@simplito/privmx-webendpoint/dist/webStreams/KeyStore.js

PrivMX Web Endpoint library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.KeyStore = void 0;
const AES_GCM_KEY_LENGTH_BYTES = 32;
class KeyStore {
    _keys = new Map();
    _encryptionKeyId = undefined;
    setKeys(keys) {
        this._keys.clear();
        this._encryptionKeyId = undefined;
        for (const k of keys) {
            const rawKey = new Uint8Array(k.key);
            this.assertKeyBytes(rawKey);
            this._keys.set(k.keyId, {
                keyId: k.keyId,
                cryptoKey: crypto.subtle.importKey("raw", rawKey, { name: "AES-GCM" }, false, [
                    "encrypt",
                    "decrypt",
                ]),
                type: k.type,
            });
            if (k.type === 0) {
                this._encryptionKeyId = k.keyId;
            }
        }
    }
    async getKey(keyId) {
        const key = this._keys.get(keyId);
        return key ? key.cryptoKey : undefined;
    }
    hasKey(keyId) {
        return this._keys.has(keyId);
    }
    async getEncriptionKey() {
        if (!this._encryptionKeyId) {
            throw new Error("No encryption key set.");
        }
        return this._keys.get(this._encryptionKeyId).cryptoKey;
    }
    getEncryptionKeyId() {
        if (!this._encryptionKeyId) {
            throw new Error("No encryption key set.");
        }
        return this._encryptionKeyId;
    }
    assertKeyBytes(keyBytes) {
        if (keyBytes.length !== AES_GCM_KEY_LENGTH_BYTES) {
            throw new Error(`Invalid key length: ${keyBytes.length}`);
        }
    }
}
exports.KeyStore = KeyStore;