Execute become-spongy.sh

https://github.com/rtyley/spongycastle/blob/3040af/become-spongy.sh

1 files changed, 74 insertions, 0 deletions

diff --git a/pg/src/main/java/org/spongycastle/openpgp/operator/jcajce/JcaKeyFingerprintCalculator.java b/pg/src/main/java/org/spongycastle/openpgp/operator/jcajce/JcaKeyFingerprintCalculator.java
new file mode 100644
index 00000000..e72955f2
--- /dev/null
+++ b/pg/src/main/java/org/spongycastle/openpgp/operator/jcajce/JcaKeyFingerprintCalculator.java
@@ -0,0 +1,74 @@
+package org.spongycastle.openpgp.operator.jcajce;
+
+import java.io.IOException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+import org.spongycastle.bcpg.BCPGKey;
+import org.spongycastle.bcpg.MPInteger;
+import org.spongycastle.bcpg.PublicKeyPacket;
+import org.spongycastle.bcpg.RSAPublicBCPGKey;
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.operator.KeyFingerPrintCalculator;
+
+public class JcaKeyFingerprintCalculator
+    implements KeyFingerPrintCalculator
+{
+
+    // FIXME: Convert this to builder style so we can set provider?
+    public byte[] calculateFingerprint(PublicKeyPacket publicPk)
+        throws PGPException
+    {
+        BCPGKey key = publicPk.getKey();
+
+        if (publicPk.getVersion() <= 3)
+        {
+            RSAPublicBCPGKey rK = (RSAPublicBCPGKey)key;
+
+            try
+            {
+                MessageDigest digest = MessageDigest.getInstance("MD5");
+
+                byte[]  bytes = new MPInteger(rK.getModulus()).getEncoded();
+                digest.update(bytes, 2, bytes.length - 2);
+
+                bytes = new MPInteger(rK.getPublicExponent()).getEncoded();
+                digest.update(bytes, 2, bytes.length - 2);
+
+                return digest.digest();
+            }
+            catch (NoSuchAlgorithmException e)
+            {
+                throw new PGPException("can't find MD5", e);
+            }
+            catch (IOException e)
+            {
+                throw new PGPException("can't encode key components: " + e.getMessage(), e);
+            }
+        }
+        else
+        {
+            try
+            {
+                byte[]             kBytes = publicPk.getEncodedContents();
+
+                MessageDigest   digest = MessageDigest.getInstance("SHA1");
+
+                digest.update((byte)0x99);
+                digest.update((byte)(kBytes.length >> 8));
+                digest.update((byte)kBytes.length);
+                digest.update(kBytes);
+
+                return digest.digest();
+            }
+            catch (NoSuchAlgorithmException e)
+            {
+                throw new PGPException("can't find SHA1", e);
+            }
+            catch (IOException e)
+            {
+                throw new PGPException("can't encode key components: " + e.getMessage(), e);
+            }
+        }
+    }
+}