X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/af4308b97b5973fa2165f39797626e79c5f2f806..1c07ca92c3b9338697a0f2fc0e41790164815aeb:/client/mifarehost.c

diff --git a/client/mifarehost.c b/client/mifarehost.c
index 72c1e897..b7cd3b59 100644
--- a/client/mifarehost.c
+++ b/client/mifarehost.c
@@ -125,8 +125,8 @@ int mfnested(uint8_t blockNo, uint8_t keyType, uint8_t * key, uint8_t trgBlockNo
 	p4->even = 0; p4->odd = 0;
 	statelists[0].len = p3 - statelists[0].head.slhead;
 	statelists[1].len = p4 - statelists[1].head.slhead;
-	statelists[0].tail.sltail=--p3;
-	statelists[1].tail.sltail=--p4;
+	statelists[0].tail.sltail = --p3;
+	statelists[1].tail.sltail = --p4;
 
 	// the statelists now contain possible keys. The key we are searching for must be in the
 	// intersection of both lists. Create the intersection:
@@ -203,6 +203,53 @@ int mfCheckKeys (uint8_t blockNo, uint8_t keyType, bool clear_trace, uint8_t key
 	*key = bytes_to_num(resp.d.asBytes, 6);
 	return 0;
 }
+// PM3 imp of J-Run mf_key_brute (part 2)
+// ref: https://github.com/J-Run/mf_key_brute
+int mfKeyBrute(uint8_t blockNo, uint8_t keyType, uint8_t *key, uint64_t *resultkey){
+
+	#define KEYS_IN_BLOCK 85
+	#define KEYBLOCK_SIZE 510
+	#define CANDIDATE_SIZE 0xFFFF * 6
+	uint8_t found = FALSE;
+	uint64_t key64 = 0;
+	uint8_t candidates[CANDIDATE_SIZE] = {0x00};
+	uint8_t keyBlock[KEYBLOCK_SIZE] = {0x00};
+
+	memset(candidates, 0, sizeof(candidates));
+	memset(keyBlock, 0, sizeof(keyBlock));
+	
+	// Generate all possible keys for the first two unknown bytes.
+	for (uint16_t i = 0; i < 0xFFFF; ++i) {		
+		uint32_t j = i * 6;		
+		candidates[0 + j] = i >> 8;	
+		candidates[1 + j] = i;
+		candidates[2 + j] = key[2];
+		candidates[3 + j] = key[3];
+		candidates[4 + j] = key[4];
+		candidates[5 + j] = key[5];
+	}
+	uint32_t counter, i;
+	for ( i = 0, counter = 1; i < CANDIDATE_SIZE; i += KEYBLOCK_SIZE, ++counter){
+
+		key64 = 0;
+		
+		// copy candidatekeys to test key block
+		memcpy(keyBlock, candidates + i, KEYBLOCK_SIZE);
+
+		// check a block of generated candidate keys.
+		if (!mfCheckKeys(blockNo, keyType, TRUE, KEYS_IN_BLOCK, keyBlock, &key64)) {
+			*resultkey = key64;
+			found = TRUE;
+			break;
+		}
+		
+		// progress 
+		if ( counter % 20 == 0 )
+			PrintAndLog("tried : %s.. \t %u keys", sprint_hex(candidates + i, 6),  counter * KEYS_IN_BLOCK  );
+	}
+	return found;
+}
+
 
 // EMULATOR
 
@@ -365,14 +412,20 @@ int loadTraceCard(uint8_t *tuid, uint8_t uidlen) {
 		memset(buf, 0, sizeof(buf));
 		if (fgets(buf, sizeof(buf), f) == NULL) {
 			PrintAndLog("No trace file found or reading error.");
-			fclose(f);
+			if (f) {
+				fclose(f);
+				f = NULL;
+			}
 			return 2;
 		}
 
 		if (strlen(buf) < 32){
 			if (feof(f)) break;
 			PrintAndLog("File content error. Block data must include 32 HEX symbols");
-			fclose(f);
+			if (f) {
+				fclose(f);
+				f = NULL;
+			}
 			return 2;
 		}
 		for (i = 0; i < 32; i += 2)
@@ -382,7 +435,10 @@ int loadTraceCard(uint8_t *tuid, uint8_t uidlen) {
 
 		blockNum++;
 	}
-	fclose(f);
+	if (f) {
+		fclose(f);
+		f = NULL;
+	}
 	return 0;
 }
 
@@ -400,7 +456,10 @@ int saveTraceCard(void) {
 		fprintf(f,"\n");
 	}
 	fflush(f);
-	fclose(f);
+	if (f) {
+		fclose(f);
+		f = NULL;
+	}
 	return 0;
 }
 
@@ -607,12 +666,12 @@ int mfTraceDecode(uint8_t *data_src, int len, bool wantSaveToEmlFile) {
 
 int tryDecryptWord(uint32_t nt, uint32_t ar_enc, uint32_t at_enc, uint8_t *data, int len){
 	PrintAndLog("\nEncrypted data: [%s]", sprint_hex(data, len) );
-	struct Crypto1State *pcs = NULL;
+	struct Crypto1State *s;
 	ks2 = ar_enc ^ prng_successor(nt, 64);
 	ks3 = at_enc ^ prng_successor(nt, 96);
-	pcs = lfsr_recovery64(ks2, ks3);
-	mf_crypto1_decrypt(pcs, data, len, FALSE);
+	s = lfsr_recovery64(ks2, ks3);
+	mf_crypto1_decrypt(s, data, len, FALSE);
 	PrintAndLog("Decrypted data: [%s]", sprint_hex(data, len) );
-	crypto1_destroy(pcs);
+	crypto1_destroy(s);
 	return 0;
 }