1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
|
//! OpenPGP data types and associated machinery.
//!
//! This crate aims to provide a complete implementation of OpenPGP as
//! defined by [RFC 4880] as well as several extensions (e.g., [RFC
//! 6637], which describes ECC cryptography for OpenPGP, and [RFC
//! 4880bis], the draft of the next OpenPGP standard). This includes
//! support for unbuffered message processing.
//!
//! A few features that the OpenPGP community considers to be
//! deprecated (e.g., version 3 compatibility) have been left out as
//! well as support for functionality that we consider to be not only
//! completely useless, but also dangerous (e.g., support for
//! [unhashed signature subpackets]). We have also updated some
//! OpenPGP defaults to avoid foot guns (e.g., this crate does not
//! fallback to IDEA, but instead assumes all OpenPGP implementations
//! understand AES). If some functionality is missing, please file a
//! bug report.
//!
//! A non-goal of this crate is support for any sort of high-level,
//! bolted-on functionality. For instance, [RFC 4880] does not define
//! trust models, such as the web of trust, direct trust, or TOFU.
//! Neither does this crate. [RFC 4880] does provide some mechanisms
//! for creating trust models (specifically, UserID certifications),
//! and this crate does expose those mechanisms.
//!
//! We also try hard to avoid dictating how OpenPGP should be used.
//! This doesn't mean that we don't have opinions about how OpenPGP
//! should be used in a number of common scenarios (for instance,
//! message validation). But, in this crate, we refrain from
//! expressing those opinions; we expose an opinionated, high-level
//! interface in the [sequoia-core] and related crates. In our
//! opinion, you should generally use those crates instead of this
//! one.
//!
//! [RFC 4880]: https://tools.ietf.org/html/rfc4880
//! [RFC 6637]: https://tools.ietf.org/html/rfc6637
//! [RFC 4880bis]: https://tools.ietf.org/html/draft-ietf-openpgp-rfc4880bis-04
//! [unhashed signature subpackets]: https://tools.ietf.org/html/rfc4880#section-5.2.3.2
//! [sequoia-core]: ../sequoia_core
#[macro_use]
extern crate failure;
extern crate buffered_reader;
extern crate nettle;
extern crate flate2;
extern crate bzip2;
#[cfg(test)]
#[macro_use]
extern crate quickcheck;
#[cfg(not(test))]
extern crate quickcheck;
extern crate time;
pub mod armor;
pub mod ctb;
use ctb::{CTB, CTBOld, CTBNew};
pub mod packet;
use packet::{BodyLength, Header, Container};
pub mod parse;
use parse::SubpacketArea;
pub mod mpis;
pub mod tpk;
pub mod serialize;
mod hash;
pub mod symmetric;
pub mod s2k;
mod unknown;
mod signature;
mod one_pass_sig;
mod key;
mod userid;
mod user_attribute;
mod literal;
mod compressed_data;
mod skesk;
pub use skesk::SKESK;
pub mod ecdh;
mod pkesk;
pub use pkesk::PKESK;
mod reader;
pub use reader::Reader;
mod packet_pile;
mod message;
pub mod constants;
use constants::{
PublicKeyAlgorithm,
SymmetricAlgorithm,
CompressionAlgorithm,
HashAlgorithm,
SignatureType,
};
mod tag;
pub use tag::Tag;
mod fingerprint;
mod keyid;
#[cfg(test)]
use std::path::PathBuf;
#[cfg(test)]
fn path_to(artifact: &str) -> PathBuf {
[env!("CARGO_MANIFEST_DIR"), "tests", "data", "messages", artifact]
.iter().collect()
}
pub type Result<T> = ::std::result::Result<T, failure::Error>;
#[derive(Fail, Debug)]
/// Errors returned by this module.
pub enum Error {
#[fail(display = "Invalid argument: {}", _0)]
InvalidArgument(String),
#[fail(display = "Invalid operation: {}", _0)]
InvalidOperation(String),
/// A malformed packet.
#[fail(display = "Malformed packet: {}", _0)]
MalformedPacket(String),
#[fail(display = "Unknown packet type: {}", _0)]
UnknownPacketTag(Tag),
#[fail(display = "Unknown hash algorithm: {}", _0)]
UnknownHashAlgorithm(HashAlgorithm),
#[fail(display = "Unknown public key algorithm: {}", _0)]
UnknownPublicKeyAlgorithm(PublicKeyAlgorithm),
#[fail(display = "Unknown symmetric algorithm: {}", _0)]
UnknownSymmetricAlgorithm(SymmetricAlgorithm),
#[fail(display = "Unsupported hash algorithm: {}", _0)]
UnsupportedHashAlgorithm(HashAlgorithm),
#[fail(display = "Unsupported public key algorithm: {}", _0)]
UnsupportedPublicKeyAlgorithm(PublicKeyAlgorithm),
#[fail(display = "Unsupported elliptic curve: {}", _0)]
UnsupportedEllipticCurve(constants::Curve),
#[fail(display = "Unsupported symmetric algorithm: {}", _0)]
UnsupportedSymmetricAlgorithm(SymmetricAlgorithm),
#[fail(display = "Unsupported signature type: {}", _0)]
UnsupportedSignatureType(SignatureType),
#[fail(display = "Invalid password")]
InvalidPassword,
#[fail(display = "Invalid session key: {}", _0)]
InvalidSessionKey(String),
#[fail(display = "Malformed MPI: {}", _0)]
MalformedMPI(String),
#[fail(display = "Bad signature: {}", _0)]
BadSignature(String),
#[fail(display = "Malformed Message: {}", _0)]
MalformedMessage(String),
}
// A helpful debugging function.
#[allow(dead_code)]
fn to_hex(s: &[u8], pretty: bool) -> String {
use std::fmt::Write;
let mut result = String::new();
for (i, b) in s.iter().enumerate() {
// Add spaces every four digits to make the output more
// readable.
if pretty && i > 0 && i % 2 == 0 {
write!(&mut result, " ").unwrap();
}
write!(&mut result, "{:02X}", b).unwrap();
}
result
}
// A helpful function for converting a hexadecimal string to binary.
// This function skips whitespace if `skip_whipspace` is set.
fn from_hex(hex: &str, skip_whitespace: bool) -> Option<Vec<u8>> {
let nibbles = hex.as_bytes().iter().filter_map(|x| {
match *x as char {
'0' => Some(0u8),
'1' => Some(1u8),
'2' => Some(2u8),
'3' => Some(3u8),
'4' => Some(4u8),
'5' => Some(5u8),
'6' => Some(6
|