mashalling state

Signed-off-by: Mattias Andrée <maandree@operamail.com>

2 files changed, 13 insertions, 0 deletions

diff --git a/src/libsha2/state.c b/src/libsha2/state.c
index e907cec..fb6b4fc 100644
--- a/src/libsha2/state.c
+++ b/src/libsha2/state.c
@@ -79,6 +79,7 @@ int libsha2_state_initialise(libsha2_state_t* restrict state, libsha2_algorithm_
   
   size_t i;
   
+  memset(state, 0, sizeof(*state));
   state->message_size = 0;
   state->algorithm = algorithm;
   
diff --git a/src/libsha2/state.h b/src/libsha2/state.h
index 1dfd4be..1ac2667 100644
--- a/src/libsha2/state.h
+++ b/src/libsha2/state.h
@@ -71,6 +71,12 @@ typedef enum libsha2_algorithm
  * exposing two versions of each function: one to wipe data,
  * and one not to wipe data to gain speed, now you can use use
  * `explicit_bzero` (or `memset`) when you are done.
+ * 
+ * This datastructure is flat (it contains dynamic pointers)
+ * and can be marshalled and unmarshalled naïvely, and does
+ * not need destroyed; however, if you when to marshall it
+ * using as little memory as possible, this are comments
+ * about data that does not need to be mashalled
  */
 typedef struct libsha2_state
 {
@@ -98,6 +104,8 @@ typedef struct libsha2_state
   
   /**
    * Words
+   * 
+   * Does not need to be marshalled
    */
   union
   {
@@ -132,6 +140,8 @@ typedef struct libsha2_state
   
   /**
    * Temporary hashing values
+   * 
+   * Does not need to be marshalled
    */
   union
   {
@@ -156,6 +166,8 @@ typedef struct libsha2_state
   /**
    * Space for storing the last bits and
    * the padding
+   * 
+   * Does not need to be marshalled
    */
   char appendix[256];