Add guava library

pom.xml

@@ -46,6 +46,7 @@
     <mockito.version>1.9.5</mockito.version>
     <jcip.version>1.0</jcip.version>
     <bc.version>1.58</bc.version>
+    <guava.version>33.1.0-jre</guava.version>
 
     <!-- properties -->
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -249,19 +250,25 @@
       <artifactId>canl</artifactId>
       <version>${canl.version}</version>
     </dependency>
-    
+
     <dependency>
         <groupId>org.bouncycastle</groupId>
         <artifactId>bcpkix-jdk15on</artifactId>
         <version>${bc.version}</version>
     </dependency>
-    
-        <dependency>
+
+    <dependency>
         <groupId>org.bouncycastle</groupId>
         <artifactId>bcprov-jdk15on</artifactId>
         <version>${bc.version}</version>
     </dependency>
 
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>${guava.version}</version>
+    </dependency>
+
     <dependency>
       <groupId>net.jcip</groupId>
       <artifactId>jcip-annotations</artifactId>

src/main/java/org/italiangrid/voms/util/CredentialsUtils.java

@@ -27,14 +27,18 @@
 import java.nio.file.Files;
 import java.nio.file.NoSuchFileException;
 import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.nio.file.StandardOpenOption;
 import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.PosixFilePermission;
 import java.nio.file.attribute.PosixFilePermissions;
 import java.security.PrivateKey;
 import java.security.cert.X509Certificate;
 import java.util.Arrays;
 import java.util.Set;
 
+import com.google.common.collect.Sets;
+
 import eu.emi.security.authn.x509.X509Credential;
 import eu.emi.security.authn.x509.helpers.CertificateHelpers;
 import eu.emi.security.authn.x509.impl.CertificateUtils;
@@ -218,13 +222,12 @@ public static void saveProxyCredentials(String proxyFileName, X509Credential uc,
     ByteArrayOutputStream baos = new ByteArrayOutputStream();
     saveProxyCredentials(baos, uc, encoding);
     baos.close();
-    ByteBuffer proxyBuffer = ByteBuffer.wrap(baos.toByteArray());
 
-    Set<java.nio.file.attribute.PosixFilePermission> ownerWritable =
-        PosixFilePermissions.fromString("rw-------");
-    FileAttribute<?> permissions = PosixFilePermissions.asFileAttribute(ownerWritable);
-    Set<StandardOpenOption> options = Set.of(CREATE_NEW, WRITE);
-    Path proxyFilePath = Path.of(proxyFileName);
+    final ByteBuffer proxyBuffer = ByteBuffer.wrap(baos.toByteArray());
+    final Path proxyFilePath = Paths.get(proxyFileName);
+    final FileAttribute<Set<PosixFilePermission>> permissions =
+        PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("rw-------"));
+    final Set<StandardOpenOption> options = Sets.newHashSet(CREATE_NEW, WRITE);
 
     try {
       Files.delete(proxyFilePath);