X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;f=entropium.h;h=7b4081e1971c819eaadd68e40f851900ed22fcd8;hb=4d76909e4282baf1420ee309e270384246b241b8;hp=02aa3172faf3d5146a4b57bbb344c6a7947a3c52;hpb=96ebafd201c9e8441c7677577b24aa402c1defc6;p=avr-crypto-lib.git

diff --git a/entropium.h b/entropium.h
index 02aa317..7b4081e 100644
--- a/entropium.h
+++ b/entropium.h
@@ -16,6 +16,7 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
+
 /**
  * File:		entropium.h
  * Author:		Daniel Otte
@@ -24,6 +25,15 @@
  * Description:	This file contains the declarations for the pseudo-random-number generator.
  **/
 
+/**
+ * \file    entropium.h
+ * \author  Daniel Otte
+ * \date    23.07.2006
+ * \license	GPLv3 or later
+ * \brief	This file contains the declarations for the pseudo-random-number generator.
+ **/
+
+
 #ifndef ENTROPIUM_H_
 #define ENTROPIUM_H_
 
@@ -33,11 +43,42 @@
  */
 #define ENTROPIUM_RANDOMBLOCK_SIZE 32 /* bytes */
  
+/** \fn void entropium_addEntropy(unsigned length_b, const void* data)
+ * \brief add entropy to the prng
+ * 
+ * This function adds data to the internal entropy pool
+ * \param length_b length of the data block in bits
+ * \param data pointer to the data
+ */
 void entropium_addEntropy(unsigned length_b, const void* data); 
+
+/** \fn void entropium_getRandomBlock(void* b)
+ * \brief generate a fixed size block of random data 
+ * 
+ * This function writes 32 bytes of random extracted from the entropy pool
+ * in the supplied buffer.
+ * \param b buffer where the random data gets written
+ */
 void entropium_getRandomBlock(void* b);
-/* this does some simple buffering */
+
+/** \fn uint8_t entropium_getRandomByte(void)
+ * \brief get a single byte of random data
+ * 
+ * This function utilizes a internal buffer which gets automatically filled
+ * again. 
+ * \return a byte of random data
+ */ 
 uint8_t entropium_getRandomByte(void);
 
+/** \fn void entropium_fillBlockRandom(void* block, unsigned length_B)
+ * \brief get a block of random data
+ * 
+ * This function writes random data extracted from the entropy pool in the 
+ * supplied buffer. It shares a internal buffer with the 
+ * entropium_getRandomByte() function.
+ * \param block pointer to the buffer where the random data goes
+ * \param length_B number of bytes to be written to the buffer
+ */
 void entropium_fillBlockRandom(void* block, unsigned length_B);
 
 #endif /*PRNG_H_*/