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1package com.multicert.project.documentsigner.engine;
2
3import java.io.File;
4import java.io.FileInputStream;
5import java.io.FileOutputStream;
6import java.io.IOException;
7import java.io.InputStream;
8import java.security.InvalidKeyException;
9import java.security.Key;
10import java.security.NoSuchAlgorithmException;
11import java.security.PrivateKey;
12import java.security.Provider;
13import java.security.SignatureException;
14import java.security.cert.Certificate;
15import java.util.List;
16
17import javax.crypto.BadPaddingException;
18import javax.crypto.Cipher;
19import javax.crypto.IllegalBlockSizeException;
20import javax.crypto.NoSuchPaddingException;
21import javax.crypto.spec.SecretKeySpec;
22import javax.security.auth.callback.CallbackHandler;
23
24import org.apache.commons.logging.Log;
25import org.apache.commons.logging.LogFactory;
26import org.bouncycastle.crypto.CryptoException;
27
28import com.multicert.project.msign.common.timestamp.TimestampService;
29
30public class CipherEngine extends SignerEngine {
31	private Log LOGGER = LogFactory.getLog(CipherEngine.class.getName());
32	private  final String ALGORITHM = "AES";
33	private  final String TRANSFORMATION = "AES";
34
35	@Override
36	public void init(Provider provider, PrivateKey privKey, List<Certificate> certificateChain, String hashAlgorithm,
37			TimestampService tsaService, CallbackHandler callbackHandler) {
38		super.init(provider, privKey, certificateChain, hashAlgorithm, tsaService, callbackHandler);
39	}
40
41	@Override
42	public boolean verify(InputStream signStream, InputStream dataStream, String signFormat) throws SignatureException {
43		return super.verify(signStream, dataStream, signFormat);
44	}
45
46	@Override
47	public void reset() {
48		super.reset();
49	}
50
51	public void encrypt(String key, File inputFile, File outputFile) throws CryptoException {
52		doCrypto(Cipher.ENCRYPT_MODE, key, inputFile, outputFile);
53	}
54
55
56	public void decrypt(String key, File inputFile, File outputFile) throws CryptoException {
57		doCrypto(Cipher.DECRYPT_MODE, key, inputFile, outputFile);
58	}
59	
60	private void doCrypto(int cipherMode, String key, File inputFile, File outputFile) throws CryptoException {
61		 try {
62	            Key secretKey = new SecretKeySpec(key.getBytes(), ALGORITHM);
63	            Cipher cipher = Cipher.getInstance(TRANSFORMATION);
64	            cipher.init(cipherMode, secretKey);
65	             
66	            FileInputStream inputStream = new FileInputStream(inputFile);
67	            byte[] inputBytes = new byte[(int) inputFile.length()];
68	            inputStream.read(inputBytes);
69	             
70	            byte[] outputBytes = cipher.doFinal(inputBytes);
71	             
72	            FileOutputStream outputStream = new FileOutputStream(outputFile);
73	            outputStream.write(outputBytes);
74	             
75	            inputStream.close();
76	            outputStream.close();
77	             
78	        } catch (NoSuchPaddingException | NoSuchAlgorithmException
79	                | InvalidKeyException | BadPaddingException
80	                | IllegalBlockSizeException | IOException ex) {
81	            throw new CryptoException("Error encrypting/decrypting file", ex);
82	        }
83	    }
84	
85
86}