use of com.github.zhenwei.core.crypto.paddings.PaddedBufferedBlockCipher in project LinLong-Java by zhenwei1108.
the class DESExample method process.
private void process() {
/*
* Setup the DESede cipher engine, create a PaddedBufferedBlockCipher
* in CBC mode.
*/
cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new DESedeEngine()));
if (encrypt) {
performEncrypt(key);
} else {
performDecrypt(key);
}
// after processing clean up the files
try {
in.close();
out.flush();
out.close();
} catch (IOException closing) {
System.err.println("exception closing resources: " + closing.getMessage());
}
}
use of com.github.zhenwei.core.crypto.paddings.PaddedBufferedBlockCipher in project LinLong-Java by zhenwei1108.
the class BcPKCS12PBEInputDecryptorProviderBuilder method build.
public InputDecryptorProvider build(final char[] password) {
return new InputDecryptorProvider() {
public InputDecryptor get(final AlgorithmIdentifier algorithmIdentifier) {
final PaddedBufferedBlockCipher engine = PKCS12PBEUtils.getEngine(algorithmIdentifier.getAlgorithm());
PKCS12PBEParams pbeParams = PKCS12PBEParams.getInstance(algorithmIdentifier.getParameters());
CipherParameters params = PKCS12PBEUtils.createCipherParameters(algorithmIdentifier.getAlgorithm(), digest, engine.getBlockSize(), pbeParams, password);
engine.init(false, params);
return new InputDecryptor() {
public AlgorithmIdentifier getAlgorithmIdentifier() {
return algorithmIdentifier;
}
public InputStream getInputStream(InputStream input) {
return new CipherInputStream(input, engine);
}
public GenericKey getKey() {
return new GenericKey(PKCS12ParametersGenerator.PKCS12PasswordToBytes(password));
}
};
}
};
}
use of com.github.zhenwei.core.crypto.paddings.PaddedBufferedBlockCipher in project LinLong-Java by zhenwei1108.
the class PEMUtilities method crypt.
static byte[] crypt(boolean encrypt, byte[] bytes, char[] password, String dekAlgName, byte[] iv) throws PEMException {
byte[] ivValue = iv;
String blockMode = "CBC";
BlockCipher engine;
BlockCipherPadding padding = new PKCS7Padding();
KeyParameter sKey;
// Figure out block mode and padding.
if (dekAlgName.endsWith("-CFB")) {
blockMode = "CFB";
padding = null;
}
if (dekAlgName.endsWith("-ECB") || "DES-EDE".equals(dekAlgName) || "DES-EDE3".equals(dekAlgName)) {
// ECB is actually the default (though seldom used) when OpenSSL
// uses DES-EDE (des2) or DES-EDE3 (des3).
blockMode = "ECB";
ivValue = null;
}
if (dekAlgName.endsWith("-OFB")) {
blockMode = "OFB";
padding = null;
}
// Figure out algorithm and key size.
if (dekAlgName.startsWith("DES-EDE")) {
// "DES-EDE" is actually des2 in OpenSSL-speak!
// "DES-EDE3" is des3.
boolean des2 = !dekAlgName.startsWith("DES-EDE3");
sKey = getKey(password, 24, iv, des2);
engine = new DESedeEngine();
} else if (dekAlgName.startsWith("DES-")) {
sKey = getKey(password, 8, iv);
engine = new DESEngine();
} else if (dekAlgName.startsWith("BF-")) {
sKey = getKey(password, 16, iv);
engine = new BlowfishEngine();
} else if (dekAlgName.startsWith("RC2-")) {
int keyBits = 128;
if (dekAlgName.startsWith("RC2-40-")) {
keyBits = 40;
} else if (dekAlgName.startsWith("RC2-64-")) {
keyBits = 64;
}
sKey = new RC2Parameters(getKey(password, keyBits / 8, iv).getKey(), keyBits);
;
engine = new RC2Engine();
} else if (dekAlgName.startsWith("AES-")) {
byte[] salt = iv;
if (salt.length > 8) {
salt = new byte[8];
System.arraycopy(iv, 0, salt, 0, 8);
}
int keyBits;
if (dekAlgName.startsWith("AES-128-")) {
keyBits = 128;
} else if (dekAlgName.startsWith("AES-192-")) {
keyBits = 192;
} else if (dekAlgName.startsWith("AES-256-")) {
keyBits = 256;
} else {
throw new EncryptionException("unknown AES encryption with private key: " + dekAlgName);
}
sKey = getKey(password, keyBits / 8, salt);
engine = new AESEngine();
} else {
throw new EncryptionException("unknown encryption with private key: " + dekAlgName);
}
if (blockMode.equals("CBC")) {
engine = new CBCBlockCipher(engine);
} else if (blockMode.equals("CFB")) {
engine = new CFBBlockCipher(engine, engine.getBlockSize() * 8);
} else if (blockMode.equals("OFB")) {
engine = new OFBBlockCipher(engine, engine.getBlockSize() * 8);
}
try {
BufferedBlockCipher c;
if (padding == null) {
c = new BufferedBlockCipher(engine);
} else {
c = new PaddedBufferedBlockCipher(engine, padding);
}
if (// ECB block mode
ivValue == null) {
c.init(encrypt, sKey);
} else {
c.init(encrypt, new ParametersWithIV(sKey, ivValue));
}
byte[] out = new byte[c.getOutputSize(bytes.length)];
int procLen = c.processBytes(bytes, 0, bytes.length, out, 0);
procLen += c.doFinal(out, procLen);
if (procLen == out.length) {
return out;
} else {
byte[] rv = new byte[procLen];
System.arraycopy(out, 0, rv, 0, procLen);
return rv;
}
} catch (Exception e) {
throw new EncryptionException("exception using cipher - please check password and data.", e);
}
}
use of com.github.zhenwei.core.crypto.paddings.PaddedBufferedBlockCipher in project LinLong-Java by zhenwei1108.
the class BrokenJCEBlockCipher method engineSetMode.
protected void engineSetMode(String mode) {
String modeName = Strings.toUpperCase(mode);
if (modeName.equals("ECB")) {
ivLength = 0;
cipher = new PaddedBufferedBlockCipher(cipher.getUnderlyingCipher());
} else if (modeName.equals("CBC")) {
ivLength = cipher.getUnderlyingCipher().getBlockSize();
cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(cipher.getUnderlyingCipher()));
} else if (modeName.startsWith("OFB")) {
ivLength = cipher.getUnderlyingCipher().getBlockSize();
if (modeName.length() != 3) {
int wordSize = Integer.parseInt(modeName.substring(3));
cipher = new PaddedBufferedBlockCipher(new OFBBlockCipher(cipher.getUnderlyingCipher(), wordSize));
} else {
cipher = new PaddedBufferedBlockCipher(new OFBBlockCipher(cipher.getUnderlyingCipher(), 8 * cipher.getBlockSize()));
}
} else if (modeName.startsWith("CFB")) {
ivLength = cipher.getUnderlyingCipher().getBlockSize();
if (modeName.length() != 3) {
int wordSize = Integer.parseInt(modeName.substring(3));
cipher = new PaddedBufferedBlockCipher(new CFBBlockCipher(cipher.getUnderlyingCipher(), wordSize));
} else {
cipher = new PaddedBufferedBlockCipher(new CFBBlockCipher(cipher.getUnderlyingCipher(), 8 * cipher.getBlockSize()));
}
} else {
throw new IllegalArgumentException("can't support mode " + mode);
}
}
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