FIX: Better legic annotation, show which byte was targeted during read and write...

[proxmark3-svn] / common / crc.c

diff --git a/common/crc.c b/common/crc.c
index 311a676c47eb617dde16cda2767795ec398d3b9d..72e6f0248751001e44210e412cabcc76ad5370d4 100644 (file)
--- 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.
@@ -99,8 +98,8 @@ uint32_t CRC8Legic(uint8_t *buff, size_t size) {
 uint32_t CRC16Legic(uint8_t *buff, size_t size, uint8_t uidcrc) {
 
        #define CRC16_POLY_LEGIC 0xB400
-       //uint8_t initial = reflect(uidcrc, 8);
-       uint16_t initial = uidcrc;
+       uint16_t initial = reflect(uidcrc, 8);
+       //uint16_t initial = uidcrc;
        initial |= initial << 8;
        crc_t crc;
        crc_init_ref(&crc, 16, CRC16_POLY_LEGIC, initial, 0, TRUE, TRUE);
@@ -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);
 }
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