-
Notifications
You must be signed in to change notification settings - Fork 59
/
hashing.ts
171 lines (152 loc) · 5.06 KB
/
hashing.ts
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
import { LIT_ERROR } from '@lit-protocol/constants';
import {
AccessControlConditions,
ConditionItem,
EvmContractConditions,
JsonSigningResourceId,
SolRpcConditions,
UnifiedAccessControlConditions,
} from '@lit-protocol/types';
import { log, throwError } from '@lit-protocol/misc';
import {
canonicalAccessControlConditionFormatter,
canonicalEVMContractConditionFormatter,
canonicalResourceIdFormatter,
canonicalSolRpcConditionFormatter,
canonicalUnifiedAccessControlConditionFormatter,
} from './canonicalFormatter';
import { uint8arrayToString } from '@lit-protocol/uint8arrays';
/**
*
* Hash the unified access control conditions using SHA-256 in a deterministic way.
*
* @param { UnifiedAccessControlConditions } unifiedAccessControlConditions - The unified access control conditions to hash.
* @returns { Promise<ArrayBuffer> } A promise that resolves to an ArrayBuffer that contains the hash
*/
export const hashUnifiedAccessControlConditions = (
unifiedAccessControlConditions: UnifiedAccessControlConditions
): Promise<ArrayBuffer> => {
log('unifiedAccessControlConditions:', unifiedAccessControlConditions);
const conditions = unifiedAccessControlConditions.map(
(condition: ConditionItem) => {
return canonicalUnifiedAccessControlConditionFormatter(condition);
}
);
log('conditions:', conditions);
// check if there's any undefined in the conditions
const hasUndefined = conditions.some((c) => c === undefined);
if (hasUndefined) {
throwError({
message: 'Invalid access control conditions',
errorKind: LIT_ERROR.INVALID_ACCESS_CONTROL_CONDITIONS.kind,
errorCode: LIT_ERROR.INVALID_ACCESS_CONTROL_CONDITIONS.name,
});
}
if (conditions.length === 0) {
throwError({
message: 'No conditions provided',
errorKind: LIT_ERROR.INVALID_ACCESS_CONTROL_CONDITIONS.kind,
errorCode: LIT_ERROR.INVALID_ACCESS_CONTROL_CONDITIONS.name,
});
}
const toHash = JSON.stringify(conditions);
log('Hashing unified access control conditions: ', toHash);
const encoder = new TextEncoder();
const data = encoder.encode(toHash);
return crypto.subtle.digest('SHA-256', data);
};
/**
*
* Hash resource id
*
* @param { JsonSigningResourceId } resourceId
*
* @returns { Promise<ArrayBuffer> }
*
*/
export const hashResourceId = (
resourceId: JsonSigningResourceId
): Promise<ArrayBuffer> => {
const resId = canonicalResourceIdFormatter(resourceId);
const toHash = JSON.stringify(resId);
const encoder = new TextEncoder();
const data = encoder.encode(toHash);
return crypto.subtle.digest('SHA-256', data);
};
/**
*
* Hash resourceId for signing
*
* @param { JSONSigningResourceId } resourceId
*
* @returns { string } example: "5b36d72f2145af3617e5da2a8a626f9f42e64ed14340622bdfe1a6f0702b9e8d"
*/
export const hashResourceIdForSigning = async (
resourceId: JsonSigningResourceId
): Promise<string> => {
const hashed = await hashResourceId(resourceId);
return uint8arrayToString(new Uint8Array(hashed), 'base16');
};
/**
*
* Hash access control conditions
*
* @param { AccessControlConditions } accessControlConditions
*
* @returns { Promise<ArrayBuffer> } example: {"data": [83, 176, 31, 130, 12, 130, 232, 109, 126, 76, 216, 4, 184, 166, 246, 134, 130, 34, 30, 235, 125, 247, 111, 212, 62, 231, 119, 200, 202, 171, 86, 40], "type": "Buffer"}
*
*/
export const hashAccessControlConditions = (
accessControlConditions: AccessControlConditions
): Promise<ArrayBuffer> => {
const conds = accessControlConditions.map((c) =>
canonicalAccessControlConditionFormatter(c)
);
const toHash = JSON.stringify(conds);
log('Hashing access control conditions: ', toHash);
const encoder = new TextEncoder();
const data = encoder.encode(toHash);
return crypto.subtle.digest('SHA-256', data);
};
/**
*
* Hash EVM access control conditions
*
* @param { EvmContractConditions } evmContractConditions
*
* @returns { Promise<ArrayBuffer> } {"data": [216, 92, 128, 31, 171, 114, 74, 115, 133, 44, 234, 171, 214, 205, 228, 137, 117, 238, 14, 229, 254, 239, 97, 126, 1, 20, 166, 144, 176, 147, 217, 32], "type": "Buffer"}
*
*/
export const hashEVMContractConditions = (
evmContractConditions: EvmContractConditions
): Promise<ArrayBuffer> => {
const conds = evmContractConditions.map((c) =>
canonicalEVMContractConditionFormatter(c)
);
const toHash = JSON.stringify(conds);
log('Hashing evm contract conditions: ', toHash);
const encoder = new TextEncoder();
const data = encoder.encode(toHash);
return crypto.subtle.digest('SHA-256', data);
};
/**
*
* Hash SOL access control conditions
*
* @param { SolRpcConditions } solRpcConditions
*
* @returns { Promise<ArrayBuffer> }
*
*/
export const hashSolRpcConditions = (
solRpcConditions: SolRpcConditions
): Promise<ArrayBuffer> => {
const conds = solRpcConditions.map((c: any) =>
canonicalSolRpcConditionFormatter(c)
);
const toHash = JSON.stringify(conds);
log('Hashing sol rpc conditions: ', toHash);
const encoder = new TextEncoder();
const data = encoder.encode(toHash);
return crypto.subtle.digest('SHA-256', data);
};