Tests and documentation for base64.

base64.h

@@ -9,7 +9,26 @@ namespace i2p
 namespace data
 {
 
+    
+    /*
+     * Base64 encodes an array of bytes.
+     * @return the number of characters in the output buffer
+     * @param InBuffer array of input bytes to be encoded 
+     * @param InCount length of the input array
+     * @param OutBuffer array of output characters 
+     * @param len length of the output buffer
+     */
     size_t ByteStreamToBase64 (const uint8_t * InBuffer, size_t InCount, char * OutBuffer, size_t len);
+
+    /**
+     * Decodes base 64 encoded data to an array of bytes.
+     * @return the number of bytes in the output buffer
+     * @param InBuffer array of input characters to be decoded
+     * @param InCount length of the input array
+     * @param OutBuffer array of output bytes
+     * @param len length of the output buffer
+     * @todo Do not return a negative value on failure, size_t could be unsigned.
+     */
     size_t Base64ToByteStream (const char * InBuffer, size_t InCount, uint8_t * OutBuffer, size_t len );
     const char * GetBase64SubstitutionTable ();