initial commit

server/node_modules/jose/dist/browser/runtime/ecdhes.js

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+import { encoder, concat, uint32be, lengthAndInput, concatKdf } from '../lib/buffer_utils.js';
+import crypto, { isCryptoKey } from './webcrypto.js';
+import { checkEncCryptoKey } from '../lib/crypto_key.js';
+import invalidKeyInput from '../lib/invalid_key_input.js';
+import { types } from './is_key_like.js';
+export async function deriveKey(publicKey, privateKey, algorithm, keyLength, apu = new Uint8Array(0), apv = new Uint8Array(0)) {
+    if (!isCryptoKey(publicKey)) {
+        throw new TypeError(invalidKeyInput(publicKey, ...types));
+    }
+    checkEncCryptoKey(publicKey, 'ECDH');
+    if (!isCryptoKey(privateKey)) {
+        throw new TypeError(invalidKeyInput(privateKey, ...types));
+    }
+    checkEncCryptoKey(privateKey, 'ECDH', 'deriveBits');
+    const value = concat(lengthAndInput(encoder.encode(algorithm)), lengthAndInput(apu), lengthAndInput(apv), uint32be(keyLength));
+    let length;
+    if (publicKey.algorithm.name === 'X25519') {
+        length = 256;
+    }
+    else if (publicKey.algorithm.name === 'X448') {
+        length = 448;
+    }
+    else {
+        length =
+            Math.ceil(parseInt(publicKey.algorithm.namedCurve.substr(-3), 10) / 8) << 3;
+    }
+    const sharedSecret = new Uint8Array(await crypto.subtle.deriveBits({
+        name: publicKey.algorithm.name,
+        public: publicKey,
+    }, privateKey, length));
+    return concatKdf(sharedSecret, keyLength, value);
+}
+export async function generateEpk(key) {
+    if (!isCryptoKey(key)) {
+        throw new TypeError(invalidKeyInput(key, ...types));
+    }
+    return crypto.subtle.generateKey(key.algorithm, true, ['deriveBits']);
+}
+export function ecdhAllowed(key) {
+    if (!isCryptoKey(key)) {
+        throw new TypeError(invalidKeyInput(key, ...types));
+    }
+    return (['P-256', 'P-384', 'P-521'].includes(key.algorithm.namedCurve) ||
+        key.algorithm.name === 'X25519' ||
+        key.algorithm.name === 'X448');
+}