update noVNC to 1.5.0

Signed-off-by: si458 <simonsmith5521@gmail.com>

public/novnc/core/crypto/aes.js

@@ -0,0 +1,178 @@
+export class AESECBCipher {
+    constructor() {
+        this._key = null;
+    }
+
+    get algorithm() {
+        return { name: "AES-ECB" };
+    }
+
+    static async importKey(key, _algorithm, extractable, keyUsages) {
+        const cipher = new AESECBCipher;
+        await cipher._importKey(key, extractable, keyUsages);
+        return cipher;
+    }
+
+    async _importKey(key, extractable, keyUsages) {
+        this._key = await window.crypto.subtle.importKey(
+            "raw", key, {name: "AES-CBC"}, extractable, keyUsages);
+    }
+
+    async encrypt(_algorithm, plaintext) {
+        const x = new Uint8Array(plaintext);
+        if (x.length % 16 !== 0 || this._key === null) {
+            return null;
+        }
+        const n = x.length / 16;
+        for (let i = 0; i < n; i++) {
+            const y = new Uint8Array(await window.crypto.subtle.encrypt({
+                name: "AES-CBC",
+                iv: new Uint8Array(16),
+            }, this._key, x.slice(i * 16, i * 16 + 16))).slice(0, 16);
+            x.set(y, i * 16);
+        }
+        return x;
+    }
+}
+
+export class AESEAXCipher {
+    constructor() {
+        this._rawKey = null;
+        this._ctrKey = null;
+        this._cbcKey = null;
+        this._zeroBlock = new Uint8Array(16);
+        this._prefixBlock0 = this._zeroBlock;
+        this._prefixBlock1 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]);
+        this._prefixBlock2 = new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2]);
+    }
+
+    get algorithm() {
+        return { name: "AES-EAX" };
+    }
+
+    async _encryptBlock(block) {
+        const encrypted = await window.crypto.subtle.encrypt({
+            name: "AES-CBC",
+            iv: this._zeroBlock,
+        }, this._cbcKey, block);
+        return new Uint8Array(encrypted).slice(0, 16);
+    }
+
+    async _initCMAC() {
+        const k1 = await this._encryptBlock(this._zeroBlock);
+        const k2 = new Uint8Array(16);
+        const v = k1[0] >>> 6;
+        for (let i = 0; i < 15; i++) {
+            k2[i] = (k1[i + 1] >> 6) | (k1[i] << 2);
+            k1[i] = (k1[i + 1] >> 7) | (k1[i] << 1);
+        }
+        const lut = [0x0, 0x87, 0x0e, 0x89];
+        k2[14] ^= v >>> 1;
+        k2[15] = (k1[15] << 2) ^ lut[v];
+        k1[15] = (k1[15] << 1) ^ lut[v >> 1];
+        this._k1 = k1;
+        this._k2 = k2;
+    }
+
+    async _encryptCTR(data, counter) {
+        const encrypted = await window.crypto.subtle.encrypt({
+            name: "AES-CTR",
+            counter: counter,
+            length: 128
+        }, this._ctrKey, data);
+        return new Uint8Array(encrypted);
+    }
+
+    async _decryptCTR(data, counter) {
+        const decrypted = await window.crypto.subtle.decrypt({
+            name: "AES-CTR",
+            counter: counter,
+            length: 128
+        }, this._ctrKey, data);
+        return new Uint8Array(decrypted);
+    }
+
+    async _computeCMAC(data, prefixBlock) {
+        if (prefixBlock.length !== 16) {
+            return null;
+        }
+        const n = Math.floor(data.length / 16);
+        const m = Math.ceil(data.length / 16);
+        const r = data.length - n * 16;
+        const cbcData = new Uint8Array((m + 1) * 16);
+        cbcData.set(prefixBlock);
+        cbcData.set(data, 16);
+        if (r === 0) {
+            for (let i = 0; i < 16; i++) {
+                cbcData[n * 16 + i] ^= this._k1[i];
+            }
+        } else {
+            cbcData[(n + 1) * 16 + r] = 0x80;
+            for (let i = 0; i < 16; i++) {
+                cbcData[(n + 1) * 16 + i] ^= this._k2[i];
+            }
+        }
+        let cbcEncrypted = await window.crypto.subtle.encrypt({
+            name: "AES-CBC",
+            iv: this._zeroBlock,
+        }, this._cbcKey, cbcData);
+
+        cbcEncrypted = new Uint8Array(cbcEncrypted);
+        const mac = cbcEncrypted.slice(cbcEncrypted.length - 32, cbcEncrypted.length - 16);
+        return mac;
+    }
+
+    static async importKey(key, _algorithm, _extractable, _keyUsages) {
+        const cipher = new AESEAXCipher;
+        await cipher._importKey(key);
+        return cipher;
+    }
+
+    async _importKey(key) {
+        this._rawKey = key;
+        this._ctrKey = await window.crypto.subtle.importKey(
+            "raw", key, {name: "AES-CTR"}, false, ["encrypt", "decrypt"]);
+        this._cbcKey = await window.crypto.subtle.importKey(
+            "raw", key, {name: "AES-CBC"}, false, ["encrypt"]);
+        await this._initCMAC();
+    }
+
+    async encrypt(algorithm, message) {
+        const ad = algorithm.additionalData;
+        const nonce = algorithm.iv;
+        const nCMAC = await this._computeCMAC(nonce, this._prefixBlock0);
+        const encrypted = await this._encryptCTR(message, nCMAC);
+        const adCMAC = await this._computeCMAC(ad, this._prefixBlock1);
+        const mac = await this._computeCMAC(encrypted, this._prefixBlock2);
+        for (let i = 0; i < 16; i++) {
+            mac[i] ^= nCMAC[i] ^ adCMAC[i];
+        }
+        const res = new Uint8Array(16 + encrypted.length);
+        res.set(encrypted);
+        res.set(mac, encrypted.length);
+        return res;
+    }
+
+    async decrypt(algorithm, data) {
+        const encrypted = data.slice(0, data.length - 16);
+        const ad = algorithm.additionalData;
+        const nonce = algorithm.iv;
+        const mac = data.slice(data.length - 16);
+        const nCMAC = await this._computeCMAC(nonce, this._prefixBlock0);
+        const adCMAC = await this._computeCMAC(ad, this._prefixBlock1);
+        const computedMac = await this._computeCMAC(encrypted, this._prefixBlock2);
+        for (let i = 0; i < 16; i++) {
+            computedMac[i] ^= nCMAC[i] ^ adCMAC[i];
+        }
+        if (computedMac.length !== mac.length) {
+            return null;
+        }
+        for (let i = 0; i < mac.length; i++) {
+            if (computedMac[i] !== mac[i]) {
+                return null;
+            }
+        }
+        const res = await this._decryptCTR(encrypted, nCMAC);
+        return res;
+    }
+}