I pulled this example from the following link. I am having problems because I can't get the compiler to find the CMSProcessableInputStream class.

Does anyone have any suggestions?

<https://apache.googlesource.com/pdfbox/+/5f032354760374773f7339bbad2678d3281e90ee/examples/src/main/java/org/apache/pdfbox/examples/signature/CreateVisibleSignature.java>

This is a snippet of my pom.xml:

```
        <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>1.8.9</version>
    </dependency>
   <dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.6</version>
   </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcpg-jdk16</artifactId>
        <version>1.46</version>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-jdk16</artifactId>
        <version>1.46</version>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcmail-jdk16</artifactId>
        <version>1.46</version>
    </dependency>
    <dependency>
        <groupId>org.bouncycastle</groupId>
        <artifactId>bcprov-ext-jdk16</artifactId>
        <version>1.46</version>
    </dependency>

```

This is the code:

```
    @Override
public byte[] sign(InputStream content) throws SignatureException,
        IOException {
    CMSProcessableInputStream input = new CMSProcessableInputStream(content);
    CMSSignedDataGenerator gen = new CMSSignedDataGenerator();
    // CertificateChain
    List<Certificate> certList = Arrays.asList(cert);
    CertStore certStore = null;
    try {
        certStore = CertStore.getInstance("Collection",
                new CollectionCertStoreParameters(certList), provider);
        gen.addSigner(privKey, (X509Certificate) certList.get(0),
                CMSSignedGenerator.DIGEST_SHA256);
        gen.addCertificatesAndCRLs(certStore);
        CMSSignedData signedData = gen.generate(input, false, provider);
        return signedData.getEncoded();
    } catch (Exception e) {
        // should be handled
        System.err.println("Error while creating pkcs7 signature.");
        e.printStackTrace();
    }
    throw new RuntimeException("Problem while preparing signature");
}

```