ucan 0.4.0

Implement UCAN-based authorization with conciseness and ease!
Documentation 
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

use super::fixtures::{Identities, SUPPORTED_KEYS};
use crate::{
    builder::UcanBuilder,
    chain::ProofChain,
    crypto::did::DidParser,
    store::{MemoryStore, UcanJwtStore},
    time::now,
};

#[cfg(target_arch = "wasm32")]
use wasm_bindgen_test::{wasm_bindgen_test, wasm_bindgen_test_configure};

#[cfg(target_arch = "wasm32")]
wasm_bindgen_test_configure!(run_in_browser);

#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
#[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
pub async fn it_decodes_deep_ucan_chains() {
    let identities = Identities::new().await;
    let mut did_parser = DidParser::new(SUPPORTED_KEYS);

    let leaf_ucan = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let delegated_token = UcanBuilder::default()
        .issued_by(&identities.bob_key)
        .for_audience(identities.mallory_did.as_str())
        .with_lifetime(50)
        .witnessed_by(&leaf_ucan, None)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap()
        .encode()
        .unwrap();

    let mut store = MemoryStore::default();
    store
        .write_token(&leaf_ucan.encode().unwrap())
        .await
        .unwrap();

    let chain =
        ProofChain::try_from_token_string(delegated_token.as_str(), None, &mut did_parser, &store)
            .await
            .unwrap();

    assert_eq!(chain.ucan().audience(), &identities.mallory_did);
    assert_eq!(
        chain.proofs().get(0).unwrap().ucan().issuer(),
        &identities.alice_did
    );
}

#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
#[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
pub async fn it_fails_with_incorrect_chaining() {
    let identities = Identities::new().await;
    let mut did_parser = DidParser::new(SUPPORTED_KEYS);

    let leaf_ucan = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let delegated_token = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.mallory_did.as_str())
        .with_lifetime(50)
        .witnessed_by(&leaf_ucan, None)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap()
        .encode()
        .unwrap();

    let mut store = MemoryStore::default();
    store
        .write_token(&leaf_ucan.encode().unwrap())
        .await
        .unwrap();

    let parse_token_result =
        ProofChain::try_from_token_string(delegated_token.as_str(), None, &mut did_parser, &store)
            .await;

    assert!(parse_token_result.is_err());
}

#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
#[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
pub async fn it_can_be_instantiated_by_cid() {
    let identities = Identities::new().await;
    let mut did_parser = DidParser::new(SUPPORTED_KEYS);

    let leaf_ucan = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let delegated_token = UcanBuilder::default()
        .issued_by(&identities.bob_key)
        .for_audience(identities.mallory_did.as_str())
        .with_lifetime(50)
        .witnessed_by(&leaf_ucan, None)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap()
        .encode()
        .unwrap();

    let mut store = MemoryStore::default();

    store
        .write_token(&leaf_ucan.encode().unwrap())
        .await
        .unwrap();

    let cid = store.write_token(&delegated_token).await.unwrap();

    let chain = ProofChain::from_cid(&cid, None, &mut did_parser, &store)
        .await
        .unwrap();

    assert_eq!(chain.ucan().audience(), &identities.mallory_did);
    assert_eq!(
        chain.proofs().get(0).unwrap().ucan().issuer(),
        &identities.alice_did
    );
}

#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
#[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
pub async fn it_can_handle_multiple_leaves() {
    let identities = Identities::new().await;
    let mut did_parser = DidParser::new(SUPPORTED_KEYS);

    let leaf_ucan_1 = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let leaf_ucan_2 = UcanBuilder::default()
        .issued_by(&identities.mallory_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let delegated_token = UcanBuilder::default()
        .issued_by(&identities.bob_key)
        .for_audience(identities.alice_did.as_str())
        .with_lifetime(50)
        .witnessed_by(&leaf_ucan_1, None)
        .witnessed_by(&leaf_ucan_2, None)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap()
        .encode()
        .unwrap();

    let mut store = MemoryStore::default();
    store
        .write_token(&leaf_ucan_1.encode().unwrap())
        .await
        .unwrap();
    store
        .write_token(&leaf_ucan_2.encode().unwrap())
        .await
        .unwrap();

    ProofChain::try_from_token_string(&delegated_token, None, &mut did_parser, &store)
        .await
        .unwrap();
}

#[cfg_attr(target_arch = "wasm32", wasm_bindgen_test)]
#[cfg_attr(not(target_arch = "wasm32"), tokio::test)]
pub async fn it_can_use_a_custom_timestamp_to_validate_a_ucan() {
    let identities = Identities::new().await;
    let mut did_parser = DidParser::new(SUPPORTED_KEYS);

    let leaf_ucan = UcanBuilder::default()
        .issued_by(&identities.alice_key)
        .for_audience(identities.bob_did.as_str())
        .with_lifetime(60)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap();

    let delegated_token = UcanBuilder::default()
        .issued_by(&identities.bob_key)
        .for_audience(identities.mallory_did.as_str())
        .with_lifetime(50)
        .witnessed_by(&leaf_ucan, None)
        .build()
        .unwrap()
        .sign()
        .await
        .unwrap()
        .encode()
        .unwrap();

    let mut store = MemoryStore::default();

    store
        .write_token(&leaf_ucan.encode().unwrap())
        .await
        .unwrap();

    let cid = store.write_token(&delegated_token).await.unwrap();

    let valid_chain = ProofChain::from_cid(&cid, Some(now()), &mut did_parser, &store).await;

    assert!(valid_chain.is_ok());

    let invalid_chain = ProofChain::from_cid(&cid, Some(now() + 61), &mut did_parser, &store).await;

    assert!(invalid_chain.is_err());
}