CHG: testing a prng_successor_one method

[proxmark3-svn] / armsrc / crypto1.c

diff --git a/armsrc/crypto1.c b/armsrc/crypto1.c
index 98d38b2bf2189ad4a65047e263669e6a67b53c84..993c05e7f095795115c1697bb90eb2b8c80f7c02 100644 (file)
--- a/armsrc/crypto1.c
+++ b/armsrc/crypto1.c
@@ -141,3 +141,12 @@ uint32_t prng_successor(uint32_t x, uint32_t n)
 
        return SWAPENDIAN(x);
 }
+
+uint32_t prng_successor_one(uint32_t x)
+{
+       SWAPENDIAN(x);
+
+       x = x >> 1 | (x >> 16 ^ x >> 18 ^ x >> 19 ^ x >> 21) << 31;
+
+       return SWAPENDIAN(x);
+}
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