Discussion :

[dellys2]

Bonjour,
j'ai des fichiers encryptés en PGP et je voudrais les décryptés j'ai la clé privé et le mot de passe voici mon code java j'appel cette class par une class main ,c'est avec ce meme code que les fichiers on été crypté! , j’utilise myeclipse et jdk et jre 1.6 avec les jars bcpg-jdk15-135.jar et bcprov-jdk15-135.jar pour pgp ,j'ai essayé avec jdk et jre 1.5 mais ça marche pas aussi !! voici les messages que je reçois!! une idée Svp?

java.lang.Exception: org.bouncycastle.openpgp.PGPException: Exception creating cipher
at com.cogeco.app.process.creditscoring.cryptography.PGPCryptography.decrypt(PGPCryptography.java:261)
at com.cogeco.app.process.creditscoring.cryptography.DecryptFilesMain.main(DecryptFilesMain.java:18)
Caused by: org.bouncycastle.openpgp.PGPException: Exception creating cipher
at org.bouncycastle.openpgp.PGPSecretKey.extractKeyData(Unknown Source)
at org.bouncycastle.openpgp.PGPSecretKey.extractPrivateKey(Unknown Source)
at com.cogeco.app.process.creditscoring.cryptography.PGPCryptography.findSecretKey(PGPCryptography.java:306)
at com.cogeco.app.process.creditscoring.cryptography.PGPCryptography.decrypt(PGPCryptography.java:189)
... 1 more
Caused by: java.security.NoSuchAlgorithmException: No such algorithm: IDEA/CFB/NoPadding
at javax.crypto.Cipher.getInstance(DashoA13*..)
at javax.crypto.Cipher.getInstance(DashoA13*..)
... 5 more
Caused by: java.security.NoSuchAlgorithmException: Error constructing implementation (algorithm: IDEA, provider: BC, class: org.bouncycastle.jce.provider.JCEBlockCipher$IDEA)
at java.security.Provider$Service.newInstance(Provider.java:1245)
... 7 more
Caused by: java.lang.SecurityException: class "org.bouncycastle.crypto.CipherParameters"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(ClassLoader.java:776)
at java.lang.ClassLoader.preDefineClass(ClassLoader.java:488)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.newInstance0(Class.java:326)
at java.lang.Class.newInstance(Class.java:308)
at java.security.Provider$Service.newInstance(Provider.java:1221)
... 7 more

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import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;
import java.security.Security;
import java.util.Iterator;
 
import org.apache.commons.lang.builder.ToStringBuilder;
import org.apache.log4j.Logger;
import org.bouncycastle.bcpg.ArmoredOutputStream;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openpgp.PGPCompressedData;
import org.bouncycastle.openpgp.PGPCompressedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedDataGenerator;
import org.bouncycastle.openpgp.PGPEncryptedDataList;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPLiteralData;
import org.bouncycastle.openpgp.PGPObjectFactory;
import org.bouncycastle.openpgp.PGPOnePassSignatureList;
import org.bouncycastle.openpgp.PGPPrivateKey;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyEncryptedData;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection;
import org.bouncycastle.openpgp.PGPSecretKey;
import org.bouncycastle.openpgp.PGPSecretKeyRingCollection;
import org.bouncycastle.openpgp.PGPUtil;
 
 
public class PGPCryptography  {
 
	static private final Logger logger = Logger.getLogger(PGPCryptography.class);
 
	static {
		Security.addProvider(new BouncyCastleProvider());
	}
 
	public PGPCryptography() throws Exception {
 
	}
 
	public void listPublicKeys(File publicKeyFile) throws Exception{
 
		if(publicKeyFile == null || !publicKeyFile.exists()){
			throw new IllegalArgumentException("publicKeyFile cannot be null and must be an existing file");
		}
 
		try {
 
			InputStream in = new FileInputStream(publicKeyFile);
			PGPPublicKeyRing publicKeyRing = new PGPPublicKeyRing(in);
 
			Iterator it = publicKeyRing.getPublicKeys();
			while(it.hasNext()){
 
				PGPPublicKey k = (PGPPublicKey) it.next();
 
				ToStringBuilder b = new ToStringBuilder(k);
				b.append("isMasterKey", k.isMasterKey());
				b.append("isEncryptionKey", k.isEncryptionKey());
				b.append("isRevoked", k.isRevoked());
 
				String userids = "";
				Iterator useridIt = k.getUserIDs();
				while(useridIt.hasNext()){
					String uid = (String) useridIt.next();
					if(userids.length() > 0){
						userids += ", ";
					}
					userids += uid;
				}
 
				b.append("userids", userids);
 
				logger.info(b);
			}
 
		} catch (Throwable e) {
			throw new Exception(e);
		}
 
	}
 
	public File encrypt(File publicKeyFile, String userid, File sourceFile) throws Exception {
 
		if(publicKeyFile == null || !publicKeyFile.exists()){
			throw new IllegalArgumentException("publicKeyFile cannot be null and must be an existing file");
		}
		if(sourceFile == null || !sourceFile.exists()){
			throw new IllegalArgumentException("sourceFile cannot be null and must be an existing file");
		}
 
		logger.debug("About to encrypt content of file: " + sourceFile.getName());
 
		try {
 
			File encryptedFile = File.createTempFile("pgp_", ".encrypted", new File("C:\\pgp\\decryptedfile\\"));
			FileOutputStream fileOut = new FileOutputStream(encryptedFile);
 
			PGPPublicKey publicKey = findPublicKey(publicKeyFile, userid, true);
 
			if(publicKey == null){
				throw new IllegalArgumentException("no public key for " + userid + " in keyring " + publicKeyFile);
			}
 
			ArmoredOutputStream armoredOut = new ArmoredOutputStream(fileOut);
			ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
			PGPCompressedDataGenerator compressedData = new PGPCompressedDataGenerator(PGPCompressedDataGenerator.ZIP);
			PGPUtil.writeFileToLiteralData(compressedData.open(byteArrayOut), PGPLiteralData.BINARY, sourceFile);
			compressedData.close();
			PGPEncryptedDataGenerator encryptedDataGenerator = new PGPEncryptedDataGenerator(PGPEncryptedDataGenerator.CAST5, new SecureRandom(), "BC");
			encryptedDataGenerator.addMethod(publicKey);
 
			byte[] bytes = byteArrayOut.toByteArray();
 
			OutputStream encryptedOut = encryptedDataGenerator.open(armoredOut, bytes.length);
 
			encryptedOut.write(bytes);
			encryptedDataGenerator.close();
			armoredOut.close();
			fileOut.close();
 
			logger.debug("file was encrypted : " + sourceFile.getName());
			return encryptedFile;
 
		} catch (Exception e) {
			logger.error("Encrypt exception ", e);
			throw new Exception(e);
		}
 
	}
 
	public File decrypt(File privateKeyFile, String privateKeyPassword, File encryptedFile) throws Exception {
 
		File decryptedFile = null;
 
		if(privateKeyFile == null || !privateKeyFile.exists()){
			throw new IllegalArgumentException("privateKeyFile cannot be null and must be an existing file");
		}
		if(encryptedFile == null || !encryptedFile.exists()){
			throw new IllegalArgumentException("encryptedFile cannot be null and must be an existing file");
		}
 
		try {
 
			InputStream encryptedFileIn = new FileInputStream(encryptedFile);
			InputStream privateKeyIn = new FileInputStream(privateKeyFile);
 
			decryptedFile = File.createTempFile("pgp_", ".decrypted");
			logger.debug("About to decrypt content of file: " + decryptedFile.getName());
 
			FileOutputStream out = new FileOutputStream(decryptedFile);
 
			logger.debug("decrypting content of " + encryptedFile.getName() + " to " + decryptedFile.getName());
 
			encryptedFileIn = PGPUtil.getDecoderStream(encryptedFileIn);
 
			PGPObjectFactory pgpObjectFactory = new PGPObjectFactory(encryptedFileIn);
			PGPEncryptedDataList encryptedDataList;
			Object pgpObject = pgpObjectFactory.nextObject();
 
			if (pgpObject instanceof PGPEncryptedDataList) {
				encryptedDataList = (PGPEncryptedDataList) pgpObject;
			} else {
				encryptedDataList = (PGPEncryptedDataList) pgpObjectFactory.nextObject();
			}
 
			Iterator encryptedDataListIt = encryptedDataList.getEncryptedDataObjects();
 
			PGPPrivateKey privateKey = null;
			PGPPublicKeyEncryptedData privateKeyEncryptedData = null;
 
			while (privateKey == null && encryptedDataListIt.hasNext()) {
				privateKeyEncryptedData = (PGPPublicKeyEncryptedData) encryptedDataListIt.next();
				privateKey = findSecretKey(privateKeyIn, privateKeyEncryptedData.getKeyID(), privateKeyPassword.toCharArray());
			}
 
			if (privateKey == null){
				encryptedFileIn.close();
				privateKeyIn.close();
				throw new IllegalStateException("no private key could be found");
			}
 
			InputStream clear = privateKeyEncryptedData.getDataStream(privateKey, "BC");
 
			PGPObjectFactory plainFact = new PGPObjectFactory(clear);
 
			Object thing = plainFact.nextObject();
			Object message = null;
 
			if (thing instanceof PGPLiteralData) {
 
				message = thing;
 
			} else if (thing instanceof PGPCompressedData) {
 
				PGPCompressedData cData = (PGPCompressedData) thing;
 
				InputStream compressedStream = new BufferedInputStream(cData.getDataStream());
				PGPObjectFactory pgpFact = new PGPObjectFactory(compressedStream);
 
				message = pgpFact.nextObject();
 
				if (message instanceof PGPOnePassSignatureList) {
					message = pgpFact.nextObject();
				}
 
			}
 
			if (message instanceof PGPLiteralData) {
 
				// decrypt as normal
				PGPLiteralData literal = (PGPLiteralData) message;
				BufferedReader w = new BufferedReader(new InputStreamReader(literal.getInputStream()));
 
				String s = null;
				while((s = w.readLine()) != null){
					//logger.debug("decrypted: " + s);
					out.write(s.getBytes());
				}
 
			} else {
				logger.error("message type " + message.toString() + " not supported.");
				return null;
			}
			if (privateKeyEncryptedData.isIntegrityProtected()) {
				if (!privateKeyEncryptedData.verify()) {
					logger.error("message failed integrity check");
					return null;
				}
			}
 
			out.close();
			encryptedFileIn.close();
			privateKeyIn.close();
 
			return decryptedFile;
 
		} catch (Exception e) {
 
			if(decryptedFile != null){
				decryptedFile.delete();
			}
 
			logger.error("An error occured during PGP decryption: \n", e);
 
			throw new Exception(e);
		}
 
	}
 
 
	public PGPPublicKey findPublicKey(File publicKeyFile, String userid, boolean encryption) throws IOException, PGPException {
 
		PGPPublicKeyRingCollection publicKeyRingCollection = new PGPPublicKeyRingCollection(PGPUtil.getDecoderStream(new FileInputStream(publicKeyFile)));
 
		Iterator keyRingIt = publicKeyRingCollection.getKeyRings();
 
		while (keyRingIt.hasNext()) {
 
			PGPPublicKeyRing keyRing = (PGPPublicKeyRing) keyRingIt.next();
 
			Iterator keysIt = keyRing.getPublicKeys();
			while (keysIt.hasNext()) {
 
				PGPPublicKey key = (PGPPublicKey) keysIt.next();
 
				Iterator userIt = key.getUserIDs();
				while(userIt.hasNext()){
					String user = (String) userIt.next();
					if(user.equalsIgnoreCase(userid) && key.isEncryptionKey() == encryption){
						return key;
					}
 
				}
 
			}
		}
 
		return null;
	}
 
	private PGPPrivateKey findSecretKey(InputStream privateKeyIn, long privateKeyID, char[] password) throws IOException, PGPException, NoSuchProviderException {
 
		PGPSecretKeyRingCollection secretKeyRingCollection = new PGPSecretKeyRingCollection(PGPUtil.getDecoderStream(privateKeyIn));
		PGPSecretKey secretKey = secretKeyRingCollection.getSecretKey(privateKeyID);
 
		if (secretKey == null) {
			return null;
		}
 
		return secretKey.extractPrivateKey(password, "BC");
	}
 
}

[Jimmy_]

Bonjour,

Comme l'indique l'exception java.lang.SecurityException, tu as un soucis d'ordre général de signature de jar dans le même package.

Peut-être des versions mélangées ou modifiées, difficile de savoir comme ça.

[dellys2]

Tout a fait Jimmy_ ,il y'avait des jars en plus que j'ai ajouté a la va vite car je n'avais pas le projet au complet ,j'ai fait un peu le ménage j'ai laissé que les jars dont j'avais besoin et ca marche encore une fois merci.