diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/main/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManager.java b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/main/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManager.java
index 6fae6f0..56d0142 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/main/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManager.java
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/main/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManager.java
@@ -20,23 +20,15 @@
 package org.openecomp.sdc.vendorsoftwareproduct.security;
 
 import com.google.common.collect.ImmutableSet;
-import java.io.ByteArrayInputStream;
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
+
+import java.io.*;
 import java.security.GeneralSecurityException;
 import java.security.InvalidAlgorithmParameterException;
-import java.security.InvalidKeyException;
 import java.security.NoSuchAlgorithmException;
 import java.security.NoSuchProviderException;
-import java.security.PublicKey;
 import java.security.Security;
-import java.security.SignatureException;
 import java.security.cert.CertPathBuilder;
 import java.security.cert.CertStore;
-import java.security.cert.Certificate;
 import java.security.cert.CertificateException;
 import java.security.cert.CertificateExpiredException;
 import java.security.cert.CertificateFactory;
@@ -49,7 +41,12 @@
 import java.security.cert.X509Certificate;
 import java.util.Collection;
 import java.util.HashSet;
+import java.util.function.Predicate;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 import java.util.Set;
+
 import org.bouncycastle.asn1.cms.ContentInfo;
 import org.bouncycastle.cert.X509CertificateHolder;
 import org.bouncycastle.cms.CMSException;
@@ -77,6 +74,7 @@
 
     private Logger logger = LoggerFactory.getLogger(SecurityManager.class);
     private Set<X509Certificate> trustedCertificates = new HashSet<>();
+    private Set<X509Certificate> trustedCertificatesFromPackage = new HashSet<>();
     private File certificateDirectory;
 
     static {
@@ -113,7 +111,7 @@
      * @return set of trustedCertificates
      * @throws SecurityManagerException
      */
-    public Set<X509Certificate> getTrustedCertificates() throws SecurityManagerException {
+    public Set<X509Certificate> getTrustedCertificates() throws SecurityManagerException, FileNotFoundException {
         //if file number in certificate directory changed reload certs
         String[] certFiles = certificateDirectory.list();
         if (certFiles == null) {
@@ -124,6 +122,10 @@
             trustedCertificates = new HashSet<>();
             processCertificateDir();
         }
+        if (!trustedCertificatesFromPackage.isEmpty()) {
+            return Stream.concat(trustedCertificatesFromPackage.stream(), trustedCertificates.stream())
+                    .collect(Collectors.toUnmodifiableSet());
+        }
         return ImmutableSet.copyOf(trustedCertificates);
     }
 
@@ -146,7 +148,7 @@
     public boolean verifySignedData(final byte[] messageSyntaxSignature, final byte[] packageCert,
                                     final byte[] innerPackageFile) throws SecurityManagerException {
         try (ByteArrayInputStream signatureStream = new ByteArrayInputStream(messageSyntaxSignature);
-            final PEMParser pemParser = new PEMParser(new InputStreamReader(signatureStream))) {
+             final PEMParser pemParser = new PEMParser(new InputStreamReader(signatureStream))) {
             final Object parsedObject = pemParser.readObject();
             if (!(parsedObject instanceof ContentInfo)) {
                 throw new SecurityManagerException("Signature is not recognized");
@@ -158,17 +160,17 @@
             final Collection<SignerInformation> signers = signedData.getSignerInfos().getSigners();
             final SignerInformation firstSigner = signers.iterator().next();
             final X509Certificate cert;
+            Collection<X509CertificateHolder> certs;
             if (packageCert == null) {
-                final Collection<X509CertificateHolder> firstSignerCertificates = signedData.getCertificates()
-                    .getMatches(firstSigner.getSID());
-                if (!firstSignerCertificates.iterator().hasNext()) {
-                    throw new SecurityManagerException(
-                        "No certificate found in cms signature that should contain one!");
-                }
-                cert = loadCertificate(firstSignerCertificates.iterator().next().getEncoded());
+                certs = signedData.getCertificates().getMatches(null);
+                cert = readSignCert(certs, firstSigner).orElseThrow(() -> new SecurityManagerException(
+                        "No certificate found in cms signature that should contain one!"));
             } else {
-                cert = loadCertificate(packageCert);
+                certs = parseCertsFromPem(packageCert);
+                cert = readSignCert(certs, firstSigner).orElseThrow(() -> new SecurityManagerException(
+                        "No matching certificate found in certificate file that should contain one!"));
             }
+            trustedCertificatesFromPackage = readTrustedCerts(certs, firstSigner);
 
             if (verifyCertificate(cert, getTrustedCertificates()) == null) {
                 return false;
@@ -183,7 +185,36 @@
         }
     }
 
-    private void processCertificateDir() throws SecurityManagerException {
+    private Optional<X509Certificate> readSignCert(final Collection<X509CertificateHolder> certs, final SignerInformation firstSigner) {
+        return certs.stream()
+               .filter(crt -> firstSigner.getSID().match(crt))
+               .findAny()
+               .map(this::loadCertificate);
+    }
+
+    private Set<X509Certificate> readTrustedCerts(final Collection<X509CertificateHolder> certs, final SignerInformation firstSigner) {
+        return certs.stream()
+                .filter(crt -> !firstSigner.getSID().match(crt))
+                .map(this::loadCertificate)
+                .filter(Predicate.not(this::isSelfSigned))
+                .collect(Collectors.toSet());
+    }
+
+    private Set<X509CertificateHolder> parseCertsFromPem(final byte[] packageCert) throws IOException {
+        final ByteArrayInputStream packageCertStream = new ByteArrayInputStream(packageCert);
+        final PEMParser pemParser = new PEMParser(new InputStreamReader(packageCertStream));
+        Object readObject = pemParser.readObject();
+        Set<X509CertificateHolder> allCerts = new HashSet<>();
+        while (readObject != null) {
+            if (readObject instanceof X509CertificateHolder) {
+                allCerts.add((X509CertificateHolder) readObject);
+            }
+            readObject = pemParser.readObject();
+        }
+        return allCerts;
+    }
+
+    private void processCertificateDir() throws SecurityManagerException, FileNotFoundException {
         if (!certificateDirectory.exists() || !certificateDirectory.isDirectory()) {
             logger.error("Issue with certificate directory, check if exists!");
             return;
@@ -207,27 +238,30 @@
         return new File(certDirLocation);
     }
 
-    private X509Certificate loadCertificate(File certFile) throws SecurityManagerException {
-        try (InputStream fileInputStream = new FileInputStream(certFile)) {
-            CertificateFactory factory = CertificateFactory.getInstance("X.509");
-            return (X509Certificate) factory.generateCertificate(fileInputStream);
-        } catch (CertificateException | IOException e) {
-            throw new SecurityManagerException("Error during loading Certificate file!", e);
+    private X509Certificate loadCertificate(File certFile) throws SecurityManagerException, FileNotFoundException {
+        return loadCertificateFactory(new FileInputStream(certFile));
+    }
+
+    private X509Certificate loadCertificate(X509CertificateHolder cert) {
+        try {
+            return loadCertificateFactory(new ByteArrayInputStream(cert.getEncoded()));
+        } catch (IOException | SecurityManagerException e) {
+            throw new RuntimeException("Error during loading Certificate from bytes!", e);
         }
     }
 
-    private X509Certificate loadCertificate(byte[] certFile) throws SecurityManagerException {
-        try (InputStream in = new ByteArrayInputStream(certFile)) {
+    private X509Certificate loadCertificateFactory(InputStream in) throws SecurityManagerException {
+        try {
             CertificateFactory factory = CertificateFactory.getInstance("X.509");
             return (X509Certificate) factory.generateCertificate(in);
-        } catch (CertificateException | IOException e) {
+        } catch (CertificateException e) {
             throw new SecurityManagerException("Error during loading Certificate from bytes!", e);
         }
     }
 
     private PKIXCertPathBuilderResult verifyCertificate(X509Certificate cert,
                                                         Set<X509Certificate> additionalCerts)
-        throws GeneralSecurityException, SecurityManagerException {
+            throws GeneralSecurityException, SecurityManagerException {
         if (null == cert) {
             throw new SecurityManagerException("The certificate is empty!");
         }
@@ -256,7 +290,7 @@
     private PKIXCertPathBuilderResult verifyCertificate(X509Certificate cert,
                                                         Set<X509Certificate> allTrustedRootCerts,
                                                         Set<X509Certificate> allIntermediateCerts)
-        throws GeneralSecurityException {
+            throws GeneralSecurityException {
 
         // Create the selector that specifies the starting certificate
         X509CertSelector selector = new X509CertSelector();
@@ -286,14 +320,14 @@
         pkixParams.addCertStore(createCertStore(allTrustedRootCerts));
 
         CertPathBuilder builder = CertPathBuilder
-            .getInstance(CertPathBuilder.getDefaultType(), BouncyCastleProvider.PROVIDER_NAME);
+                .getInstance(CertPathBuilder.getDefaultType(), BouncyCastleProvider.PROVIDER_NAME);
         return (PKIXCertPathBuilderResult) builder.build(pkixParams);
     }
 
     private CertStore createCertStore(Set<X509Certificate> certificateSet) throws InvalidAlgorithmParameterException,
-        NoSuchAlgorithmException, NoSuchProviderException {
+            NoSuchAlgorithmException, NoSuchProviderException {
         return CertStore.getInstance("Collection", new CollectionCertStoreParameters(certificateSet),
-            BouncyCastleProvider.PROVIDER_NAME);
+                BouncyCastleProvider.PROVIDER_NAME);
     }
 
     private boolean isExpired(X509Certificate cert) {
@@ -309,18 +343,7 @@
         return false;
     }
 
-    private boolean isSelfSigned(Certificate cert)
-        throws CertificateException, NoSuchAlgorithmException,
-        NoSuchProviderException {
-        try {
-            // Try to verify certificate signature with its own public key
-            PublicKey key = cert.getPublicKey();
-            cert.verify(key);
-            return true;
-        } catch (SignatureException | InvalidKeyException e) {
-            logger.error(e.getMessage(), e);
-            //not self-signed
-            return false;
-        }
+    private boolean isSelfSigned(X509Certificate cert) {
+        return cert.getIssuerDN().equals(cert.getSubjectDN());
     }
 }
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManagerTest.java b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManagerTest.java
index 7c5cb66..0ed871d 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManagerTest.java
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/java/org/openecomp/sdc/vendorsoftwareproduct/security/SecurityManagerTest.java
@@ -7,9 +7,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -21,9 +21,10 @@
 package org.openecomp.sdc.vendorsoftwareproduct.security;
 
 import org.apache.commons.io.FileUtils;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 import java.io.File;
 import java.io.IOException;
@@ -36,32 +37,42 @@
 
 public class SecurityManagerTest {
     private File certDir;
+    private String cerDirPath = "/tmp/cert/";
     private SecurityManager securityManager;
 
-    @Before
+    private File PrepareCertFiles(String origFilePath, String newFilePath) throws IOException, URISyntaxException {
+        File origFile = new File(getClass().getResource(origFilePath).toURI());
+        File newFile = new File(newFilePath);
+        newFile.createNewFile();
+        FileUtils.copyFile(origFile, newFile);
+        return newFile;
+    }
+
+    private byte[] readAllBytes(String path) throws URISyntaxException, IOException {
+        return Files.readAllBytes(Paths.get(getClass().getResource(path).toURI()));
+    }
+
+    @BeforeEach
     public void setUp() throws IOException {
-        certDir = new File("/tmp/cert");
-        if(certDir.exists()){
+        certDir = new File(cerDirPath);
+        if (certDir.exists()) {
             tearDown();
         }
         certDir.mkdirs();
         securityManager = new SecurityManager(certDir.getPath());
     }
 
-    @After
+    @AfterEach
     public void tearDown() throws IOException {
-        if(certDir.exists()) {
+        if (certDir.exists()) {
             FileUtils.deleteDirectory(certDir);
         }
         securityManager.cleanTrustedCertificates();
     }
 
     @Test
-    public void testGetCertificates() throws IOException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root-certificate.pem");
-        File newFile = new File("/tmp/cert/root-certificate.pem");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
+    public void testGetCertificates() throws IOException, SecurityManagerException, URISyntaxException {
+        File newFile = PrepareCertFiles("/cert/root-certificate.pem", cerDirPath + "/root-certificate.pem");
         assertEquals(1, securityManager.getTrustedCertificates().size());
         newFile.delete();
         assertEquals(0, securityManager.getTrustedCertificates().size());
@@ -73,26 +84,22 @@
         assertEquals(0, securityManager.getTrustedCertificates().size());
     }
 
-    @Test(expected = SecurityManagerException.class)
+    @Test
     public void testGetCertificatesException() throws IOException, SecurityManagerException {
-        File newFile = new File("/tmp/cert/root-certificate.pem");
-        newFile.createNewFile();
-        assertEquals(1, securityManager.getTrustedCertificates().size());
-        newFile.delete();
-        assertEquals(0, securityManager.getTrustedCertificates().size());
+        Assertions.assertThrows(SecurityManagerException.class, () -> {
+            File newFile = new File(cerDirPath + "root-certificate.pem");
+            newFile.createNewFile();
+            assertEquals(1, securityManager.getTrustedCertificates().size());
+            newFile.delete();
+            assertEquals(0, securityManager.getTrustedCertificates().size());
+        });
     }
 
     @Test
-    public void testGetCertificatesUpdated() throws IOException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root-certificate.pem");
-        File newFile = new File("/tmp/cert/root-certificate.pem");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
+    public void testGetCertificatesUpdated() throws IOException, SecurityManagerException, URISyntaxException {
+        File newFile = PrepareCertFiles("/cert/root-certificate.pem", cerDirPath + "root-certificate.pem");
         assertTrue(securityManager.getTrustedCertificates().size() == 1);
-        File otherOrigFile = new File("src/test/resources/cert/package-certificate.pem");
-        File otherNewFile = new File("/tmp/cert/package-certificate.pem");
-        newFile.createNewFile();
-        FileUtils.copyFile(otherOrigFile, otherNewFile);
+        File otherNewFile = PrepareCertFiles("/cert/package-certificate.pem", cerDirPath + "package-certificate.pem");
         assertEquals(2, securityManager.getTrustedCertificates().size());
         otherNewFile.delete();
         assertEquals(1, securityManager.getTrustedCertificates().size());
@@ -102,58 +109,94 @@
 
     @Test
     public void verifySignedDataTestCertIncludedIntoSignature() throws IOException, URISyntaxException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root.cert");
-        File newFile = new File("/tmp/cert/root.cert");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
-        byte[] signature = Files.readAllBytes(Paths.get(getClass().getResource("/cert/2-file-signed-package/dummyPnfv4.cms").toURI()));
-        byte[] archive = Files.readAllBytes(Paths.get(getClass().getResource("/cert/2-file-signed-package/dummyPnfv4.csar").toURI()));
+        PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+        byte[] signature = readAllBytes("/cert/2-file-signed-package/dummyPnfv4.cms");
+        byte[] archive = readAllBytes("/cert/2-file-signed-package/dummyPnfv4.csar");
         assertTrue(securityManager.verifySignedData(signature, null, archive));
     }
 
-    @Test(expected = SecurityManagerException.class)
+    @Test
     public void verifySignedDataTestCertNotIncludedIntoSignatureButExpected() throws IOException, URISyntaxException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root.cert");
-        File newFile = new File("/tmp/cert/root.cert");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
-        byte[] signature = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.cms").toURI()));
-        byte[] archive = Files.readAllBytes(Paths.get(getClass().getResource("/cert/2-file-signed-package/dummyPnfv4.csar").toURI()));
-        securityManager.verifySignedData(signature, null, archive);
+        Assertions.assertThrows(SecurityManagerException.class, () -> {
+            PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+            byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+            byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+            securityManager.verifySignedData(signature, null, archive);
+        });
+
     }
 
     @Test
     public void verifySignedDataTestCertNotIncludedIntoSignature() throws IOException, URISyntaxException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root.cert");
-        File newFile = new File("/tmp/cert/root.cert");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
-        byte[] signature = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.cms").toURI()));
-        byte[] archive = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.csar").toURI()));
-        byte[] cert = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.cert").toURI()));
+        PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+        byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+        byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+        byte[] cert = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cert");
         assertTrue(securityManager.verifySignedData(signature, cert, archive));
     }
 
-    @Test(expected = SecurityManagerException.class)
-    public void verifySignedDataTestWrongCertificate() throws IOException, URISyntaxException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root-certificate.pem");
-        File newFile = new File("/tmp/cert/root-certificate.cert");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
-        byte[] signature = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.cms").toURI()));
-        byte[] archive = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.csar").toURI()));
-        byte[] cert = Files.readAllBytes(Paths.get(getClass().getResource("/cert/3-file-signed-package/dummyPnfv4.cert").toURI()));
-        securityManager.verifySignedData(signature, cert, archive);
+    @Test
+    public void verifySignedDataTestCertIntermediateNotIncludedIntoSignature() throws IOException, URISyntaxException, SecurityManagerException {
+        PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+        PrepareCertFiles("/cert/signing-ca2.crt", cerDirPath + "signing-ca2.crt");
+        byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+        byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+        byte[] cert = readAllBytes("/cert/3-file-signed-package/dummyPnfv4-no-intermediate.cert");
+        assertTrue(securityManager.verifySignedData(signature, cert, archive));
     }
 
-    @Test(expected = SecurityManagerException.class)
+    @Test
+    public void verifySignedDataTestCertWrongIntermediate() throws IOException, URISyntaxException, SecurityManagerException {
+        Assertions.assertThrows(SecurityManagerException.class, () -> {
+            PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+            PrepareCertFiles("/cert/signing-ca1.crt", cerDirPath + "signing-ca1.crt");
+            byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+            byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+            byte[] cert = readAllBytes("/cert/3-file-signed-package/dummyPnfv4-no-intermediate.cert");
+            securityManager.verifySignedData(signature, cert, archive);
+        });
+
+    }
+
+    @Test
+    public void verifySignedDataTestCertIncludedIntoSignatureWithWrongIntermediateInDirectory() throws IOException, URISyntaxException, SecurityManagerException {
+        PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+        PrepareCertFiles("/cert/signing-ca1.crt", cerDirPath + "signing-ca1.crt");
+        byte[] signature = readAllBytes("/cert/2-file-signed-package/dummyPnfv4.cms");
+        byte[] archive = readAllBytes("/cert/2-file-signed-package/dummyPnfv4.csar");
+        assertTrue(securityManager.verifySignedData(signature, null, archive));
+    }
+
+    @Test
+    public void verifySignedDataTestCertWrongIntermediateInDirectory() throws IOException, URISyntaxException, SecurityManagerException {
+        PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+        PrepareCertFiles("/cert/signing-ca1.crt", cerDirPath + "signing-ca1.crt");
+        byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+        byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+        byte[] cert = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cert");
+        assertTrue(securityManager.verifySignedData(signature, cert, archive));
+    }
+
+    @Test
+    public void verifySignedDataTestWrongCertificate() throws IOException, URISyntaxException, SecurityManagerException {
+        Assertions.assertThrows(SecurityManagerException.class, () -> {
+            PrepareCertFiles("/cert/root-certificate.pem", cerDirPath + "root-certificate.cert");
+            byte[] signature = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cms");
+            byte[] archive = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.csar");
+            byte[] cert = readAllBytes("/cert/3-file-signed-package/dummyPnfv4.cert");
+            securityManager.verifySignedData(signature, cert, archive);
+        });
+
+    }
+
+    @Test
     public void verifySignedDataTestChangedArchive() throws IOException, URISyntaxException, SecurityManagerException {
-        File origFile = new File("src/test/resources/cert/root.cert");
-        File newFile = new File("/tmp/cert/root.cert");
-        newFile.createNewFile();
-        FileUtils.copyFile(origFile, newFile);
-        byte[] signature = Files.readAllBytes(Paths.get(getClass().getResource("/cert/tampered-signed-package/dummyPnfv4.cms").toURI()));
-        byte[] archive = Files.readAllBytes(Paths.get(getClass().getResource("/cert/tampered-signed-package/dummyPnfv4.csar").toURI()));
-        securityManager.verifySignedData(signature, null, archive);
+        Assertions.assertThrows(SecurityManagerException.class, () -> {
+            PrepareCertFiles("/cert/root.cert", cerDirPath + "root.cert");
+            byte[] signature = readAllBytes("/cert/tampered-signed-package/dummyPnfv4.cms");
+            byte[] archive = readAllBytes("/cert/tampered-signed-package/dummyPnfv4.csar");
+            securityManager.verifySignedData(signature, null, archive);
+        });
+
     }
 }
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/2-file-signed-package/dummyPnfv4.cms b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/2-file-signed-package/dummyPnfv4.cms
index 2a8a7b5..6098f22 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/2-file-signed-package/dummyPnfv4.cms
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/2-file-signed-package/dummyPnfv4.cms
@@ -1,34 +1,56 @@
 -----BEGIN CMS-----
-MIIFzQYJKoZIhvcNAQcCoIIFvjCCBboCAQExDTALBglghkgBZQMEAgEwCwYJKoZI
-hvcNAQcBoIIDJDCCAyAwggIIAgkA1fOx4pBO5yQwDQYJKoZIhvcNAQELBQAwUjEL
-MAkGA1UEBhMCSUUxEjAQBgNVBAgMCVdlc3RtZWF0aDEQMA4GA1UEBwwHQXRobG9u
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 -----END CMS-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4-no-intermediate.cert b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4-no-intermediate.cert
new file mode 100644
index 0000000..85b932e
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4-no-intermediate.cert
@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
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\ No newline at end of file
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cert b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cert
index fa70b69..7d03a59 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cert
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cert
@@ -1,19 +1,43 @@
 -----BEGIN CERTIFICATE-----
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+-----BEGIN CERTIFICATE-----
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 -----END CERTIFICATE-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cms b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cms
index 12c8471..5c0239a 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cms
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/3-file-signed-package/dummyPnfv4.cms
@@ -1,17 +1,18 @@
 -----BEGIN CMS-----
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 -----END CMS-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private1.key b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private1.key
new file mode 100644
index 0000000..28ab7a9
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private1.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQCh9XoFXEIOosrd
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+mSH5W/dtbX46Hd5iXrf8844=
+-----END PRIVATE KEY-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private2.key b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private2.key
new file mode 100644
index 0000000..8894bdb
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package-private2.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQC27pU4C5ns/QWR
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+Wx21/Sm4PMVUv/3gDJFdUQ==
+-----END PRIVATE KEY-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package1.cert b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package1.cert
new file mode 100644
index 0000000..fb41d2f
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package1.cert
@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDOTCCAiECFCVhgEwD8PWsuikhBvw2WrhOTlrMMA0GCSqGSIb3DQEBCwUAMHox
+EzARBgoJkiaJk/IsZAEZFgNvcmcxFjAUBgoJkiaJk/IsZAEZFgZzaW1wbGUxEzAR
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+/FPqYHWLiIJlJOdiKa1l4HXejjVlR9HCLPU5HYmzSzQ/IEijsUaTB0d6eXLk6uBa
+tCPueQQxgA2pEGI5NA==
+-----END CERTIFICATE-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package2.cert b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package2.cert
new file mode 100644
index 0000000..f45f672
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/package2.cert
@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDOTCCAiECFFqXkiZIzIdNPTG62Jbr3Ub37ZuTMA0GCSqGSIb3DQEBCwUAMHox
+EzARBgoJkiaJk/IsZAEZFgNvcmcxFjAUBgoJkiaJk/IsZAEZFgZzaW1wbGUxEzAR
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+NSqYN8Ixin+/mpN86g==
+-----END CERTIFICATE-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/root.cert b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/root.cert
index ece4fb4..2a92193 100644
--- a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/root.cert
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/root.cert
@@ -1,21 +1,82 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 1 (0x1)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: DC=org, DC=simple, O=Simple Inc, OU=Simple Root CA, CN=Simple Root CA
+        Validity
+            Not Before: Jan 14 11:14:15 2021 GMT
+            Not After : Jan 14 11:14:15 2031 GMT
+        Subject: DC=org, DC=simple, O=Simple Inc, OU=Simple Root CA, CN=Simple Root CA
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:a4:7a:26:63:c1:d9:80:23:ea:c8:81:2e:2e:e2:
+                    77:be:37:c1:d6:8c:35:a4:3c:53:7c:e0:b1:b1:e1:
+                    9f:49:47:fe:e6:24:5e:16:28:ab:c2:0f:d6:5b:03:
+                    f2:12:68:89:ae:d8:0f:4d:11:de:68:19:7f:57:d3:
+                    43:3e:e2:98:f0:94:7c:c1:f5:5d:1d:88:12:28:9e:
+                    d0:b0:2b:a5:d1:6e:41:82:1e:e1:31:da:71:4f:b6:
+                    5c:9c:49:fb:b6:4c:69:e6:e9:2a:94:64:dc:eb:08:
+                    33:a0:2c:63:84:40:0f:c4:d6:f3:3d:33:de:08:ab:
+                    ad:21:d4:58:14:de:9a:96:d6:a8:bd:69:7d:a1:2d:
+                    dd:11:7c:53:27:4b:0d:60:e6:aa:3e:ec:74:a7:bc:
+                    ef:86:05:57:22:4c:a3:e0:eb:3c:f8:8b:d1:fb:3f:
+                    8d:e3:e2:22:ef:cf:d3:c1:ff:55:0d:8e:bf:4e:60:
+                    50:6f:3f:16:28:81:5e:9d:39:48:ee:fb:2c:08:83:
+                    cd:a3:6c:ed:68:45:8f:1b:d4:ef:2a:7b:f0:50:75:
+                    8e:1a:cb:4e:c7:7f:71:34:76:96:af:d2:12:41:71:
+                    8c:e7:e4:29:53:9a:09:2a:92:85:b3:fd:52:40:a6:
+                    bb:79:93:53:c5:ed:3a:40:fd:e3:12:a9:00:1c:ac:
+                    4c:f7
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Key Usage: critical
+                Certificate Sign, CRL Sign
+            X509v3 Basic Constraints: critical
+                CA:TRUE
+            X509v3 Subject Key Identifier: 
+                08:0C:D0:E5:51:5B:A6:E7:E9:07:C7:69:3E:BA:AB:36:A3:8B:D3:4B
+            X509v3 Authority Key Identifier: 
+                keyid:08:0C:D0:E5:51:5B:A6:E7:E9:07:C7:69:3E:BA:AB:36:A3:8B:D3:4B
+
+    Signature Algorithm: sha1WithRSAEncryption
+         7c:38:02:94:99:44:19:9d:81:b6:4a:82:6a:4d:68:2c:f5:52:
+         92:1d:16:a9:2d:06:a6:bc:06:29:fc:e5:61:b9:15:67:05:f3:
+         c7:ce:5c:8e:5d:78:04:b8:c7:4d:d9:bf:05:42:3d:44:95:9c:
+         26:f4:78:2c:19:22:57:2c:81:2e:a3:88:89:5b:8f:32:75:11:
+         49:0c:1b:1f:05:41:1c:4e:29:71:ab:3f:5e:28:39:3f:27:eb:
+         0c:32:89:23:50:6c:c9:77:4a:fc:73:bd:8a:91:c4:ef:70:5b:
+         67:bb:b9:a7:8b:60:30:c6:09:f2:eb:d4:dd:ce:c4:e8:bc:33:
+         17:2c:7a:80:fb:8a:63:49:7b:3c:bd:c1:3f:bc:67:ef:97:ca:
+         6b:78:11:17:a2:57:9b:56:73:5e:ad:e6:21:4e:62:fd:29:6b:
+         28:f5:32:ff:1a:00:b2:5c:aa:2a:f4:0a:a0:74:7a:76:65:ab:
+         3d:e9:92:9d:0b:4c:09:2a:3b:7d:0f:24:d7:e5:4a:19:4e:06:
+         e1:53:0d:30:5a:5b:4d:56:4b:bb:83:d2:42:a4:f0:58:94:38:
+         74:23:ea:02:13:76:4a:5e:a9:1c:32:f1:95:b1:9e:d1:8d:84:
+         73:a9:52:94:91:61:f0:67:ed:6f:f6:96:f9:56:c0:fd:e8:0f:
+         b6:ee:bf:4f
 -----BEGIN CERTIFICATE-----
-MIIDejCCAmKgAwIBAgIJAINbMi0Mb24EMA0GCSqGSIb3DQEBCwUAMFIxCzAJBgNV
-BAYTAklFMRIwEAYDVQQIDAlXZXN0bWVhdGgxEDAOBgNVBAcMB0F0aGxvbmUxDDAK
-BgNVBAoMA0VTWTEPMA0GA1UECwwGVGVjaG5vMB4XDTE5MDQyOTEyNTY0OFoXDTI5
-MDQyNjEyNTY0OFowUjELMAkGA1UEBhMCSUUxEjAQBgNVBAgMCVdlc3RtZWF0aDEQ
-MA4GA1UEBwwHQXRobG9uZTEMMAoGA1UECgwDRVNZMQ8wDQYDVQQLDAZUZWNobm8w
-ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDBFiFHPO+6prpZfUsGaKTk
-tWSJN+4b+EtGgVqjYP/Oo0LLWvpAYgvgA/6198Gmt+dJCiOEa3y9+G+BW4XSFQnd
-IwbZlO599rkM5sz9VkBgpZHVE5QLOoko9ahZi8/ny8iSyF0IH8jE+dijXcHsYTCX
-tkKw9OE6HO+y04caBLdeidVzYUW/mSB+LBY9/PKwTOcWRM4em8l5sx8xZ3HtV27P
-1arNAFxq2K0cxoNPZJ+9xSN8yaZwc3QyXRYP8EDGN59SCAZWxkXAEhGaNm5golnY
-KCxsCKDGa5Zu4/JuwPbSUOvSkpojz2dft+keMVKIN14R5ng9EinLDO/ooMMz4pbT
-AgMBAAGjUzBRMB0GA1UdDgQWBBQl0gdoNInn0JvQoTUhU0MTvohrSDAfBgNVHSME
-GDAWgBQl0gdoNInn0JvQoTUhU0MTvohrSDAPBgNVHRMBAf8EBTADAQH/MA0GCSqG
-SIb3DQEBCwUAA4IBAQCJBq2ELa/OXonAarawEqvaVxek0zw+BE/9XC1fTdA1QI1K
-ozRFWxYOkSjTvkdEz+IxuCMvqMjPOrmwDNsVyjRlK1RtBn3RQSHx4T5rCHuvxD0G
-yffFxniJlOU2oMYD71bnW8AqlvyHckIF7jNFD+GnPoSCJWoakcV1RCvgkeZxNwAM
-sTnwaLtR1qrkl27NrvwUtwfRebUt/M7c+V7ZgWq1J8P859ZISqnbLgfzWhZ1CQ3X
-9FTO2sX8gQPvP7VkvHuXKNDuiMYvcXziMOp3G39RBoEvSLHq4xnJAw+YwaerOn5s
-CWHkzJ1IgLvuGfn22uEW+C+9DlMipfsEX1GfhviL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 -----END CERTIFICATE-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca1.crt b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca1.crt
new file mode 100644
index 0000000..1576239
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca1.crt
@@ -0,0 +1,82 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 3 (0x3)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: DC=org, DC=simple, O=Simple Inc, OU=Simple Root CA, CN=Simple Root CA
+        Validity
+            Not Before: Jan 14 11:16:01 2021 GMT
+            Not After : Jan 14 11:16:01 2031 GMT
+        Subject: DC=org, DC=simple, O=Simple Inc, OU=Simple Signing CA, CN=Simple Signing CA
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:da:7b:d8:40:6a:3f:ac:c1:8c:34:e7:2b:af:7d:
+                    48:f3:e5:eb:a3:62:1f:a0:05:17:1b:00:7f:02:5f:
+                    61:89:0f:5a:8f:b6:21:d5:46:4a:b8:8d:77:30:dc:
+                    4a:e3:7b:6f:cb:21:64:98:07:20:93:fb:0a:0d:05:
+                    cd:b5:d7:89:7f:1f:ce:8f:52:5f:96:62:b4:f6:93:
+                    6c:91:42:0c:a8:37:53:f8:5e:e2:14:f8:83:5f:e3:
+                    9a:fd:28:75:89:ee:be:b3:f8:1a:66:cc:a3:65:13:
+                    15:74:d9:ae:1c:6e:3b:dc:71:02:90:b6:8f:d8:74:
+                    26:56:76:fa:af:a8:44:93:9d:12:de:7a:23:de:15:
+                    a7:8d:7b:54:ad:c2:a6:14:a3:af:4b:73:0c:7d:07:
+                    29:78:21:85:c6:6c:44:9e:31:91:e9:8a:b4:37:c6:
+                    63:48:c6:41:78:0a:9f:d4:12:75:65:d5:a0:72:68:
+                    b3:71:29:93:78:94:a3:96:77:4a:ef:62:b9:a8:fa:
+                    ec:11:38:e4:49:31:00:84:89:f1:11:99:6c:02:3c:
+                    6a:7d:1c:d0:60:4b:75:5d:83:6d:04:15:20:48:50:
+                    0e:1c:7c:56:0a:7b:2f:76:a3:2e:d0:9e:2d:cf:47:
+                    ff:17:a3:76:2d:8d:d8:fd:23:20:d8:24:9b:64:3a:
+                    44:57
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Key Usage: critical
+                Certificate Sign, CRL Sign
+            X509v3 Basic Constraints: critical
+                CA:TRUE, pathlen:0
+            X509v3 Subject Key Identifier: 
+                2F:77:F6:0E:2A:F9:54:74:3A:A1:07:54:67:B8:66:5C:FA:AE:D7:17
+            X509v3 Authority Key Identifier: 
+                keyid:08:0C:D0:E5:51:5B:A6:E7:E9:07:C7:69:3E:BA:AB:36:A3:8B:D3:4B
+
+    Signature Algorithm: sha1WithRSAEncryption
+         6d:55:6b:90:64:91:09:73:fb:3e:22:85:12:8d:cf:f5:8c:90:
+         e0:ee:34:9e:74:30:d3:0c:e9:fa:5c:c9:b7:5c:7e:0b:6b:3b:
+         00:03:ea:7b:bc:fe:28:cc:9c:a1:1e:08:b4:69:a2:11:b7:f0:
+         23:5e:33:3f:4b:e2:eb:1d:28:b7:ef:43:68:b8:ca:eb:a3:fb:
+         98:92:3b:e1:a9:18:86:fe:3d:6b:2f:0d:f5:b7:09:10:fe:66:
+         89:a3:09:29:e2:2f:d5:16:ef:5e:94:96:14:10:79:1c:f6:82:
+         c9:82:2d:bb:76:90:f1:e0:2d:67:01:17:7b:69:84:83:31:87:
+         f7:16:a1:f9:46:23:9c:36:81:51:3b:8a:c2:c9:0e:da:a9:bf:
+         73:aa:46:ff:5d:35:35:34:4b:fc:63:c5:03:37:8e:26:a2:c4:
+         95:d0:5b:94:46:94:bf:23:e7:4b:e0:7c:48:28:04:13:b5:e7:
+         b1:59:5e:85:f4:23:63:3d:f8:f5:d5:ca:90:f2:20:25:36:82:
+         50:a8:75:17:d0:b7:32:12:9d:6e:2b:fa:99:15:6b:9f:c7:c3:
+         7f:2e:ee:5b:19:b7:bf:f4:8e:be:79:50:93:87:08:a0:20:5c:
+         d0:45:5c:00:e5:ea:c4:12:4a:b1:59:fb:24:a3:6f:a5:cc:ce:
+         73:c1:87:ac
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca2.crt b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca2.crt
new file mode 100644
index 0000000..c0f743a
--- /dev/null
+++ b/openecomp-be/backend/openecomp-sdc-vendor-software-product-manager/src/test/resources/cert/signing-ca2.crt
@@ -0,0 +1,82 @@
+Certificate:
+    Data:
+        Version: 3 (0x2)
+        Serial Number: 4 (0x4)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: DC=org, DC=simple, O=Simple Inc, OU=Simple Root CA, CN=Simple Root CA
+        Validity
+            Not Before: Jan 14 11:29:38 2021 GMT
+            Not After : Jan 14 11:29:38 2031 GMT
+        Subject: DC=org, DC=simple, O=Simple Inc, OU=Simple Signing CA, CN=Simple Signing CA
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:b7:a4:4b:30:86:d8:af:90:5b:d7:a2:f9:ab:34:
+                    1d:dd:0a:40:b5:11:3a:33:8a:01:d1:24:18:5e:0a:
+                    ad:a4:d2:cd:b7:0f:46:16:5a:b5:5c:dd:d9:10:cf:
+                    b5:6a:14:e8:23:c3:35:f7:85:2f:82:13:7e:03:76:
+                    28:c1:7d:dd:ed:3b:78:b3:4e:b8:ac:b8:87:97:2c:
+                    21:67:e3:5b:74:c1:87:d1:bc:ba:1e:f3:98:8e:eb:
+                    16:90:09:4f:fa:bb:d2:92:fc:77:79:74:9e:de:41:
+                    4e:3e:fd:cc:5c:08:33:d4:58:f7:44:5c:86:62:c4:
+                    8d:70:c1:a1:e7:87:0a:0b:6a:16:07:da:66:ff:bb:
+                    1b:be:1b:0e:14:25:a0:36:d4:e5:63:b2:a5:fd:08:
+                    e7:4f:c4:4e:d4:77:db:28:5d:59:cd:c0:05:55:c2:
+                    00:9d:44:94:b4:f7:9d:32:d2:3c:f9:1b:a4:ca:80:
+                    85:c2:14:36:24:f2:5f:50:b3:33:3e:ec:9e:58:71:
+                    94:d5:3d:d1:97:f7:bd:cc:a5:aa:11:6a:38:3b:c6:
+                    ff:ab:a2:81:ab:67:f2:10:cd:43:79:75:09:c3:93:
+                    22:10:5b:58:34:bb:d4:17:ec:2b:90:a2:7a:1b:68:
+                    ab:de:25:34:70:48:19:29:57:ee:e4:f8:2e:76:07:
+                    56:e5
+                Exponent: 65537 (0x10001)
+        X509v3 extensions:
+            X509v3 Key Usage: critical
+                Certificate Sign, CRL Sign
+            X509v3 Basic Constraints: critical
+                CA:TRUE, pathlen:0
+            X509v3 Subject Key Identifier: 
+                25:C0:9E:5E:BC:5B:CA:3A:22:00:6C:34:28:31:DD:E6:18:AB:B6:BE
+            X509v3 Authority Key Identifier: 
+                keyid:08:0C:D0:E5:51:5B:A6:E7:E9:07:C7:69:3E:BA:AB:36:A3:8B:D3:4B
+
+    Signature Algorithm: sha1WithRSAEncryption
+         40:16:4b:11:e2:d4:f2:ed:e7:b2:04:6f:3a:0e:66:2d:45:4b:
+         3e:95:27:47:0e:35:7d:14:c7:40:bf:ce:9d:fd:25:60:03:8d:
+         4f:7d:8a:7c:1f:11:f8:4c:27:e1:0c:72:3c:3f:ef:15:ac:3c:
+         b7:9c:d3:81:e9:58:7f:be:e6:8e:9a:e8:13:12:68:2c:2e:a6:
+         75:45:d5:91:ec:3a:3f:95:60:2b:59:36:6f:ea:68:8c:01:4b:
+         96:ad:1c:45:20:fe:61:db:fd:0c:c3:6a:84:72:47:8e:f5:60:
+         76:98:90:00:27:a1:65:15:95:69:a3:1c:a9:48:6b:96:4e:13:
+         93:54:a7:fb:5c:93:4b:c6:94:97:9f:09:36:70:b6:7a:cc:b6:
+         1d:8d:1e:0d:b3:54:11:a9:7a:ab:ec:80:76:e9:14:e2:a8:99:
+         cb:4f:7f:58:ef:65:e7:fe:f6:b5:31:45:9e:69:c7:f6:4d:a8:
+         33:d9:15:d7:e1:1c:93:ff:03:75:be:53:8c:a9:02:f2:e7:c3:
+         0b:06:f6:72:83:32:55:da:ac:8f:5c:ad:3d:0d:a0:e2:87:d2:
+         bb:6f:b0:07:0a:ee:bd:2b:5a:09:10:9c:39:1a:66:6e:86:be:
+         30:ce:79:dc:40:22:78:ca:a2:fb:44:3b:f9:5b:a0:45:9d:7d:
+         99:3f:66:3e
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----