mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-09-25 01:36:12 +08:00
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) 2019 Merlok
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//
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// This code is licensed to you under the terms of the GNU GPL, version 2 or,
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// at your option, any later version. See the LICENSE.txt file for the text of
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// the license.
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//-----------------------------------------------------------------------------
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// NFC Data Exchange Format (NDEF) functions
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//-----------------------------------------------------------------------------
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#include "ndef.h"
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#include "ui.h"
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uint16_t ndefTLVGetLength(uint8_t *data, size_t *indx) {
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uint16_t len = 0;
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if (data[0] == 0xff) {
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len = (data[1] << 8) + data[2];
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*indx += 3;
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} else {
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len = data[0];
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*indx += 1;
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}
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return len;
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}
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int NDEFDecodeAndPrint(uint8_t *ndef, size_t ndefLen, bool verbose) {
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size_t indx = 0;
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while (indx < ndefLen) {
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switch (ndef[indx]) {
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case 0x00: {
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indx++;
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uint16_t len = ndefTLVGetLength(&ndef[indx], &indx);
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PrintAndLogEx(INFO, "NDEF NULL block.");
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if (len)
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PrintAndLogEx(WARNING, "NDEF NULL block size must be 0 instead of %d.", len);
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indx += len;
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break;
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}
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case 0x03: {
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indx++;
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uint16_t len = ndefTLVGetLength(&ndef[indx], &indx);
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PrintAndLogEx(INFO, "NDEF message. len: %d", len);
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// ndef decode
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indx += len;
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break;
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}
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case 0xfd: {
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indx++;
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uint16_t len = ndefTLVGetLength(&ndef[indx], &indx);
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PrintAndLogEx(INFO, "NDEF proprietary info. Skipped %d bytes.", len);
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indx += len;
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break;
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}
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case 0xfe: {
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PrintAndLogEx(INFO, "NDEF Terminator. Done.");
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return 0;
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break;
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}
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default: {
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PrintAndLogEx(ERR, "unknown tag 0x%02x", ndef[indx]);
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return 1;
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}
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}
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}
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return 0;
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}
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