Re: [PATCH] Add A5/3-4 cipher support

#include <stdio.h> #include <stdint.h>

static inline uint32_t osmo_a5_fn_count(uint32_t fn) { int t1 = fn / (26 * 51); int t2 = fn % 26; int t3 = fn % 51; return (t1 << 11) | (t3 << 5) | t2; }

static inline uint32_t osmo_a5_fn(uint32_t fn_count) { int t1 = fn_count >> 11; int t2 = fn_count & 0x1f; int t3 = (fn_count >> 5) & 0x3f; return (t1 * 26 * 51) + ((t3 - t2 + 26) % 26) * 51 + t3; }

#define FN_MAX 26*51*2048

int main(int argc, char *argv[]) { int i; for (i=0; i<FN_MAX; i++) if (i != osmo_a5_fn(osmo_a5_fn_count(i))) printf("%d\n", i);

}