1 files changed, 99 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/CMSUtils.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/CMSUtils.java
new file mode 100644
index 000000000..a0a0812cb
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/cms/jcajce/CMSUtils.java
@@ -0,0 +1,99 @@
+package org.spongycastle.cms.jcajce;
+
+import java.io.IOException;
+import java.security.AlgorithmParameters;
+import java.security.Provider;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.X509Certificate;
+
+import org.spongycastle.asn1.ASN1Encodable;
+import org.spongycastle.asn1.ASN1OctetString;
+import org.spongycastle.asn1.cms.IssuerAndSerialNumber;
+import org.spongycastle.asn1.x509.Certificate;
+import org.spongycastle.asn1.x509.Extension;
+import org.spongycastle.asn1.x509.TBSCertificateStructure;
+import org.spongycastle.cms.CMSException;
+import org.spongycastle.jcajce.JcaJceUtils;
+
+class CMSUtils
+{
+    static TBSCertificateStructure getTBSCertificateStructure(
+        X509Certificate cert)
+        throws CertificateEncodingException
+    {
+            return TBSCertificateStructure.getInstance(cert.getTBSCertificate());
+    }
+
+    static IssuerAndSerialNumber getIssuerAndSerialNumber(X509Certificate cert)
+        throws CertificateEncodingException
+    {
+        Certificate certStruct = Certificate.getInstance(cert.getEncoded());
+
+        return new IssuerAndSerialNumber(certStruct.getIssuer(), cert.getSerialNumber());
+    }
+
+
+    static byte[] getSubjectKeyId(X509Certificate cert)
+    {
+        byte[] ext = cert.getExtensionValue(Extension.subjectKeyIdentifier.getId());
+
+        if (ext != null)
+        {
+            return ASN1OctetString.getInstance(ASN1OctetString.getInstance(ext).getOctets()).getOctets();
+        }
+        else
+        {
+            return null;
+        }
+    }
+
+    static EnvelopedDataHelper createContentHelper(Provider provider)
+    {
+        if (provider != null)
+        {
+            return new EnvelopedDataHelper(new ProviderJcaJceExtHelper(provider));
+        }
+        else
+        {
+            return new EnvelopedDataHelper(new DefaultJcaJceExtHelper());
+        }
+    }
+
+    static EnvelopedDataHelper createContentHelper(String providerName)
+    {
+        if (providerName != null)
+        {
+            return new EnvelopedDataHelper(new NamedJcaJceExtHelper(providerName));
+        }
+        else
+        {
+            return new EnvelopedDataHelper(new DefaultJcaJceExtHelper());
+        }
+    }
+
+    static ASN1Encodable extractParameters(AlgorithmParameters params)
+        throws CMSException
+    {
+        try
+        {
+            return JcaJceUtils.extractParameters(params);
+        }
+        catch (IOException e)
+        {
+            throw new CMSException("cannot extract parameters: " + e.getMessage(), e);
+        }
+    }
+
+    static void loadParameters(AlgorithmParameters params, ASN1Encodable sParams)
+        throws CMSException
+    {
+        try
+        {
+            JcaJceUtils.loadParameters(params, sParams);
+        }
+        catch (IOException e)
+        {
+            throw new CMSException("error encoding algorithm parameters.", e);
+        }
+    }
+}
+\ No newline at end of file