1 files changed, 41 insertions, 0 deletions
diff --git a/pkix/src/main/java/org/spongycastle/cert/crmf/PKMACValueGenerator.java b/pkix/src/main/java/org/spongycastle/cert/crmf/PKMACValueGenerator.java
new file mode 100644
index 00000000..eaf215ff
--- /dev/null
+++ b/pkix/src/main/java/org/spongycastle/cert/crmf/PKMACValueGenerator.java
@@ -0,0 +1,41 @@
+package org.spongycastle.cert.crmf;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.ASN1Encoding;
+import org.spongycastle.asn1.DERBitString;
+import org.spongycastle.asn1.crmf.PKMACValue;
+import org.spongycastle.asn1.x509.SubjectPublicKeyInfo;
+import org.spongycastle.operator.MacCalculator;
+
+class PKMACValueGenerator
+{
+    private PKMACBuilder builder;
+
+    public PKMACValueGenerator(PKMACBuilder builder)
+    {
+        this.builder = builder;
+    }
+
+    public PKMACValue generate(char[] password, SubjectPublicKeyInfo keyInfo)
+        throws CRMFException
+    {
+        MacCalculator calculator = builder.build(password);
+
+        OutputStream macOut = calculator.getOutputStream();
+
+        try
+        {
+            macOut.write(keyInfo.getEncoded(ASN1Encoding.DER));
+
+            macOut.close();
+        }
+        catch (IOException e)
+        {
+            throw new CRMFException("exception encoding mac input: " + e.getMessage(), e);
+        }
+
+        return new PKMACValue(calculator.getAlgorithmIdentifier(), new DERBitString(calculator.getMac()));
+    }
+}