Merge branch 'crypto-cleanup-fallback' of https://github.com/pdlan/noVNC

10 files changed, 663 insertions, 413 deletions

diff --git a/core/crypto/aes.js b/core/crypto/aes.js
new file mode 100644
index 0000000..e6aaea7
--- /dev/null
+++ b/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;
+    }
+}
diff --git a/core/crypto/bigint.js b/core/crypto/bigint.js
new file mode 100644
index 0000000..d344326
--- /dev/null
+++ b/core/crypto/bigint.js
@@ -0,0 +1,34 @@
+export function modPow(b, e, m) {
+    let r = 1n;
+    b = b % m;
+    while (e > 0n) {
+        if ((e & 1n) === 1n) {
+            r = (r * b) % m;
+        }
+        e = e >> 1n;
+        b = (b * b) % m;
+    }
+    return r;
+}
+
+export function bigIntToU8Array(bigint, padLength=0) {
+    let hex = bigint.toString(16);
+    if (padLength === 0) {
+        padLength = Math.ceil(hex.length / 2);
+    }
+    hex = hex.padStart(padLength * 2, '0');
+    const length = hex.length / 2;
+    const arr = new Uint8Array(length);
+    for (let i = 0; i < length; i++) {
+        arr[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
+    }
+    return arr;
+}
+
+export function u8ArrayToBigInt(arr) {
+    let hex = '0x';
+    for (let i = 0; i < arr.length; i++) {
+        hex += arr[i].toString(16).padStart(2, '0');
+    }
+    return BigInt(hex);
+}
diff --git a/core/crypto/crypto.js b/core/crypto/crypto.js
new file mode 100644
index 0000000..cc17da2
--- /dev/null
+++ b/core/crypto/crypto.js
@@ -0,0 +1,90 @@
+import { AESECBCipher, AESEAXCipher } from "./aes.js";
+import { DESCBCCipher, DESECBCipher } from "./des.js";
+import { RSACipher } from "./rsa.js";
+import { DHCipher } from "./dh.js";
+import { MD5 } from "./md5.js";
+
+// A single interface for the cryptographic algorithms not supported by SubtleCrypto.
+// Both synchronous and asynchronous implmentations are allowed.
+class LegacyCrypto {
+    constructor() {
+        this._algorithms = {
+            "AES-ECB": AESECBCipher,
+            "AES-EAX": AESEAXCipher,
+            "DES-ECB": DESECBCipher,
+            "DES-CBC": DESCBCCipher,
+            "RSA-PKCS1-v1_5": RSACipher,
+            "DH": DHCipher,
+            "MD5": MD5,
+        };
+    }
+
+    encrypt(algorithm, key, data) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.encrypt !== "function") {
+            throw new Error("key does not support encryption");
+        }
+        return key.encrypt(algorithm, data);
+    }
+
+    decrypt(algorithm, key, data) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.decrypt !== "function") {
+            throw new Error("key does not support encryption");
+        }
+        return key.decrypt(algorithm, data);
+    }
+
+    importKey(format, keyData, algorithm, extractable, keyUsages) {
+        if (format !== "raw") {
+            throw new Error("key format is not supported");
+        }
+        const alg = this._algorithms[algorithm.name];
+        if (typeof alg === "undefined" || typeof alg.importKey !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg.importKey(keyData, algorithm, extractable, keyUsages);
+    }
+
+    generateKey(algorithm, extractable, keyUsages) {
+        const alg = this._algorithms[algorithm.name];
+        if (typeof alg === "undefined" || typeof alg.generateKey !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg.generateKey(algorithm, extractable, keyUsages);
+    }
+
+    exportKey(format, key) {
+        if (format !== "raw") {
+            throw new Error("key format is not supported");
+        }
+        if (typeof key.exportKey !== "function") {
+            throw new Error("key does not support exportKey");
+        }
+        return key.exportKey();
+    }
+
+    digest(algorithm, data) {
+        const alg = this._algorithms[algorithm];
+        if (typeof alg !== "function") {
+            throw new Error("algorithm is not supported");
+        }
+        return alg(data);
+    }
+
+    deriveBits(algorithm, key, length) {
+        if (key.algorithm.name !== algorithm.name) {
+            throw new Error("algorithm does not match");
+        }
+        if (typeof key.deriveBits !== "function") {
+            throw new Error("key does not support deriveBits");
+        }
+        return key.deriveBits(algorithm, length);
+    }
+}
+
+export default new LegacyCrypto;
diff --git a/core/des.js b/core/crypto/des.js
index ba1ebde..8dab31f 100644
--- a/core/des.js
+++ b/core/crypto/des.js
@@ -128,7 +128,7 @@ const SP8 = [b|f,z|e,a|z,c|f,b|z,b|f,z|d,b|z,a|d,c|z,c|f,a|e,c|e,a|f,z|e,z|d,
 
 /* eslint-enable comma-spacing */
 
-export default class DES {
+class DES {
     constructor(password) {
         this.keys = [];
 
@@ -258,9 +258,73 @@ export default class DES {
         }
         return b;
     }
+}
+
+export class DESECBCipher {
+    constructor() {
+        this._cipher = null;
+    }
+
+    get algorithm() {
+        return { name: "DES-ECB" };
+    }
+
+    static importKey(key, _algorithm, _extractable, _keyUsages) {
+        const cipher = new DESECBCipher;
+        cipher._importKey(key);
+        return cipher;
+    }
 
-    // Encrypt 16 bytes of text using passwd as key
-    encrypt(t) {
-        return this.enc8(t.slice(0, 8)).concat(this.enc8(t.slice(8, 16)));
+    _importKey(key, _extractable, _keyUsages) {
+        this._cipher = new DES(key);
+    }
+
+    encrypt(_algorithm, plaintext) {
+        const x = new Uint8Array(plaintext);
+        if (x.length % 8 !== 0 || this._cipher === null) {
+            return null;
+        }
+        const n = x.length / 8;
+        for (let i = 0; i < n; i++) {
+            x.set(this._cipher.enc8(x.slice(i * 8, i * 8 + 8)), i * 8);
+        }
+        return x;
+    }
+}
+
+export class DESCBCCipher {
+    constructor() {
+        this._cipher = null;
+    }
+
+    get algorithm() {
+        return { name: "DES-CBC" };
+    }
+
+    static importKey(key, _algorithm, _extractable, _keyUsages) {
+        const cipher = new DESCBCCipher;
+        cipher._importKey(key);
+        return cipher;
+    }
+
+    _importKey(key) {
+        this._cipher = new DES(key);
+    }
+
+    encrypt(algorithm, plaintext) {
+        const x = new Uint8Array(plaintext);
+        let y = new Uint8Array(algorithm.iv);
+        if (x.length % 8 !== 0 || this._cipher === null) {
+            return null;
+        }
+        const n = x.length / 8;
+        for (let i = 0; i < n; i++) {
+            for (let j = 0; j < 8; j++) {
+                y[j] ^= plaintext[i * 8 + j];
+            }
+            y = this._cipher.enc8(y);
+            x.set(y, i * 8);
+        }
+        return x;
     }
 }
diff --git a/core/crypto/dh.js b/core/crypto/dh.js
new file mode 100644
index 0000000..bd705d9
--- /dev/null
+++ b/core/crypto/dh.js
@@ -0,0 +1,55 @@
+import { modPow, bigIntToU8Array, u8ArrayToBigInt } from "./bigint.js";
+
+class DHPublicKey {
+    constructor(key) {
+        this._key = key;
+    }
+
+    get algorithm() {
+        return { name: "DH" };
+    }
+
+    exportKey() {
+        return this._key;
+    }
+}
+
+export class DHCipher {
+    constructor() {
+        this._g = null;
+        this._p = null;
+        this._gBigInt = null;
+        this._pBigInt = null;
+        this._privateKey = null;
+    }
+
+    get algorithm() {
+        return { name: "DH" };
+    }
+
+    static generateKey(algorithm, _extractable) {
+        const cipher = new DHCipher;
+        cipher._generateKey(algorithm);
+        return { privateKey: cipher, publicKey: new DHPublicKey(cipher._publicKey) };
+    }
+
+    _generateKey(algorithm) {
+        const g = algorithm.g;
+        const p = algorithm.p;
+        this._keyBytes = p.length;
+        this._gBigInt = u8ArrayToBigInt(g);
+        this._pBigInt = u8ArrayToBigInt(p);
+        this._privateKey = window.crypto.getRandomValues(new Uint8Array(this._keyBytes));
+        this._privateKeyBigInt = u8ArrayToBigInt(this._privateKey);
+        this._publicKey = bigIntToU8Array(modPow(
+            this._gBigInt, this._privateKeyBigInt, this._pBigInt), this._keyBytes);
+    }
+
+    deriveBits(algorithm, length) {
+        const bytes = Math.ceil(length / 8);
+        const pkey = new Uint8Array(algorithm.public);
+        const len = bytes > this._keyBytes ? bytes : this._keyBytes;
+        const secret = modPow(u8ArrayToBigInt(pkey), this._privateKeyBigInt, this._pBigInt);
+        return bigIntToU8Array(secret, len).slice(0, len);
+    }
+}
diff --git a/core/util/md5.js b/core/crypto/md5.js
index 49762ef..fcfefff 100644
--- a/core/util/md5.js
+++ b/core/crypto/md5.js
@@ -7,12 +7,15 @@
  */
 
 /*
- * Performs MD5 hashing on a string of binary characters, returns an array of bytes
+ * Performs MD5 hashing on an array of bytes, returns an array of bytes
  */
 
-export function MD5(d) {
-    let r = M(V(Y(X(d), 8 * d.length)));
-    return r;
+export async function MD5(d) {
+    let s = "";
+    for (let i = 0; i < d.length; i++) {
+        s += String.fromCharCode(d[i]);
+    }
+    return M(V(Y(X(s), 8 * s.length)));
 }
 
 function M(d) {
@@ -76,4 +79,4 @@ function add(d, g) {
 
 function rol(d, g) {
     return d << g | d >>> 32 - g;
-}
\ No newline at end of file
+}
diff --git a/core/crypto/rsa.js b/core/crypto/rsa.js
new file mode 100644
index 0000000..68e8e86
--- /dev/null
+++ b/core/crypto/rsa.js
@@ -0,0 +1,132 @@
+import Base64 from "../base64.js";
+import { modPow, bigIntToU8Array, u8ArrayToBigInt } from "./bigint.js";
+
+export class RSACipher {
+    constructor() {
+        this._keyLength = 0;
+        this._keyBytes = 0;
+        this._n = null;
+        this._e = null;
+        this._d = null;
+        this._nBigInt = null;
+        this._eBigInt = null;
+        this._dBigInt = null;
+        this._extractable = false;
+    }
+
+    get algorithm() {
+        return { name: "RSA-PKCS1-v1_5" };
+    }
+
+    _base64urlDecode(data) {
+        data = data.replace(/-/g, "+").replace(/_/g, "/");
+        data = data.padEnd(Math.ceil(data.length / 4) * 4, "=");
+        return Base64.decode(data);
+    }
+
+    _padArray(arr, length) {
+        const res = new Uint8Array(length);
+        res.set(arr, length - arr.length);
+        return res;
+    }
+
+    static async generateKey(algorithm, extractable, _keyUsages) {
+        const cipher = new RSACipher;
+        await cipher._generateKey(algorithm, extractable);
+        return { privateKey: cipher };
+    }
+
+    async _generateKey(algorithm, extractable) {
+        this._keyLength = algorithm.modulusLength;
+        this._keyBytes = Math.ceil(this._keyLength / 8);
+        const key = await window.crypto.subtle.generateKey(
+            {
+                name: "RSA-OAEP",
+                modulusLength: algorithm.modulusLength,
+                publicExponent: algorithm.publicExponent,
+                hash: {name: "SHA-256"},
+            },
+            true, ["encrypt", "decrypt"]);
+        const privateKey = await window.crypto.subtle.exportKey("jwk", key.privateKey);
+        this._n = this._padArray(this._base64urlDecode(privateKey.n), this._keyBytes);
+        this._nBigInt = u8ArrayToBigInt(this._n);
+        this._e = this._padArray(this._base64urlDecode(privateKey.e), this._keyBytes);
+        this._eBigInt = u8ArrayToBigInt(this._e);
+        this._d = this._padArray(this._base64urlDecode(privateKey.d), this._keyBytes);
+        this._dBigInt = u8ArrayToBigInt(this._d);
+        this._extractable = extractable;
+    }
+
+    static async importKey(key, _algorithm, extractable, keyUsages) {
+        if (keyUsages.length !== 1 || keyUsages[0] !== "encrypt") {
+            throw new Error("only support importing RSA public key");
+        }
+        const cipher = new RSACipher;
+        await cipher._importKey(key, extractable);
+        return cipher;
+    }
+
+    async _importKey(key, extractable) {
+        const n = key.n;
+        const e = key.e;
+        if (n.length !== e.length) {
+            throw new Error("the sizes of modulus and public exponent do not match");
+        }
+        this._keyBytes = n.length;
+        this._keyLength = this._keyBytes * 8;
+        this._n = new Uint8Array(this._keyBytes);
+        this._e = new Uint8Array(this._keyBytes);
+        this._n.set(n);
+        this._e.set(e);
+        this._nBigInt = u8ArrayToBigInt(this._n);
+        this._eBigInt = u8ArrayToBigInt(this._e);
+        this._extractable = extractable;
+    }
+
+    async encrypt(_algorithm, message) {
+        if (message.length > this._keyBytes - 11) {
+            return null;
+        }
+        const ps = new Uint8Array(this._keyBytes - message.length - 3);
+        window.crypto.getRandomValues(ps);
+        for (let i = 0; i < ps.length; i++) {
+            ps[i] = Math.floor(ps[i] * 254 / 255 + 1);
+        }
+        const em = new Uint8Array(this._keyBytes);
+        em[1] = 0x02;
+        em.set(ps, 2);
+        em.set(message, ps.length + 3);
+        const emBigInt = u8ArrayToBigInt(em);
+        const c = modPow(emBigInt, this._eBigInt, this._nBigInt);
+        return bigIntToU8Array(c, this._keyBytes);
+    }
+
+    async decrypt(_algorithm, message) {
+        if (message.length !== this._keyBytes) {
+            return null;
+        }
+        const msgBigInt = u8ArrayToBigInt(message);
+        const emBigInt = modPow(msgBigInt, this._dBigInt, this._nBigInt);
+        const em = bigIntToU8Array(emBigInt, this._keyBytes);
+        if (em[0] !== 0x00 || em[1] !== 0x02) {
+            return null;
+        }
+        let i = 2;
+        for (; i < em.length; i++) {
+            if (em[i] === 0x00) {
+                break;
+            }
+        }
+        if (i === em.length) {
+            return null;
+        }
+        return em.slice(i + 1, em.length);
+    }
+
+    async exportKey() {
+        if (!this._extractable) {
+            throw new Error("key is not extractable");
+        }
+        return { n: this._n, e: this._e, d: this._d };
+    }
+}
diff --git a/core/ra2.js b/core/ra2.js
index 81a8a89..647aea2 100644
--- a/core/ra2.js
+++ b/core/ra2.js
@@ -1,146 +1,25 @@
-import Base64 from './base64.js';
 import { encodeUTF8 } from './util/strings.js';
 import EventTargetMixin from './util/eventtarget.js';
+import legacyCrypto from './crypto/crypto.js';
 
-export class AESEAXCipher {
+class RA2Cipher {
     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]);
-    }
-
-    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;
-    }
-
-    async setKey(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", "decrypt"]);
-        await this._initCMAC();
-    }
-
-    async encrypt(message, associatedData, nonce) {
-        const nCMAC = await this._computeCMAC(nonce, this._prefixBlock0);
-        const encrypted = await this._encryptCTR(message, nCMAC);
-        const adCMAC = await this._computeCMAC(associatedData, 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(encrypted, associatedData, nonce, mac) {
-        const nCMAC = await this._computeCMAC(nonce, this._prefixBlock0);
-        const adCMAC = await this._computeCMAC(associatedData, 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;
-    }
-}
-
-export class RA2Cipher {
-    constructor() {
-        this._cipher = new AESEAXCipher();
+        this._cipher = null;
         this._counter = new Uint8Array(16);
     }
 
     async setKey(key) {
-        await this._cipher.setKey(key);
+        this._cipher = await legacyCrypto.importKey(
+            "raw", key, { name: "AES-EAX" }, false, ["encrypt, decrypt"]);
     }
 
     async makeMessage(message) {
         const ad = new Uint8Array([(message.length & 0xff00) >>> 8, message.length & 0xff]);
-        const encrypted = await this._cipher.encrypt(message, ad, this._counter);
+        const encrypted = await legacyCrypto.encrypt({
+            name: "AES-EAX",
+            iv: this._counter,
+            additionalData: ad,
+        }, this._cipher, message);
         for (let i = 0; i < 16 && this._counter[i]++ === 255; i++);
         const res = new Uint8Array(message.length + 2 + 16);
         res.set(ad);
@@ -148,164 +27,18 @@ export class RA2Cipher {
         return res;
     }
 
-    async receiveMessage(length, encrypted, mac) {
+    async receiveMessage(length, encrypted) {
         const ad = new Uint8Array([(length & 0xff00) >>> 8, length & 0xff]);
-        const res = await this._cipher.decrypt(encrypted, ad, this._counter, mac);
+        const res = await legacyCrypto.decrypt({
+            name: "AES-EAX",
+            iv: this._counter,
+            additionalData: ad,
+        }, this._cipher, encrypted);
         for (let i = 0; i < 16 && this._counter[i]++ === 255; i++);
         return res;
     }
 }
 
-export class RSACipher {
-    constructor(keyLength) {
-        this._key = null;
-        this._keyLength = keyLength;
-        this._keyBytes = Math.ceil(keyLength / 8);
-        this._n = null;
-        this._e = null;
-        this._d = null;
-        this._nBigInt = null;
-        this._eBigInt = null;
-        this._dBigInt = null;
-    }
-
-    _base64urlDecode(data) {
-        data = data.replace(/-/g, "+").replace(/_/g, "/");
-        data = data.padEnd(Math.ceil(data.length / 4) * 4, "=");
-        return Base64.decode(data);
-    }
-
-    _u8ArrayToBigInt(arr) {
-        let hex = '0x';
-        for (let i = 0; i < arr.length; i++) {
-            hex += arr[i].toString(16).padStart(2, '0');
-        }
-        return BigInt(hex);
-    }
-
-    _padArray(arr, length) {
-        const res = new Uint8Array(length);
-        res.set(arr, length - arr.length);
-        return res;
-    }
-
-    _bigIntToU8Array(bigint, padLength=0) {
-        let hex = bigint.toString(16);
-        if (padLength === 0) {
-            padLength = Math.ceil(hex.length / 2) * 2;
-        }
-        hex = hex.padStart(padLength * 2, '0');
-        const length = hex.length / 2;
-        const arr = new Uint8Array(length);
-        for (let i = 0; i < length; i++) {
-            arr[i] = parseInt(hex.slice(i * 2, i * 2 + 2), 16);
-        }
-        return arr;
-    }
-
-    _modPow(b, e, m) {
-        if (m === 1n) {
-            return 0;
-        }
-        let r = 1n;
-        b = b % m;
-        while (e > 0) {
-            if (e % 2n === 1n) {
-                r = (r * b) % m;
-            }
-            e = e / 2n;
-            b = (b * b) % m;
-        }
-        return r;
-    }
-
-    async generateKey() {
-        this._key = await window.crypto.subtle.generateKey(
-            {
-                name: "RSA-OAEP",
-                modulusLength: this._keyLength,
-                publicExponent: new Uint8Array([0x01, 0x00, 0x01]),
-                hash: {name: "SHA-256"},
-            },
-            true, ["encrypt", "decrypt"]);
-        const privateKey = await window.crypto.subtle.exportKey("jwk", this._key.privateKey);
-        this._n = this._padArray(this._base64urlDecode(privateKey.n), this._keyBytes);
-        this._nBigInt = this._u8ArrayToBigInt(this._n);
-        this._e = this._padArray(this._base64urlDecode(privateKey.e), this._keyBytes);
-        this._eBigInt = this._u8ArrayToBigInt(this._e);
-        this._d = this._padArray(this._base64urlDecode(privateKey.d), this._keyBytes);
-        this._dBigInt = this._u8ArrayToBigInt(this._d);
-    }
-
-    setPublicKey(n, e) {
-        if (n.length !== this._keyBytes || e.length !== this._keyBytes) {
-            return;
-        }
-        this._n = new Uint8Array(this._keyBytes);
-        this._e = new Uint8Array(this._keyBytes);
-        this._n.set(n);
-        this._e.set(e);
-        this._nBigInt = this._u8ArrayToBigInt(this._n);
-        this._eBigInt = this._u8ArrayToBigInt(this._e);
-    }
-
-    encrypt(message) {
-        if (message.length > this._keyBytes - 11) {
-            return null;
-        }
-        const ps = new Uint8Array(this._keyBytes - message.length - 3);
-        window.crypto.getRandomValues(ps);
-        for (let i = 0; i < ps.length; i++) {
-            ps[i] = Math.floor(ps[i] * 254 / 255 + 1);
-        }
-        const em = new Uint8Array(this._keyBytes);
-        em[1] = 0x02;
-        em.set(ps, 2);
-        em.set(message, ps.length + 3);
-        const emBigInt = this._u8ArrayToBigInt(em);
-        const c = this._modPow(emBigInt, this._eBigInt, this._nBigInt);
-        return this._bigIntToU8Array(c, this._keyBytes);
-    }
-
-    decrypt(message) {
-        if (message.length !== this._keyBytes) {
-            return null;
-        }
-        const msgBigInt = this._u8ArrayToBigInt(message);
-        const emBigInt = this._modPow(msgBigInt, this._dBigInt, this._nBigInt);
-        const em = this._bigIntToU8Array(emBigInt, this._keyBytes);
-        if (em[0] !== 0x00 || em[1] !== 0x02) {
-            return null;
-        }
-        let i = 2;
-        for (; i < em.length; i++) {
-            if (em[i] === 0x00) {
-                break;
-            }
-        }
-        if (i === em.length) {
-            return null;
-        }
-        return em.slice(i + 1, em.length);
-    }
-
-    get keyLength() {
-        return this._keyLength;
-    }
-
-    get n() {
-        return this._n;
-    }
-
-    get e() {
-        return this._e;
-    }
-
-    get d() {
-        return this._d;
-    }
-}
-
 export default class RSAAESAuthenticationState extends EventTargetMixin {
     constructor(sock, getCredentials) {
         super();
@@ -417,8 +150,8 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
         await this._waitSockAsync(serverKeyBytes * 2);
         const serverN = this._sock.rQshiftBytes(serverKeyBytes);
         const serverE = this._sock.rQshiftBytes(serverKeyBytes);
-        const serverRSACipher = new RSACipher(serverKeyLength);
-        serverRSACipher.setPublicKey(serverN, serverE);
+        const serverRSACipher = await legacyCrypto.importKey(
+            "raw", { n: serverN, e: serverE }, { name: "RSA-PKCS1-v1_5" }, false, ["encrypt"]);
         const serverPublickey = new Uint8Array(4 + serverKeyBytes * 2);
         serverPublickey.set(serverKeyLengthBuffer);
         serverPublickey.set(serverN, 4);
@@ -433,10 +166,14 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
         // 2: Send client public key
         const clientKeyLength = 2048;
         const clientKeyBytes = Math.ceil(clientKeyLength / 8);
-        const clientRSACipher = new RSACipher(clientKeyLength);
-        await clientRSACipher.generateKey();
-        const clientN = clientRSACipher.n;
-        const clientE = clientRSACipher.e;
+        const clientRSACipher = (await legacyCrypto.generateKey({
+            name: "RSA-PKCS1-v1_5",
+            modulusLength: clientKeyLength,
+            publicExponent: new Uint8Array([1, 0, 1]),
+        }, true, ["encrypt"])).privateKey;
+        const clientExportedRSAKey = await legacyCrypto.exportKey("raw", clientRSACipher);
+        const clientN = clientExportedRSAKey.n;
+        const clientE = clientExportedRSAKey.e;
         const clientPublicKey = new Uint8Array(4 + clientKeyBytes * 2);
         clientPublicKey[0] = (clientKeyLength & 0xff000000) >>> 24;
         clientPublicKey[1] = (clientKeyLength & 0xff0000) >>> 16;
@@ -449,7 +186,8 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
         // 3: Send client random
         const clientRandom = new Uint8Array(16);
         window.crypto.getRandomValues(clientRandom);
-        const clientEncryptedRandom = serverRSACipher.encrypt(clientRandom);
+        const clientEncryptedRandom = await legacyCrypto.encrypt(
+            { name: "RSA-PKCS1-v1_5" }, serverRSACipher, clientRandom);
         const clientRandomMessage = new Uint8Array(2 + serverKeyBytes);
         clientRandomMessage[0] = (serverKeyBytes & 0xff00) >>> 8;
         clientRandomMessage[1] = serverKeyBytes & 0xff;
@@ -462,7 +200,8 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
             throw new Error("RA2: wrong encrypted message length");
         }
         const serverEncryptedRandom = this._sock.rQshiftBytes(clientKeyBytes);
-        const serverRandom = clientRSACipher.decrypt(serverEncryptedRandom);
+        const serverRandom = await legacyCrypto.decrypt(
+            { name: "RSA-PKCS1-v1_5" }, clientRSACipher, serverEncryptedRandom);
         if (serverRandom === null || serverRandom.length !== 16) {
             throw new Error("RA2: corrupted server encrypted random");
         }
@@ -500,7 +239,7 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
             throw new Error("RA2: wrong server hash");
         }
         const serverHashReceived = await serverCipher.receiveMessage(
-            20, this._sock.rQshiftBytes(20), this._sock.rQshiftBytes(16));
+            20, this._sock.rQshiftBytes(20 + 16));
         if (serverHashReceived === null) {
             throw new Error("RA2: failed to authenticate the message");
         }
@@ -516,7 +255,7 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
             throw new Error("RA2: wrong subtype");
         }
         let subtype = (await serverCipher.receiveMessage(
-            1, this._sock.rQshiftBytes(1), this._sock.rQshiftBytes(16)));
+            1, this._sock.rQshiftBytes(1 + 16)));
         if (subtype === null) {
             throw new Error("RA2: failed to authenticate the message");
         }
@@ -564,4 +303,4 @@ export default class RSAAESAuthenticationState extends EventTargetMixin {
     set hasStarted(s) {
         this._hasStarted = s;
     }
-}
\ No newline at end of file
+}
diff --git a/core/rfb.js b/core/rfb.js
index 6afd7c6..e573cd4 100644
--- a/core/rfb.js
+++ b/core/rfb.js
@@ -21,12 +21,11 @@ import Keyboard from "./input/keyboard.js";
 import GestureHandler from "./input/gesturehandler.js";
 import Cursor from "./util/cursor.js";
 import Websock from "./websock.js";
-import DES from "./des.js";
 import KeyTable from "./input/keysym.js";
 import XtScancode from "./input/xtscancodes.js";
 import { encodings } from "./encodings.js";
 import RSAAESAuthenticationState from "./ra2.js";
-import { MD5 } from "./util/md5.js";
+import legacyCrypto from "./crypto/crypto.js";
 
 import RawDecoder from "./decoders/raw.js";
 import CopyRectDecoder from "./decoders/copyrect.js";
@@ -1681,77 +1680,35 @@ export default class RFB extends EventTargetMixin {
         let prime = this._sock.rQshiftBytes(keyLength);  // predetermined prime modulus
         let serverPublicKey = this._sock.rQshiftBytes(keyLength); // other party's public key
 
-        let clientPrivateKey = window.crypto.getRandomValues(new Uint8Array(keyLength));
-        let padding = Array.from(window.crypto.getRandomValues(new Uint8Array(64)), byte => String.fromCharCode(65+byte%26)).join('');
-
-        this._negotiateARDAuthAsync(generator, keyLength, prime, serverPublicKey, clientPrivateKey, padding);
+        let clientKey = legacyCrypto.generateKey(
+            { name: "DH", g: generator, p: prime }, false, ["deriveBits"]);
+        this._negotiateARDAuthAsync(keyLength, serverPublicKey, clientKey);
 
         return false;
     }
 
-    _modPow(base, exponent, modulus) {
-
-        let baseHex = "0x"+Array.from(base, byte => ('0' + (byte & 0xFF).toString(16)).slice(-2)).join('');
-        let exponentHex = "0x"+Array.from(exponent, byte => ('0' + (byte & 0xFF).toString(16)).slice(-2)).join('');
-        let modulusHex = "0x"+Array.from(modulus, byte => ('0' + (byte & 0xFF).toString(16)).slice(-2)).join('');
-
-        let b = BigInt(baseHex);
-        let e = BigInt(exponentHex);
-        let m = BigInt(modulusHex);
-        let r = 1n;
-        b = b % m;
-        while (e > 0) {
-            if (e % 2n === 1n) {
-                r = (r * b) % m;
-            }
-            e = e / 2n;
-            b = (b * b) % m;
-        }
-        let hexResult = r.toString(16);
-
-        while (hexResult.length/2<exponent.length || (hexResult.length%2 != 0)) {
-            hexResult = "0"+hexResult;
-        }
+    async _negotiateARDAuthAsync(keyLength, serverPublicKey, clientKey) {
+        const clientPublicKey = legacyCrypto.exportKey("raw", clientKey.publicKey);
+        const sharedKey = legacyCrypto.deriveBits(
+            { name: "DH", public: serverPublicKey }, clientKey.privateKey, keyLength * 8);
 
-        let bytesResult = [];
-        for (let c = 0; c < hexResult.length; c += 2) {
-            bytesResult.push(parseInt(hexResult.substr(c, 2), 16));
-        }
-        return bytesResult;
-    }
+        const username = encodeUTF8(this._rfbCredentials.username).substring(0, 63);
+        const password = encodeUTF8(this._rfbCredentials.password).substring(0, 63);
 
-    async _aesEcbEncrypt(string, key) {
-        // perform AES-ECB blocks
-        let keyString = Array.from(key, byte => String.fromCharCode(byte)).join('');
-        let aesKey = await window.crypto.subtle.importKey("raw", MD5(keyString), {name: "AES-CBC"}, false, ["encrypt"]);
-        let data = new Uint8Array(string.length);
-        for (let i = 0; i < string.length; ++i) {
-            data[i] = string.charCodeAt(i);
+        const credentials = window.crypto.getRandomValues(new Uint8Array(128));
+        for (let i = 0; i < username.length; i++) {
+            credentials[i] = username.charCodeAt(i);
         }
-        let encrypted = new Uint8Array(data.length);
-        for (let i=0;i<data.length;i+=16) {
-            let block = data.slice(i, i+16);
-            let encryptedBlock = await window.crypto.subtle.encrypt({name: "AES-CBC", iv: block},
-                                                                    aesKey, new Uint8Array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0])
-            );
-            encrypted.set((new Uint8Array(encryptedBlock)).slice(0, 16), i);
+        credentials[username.length] = 0;
+        for (let i = 0; i < password.length; i++) {
+            credentials[64 + i] = password.charCodeAt(i);
         }
-        return encrypted;
-    }
-
-    async _negotiateARDAuthAsync(generator, keyLength, prime, serverPublicKey, clientPrivateKey, padding) {
-        // calculate the DH keys
-        let clientPublicKey = this._modPow(generator, clientPrivateKey, prime);
-        let sharedKey = this._modPow(serverPublicKey, clientPrivateKey, prime);
-
-        let username = encodeUTF8(this._rfbCredentials.username).substring(0, 63);
-        let password = encodeUTF8(this._rfbCredentials.password).substring(0, 63);
+        credentials[64 + password.length] = 0;
 
-        let paddedUsername = username + '\0' + padding.substring(0, 63);
-        let paddedPassword = password + '\0' + padding.substring(0, 63);
-        let credentials = paddedUsername.substring(0, 64) + paddedPassword.substring(0, 64);
-
-        let encrypted = await this._aesEcbEncrypt(credentials, sharedKey);
+        const key = await legacyCrypto.digest("MD5", sharedKey);
+        const cipher = await legacyCrypto.importKey(
+            "raw", key, { name: "AES-ECB" }, false, ["encrypt"]);
+        const encrypted = await legacyCrypto.encrypt({ name: "AES-ECB" }, cipher, credentials);
 
         this._rfbCredentials.ardCredentials = encrypted;
         this._rfbCredentials.ardPublicKey = clientPublicKey;
@@ -1905,7 +1862,8 @@ export default class RFB extends EventTargetMixin {
                     if (e.message !== "disconnect normally") {
                         this._fail(e.message);
                     }
-                }).then(() => {
+                })
+                .then(() => {
                     this.dispatchEvent(new CustomEvent('securityresult'));
                     this._rfbInitState = "SecurityResult";
                     return true;
@@ -1934,15 +1892,15 @@ export default class RFB extends EventTargetMixin {
         const g = this._sock.rQshiftBytes(8);
         const p = this._sock.rQshiftBytes(8);
         const A = this._sock.rQshiftBytes(8);
-        const b = window.crypto.getRandomValues(new Uint8Array(8));
-        const B = new Uint8Array(this._modPow(g, b, p));
-        const secret = new Uint8Array(this._modPow(A, b, p));
+        const dhKey = legacyCrypto.generateKey({ name: "DH", g: g, p: p }, true, ["deriveBits"]);
+        const B = legacyCrypto.exportKey("raw", dhKey.publicKey);
+        const secret = legacyCrypto.deriveBits({ name: "DH", public: A }, dhKey.privateKey, 64);
 
-        const des = new DES(secret);
+        const key = legacyCrypto.importKey("raw", secret, { name: "DES-CBC" }, false, ["encrypt"]);
         const username = encodeUTF8(this._rfbCredentials.username).substring(0, 255);
         const password = encodeUTF8(this._rfbCredentials.password).substring(0, 63);
-        const usernameBytes = new Uint8Array(256);
-        const passwordBytes = new Uint8Array(64);
+        let usernameBytes = new Uint8Array(256);
+        let passwordBytes = new Uint8Array(64);
         window.crypto.getRandomValues(usernameBytes);
         window.crypto.getRandomValues(passwordBytes);
         for (let i = 0; i < username.length; i++) {
@@ -1953,22 +1911,8 @@ export default class RFB extends EventTargetMixin {
             passwordBytes[i] = password.charCodeAt(i);
         }
         passwordBytes[password.length] = 0;
-        let x = new Uint8Array(secret);
-        for (let i = 0; i < 32; i++) {
-            for (let j = 0; j < 8; j++) {
-                x[j] ^= usernameBytes[i * 8 + j];
-            }
-            x = des.enc8(x);
-            usernameBytes.set(x, i * 8);
-        }
-        x = new Uint8Array(secret);
-        for (let i = 0; i < 8; i++) {
-            for (let j = 0; j < 8; j++) {
-                x[j] ^= passwordBytes[i * 8 + j];
-            }
-            x = des.enc8(x);
-            passwordBytes.set(x, i * 8);
-        }
+        usernameBytes = legacyCrypto.encrypt({ name: "DES-CBC", iv: secret }, key, usernameBytes);
+        passwordBytes = legacyCrypto.encrypt({ name: "DES-CBC", iv: secret }, key, passwordBytes);
         this._sock.send(B);
         this._sock.send(usernameBytes);
         this._sock.send(passwordBytes);
@@ -2937,7 +2881,9 @@ export default class RFB extends EventTargetMixin {
 
     static genDES(password, challenge) {
         const passwordChars = password.split('').map(c => c.charCodeAt(0));
-        return (new DES(passwordChars)).encrypt(challenge);
+        const key = legacyCrypto.importKey(
+            "raw", passwordChars, { name: "DES-ECB" }, false, ["encrypt"]);
+        return legacyCrypto.encrypt({ name: "DES-ECB" }, key, challenge);
     }
 }
 
diff --git a/tests/test.rfb.js b/tests/test.rfb.js
index 2da3818..4262ee6 100644
--- a/tests/test.rfb.js
+++ b/tests/test.rfb.js
@@ -8,6 +8,7 @@ import { encodings } from '../core/encodings.js';
 import { toUnsigned32bit } from '../core/util/int.js';
 import { encodeUTF8 } from '../core/util/strings.js';
 import KeyTable from '../core/input/keysym.js';
+import legacyCrypto from '../core/crypto/crypto.js';
 
 import FakeWebSocket from './fake.websocket.js';
 
@@ -1270,6 +1271,19 @@ describe('Remote Frame Buffer Protocol Client', function () {
             });
 
             describe('ARD Authentication (type 30) Handler', function () {
+                let byteArray = new Uint8Array(Array.from(new Uint8Array(128).keys()));
+                function fakeGetRandomValues(arr) {
+                    if (arr.length == 128) {
+                        arr.set(byteArray);
+                    }
+                    return arr;
+                }
+                before(() => {
+                    sinon.stub(window.crypto, "getRandomValues").callsFake(fakeGetRandomValues);
+                });
+                after(() => {
+                    window.crypto.getRandomValues.restore();
+                });
                 it('should fire the credentialsrequired event if all credentials are missing', function () {
                     const spy = sinon.spy();
                     client.addEventListener("credentialsrequired", spy);
@@ -1298,35 +1312,30 @@ describe('Remote Frame Buffer Protocol Client', function () {
 
                     expect(client._sock).to.have.sent([30]);
 
-                    function byteArray(length) {
-                        return Array.from(new Uint8Array(length).keys());
-                    }
-
-                    let generator = [127, 255];
-                    let prime = byteArray(128);
-                    let serverPrivateKey = byteArray(128);
-                    let serverPublicKey = client._modPow(generator, serverPrivateKey, prime);
-
-                    let clientPrivateKey = byteArray(128);
-                    let clientPublicKey = client._modPow(generator, clientPrivateKey, prime);
-
-                    let padding = Array.from(byteArray(64), byte => String.fromCharCode(65+byte%26)).join('');
+                    const generator = new Uint8Array([127, 255]);
+                    const prime = new Uint8Array(byteArray);
+                    const serverKey = legacyCrypto.generateKey(
+                        { name: "DH", g: generator, p: prime }, false, ["deriveBits"]);
+                    const clientKey = legacyCrypto.generateKey(
+                        { name: "DH", g: generator, p: prime }, false, ["deriveBits"]);
+                    const serverPublicKey = legacyCrypto.exportKey("raw", serverKey.publicKey);
+                    const clientPublicKey = legacyCrypto.exportKey("raw", clientKey.publicKey);
 
-                    await client._negotiateARDAuthAsync(generator, 128, prime, serverPublicKey, clientPrivateKey, padding);
+                    await client._negotiateARDAuthAsync(128, serverPublicKey, clientKey);
 
                     client._negotiateARDAuth();
 
                     expect(client._rfbInitState).to.equal('SecurityResult');
 
                     let expectEncrypted = new Uint8Array([
-                        232, 234, 159, 162, 170, 180, 138, 104, 164, 49, 53, 96, 20, 36, 21, 15,
-                        217, 219, 107, 173, 196, 60, 96, 142, 215, 71, 13, 185, 185, 47, 5, 175,
-                        151, 30, 194, 55, 173, 214, 141, 161, 36, 138, 146, 3, 178, 89, 43, 248,
-                        131, 134, 205, 174, 9, 150, 171, 74, 222, 201, 20, 2, 30, 168, 162, 123,
-                        46, 86, 81, 221, 44, 211, 180, 247, 221, 61, 95, 155, 157, 241, 76, 76,
-                        49, 217, 234, 75, 147, 237, 199, 159, 93, 140, 191, 174, 52, 90, 133, 58,
-                        243, 81, 112, 182, 64, 62, 149, 7, 151, 28, 36, 161, 247, 247, 36, 96,
-                        230, 95, 58, 207, 46, 183, 100, 139, 143, 155, 224, 43, 219, 3, 71, 139]);
+                        199, 39, 204, 95, 190, 70, 127, 66, 5, 106, 153, 228, 123, 236, 150, 206,
+                        62, 107, 11, 4, 21, 242, 92, 184, 9, 81, 35, 125, 56, 167, 1, 215,
+                        182, 145, 183, 75, 245, 197, 47, 19, 122, 94, 64, 76, 77, 163, 222, 143,
+                        186, 174, 84, 39, 244, 179, 227, 114, 83, 231, 42, 106, 205, 43, 159, 110,
+                        209, 240, 157, 246, 237, 206, 134, 153, 195, 112, 92, 60, 28, 234, 91, 66,
+                        131, 38, 187, 195, 110, 167, 212, 241, 32, 250, 212, 213, 202, 89, 180, 21,
+                        71, 217, 209, 81, 42, 61, 118, 248, 65, 123, 98, 78, 139, 111, 202, 137,
+                        50, 185, 37, 173, 58, 99, 187, 53, 42, 125, 13, 165, 232, 163, 151, 42, 0]);
 
                     let output = new Uint8Array(256);
                     output.set(expectEncrypted, 0);