--- a/libtomcrypt/src/prngs/sprng.c	Thu Feb 08 23:11:40 2018 +0800
+++ b/libtomcrypt/src/prngs/sprng.c	Fri Feb 09 21:44:05 2018 +0800
@@ -5,8 +5,6 @@
  *
  * The library is free for all purposes without any express
  * guarantee it works.
- *
- * Tom St Denis, [email protected], http://libtom.org
  */
 #include "tomcrypt.h"
 
@@ -14,7 +12,7 @@
    @file sprng.c
    Secure PRNG, Tom St Denis
 */
-   
+
 /* A secure PRNG using the RNG functions.  Basically this is a
  * wrapper that allows you to use a secure RNG as a PRNG
  * in the various other functions.
@@ -39,10 +37,11 @@
   Start the PRNG
   @param prng     [out] The PRNG state to initialize
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_start(prng_state *prng)
 {
-   return CRYPT_OK;  
+   LTC_UNUSED_PARAM(prng);
+   return CRYPT_OK;
 }
 
 /**
@@ -51,9 +50,12 @@
   @param inlen    Length of the data to add
   @param prng     PRNG state to update
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_add_entropy(const unsigned char *in, unsigned long inlen, prng_state *prng)
 {
+   LTC_UNUSED_PARAM(in);
+   LTC_UNUSED_PARAM(inlen);
+   LTC_UNUSED_PARAM(prng);
    return CRYPT_OK;
 }
 
@@ -61,9 +63,10 @@
   Make the PRNG ready to read from
   @param prng   The PRNG to make active
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_ready(prng_state *prng)
 {
+   LTC_UNUSED_PARAM(prng);
    return CRYPT_OK;
 }
 
@@ -73,10 +76,11 @@
   @param outlen   Length of output
   @param prng     The active PRNG to read from
   @return Number of octets read
-*/  
+*/
 unsigned long sprng_read(unsigned char *out, unsigned long outlen, prng_state *prng)
 {
    LTC_ARGCHK(out != NULL);
+   LTC_UNUSED_PARAM(prng);
    return rng_get_bytes(out, outlen, NULL);
 }
 
@@ -84,9 +88,10 @@
   Terminate the PRNG
   @param prng   The PRNG to terminate
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_done(prng_state *prng)
 {
+   LTC_UNUSED_PARAM(prng);
    return CRYPT_OK;
 }
 
@@ -96,41 +101,61 @@
   @param outlen    [in/out] Max size and resulting size of the state
   @param prng      The PRNG to export
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_export(unsigned char *out, unsigned long *outlen, prng_state *prng)
 {
    LTC_ARGCHK(outlen != NULL);
+   LTC_UNUSED_PARAM(out);
+   LTC_UNUSED_PARAM(prng);
 
    *outlen = 0;
    return CRYPT_OK;
 }
- 
+
 /**
   Import a PRNG state
   @param in       The PRNG state
   @param inlen    Size of the state
   @param prng     The PRNG to import
   @return CRYPT_OK if successful
-*/  
+*/
 int sprng_import(const unsigned char *in, unsigned long inlen, prng_state *prng)
 {
+  LTC_UNUSED_PARAM(in);
+  LTC_UNUSED_PARAM(inlen);
+  LTC_UNUSED_PARAM(prng);
    return CRYPT_OK;
 }
 
 /**
   PRNG self-test
   @return CRYPT_OK if successful, CRYPT_NOP if self-testing has been disabled
-*/  
+*/
 int sprng_test(void)
 {
+#ifndef LTC_TEST
+   return CRYPT_NOP;
+#else
+   prng_state st;
+   unsigned char en[] = { 0x01, 0x02, 0x03, 0x04 };
+   unsigned char out[1000];
+   int err;
+
+   if ((err = sprng_start(&st)) != CRYPT_OK)                         return err;
+   if ((err = sprng_add_entropy(en, sizeof(en), &st)) != CRYPT_OK)   return err;
+   if ((err = sprng_ready(&st)) != CRYPT_OK)                         return err;
+   if (sprng_read(out, 500, &st) != 500)                             return CRYPT_ERROR_READPRNG; /* skip 500 bytes */
+   if ((err = sprng_done(&st)) != CRYPT_OK)                          return err;
+
    return CRYPT_OK;
+#endif
 }
 
 #endif
 
 
- 
+
 
-/* $Source$ */
-/* $Revision$ */
-/* $Date$ */
+/* ref:         $Format:%D$ */
+/* git commit:  $Format:%H$ */
+/* commit time: $Format:%ai$ */