1 files changed, 78 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/cert/cmp/CertificateConfirmationContentBuilder.java b/pkix/src/main/java/org/spongycastle/cert/cmp/CertificateConfirmationContentBuilder.java
new file mode 100644
index 00000000..106b3e24
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/cert/cmp/CertificateConfirmationContentBuilder.java
@@ -0,0 +1,78 @@
+package org.spongycastle.cert.cmp;
+
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.spongycastle.asn1.ASN1EncodableVector;
+import org.spongycastle.asn1.DERSequence;
+import org.spongycastle.asn1.cmp.CertConfirmContent;
+import org.spongycastle.asn1.cmp.CertStatus;
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.cert.X509CertificateHolder;
+import org.spongycastle.operator.DefaultDigestAlgorithmIdentifierFinder;
+import org.spongycastle.operator.DigestAlgorithmIdentifierFinder;
+import org.spongycastle.operator.DigestCalculator;
+import org.spongycastle.operator.DigestCalculatorProvider;
+import org.spongycastle.operator.OperatorCreationException;
+
+public class CertificateConfirmationContentBuilder
+{
+    private DigestAlgorithmIdentifierFinder digestAlgFinder;
+    private List acceptedCerts = new ArrayList();
+    private List acceptedReqIds = new ArrayList();
+
+    public CertificateConfirmationContentBuilder()
+    {
+        this(new DefaultDigestAlgorithmIdentifierFinder());
+    }
+
+    public CertificateConfirmationContentBuilder(DigestAlgorithmIdentifierFinder digestAlgFinder)
+    {
+        this.digestAlgFinder = digestAlgFinder;
+    }
+    
+    public CertificateConfirmationContentBuilder addAcceptedCertificate(X509CertificateHolder certHolder, BigInteger certReqID)
+    {
+        acceptedCerts.add(certHolder);
+        acceptedReqIds.add(certReqID);
+
+        return this;
+    }
+
+    public CertificateConfirmationContent build(DigestCalculatorProvider digesterProvider)
+        throws CMPException
+    {
+        ASN1EncodableVector v = new ASN1EncodableVector();
+
+        for (int i = 0; i != acceptedCerts.size(); i++)
+        {
+            X509CertificateHolder certHolder = (X509CertificateHolder)acceptedCerts.get(i);
+            BigInteger reqID = (BigInteger)acceptedReqIds.get(i);
+
+            AlgorithmIdentifier digAlg = digestAlgFinder.find(certHolder.toASN1Structure().getSignatureAlgorithm());
+            if (digAlg == null)
+            {
+                throw new CMPException("cannot find algorithm for digest from signature");
+            }
+
+            DigestCalculator digester;
+
+            try
+            {
+                digester = digesterProvider.get(digAlg);
+            }
+            catch (OperatorCreationException e)
+            {
+                throw new CMPException("unable to create digest: " + e.getMessage(), e);
+            }
+
+            CMPUtil.derEncodeToStream(certHolder.toASN1Structure(), digester.getOutputStream());
+
+            v.add(new CertStatus(digester.getDigest(), reqID));
+        }
+
+        return new CertificateConfirmationContent(CertConfirmContent.getInstance(new DERSequence(v)), digestAlgFinder);
+    }
+
+}