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

Example 21 with CipherParameters

use of org.bouncycastle.crypto.CipherParameters 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 22 with CipherParameters

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

the class PEMInputOutput method derivePrivateKeyPBES2.

private static PrivateKey derivePrivateKeyPBES2(EncryptedPrivateKeyInfo eIn, AlgorithmIdentifier algId, char[] password) throws GeneralSecurityException, InvalidCipherTextException {
    PBES2Parameters pbeParams = PBES2Parameters.getInstance((ASN1Sequence) algId.getParameters());
    CipherParameters cipherParams = extractPBES2CipherParams(password, pbeParams);
    EncryptionScheme scheme = pbeParams.getEncryptionScheme();
    BufferedBlockCipher cipher;
    if (scheme.getAlgorithm().equals(PKCSObjectIdentifiers.RC2_CBC)) {
        RC2CBCParameter rc2Params = RC2CBCParameter.getInstance(scheme);
        byte[] iv = rc2Params.getIV();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new RC2Engine()));
        cipher.init(false, param);
    } else {
        byte[] iv = ASN1OctetString.getInstance(scheme.getParameters()).getOctets();
        CipherParameters param = new ParametersWithIV(cipherParams, iv);
        cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
        cipher.init(false, param);
    }
    byte[] data = eIn.getEncryptedData();
    byte[] out = new byte[cipher.getOutputSize(data.length)];
    int len = cipher.processBytes(data, 0, data.length, out, 0);
    len += cipher.doFinal(out, len);
    byte[] pkcs8 = new byte[len];
    System.arraycopy(out, 0, pkcs8, 0, len);
    // It seems to work for both RSA and DSA.
    KeyFactory fact = SecurityHelper.getKeyFactory("RSA");
    return fact.generatePrivate(new PKCS8EncodedKeySpec(pkcs8));
}

Example 23 with CipherParameters

use of org.bouncycastle.crypto.CipherParameters 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 24 with CipherParameters

use of org.bouncycastle.crypto.CipherParameters 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 25 with CipherParameters

use of org.bouncycastle.crypto.CipherParameters in project nem2-sdk-java by nemtech.

the class AESGCM method createCipher.

/**
 * Creates a new AES cipher.
 *
 * @param secretKey The AES key. Must not be {@code null}.
 * @param forEncryption If {@code true} creates an AES encryption cipher, else creates an AES
 *     decryption cipher.
 * @return The AES cipher.
 */
private static AESEngine createCipher(final byte[] secretKey, final boolean forEncryption) {
    AESEngine cipher = new AESEngine();
    CipherParameters cipherParams = new KeyParameter(secretKey);
    cipher.init(forEncryption, cipherParams);
    return cipher;
}