X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/cceabb79e6f1bc8e9c2cab766f6edb3a4200bb74..refs/pull/225/head:/armsrc/mifareutil.c

diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index cc54b740..8ef364c2 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -18,6 +18,7 @@
 #include "iso14443a.h"
 #include "crapto1.h"
 #include "mifareutil.h"
+#include "des.h"
 
 int MF_DBGLEVEL = MF_DBG_ALL;
 
@@ -64,53 +65,25 @@ uint8_t mf_crypto1_encrypt4bit(struct Crypto1State *pcs, uint8_t data) {
 	return bt;
 }
 
-// send commands
-int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
+// send X byte basic commands
+int mifare_sendcmd(uint8_t cmd, uint8_t* data, uint8_t data_size, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
 {
-	return mifare_sendcmd_shortex(pcs, crypted, cmd, data, answer, answer_parity, timing);
-}
-
-int mifare_sendcmd_short_special(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t* data, uint8_t* answer, uint8_t *answer_parity, uint32_t *timing)
-{
-	uint8_t dcmd[8];
-    dcmd[0] = cmd;
-    dcmd[1] = data[0];
-	dcmd[2] = data[1];
-	dcmd[3] = data[2];
-	dcmd[4] = data[3];
-	dcmd[5] = data[4];
-	AppendCrc14443a(dcmd, 6);
-	ReaderTransmit(dcmd, sizeof(dcmd), NULL);
-	int len = ReaderReceive(answer, answer_parity);
-	if(!len) {
-                if (MF_DBGLEVEL >= 1)   Dbprintf("Authentication failed. Card timeout.");
-                return 2;
-    }
-	return len;
-}
-
-int mifare_sendcmd_short_mfucauth(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t *data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
-{
-    uint8_t dcmd[19];
-	int len; 
-    dcmd[0] = cmd;
-    memcpy(dcmd+1,data,16);
-	AppendCrc14443a(dcmd, 17);
-	
+	uint8_t dcmd[data_size+3];
+	dcmd[0] = cmd;
+	memcpy(dcmd+1,data,data_size);
+	AppendCrc14443a(dcmd, data_size+1);
 	ReaderTransmit(dcmd, sizeof(dcmd), timing);
-	len = ReaderReceive(answer, answer_parity);
+	int len = ReaderReceive(answer, answer_parity);
 	if(!len) {
-        if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("Authentication failed. Card timeout.");
-        len = ReaderReceive(answer,answer_parity);
-    }
-    if(len==1)	{
-		if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("NAK - Authentication failed.");
-		return 1;
-        }
+		if (MF_DBGLEVEL >= MF_DBG_ERROR)   Dbprintf("%02X Cmd failed. Card timeout.", cmd);
+			len = ReaderReceive(answer,answer_parity);
+		//return 0;
+	}
 	return len;
 }
 
-int mifare_sendcmd_shortex(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
+// send 2 byte commands
+int mifare_sendcmd_short(struct Crypto1State *pcs, uint8_t crypted, uint8_t cmd, uint8_t data, uint8_t *answer, uint8_t *answer_parity, uint32_t *timing)
 {
 	uint8_t dcmd[4], ecmd[4];
 	uint16_t pos, res;
@@ -288,68 +261,114 @@ int mifare_classic_readblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blo
 }
 
 // mifare ultralight commands
-int mifare_ul_ev1_auth(uint8_t *key, uint8_t *pack){
+int mifare_ul_ev1_auth(uint8_t *keybytes, uint8_t *pack){
 
 	uint16_t len;
-	uint8_t receivedAnswer[MAX_FRAME_SIZE];
-	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
-	
-	len = mifare_sendcmd_short_mfucauth(NULL, 0, 0x1B, key, receivedAnswer, receivedAnswerPar, NULL);
+	uint8_t resp[4];
+	uint8_t respPar[1];
+	uint8_t key[4] = {0x00};
+	memcpy(key, keybytes, 4);
+
+	if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
+		Dbprintf("EV1 Auth : %02x%02x%02x%02x",	key[0], key[1], key[2], key[3]);
+	len = mifare_sendcmd(0x1B, key, sizeof(key), resp, respPar, NULL);
+	//len = mifare_sendcmd_short_mfuev1auth(NULL, 0, 0x1B, key, resp, respPar, NULL);
 	if (len != 4) {
-		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", receivedAnswer[0], len);
-		return 1;
-	}
-	
-	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
-		Dbprintf("Auth Resp: %02x%02x%02x%02x",
-			receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3]);
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x %u", resp[0], len);
+		return 0;
 	}
-	memcpy(pack, receivedAnswer, 4);
-	return 0;
+
+	if (MF_DBGLEVEL >= MF_DBG_EXTENDED)
+		Dbprintf("Auth Resp: %02x%02x%02x%02x", resp[0],resp[1],resp[2],resp[3]);
+
+	memcpy(pack, resp, 4);
+	return 1;
 }
 
-int mifare_ultra_auth1(uint8_t *blockData){
+int mifare_ultra_auth(uint8_t *keybytes){
+
+	/// 3des2k
+
+	uint8_t random_a[8] = {1,1,1,1,1,1,1,1};
+	uint8_t random_b[8] = {0x00};
+	uint8_t enc_random_b[8] = {0x00};
+	uint8_t rnd_ab[16] = {0x00};
+	uint8_t IV[8] = {0x00};
+	uint8_t key[16] = {0x00};
+	memcpy(key, keybytes, 16);
 
 	uint16_t len;
-	uint8_t receivedAnswer[MAX_FRAME_SIZE];
-	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
-	
-	len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, receivedAnswer,receivedAnswerPar ,NULL);
+	uint8_t resp[19] = {0x00};
+	uint8_t respPar[3] = {0,0,0};
+
+	// REQUEST AUTHENTICATION
+	len = mifare_sendcmd_short(NULL, 1, 0x1A, 0x00, resp, respPar ,NULL);
 	if (len != 11) {
-		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
-		return 1;
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
+		return 0;
 	}
 
+	// tag nonce.
+	memcpy(enc_random_b,resp+1,8);
+
+	// decrypt nonce.
+	tdes_2key_dec(random_b, enc_random_b, sizeof(random_b), key, IV );
+	rol(random_b,8);
+	memcpy(rnd_ab  ,random_a,8);
+	memcpy(rnd_ab+8,random_b,8);
+
 	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
-		Dbprintf("Auth1 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
-			receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
-			receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
-			receivedAnswer[10]);
-		}
-	memcpy(blockData, receivedAnswer, 11);
-	return 0;
-}
+		Dbprintf("enc_B: %02x %02x %02x %02x %02x %02x %02x %02x",
+			enc_random_b[0],enc_random_b[1],enc_random_b[2],enc_random_b[3],enc_random_b[4],enc_random_b[5],enc_random_b[6],enc_random_b[7]);
 
-int mifare_ultra_auth2(uint8_t *key, uint8_t *blockData){
+		Dbprintf("    B: %02x %02x %02x %02x %02x %02x %02x %02x",
+			random_b[0],random_b[1],random_b[2],random_b[3],random_b[4],random_b[5],random_b[6],random_b[7]);
 
-	uint16_t len;
-	uint8_t receivedAnswer[MAX_FRAME_SIZE];
-	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
-	
-	len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, key, receivedAnswer, receivedAnswerPar, NULL);
+		Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
+				rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
+
+		Dbprintf("rnd_ab: %02x %02x %02x %02x %02x %02x %02x %02x",
+				rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15] );
+	}
+
+	// encrypt    out, in, length, key, iv
+	tdes_2key_enc(rnd_ab, rnd_ab, sizeof(rnd_ab), key, enc_random_b);
+	//len = mifare_sendcmd_short_mfucauth(NULL, 1, 0xAF, rnd_ab, resp, respPar, NULL);
+	len = mifare_sendcmd(0xAF, rnd_ab, sizeof(rnd_ab), resp, respPar, NULL);
 	if (len != 11) {
-		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
-		return 1;
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", resp[0]);
+		return 0;
 	}
-	
+
+	uint8_t enc_resp[8] = { 0,0,0,0,0,0,0,0 };
+	uint8_t resp_random_a[8] = { 0,0,0,0,0,0,0,0 };
+	memcpy(enc_resp, resp+1, 8);
+
+	// decrypt    out, in, length, key, iv 
+	tdes_2key_dec(resp_random_a, enc_resp, 8, key, enc_random_b);
+	if ( memcmp(resp_random_a, random_a, 8) != 0 ) {
+		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("failed authentication");
+		return 0;
+	}
+
 	if (MF_DBGLEVEL >= MF_DBG_EXTENDED) {
-		Dbprintf("Auth2 Resp: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
-			receivedAnswer[0],receivedAnswer[1],receivedAnswer[2],receivedAnswer[3],receivedAnswer[4],
-			receivedAnswer[5],receivedAnswer[6],receivedAnswer[7],receivedAnswer[8],receivedAnswer[9],
-			receivedAnswer[10]);
+		Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x", 
+				rnd_ab[0],rnd_ab[1],rnd_ab[2],rnd_ab[3],
+				rnd_ab[4],rnd_ab[5],rnd_ab[6],rnd_ab[7]);
+
+		Dbprintf("e_AB: %02x %02x %02x %02x %02x %02x %02x %02x",
+				rnd_ab[8],rnd_ab[9],rnd_ab[10],rnd_ab[11],
+				rnd_ab[12],rnd_ab[13],rnd_ab[14],rnd_ab[15]);
+
+		Dbprintf("a: %02x %02x %02x %02x %02x %02x %02x %02x",
+				random_a[0],random_a[1],random_a[2],random_a[3],
+				random_a[4],random_a[5],random_a[6],random_a[7]);
+
+		Dbprintf("b: %02x %02x %02x %02x %02x %02x %02x %02x",
+				resp_random_a[0],resp_random_a[1],resp_random_a[2],resp_random_a[3],
+				resp_random_a[4],resp_random_a[5],resp_random_a[6],resp_random_a[7]);
 	}
-	memcpy(blockData, receivedAnswer, 11);
-	return 0;
+	return 1;
 }
 
 int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
@@ -359,6 +378,7 @@ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 	uint8_t receivedAnswer[MAX_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 	
+
 	len = mifare_sendcmd_short(NULL, 1, 0x30, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 	if (len == 1) {
 		if (MF_DBGLEVEL >= MF_DBG_ERROR) Dbprintf("Cmd Error: %02x", receivedAnswer[0]);
@@ -380,8 +400,6 @@ int mifare_ultra_readblock(uint8_t blockNo, uint8_t *blockData)
 	return 0;
 }
 
-
-
 int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t blockNo, uint8_t *blockData) 
 {
 	// variables
@@ -429,7 +447,8 @@ int mifare_classic_writeblock(struct Crypto1State *pcs, uint32_t uid, uint8_t bl
 	return 0;
 }
 
-int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData) 
+/* // command not needed, but left for future testing
+int mifare_ultra_writeblock_compat(uint8_t blockNo, uint8_t *blockData) 
 {
 	uint16_t len;
 	uint8_t par[3] = {0};  // enough for 18 parity bits
@@ -437,7 +456,6 @@ int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 	uint8_t receivedAnswer[MAX_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 
-	// command MIFARE_CLASSIC_WRITEBLOCK
 	len = mifare_sendcmd_short(NULL, true, 0xA0, blockNo, receivedAnswer, receivedAnswerPar, NULL);
 
 	if ((len != 1) || (receivedAnswer[0] != 0x0A)) {   //  0x0a - ACK
@@ -460,20 +478,21 @@ int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 	}
 	return 0;
 }
+*/
 
-int mifare_ultra_special_writeblock(uint8_t blockNo, uint8_t *blockData)
+int mifare_ultra_writeblock(uint8_t blockNo, uint8_t *blockData)
 {
 	uint16_t len;
-	uint8_t d_block[8] = {0x00};
+	uint8_t d_block[5] = {0x00};
 	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
 	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 
 	// command MIFARE_CLASSIC_WRITEBLOCK
 	d_block[0]= blockNo;
 	memcpy(d_block+1,blockData,4);
-	AppendCrc14443a(d_block, 6);
+	//AppendCrc14443a(d_block, 6);
 
-	len = mifare_sendcmd_short_special(NULL, 1, 0xA2, d_block, receivedAnswer, receivedAnswerPar, NULL);
+	len = mifare_sendcmd(0xA2, d_block, sizeof(d_block), receivedAnswer, receivedAnswerPar, NULL);
 
 	if (receivedAnswer[0] != 0x0A) {   //  0x0a - ACK
 		if (MF_DBGLEVEL >= MF_DBG_ERROR)
@@ -664,8 +683,8 @@ int mifare_desfire_des_auth1(uint32_t uid, uint8_t *blockData){
 	int len;
 	// load key, keynumber
 	uint8_t data[2]={0x0a, 0x00};
-	uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
-	uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
+	uint8_t receivedAnswer[MAX_FRAME_SIZE];
+	uint8_t receivedAnswerPar[MAX_PARITY_SIZE];
 	
 	len = mifare_sendcmd_special(NULL, 1, 0x02, data, receivedAnswer,receivedAnswerPar,NULL);
 	if (len == 1) {