use of com.unboundid.asn1.ASN1Null in project LinLong-Java by zhenwei1108.
the class CipherFactory method createContentCipher.
/**
* Create a content cipher for encrypting bulk data.
*
* @param forEncryption true if the cipher is for encryption, false otherwise.
* @param encKey the basic key to use.
* @param encryptionAlgID identifying algorithm OID and parameters to use.
* @return a StreamCipher or a BufferedBlockCipher depending on the algorithm.
* @throws IllegalArgumentException
*/
public static Object createContentCipher(boolean forEncryption, CipherParameters encKey, AlgorithmIdentifier encryptionAlgID) throws IllegalArgumentException {
ASN1ObjectIdentifier encAlg = encryptionAlgID.getAlgorithm();
if (encAlg.equals(PKCSObjectIdentifiers.rc4)) {
StreamCipher cipher = new RC4Engine();
cipher.init(forEncryption, encKey);
return cipher;
} else if (encAlg.equals(NISTObjectIdentifiers.id_aes128_GCM) || encAlg.equals(NISTObjectIdentifiers.id_aes192_GCM) || encAlg.equals(NISTObjectIdentifiers.id_aes256_GCM)) {
AEADBlockCipher cipher = createAEADCipher(encryptionAlgID.getAlgorithm());
GCMParameters gcmParameters = GCMParameters.getInstance(encryptionAlgID.getParameters());
if (!(encKey instanceof KeyParameter)) {
throw new IllegalArgumentException("key data must be accessible for GCM operation");
}
AEADParameters aeadParameters = new AEADParameters((KeyParameter) encKey, gcmParameters.getIcvLen() * 8, gcmParameters.getNonce());
cipher.init(forEncryption, aeadParameters);
return cipher;
} else if (encAlg.equals(NISTObjectIdentifiers.id_aes128_CCM) || encAlg.equals(NISTObjectIdentifiers.id_aes192_CCM) || encAlg.equals(NISTObjectIdentifiers.id_aes256_CCM)) {
AEADBlockCipher cipher = createAEADCipher(encryptionAlgID.getAlgorithm());
CCMParameters ccmParameters = CCMParameters.getInstance(encryptionAlgID.getParameters());
if (!(encKey instanceof KeyParameter)) {
throw new IllegalArgumentException("key data must be accessible for GCM operation");
}
AEADParameters aeadParameters = new AEADParameters((KeyParameter) encKey, ccmParameters.getIcvLen() * 8, ccmParameters.getNonce());
cipher.init(forEncryption, aeadParameters);
return cipher;
} else {
BufferedBlockCipher cipher = createCipher(encryptionAlgID.getAlgorithm());
ASN1Primitive sParams = encryptionAlgID.getParameters().toASN1Primitive();
if (sParams != null && !(sParams instanceof ASN1Null)) {
if (encAlg.equals(PKCSObjectIdentifiers.des_EDE3_CBC) || encAlg.equals(AlgorithmIdentifierFactory.IDEA_CBC) || encAlg.equals(NISTObjectIdentifiers.id_aes128_CBC) || encAlg.equals(NISTObjectIdentifiers.id_aes192_CBC) || encAlg.equals(NISTObjectIdentifiers.id_aes256_CBC) || encAlg.equals(NTTObjectIdentifiers.id_camellia128_cbc) || encAlg.equals(NTTObjectIdentifiers.id_camellia192_cbc) || encAlg.equals(NTTObjectIdentifiers.id_camellia256_cbc) || encAlg.equals(KISAObjectIdentifiers.id_seedCBC) || encAlg.equals(OIWObjectIdentifiers.desCBC)) {
cipher.init(forEncryption, new ParametersWithIV(encKey, ASN1OctetString.getInstance(sParams).getOctets()));
} else if (encAlg.equals(AlgorithmIdentifierFactory.CAST5_CBC)) {
CAST5CBCParameters cbcParams = CAST5CBCParameters.getInstance(sParams);
cipher.init(forEncryption, new ParametersWithIV(encKey, cbcParams.getIV()));
} else if (encAlg.equals(PKCSObjectIdentifiers.RC2_CBC)) {
RC2CBCParameter cbcParams = RC2CBCParameter.getInstance(sParams);
cipher.init(forEncryption, new ParametersWithIV(new RC2Parameters(((KeyParameter) encKey).getKey(), rc2Ekb[cbcParams.getRC2ParameterVersion().intValue()]), cbcParams.getIV()));
} else {
throw new IllegalArgumentException("cannot match parameters");
}
} else {
if (encAlg.equals(PKCSObjectIdentifiers.des_EDE3_CBC) || encAlg.equals(AlgorithmIdentifierFactory.IDEA_CBC) || encAlg.equals(AlgorithmIdentifierFactory.CAST5_CBC)) {
cipher.init(forEncryption, new ParametersWithIV(encKey, new byte[8]));
} else {
cipher.init(forEncryption, encKey);
}
}
return cipher;
}
}
Aggregations