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Add check for BC provider, use reflection to avoid security restriction

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This commit is contained in:
Manfred Karrer 2016-04-23 00:11:36 +02:00
parent cfffcaa1b2
commit 32822cb5bd
3 changed files with 55 additions and 1 deletions
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42
common/src/main/java/io/bitsquare/common/util/Utilities.java
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@ -30,11 +30,15 @@ import org.slf4j.LoggerFactory;
import java.awt.*;
import java.io.*;
import java.lang.reflect.Field;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.security.Permission;
import java.security.PermissionCollection;
import java.util.Locale;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.*;
@ -407,4 +411,42 @@ public class Utilities {
return false;
}
}
// See: https://stackoverflow.com/questions/1179672/how-to-avoid-installing-unlimited-strength-jce-policy-files-when-deploying-an
public static void removeCryptographyRestrictions() {
if (!isRestrictedCryptography()) {
log.debug("Cryptography restrictions removal not needed");
return;
}
try {
final Class<?> jceSecurity = Class.forName("javax.crypto.JceSecurity");
final Class<?> cryptoPermissions = Class.forName("javax.crypto.CryptoPermissions");
final Class<?> cryptoAllPermission = Class.forName("javax.crypto.CryptoAllPermission");
final Field isRestrictedField = jceSecurity.getDeclaredField("isRestricted");
isRestrictedField.setAccessible(true);
isRestrictedField.set(null, false);
final Field defaultPolicyField = jceSecurity.getDeclaredField("defaultPolicy");
defaultPolicyField.setAccessible(true);
final PermissionCollection defaultPolicy = (PermissionCollection) defaultPolicyField.get(null);
final Field perms = cryptoPermissions.getDeclaredField("perms");
perms.setAccessible(true);
((Map<?, ?>) perms.get(defaultPolicy)).clear();
final Field instance = cryptoAllPermission.getDeclaredField("INSTANCE");
instance.setAccessible(true);
defaultPolicy.add((Permission) instance.get(null));
log.debug("Successfully removed cryptography restrictions");
} catch (Exception e) {
log.warn("Failed to remove cryptography restrictions", e);
}
}
public static boolean isRestrictedCryptography() {
// This simply matches the Oracle JRE, but not OpenJDK.
return "Java(TM) SE Runtime Environment".equals(System.getProperty("java.runtime.name"));
}
}

2
gui/src/main/java/io/bitsquare/app/BitsquareApp.java
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@ -123,6 +123,8 @@ public class BitsquareApp extends Application {
Thread.setDefaultUncaughtExceptionHandler(handler);
Thread.currentThread().setUncaughtExceptionHandler(handler);
if (Utilities.isRestrictedCryptography())
Utilities.removeCryptographyRestrictions();
Security.addProvider(new BouncyCastleProvider());
BitsquareApp.primaryStage = primaryStage;

12
gui/src/main/java/io/bitsquare/gui/main/MainViewModel.java
View File

@ -81,6 +81,7 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import java.security.Security;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
@ -541,7 +542,7 @@ public class MainViewModel implements ViewModel {
log.error(msg);
UserThread.execute(() -> new Popup<>().warning(msg)
.actionButtonText("Shut down")
.onAction(() -> BitsquareApp.shutDownHandler.run())
.onAction(BitsquareApp.shutDownHandler::run)
.closeButtonText("Report bug at Github issues")
.onClose(() -> Utilities.openWebPage("https://github.com/bitsquare/bitsquare/issues"))
.show());
@ -549,6 +550,15 @@ public class MainViewModel implements ViewModel {
}
};
checkCryptoThread.start();
if (Security.getProvider("BC") == null) {
new Popup<>().warning("There is a problem with the crypto libraries. BountyCastle is not available.")
.actionButtonText("Shut down")
.onAction(BitsquareApp.shutDownHandler::run)
.closeButtonText("Report bug at Github issues")
.onClose(() -> Utilities.openWebPage("https://github.com/bitsquare/bitsquare/issues"))
.show();
}
}