte[] out = new byte[len];
    System.arraycopy(buf, 0, out, 0, len);
    // return string representation of decoded bytes
    String ret = null;
    try {
        ret = new String(out, "UTF-8");
    } catch (UnsupportedEncodingException uee) {
        uee.printStackTrace();
        return null;
    }
    return ret;
}

Example 8 with PBEParametersGenerator

use of org.bouncycastle.crypto.PBEParametersGenerator in project sentinel-android by Samourai-Wallet.

the class AESUtil method encrypt.

public static String encrypt(String cleartext, CharSequenceX password, int iterations) {
    final int AESBlockSize = 4;
    if (password == null) {
        return null;
    }
    // Use secure random to generate a 16 byte iv
    SecureRandom random = new SecureRandom();
    byte[] iv = new byte[AESBlockSize * 4];
    random.nextBytes(iv);
    byte[] clearbytes = null;
    try {
        clearbytes = cleartext.getBytes("UTF-8");
    } catch (UnsupportedEncodingException uee) {
        uee.printStackTrace();
        return null;
    }
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToUTF8Bytes(password.toString().toCharArray()), iv, iterations);
    KeyParameter keyParam = (KeyParameter) generator.generateDerivedParameters(256);
    CipherParameters params = new ParametersWithIV(keyParam, iv);
    // setup AES cipher in CBC mode with PKCS7 padding
    BlockCipherPadding padding = new ISO10126d2Padding();
    BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), padding);
    cipher.reset();
    cipher.init(true, params);
    byte[] outBuf = cipherData(cipher, clearbytes);
    // Append to IV to the output
    int len1 = iv.length;
    int len2 = outBuf.length;
    byte[] ivAppended = new byte[len1 + len2];
    System.arraycopy(iv, 0, ivAppended, 0, len1);
    System.arraycopy(outBuf, 0, ivAppended, len1, len2);
    byte[] raw = Base64.encodeBase64(ivAppended);
    String ret = new String(raw);
    return ret;
}

Example 9 with PBEParametersGenerator

use of org.bouncycastle.crypto.PBEParametersGenerator in project XobotOS by xamarin.

the class JDKKeyStore method engineStore.

public void engineStore(OutputStream stream, char[] password) throws IOException {
    DataOutputStream dOut = new DataOutputStream(stream);
    byte[] salt = new byte[STORE_SALT_SIZE];
    int iterationCount = MIN_ITERATIONS + (random.nextInt() & 0x3ff);
    random.nextBytes(salt);
    dOut.writeInt(STORE_VERSION);
    dOut.writeInt(salt.length);
    dOut.write(salt);
    dOut.writeInt(iterationCount);
    // BEGIN android-changed
    HMac hMac = new HMac(new OpenSSLDigest.SHA1());
    MacOutputStream mOut = new MacOutputStream(dOut, hMac);
    PBEParametersGenerator pbeGen = new PKCS12ParametersGenerator(new OpenSSLDigest.SHA1());
    // END android-changed
    byte[] passKey = PBEParametersGenerator.PKCS12PasswordToBytes(password);
    pbeGen.init(passKey, salt, iterationCount);
    hMac.init(pbeGen.generateDerivedMacParameters(hMac.getMacSize()));
    for (int i = 0; i != passKey.length; i++) {
        passKey[i] = 0;
    }
    saveStore(mOut);
    byte[] mac = new byte[hMac.getMacSize()];
    hMac.doFinal(mac, 0);
    dOut.write(mac);
    dOut.close();
}

Example 10 with PBEParametersGenerator

use of org.bouncycastle.crypto.PBEParametersGenerator in project XobotOS by xamarin.

the class PEMUtilities method generateSecretKeyForPKCS5Scheme2.

static SecretKey generateSecretKeyForPKCS5Scheme2(String algorithm, char[] password, byte[] salt, int iterationCount) {
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(password), salt, iterationCount);
    return new SecretKeySpec(((KeyParameter) generator.generateDerivedParameters(PEMUtilities.getKeySize(algorithm))).getKey(), algorithm);
}