List of usage examples for org.bouncycastle.crypto.paddings PaddedBufferedBlockCipher PaddedBufferedBlockCipher
public PaddedBufferedBlockCipher(BlockCipher cipher)
From source file:heat.crypto.Crypto.java
License:Open Source License
public static byte[] aesEncrypt(byte[] plaintext, byte[] myPrivateKey, byte[] theirPublicKey, byte[] nonce) { try {//from w w w. j a va2s.c o m byte[] dhSharedSecret = new byte[32]; Curve25519.curve(dhSharedSecret, myPrivateKey, theirPublicKey); for (int i = 0; i < 32; i++) { dhSharedSecret[i] ^= nonce[i]; } byte[] key = sha256().digest(dhSharedSecret); byte[] iv = new byte[16]; secureRandom.get().nextBytes(iv); PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine())); CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv); aes.init(true, ivAndKey); byte[] output = new byte[aes.getOutputSize(plaintext.length)]; int ciphertextLength = aes.processBytes(plaintext, 0, plaintext.length, output, 0); ciphertextLength += aes.doFinal(output, ciphertextLength); byte[] result = new byte[iv.length + ciphertextLength]; System.arraycopy(iv, 0, result, 0, iv.length); System.arraycopy(output, 0, result, iv.length, ciphertextLength); return result; } catch (InvalidCipherTextException e) { throw new RuntimeException(e.getMessage(), e); } }
From source file:heat.crypto.Crypto.java
License:Open Source License
public static byte[] aesDecrypt(byte[] ivCiphertext, byte[] myPrivateKey, byte[] theirPublicKey, byte[] nonce) { try {//from w ww . ja v a 2 s. c o m if (ivCiphertext.length < 16 || ivCiphertext.length % 16 != 0) { throw new InvalidCipherTextException("invalid ciphertext"); } byte[] iv = Arrays.copyOfRange(ivCiphertext, 0, 16); byte[] ciphertext = Arrays.copyOfRange(ivCiphertext, 16, ivCiphertext.length); byte[] dhSharedSecret = new byte[32]; Curve25519.curve(dhSharedSecret, myPrivateKey, theirPublicKey); for (int i = 0; i < 32; i++) { dhSharedSecret[i] ^= nonce[i]; } byte[] key = sha256().digest(dhSharedSecret); PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine())); CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv); aes.init(false, ivAndKey); byte[] output = new byte[aes.getOutputSize(ciphertext.length)]; int plaintextLength = aes.processBytes(ciphertext, 0, ciphertext.length, output, 0); plaintextLength += aes.doFinal(output, plaintextLength); byte[] result = new byte[plaintextLength]; System.arraycopy(output, 0, result, 0, result.length); return result; } catch (InvalidCipherTextException e) { throw new RuntimeException(e.getMessage(), e); } }
From source file:net.sf.jsignpdf.JSignEncryptor.java
License:Mozilla Public License
/** * Initialize the cryptographic engine./*from w ww .jav a2 s . co m*/ * * @param aKey */ public JSignEncryptor(final byte[] aKey) { cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new BlowfishEngine())); key = new KeyParameter(aKey); }
From source file:org.bigmouth.nvwa.utils.degist.AesUtils.java
License:Apache License
/** * Encrypt data.//from w ww .j a v a2 s .c o m * * @param plain * @param key * @param iv * @return * @throws Exception */ public static byte[] encrypt(byte[] plain, byte[] key, byte[] iv) throws Exception { PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine())); CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv); aes.init(true, ivAndKey); return cipherData(aes, plain); }
From source file:org.bigmouth.nvwa.utils.degist.AesUtils.java
License:Apache License
/** * Decrypt data./* ww w . j a v a 2s . c om*/ * * @param cipher * @param key * @param iv * @return * @throws Exception */ public static byte[] decrypt(byte[] cipher, byte[] key, byte[] iv) throws Exception { PaddedBufferedBlockCipher aes = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine())); CipherParameters ivAndKey = new ParametersWithIV(new KeyParameter(key), iv); aes.init(false, ivAndKey); return cipherData(aes, cipher); }
From source file:org.jruby.ext.openssl.x509store.PEMInputOutput.java
License:LGPL
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;/*ww w. java 2 s . co m*/ 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) scheme.getObject()).getOctets(); // this version, done for BC 1.49 compat, caused #1238. // byte[] iv = ASN1OctetString.getInstance(scheme).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); KeyFactory fact = KeyFactory.getInstance("RSA"); // It seems to work for both RSA and DSA. return fact.generatePrivate(new PKCS8EncodedKeySpec(pkcs8)); }
From source file:org.ScripterRon.BitcoinCore.EncryptedPrivateKey.java
License:Apache License
/** * Create a new EncryptedPrivateKey using the supplied private key and key phrase * * @param privKey Private key * @param keyPhrase Phrase used to derive the encryption key * @throws ECException Unable to complete a cryptographic function *///from www. j a va2 s . com public EncryptedPrivateKey(BigInteger privKey, String keyPhrase) throws ECException { // // Derive the AES encryption key // salt = new byte[KEY_LENGTH]; secureRandom.nextBytes(salt); KeyParameter aesKey = deriveKey(keyPhrase, salt); // // Encrypt the private key using the generated AES key // try { iv = new byte[BLOCK_LENGTH]; secureRandom.nextBytes(iv); ParametersWithIV keyWithIV = new ParametersWithIV(aesKey, iv); CBCBlockCipher blockCipher = new CBCBlockCipher(new AESFastEngine()); BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(blockCipher); cipher.init(true, keyWithIV); byte[] privKeyBytes = privKey.toByteArray(); int encryptedLength = cipher.getOutputSize(privKeyBytes.length); encKeyBytes = new byte[encryptedLength]; int length = cipher.processBytes(privKeyBytes, 0, privKeyBytes.length, encKeyBytes, 0); cipher.doFinal(encKeyBytes, length); } catch (Exception exc) { throw new ECException("Unable to encrypt the private key", exc); } }
From source file:org.ScripterRon.BitcoinCore.EncryptedPrivateKey.java
License:Apache License
/** * Returns the decrypted private key//from w ww. jav a 2 s .co m * * @param keyPhrase Key phrase used to derive the encryption key * @return Private key * @throws ECException Unable to complete a cryptographic function */ public BigInteger getPrivKey(String keyPhrase) throws ECException { KeyParameter aesKey = deriveKey(keyPhrase, salt); // // Decrypt the private key using the generated AES key // BigInteger privKey; try { ParametersWithIV keyWithIV = new ParametersWithIV(aesKey, iv); CBCBlockCipher blockCipher = new CBCBlockCipher(new AESFastEngine()); BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(blockCipher); cipher.init(false, keyWithIV); int bufferLength = cipher.getOutputSize(encKeyBytes.length); byte[] outputBytes = new byte[bufferLength]; int length1 = cipher.processBytes(encKeyBytes, 0, encKeyBytes.length, outputBytes, 0); int length2 = cipher.doFinal(outputBytes, length1); int actualLength = length1 + length2; byte[] privKeyBytes = new byte[actualLength]; System.arraycopy(outputBytes, 0, privKeyBytes, 0, actualLength); privKey = new BigInteger(privKeyBytes); } catch (Exception exc) { throw new ECException("Unable to decrypt the private key", exc); } return privKey; }
From source file:org.sejda.sambox.encryption.ConcatenatingAESEngine.java
License:Apache License
ConcatenatingAESEngine() {
super(new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine())));
random = new SecureRandom();
}
From source file:org.sejda.sambox.pdmodel.encryption.SecurityHandler.java
License:Apache License
/** * Encrypt or decrypt data with AES256.//w ww . j a v a 2 s . c o m * * @param data The data to encrypt. * @param output The output to write the encrypted data to. * * @throws IOException If there is an error reading the data. */ private void decryptDataAES256(InputStream data, OutputStream output) throws IOException { byte[] iv = new byte[16]; // read IV from stream int ivSize = data.read(iv); if (ivSize == -1) { return; } if (ivSize != iv.length) { throw new IOException("AES initialization vector not fully read: only " + ivSize + " bytes read instead of " + iv.length); } PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine())); cipher.init(false, new ParametersWithIV(new KeyParameter(encryptionKey), iv)); try (CipherInputStream cis = new CipherInputStream(data, cipher)) { org.apache.commons.io.IOUtils.copy(cis, output); } }