add common-code for KeyStore and Credential handling

2 files changed, 161 insertions, 150 deletions

diff --git a/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/Constants.java b/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/Constants.java
index f607f8cb..11fd41fb 100644
--- a/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/Constants.java
+++ b/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/Constants.java
@@ -7,17 +7,37 @@ public class Constants {
 
   public static final String CONFIG_PROP_VDA_AUTHBLOCK_TRANSFORMATION_ID = CONFIG_PROP_PREFIX
       + ".vda.authblock.transformation.id";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_PATH = CONFIG_PROP_PREFIX + ".security.keystore.path";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_PASSWORD = CONFIG_PROP_PREFIX
-      + ".security.keystore.password";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_ALIAS = CONFIG_PROP_PREFIX + ".security.sign.alias";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_PASSWORD = CONFIG_PROP_PREFIX
-      + ".security.sign.password";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_ALIAS = CONFIG_PROP_PREFIX
-      + ".security.encryption.alias";
-  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_PASSWORD = CONFIG_PROP_PREFIX
-      + ".security.encryption.password";
+  
+  //KeyStore configuration
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_TYPE = 
+      CONFIG_PROP_PREFIX + ".security.keystore.type";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_NAME = 
+      CONFIG_PROP_PREFIX + ".security.keystore.name";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_PATH = 
+      CONFIG_PROP_PREFIX + ".security.keystore.path";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_PASSWORD = 
+      CONFIG_PROP_PREFIX + ".security.keystore.password";
+  
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_ALIAS = 
+      CONFIG_PROP_PREFIX + ".security.sign.alias";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_PASSWORD = 
+      CONFIG_PROP_PREFIX + ".security.sign.password";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_ALIAS = 
+      CONFIG_PROP_PREFIX + ".security.encryption.alias";
+  public static final String CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_PASSWORD = 
+      CONFIG_PROP_PREFIX + ".security.encryption.password";
 
+  //TrustStore configuration
+  public static final String CONFIG_PROP_SECURITY_TRUSTSTORE_TYPE = 
+      CONFIG_PROP_PREFIX + ".security.truststore.type";
+  public static final String CONFIG_PROP_SECURITY_TRUSTSTORE_NAME = 
+      CONFIG_PROP_PREFIX + ".security.truststore.name";
+  public static final String CONFIG_PROP_SECURITY_TRUSTSTORE_PATH = 
+      CONFIG_PROP_PREFIX + ".security.truststore.path";
+  public static final String CONFIG_PROP_SECURITY_TRUSTSTORE_PASSWORD = 
+      CONFIG_PROP_PREFIX + ".security.truststore.password";
+  
+  
   public static final String CONFIG_PROP_VDA_ENDPOINT_QUALeID_DEFAULT_ELEMENT = "default";
   public static final String CONFIG_PROP_VDA_ENDPOINT_QUALeID_DEFAULT = CONFIG_PROP_VDA_ENDPOINT_QUALeID
       + CONFIG_PROP_VDA_ENDPOINT_QUALeID_DEFAULT_ELEMENT;
diff --git a/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/utils/JsonSecurityUtils.java b/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/utils/JsonSecurityUtils.java
index 0d2c1815..259c21bf 100644
--- a/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/utils/JsonSecurityUtils.java
+++ b/eaaf_modules/eaaf_module_auth_sl20/src/main/java/at/gv/egiz/eaaf/modules/auth/sl20/utils/JsonSecurityUtils.java
@@ -1,17 +1,12 @@
 package at.gv.egiz.eaaf.modules.auth.sl20.utils;
 
 import java.io.IOException;
-import java.net.MalformedURLException;
 import java.security.Key;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
-import java.security.PrivateKey;
-import java.security.cert.Certificate;
 import java.security.cert.CertificateEncodingException;
 import java.security.cert.X509Certificate;
-import java.util.ArrayList;
 import java.util.Collections;
-import java.util.Enumeration;
 import java.util.List;
 
 import javax.annotation.Nonnull;
@@ -38,9 +33,13 @@ import com.fasterxml.jackson.core.JsonParseException;
 import com.fasterxml.jackson.databind.JsonNode;
 
 import at.gv.egiz.eaaf.core.api.idp.IConfiguration;
+import at.gv.egiz.eaaf.core.exception.EaafKeyAccessException;
 import at.gv.egiz.eaaf.core.exceptions.EaafConfigurationException;
-import at.gv.egiz.eaaf.core.impl.utils.FileUtils;
-import at.gv.egiz.eaaf.core.impl.utils.KeyStoreUtils;
+import at.gv.egiz.eaaf.core.impl.credential.EaafKeyStoreFactory;
+import at.gv.egiz.eaaf.core.impl.credential.EaafKeyStoreUtils;
+import at.gv.egiz.eaaf.core.impl.credential.KeyStoreConfiguration;
+import at.gv.egiz.eaaf.core.impl.credential.KeyStoreConfiguration.KeyStoreType;
+import at.gv.egiz.eaaf.core.impl.data.Pair;
 import at.gv.egiz.eaaf.core.impl.utils.X509Utils;
 import at.gv.egiz.eaaf.modules.auth.sl20.Constants;
 import at.gv.egiz.eaaf.modules.auth.sl20.data.VerificationResult;
@@ -53,88 +52,60 @@ import at.gv.egiz.eaaf.modules.auth.sl20.exceptions.SlCommandoParserException;
 public class JsonSecurityUtils implements IJoseTools {
   private static final Logger log = LoggerFactory.getLogger(JsonSecurityUtils.class);
 
-  @Autowired(required = true)
-  IConfiguration authConfig;
-  private Key signPrivKey = null;
-  private X509Certificate[] signCertChain = null;
-
-  private Key encPrivKey = null;
-  private X509Certificate[] encCertChain = null;
-
-  private List<X509Certificate> trustedCerts = new ArrayList<>();
-
+  private static final String FRIENDLYNAME_KEYSTORE = "SL2.0 KeyStore";
+  private static final String FRIENDLYNAME_TRUSTSTORE = "SL2.0 TrustStore";
+  
+  @Autowired(required = true) IConfiguration authConfig;
+  @Autowired(required = true) EaafKeyStoreFactory keystoreFactory;
+  
+  private KeyStore keyStore;
+  private KeyStore trustStore;
+ 
   private static JsonMapper mapper = new JsonMapper();
 
   @PostConstruct
-  protected void initalize() {
+  protected void initalize() throws SL20Exception {
     log.info("Initialize SL2.0 authentication security constrains ... ");
     try {
-      if (getKeyStoreFilePath() != null) {
-        final KeyStore keyStore = KeyStoreUtils.loadKeyStore(getKeyStoreFilePath(), getKeyStorePassword());
-
-        // load signing key
-        signPrivKey = keyStore.getKey(getSigningKeyAlias(), getSigningKeyPassword().toCharArray());
-        final Certificate[] certChainSigning = keyStore.getCertificateChain(getSigningKeyAlias());
-        signCertChain = new X509Certificate[certChainSigning.length];
-        for (int i = 0; i < certChainSigning.length; i++) {
-          if (certChainSigning[i] instanceof X509Certificate) {
-            signCertChain[i] = (X509Certificate) certChainSigning[i];
-          } else {
-            log.warn("NO X509 certificate for signing: " + certChainSigning[i].getType());
-          }
-
-        }
-
-        // load encryption key
-        try {
-          encPrivKey = keyStore.getKey(getEncryptionKeyAlias(), getEncryptionKeyPassword().toCharArray());
-          if (encPrivKey != null) {
-            final Certificate[] certChainEncryption = keyStore.getCertificateChain(getEncryptionKeyAlias());
-            encCertChain = new X509Certificate[certChainEncryption.length];
-            for (int i = 0; i < certChainEncryption.length; i++) {
-              if (certChainEncryption[i] instanceof X509Certificate) {
-                encCertChain[i] = (X509Certificate) certChainEncryption[i];
-              } else {
-                log.warn("NO X509 certificate for encryption: " + certChainEncryption[i].getType());
-              }
-            }
-          } else {
-            log.info("No encryption key for SL2.0 found. End-to-End encryption is not used.");
-          }
-
-        } catch (final Exception e) {
-          log.warn("No encryption key for SL2.0 found. End-to-End encryption is not used. Reason: " + e.getMessage(),
-              e);
-
-        }
-
-        // load trusted certificates
-        trustedCerts = readCertsFromKeyStore(keyStore);
-
-        // some short validation
-        if (signPrivKey == null || !(signPrivKey instanceof PrivateKey)) {
-          log.info("Can NOT open privateKey for SL2.0 signing. KeyStore=" + getKeyStoreFilePath());
-          throw new SL20Exception("sl20.03", new Object[] { "Can NOT open private key for signing" });
-
-        }
-
-        if (signCertChain == null || signCertChain.length == 0) {
-          log.info("NO certificate for SL2.0 signing. KeyStore=" + getKeyStoreFilePath());
-          throw new SL20Exception("sl20.03", new Object[] { "NO certificate for SL2.0 signing" });
-
-        }
-
-        log.info("SL2.0 authentication security constrains initialized.");
-
+      //load KeyStore
+      KeyStoreConfiguration keyStoreConfig = buildKeyStoreConfiguration();
+      keyStore = keystoreFactory.buildNewKeyStore(keyStoreConfig);
+      
+      //load TrustStore
+      KeyStoreConfiguration trustStoreConfig = buildTrustStoreConfiguration();
+      trustStore = keystoreFactory.buildNewKeyStore(trustStoreConfig);
+      
+      //validate KeyStore entries
+      EaafKeyStoreUtils.getPrivateKeyAndCertificates(keyStore, getSigningKeyAlias(), 
+              getSigningKeyPassword(), true, FRIENDLYNAME_KEYSTORE);
+      Pair<Key, X509Certificate[]> encCredentials = 
+          EaafKeyStoreUtils.getPrivateKeyAndCertificates(keyStore, getEncryptionKeyAlias(), 
+              getEncryptionKeyPassword(), false, FRIENDLYNAME_TRUSTSTORE);
+      if (encCredentials == null) {
+        log.info("No encryption key for SL2.0 found. End-to-End encryption is not used.");
+        
+      }
+      
+      //validate TrustStore
+      List<X509Certificate> trustedCerts = EaafKeyStoreUtils.readCertsFromKeyStore(trustStore);
+      if (trustedCerts.isEmpty()) {
+        log.info("No certificates in TrustStore: {}. Signature validation will FAIL!", 
+            FRIENDLYNAME_TRUSTSTORE);
+        
       } else {
-        log.info("NO SL2.0 authentication security configuration. Initialization was skipped");
+        log.info("Find #{} certificates in TrustStore: {}", 
+            trustedCerts.size(), FRIENDLYNAME_TRUSTSTORE);
+    
       }
+      
+      log.info("SL2.0 authentication security constrains initialized.");
 
     } catch (final RuntimeException e) {
       throw e;
 
     } catch (final Exception e) {
-      log.error("SL2.0 security constrains initialization FAILED.", e);
+      log.error("SL2.0 security constrains initialization FAILED.");
+      throw new SL20Exception("sl20.11", new Object[] {e.getMessage()}, e);
 
     }
 
@@ -153,15 +124,18 @@ public class JsonSecurityUtils implements IJoseTools {
 
       // set signing information
       jws.setAlgorithmHeaderValue(AlgorithmIdentifiers.RSA_USING_SHA256);
-      jws.setKey(signPrivKey);
+      Pair<Key, X509Certificate[]> signingCred = EaafKeyStoreUtils.getPrivateKeyAndCertificates(keyStore, 
+          getSigningKeyAlias(), getSigningKeyPassword(), true, FRIENDLYNAME_KEYSTORE);
+      
+      jws.setKey(signingCred.getFirst());
 
       // TODO:
-      jws.setCertificateChainHeaderValue(signCertChain);
-      jws.setX509CertSha256ThumbprintHeaderValue(signCertChain[0]);
+      jws.setCertificateChainHeaderValue(signingCred.getSecond());
+      jws.setX509CertSha256ThumbprintHeaderValue(signingCred.getSecond()[0]);
 
       return jws.getCompactSerialization();
 
-    } catch (final JoseException e) {
+    } catch (final JoseException | EaafKeyAccessException e) {
       log.warn("Can NOT sign SL2.0 command.", e);
       throw new SlCommandoBuildException("Can NOT sign SL2.0 command.", e);
 
@@ -172,7 +146,7 @@ public class JsonSecurityUtils implements IJoseTools {
   @Override
   public VerificationResult validateSignature(final String serializedContent, final KeyStore trustStore,
       final AlgorithmConstraints algconstraints) throws JoseException, IOException, KeyStoreException {
-    final List<X509Certificate> trustedCertificates = readCertsFromKeyStore(trustStore);
+    final List<X509Certificate> trustedCertificates = EaafKeyStoreUtils.readCertsFromKeyStore(trustStore);
     return validateSignature(serializedContent, trustedCertificates, algconstraints);
 
   }
@@ -244,7 +218,8 @@ public class JsonSecurityUtils implements IJoseTools {
           SL20Constants.SL20_ALGORITHM_WHITELIST_SIGNING
               .toArray(new String[SL20Constants.SL20_ALGORITHM_WHITELIST_SIGNING.size()]));
 
-      final VerificationResult result = validateSignature(serializedContent, trustedCerts, algConstraints);
+      final VerificationResult result = 
+          validateSignature(serializedContent, EaafKeyStoreUtils.readCertsFromKeyStore(trustStore), algConstraints);
 
       if (!result.isValidSigned()) {
         log.info("JWS signature invalide. Stopping authentication process ...");
@@ -256,7 +231,7 @@ public class JsonSecurityUtils implements IJoseTools {
       log.debug("SL2.0 commando signature validation sucessfull");
       return result;
 
-    } catch (JoseException | JsonParseException e) {
+    } catch (JoseException | JsonParseException | KeyStoreException e) {
       log.warn("SL2.0 commando signature validation FAILED", e);
       throw new SL20SecurityException(new Object[] { e.getMessage() }, e);
 
@@ -284,6 +259,9 @@ public class JsonSecurityUtils implements IJoseTools {
       // set payload
       receiverJwe.setCompactSerialization(compactSerialization);
 
+      Pair<Key, X509Certificate[]> encryptionCred = EaafKeyStoreUtils.getPrivateKeyAndCertificates(keyStore, 
+          getEncryptionKeyAlias(), getEncryptionKeyPassword(), true, FRIENDLYNAME_KEYSTORE);
+      
       // validate key from header against key from config
       final List<X509Certificate> x5cCerts = receiverJwe.getCertificateChainHeaderValue();
       final String x5t256 = receiverJwe.getX509CertSha256ThumbprintHeaderValue();
@@ -292,7 +270,7 @@ public class JsonSecurityUtils implements IJoseTools {
         log.trace("Sorting received X509 certificates ... ");
         final List<X509Certificate> sortedX5cCerts = X509Utils.sortCertificates(x5cCerts);
 
-        if (!sortedX5cCerts.get(0).equals(encCertChain[0])) {
+        if (!sortedX5cCerts.get(0).equals(encryptionCred.getSecond()[0])) {
           log.info("Certificate from JOSE header does NOT match encryption certificate");
 
           try {
@@ -307,7 +285,7 @@ public class JsonSecurityUtils implements IJoseTools {
 
       } else if (StringUtils.isNotEmpty(x5t256)) {
         log.debug("Found x5t256 fingerprint in JOSE header .... ");
-        final String certFingerPrint = X509Util.x5tS256(encCertChain[0]);
+        final String certFingerPrint = X509Util.x5tS256(encryptionCred.getSecond()[0]);
         if (!certFingerPrint.equals(x5t256)) {
           log.info("X5t256 from JOSE header does NOT match encryption certificate");
           log.debug("X5t256 from JOSE header: " + x5t256 + " Encrytption cert: " + certFingerPrint);
@@ -324,12 +302,12 @@ public class JsonSecurityUtils implements IJoseTools {
       }
 
       // set key
-      receiverJwe.setKey(encPrivKey);
+      receiverJwe.setKey(encryptionCred.getFirst());
 
       // decrypt payload
       return mapper.getMapper().readTree(receiverJwe.getPlaintextString());
 
-    } catch (final JoseException e) {
+    } catch (final JoseException | EaafKeyAccessException e) {
       log.warn("SL2.0 result decryption FAILED", e);
       throw new SL20SecurityException(new Object[] { e.getMessage() }, e);
 
@@ -340,37 +318,74 @@ public class JsonSecurityUtils implements IJoseTools {
     } catch (final IOException e) {
       log.warn("Decrypted SL2.0 result can not be parsed.", e);
       throw new SlCommandoParserException("Decrypted SL2.0 result can not be parsed", e);
+      
     }
-
   }
 
   @Override
   public X509Certificate getEncryptionCertificate() {
-    // TODO: maybe update after SL2.0 update on encryption certificate parts
-    if (encCertChain != null && encCertChain.length > 0) {
-      return encCertChain[0];
-    } else {
-      return null;
+    Pair<Key, X509Certificate[]> encryptionCred;
+    try {
+      encryptionCred = EaafKeyStoreUtils.getPrivateKeyAndCertificates(keyStore, 
+          getEncryptionKeyAlias(), getEncryptionKeyPassword(), false, FRIENDLYNAME_KEYSTORE);
+      if (encryptionCred != null && encryptionCred.getSecond().length > 0) {
+        return encryptionCred.getSecond()[0];
+        
+      }
+      
+    } catch (EaafKeyAccessException e) {
+      log.trace("Exception is skipped because Encryption is not mandatory on this level", e);
+      
     }
+    
+    return null;
+    
   }
 
-  private String getKeyStoreFilePath() throws EaafConfigurationException, MalformedURLException {
-    return FileUtils.makeAbsoluteUrl(authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_PATH),
-        authConfig.getConfigurationRootDirectory());
+  private KeyStoreConfiguration buildKeyStoreConfiguration() throws EaafConfigurationException {
+    KeyStoreConfiguration config = new KeyStoreConfiguration();
+    config.setFriendlyName(FRIENDLYNAME_KEYSTORE);
+    
+    config.setKeyStoreType(authConfig.getBasicConfiguration(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_TYPE), 
+        KeyStoreType.JKS.getKeyStoreType()));
+    config.setKeyStoreName(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_NAME));
+    config.setSoftKeyStoreFilePath(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_PATH));
+    config.setSoftKeyStorePassword(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_PASSWORD));
+    
+    //validate configuration state
+    config.validate();
+    
+    return config;
+    
   }
-
-  private String getKeyStorePassword() {
-    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_PASSWORD);
-    if (value != null) {
-      value = value.trim();
-    }
-
-    return value;
-
+  
+  private KeyStoreConfiguration buildTrustStoreConfiguration() throws EaafConfigurationException {
+    KeyStoreConfiguration config = new KeyStoreConfiguration();
+    config.setFriendlyName(FRIENDLYNAME_TRUSTSTORE);
+    
+    config.setKeyStoreType(authConfig.getBasicConfiguration(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_TRUSTSTORE_TYPE), 
+        KeyStoreType.JKS.getKeyStoreType()));
+    config.setKeyStoreName(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_TRUSTSTORE_NAME));
+    config.setSoftKeyStoreFilePath(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_TRUSTSTORE_PATH));
+    config.setSoftKeyStorePassword(
+        authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_TRUSTSTORE_PASSWORD));
+    
+    //validate configuration state
+    config.validate();
+    
+    return config;
   }
+  
 
   private String getSigningKeyAlias() {
-    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_ALIAS).trim();
+    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_ALIAS);
     if (value != null) {
       value = value.trim();
     }
@@ -378,18 +393,17 @@ public class JsonSecurityUtils implements IJoseTools {
     return value;
   }
 
-  private String getSigningKeyPassword() {
-    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_PASSWORD).trim();
+  private char[] getSigningKeyPassword() {
+    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_SIGN_PASSWORD);
     if (value != null) {
-      value = value.trim();
+      return value.trim().toCharArray();
     }
 
-    return value;
+    return null;
   }
 
   private String getEncryptionKeyAlias() {
-    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_ALIAS)
-        .trim();
+    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_ALIAS);
     if (value != null) {
       value = value.trim();
     }
@@ -397,36 +411,13 @@ public class JsonSecurityUtils implements IJoseTools {
     return value;
   }
 
-  private String getEncryptionKeyPassword() {
-    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_PASSWORD)
-        .trim();
+  private char[] getEncryptionKeyPassword() {
+    String value = authConfig.getBasicConfiguration(Constants.CONFIG_PROP_SECURITY_KEYSTORE_KEY_ENCRYPTION_PASSWORD);
     if (value != null) {
-      value = value.trim();
-    }
-
-    return value;
-  }
-
-  @Nonnull
-  private List<X509Certificate> readCertsFromKeyStore(@Nonnull final KeyStore keyStore) throws KeyStoreException {
-    final List<X509Certificate> result = new ArrayList<>();
-
-    final Enumeration<String> aliases = keyStore.aliases();
-    while (aliases.hasMoreElements()) {
-      final String el = aliases.nextElement();
-      log.trace("Process TrustStoreEntry: " + el);
-      if (keyStore.isCertificateEntry(el)) {
-        final Certificate cert = keyStore.getCertificate(el);
-        if (cert != null && cert instanceof X509Certificate) {
-          result.add((X509Certificate) cert);
-        } else {
-          log.info("Can not process entry: {}. Reason: {}", el, cert != null ? cert.getType() : "cert is null");
-        }
-
-      }
+      return value.trim().toCharArray();
     }
 
-    return Collections.unmodifiableList(result);
+    return null;
   }
 
 }