1 files changed, 140 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/tls/CertificateRequest.java b/core/src/main/java/org/bouncycastle/crypto/tls/CertificateRequest.java
new file mode 100644
index 00000000..00bf9508
--- /dev/null
+++ b/core/src/main/java/org/bouncycastle/crypto/tls/CertificateRequest.java
@@ -0,0 +1,140 @@
+package org.bouncycastle.crypto.tls;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Vector;
+
+import org.bouncycastle.asn1.ASN1Encoding;
+import org.bouncycastle.asn1.ASN1Primitive;
+import org.bouncycastle.asn1.x500.X500Name;
+
+/**
+ * Parsing and encoding of a <i>CertificateRequest</i> struct from RFC 4346.
+ * <p/>
+ * <pre>
+ * struct {
+ *     ClientCertificateType certificate_types<1..2^8-1>;
+ *     DistinguishedName certificate_authorities<3..2^16-1>;
+ * } CertificateRequest;
+ * </pre>
+ *
+ * @see ClientCertificateType
+ * @see X500Name
+ */
+public class CertificateRequest
+{
+    private short[] certificateTypes;
+    private Vector certificateAuthorities;
+
+    /*
+     * TODO RFC 5264 7.4.4 A list of the hash/signature algorithm pairs that the server is able to
+     * verify, listed in descending order of preference.
+     */
+
+    /**
+     * @param certificateTypes       see {@link ClientCertificateType} for valid constants.
+     * @param certificateAuthorities a {@link Vector} of {@link X500Name}.
+     */
+    public CertificateRequest(short[] certificateTypes, Vector certificateAuthorities)
+    {
+        this.certificateTypes = certificateTypes;
+        this.certificateAuthorities = certificateAuthorities;
+    }
+
+    /**
+     * @return an array of certificate types
+     * @see {@link ClientCertificateType}
+     */
+    public short[] getCertificateTypes()
+    {
+        return certificateTypes;
+    }
+
+    /**
+     * @return a {@link Vector} of {@link X500Name}
+     */
+    public Vector getCertificateAuthorities()
+    {
+        return certificateAuthorities;
+    }
+
+    /**
+     * Encode this {@link CertificateRequest} to an {@link OutputStream}.
+     *
+     * @param output the {@link OutputStream} to encode to.
+     * @throws IOException
+     */
+    public void encode(OutputStream output)
+        throws IOException
+    {
+
+        if (certificateTypes == null || certificateTypes.length == 0)
+        {
+            TlsUtils.writeUint8((short)0, output);
+        }
+        else
+        {
+            TlsUtils.writeUint8((short)certificateTypes.length, output);
+            TlsUtils.writeUint8Array(certificateTypes, output);
+        }
+
+        if (certificateAuthorities == null || certificateAuthorities.isEmpty())
+        {
+            TlsUtils.writeUint16(0, output);
+        }
+        else
+        {
+
+            Vector encDNs = new Vector(certificateAuthorities.size());
+            int totalLength = 0;
+            for (int i = 0; i < certificateAuthorities.size(); ++i)
+            {
+                X500Name authorityDN = (X500Name)certificateAuthorities.elementAt(i);
+                byte[] encDN = authorityDN.getEncoded(ASN1Encoding.DER);
+                encDNs.addElement(encDN);
+                totalLength += encDN.length;
+            }
+
+            TlsUtils.writeUint16(totalLength, output);
+
+            for (int i = 0; i < encDNs.size(); ++i)
+            {
+                byte[] encDN = (byte[])encDNs.elementAt(i);
+                output.write(encDN);
+            }
+        }
+    }
+
+    /**
+     * Parse a {@link CertificateRequest} from an {@link InputStream}.
+     *
+     * @param input the {@link InputStream} to parse from.
+     * @return a {@link CertificateRequest} object.
+     * @throws IOException
+     */
+    public static CertificateRequest parse(InputStream input)
+        throws IOException
+    {
+        int numTypes = TlsUtils.readUint8(input);
+        short[] certificateTypes = new short[numTypes];
+        for (int i = 0; i < numTypes; ++i)
+        {
+            certificateTypes[i] = TlsUtils.readUint8(input);
+        }
+
+        byte[] authorities = TlsUtils.readOpaque16(input);
+
+        Vector authorityDNs = new Vector();
+
+        ByteArrayInputStream bis = new ByteArrayInputStream(authorities);
+        while (bis.available() > 0)
+        {
+            byte[] dnBytes = TlsUtils.readOpaque16(bis);
+            authorityDNs.addElement(X500Name.getInstance(ASN1Primitive.fromByteArray(dnBytes)));
+        }
+
+        return new CertificateRequest(certificateTypes, authorityDNs);
+    }
+}