1 files changed, 76 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/tsp/cms/MetaDataUtil.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/tsp/cms/MetaDataUtil.java
new file mode 100644
index 000000000..f4ad579ad
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/tsp/cms/MetaDataUtil.java
@@ -0,0 +1,76 @@
+package org.spongycastle.tsp.cms;
+
+import java.io.IOException;
+
+import org.spongycastle.asn1.ASN1Encoding;
+import org.spongycastle.asn1.ASN1String;
+import org.spongycastle.asn1.cms.Attributes;
+import org.spongycastle.asn1.cms.MetaData;
+import org.spongycastle.cms.CMSException;
+import org.spongycastle.operator.DigestCalculator;
+
+class MetaDataUtil
+{
+    private final MetaData          metaData;
+
+    MetaDataUtil(MetaData metaData)
+    {
+        this.metaData = metaData;
+    }
+
+    void initialiseMessageImprintDigestCalculator(DigestCalculator calculator)
+        throws CMSException
+    {
+        if (metaData != null && metaData.isHashProtected())
+        {
+            try
+            {
+                calculator.getOutputStream().write(metaData.getEncoded(ASN1Encoding.DER));
+            }
+            catch (IOException e)
+            {
+                throw new CMSException("unable to initialise calculator from metaData: " + e.getMessage(), e);
+            }
+        }
+    }
+
+    String getFileName()
+    {
+        if (metaData != null)
+        {
+            return convertString(metaData.getFileName());
+        }
+
+        return null;
+    }
+
+    String getMediaType()
+    {
+        if (metaData != null)
+        {
+            return convertString(metaData.getMediaType());
+        }
+
+        return null;
+    }
+
+    Attributes getOtherMetaData()
+    {
+        if (metaData != null)
+        {
+            return metaData.getOtherMetaData();
+        }
+
+        return null;
+    }
+
+    private String convertString(ASN1String s)
+    {
+        if (s != null)
+        {
+            return s.toString();
+        }
+
+        return null;
+    }
+}