Examples with PKCS5S2ParametersGenerator org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator used on opensource projects

Example 1 with PKCS5S2ParametersGenerator

use of org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator in project samourai-wallet-android by Samourai-Wallet.

the class AESUtil method decryptWithSetMode.

public static String decryptWithSetMode(String ciphertext, CharSequenceX password, int iterations, int mode, @Nullable BlockCipherPadding padding) throws InvalidCipherTextException, UnsupportedEncodingException, DecryptionException {
    final int AESBlockSize = 4;
    byte[] cipherdata = Base64.decodeBase64(ciphertext.getBytes());
    // Separate 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);
    BlockCipher cipherMode;
    if (mode == MODE_CBC) {
        cipherMode = new CBCBlockCipher(new AESEngine());
    } else {
        // mode == MODE_OFB
        cipherMode = new OFBBlockCipher(new AESEngine(), 128);
    }
    BufferedBlockCipher cipher;
    if (padding != null) {
        cipher = new PaddedBufferedBlockCipher(cipherMode, padding);
    } else {
        cipher = new BufferedBlockCipher(cipherMode);
    }
    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);
    len += cipher.doFinal(buf, len);
    // remove padding
    byte[] out = new byte[len];
    System.arraycopy(buf, 0, out, 0, len);
    // return string representation of decoded bytes
    String result = new String(out, "UTF-8");
    if (result.isEmpty()) {
        throw new DecryptionException("Decrypted string is empty.");
    }
    return result;
}

Example 2 with PKCS5S2ParametersGenerator

use of org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator in project openmeetings by apache.

the class SHA256Implementation method hash.

private static String hash(String str, byte[] salt, int iter) {
    PKCS5S2ParametersGenerator gen = new PKCS5S2ParametersGenerator(new SHA256Digest());
    gen.init(str.getBytes(StandardCharsets.UTF_8), salt, iter);
    byte[] dk = ((KeyParameter) gen.generateDerivedParameters(KEY_LENGTH)).getKey();
    return Base64.encodeBase64String(dk);
}

Example 3 with PKCS5S2ParametersGenerator

use of org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator in project jruby-openssl by jruby.

the class PKCS5 method generatePBEKey.

private static RubyString generatePBEKey(final Ruby runtime, final char[] pass, final byte[] salt, final int iter, final int keySize) {
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(pass), salt, iter);
    CipherParameters params = generator.generateDerivedParameters(keySize * 8);
    return StringHelper.newString(runtime, ((KeyParameter) params).getKey());
}

Example 4 with PKCS5S2ParametersGenerator

use of org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator in project jruby-openssl by jruby.

the class PEMInputOutput method extractPBES2CipherParams.

private static CipherParameters extractPBES2CipherParams(char[] password, PBES2Parameters pbeParams) {
    PBKDF2Params pbkdfParams = PBKDF2Params.getInstance(pbeParams.getKeyDerivationFunc().getParameters());
    int keySize = 192;
    if (pbkdfParams.getKeyLength() != null) {
        keySize = pbkdfParams.getKeyLength().intValue() * 8;
    }
    int iterationCount = pbkdfParams.getIterationCount().intValue();
    byte[] salt = pbkdfParams.getSalt();
    PBEParametersGenerator generator = new PKCS5S2ParametersGenerator();
    generator.init(PBEParametersGenerator.PKCS5PasswordToBytes(password), salt, iterationCount);
    return generator.generateDerivedParameters(keySize);
}

Example 5 with PKCS5S2ParametersGenerator

use of org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator 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;
}