1 files changed, 49 insertions, 0 deletions
diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/pkcs/MacDataGenerator.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/pkcs/MacDataGenerator.java
new file mode 100644
index 000000000..c6667d8b1
--- /dev/null
+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/pkcs/MacDataGenerator.java
@@ -0,0 +1,49 @@
+package org.spongycastle.pkcs;
+
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.spongycastle.asn1.pkcs.MacData;
+import org.spongycastle.asn1.pkcs.PKCS12PBEParams;
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.asn1.x509.DigestInfo;
+import org.spongycastle.operator.MacCalculator;
+
+class MacDataGenerator
+{
+    private PKCS12MacCalculatorBuilder builder;
+
+    MacDataGenerator(PKCS12MacCalculatorBuilder builder)
+    {
+        this.builder = builder;
+    }
+
+    public MacData build(char[] password, byte[] data)
+        throws PKCSException
+    {
+        MacCalculator     macCalculator;
+
+        try
+        {
+            macCalculator = builder.build(password);
+
+            OutputStream out = macCalculator.getOutputStream();
+
+            out.write(data);
+
+            out.close();
+        }
+        catch (Exception e)
+        {
+            throw new PKCSException("unable to process data: " + e.getMessage(), e);
+        }
+
+        AlgorithmIdentifier algId = macCalculator.getAlgorithmIdentifier();
+
+        DigestInfo dInfo = new DigestInfo(builder.getDigestAlgorithmIdentifier(), macCalculator.getMac());
+        PKCS12PBEParams params = PKCS12PBEParams.getInstance(algId.getParameters());
+
+        return new MacData(dInfo, params.getIV(), params.getIterations().intValue());
+    }
+}