fixed iso14443a-4 similation, got rid of many ugly memory allocation issues

[proxmark3-svn] / client / nonce2key / crapto1.c

diff --git a/client/nonce2key/crapto1.c b/client/nonce2key/crapto1.c
index fc878a0deb83eef6e5034ee0d3d0166fe870ec8f..c509581cfe75ea69e91097191b0b61fe4bb641a9 100644 (file)
--- a/client/nonce2key/crapto1.c
+++ b/client/nonce2key/crapto1.c
@@ -507,7 +507,7 @@ uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd)
  */\r
 static struct Crypto1State*\r
 brute_top(uint32_t prefix, uint32_t rresp, unsigned char parities[8][8],\r
-          uint32_t odd, uint32_t even, struct Crypto1State* sl)\r
+          uint32_t odd, uint32_t even, struct Crypto1State* sl, uint8_t no_chk)\r
 {\r
        struct Crypto1State s;\r
        uint32_t ks1, nr, ks2, rr, ks3, good, c;\r
@@ -525,6 +525,9 @@ brute_top(uint32_t prefix, uint32_t rresp, unsigned char parities[8][8],
                \r
                sl->odd = s.odd;\r
                sl->even = s.even;\r
+               \r
+               if (no_chk)\r
+                       break;\r
        \r
                ks1 = crypto1_word(&s, prefix | c << 5, 1);\r
                ks2 = crypto1_word(&s,0,0);\r
@@ -557,7 +560,7 @@ brute_top(uint32_t prefix, uint32_t rresp, unsigned char parities[8][8],
  * tag nonce was fed in\r
  */\r
 struct Crypto1State*\r
-lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8])\r
+lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8], uint8_t no_par)\r
 {\r
        struct Crypto1State *statelist, *s;\r
        uint32_t *odd, *even, *o, *e, top;\r
@@ -565,21 +568,21 @@ lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8])
        odd = lfsr_prefix_ks(ks, 1);\r
        even = lfsr_prefix_ks(ks, 0);\r
 \r
-       statelist = malloc((sizeof *statelist) << 20);\r
+       statelist = malloc((sizeof *statelist) << 21);  //how large should be? \r
        if(!statelist || !odd || !even)\r
                 return 0;\r
 \r
-\r
        s = statelist;\r
-       for(o = odd; *o != 0xffffffff; ++o)\r
-               for(e = even; *e != 0xffffffff; ++e)\r
+       for(o = odd; *o != -1; ++o)\r
+               for(e = even; *e != -1; ++e)\r
                        for(top = 0; top < 64; ++top) {\r
                                *o = (*o & 0x1fffff) | (top << 21);\r
                                *e = (*e & 0x1fffff) | (top >> 3) << 21;\r
-                               s = brute_top(pfx, rr, par, *o, *e, s);\r
+                               s = brute_top(pfx, rr, par, *o, *e, s, no_par);\r
                        }\r
 \r
-       s->odd = s->even = 0;\r
+       s->odd = s->even = -1;  \r
+       //printf("state count = %d\n",s-statelist);\r
 \r
        free(odd);\r
        free(even);\r