- changed file name encryption to SIV mode

- vastly improved exception handling, if decryption of a path name fails

main/crypto-api/src/main/java/org/cryptomator/crypto/Cryptor.java

@@ -65,8 +65,9 @@ public interface Cryptor extends SensitiveDataSwipeListener {
 	 * @param metadataSupport Support object allowing the Cryptor to read and write its own metadata to the location of the encrypted file.
 	 * @return Decrypted path components concatenated by the given cleartextPathSep. Must not start with cleartextPathSep, unless the
 	 *         cleartext path is explicitly absolute.
+	 * @throws DecryptFailedException If the decryption failed for various reasons (including wrong password).
 	 */
-	String decryptPath(String encryptedPath, char encryptedPathSep, char cleartextPathSep, CryptorIOSupport ioSupport);
+	String decryptPath(String encryptedPath, char encryptedPathSep, char cleartextPathSep, CryptorIOSupport ioSupport) throws DecryptFailedException;
 
 	/**
 	 * @return <code>true</code> If the integrity of the file can be assured.

main/crypto-api/src/main/java/org/cryptomator/crypto/SamplingDecorator.java

@@ -71,7 +71,7 @@ public class SamplingDecorator implements Cryptor, CryptorIOSampling {
 	}
 
 	@Override
-	public String decryptPath(String encryptedPath, char encryptedPathSep, char cleartextPathSep, CryptorIOSupport ioSupport) {
+	public String decryptPath(String encryptedPath, char encryptedPathSep, char cleartextPathSep, CryptorIOSupport ioSupport) throws DecryptFailedException {
 		decryptedBytes.addAndGet(StringUtils.length(encryptedPath));
 		return cryptor.decryptPath(encryptedPath, encryptedPathSep, cleartextPathSep, ioSupport);
 	}