├── COPYING ├── README.rst ├── git-remote-gcrypt └── install.sh /COPYING: -------------------------------------------------------------------------------- 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. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. We, the Free Software Foundation, use the 18 | GNU General Public License for most of our software; it applies also to 19 | any other work released this way by its authors. You can apply it to 20 | your programs, too. 21 | 22 | When we speak of free software, we are referring to freedom, not 23 | price. Our General Public Licenses are designed to make sure that you 24 | have the freedom to distribute copies of free software (and charge for 25 | them if you wish), that you receive source code or can get it if you 26 | want it, that you can change the software or use pieces of it in new 27 | free programs, and that you know you can do these things. 28 | 29 | To protect your rights, we need to prevent others from denying you 30 | these rights or asking you to surrender the rights. Therefore, you have 31 | certain responsibilities if you distribute copies of the software, or if 32 | you modify it: responsibilities to respect the freedom of others. 33 | 34 | For example, if you distribute copies of such a program, whether 35 | gratis or for a fee, you must pass on to the recipients the same 36 | freedoms that you received. You must make sure that they, too, receive 37 | or can get the source code. And you must show them these terms so they 38 | know their rights. 39 | 40 | Developers that use the GNU GPL protect your rights with two steps: 41 | (1) assert copyright on the software, and (2) offer you this License 42 | giving you legal permission to copy, distribute and/or modify it. 43 | 44 | For the developers' and authors' protection, the GPL clearly explains 45 | that there is no warranty for this free software. For both users' and 46 | authors' sake, the GPL requires that modified versions be marked as 47 | changed, so that their problems will not be attributed erroneously to 48 | authors of previous versions. 49 | 50 | Some devices are designed to deny users access to install or run 51 | modified versions of the software inside them, although the manufacturer 52 | can do so. This is fundamentally incompatible with the aim of 53 | protecting users' freedom to change the software. The systematic 54 | pattern of such abuse occurs in the area of products for individuals to 55 | use, which is precisely where it is most unacceptable. Therefore, we 56 | have designed this version of the GPL to prohibit the practice for those 57 | products. If such problems arise substantially in other domains, we 58 | stand ready to extend this provision to those domains in future versions 59 | of the GPL, as needed to protect the freedom of users. 60 | 61 | Finally, every program is threatened constantly by software patents. 62 | States should not allow patents to restrict development and use of 63 | software on general-purpose computers, but in those that do, we wish to 64 | avoid the special danger that patents applied to a free program could 65 | make it effectively proprietary. To prevent this, the GPL assures that 66 | patents cannot be used to render the program non-free. 67 | 68 | The precise terms and conditions for copying, distribution and 69 | modification follow. 70 | 71 | TERMS AND CONDITIONS 72 | 73 | 0. Definitions. 74 | 75 | "This License" refers to version 3 of the GNU General Public License. 76 | 77 | "Copyright" also means copyright-like laws that apply to other kinds of 78 | works, such as semiconductor masks. 79 | 80 | "The Program" refers to any copyrightable work licensed under this 81 | License. Each licensee is addressed as "you". "Licensees" and 82 | "recipients" may be individuals or organizations. 83 | 84 | To "modify" a work means to copy from or adapt all or part of the work 85 | in a fashion requiring copyright permission, other than the making of an 86 | exact copy. The resulting work is called a "modified version" of the 87 | earlier work or a work "based on" the earlier work. 88 | 89 | A "covered work" means either the unmodified Program or a work based 90 | on the Program. 91 | 92 | To "propagate" a work means to do anything with it that, without 93 | permission, would make you directly or secondarily liable for 94 | infringement under applicable copyright law, except executing it on a 95 | computer or modifying a private copy. Propagation includes copying, 96 | distribution (with or without modification), making available to the 97 | public, and in some countries other activities as well. 98 | 99 | To "convey" a work means any kind of propagation that enables other 100 | parties to make or receive copies. Mere interaction with a user through 101 | a computer network, with no transfer of a copy, is not conveying. 102 | 103 | An interactive user interface displays "Appropriate Legal Notices" 104 | to the extent that it includes a convenient and prominently visible 105 | feature that (1) displays an appropriate copyright notice, and (2) 106 | tells the user that there is no warranty for the work (except to the 107 | extent that warranties are provided), that licensees may convey the 108 | work under this License, and how to view a copy of this License. If 109 | the interface presents a list of user commands or options, such as a 110 | menu, a prominent item in the list meets this criterion. 111 | 112 | 1. Source Code. 113 | 114 | The "source code" for a work means the preferred form of the work 115 | for making modifications to it. "Object code" means any non-source 116 | form of a work. 117 | 118 | A "Standard Interface" means an interface that either is an official 119 | standard defined by a recognized standards body, or, in the case of 120 | interfaces specified for a particular programming language, one that 121 | is widely used among developers working in that language. 122 | 123 | The "System Libraries" of an executable work include anything, other 124 | than the work as a whole, that (a) is included in the normal form of 125 | packaging a Major Component, but which is not part of that Major 126 | Component, and (b) serves only to enable use of the work with that 127 | Major Component, or to implement a Standard Interface for which an 128 | implementation is available to the public in source code form. A 129 | "Major Component", in this context, means a major essential component 130 | (kernel, window system, and so on) of the specific operating system 131 | (if any) on which the executable work runs, or a compiler used to 132 | produce the work, or an object code interpreter used to run it. 133 | 134 | The "Corresponding Source" for a work in object code form means all 135 | the source code needed to generate, install, and (for an executable 136 | work) run the object code and to modify the work, including scripts to 137 | control those activities. However, it does not include the work's 138 | System Libraries, or general-purpose tools or generally available free 139 | programs which are used unmodified in performing those activities but 140 | which are not part of the work. For example, Corresponding Source 141 | includes interface definition files associated with source files for 142 | the work, and the source code for shared libraries and dynamically 143 | linked subprograms that the work is specifically designed to require, 144 | such as by intimate data communication or control flow between those 145 | subprograms and other parts of the work. 146 | 147 | The Corresponding Source need not include anything that users 148 | can regenerate automatically from other parts of the Corresponding 149 | Source. 150 | 151 | The Corresponding Source for a work in source code form is that 152 | same work. 153 | 154 | 2. Basic Permissions. 155 | 156 | All rights granted under this License are granted for the term of 157 | copyright on the Program, and are irrevocable provided the stated 158 | conditions are met. This License explicitly affirms your unlimited 159 | permission to run the unmodified Program. The output from running a 160 | covered work is covered by this License only if the output, given its 161 | content, constitutes a covered work. This License acknowledges your 162 | rights of fair use or other equivalent, as provided by copyright law. 163 | 164 | You may make, run and propagate covered works that you do not 165 | convey, without conditions so long as your license otherwise remains 166 | in force. You may convey covered works to others for the sole purpose 167 | of having them make modifications exclusively for you, or provide you 168 | with facilities for running those works, provided that you comply with 169 | the terms of this License in conveying all material for which you do 170 | not control copyright. Those thus making or running the covered works 171 | for you must do so exclusively on your behalf, under your direction 172 | and control, on terms that prohibit them from making any copies of 173 | your copyrighted material outside their relationship with you. 174 | 175 | Conveying under any other circumstances is permitted solely under 176 | the conditions stated below. Sublicensing is not allowed; section 10 177 | makes it unnecessary. 178 | 179 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 180 | 181 | No covered work shall be deemed part of an effective technological 182 | measure under any applicable law fulfilling obligations under article 183 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 184 | similar laws prohibiting or restricting circumvention of such 185 | measures. 186 | 187 | When you convey a covered work, you waive any legal power to forbid 188 | circumvention of technological measures to the extent such circumvention 189 | is effected by exercising rights under this License with respect to 190 | the covered work, and you disclaim any intention to limit operation or 191 | modification of the work as a means of enforcing, against the work's 192 | users, your or third parties' legal rights to forbid circumvention of 193 | technological measures. 194 | 195 | 4. Conveying Verbatim Copies. 196 | 197 | You may convey verbatim copies of the Program's source code as you 198 | receive it, in any medium, provided that you conspicuously and 199 | appropriately publish on each copy an appropriate copyright notice; 200 | keep intact all notices stating that this License and any 201 | non-permissive terms added in accord with section 7 apply to the code; 202 | keep intact all notices of the absence of any warranty; and give all 203 | recipients a copy of this License along with the Program. 204 | 205 | You may charge any price or no price for each copy that you convey, 206 | and you may offer support or warranty protection for a fee. 207 | 208 | 5. Conveying Modified Source Versions. 209 | 210 | You may convey a work based on the Program, or the modifications to 211 | produce it from the Program, in the form of source code under the 212 | terms of section 4, provided that you also meet all of these conditions: 213 | 214 | a) The work must carry prominent notices stating that you modified 215 | it, and giving a relevant date. 216 | 217 | b) The work must carry prominent notices stating that it is 218 | released under this License and any conditions added under section 219 | 7. This requirement modifies the requirement in section 4 to 220 | "keep intact all notices". 221 | 222 | c) You must license the entire work, as a whole, under this 223 | License to anyone who comes into possession of a copy. This 224 | License will therefore apply, along with any applicable section 7 225 | additional terms, to the whole of the work, and all its parts, 226 | regardless of how they are packaged. This License gives no 227 | permission to license the work in any other way, but it does not 228 | invalidate such permission if you have separately received it. 229 | 230 | d) If the work has interactive user interfaces, each must display 231 | Appropriate Legal Notices; however, if the Program has interactive 232 | interfaces that do not display Appropriate Legal Notices, your 233 | work need not make them do so. 234 | 235 | A compilation of a covered work with other separate and independent 236 | works, which are not by their nature extensions of the covered work, 237 | and which are not combined with it such as to form a larger program, 238 | in or on a volume of a storage or distribution medium, is called an 239 | "aggregate" if the compilation and its resulting copyright are not 240 | used to limit the access or legal rights of the compilation's users 241 | beyond what the individual works permit. Inclusion of a covered work 242 | in an aggregate does not cause this License to apply to the other 243 | parts of the aggregate. 244 | 245 | 6. Conveying Non-Source Forms. 246 | 247 | You may convey a covered work in object code form under the terms 248 | of sections 4 and 5, provided that you also convey the 249 | machine-readable Corresponding Source under the terms of this License, 250 | in one of these ways: 251 | 252 | a) Convey the object code in, or embodied in, a physical product 253 | (including a physical distribution medium), accompanied by the 254 | Corresponding Source fixed on a durable physical medium 255 | customarily used for software interchange. 256 | 257 | b) Convey the object code in, or embodied in, a physical product 258 | (including a physical distribution medium), accompanied by a 259 | written offer, valid for at least three years and valid for as 260 | long as you offer spare parts or customer support for that product 261 | model, to give anyone who possesses the object code either (1) a 262 | copy of the Corresponding Source for all the software in the 263 | product that is covered by this License, on a durable physical 264 | medium customarily used for software interchange, for a price no 265 | more than your reasonable cost of physically performing this 266 | conveying of source, or (2) access to copy the 267 | Corresponding Source from a network server at no charge. 268 | 269 | c) Convey individual copies of the object code with a copy of the 270 | written offer to provide the Corresponding Source. This 271 | alternative is allowed only occasionally and noncommercially, and 272 | only if you received the object code with such an offer, in accord 273 | with subsection 6b. 274 | 275 | d) Convey the object code by offering access from a designated 276 | place (gratis or for a charge), and offer equivalent access to the 277 | Corresponding Source in the same way through the same place at no 278 | further charge. You need not require recipients to copy the 279 | Corresponding Source along with the object code. If the place to 280 | copy the object code is a network server, the Corresponding Source 281 | may be on a different server (operated by you or a third party) 282 | that supports equivalent copying facilities, provided you maintain 283 | clear directions next to the object code saying where to find the 284 | Corresponding Source. Regardless of what server hosts the 285 | Corresponding Source, you remain obligated to ensure that it is 286 | available for as long as needed to satisfy these requirements. 287 | 288 | e) Convey the object code using peer-to-peer transmission, provided 289 | you inform other peers where the object code and Corresponding 290 | Source of the work are being offered to the general public at no 291 | charge under subsection 6d. 292 | 293 | A separable portion of the object code, whose source code is excluded 294 | from the Corresponding Source as a System Library, need not be 295 | included in conveying the object code work. 296 | 297 | A "User Product" is either (1) a "consumer product", which means any 298 | tangible personal property which is normally used for personal, family, 299 | or household purposes, or (2) anything designed or sold for incorporation 300 | into a dwelling. In determining whether a product is a consumer product, 301 | doubtful cases shall be resolved in favor of coverage. For a particular 302 | product received by a particular user, "normally used" refers to a 303 | typical or common use of that class of product, regardless of the status 304 | of the particular user or of the way in which the particular user 305 | actually uses, or expects or is expected to use, the product. A product 306 | is a consumer product regardless of whether the product has substantial 307 | commercial, industrial or non-consumer uses, unless such uses represent 308 | the only significant mode of use of the product. 309 | 310 | "Installation Information" for a User Product means any methods, 311 | procedures, authorization keys, or other information required to install 312 | and execute modified versions of a covered work in that User Product from 313 | a modified version of its Corresponding Source. The information must 314 | suffice to ensure that the continued functioning of the modified object 315 | code is in no case prevented or interfered with solely because 316 | modification has been made. 317 | 318 | If you convey an object code work under this section in, or with, or 319 | specifically for use in, a User Product, and the conveying occurs as 320 | part of a transaction in which the right of possession and use of the 321 | User Product is transferred to the recipient in perpetuity or for a 322 | fixed term (regardless of how the transaction is characterized), the 323 | Corresponding Source conveyed under this section must be accompanied 324 | by the Installation Information. But this requirement does not apply 325 | if neither you nor any third party retains the ability to install 326 | modified object code on the User Product (for example, the work has 327 | been installed in ROM). 328 | 329 | The requirement to provide Installation Information does not include a 330 | requirement to continue to provide support service, warranty, or updates 331 | for a work that has been modified or installed by the recipient, or for 332 | the User Product in which it has been modified or installed. Access to a 333 | network may be denied when the modification itself materially and 334 | adversely affects the operation of the network or violates the rules and 335 | protocols for communication across the network. 336 | 337 | Corresponding Source conveyed, and Installation Information provided, 338 | in accord with this section must be in a format that is publicly 339 | documented (and with an implementation available to the public in 340 | source code form), and must require no special password or key for 341 | unpacking, reading or copying. 342 | 343 | 7. Additional Terms. 344 | 345 | "Additional permissions" are terms that supplement the terms of this 346 | License by making exceptions from one or more of its conditions. 347 | Additional permissions that are applicable to the entire Program shall 348 | be treated as though they were included in this License, to the extent 349 | that they are valid under applicable law. If additional permissions 350 | apply only to part of the Program, that part may be used separately 351 | under those permissions, but the entire Program remains governed by 352 | this License without regard to the additional permissions. 353 | 354 | When you convey a copy of a covered work, you may at your option 355 | remove any additional permissions from that copy, or from any part of 356 | it. (Additional permissions may be written to require their own 357 | removal in certain cases when you modify the work.) You may place 358 | additional permissions on material, added by you to a covered work, 359 | for which you have or can give appropriate copyright permission. 360 | 361 | Notwithstanding any other provision of this License, for material you 362 | add to a covered work, you may (if authorized by the copyright holders of 363 | that material) supplement the terms of this License with terms: 364 | 365 | a) Disclaiming warranty or limiting liability differently from the 366 | terms of sections 15 and 16 of this License; or 367 | 368 | b) Requiring preservation of specified reasonable legal notices or 369 | author attributions in that material or in the Appropriate Legal 370 | Notices displayed by works containing it; or 371 | 372 | c) Prohibiting misrepresentation of the origin of that material, or 373 | requiring that modified versions of such material be marked in 374 | reasonable ways as different from the original version; or 375 | 376 | d) Limiting the use for publicity purposes of names of licensors or 377 | authors of the material; or 378 | 379 | e) Declining to grant rights under trademark law for use of some 380 | trade names, trademarks, or service marks; or 381 | 382 | f) Requiring indemnification of licensors and authors of that 383 | material by anyone who conveys the material (or modified versions of 384 | it) with contractual assumptions of liability to the recipient, for 385 | any liability that these contractual assumptions directly impose on 386 | those licensors and authors. 387 | 388 | All other non-permissive additional terms are considered "further 389 | restrictions" within the meaning of section 10. If the Program as you 390 | received it, or any part of it, contains a notice stating that it is 391 | governed by this License along with a term that is a further 392 | restriction, you may remove that term. If a license document contains 393 | a further restriction but permits relicensing or conveying under this 394 | License, you may add to a covered work material governed by the terms 395 | of that license document, provided that the further restriction does 396 | not survive such relicensing or conveying. 397 | 398 | If you add terms to a covered work in accord with this section, you 399 | must place, in the relevant source files, a statement of the 400 | additional terms that apply to those files, or a notice indicating 401 | where to find the applicable terms. 402 | 403 | Additional terms, permissive or non-permissive, may be stated in the 404 | form of a separately written license, or stated as exceptions; 405 | the above requirements apply either way. 406 | 407 | 8. Termination. 408 | 409 | You may not propagate or modify a covered work except as expressly 410 | provided under this License. Any attempt otherwise to propagate or 411 | modify it is void, and will automatically terminate your rights under 412 | this License (including any patent licenses granted under the third 413 | paragraph of section 11). 414 | 415 | However, if you cease all violation of this License, then your 416 | license from a particular copyright holder is reinstated (a) 417 | provisionally, unless and until the copyright holder explicitly and 418 | finally terminates your license, and (b) permanently, if the copyright 419 | holder fails to notify you of the violation by some reasonable means 420 | prior to 60 days after the cessation. 421 | 422 | Moreover, your license from a particular copyright holder is 423 | reinstated permanently if the copyright holder notifies you of the 424 | violation by some reasonable means, this is the first time you have 425 | received notice of violation of this License (for any work) from that 426 | copyright holder, and you cure the violation prior to 30 days after 427 | your receipt of the notice. 428 | 429 | Termination of your rights under this section does not terminate the 430 | licenses of parties who have received copies or rights from you under 431 | this License. If your rights have been terminated and not permanently 432 | reinstated, you do not qualify to receive new licenses for the same 433 | material under section 10. 434 | 435 | 9. Acceptance Not Required for Having Copies. 436 | 437 | You are not required to accept this License in order to receive or 438 | run a copy of the Program. Ancillary propagation of a covered work 439 | occurring solely as a consequence of using peer-to-peer transmission 440 | to receive a copy likewise does not require acceptance. However, 441 | nothing other than this License grants you permission to propagate or 442 | modify any covered work. These actions infringe copyright if you do 443 | not accept this License. Therefore, by modifying or propagating a 444 | covered work, you indicate your acceptance of this License to do so. 445 | 446 | 10. Automatic Licensing of Downstream Recipients. 447 | 448 | Each time you convey a covered work, the recipient automatically 449 | receives a license from the original licensors, to run, modify and 450 | propagate that work, subject to this License. You are not responsible 451 | for enforcing compliance by third parties with this License. 452 | 453 | An "entity transaction" is a transaction transferring control of an 454 | organization, or substantially all assets of one, or subdividing an 455 | organization, or merging organizations. If propagation of a covered 456 | work results from an entity transaction, each party to that 457 | transaction who receives a copy of the work also receives whatever 458 | licenses to the work the party's predecessor in interest had or could 459 | give under the previous paragraph, plus a right to possession of the 460 | Corresponding Source of the work from the predecessor in interest, if 461 | the predecessor has it or can get it with reasonable efforts. 462 | 463 | You may not impose any further restrictions on the exercise of the 464 | rights granted or affirmed under this License. For example, you may 465 | not impose a license fee, royalty, or other charge for exercise of 466 | rights granted under this License, and you may not initiate litigation 467 | (including a cross-claim or counterclaim in a lawsuit) alleging that 468 | any patent claim is infringed by making, using, selling, offering for 469 | sale, or importing the Program or any portion of it. 470 | 471 | 11. 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. For 483 | purposes of this definition, "control" includes the right to grant 484 | patent sublicenses in a manner consistent with the requirements of 485 | this License. 486 | 487 | Each contributor grants you a non-exclusive, worldwide, royalty-free 488 | patent license under the contributor's essential patent claims, to 489 | make, use, sell, offer for sale, import and otherwise run, modify and 490 | propagate the contents of its contributor version. 491 | 492 | In the following three paragraphs, a "patent license" is any express 493 | agreement or commitment, however denominated, not to enforce a patent 494 | (such as an express permission to practice a patent or covenant not to 495 | sue for patent infringement). To "grant" such a patent license to a 496 | party means to make such an agreement or commitment not to enforce a 497 | patent against the party. 498 | 499 | If you convey a covered work, knowingly relying on a patent license, 500 | and the Corresponding Source of the work is not available for anyone 501 | to copy, free of charge and under the terms of this License, through a 502 | publicly available network server or other readily accessible means, 503 | then you must either (1) cause the Corresponding Source to be so 504 | available, or (2) arrange to deprive yourself of the benefit of the 505 | patent license for this particular work, or (3) arrange, in a manner 506 | consistent with the requirements of this License, to extend the patent 507 | license to downstream recipients. "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 | -------------------------------------------------------------------------------- /README.rst: -------------------------------------------------------------------------------- 1 | ================= 2 | git-remote-gcrypt 3 | ================= 4 | 5 | -------------------------------------- 6 | GNU Privacy Guard-encrypted git remote 7 | -------------------------------------- 8 | 9 | :Manual section: 1 10 | 11 | Description 12 | =========== 13 | 14 | Remote helper programs are invoked by git to handle network transport. 15 | This helper handles `gcrypt::` URLs that will access a remote repository 16 | encrypted with GPG, using our custom format. 17 | 18 | Supported locations are `local`, `rsync://` and `sftp://`, where the 19 | repository is stored as a set of files, or instead any `` where 20 | gcrypt will store the same representation in a git repository, bridged 21 | over arbitrary git transport. 22 | 23 | The aim is to provide confidential, authenticated git storage and 24 | collaboration using typical untrusted file hosts or services. 25 | PLEASE help us evaluate how well we meet this design goal! 26 | 27 | .. NOTE:: This is a development version -- Repository format MAY CHANGE. 28 | 29 | Quickstart 30 | .......... 31 | 32 | * Install ``git-remote-gcrypt`` by running the supplied ``install.sh`` script. 33 | 34 | * Create an encrypted remote by pushing to it:: 35 | 36 | git remote add cryptremote gcrypt::rsync://example.com:repo 37 | git push cryptremote master 38 | > gcrypt: Setting up new repository 39 | > gcrypt: Remote ID is :id:7VigUnLVYVtZx8oir34R 40 | > [ more lines .. ] 41 | > To gcrypt::[...] 42 | > * [new branch] master -> master 43 | 44 | Configuration 45 | ============= 46 | 47 | The following ``git-config(1)`` variables are supported: 48 | 49 | ``remote..gcrypt-participants`` 50 | .. 51 | ``gcrypt.participants`` 52 | Space-separated list of GPG key identifiers. The remote is encrypted 53 | to these participants and only signatures from these are accepted. 54 | ``gpg -k`` lists all public keys you know. 55 | 56 | If this option is not set, we encrypt to your default key and accept 57 | any valid signature. This behavior can also be requested explicitly 58 | by setting participants to ``simple``. 59 | 60 | The ``gcrypt-participants`` setting on the remote takes precedence 61 | over the repository variable ``gcrypt.participants``. 62 | 63 | ``user.signingkey`` 64 | (From regular git configuration) The key to use for signing. You 65 | should set ``user.signingkey`` if your default signing key is not 66 | part of the participant list. 67 | 68 | Environment Variables 69 | ===================== 70 | 71 | *GCRYPT_FULL_REPACK* 72 | This environment variable forces full repack when pushing. 73 | 74 | Examples 75 | ======== 76 | 77 | How to set up a remote for two participants:: 78 | 79 | git remote add cryptremote gcrypt::rsync://example.com:repo 80 | git config remote.cryptremote.gcrypt-participants "KEY1 KEY2" 81 | git push cryptremote master 82 | 83 | How to use a git backend:: 84 | 85 | # notice that the target git repo must already exist and its 86 | # `next` branch will be overwritten! 87 | git remote add gitcrypt gcrypt::git@example.com:repo#next 88 | git push gitcrypt master 89 | 90 | The URL fragment (`#next` here) indicates which backend branch is used. 91 | 92 | Notes 93 | ===== 94 | 95 | Collaboration 96 | The encryption of the manifest is updated for each push to match the 97 | participant configuration. Each pushing user must have the public 98 | keys of all collaborators and correct participant config. 99 | 100 | Dependencies 101 | ``rsync`` and ``curl`` for remotes ``rsync:`` and ``sftp:`` 102 | respectively. The main executable requires a POSIX-compliant shell 103 | that supports ``local``. 104 | 105 | GNU Privacy Guard 106 | Both GPG 1.4 and 2 are supported. You need a personal GPG key. GPG 107 | configuration applies to algorithm choices for public-key 108 | encryption, symmetric encryption, and signing. See ``man gpg`` for 109 | more information. 110 | 111 | Remote ID 112 | The Remote ID is not secret; it only ensures that two repositories 113 | signed by the same user can be distinguished. You will see 114 | a warning if the Remote ID changes, which should only happen if the 115 | remote was re-created. 116 | 117 | Repository Format 118 | ................. 119 | 120 | | `EncSign(X):` Sign and Encrypt to GPG key holder 121 | | `Encrypt(K,X):` Encrypt using symmetric-key algorithm 122 | | `Hash(X):` SHA-2/256 123 | | 124 | | `B:` branch list 125 | | `L:` list of the hash (`Hi`) and key (`Ki`) for each packfile 126 | | `R:` Remote ID 127 | | 128 | | To write the repository: 129 | | 130 | | Store each packfile `P` as `Encrypt(Ki, P)` → `P'` in filename `Hi` 131 | | where `Ki` is a new random string and `Hash(P')` → `Hi` 132 | | Store `EncSign(B || L || R)` in the manifest 133 | | 134 | | To read the repository: 135 | | 136 | | Get manifest, decrypt and verify using GPG keyring → `(B, L, R)` 137 | | Warn if `R` does not match previously seen Remote ID 138 | | for each `Hi, Ki` in `L`: 139 | | Get file `Hi` from the server → `P'` 140 | | Verify `Hash(P')` matches `Hi` 141 | | Decrypt `P'` using `Ki` → `P` then open `P` with git 142 | 143 | Manifest file 144 | ............. 145 | 146 | Example manifest file (with ellipsis for brevity):: 147 | 148 | $ gpg -d 91bd0c092128cf2e60e1a608c31e92caf1f9c1595f83f2890ef17c0e4881aa0a 149 | 542051c7cd152644e4995bda63cc3ddffd635958 refs/heads/next 150 | 3c9e76484c7596eff70b21cbe58408b2774bedad refs/heads/master 151 | pack :SHA256:f2ad50316...cd4ba67092dc4 z8YoAnFpMlW...3PkI2mND49P1qm 152 | pack :SHA256:a6e17bb4c...426492f379584 82+k2cbiUn7...dgXfyX6wXGpvVa 153 | keep :SHA256:f2ad50316...cd4ba67092dc4 1 154 | repo :id:OYiSleGirtLubEVqJpFF 155 | 156 | Each item extends until newline, and matches one of the following: 157 | 158 | `` `` 159 | Git object id and its ref 160 | 161 | ``pack :: `` 162 | Packfile hash (`Hi`) and corresponding symmetric key (`Ki`). 163 | 164 | ``keep :: `` 165 | Packfile hash and its repack generation 166 | 167 | ``repo `` 168 | The remote id 169 | 170 | ``extn ...`` 171 | Extension field, preserved but unused. 172 | 173 | See Also 174 | ======== 175 | 176 | git-remote-helpers(1), gpg(1) 177 | 178 | License 179 | ======= 180 | 181 | This document and git-remote-gcrypt are licensed under identical terms, 182 | GPL-3 (or 2+), see the git-remote-gcrypt file. 183 | 184 | .. this document generates a man page with rst2man 185 | .. vim: ft=rst tw=72 sts=4 186 | -------------------------------------------------------------------------------- /git-remote-gcrypt: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | # 3 | # git-remote-gcrypt 4 | # 5 | # This program is free software: you can redistribute it and/or modify 6 | # it under the terms of the GNU General Public License as published by 7 | # the Free Software Foundation, either version 3 of the License, or 8 | # (at your option) version 2 or any later version. 9 | # 10 | # This program is distributed in the hope that it will be useful, 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | # GNU General Public License for more details. 14 | # 15 | # You should have received a copy of the GNU General Public License 16 | # along with this program. If not, see . 17 | # 18 | # See README.rst for usage instructions 19 | 20 | set -e # errexit 21 | set -u # nounset 22 | set -f # noglob 23 | set -C # noclobber 24 | 25 | export GITCEPTION="${GITCEPTION:-}+" # Reuse $Gref except when stacked 26 | Gref="refs/gcrypt/gitception$GITCEPTION" 27 | Gref_rbranch="refs/heads/master" 28 | Packkey_bytes=63 # nbr random bytes for packfile keys, any >= 256 bit is ok 29 | Hashtype=SHA256 # SHA512 SHA384 SHA256 SHA224 supported. 30 | Manifestfile=91bd0c092128cf2e60e1a608c31e92caf1f9c1595f83f2890ef17c0e4881aa0a 31 | Hex40="[a-f0-9]" 32 | Hex40=$Hex40$Hex40$Hex40$Hex40$Hex40$Hex40$Hex40$Hex40 33 | Hex40=$Hex40$Hex40$Hex40$Hex40$Hex40 # Match SHA-1 hexdigest 34 | 35 | Did_find_repo= # yes for connected, no for no repo 36 | Localdir="${GIT_DIR:=.git}/remote-gcrypt" 37 | Tempdir= 38 | 39 | Repoid= 40 | Refslist= 41 | Packlist= 42 | Keeplist= 43 | Extnlist= 44 | Repack_limit=25 45 | 46 | Recipients= 47 | 48 | # compat/utility functions 49 | # xfeed: The most basic output function puts $1 into the stdin of $2..$# 50 | xfeed() 51 | { 52 | local input_= 53 | input_=$1; shift 54 | "$@" <&2; } 62 | echo_die() { echo_info "$@" ; exit 1; } 63 | 64 | isnull() { case "$1" in "") return 0;; *) return 1;; esac; } 65 | isnonnull() { ! isnull "$1"; } 66 | iseq() { case "$1" in "$2") return 0;; *) return 1;; esac; } 67 | isnoteq() { ! iseq "$1" "$2"; } 68 | negate() { ! "$@"; } 69 | 70 | # Execute $@ or die 71 | pipefail() 72 | { 73 | "$@" || { echo_info "'$1' failed!"; kill $$; exit 1; } 74 | } 75 | 76 | isurl() { isnull "${2%%$1://*}"; } 77 | islocalrepo() { isnull "${1##/*}" && [ ! -e "$1/HEAD" ]; } 78 | 79 | xgrep() { command grep "$@" || : ; } 80 | 81 | # setvar is used for named return variables 82 | # $1 *must* be a valid variable name, $2 is any value 83 | # 84 | # Conventions 85 | # return variable names are passed with a @ prefix 86 | # return variable functions use f_ prefix local vars 87 | # return var consumers use r_ prefix vars (or Titlecase globals) 88 | setvar() 89 | { 90 | isnull "${1##@*}" || echo_die "Missing @ for return variable: $1" 91 | eval ${1#@}=\$2 92 | } 93 | 94 | Newline=" 95 | " 96 | 97 | # $1 is return var, $2 is value appended with newline separator 98 | append_to() 99 | { 100 | local f_append_tmp_= 101 | eval f_append_tmp_=\$${1#@} 102 | isnull "$f_append_tmp_" || f_append_tmp_=$f_append_tmp_$Newline 103 | setvar "$1" "$f_append_tmp_$2" 104 | } 105 | 106 | # Pick words from each line 107 | # $1 return variable name 108 | # $2 input value 109 | pick_fields_1_2() 110 | { 111 | local f_ret= f_one= f_two= 112 | while read f_one f_two _ # from << here-document 113 | do 114 | f_ret="$f_ret$f_one $f_two$Newline" 115 | done </dev/null && 157 | obj_id="$(git ls-tree "$Gref" | xgrep -E '\b'"$2"'$' | awk '{print $3}')" && 158 | isnonnull "$obj_id" && git cat-file blob "$obj_id" && ret_=: || 159 | { ret_=false && : ; } 160 | [ -e "$fet_head.$$~" ] && command mv -f "$fet_head.$$~" "$fet_head" || : 161 | $ret_ 162 | } 163 | 164 | anon_commit() 165 | { 166 | GIT_AUTHOR_NAME="root" GIT_AUTHOR_EMAIL="root@localhost" \ 167 | GIT_AUTHOR_DATE="1356994801 -0400" GIT_COMMITTER_NAME="root" \ 168 | GIT_COMMITTER_EMAIL="root@localhost" \ 169 | GIT_COMMITTER_DATE="1356994801 -0400" \ 170 | git commit-tree "$@" </dev/null >&2 || : 212 | git rev-parse -q --verify "$Gref" >/dev/null && return 0 || 213 | commit_id=$(anon_commit "$empty_tree") && 214 | git update-ref "$Gref" "$commit_id" 215 | } 216 | ## end gitception 217 | 218 | # Fetch repo $1, file $2, tmpfile in $3 219 | GET() 220 | { 221 | if isurl sftp "$1" 222 | then 223 | (exec 0>&-; curl -s -S -k "$1/$2") > "$3" 224 | elif isurl rsync "$1" 225 | then 226 | (exec 0>&-; rsync -I -W "${1#rsync://}"/"$2" "$3" >&2) 227 | elif islocalrepo "$1" 228 | then 229 | cat "$1/$2" > "$3" 230 | else 231 | gitception_get "${1#gitception://}" "$2" > "$3" 232 | fi 233 | } 234 | 235 | # Put repo $1, file $2 or fail, tmpfile in $3 236 | PUT() 237 | { 238 | if isurl sftp "$1" 239 | then 240 | curl -s -S -k --ftp-create-dirs -T "$3" "$1/$2" 241 | elif isurl rsync "$1" 242 | then 243 | rsync -I -W "$3" "${1#rsync://}"/"$2" >&2 244 | elif islocalrepo "$1" 245 | then 246 | cat >| "$1/$2" < "$3" 247 | else 248 | gitception_put "${1#gitception://}" "$2" < "$3" 249 | fi 250 | } 251 | 252 | # Put all PUT changes for repo $1 at once 253 | PUT_FINAL() 254 | { 255 | if isurl sftp "$1" || islocalrepo "$1" || isurl rsync "$1" 256 | then 257 | : 258 | else 259 | git push --quiet -f "${1#gitception://}" "$Gref:$Gref_rbranch" 260 | fi 261 | } 262 | 263 | # Put directory for repo $1 264 | PUTREPO() 265 | { 266 | if isurl sftp "$1" 267 | then 268 | : 269 | elif isurl rsync "$1" 270 | then 271 | rsync -q -r --exclude='*' "$Localdir/" "${1#rsync://}" >&2 272 | elif islocalrepo "$1" 273 | then 274 | mkdir -p "$1" 275 | else 276 | gitception_new_repo "${1#gitception://}" 277 | fi 278 | } 279 | 280 | # For repo $1, delete all newline-separated files in $2 281 | REMOVE() 282 | { 283 | local fn_= 284 | if isurl sftp "$1" 285 | then 286 | # FIXME 287 | echo_info "sftp: Ignore remove request $1/$2" 288 | elif isurl rsync "$1" 289 | then 290 | xfeed "$2" rsync -I -W -v -r --delete --include-from=- \ 291 | --exclude='*' "$Localdir"/ "${1#rsync://}/" >&2 292 | elif islocalrepo "$1" 293 | then 294 | for fn_ in $2; do 295 | rm -f "$1"/"$fn_" 296 | done 297 | else 298 | for fn_ in $2; do 299 | gitception_remove "${1#gitception://}" "$fn_" 300 | done 301 | fi 302 | } 303 | 304 | CLEAN_FINAL() 305 | { 306 | if isurl sftp "$1" || islocalrepo "$1" || isurl rsync "$1" 307 | then 308 | : 309 | else 310 | git update-ref -d "$Gref" || : 311 | fi 312 | } 313 | 314 | ENCRYPT() 315 | { 316 | gpg --batch --force-mdc --compress-algo none --passphrase-fd 3 -c 3<&1 && 344 | status_=$(gpg --status-fd 3 -q -d 3>&1 1>&4) && 345 | xfeed "$status_" grep "^\[GNUPG:\] ENC_TO " >/dev/null && 346 | (xfeed "$status_" grep -e "$1" >/dev/null || { 347 | echo_info "Failed to verify manifest signature!" && 348 | echo_info "Only accepting signatories: ${2:-(none)}" && 349 | return 1 350 | }) 351 | } 352 | 353 | # Generate $1 random bytes 354 | genkey() 355 | { 356 | gpg --armor --gen-rand 1 "$1" 357 | } 358 | 359 | gpg_hash() 360 | { 361 | local hash_= 362 | hash_=$(gpg --with-colons --print-md "$1" | tr A-F a-f) 363 | hash_=${hash_#:*:} 364 | xecho "${hash_%:}" 365 | } 366 | 367 | # Pass the branch/ref by pipe to git 368 | safe_git_rev_parse() 369 | { 370 | git cat-file --batch-check 2>/dev/null | 371 | xgrep -v "missing" | cut -f 1 -d ' ' 372 | } 373 | 374 | make_new_repo() 375 | { 376 | echo_info "Setting up new repository" 377 | PUTREPO "$URL" 378 | 379 | # Needed assumption: the same user should have no duplicate Repoid 380 | Repoid=":id:$(genkey 15)" 381 | iseq "${NAME#gcrypt::}" "$URL" || 382 | git config "remote.$NAME.gcrypt-id" "$Repoid" 383 | echo_info "Remote ID is $Repoid" 384 | Extnlist="extn comment" 385 | } 386 | 387 | 388 | # $1 return var for goodsig match, $2 return var for signers text 389 | read_config() 390 | { 391 | local recp_= r_keyinfo= cap_= conf_part= good_sig= signers_= 392 | Conf_signkey=$(git config --path user.signingkey || :) 393 | conf_part=$(git config --get "remote.$NAME.gcrypt-participants" '.+' || 394 | git config --get gcrypt.participants '.+' || :) 395 | 396 | # Figure out which keys we should encrypt to or accept signatures from 397 | if isnull "$conf_part" || iseq "$conf_part" simple 398 | then 399 | signers_="(default keyring)" 400 | Recipients="--throw-keyids --default-recipient-self" 401 | good_sig="^\[GNUPG:\] GOODSIG " 402 | setvar "$1" "$good_sig" 403 | setvar "$2" "$signers_" 404 | return 0 405 | fi 406 | 407 | for recp_ in $conf_part 408 | do 409 | filter_to @r_keyinfo "pub*" \ 410 | "$(gpg --with-colons --fast-list -k "$recp_")" 411 | isnull "$r_keyinfo" || isnonnull "${r_keyinfo##*"$Newline"*}" || 412 | echo_info "WARNING: '$recp_' matches multiple keys, using one" 413 | r_keyinfo=${r_keyinfo%%"$Newline"*} 414 | keyid_=$(xfeed "$r_keyinfo" cut -f 5 -d :) 415 | 416 | isnonnull "$keyid_" && 417 | signers_="$signers_ $keyid_" && 418 | append_to @good_sig "^\[GNUPG:\] GOODSIG $keyid_" || { 419 | echo_info "WARNING: Skipping missing key $recp_" 420 | continue 421 | } 422 | # Check 'E'ncrypt capability 423 | cap_=$(xfeed "$r_keyinfo" cut -f 12 -d :) 424 | iseq "${cap_#*E}" "$cap_" || Recipients="$Recipients -R $keyid_" 425 | done 426 | 427 | if isnull "$Recipients" 428 | then 429 | echo_info "You have not configured any keys you can encrypt to" \ 430 | "for this repository" 431 | echo_info "Use ::" 432 | echo_info " git config gcrypt.participants YOURKEYID" 433 | exit 1 434 | fi 435 | setvar "$1" "$good_sig" 436 | setvar "$2" "$signers_" 437 | } 438 | 439 | ensure_connected() 440 | { 441 | local manifest_= r_repoid= r_name= url_frag= r_sigmatch= r_signers= \ 442 | tmp_manifest= 443 | 444 | if isnonnull "$Did_find_repo" 445 | then 446 | return 447 | fi 448 | Did_find_repo=no 449 | read_config @r_sigmatch @r_signers 450 | 451 | iseq "${NAME#gcrypt::}" "$URL" || r_name=$NAME 452 | 453 | if isurl gitception "$URL" && isnonnull "$r_name"; then 454 | git config "remote.$r_name.url" "gcrypt::${URL#gitception://}" 455 | echo_info "Updated URL for $r_name, gitception:// -> ()" 456 | fi 457 | 458 | # Find the URL fragment 459 | url_frag=${URL##*"#"} 460 | isnoteq "$url_frag" "$URL" || url_frag= 461 | URL=${URL%"#$url_frag"} 462 | 463 | # manifestfile -- sha224 hash if we can, else the default location 464 | if isurl sftp "$URL" || islocalrepo "$URL" || isurl rsync "$URL" 465 | then 466 | # not for gitception 467 | isnull "$url_frag" || 468 | Manifestfile=$(xecho_n "$url_frag" | gpg_hash SHA224) 469 | else 470 | isnull "$url_frag" || Gref_rbranch="refs/heads/$url_frag" 471 | fi 472 | 473 | Repoid= 474 | isnull "$r_name" || 475 | Repoid=$(git config "remote.$r_name.gcrypt-id" || :) 476 | 477 | 478 | tmp_manifest="$Tempdir/maniF" 479 | GET "$URL" "$Manifestfile" "$tmp_manifest" 2>/dev/null || { 480 | echo_info "Repository not found: $URL" 481 | return 0 482 | } 483 | 484 | Did_find_repo=yes 485 | echo_info "Decrypting manifest" 486 | manifest_=$(PRIVDECRYPT "$r_sigmatch" "$r_signers" < "$tmp_manifest") && 487 | isnonnull "$manifest_" || 488 | echo_die "Failed to decrypt manifest!" 489 | rm -f "$tmp_manifest" 490 | 491 | filter_to @Refslist "$Hex40 *" "$manifest_" 492 | filter_to @Packlist "pack :*:* *" "$manifest_" 493 | filter_to @Keeplist "keep :*:*" "$manifest_" 494 | filter_to @Extnlist "extn *" "$manifest_" 495 | filter_to @r_repoid "repo *" "$manifest_" 496 | 497 | r_repoid=${r_repoid#repo } 498 | r_repoid=${r_repoid% *} 499 | if isnull "$Repoid" 500 | then 501 | echo_info "Remote ID is $r_repoid" 502 | Repoid=$r_repoid 503 | elif isnoteq "$r_repoid" "$Repoid" 504 | then 505 | echo_info "WARNING:" 506 | echo_info "WARNING: Remote ID has changed!" 507 | echo_info "WARNING: from $Repoid" 508 | echo_info "WARNING: to $r_repoid" 509 | echo_info "WARNING:" 510 | Repoid=$r_repoid 511 | else 512 | return 0 513 | fi 514 | 515 | isnull "$r_name" || git config "remote.$r_name.gcrypt-id" "$r_repoid" 516 | } 517 | 518 | # $1 is the hash type (SHA256 etc) 519 | # $2 the pack id 520 | # $3 the key 521 | get_verify_decrypt_pack() 522 | { 523 | local rcv_id= tmp_encrypted= 524 | tmp_encrypted="$Tempdir/packF" 525 | GET "$URL" "$2" "$tmp_encrypted" && 526 | rcv_id=$(gpg_hash "$1" < "$tmp_encrypted") && 527 | iseq "$rcv_id" "$2" || echo_die "Packfile $2 does not match digest!" 528 | DECRYPT "$3" < "$tmp_encrypted" 529 | rm -f "$tmp_encrypted" 530 | } 531 | 532 | # download all packlines (pack :SHA256:a32abc1231) from stdin (or die) 533 | # $1 destdir (when repack, else "") 534 | get_pack_files() 535 | { 536 | local pack_id= r_pack_key_line= htype_= pack_= key_= 537 | while IFS=': ' read -r _ htype_ pack_ # </dev/null 558 | xecho "pack $pack_id" >> "$Localdir/have_packs$GITCEPTION" 559 | else 560 | git index-pack -v --stdin "$1/${pack_}.pack" >/dev/null 561 | fi 562 | done 563 | } 564 | 565 | # Download and unpack remote packfiles 566 | # $1 return var for list of packfiles to delete 567 | repack_if_needed() 568 | { 569 | local n_= m_= kline_= r_line= r_keep_packlist= r_del_list= 570 | 571 | isnonnull "$Packlist" || return 0 572 | 573 | if isnonnull "${GCRYPT_FULL_REPACK:-}" 574 | then 575 | Keeplist= 576 | Repack_limit=0 577 | fi 578 | 579 | pick_fields_1_2 @r_del_list "$Packlist" 580 | 581 | n_=$(line_count "$Packlist") 582 | m_=$(line_count "$Keeplist") 583 | if iseq 0 "$(( $Repack_limit < ($n_ - $m_) ))"; then 584 | return 585 | fi 586 | echo_info "Repacking remote $NAME, ..." 587 | 588 | mkdir "$Tempdir/pack" 589 | 590 | # Split packages to keep and to repack 591 | if isnonnull "$Keeplist"; then 592 | while read -r _ kline_ _ # < (if sha-1 exists locally) 681 | r_revlist=$(xfeed "$Refslist" cut -f 1 -d ' ' | 682 | safe_git_rev_parse | sed -e 's/^\(.\)/^&/') 683 | fi 684 | 685 | while IFS=: read -r src_ dst_ # << +src:dst 686 | do 687 | src_=${src_#+} 688 | filter_to ! @Refslist "$Hex40 $dst_" "$Refslist" 689 | 690 | if isnonnull "$src_" 691 | then 692 | append_to @r_revlist "$src_" 693 | obj_=$(xfeed "$src_" safe_git_rev_parse) 694 | append_to @Refslist "$obj_ $dst_" 695 | fi 696 | done < "$tmp_objlist" 707 | 708 | # Only send pack if we have any objects to send 709 | if [ -s "$tmp_objlist" ] 710 | then 711 | key_=$(genkey "$Packkey_bytes") 712 | pack_id=$(export GIT_ALTERNATE_OBJECT_DIRECTORIES=$Tempdir; 713 | pipefail git pack-objects --stdout < "$tmp_objlist" | 714 | pipefail ENCRYPT "$key_" | 715 | tee "$tmp_encrypted" | gpg_hash "$Hashtype") 716 | 717 | append_to @Packlist "pack :${Hashtype}:$pack_id $key_" 718 | if isnonnull "$r_pack_delete" 719 | then 720 | append_to @Keeplist "keep :${Hashtype}:$pack_id 1" 721 | fi 722 | fi 723 | 724 | # Generate manifest 725 | echo_info "Encrypting to: $Recipients" 726 | echo_info "Requesting manifest signature" 727 | 728 | tmp_manifest="$Tempdir/maniP" 729 | PRIVENCRYPT "$Recipients" > "$tmp_manifest" <&2 779 | } 780 | 781 | # handle git-remote-helpers protocol 782 | gcrypt_main_loop() 783 | { 784 | local input_= input_inner= r_args= temp_key= 785 | 786 | NAME=$1 # Remote name 787 | URL=$2 # Remote URL 788 | 789 | mkdir -p "$Localdir" 790 | 791 | # Set up a subdirectory in /tmp 792 | temp_key=$(genkey 9 | tr '/' _) 793 | Tempdir="${TMPDIR:-/tmp}/git-remote-gcrypt-${temp_key}.$$" 794 | mkdir -m 700 "${Tempdir}" 795 | 796 | trap cleanup_tmpfiles EXIT 797 | trap 'exit 1' 1 2 3 15 798 | 799 | echo_info "Development version -- Repository format MAY CHANGE" 800 | 801 | while read input_ 802 | do 803 | case "$input_" in 804 | capabilities) 805 | do_capabilities 806 | ;; 807 | list|list\ for-push) 808 | do_list 809 | ;; 810 | fetch\ *) 811 | r_args=${input_##fetch } 812 | while read input_inner 813 | do 814 | case "$input_inner" in 815 | fetch*) 816 | r_args= #ignored 817 | ;; 818 | *) 819 | break 820 | ;; 821 | esac 822 | done 823 | do_fetch "$r_args" 824 | ;; 825 | push\ *) 826 | r_args=${input_##push } 827 | while read input_inner 828 | do 829 | case "$input_inner" in 830 | push\ *) 831 | append_to @r_args "${input_inner#push }" 832 | ;; 833 | *) 834 | break 835 | ;; 836 | esac 837 | done 838 | do_push "$r_args" 839 | ;; 840 | ?*) 841 | echo_die "Unknown input!" 842 | ;; 843 | *) 844 | CLEAN_FINAL "$URL" 845 | exit 0 846 | ;; 847 | esac 848 | done 849 | } 850 | 851 | gcrypt_main_loop "$@" 852 | -------------------------------------------------------------------------------- /install.sh: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | 3 | set -e 4 | 5 | : ${prefix:=/usr/local} 6 | : ${DESTDIR:=} 7 | 8 | verbose() { echo "$@" >&2 && "$@"; } 9 | install_v() 10 | { 11 | # Install $1 into $2/ with mode $3 12 | verbose install -d "$2" && 13 | verbose install -m "$3" "$1" "$2" 14 | } 15 | 16 | install_v git-remote-gcrypt "$DESTDIR$prefix/bin" 755 17 | 18 | if command -v rst2man >/dev/null 19 | then 20 | trap 'rm -f git-remote-gcrypt.1.gz' EXIT 21 | verbose rst2man ./README.rst | gzip -9 > git-remote-gcrypt.1.gz 22 | install_v git-remote-gcrypt.1.gz "$DESTDIR$prefix/share/man/man1" 644 23 | else 24 | echo "'rst2man' not found, man page not installed" >&2 25 | fi 26 | --------------------------------------------------------------------------------