X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d95878f8022707b9e66e7ec7c22403459371d7d4..605ae1892874a438c5c7d72c5a13e78e1ef0ebbe:/common/crapto1/crapto1.c

diff --git a/common/crapto1/crapto1.c b/common/crapto1/crapto1.c
index 9187460b..fe6eb0f6 100644
--- a/common/crapto1/crapto1.c
+++ b/common/crapto1/crapto1.c
@@ -99,7 +99,7 @@ static void bucket_sort_intersect(uint32_t* const estart, uint32_t* const estop,
 /** binsearch
  * Binary search for the first occurence of *stop's MSB in sorted [start,stop]
  */
-static inline uint32_t* binsearch(uint32_t *start, uint32_t *stop)
+/* static inline uint32_t* binsearch(uint32_t *start, uint32_t *stop)
 {
 	uint32_t mid, val = *stop & 0xff000000;
 	while(start != stop)
@@ -110,7 +110,7 @@ static inline uint32_t* binsearch(uint32_t *start, uint32_t *stop)
 
 	return start;
 }
-
+ */
 /** update_contribution
  * helper, calculates the partial linear feedback contributions and puts in MSB
  */
@@ -425,6 +425,17 @@ int nonce_distance(uint32_t from, uint32_t to)
 	}
 	return (65535 + dist[to >> 16] - dist[from >> 16]) % 65535;
 }
+/** validate_prng_nonce
+ * Determine if nonce is deterministic. ie: Suspectable to Darkside attack.
+ * returns
+ *   true = weak prng
+ *   false = hardend prng
+ */
+bool validate_prng_nonce(uint32_t nonce) {
+	// init prng table:
+	nonce_distance(nonce, nonce);
+	return ((65535 - dist[nonce >> 16] + dist[nonce & 0xffff]) % 65535) == 16;
+}
 
 
 static uint32_t fastfwd[2][8] = {