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| 1 | +# SPDX-FileCopyrightText: 2026 PN5180-tagomatic contributors |
| 2 | +# SPDX-License-Identifier: GPL-3.0-or-later |
| 3 | + |
| 4 | +"""ISO 15693 card implementation.""" |
| 5 | + |
| 6 | +from __future__ import annotations |
| 7 | + |
| 8 | +from .constants import ISO15693Command |
| 9 | +from .proxy import PN5180Error, PN5180Helper |
| 10 | + |
| 11 | + |
| 12 | +class ISO15693Card: |
| 13 | + """Represents a connected ISO 15693 card. |
| 14 | +
|
| 15 | + This class provides methods to interact with a card that has been |
| 16 | + successfully connected via the SELECT command. |
| 17 | + """ |
| 18 | + |
| 19 | + def __init__(self, reader: PN5180Helper, uid: bytes) -> None: |
| 20 | + """Initialize ISO15693. |
| 21 | +
|
| 22 | + Args: |
| 23 | + reader: The PN5180 reader instance. |
| 24 | + uid: The card's UID. |
| 25 | + """ |
| 26 | + self._reader = reader |
| 27 | + self._uid = uid |
| 28 | + self._block_size = -1 |
| 29 | + self._num_blocks = 32 |
| 30 | + |
| 31 | + @property |
| 32 | + def uid(self) -> bytes: |
| 33 | + """Get the card's UID.""" |
| 34 | + return self._uid |
| 35 | + |
| 36 | + def read_memory( |
| 37 | + self, start_block: int = 0, num_blocks: int = 255 |
| 38 | + ) -> bytes: |
| 39 | + """Read memory from card. |
| 40 | +
|
| 41 | + Args: |
| 42 | + start_block: Starting block number (default: 0). |
| 43 | + num_blocks: Number of pages to read (default: 255). |
| 44 | +
|
| 45 | + Returns: |
| 46 | + All read memory as a single bytes object. |
| 47 | +
|
| 48 | + Raises: |
| 49 | + PN5180Error: If communication with the card fails. |
| 50 | + """ |
| 51 | + self._reader.turn_on_crc() |
| 52 | + self._reader.change_mode_to_transceiver() |
| 53 | + |
| 54 | + memory_content = self._reader.send_and_receive_15693( |
| 55 | + ISO15693Command.READ_MULTIPLE_BLOCKS, |
| 56 | + bytes([start_block, num_blocks - 1]), |
| 57 | + ) |
| 58 | + |
| 59 | + if len(memory_content) > 0 and memory_content[0] & 1: |
| 60 | + memory_content += b"\0" |
| 61 | + raise PN5180Error( |
| 62 | + "Got error while reading memory", memory_content[1] |
| 63 | + ) |
| 64 | + if len(memory_content) < 2: |
| 65 | + # No more data available |
| 66 | + return b"" |
| 67 | + |
| 68 | + return memory_content[1:] |
| 69 | + |
| 70 | + def get_system_information(self) -> dict[str, int]: |
| 71 | + """Get System information from card. |
| 72 | +
|
| 73 | + Returns: |
| 74 | + The system info as a single bytes object. |
| 75 | +
|
| 76 | + Raises: |
| 77 | + PN5180Error: If communication with the card fails. |
| 78 | + """ |
| 79 | + self._reader.turn_on_crc() |
| 80 | + self._reader.change_mode_to_transceiver() |
| 81 | + |
| 82 | + system_info = self._reader.send_and_receive_15693( |
| 83 | + ISO15693Command.GET_SYSTEM_INFORMATION, |
| 84 | + b"", |
| 85 | + ) |
| 86 | + |
| 87 | + if len(system_info) > 0 and system_info[0] & 1: |
| 88 | + system_info += b"\0" |
| 89 | + raise PN5180Error("Got error while reading memory", system_info[1]) |
| 90 | + if len(system_info) < 1: |
| 91 | + system_info += b"\0" |
| 92 | + |
| 93 | + pos = 9 |
| 94 | + result = {} |
| 95 | + if system_info[0] & 1: |
| 96 | + result["dsfid"] = system_info[pos] |
| 97 | + pos += 1 |
| 98 | + if system_info[0] & 2: |
| 99 | + result["afi"] = system_info[pos] |
| 100 | + pos += 1 |
| 101 | + if system_info[0] & 4: |
| 102 | + result["num_blocks"] = system_info[pos] |
| 103 | + pos += 1 |
| 104 | + result["block_size"] = system_info[pos] + 1 |
| 105 | + pos += 1 |
| 106 | + if system_info[0] & 8: |
| 107 | + result["num_blocks"] = system_info[pos] |
| 108 | + pos += 1 |
| 109 | + result["ic_reference"] = system_info[pos] + 1 |
| 110 | + pos += 1 |
| 111 | + |
| 112 | + return result |
| 113 | + |
| 114 | + def write_memory(self, start_block: int, data: bytes) -> None: |
| 115 | + """Write memory to a non-MIFARE Classic ISO 14443-A card. |
| 116 | +
|
| 117 | + Args: |
| 118 | + block: Starting block number (default: 0). |
| 119 | + data: <block size> bytes |
| 120 | +
|
| 121 | + Raises: |
| 122 | + PN5180Error: If communication with the card fails. |
| 123 | + """ |
| 124 | + |
| 125 | + if self._block_size < 0: |
| 126 | + sys_info = self.get_system_information() |
| 127 | + self._block_size = sys_info.get("block_size", 4) |
| 128 | + self._num_blocks = sys_info.get("num_blocks", 32) |
| 129 | + |
| 130 | + if len(data) % self._block_size != 0: |
| 131 | + raise ValueError( |
| 132 | + f"data isn't an even multiple of the block size ({self._block_size})" |
| 133 | + ) |
| 134 | + |
| 135 | + self._reader.turn_on_crc() |
| 136 | + self._reader.change_mode_to_transceiver() |
| 137 | + |
| 138 | + num_blocks = len(data) // self._block_size |
| 139 | + |
| 140 | + # result = self._reader.send_and_receive_15693( |
| 141 | + # ISO15693Command.WRITE_MULTIPLE_BLOCKS, |
| 142 | + # bytes([ |
| 143 | + # start_block, |
| 144 | + # num_blocks - 1, |
| 145 | + # ]) + data) |
| 146 | + |
| 147 | + for block in range(num_blocks): |
| 148 | + print(f"Writing block {block}") |
| 149 | + result = self._reader.send_and_receive_15693( |
| 150 | + ISO15693Command.WRITE_SINGLE_BLOCK, |
| 151 | + bytes( |
| 152 | + [ |
| 153 | + block + start_block, |
| 154 | + ] |
| 155 | + ) |
| 156 | + + data[ |
| 157 | + block * self._block_size : (block + 1) * self._block_size |
| 158 | + ], |
| 159 | + ) |
| 160 | + if len(result) < 1 or result[0] & 1: |
| 161 | + result += b"\0\0" |
| 162 | + raise PN5180Error( |
| 163 | + f"Got error response when writing to block {start_block + block}", |
| 164 | + result[1], |
| 165 | + ) |
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