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
|
use std::fmt;
#[cfg(any(test, feature = "quickcheck"))]
use quickcheck::{Arbitrary, Gen};
/// A long identifier for certificates and keys.
///
/// A fingerprint uniquely identifies a public key. For more details
/// about how a fingerprint is generated, see [Section 12.2 of RFC
/// 4880].
///
/// [Section 12.2 of RFC 4880]: https://tools.ietf.org/html/rfc4880#section-12.2
///
/// Note: This enum cannot be exhaustively matched to allow future
/// extensions.
#[derive(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
pub enum Fingerprint {
/// 20 byte SHA-1 hash.
V4([u8;20]),
/// Used for holding fingerprints that we don't understand. For
/// instance, we don't grok v3 fingerprints.
Invalid(Box<[u8]>),
/// This marks this enum as non-exhaustive. Do not use this
/// variant.
#[doc(hidden)] __Nonexhaustive,
}
impl fmt::Display for Fingerprint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.convert_to_string(true))
}
}
impl fmt::Debug for Fingerprint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_tuple("Fingerprint")
.field(&self.to_string())
.finish()
}
}
impl fmt::UpperHex for Fingerprint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(&self.convert_to_string(false))
}
}
impl fmt::LowerHex for Fingerprint {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut hex = self.convert_to_string(false);
hex.make_ascii_lowercase();
f.write_str(&hex)
}
}
impl std::str::FromStr for Fingerprint {
type Err = anyhow::Error;
fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
Ok(Self::from_bytes(&crate::fmt::hex::decode_pretty(s)?[..]))
}
}
impl Fingerprint {
/// Reads a binary fingerprint.
pub fn from_bytes(raw: &[u8]) -> Fingerprint {
if raw.len() == 20 {
let mut fp : [u8; 20] = Default::default();
fp.copy_from_slice(raw);
Fingerprint::V4(fp)
} else {
Fingerprint::Invalid(raw.to_vec().into_boxed_slice())
}
}
/// Returns a reference to the raw Fingerprint.
pub fn as_bytes(&self) -> &[u8] {
match self {
&Fingerprint::V4(ref fp) => fp,
&Fingerprint::Invalid(ref fp) => fp,
Fingerprint::__Nonexhaustive => unreachable!(),
}
}
/// Converts this fingerprint to its canonical hexadecimal representation.
///
/// This representation is always uppercase and without spaces and is
/// suitable for stable key identifiers.
///
/// The output of this function is exactly the same as formatting this
/// object with the `:X` format specifier.
///
/// ```rust
/// # extern crate sequoia_openpgp as openpgp;
/// use openpgp::Fingerprint;
///
/// let fpr = "0123 4567 89AB CDEF 0123 4567 89AB CDEF 0123 4567".parse::<Fingerprint>().unwrap();
///
/// assert_eq!("0123456789ABCDEF0123456789ABCDEF01234567", fpr.to_hex());
/// assert_eq!(format!("{:X}", fpr), fpr.to_hex());
/// ```
pub fn to_hex(&self) -> String {
format!("{:X}", self)
}
/// Parses the hexadecimal representation of an OpenPGP fingerprint.
///
/// This function is the reverse of `to_hex`. It also accepts other variants
/// of the fingerprint notation including lower-case letters, spaces and
/// optional leading `0x`.
///
/// ```rust
/// # extern crate sequoia_openpgp as openpgp;
/// use openpgp::Fingerprint;
///
/// let fpr = Fingerprint::from_hex("0123456789ABCDEF0123456789ABCDEF01234567").unwrap();
///
/// assert_eq!("0123456789ABCDEF0123456789ABCDEF01234567", fpr.to_hex());
///
/// let fpr = Fingerprint::from_hex("0123 4567 89ab cdef 0123 4567 89ab cdef 0123 4567").unwrap();
///
/// assert_eq!("0123456789ABCDEF0123456789ABCDEF01234567", fpr.to_hex());
/// ```
pub fn from_hex(s: &str) -> std::result::Result<Self, anyhow::Error> {
std::str::FromStr::from_str(s)
}
/// Common code for the above functions.
fn convert_to_string(&self, pretty: bool) -> String {
let raw = match self {
&Fingerprint::V4(ref fp) => &fp[..],
&Fingerprint::Invalid(ref fp) => &fp[..],
Fingerprint::__Nonexhaustive => unreachable!(),
};
// We currently only handle V4 fingerprints, which look like:
//
// 8F17 7771 18A3 3DDA 9BA4 8E62 AACB 3243 6300 52D9
//
// Since we have no idea how to format an invalid fingerprint,
// just format it like a V4 fingerprint and hope for the best.
let mut output = Vec::with_capacity(
// Each byte results in to hex characters.
raw.len() * 2
+ if pretty {
// Every 2 bytes of output, we insert a space.
raw.len() / 2
// After 5 groups, there is another space.
+ raw.len() / 10
} else { 0 });
for (i, b) in raw.iter().enumerate() {
if pretty && i > 0 && i % 2 == 0 {
output.push(' ' as u8);
}
if pretty && i > 0 && i % 10 == 0 {
output.push(' ' as u8);
}
let top = b >> 4;
let bottom = b & 0xFu8;
if top < 10u8 {
output.push('0' as u8 + top)
} else {
output.push('A' as u8 + (top - 10u8))
}
if bottom < 10u8 {
output.push('0' as u8 + bottom)
} else {
output.push('A' as u8 + (bottom - 10u8))
}
}
// We know the content is valid UTF-8.
String::from_utf8(output).unwrap()
}
/// Converts the hex representation of the fingerprint to a phrase in the
/// ICAO alphabet.
pub fn to_icao(&self) -> String {
let mut ret = String::default();
for ch in self.convert_to_string(false).chars() {
let word = match ch {
'0' => "Zero",
'1' => "One",
'2' => "Two",
'3' => "Three",
'4' => "Four",
'5' => "Five",
'6' => "Six",
'7' => "Seven",
'8' => "Eight",
'9' => "Niner",
'A' => "Alfa",
'B' => "Bravo",
'C' => "Charlie",
'D' => "Delta",
'E' => "Echo",
'F' => "Foxtrot",
_ => { continue; }
};
if !ret.is_empty() {
ret.push_str(" ");
}
ret.push_str(word);
}
ret
}
}
#[cfg(any(test, feature = "quickcheck"))]
|