ADD: added a reference to a generic CRC-8 checksum algo in common/crc.c

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

diff --git a/client/nonce2key/crapto1.c b/client/nonce2key/crapto1.c
index fc878a0deb83eef6e5034ee0d3d0166fe870ec8f..1d7441c7fee996bc34ba9b783b8713b8efacbc54 100644 (file)
--- a/client/nonce2key/crapto1.c
+++ b/client/nonce2key/crapto1.c
@@ -46,7 +46,7 @@ typedef struct bucket_info {
                } bucket_info[2][0x100];\r
                uint32_t numbuckets;\r
        } bucket_info_t;\r
-       \r
+\r
 \r
 static void bucket_sort_intersect(uint32_t* const estart, uint32_t* const estop,\r
                                                                  uint32_t* const ostart, uint32_t* const ostop,\r
@@ -55,28 +55,28 @@ static void bucket_sort_intersect(uint32_t* const estart, uint32_t* const estop,
        uint32_t *p1, *p2;\r
        uint32_t *start[2];\r
        uint32_t *stop[2];\r
-       \r
+\r
        start[0] = estart;\r
        stop[0] = estop;\r
        start[1] = ostart;\r
        stop[1] = ostop;\r
-       \r
+\r
        // init buckets to be empty\r
        for (uint32_t i = 0; i < 2; i++) {\r
                for (uint32_t j = 0x00; j <= 0xff; j++) {\r
                        bucket[i][j].bp = bucket[i][j].head;\r
                }\r
        }\r
-       \r
+\r
        // sort the lists into the buckets based on the MSB (contribution bits)\r
-       for (uint32_t i = 0; i < 2; i++) { \r
+       for (uint32_t i = 0; i < 2; i++) {\r
                for (p1 = start[i]; p1 <= stop[i]; p1++) {\r
                        uint32_t bucket_index = (*p1 & 0xff000000) >> 24;\r
                        *(bucket[i][bucket_index].bp++) = *p1;\r
                }\r
        }\r
 \r
-       \r
+\r
        // write back intersecting buckets as sorted list.\r
        // fill in bucket_info with head and tail of the bucket contents in the list and number of non-empty buckets.\r
        uint32_t nonempty_bucket;\r
@@ -95,32 +95,6 @@ static void bucket_sort_intersect(uint32_t* const estart, uint32_t* const estop,
                }\r
 }\r
 \r
-\r
-static void quicksort(uint32_t* const start, uint32_t* const stop)\r
-{\r
-       uint32_t *it = start + 1, *rit = stop;\r
-\r
-       if(it > rit)\r
-               return;\r
-\r
-       while(it < rit)\r
-               if(*it <= *start)\r
-                       ++it;\r
-               else if(*rit > *start)\r
-                       --rit;\r
-               else\r
-                       *it ^= (*it ^= *rit, *rit ^= *it);\r
-\r
-       if(*rit >= *start)\r
-               --rit;\r
-       if(rit != start)\r
-               *rit ^= (*rit ^= *start, *start ^= *rit);\r
-\r
-       quicksort(start, rit - 1);\r
-       quicksort(rit + 1, stop);\r
-}\r
-\r
-\r
 /** binsearch\r
  * Binary search for the first occurence of *stop's MSB in sorted [start,stop]\r
  */\r
@@ -173,9 +147,9 @@ extend_table(uint32_t *tbl, uint32_t **end, int bit, int m1, int m2, uint32_t in
                        *p ^= in;\r
                } else {                                                                                // drop\r
                        *p-- = *(*end)--;\r
-               } \r
        }\r
-       \r
+       }\r
+\r
 }\r
 \r
 \r
@@ -185,7 +159,7 @@ extend_table(uint32_t *tbl, uint32_t **end, int bit, int m1, int m2, uint32_t in
 static inline void\r
 extend_table_simple(uint32_t *tbl, uint32_t **end, int bit)\r
 {\r
-       for(*tbl <<= 1; tbl <= *end; *++tbl <<= 1)      \r
+       for(*tbl <<= 1; tbl <= *end; *++tbl <<= 1)\r
                if(filter(*tbl) ^ filter(*tbl | 1)) {   // replace\r
                        *tbl |= filter(*tbl) ^ bit;\r
                } else if(filter(*tbl) == bit) {                // insert\r
@@ -232,13 +206,13 @@ recover(uint32_t *o_head, uint32_t *o_tail, uint32_t oks,
        }\r
 \r
        bucket_sort_intersect(e_head, e_tail, o_head, o_tail, &bucket_info, bucket);\r
-       \r
+\r
        for (int i = bucket_info.numbuckets - 1; i >= 0; i--) {\r
                sl = recover(bucket_info.bucket_info[1][i].head, bucket_info.bucket_info[1][i].tail, oks,\r
                                     bucket_info.bucket_info[0][i].head, bucket_info.bucket_info[0][i].tail, eks,\r
                                         rem, sl, in, bucket);\r
        }\r
-       \r
+\r
        return sl;\r
 }\r
 /** lfsr_recovery\r
@@ -277,7 +251,7 @@ struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in)
                        }\r
                }\r
 \r
-       \r
+\r
        // initialize statelists: add all possible states which would result into the rightmost 2 bits of the keystream\r
        for(i = 1 << 20; i >= 0; --i) {\r
                if(filter(i) == (oks & 1))\r
@@ -308,7 +282,7 @@ out:
        for (uint32_t i = 0; i < 2; i++)\r
                for (uint32_t j = 0; j <= 0xff; j++)\r
                        free(bucket[i][j].head);\r
-       \r
+\r
        return statelist;\r
 }\r
 \r
@@ -408,9 +382,12 @@ struct Crypto1State* lfsr_recovery64(uint32_t ks2, uint32_t ks3)
 void lfsr_rollback_bit(struct Crypto1State *s, uint32_t in, int fb)\r
 {\r
        int out;\r
+       uint32_t tmp;\r
 \r
        s->odd &= 0xffffff;\r
-       s->odd ^= (s->odd ^= s->even, s->even ^= s->odd);\r
+       tmp = s->odd;\r
+       s->odd = s->even;\r
+       s->even = tmp;\r
 \r
        out = s->even & 1;\r
        out ^= LF_POLY_EVEN & (s->even >>= 1);\r
@@ -507,7 +484,7 @@ 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
@@ -515,17 +492,20 @@ brute_top(uint32_t prefix, uint32_t rresp, unsigned char parities[8][8],
        for(c = 0; c < 8; ++c) {\r
                s.odd = odd ^ fastfwd[1][c];\r
                s.even = even ^ fastfwd[0][c];\r
-               \r
+\r
                lfsr_rollback_bit(&s, 0, 0);\r
                lfsr_rollback_bit(&s, 0, 0);\r
                lfsr_rollback_bit(&s, 0, 0);\r
-               \r
+\r
                lfsr_rollback_word(&s, 0, 0);\r
                lfsr_rollback_word(&s, prefix | c << 5, 1);\r
-               \r
+\r
                sl->odd = s.odd;\r
                sl->even = s.even;\r
-       \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
                ks3 = crypto1_word(&s, 0,0);\r
@@ -544,7 +524,7 @@ brute_top(uint32_t prefix, uint32_t rresp, unsigned char parities[8][8],
        }\r
 \r
        return ++sl;\r
-} \r
+}\r
 \r
 \r
 /** lfsr_common_prefix\r
@@ -557,7 +537,7 @@ 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 +545,26 @@ 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
+                               free(statelist);\r
+                               free(odd);\r
+                               free(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