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Example 1 with OFBBlockCipher

use of org.bouncycastle.crypto.modes.OFBBlockCipher in project robovm by robovm.

the class BaseBlockCipher method engineSetMode.

protected void engineSetMode(String mode) throws NoSuchAlgorithmException {
    modeName = Strings.toUpperCase(mode);
    if (modeName.equals("ECB")) {
        ivLength = 0;
        cipher = new BufferedGenericBlockCipher(baseEngine);
    } else if (modeName.equals("CBC")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new CBCBlockCipher(baseEngine));
    } else if (modeName.startsWith("OFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else if (modeName.startsWith("CFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else // END android-removed
    if (modeName.startsWith("SIC")) {
        ivLength = baseEngine.getBlockSize();
        if (ivLength < 16) {
            throw new IllegalArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
        }
        cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(new SICBlockCipher(baseEngine)));
    } else if (modeName.startsWith("CTR")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(new SICBlockCipher(baseEngine)));
    } else // END android-removed
    if (modeName.startsWith("CTS")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new CTSBlockCipher(new CBCBlockCipher(baseEngine)));
    } else if (modeName.startsWith("CCM")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new AEADGenericBlockCipher(new CCMBlockCipher(baseEngine));
    } else // END android-removed
    if (modeName.startsWith("GCM")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new AEADGenericBlockCipher(new GCMBlockCipher(baseEngine));
    } else {
        throw new NoSuchAlgorithmException("can't support mode " + mode);
    }
}
Also used : OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) CCMBlockCipher(org.bouncycastle.crypto.modes.CCMBlockCipher) SICBlockCipher(org.bouncycastle.crypto.modes.SICBlockCipher) NoSuchAlgorithmException(java.security.NoSuchAlgorithmException) CFBBlockCipher(org.bouncycastle.crypto.modes.CFBBlockCipher) BufferedBlockCipher(org.bouncycastle.crypto.BufferedBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) CTSBlockCipher(org.bouncycastle.crypto.modes.CTSBlockCipher) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) GCMBlockCipher(org.bouncycastle.crypto.modes.GCMBlockCipher)

Example 2 with OFBBlockCipher

use of org.bouncycastle.crypto.modes.OFBBlockCipher 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;
}
Also used : AESEngine(org.bouncycastle.crypto.engines.AESEngine) OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) PKCS5S2ParametersGenerator(org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) BufferedBlockCipher(org.bouncycastle.crypto.BufferedBlockCipher) BlockCipher(org.bouncycastle.crypto.BlockCipher) OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) KeyParameter(org.bouncycastle.crypto.params.KeyParameter) CipherParameters(org.bouncycastle.crypto.CipherParameters) ParametersWithIV(org.bouncycastle.crypto.params.ParametersWithIV) BufferedBlockCipher(org.bouncycastle.crypto.BufferedBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) PBEParametersGenerator(org.bouncycastle.crypto.PBEParametersGenerator)

Example 3 with OFBBlockCipher

use of org.bouncycastle.crypto.modes.OFBBlockCipher in project rxlib by RockyLOMO.

the class AesCrypt method getCipher.

@Override
protected StreamBlockCipher getCipher(boolean isEncrypted) throws InvalidAlgorithmParameterException {
    AESFastEngine engine = new AESFastEngine();
    StreamBlockCipher cipher;
    if (_name.equals(CIPHER_AES_128_CFB)) {
        cipher = new CFBBlockCipher(engine, getIVLength() * 8);
    } else if (_name.equals(CIPHER_AES_192_CFB)) {
        cipher = new CFBBlockCipher(engine, getIVLength() * 8);
    } else if (_name.equals(CIPHER_AES_256_CFB)) {
        cipher = new CFBBlockCipher(engine, getIVLength() * 8);
    } else if (_name.equals(CIPHER_AES_128_OFB)) {
        cipher = new OFBBlockCipher(engine, getIVLength() * 8);
    } else if (_name.equals(CIPHER_AES_192_OFB)) {
        cipher = new OFBBlockCipher(engine, getIVLength() * 8);
    } else if (_name.equals(CIPHER_AES_256_OFB)) {
        cipher = new OFBBlockCipher(engine, getIVLength() * 8);
    } else {
        throw new InvalidAlgorithmParameterException(_name);
    }
    return cipher;
}
Also used : StreamBlockCipher(org.bouncycastle.crypto.StreamBlockCipher) OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) CFBBlockCipher(org.bouncycastle.crypto.modes.CFBBlockCipher) InvalidAlgorithmParameterException(java.security.InvalidAlgorithmParameterException) AESFastEngine(org.bouncycastle.crypto.engines.AESFastEngine)

Example 4 with OFBBlockCipher

use of org.bouncycastle.crypto.modes.OFBBlockCipher in project keepass2android by PhilippC.

the class JCEBlockCipher method engineSetMode.

protected void engineSetMode(String mode) throws NoSuchAlgorithmException {
    modeName = Strings.toUpperCase(mode);
    if (modeName.equals("ECB")) {
        ivLength = 0;
        cipher = new BufferedGenericBlockCipher(baseEngine);
    } else if (modeName.equals("CBC")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new CBCBlockCipher(baseEngine));
    } else if (modeName.startsWith("OFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else if (modeName.startsWith("CFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else /*
        else if (modeName.startsWith("PGP"))
        {
            boolean inlineIV = modeName.equalsIgnoreCase("PGPCFBwithIV");

            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedGenericBlockCipher(
                new PGPCFBBlockCipher(baseEngine, inlineIV));
        }
        else if (modeName.equalsIgnoreCase("OpenPGPCFB"))
        {
            ivLength = 0;
            cipher = new BufferedGenericBlockCipher(
                new OpenPGPCFBBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("SIC"))
        {
            ivLength = baseEngine.getBlockSize();
            if (ivLength < 16)
            {
                throw new IllegalArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
            }
            cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine)));
        }
        else if (modeName.startsWith("CTR"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(
                        new SICBlockCipher(baseEngine)));
        }
        else if (modeName.startsWith("GOFB"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(
                        new GOFBBlockCipher(baseEngine)));
        }
        else if (modeName.startsWith("CTS"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new BufferedGenericBlockCipher(new CTSBlockCipher(new CBCBlockCipher(baseEngine)));
        }
        else if (modeName.startsWith("CCM"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new AEADGenericBlockCipher(new CCMBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("EAX"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new AEADGenericBlockCipher(new EAXBlockCipher(baseEngine));
        }
        else if (modeName.startsWith("GCM"))
        {
            ivLength = baseEngine.getBlockSize();
            cipher = new AEADGenericBlockCipher(new GCMBlockCipher(baseEngine));
        }
        */
    {
        throw new NoSuchAlgorithmException("can't support mode " + mode);
    }
}
Also used : OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) CFBBlockCipher(org.bouncycastle.crypto.modes.CFBBlockCipher) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) NoSuchAlgorithmException(java.security.NoSuchAlgorithmException)

Example 5 with OFBBlockCipher

use of org.bouncycastle.crypto.modes.OFBBlockCipher in project XobotOS by xamarin.

the class JCEBlockCipher method engineSetMode.

protected void engineSetMode(String mode) throws NoSuchAlgorithmException {
    modeName = Strings.toUpperCase(mode);
    if (modeName.equals("ECB")) {
        ivLength = 0;
        cipher = new BufferedGenericBlockCipher(baseEngine);
    } else if (modeName.equals("CBC")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new CBCBlockCipher(baseEngine));
    } else if (modeName.startsWith("OFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new OFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else if (modeName.startsWith("CFB")) {
        ivLength = baseEngine.getBlockSize();
        if (modeName.length() != 3) {
            int wordSize = Integer.parseInt(modeName.substring(3));
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, wordSize));
        } else {
            cipher = new BufferedGenericBlockCipher(new CFBBlockCipher(baseEngine, 8 * baseEngine.getBlockSize()));
        }
    } else // END android-removed
    if (modeName.startsWith("SIC")) {
        ivLength = baseEngine.getBlockSize();
        if (ivLength < 16) {
            throw new IllegalArgumentException("Warning: SIC-Mode can become a twotime-pad if the blocksize of the cipher is too small. Use a cipher with a block size of at least 128 bits (e.g. AES)");
        }
        cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(new SICBlockCipher(baseEngine)));
    } else if (modeName.startsWith("CTR")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(new SICBlockCipher(baseEngine)));
    } else if (modeName.startsWith("GOFB")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new BufferedBlockCipher(new GOFBBlockCipher(baseEngine)));
    } else if (modeName.startsWith("CTS")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new BufferedGenericBlockCipher(new CTSBlockCipher(new CBCBlockCipher(baseEngine)));
    } else if (modeName.startsWith("CCM")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new AEADGenericBlockCipher(new CCMBlockCipher(baseEngine));
    } else // END android-removed
    if (modeName.startsWith("GCM")) {
        ivLength = baseEngine.getBlockSize();
        cipher = new AEADGenericBlockCipher(new GCMBlockCipher(baseEngine));
    } else {
        throw new NoSuchAlgorithmException("can't support mode " + mode);
    }
}
Also used : GOFBBlockCipher(org.bouncycastle.crypto.modes.GOFBBlockCipher) OFBBlockCipher(org.bouncycastle.crypto.modes.OFBBlockCipher) CCMBlockCipher(org.bouncycastle.crypto.modes.CCMBlockCipher) SICBlockCipher(org.bouncycastle.crypto.modes.SICBlockCipher) NoSuchAlgorithmException(java.security.NoSuchAlgorithmException) CFBBlockCipher(org.bouncycastle.crypto.modes.CFBBlockCipher) BufferedBlockCipher(org.bouncycastle.crypto.BufferedBlockCipher) PaddedBufferedBlockCipher(org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher) CTSBlockCipher(org.bouncycastle.crypto.modes.CTSBlockCipher) CBCBlockCipher(org.bouncycastle.crypto.modes.CBCBlockCipher) GOFBBlockCipher(org.bouncycastle.crypto.modes.GOFBBlockCipher) GCMBlockCipher(org.bouncycastle.crypto.modes.GCMBlockCipher)

Aggregations

OFBBlockCipher (org.bouncycastle.crypto.modes.OFBBlockCipher)6 CBCBlockCipher (org.bouncycastle.crypto.modes.CBCBlockCipher)5 BufferedBlockCipher (org.bouncycastle.crypto.BufferedBlockCipher)4 CFBBlockCipher (org.bouncycastle.crypto.modes.CFBBlockCipher)4 PaddedBufferedBlockCipher (org.bouncycastle.crypto.paddings.PaddedBufferedBlockCipher)4 NoSuchAlgorithmException (java.security.NoSuchAlgorithmException)3 BlockCipher (org.bouncycastle.crypto.BlockCipher)2 CipherParameters (org.bouncycastle.crypto.CipherParameters)2 PBEParametersGenerator (org.bouncycastle.crypto.PBEParametersGenerator)2 AESEngine (org.bouncycastle.crypto.engines.AESEngine)2 PKCS5S2ParametersGenerator (org.bouncycastle.crypto.generators.PKCS5S2ParametersGenerator)2 CCMBlockCipher (org.bouncycastle.crypto.modes.CCMBlockCipher)2 CTSBlockCipher (org.bouncycastle.crypto.modes.CTSBlockCipher)2 GCMBlockCipher (org.bouncycastle.crypto.modes.GCMBlockCipher)2 SICBlockCipher (org.bouncycastle.crypto.modes.SICBlockCipher)2 KeyParameter (org.bouncycastle.crypto.params.KeyParameter)2 ParametersWithIV (org.bouncycastle.crypto.params.ParametersWithIV)2 InvalidAlgorithmParameterException (java.security.InvalidAlgorithmParameterException)1 SecureRandom (java.security.SecureRandom)1 StreamBlockCipher (org.bouncycastle.crypto.StreamBlockCipher)1