adding PEMParser fuzz test for [bc-java] (#8278)

projects/bc-java/PEMParserFuzzer.java

@@ -0,0 +1,43 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+import com.code_intelligence.jazzer.api.FuzzedDataProvider;
+
+import java.io.Reader;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.io.ByteArrayInputStream;
+import org.bouncycastle.openssl.PEMParser;
+import java.io.IOException;
+import org.bouncycastle.util.encoders.DecoderException;
+
+public class PEMParserFuzzer {
+  public static void fuzzerTestOneInput(FuzzedDataProvider data) {
+    ByteArrayInputStream bais = new ByteArrayInputStream(data.consumeRemainingAsBytes());
+    Reader reader = new BufferedReader(new InputStreamReader(bais));
+    PEMParser pemparser = new PEMParser(reader);
+
+    try{
+      while (pemparser.readObject() != null){
+        //empty body
+      }
+    }
+    catch(IOException | DecoderException e){
+      return;
+    }
+
+  }
+}