added fallback tests for digest creation in PGP JCA layer

Author: dghgit

pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/OperatorHelper.java

@@ -48,7 +48,8 @@ MessageDigest createDigest(int algorithm)
         }
         catch (NoSuchAlgorithmException e)
         {
-            if (algorithm >= HashAlgorithmTags.SHA256 && algorithm <= HashAlgorithmTags.SHA224)
+            if (algorithm == HashAlgorithmTags.SHA1
+            || (algorithm >= HashAlgorithmTags.SHA256 && algorithm <= HashAlgorithmTags.SHA224))
             {
                 dig = helper.createMessageDigest("SHA-" + digestName.substring(3));
             }

pg/src/test/java/org/bouncycastle/openpgp/test/OperatorJcajceTest.java

@@ -207,6 +207,20 @@ public void operation()
     public void testJcaPGPDigestCalculatorProviderBuilder()
         throws Exception
     {
+
+        PGPDigestCalculatorProvider digCalcBldr = new JcaPGPDigestCalculatorProviderBuilder().setProvider(new NonDashProvider()).build();
+        testDigestCalc(digCalcBldr.get(HashAlgorithmTags.SHA256), Hex.decode("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"));
+
+        PGPDigestCalculatorProvider digCalcBldr2 = new JcaPGPDigestCalculatorProviderBuilder().setProvider(new DashProvider()).build();
+        testDigestCalc(digCalcBldr2.get(HashAlgorithmTags.SHA256), Hex.decode("ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad"));
+
+        PGPDigestCalculatorProvider digCalcBldr3 = new JcaPGPDigestCalculatorProviderBuilder().setProvider(new NonDashProvider()).build();
+        testDigestCalc(digCalcBldr3.get(HashAlgorithmTags.SHA1), Hex.decode("a9993e364706816aba3e25717850c26c9cd0d89d"));
+
+        PGPDigestCalculatorProvider digCalcBldr4 = new JcaPGPDigestCalculatorProviderBuilder().setProvider(new DashProvider()).build();
+        testDigestCalc(digCalcBldr4.get(HashAlgorithmTags.SHA1), Hex.decode("a9993e364706816aba3e25717850c26c9cd0d89d"));
+
+
         final PGPDigestCalculatorProvider provider = new JcaPGPDigestCalculatorProviderBuilder().setProvider(new NullProvider()).build();
         testException("exception on setup: ", "PGPException", new TestExceptionOperation()
         {
@@ -310,4 +324,27 @@ private class NullProvider
              super("NULL", 0.0, "Null Provider");
         }
     }
+
+    private class NonDashProvider
+        extends Provider
+    {
+        NonDashProvider()
+        {
+            super("NonDash", 0.0, "NonDash Provider");
+            putService(new Provider.Service(this, "MessageDigest", "SHA256", "org.bouncycastle.openpgp.test.SHA256", null, null));
+            putService(new Provider.Service(this, "MessageDigest", "SHA1", "org.bouncycastle.openpgp.test.SHA1", null, null));
+        }
+    }
+
+    private class DashProvider
+        extends Provider
+    {
+        DashProvider()
+        {
+            super("Dash", 0.0, "Dash Provider");
+            putService(new Service(this, "MessageDigest", "SHA-256", "org.bouncycastle.openpgp.test.SHA256", null, null));
+            putService(new Service(this, "MessageDigest", "SHA-1", "org.bouncycastle.openpgp.test.SHA1", null, null));
+        }
+    }
+
 }

pg/src/test/java/org/bouncycastle/openpgp/test/SHA1.java

@@ -0,0 +1,23 @@
+package org.bouncycastle.openpgp.test;
+
+import org.bouncycastle.crypto.digests.SHA1Digest;
+import org.bouncycastle.jcajce.provider.digest.BCMessageDigest;
+
+public class SHA1
+    extends BCMessageDigest
+    implements Cloneable
+{
+    public SHA1()
+    {
+        super(new SHA1Digest());
+    }
+
+    public Object clone()
+        throws CloneNotSupportedException
+    {
+        SHA1 d = (SHA1)super.clone();
+        d.digest = new SHA1Digest((SHA1Digest)digest);
+
+        return d;
+    }
+}

pg/src/test/java/org/bouncycastle/openpgp/test/SHA256.java

@@ -0,0 +1,23 @@
+package org.bouncycastle.openpgp.test;
+
+import org.bouncycastle.crypto.digests.SHA256Digest;
+import org.bouncycastle.jcajce.provider.digest.BCMessageDigest;
+
+public class SHA256
+    extends BCMessageDigest
+    implements Cloneable
+{
+    public SHA256()
+    {
+        super(SHA256Digest.newInstance());
+    }
+
+    public Object clone()
+        throws CloneNotSupportedException
+    {
+        SHA256 d = (SHA256)super.clone();
+        d.digest = SHA256Digest.newInstance(digest);
+
+        return d;
+    }
+}