From ec95a4a9d7aec5d978881719c1bd19d6df4540e5 Mon Sep 17 00:00:00 2001
From: Andreas Fitzek <andreas.fitzek@iaik.tugraz.at>
Date: Fri, 3 Oct 2014 10:19:29 +0200
Subject: Register IAIK Providers order

---
 .../wag/egov/egiz/cfg/SettingsReader.java          | 33 ++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

(limited to 'pdf-as-lib')

diff --git a/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/cfg/SettingsReader.java b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/cfg/SettingsReader.java
index 832f952..7473590 100644
--- a/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/cfg/SettingsReader.java
+++ b/pdf-as-lib/src/main/java/at/knowcenter/wag/egov/egiz/cfg/SettingsReader.java
@@ -35,6 +35,7 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.Serializable;
+import java.security.Provider;
 import java.security.Security;
 import java.util.ArrayList;
 import java.util.Enumeration;
@@ -426,8 +427,8 @@ public class SettingsReader implements Serializable
         logger_.info(StringUtils.repeat("*", length + 25));
 
         if (registerProvider) {
-           IAIK.addAsProvider();
-           ECCProvider.addAsProvider();
+        	registerProvider(new IAIK(), 1);
+   			registerProvider(new ECCProvider(), 2);
         } else {
            if (Security.getProvider("IAIK") == null) {
               logger_.debug("Default IAIK JCE provider not registered.");
@@ -905,6 +906,34 @@ public class SettingsReader implements Serializable
 		logger_.info("PDF-AS info\n" + paddingString + "\n" + versionString + "\n" + paddingString);
   }
 
+  protected static void registerProvider(Provider provider, int position) {
+		String name = provider.getName();
+		if (Security.getProvider(name) == null) {
+			// register IAIK provider at first position
+			try {
+				if (position < 0) {
+					// add provider add default position.
+					Security.addProvider(provider);
+				} else {
+					Security.insertProviderAt(provider, position);
+				}
+			} catch (SecurityException e) {
+				logger_.info("Failed to register required security Provider.", e);
+			}
+		} else {
+			logger_.info("Required security Provider " + name + " already registered.");
+		}
+
+	}
+
+	protected static void listRegisteredSecurityProviders() {
+		Provider[] providers = Security.getProviders();
+		logger_.debug("Registered Security Providers:");
+		for (int i = 0; i < providers.length; i++) {
+			logger_.debug("    " + i + ": " + providers[i].getName() + " => " + providers[i].getInfo());
+		}
+	}
+  
   public Properties getProperties() {
      return this.properties_;
   }
-- 
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