Examples with ISO10126d2Padding org.bouncycastle.crypto.paddings.ISO10126d2Padding used on opensource projects

Example 1 with ISO10126d2Padding

use of org.bouncycastle.crypto.paddings.ISO10126d2Padding 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 2 with ISO10126d2Padding

use of org.bouncycastle.crypto.paddings.ISO10126d2Padding 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;
}