ClassNotFoundException BouncyCastleProvider exception

Summary

GroupDocs.Viewer for Java API depends on Bouncy Castle for encryption and decryption features, that is; if the program is required to load or save encrypted spreadsheets, it is required to add reference of bcprov-jdk16-1.46.jar in the project’s class path.

Symptoms

You may get exception like java.lang.ClassNotFoundException: org.bouncycastle.jce.provider.BouncyCastleProvider.

Solution

The solution is actually very simple as detailed below.

  • Download bcprov-jdk16-1.46.jar library as JAR file from Maven repository.
  • Put the file into your project directory.
  • Reference the bcprov-jdk16-1.46.jar in the class path of the project.

Alternatively, you can add the dependency in the pom.xml and let the project resolve the dependency via maven.

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk16</artifactId>
    <version>1.46</version>
</dependency>

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

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Along with full-featured Java library we provide simple but powerful free Apps. You are welcome to view Word, PDF, Excel, PowerPoint documents with free to use online GroupDocs Viewer App.