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https://github.com/RfidResearchGroup/proxmark3.git
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58 lines
2.3 KiB
C
58 lines
2.3 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// See LICENSE.txt for the text of the license.
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//-----------------------------------------------------------------------------
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// Weigand card format packing/unpacking support functions
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//-----------------------------------------------------------------------------
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#ifndef WIEGAND_FORMATUTILS_H__
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#define WIEGAND_FORMATUTILS_H__
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdbool.h>
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// Structure for packed wiegand messages
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// Always align lowest value (last transmitted) bit to ordinal position 0 (lowest valued bit bottom)
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typedef struct {
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uint8_t Length; // Number of encoded bits in wiegand message (excluding headers and preamble)
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uint32_t Top; // Bits in x<<64 positions
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uint32_t Mid; // Bits in x<<32 positions
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uint32_t Bot; // Lowest ordinal positions
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} wiegand_message_t;
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// Structure for unpacked wiegand card, like HID prox
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typedef struct {
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uint32_t FacilityCode;
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uint64_t CardNumber;
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uint32_t IssueLevel;
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uint32_t OEM;
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bool ParityValid; // Only valid for responses
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} wiegand_card_t;
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uint8_t get_bit_by_position(wiegand_message_t *data, uint8_t pos);
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bool set_bit_by_position(wiegand_message_t *data, bool value, uint8_t pos);
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uint64_t get_linear_field(wiegand_message_t *data, uint8_t firstBit, uint8_t length);
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bool set_linear_field(wiegand_message_t *data, uint64_t value, uint8_t firstBit, uint8_t length);
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uint64_t get_nonlinear_field(wiegand_message_t *data, uint8_t numBits, uint8_t *bits);
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bool set_nonlinear_field(wiegand_message_t *data, uint64_t value, uint8_t numBits, uint8_t *bits);
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wiegand_message_t initialize_message_object(uint32_t top, uint32_t mid, uint32_t bot, int n);
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bool add_HID_header(wiegand_message_t *data);
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#endif
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