-
Notifications
You must be signed in to change notification settings - Fork 28.1k
/
cfrg_curves_bits.js
298 lines (265 loc) · 18.3 KB
/
cfrg_curves_bits.js
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
function define_tests() {
// May want to test prefixed implementations.
var subtle = self.crypto.subtle;
var pkcs8 = {
"X25519": new Uint8Array([48, 46, 2, 1, 0, 48, 5, 6, 3, 43, 101, 110, 4, 34, 4, 32, 200, 131, 142, 118, 208, 87, 223, 183, 216, 201, 90, 105, 225, 56, 22, 10, 221, 99, 115, 253, 113, 164, 210, 118, 187, 86, 227, 168, 27, 100, 255, 97]),
"X448": new Uint8Array([48, 70, 2, 1, 0, 48, 5, 6, 3, 43, 101, 111, 4, 58, 4, 56, 88, 199, 210, 154, 62, 181, 25, 178, 157, 0, 207, 177, 145, 187, 100, 252, 109, 138, 66, 216, 241, 113, 118, 39, 43, 137, 242, 39, 45, 24, 25, 41, 92, 101, 37, 192, 130, 150, 113, 176, 82, 239, 7, 39, 83, 15, 24, 142, 49, 208, 204, 83, 191, 38, 146, 158])
};
var spki = {
"X25519": new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 28, 242, 177, 230, 2, 46, 197, 55, 55, 30, 215, 245, 62, 84, 250, 17, 84, 216, 62, 152, 235, 100, 234, 81, 250, 229, 179, 48, 124, 254, 151, 6]),
"X448": new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 182, 4, 161, 209, 165, 205, 29, 148, 38, 213, 97, 239, 99, 10, 158, 177, 108, 190, 105, 213, 185, 202, 97, 94, 220, 83, 99, 62, 251, 82, 234, 49, 230, 230, 160, 161, 219, 172, 198, 231, 108, 188, 230, 72, 45, 126, 75, 163, 213, 93, 158, 128, 39, 101, 206, 111])
};
var sizes = {
"X25519": 32,
"X448": 56
};
var derivations = {
"X25519": new Uint8Array([39, 104, 64, 157, 250, 185, 158, 194, 59, 140, 137, 185, 63, 245, 136, 2, 149, 247, 97, 118, 8, 143, 137, 228, 61, 254, 190, 126, 161, 149, 0, 8]),
"X448": new Uint8Array([240, 246, 197, 241, 127, 148, 244, 41, 30, 171, 113, 120, 134, 109, 55, 236, 137, 6, 221, 108, 81, 65, 67, 220, 133, 190, 124, 242, 141, 239, 243, 155, 114, 110, 15, 109, 207, 129, 14, 181, 148, 220, 169, 123, 72, 130, 189, 68, 196, 62, 167, 220, 103, 244, 154, 78])
};
var kSmallOrderPoint = {
"X25519": [
{ order: "0", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
{ order: "1", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
{ order: "8", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 224, 235, 122, 124, 59, 65, 184, 174, 22, 86, 227, 250, 241, 159, 196, 106, 218, 9, 141, 235, 156, 50, 177, 253, 134, 98, 5, 22, 95, 73, 184, 0]) },
{ order: "p-1 (order 2)", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 236, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
{ order: "p (=0, order 4)", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 237, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
{ order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 42, 48, 5, 6, 3, 43, 101, 110, 3, 33, 0, 238, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 127]) },
],
"X448": [
{ order: "0", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
{ order: "1", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]) },
{ order: "p-1 (order 2)", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
{ order: "p (=0, order 4)", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
{ order: "p+1 (=1, order 1)", vector : new Uint8Array([48, 66, 48, 5, 6, 3, 43, 101, 111, 3, 57, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255]) },
]
};
// Verify the derive functions perform checks against the all-zero value results,
// ensuring small-order points are rejected.
// https://www.rfc-editor.org/rfc/rfc7748#section-6.1
// TODO: The spec states that the check must be done on use, but there is discussion about doing it on import.
// https://github.com/WICG/webcrypto-secure-curves/pull/13
Object.keys(kSmallOrderPoint).forEach(function(algorithmName) {
kSmallOrderPoint[algorithmName].forEach(function(test) {
promise_test(async() => {
let derived;
let privateKey = await subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveBits", "deriveKey"]);
let publicKey = await subtle.importKey("spki", test.vector,
{name: algorithmName},
false, [])
try {
derived = await subtle.deriveKey({name: algorithmName, public: publicKey}, privateKey,
{name: "HMAC", hash: "SHA-256", length: 256}, true,
["sign", "verify"]);
} catch (err) {
assert_false(privateKey === undefined, "Private key should be valid.");
assert_false(publicKey === undefined, "Public key should be valid.");
assert_equals(err.name, "OperationError", "Should throw correct error, not " + err.name + ": " + err.message + ".");
}
assert_equals(derived, undefined, "Operation succeeded, but should not have.");
}, algorithmName + " key derivation checks for all-zero value result with a key of order " + test.order);
});
});
return importKeys(pkcs8, spki, sizes)
.then(function(results) {
publicKeys = results.publicKeys;
privateKeys = results.privateKeys;
noDeriveBitsKeys = results.noDeriveBitsKeys;
Object.keys(sizes).forEach(function(algorithmName) {
// Basic success case
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_true(equalBuffers(derivation, derivations[algorithmName]), "Derived correct bits");
}, function(err) {
assert_unreached("deriveBits failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " good parameters");
// Case insensitivity check
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName.toLowerCase(), public: publicKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_true(equalBuffers(derivation, derivations[algorithmName]), "Derived correct bits");
}, function(err) {
assert_unreached("deriveBits failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " mixed case parameters");
// Null length
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], null)
.then(function(derivation) {
assert_true(equalBuffers(derivation, derivations[algorithmName]), "Derived correct bits");
}, function(err) {
assert_unreached("deriveBits failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " with null length");
// Shorter than entire derivation per algorithm
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName] - 32)
.then(function(derivation) {
assert_true(equalBuffers(derivation, derivations[algorithmName], 8 * sizes[algorithmName] - 32), "Derived correct bits");
}, function(err) {
assert_unreached("deriveBits failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " short result");
// Non-multiple of 8
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName] - 11)
.then(function(derivation) {
assert_true(equalBuffers(derivation, derivations[algorithmName], 8 * sizes[algorithmName] - 11), "Derived correct bits");
}, function(err) {
assert_unreached("deriveBits failed with error " + err.name + ": " + err.message);
});
}, algorithmName + " non-multiple of 8 bits");
// Errors to test:
// - missing public property TypeError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with TypeError");
}, function(err) {
assert_equals(err.name, "TypeError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " missing public property");
// - Non CryptoKey public property TypeError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: {message: "Not a CryptoKey"}}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with TypeError");
}, function(err) {
assert_equals(err.name, "TypeError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " public property of algorithm is not a CryptoKey");
// - wrong algorithm
promise_test(function(test) {
publicKey = publicKeys["X25519"];
if (algorithmName === "X25519") {
publicKey = publicKeys["X448"];
}
return subtle.deriveBits({name: algorithmName, public: publicKey}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " mismatched algorithms");
// - No deriveBits usage in baseKey InvalidAccessError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, noDeriveBitsKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " no deriveBits usage for base key");
// - Use public key for baseKey InvalidAccessError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, publicKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " base key is not a private key");
// - Use private key for public property InvalidAccessError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: privateKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " public property value is a private key");
// - Use secret key for public property InvalidAccessError
promise_test(function(test) {
return subtle.generateKey({name: "AES-CBC", length: 128}, true, ["encrypt", "decrypt"])
.then(function(secretKey) {
return subtle.deriveBits({name: algorithmName, public: secretKey}, privateKeys[algorithmName], 8 * sizes[algorithmName])
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with InvalidAccessError");
}, function(err) {
assert_equals(err.name, "InvalidAccessError", "Should throw correct error, not " + err.name + ": " + err.message);
});
});
}, algorithmName + " public property value is a secret key");
// - Length greater than possible for particular curves OperationError
promise_test(function(test) {
return subtle.deriveBits({name: algorithmName, public: publicKeys[algorithmName]}, privateKeys[algorithmName], 8 * sizes[algorithmName] + 8)
.then(function(derivation) {
assert_unreached("deriveBits succeeded but should have failed with OperationError");
}, function(err) {
assert_equals(err.name, "OperationError", "Should throw correct error, not " + err.name + ": " + err.message);
});
}, algorithmName + " asking for too many bits");
});
});
function importKeys(pkcs8, spki, sizes) {
var privateKeys = {};
var publicKeys = {};
var noDeriveBitsKeys = {};
var promises = [];
Object.keys(pkcs8).forEach(function(algorithmName) {
var operation = subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveBits", "deriveKey"])
.then(function(key) {
privateKeys[algorithmName] = key;
}, function (err) {
privateKeys[algorithmName] = null;
});
promises.push(operation);
});
Object.keys(pkcs8).forEach(function(algorithmName) {
var operation = subtle.importKey("pkcs8", pkcs8[algorithmName],
{name: algorithmName},
false, ["deriveKey"])
.then(function(key) {
noDeriveBitsKeys[algorithmName] = key;
}, function (err) {
noDeriveBitsKeys[algorithmName] = null;
});
promises.push(operation);
});
Object.keys(spki).forEach(function(algorithmName) {
var operation = subtle.importKey("spki", spki[algorithmName],
{name: algorithmName},
false, [])
.then(function(key) {
publicKeys[algorithmName] = key;
}, function (err) {
publicKeys[algorithmName] = null;
});
promises.push(operation);
});
return Promise.all(promises)
.then(function(results) {return {privateKeys: privateKeys, publicKeys: publicKeys, noDeriveBitsKeys: noDeriveBitsKeys}});
}
// Compares two ArrayBuffer or ArrayBufferView objects. If bitCount is
// omitted, the two values must be the same length and have the same contents
// in every byte. If bitCount is included, only that leading number of bits
// have to match.
function equalBuffers(a, b, bitCount) {
var remainder;
if (typeof bitCount === "undefined" && a.byteLength !== b.byteLength) {
return false;
}
var aBytes = new Uint8Array(a);
var bBytes = new Uint8Array(b);
var length = a.byteLength;
if (typeof bitCount !== "undefined") {
length = Math.floor(bitCount / 8);
}
for (var i=0; i<length; i++) {
if (aBytes[i] !== bBytes[i]) {
return false;
}
}
if (typeof bitCount !== "undefined") {
remainder = bitCount % 8;
return aBytes[length] >> (8 - remainder) === bBytes[length] >> (8 - remainder);
}
return true;
}
}