X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/ed6f29f31736440f04743a62bfa0e1917044275e..6e49717b5e025b6ac7139b00f2f39d3b22b424a1:/armsrc/mifareutil.c

diff --git a/armsrc/mifareutil.c b/armsrc/mifareutil.c
index 97f7b3d1..e5ef6c19 100644
--- a/armsrc/mifareutil.c
+++ b/armsrc/mifareutil.c
@@ -24,23 +24,27 @@
 int MF_DBGLEVEL = MF_DBG_ALL;
 
 // crypto1 helpers
-void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
+void mf_crypto1_decryptEx(struct Crypto1State *pcs, uint8_t *data_in, int len, uint8_t *data_out){
 	uint8_t	bt = 0;
 	int i;
 	
 	if (len != 1) {
 		for (i = 0; i < len; i++)
-			data[i] = crypto1_byte(pcs, 0x00, 0) ^ data[i];
+			data_out[i] = crypto1_byte(pcs, 0x00, 0) ^ data_in[i];
 	} else {
 		bt = 0;
 		for (i = 0; i < 4; i++)
-			bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data[0], i)) << i;
+			bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(data_in[0], i)) << i;
 				
-		data[0] = bt;
+		data_out[0] = bt;
 	}
 	return;
 }
 
+void mf_crypto1_decrypt(struct Crypto1State *pcs, uint8_t *data, int len){
+	mf_crypto1_decryptEx(pcs, data, len, data);
+}
+
 void mf_crypto1_encrypt(struct Crypto1State *pcs, uint8_t *data, uint16_t len, uint8_t *par) {
 	uint8_t bt = 0;
 	int i;