1 files changed, 68 insertions, 0 deletions
diff --git a/libraries/spongycastle/pg/src/main/java/org/spongycastle/openpgp/operator/bc/SHA1PGPDigestCalculator.java b/libraries/spongycastle/pg/src/main/java/org/spongycastle/openpgp/operator/bc/SHA1PGPDigestCalculator.java
new file mode 100644
index 000000000..15572a398
--- /dev/null
+++ b/libraries/spongycastle/pg/src/main/java/org/spongycastle/openpgp/operator/bc/SHA1PGPDigestCalculator.java
@@ -0,0 +1,68 @@
+package org.spongycastle.openpgp.operator.bc;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.spongycastle.bcpg.HashAlgorithmTags;
+import org.spongycastle.crypto.Digest;
+import org.spongycastle.crypto.digests.SHA1Digest;
+import org.spongycastle.openpgp.operator.PGPDigestCalculator;
+
+class SHA1PGPDigestCalculator
+    implements PGPDigestCalculator
+{
+    private Digest digest = new SHA1Digest();
+
+    public int getAlgorithm()
+    {
+        return HashAlgorithmTags.SHA1;
+    }
+
+    public OutputStream getOutputStream()
+    {
+        return new DigestOutputStream(digest);
+    }
+
+    public byte[] getDigest()
+    {
+        byte[] d = new byte[digest.getDigestSize()];
+
+        digest.doFinal(d, 0);
+
+        return d;
+    }
+
+    public void reset()
+    {
+        digest.reset();
+    }
+
+    private class DigestOutputStream
+        extends OutputStream
+    {
+        private Digest dig;
+
+        DigestOutputStream(Digest dig)
+        {
+            this.dig = dig;
+        }
+
+        public void write(byte[] bytes, int off, int len)
+            throws IOException
+        {
+            dig.update(bytes, off, len);
+        }
+
+        public void write(byte[] bytes)
+            throws IOException
+        {
+            dig.update(bytes, 0, bytes.length);
+        }
+
+        public void write(int b)
+            throws IOException
+        {
+            dig.update((byte)b);
+        }
+    }
+}