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6491ad4 | 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 | import { isJWK } from './type_checks.js';
import { decode } from '../util/base64url.js';
import { jwkToKey } from './jwk_to_key.js';
import { isCryptoKey, isKeyObject } from './is_key_like.js';
const unusableForAlg = 'given KeyObject instance cannot be used for this algorithm';
let cache;
const handleJWK = async (key, jwk, alg, freeze = false) => {
cache ||= new WeakMap();
let cached = cache.get(key);
if (cached?.[alg]) {
return cached[alg];
}
const cryptoKey = await jwkToKey({ ...jwk, alg });
if (freeze)
Object.freeze(key);
if (!cached) {
cache.set(key, { [alg]: cryptoKey });
}
else {
cached[alg] = cryptoKey;
}
return cryptoKey;
};
const handleKeyObject = (keyObject, alg) => {
cache ||= new WeakMap();
let cached = cache.get(keyObject);
if (cached?.[alg]) {
return cached[alg];
}
const isPublic = keyObject.type === 'public';
const extractable = isPublic ? true : false;
let cryptoKey;
if (keyObject.asymmetricKeyType === 'x25519') {
switch (alg) {
case 'ECDH-ES':
case 'ECDH-ES+A128KW':
case 'ECDH-ES+A192KW':
case 'ECDH-ES+A256KW':
break;
default:
throw new TypeError(unusableForAlg);
}
cryptoKey = keyObject.toCryptoKey(keyObject.asymmetricKeyType, extractable, isPublic ? [] : ['deriveBits']);
}
if (keyObject.asymmetricKeyType === 'ed25519') {
if (alg !== 'EdDSA' && alg !== 'Ed25519') {
throw new TypeError(unusableForAlg);
}
cryptoKey = keyObject.toCryptoKey(keyObject.asymmetricKeyType, extractable, [
isPublic ? 'verify' : 'sign',
]);
}
switch (keyObject.asymmetricKeyType) {
case 'ml-dsa-44':
case 'ml-dsa-65':
case 'ml-dsa-87': {
if (alg !== keyObject.asymmetricKeyType.toUpperCase()) {
throw new TypeError(unusableForAlg);
}
cryptoKey = keyObject.toCryptoKey(keyObject.asymmetricKeyType, extractable, [
isPublic ? 'verify' : 'sign',
]);
}
}
if (keyObject.asymmetricKeyType === 'rsa') {
let hash;
switch (alg) {
case 'RSA-OAEP':
hash = 'SHA-1';
break;
case 'RS256':
case 'PS256':
case 'RSA-OAEP-256':
hash = 'SHA-256';
break;
case 'RS384':
case 'PS384':
case 'RSA-OAEP-384':
hash = 'SHA-384';
break;
case 'RS512':
case 'PS512':
case 'RSA-OAEP-512':
hash = 'SHA-512';
break;
default:
throw new TypeError(unusableForAlg);
}
if (alg.startsWith('RSA-OAEP')) {
return keyObject.toCryptoKey({
name: 'RSA-OAEP',
hash,
}, extractable, isPublic ? ['encrypt'] : ['decrypt']);
}
cryptoKey = keyObject.toCryptoKey({
name: alg.startsWith('PS') ? 'RSA-PSS' : 'RSASSA-PKCS1-v1_5',
hash,
}, extractable, [isPublic ? 'verify' : 'sign']);
}
if (keyObject.asymmetricKeyType === 'ec') {
const nist = new Map([
['prime256v1', 'P-256'],
['secp384r1', 'P-384'],
['secp521r1', 'P-521'],
]);
const namedCurve = nist.get(keyObject.asymmetricKeyDetails?.namedCurve);
if (!namedCurve) {
throw new TypeError(unusableForAlg);
}
const expectedCurve = { ES256: 'P-256', ES384: 'P-384', ES512: 'P-521' };
if (expectedCurve[alg] && namedCurve === expectedCurve[alg]) {
cryptoKey = keyObject.toCryptoKey({
name: 'ECDSA',
namedCurve,
}, extractable, [isPublic ? 'verify' : 'sign']);
}
if (alg.startsWith('ECDH-ES')) {
cryptoKey = keyObject.toCryptoKey({
name: 'ECDH',
namedCurve,
}, extractable, isPublic ? [] : ['deriveBits']);
}
}
if (!cryptoKey) {
throw new TypeError(unusableForAlg);
}
if (!cached) {
cache.set(keyObject, { [alg]: cryptoKey });
}
else {
cached[alg] = cryptoKey;
}
return cryptoKey;
};
export async function normalizeKey(key, alg) {
if (key instanceof Uint8Array) {
return key;
}
if (isCryptoKey(key)) {
return key;
}
if (isKeyObject(key)) {
if (key.type === 'secret') {
return key.export();
}
if ('toCryptoKey' in key && typeof key.toCryptoKey === 'function') {
try {
return handleKeyObject(key, alg);
}
catch (err) {
if (err instanceof TypeError) {
throw err;
}
}
}
let jwk = key.export({ format: 'jwk' });
return handleJWK(key, jwk, alg);
}
if (isJWK(key)) {
if (key.k) {
return decode(key.k);
}
return handleJWK(key, key, alg, true);
}
throw new Error('unreachable');
}
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