X-Git-Url: https://www.flypig.org.uk/git/?p=libcontrac.git;a=blobdiff_plain;f=include%2Fcontrac%2Fcontrac.h;h=e9a059e00ca04545a577e55735c6810674f8c35b;hp=ca298472aaa04d0f6d6ea8b337628f0fe2dd43e2;hb=f8c83387f5abffa94e59332382441a71f5b95545;hpb=37e2b9b3573a05390190a25052ceb23d8dab0132

diff --git a/include/contrac/contrac.h b/include/contrac/contrac.h
index ca29847..e9a059e 100644
--- a/include/contrac/contrac.h
+++ b/include/contrac/contrac.h
@@ -1,19 +1,31 @@
-/** \ingroup contrac
+/** \ingroup KeyGeneration
  * @file
- * @author	David Llewellyn-Jones
+ * @author	David Llewellyn-Jones <david@flypig.co.uk>
  * @version	$(VERSION)
  *
  * @section LICENSE
  *
+ * Copyright David Llewellyn-Jones, 2020
+ * Released under the GPLv2.
  *
- *
- * @brief
+ * @brief Core Contact Tracing functionality 
  * @section DESCRIPTION
  *
+ * This class provides the core Contact Tracing functionality. It provides an
+ * interfaces for:
+ * 1. Generating a random Tracing Key.
+ * 2. Generating a Daily Tracing Key based on the current day number.
+ * 3. Generating a Rolling Proximity Identifier based on the current time
+ *    interval number.
  *
+ * Values can be extracted and set in binary or base64 format.
  *
  */
 
+/** \addtogroup KeyGeneration
+ *  @{
+ */
+
 #ifndef __CONTRAC_H
 #define __CONTRAC_H
 
@@ -25,11 +37,24 @@
 // Defines
 
 // Data sizes in bytes
+
+/**
+ * The size in bytes of a Tracing Key in binary format
+ */
 #define TK_SIZE (32)
+
+/**
+ * The size in bytes of a Tracing Key in base64 format
+ */
 #define TK_SIZE_BASE64 (44)
 
 // Structures
 
+/**
+ * An opaque structure for storing the main state.
+ * 
+ * The internal structure can be found in contrac.c
+ */
 typedef struct _Contrac Contrac;
 
 // Function prototypes
@@ -43,19 +68,21 @@ bool contrac_set_time_interval_number(Contrac * data, uint8_t time_interval_numb
 bool contrac_update_current_time(Contrac * data);
 bool contrac_get_initialised(Contrac const * data);
 
-const unsigned char * contrac_get_tracing_key(Contrac const * data);
+unsigned char const * contrac_get_tracing_key(Contrac const * data);
 void contrac_get_tracing_key_base64(Contrac const * data, char * base64);
 
 void contrac_set_tracing_key(Contrac * data, unsigned char const * tracing_key);
 bool contrac_set_tracing_key_base64(Contrac * data, char const * tracing_key);
 
-const unsigned char * contrac_get_daily_key(Contrac const * data);
+unsigned char const * contrac_get_daily_key(Contrac const * data);
 void contrac_get_daily_key_base64(Contrac const * data, char * base64);
 
-const unsigned char * contrac_get_proximity_id(Contrac const * data);
+unsigned char const * contrac_get_proximity_id(Contrac const * data);
 void contrac_get_proximity_id_base64(Contrac const * data, char * base64);
 
 // Function definitions
 
 #endif // __CONTRAC_H
 
+/** @} addtogroup KeyGeneration */
+