├── README.md ├── pcap2text.py └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | # pcap2text 2 | pcap2text 是 Python 编写的命令行工具，用于解析 pcapng 格式的键盘流量包并还原出键盘文本输入信息。 3 | 4 | ## 安装 5 | 6 | 1. 下载并解压本项目。 7 | 2. 保证 `tshark` 命令可用。 8 | 9 | ## 用法 10 | 11 | ```shell 12 | pcap2text.py [-h] pcapng_file 13 | ``` 14 | -------------------------------------------------------------------------------- /pcap2text.py: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env python 2 | # coding:utf-8 3 | import argparse 4 | import os 5 | from tempfile import NamedTemporaryFile 6 | 7 | BOOT_KEYBOARD_MAP = { 8 | 0x00: (None, None), # Reserved (no event indicated) 9 | 0x01: ('', ''), # ErrorRollOver 10 | 0x02: ('', ''), # POSTFail 11 | 0x03: ('', ''), # ErrorUndefined 12 | 0x04: ('a', 'A'), # a 13 | 0x05: ('b', 'B'), # b 14 | 0x06: ('c', 'C'), # c 15 | 0x07: ('d', 'D'), # d 16 | 0x08: ('e', 'E'), # e 17 | 0x09: ('f', 'F'), # f 18 | 0x0a: ('g', 'G'), # g 19 | 0x0b: ('h', 'H'), # h 20 | 0x0c: ('i', 'I'), # i 21 | 0x0d: ('j', 'J'), # j 22 | 0x0e: ('k', 'K'), # k 23 | 0x0f: ('l', 'L'), # l 24 | 0x10: ('m', 'M'), # m 25 | 0x11: ('n', 'N'), # n 26 | 0x12: ('o', 'O'), # o 27 | 0x13: ('p', 'P'), # p 28 | 0x14: ('q', 'Q'), # q 29 | 0x15: ('r', 'R'), # r 30 | 0x16: ('s', 'S'), # s 31 | 0x17: ('t', 'T'), # t 32 | 0x18: ('u', 'U'), # u 33 | 0x19: ('v', 'V'), # v 34 | 0x1a: ('w', 'W'), # w 35 | 0x1b: ('x', 'X'), # x 36 | 0x1c: ('y', 'Y'), # y 37 | 0x1d: ('z', 'Z'), # z 38 | 0x1e: ('1', '!'), # 1 39 | 0x1f: ('2', '@'), # 2 40 | 0x20: ('3', '#'), # 3 41 | 0x21: ('4', '$'), # 4 42 | 0x22: ('5', '%'), # 5 43 | 0x23: ('6', '^'), # 6 44 | 0x24: ('7', '&'), # 7 45 | 0x25: ('8', '*'), # 8 46 | 0x26: ('9', '('), # 9 47 | 0x27: ('0', ')'), # 0 48 | 0x28: ('\n', '\n'), # Return (ENTER) 49 | 0x29: ('[ESC]', '[ESC]'), # Escape 50 | 0x2a: ('\b', '\b'), # Backspace 51 | 0x2b: ('\t', '\t'), # Tab 52 | 0x2c: (' ', ' '), # Spacebar 53 | 0x2d: ('-', '_'), # - 54 | 0x2e: ('=', '+'), # = 55 | 0x2f: ('[', '{'), # [ 56 | 0x30: (']', '}'), # ] 57 | 0x31: ('\\', '|'), # \ 58 | 0x32: ('', ''), # Non-US # and ~ 59 | 0x33: (';', ':'), # ; 60 | 0x34: ('\'', '"'), # ' 61 | 0x35: ('`', '~'), # ` 62 | 0x36: (',', '<'), # , 63 | 0x37: ('.', '>'), # . 64 | 0x38: ('/', '?'), # / 65 | 0x39: ('[CAPSLOCK]', '[CAPSLOCK]'), # Caps Lock 66 | 0x3a: ('[F1]', '[F1]'), # F1 67 | 0x3b: ('[F2]', '[F2]'), # F2 68 | 0x3c: ('[F3]', '[F3]'), # F3 69 | 0x3d: ('[F4]', '[F4]'), # F4 70 | 0x3e: ('[F5]', '[F5]'), # F5 71 | 0x3f: ('[F6]', '[F6]'), # F6 72 | 0x40: ('[F7]', '[F7]'), # F7 73 | 0x41: ('[F8]', '[F8]'), # F8 74 | 0x42: ('[F9]', '[F9]'), # F9 75 | 0x43: ('[F10]', '[F10]'), # F10 76 | 0x44: ('[F11]', '[F11]'), # F11 77 | 0x45: ('[F12]', '[F12]'), # F12 78 | 0x46: ('[PRINTSCREEN]', '[PRINTSCREEN]'), # Print Screen 79 | 0x47: ('[SCROLLLOCK]', '[SCROLLLOCK]'), # Scroll Lock 80 | 0x48: ('[PAUSE]', '[PAUSE]'), # Pause 81 | 0x49: ('[INSERT]', '[INSERT]'), # Insert 82 | 0x4a: ('[HOME]', '[HOME]'), # Home 83 | 0x4b: ('[PAGEUP]', '[PAGEUP]'), # Page Up 84 | 0x4c: ('[DELETE]', '[DELETE]'), # Delete Forward 85 | 0x4d: ('[END]', '[END]'), # End 86 | 0x4e: ('[PAGEDOWN]', '[PAGEDOWN]'), # Page Down 87 | 0x4f: ('[RIGHTARROW]', '[RIGHTARROW]'), # Right Arrow 88 | 0x50: ('[LEFTARROW]', '[LEFTARROW]'), # Left Arrow 89 | 0x51: ('[DOWNARROW]', '[DOWNARROW]'), # Down Arrow 90 | 0x52: ('[UPARROW]', '[UPARROW]'), # Up Arrow 91 | 0x53: ('[NUMLOCK]', '[NUMLOCK]'), # Num Lock 92 | 0x54: ('[KEYPADSLASH]', '/'), # Keypad / 93 | 0x55: ('[KEYPADASTERISK]', '*'), # Keypad * 94 | 0x56: ('[KEYPADMINUS]', '-'), # Keypad - 95 | 0x57: ('[KEYPADPLUS]', '+'), # Keypad + 96 | 0x58: ('[KEYPADENTER]', '[KEYPADENTER]'), # Keypad ENTER 97 | 0x59: ('[KEYPAD1]', '1'), # Keypad 1 and End 98 | 0x5a: ('[KEYPAD2]', '2'), # Keypad 2 and Down Arrow 99 | 0x5b: ('[KEYPAD3]', '3'), # Keypad 3 and PageDn 100 | 0x5c: ('[KEYPAD4]', '4'), # Keypad 4 and Left Arrow 101 | 0x5d: ('[KEYPAD5]', '5'), # Keypad 5 102 | 0x5e: ('[KEYPAD6]', '6'), # Keypad 6 and Right Arrow 103 | 0x5f: ('[KEYPAD7]', '7'), # Keypad 7 and Home 104 | 0x60: ('[KEYPAD8]', '8'), # Keypad 8 and Up Arrow 105 | 0x61: ('[KEYPAD9]', '9'), # Keypad 9 and Page Up 106 | 0x62: ('[KEYPAD0]', '0'), # Keypad 0 and Insert 107 | 0x63: ('[KEYPADPERIOD]', '.'), # Keypad . and Delete 108 | 0x64: ('', ''), # Non-US \ and | 109 | 0x65: ('', ''), # Application 110 | 0x66: ('', ''), # Power 111 | 0x67: ('[KEYPADEQUALS]', '='), # Keypad = 112 | 0x68: ('[F13]', '[F13]'), # F13 113 | 0x69: ('[F14]', '[F14]'), # F14 114 | 0x6a: ('[F15]', '[F15]'), # F15 115 | 0x6b: ('[F16]', '[F16]'), # F16 116 | 0x6c: ('[F17]', '[F17]'), # F17 117 | 0x6d: ('[F18]', '[F18]'), # F18 118 | 0x6e: ('[F19]', '[F19]'), # F19 119 | 0x6f: ('[F20]', '[F20]'), # F20 120 | 0x70: ('[F21]', '[F21]'), # F21 121 | 0x71: ('[F22]', '[F22]'), # F22 122 | 0x72: ('[F23]', '[F23]'), # F23 123 | 0x73: ('[F24]', '[F24]'), # F24 124 | 0x74: ('', ''), # Execute 125 | 0x75: ('', ''), # Help 126 | 0x76: ('', ''), # Menu 127 | 0x77: ('', ''), # Select 128 | 0x78: ('', ''), # Stop 129 | 0x79: ('', ''), # Again 130 | 0x7a: ('', ''), # Undo 131 | 0x7b: ('', ''), # Cut 132 | 0x7c: ('', ''), # Copy 133 | 0x7d: ('', ''), # Paste 134 | 0x7e: ('', ''), # Find 135 | 0x7f: ('', ''), # Mute 136 | 0x80: ('', ''), # Volume Up 137 | 0x81: ('', ''), # Volume Down 138 | 0x82: ('', ''), # Locking Caps Lock 139 | 0x83: ('', ''), # Locking Num Lock 140 | 0x84: ('', ''), # Locking Scroll Lock 141 | 0x85: ('', ''), # Keypad Comma 142 | 0x86: ('', ''), # Keypad Equal Sign 143 | 0x87: ('', ''), # International1 144 | 0x88: ('', ''), # International2 145 | 0x89: ('', ''), # International3 146 | 0x8a: ('', ''), # International4 147 | 0x8b: ('', ''), # International5 148 | 0x8c: ('', ''), # International6 149 | 0x8d: ('', ''), # International7 150 | 0x8e: ('', ''), # International8 151 | 0x8f: ('', ''), # International9 152 | 0x90: ('', ''), # LANG1 153 | 0x91: ('', ''), # LANG2 154 | 0x92: ('', ''), # LANG3 155 | 0x93: ('', ''), # LANG4 156 | 0x94: ('', ''), # LANG5 157 | 0x95: ('', ''), # LANG6 158 | 0x96: ('', ''), # LANG7 159 | 0x97: ('', ''), # LANG8 160 | 0x98: ('', ''), # LANG9 161 | 0x99: ('', ''), # Alternate Erase 162 | 0x9a: ('', ''), # SysReq/Attention 163 | 0x9b: ('', ''), # Cancel 164 | 0x9c: ('', ''), # Clear 165 | 0x9d: ('', ''), # Prior 166 | 0x9e: ('', ''), # Return 167 | 0x9f: ('', ''), # Separator 168 | 0xa0: ('', ''), # Out 169 | 0xa1: ('', ''), # Oper 170 | 0xa2: ('', ''), # Clear/Again 171 | 0xa3: ('', ''), # CrSel/Props 172 | 0xa4: ('', ''), # ExSel 173 | 0xa5: ('', ''), # Reserved 174 | 0xa6: ('', ''), # Reserved 175 | 0xa7: ('', ''), # Reserved 176 | 0xa8: ('', ''), # Reserved 177 | 0xa9: ('', ''), # Reserved 178 | 0xaa: ('', ''), # Reserved 179 | 0xab: ('', ''), # Reserved 180 | 0xac: ('', ''), # Reserved 181 | 0xad: ('', ''), # Reserved 182 | 0xae: ('', ''), # Reserved 183 | 0xaf: ('', ''), # Reserved 184 | 0xb0: ('', ''), # Keypad 00 185 | 0xb1: ('', ''), # Keypad 000 186 | 0xb2: ('', ''), # Thousands Separator 187 | 0xb3: ('', ''), # Decimal Separator 188 | 0xb4: ('', ''), # Currency Unit 189 | 0xb5: ('', ''), # Currency Sub-unit 190 | 0xb6: ('', ''), # Keypad ( 191 | 0xb7: ('', ''), # Keypad ) 192 | 0xb8: ('', ''), # Keypad { 193 | 0xb9: ('', ''), # Keypad } 194 | 0xba: ('', ''), # Keypad Tab 195 | 0xbb: ('', ''), # Keypad Backspace 196 | 0xbc: ('', ''), # Keypad A 197 | 0xbd: ('', ''), # Keypad B 198 | 0xbe: ('', ''), # Keypad C 199 | 0xbf: ('', ''), # Keypad D 200 | 0xc0: ('', ''), # Keypad E 201 | 0xc1: ('', ''), # Keypad F 202 | 0xc2: ('', ''), # Keypad XOR 203 | 0xc3: ('', ''), # Keypad ^ 204 | 0xc4: ('', ''), # Keypad % 205 | 0xc5: ('', ''), # Keypad < 206 | 0xc6: ('', ''), # Keypad > 207 | 0xc7: ('', ''), # Keypad & 208 | 0xc8: ('', ''), # Keypad && 209 | 0xc9: ('', ''), # Keypad | 210 | 0xca: ('', ''), # Keypad || 211 | 0xcb: ('', ''), # Keypad : 212 | 0xcc: ('', ''), # Keypad # 213 | 0xcd: ('', ''), # Keypad Space 214 | 0xce: ('', ''), # Keypad @ 215 | 0xcf: ('', ''), # Keypad ! 216 | 0xd0: ('', ''), # Keypad Memory Store 217 | 0xd1: ('', ''), # Keypad Memory Recall 218 | 0xd2: ('', ''), # Keypad Memory Clear 219 | 0xd3: ('', ''), # Keypad Memory Add 220 | 0xd4: ('', ''), # Keypad Memory Subtract 221 | 0xd5: ('', ''), # Keypad Memory Multiply 222 | 0xd6: ('', ''), # Keypad Memory Divide 223 | 0xd7: ('', ''), # Keypad +/- 224 | 0xd8: ('', ''), # Keypad Clear 225 | 0xd9: ('', ''), # Keypad Clear Entry 226 | 0xda: ('', ''), # Keypad Binary 227 | 0xdb: ('', ''), # Keypad Octal 228 | 0xdc: ('', ''), # Keypad Decimal 229 | 0xdd: ('', ''), # Keypad Hexadecimal 230 | 0xde: ('', ''), # Reserved 231 | 0xdf: ('', ''), # Reserved 232 | 0xe0: ('', ''), # Left Control 233 | 0xe1: ('', ''), # Left Shift 234 | 0xe2: ('', ''), # Left Alt 235 | 0xe3: ('', ''), # Left GUI 236 | 0xe4: ('', ''), # Right Control 237 | 0xe5: ('', ''), # Right Shift 238 | 0xe6: ('', ''), # Right Alt 239 | 0xe7: ('', ''), # Right GUI 240 | } 241 | 242 | 243 | def parse_boot_keyboard_report(data: bytearray): 244 | # 数据解析 245 | modifiers = data[0] # 修改键字节 246 | keys = data[2:8] # 键码字节 247 | 248 | # 将修改键字节中的位解码为按键修饰符 249 | ctrl = (modifiers & 0x11) != 0 250 | shift = (modifiers & 0x22) != 0 251 | alt = (modifiers & 0x44) != 0 252 | gui = (modifiers & 0x88) != 0 253 | 254 | # 解析键码字节并将其映射为字符 255 | characters = [] 256 | for key in keys: 257 | if key != 0: 258 | # 键码不为0则查询映射表 259 | if key in BOOT_KEYBOARD_MAP: 260 | characters.append(BOOT_KEYBOARD_MAP[key][shift]) 261 | else: 262 | characters.append(None) 263 | return (ctrl, shift, alt, gui, characters) 264 | 265 | 266 | def help_formatter(prog): 267 | return argparse.HelpFormatter(prog, max_help_position=40) 268 | 269 | 270 | def main(): 271 | # 解析命令行参数 272 | parser = argparse.ArgumentParser( 273 | description='Parse keyboard report data and output as text', formatter_class=help_formatter) 274 | parser.add_argument('pcapng_file', help='path to the pcapng file') 275 | args = parser.parse_args() 276 | 277 | # 通过tshark解析pcapng文件，获取键盘数据包 278 | tmpfile = NamedTemporaryFile(delete=False) 279 | tmpfile.close() 280 | 281 | command = "tshark -r %s -T fields -e usbhid.data -e usb.capdata > %s" % ( 282 | args.pcapng_file, tmpfile.name) 283 | os.system(command) 284 | 285 | with open(tmpfile.name, 'r') as f: 286 | lines = f.readlines() 287 | 288 | os.unlink(tmpfile.name) 289 | 290 | # 解析键盘数据包，获取输入字符 291 | text = "" 292 | last_characters_count = {} 293 | repeat_limit = 2 294 | for line in lines: 295 | capdata = line.strip().replace(':', '') 296 | if capdata: 297 | data = bytearray.fromhex(capdata) 298 | characters = parse_boot_keyboard_report(data)[-1] 299 | if not characters: 300 | last_characters_count = {} 301 | else: 302 | for character in characters: 303 | if character: 304 | last_characters_count = {character: count for character, 305 | count in last_characters_count.items() if character in characters} 306 | if character in last_characters_count: 307 | last_characters_count[character] += 1 308 | if last_characters_count[character] <= repeat_limit: 309 | continue 310 | else: 311 | last_characters_count[character] = 1 312 | text += character 313 | else: 314 | pass 315 | 316 | raw_text = repr(text) 317 | print(f'Raw output:\n{raw_text}') 318 | print(f'Text output:\n{text}') 319 | 320 | 321 | if __name__ == "__main__": 322 | main() 323 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. 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"Knowingly relying" means you have 508 | actual knowledge that, but for the patent license, your conveying the 509 | covered work in a country, or your recipient's use of the covered work 510 | in a country, would infringe one or more identifiable patents in that 511 | country that you have reason to believe are valid. 512 | 513 | If, pursuant to or in connection with a single transaction or 514 | arrangement, you convey, or propagate by procuring conveyance of, a 515 | covered work, and grant a patent license to some of the parties 516 | receiving the covered work authorizing them to use, propagate, modify 517 | or convey a specific copy of the covered work, then the patent license 518 | you grant is automatically extended to all recipients of the covered 519 | work and works based on it. 520 | 521 | A patent license is "discriminatory" if it does not include within 522 | the scope of its coverage, prohibits the exercise of, or is 523 | conditioned on the non-exercise of one or more of the rights that are 524 | specifically granted under this License. You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------