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Export ISO14443A CRC function. Thanks to Romain Tartière.

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This commit is contained in:
Romuald Conty 2010-03-31 10:09:06 +00:00
parent 667ba72dbd
commit a78cae1c15
2 changed files with 9 additions and 3 deletions
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1
src/include/nfc/nfc.h
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@ -75,6 +75,7 @@ NFC_EXPORT bool nfc_target_send_dep_bytes(const nfc_device_t* pnd, const byte_t*
NFC_EXPORT const char* nfc_device_name(nfc_device_t* pnd); NFC_EXPORT const char* nfc_device_name(nfc_device_t* pnd);
/* Misc. functions */ /* Misc. functions */
NFC_EXPORT void iso14443a_crc(byte_t* pbtData, size_t szLen, byte_t* pbtCrc);
NFC_EXPORT const char* nfc_version(void); NFC_EXPORT const char* nfc_version(void);
#ifdef __cplusplus #ifdef __cplusplus

11
src/lib/bitutils.c
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@ -128,7 +128,7 @@ uint64_t swap_endian64(const void* pui64)
return (((ui64N&0xFF)<<56)+((ui64N&0xFF00)<<40)+((ui64N&0xFF0000)<<24)+((ui64N&0xFF000000)<<8)+((ui64N&0xFF00000000ull)>>8)+((ui64N&0xFF0000000000ull)>>24)+((ui64N&0xFF000000000000ull)>>40)+((ui64N&0xFF00000000000000ull)>>56)); return (((ui64N&0xFF)<<56)+((ui64N&0xFF00)<<40)+((ui64N&0xFF0000)<<24)+((ui64N&0xFF000000)<<8)+((ui64N&0xFF00000000ull)>>8)+((ui64N&0xFF0000000000ull)>>24)+((ui64N&0xFF000000000000ull)>>40)+((ui64N&0xFF00000000000000ull)>>56));
} }
void append_iso14443a_crc(byte_t* pbtData, size_t szLen) void iso14443a_crc(byte_t* pbtData, size_t szLen, byte_t* pbtCrc)
{ {
byte_t bt; byte_t bt;
uint32_t wCrc = 0x6363; uint32_t wCrc = 0x6363;
@ -140,8 +140,13 @@ void append_iso14443a_crc(byte_t* pbtData, size_t szLen)
wCrc = (wCrc >> 8)^((uint32_t)bt << 8)^((uint32_t)bt<<3)^((uint32_t)bt>>4); wCrc = (wCrc >> 8)^((uint32_t)bt << 8)^((uint32_t)bt<<3)^((uint32_t)bt>>4);
} while (--szLen); } while (--szLen);
*pbtData++ = (byte_t) (wCrc & 0xFF); *pbtCrc++ = (byte_t) (wCrc & 0xFF);
*pbtData = (byte_t) ((wCrc >> 8) & 0xFF); *pbtCrc = (byte_t) ((wCrc >> 8) & 0xFF);
}
void append_iso14443a_crc(byte_t* pbtData, size_t szLen)
{
iso14443a_crc(pbtData, szLen, pbtData + szLen);
} }
void print_hex(const byte_t* pbtData, const size_t szBytes) void print_hex(const byte_t* pbtData, const size_t szBytes)