From: iceman1001 <iceman@iuse.se>
Date: Thu, 4 Aug 2016 19:52:32 +0000 (+0200)
Subject: CHG: trying to unify the crc algos in one place.
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/commitdiff_plain/82e690f48baa721b264405585a280e0df7d1eb5e

CHG: trying to unify the crc algos in one place.
---

diff --git a/common/crc.c b/common/crc.c
index 0425a4fd..72e6f024 100644
--- a/common/crc.c
+++ b/common/crc.c
@@ -82,7 +82,6 @@ uint32_t CRC8Maxim(uint8_t *buff, size_t size) {
 	return crc_finish(&crc);
 }
 
-
 // width=4  poly=0xC, reversed poly=0x7  init=0x5   refin=true  refout=true  xorout=0x0000  check=  name="CRC-4/LEGIC"
 // width=8  poly=0x63, reversed poly=0x8D  init=0x55  refin=true  refout=true  xorout=0x0000  check=0xC6  name="CRC-8/LEGIC"
 // the CRC needs to be reversed before returned.
@@ -126,4 +125,21 @@ uint32_t CRC16_CCITT(uint8_t *buff, size_t size) {
 	for ( int i=0; i < size; ++i)
 		crc_update(&crc, buff[i], 8);
 	return  crc_finish(&crc);
+}
+//width=16  poly=0x8408  init=0xffff  refin=false  refout=true  xorout=0xffff  check=0xF0B8  name="CRC-16/ISO/IEC 13239"
+uint32_t CRC16_Iso15693(uint8_t *buff, size_t size) {
+	crc_t crc;
+	crc_init_ref(&crc, 16, 0x8408, 0xFFFF, 0xFFFF, true, false);	
+	for ( int i=0; i < size; ++i)
+		crc_update(&crc, buff[i], 8);
+	return reflect(crc_finish(&crc), 16);
+}
+//width=16  poly=0x8408  init=0xffff  refin=true  refout=true  xorout=0x0BC3  check=0xF0B8  name="CRC-16/ICLASS"
+uint32_t CRC16_ICLASS(uint8_t *buff, size_t size) {
+
+	crc_t crc;
+	crc_init_ref(&crc, 16, 0x8408, 0xFFFF, 0x0BC3, false, false);	
+	for ( int i=0; i < size; ++i)
+		crc_update(&crc, buff[i], 8);
+	return  crc_finish(&crc);
 }
\ No newline at end of file
diff --git a/common/crc.h b/common/crc.h
index 5a9bcfa7..d7314379 100644
--- a/common/crc.h
+++ b/common/crc.h
@@ -68,6 +68,8 @@ uint32_t CRC16Legic(uint8_t *buff, size_t size, uint8_t uidcrc);
 // test crc 16.
 uint32_t CRC16_DNP(uint8_t *buff, size_t size);
 uint32_t CRC16_CCITT(uint8_t *buff, size_t size);
+uint32_t CRC16_Iso15693(uint8_t *buff, size_t size);
+uint32_t CRC16_ICLASS(uint8_t *buff, size_t size);
 
 /* Static initialization of a crc structure */
 #define CRC_INITIALIZER(_order, _polynom, _initial_value, _final_xor) { \
diff --git a/common/iso15693tools.c b/common/iso15693tools.c
index 26e636ca..01fe4889 100644
--- a/common/iso15693tools.c
+++ b/common/iso15693tools.c
@@ -6,14 +6,7 @@
 // ISO15693 CRC & other commons
 //-----------------------------------------------------------------------------
 
-
-#include "proxmark3.h"
-#include <stdint.h>
-#include <stdlib.h>
-//#include "iso15693tools.h"
-
-#define POLY 0x8408
-
+#include "iso15693tools.h"
 
 // The CRC as described in ISO 15693-Part 3-Annex C
 // 	v	buffer with data
@@ -59,11 +52,11 @@ int sprintf(char *str, const char *format, ...);
 //		uid[]		the UID in transmission order
 //	return: ptr to string
 char* Iso15693sprintUID(char *target,uint8_t *uid) {
-  static char tempbuf[2*8+1]="";
-  if (target==NULL) target=tempbuf;
-  sprintf(target,"%02X%02X%02X%02X%02X%02X%02X%02X",
-  				uid[7],uid[6],uid[5],uid[4],uid[3],uid[2],uid[1],uid[0]);
-  return target;
+	static char tempbuf[2*8+1] = "";
+	if (target==NULL) target=tempbuf;
+	sprintf(target,"%02X%02X%02X%02X%02X%02X%02X%02X",
+				uid[7],uid[6],uid[5],uid[4],uid[3],uid[2],uid[1],uid[0]);
+	return target;
 }
 
 uint16_t iclass_crc16(char *data_p, unsigned short length)
diff --git a/common/iso15693tools.h b/common/iso15693tools.h
index ec63728f..cf613cad 100644
--- a/common/iso15693tools.h
+++ b/common/iso15693tools.h
@@ -4,6 +4,13 @@
 #ifndef ISO15693_H__
 #define ISO15693_H__
 
+#include "proxmark3.h"
+#include <stdint.h>
+#include <stdlib.h>
+
+#define POLY 0x8408
+
+
 // ISO15693 CRC
 #define ISO15_CRC_PRESET	(uint16_t)0xFFFF
 #define ISO15_CRC_POLY		(uint16_t)0x8408