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add: added a noncedistance method

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iceman 2016-02-15 02:46:48 +01:00
commit a70fcfb655
1 changed files with 10 additions and 0 deletions
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armsrc/crypto1.c
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@ -141,3 +141,13 @@ uint32_t prng_successor(uint32_t x, uint32_t n)
return SWAPENDIAN(x); 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);
}