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import { type MaybeRef, get } from '@vueuse/core';
import QRCode, { type QRCodeToDataURLOptions } from 'qrcode';
import { isRef, ref, watch } from 'vue';
export const wifiEncryptions = ['WEP', 'WPA', 'nopass', 'WPA2-EAP'] as const;
export type WifiEncryption = typeof wifiEncryptions[number];
// @see https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol
// for a list of available EAP methods. There are a lot (40!) of them.
export const EAPMethods = [
'MD5',
'POTP',
'GTC',
'TLS',
'IKEv2',
'SIM',
'AKA',
'AKA\'',
'TTLS',
'PWD',
'LEAP',
'PSK',
'FAST',
'TEAP',
'EKE',
'NOOB',
'PEAP',
] as const;
export type EAPMethod = typeof EAPMethods[number];
export const EAPPhase2Methods = [
'None',
'MSCHAPV2',
] as const;
export type EAPPhase2Method = typeof EAPPhase2Methods[number];
interface IWifiQRCodeOptions {
ssid: MaybeRef<string>
password: MaybeRef<string>
eapMethod: MaybeRef<EAPMethod>
isHiddenSSID: MaybeRef<boolean>
eapAnonymous: MaybeRef<boolean>
eapIdentity: MaybeRef<string>
eapPhase2Method: MaybeRef<EAPPhase2Method>
color: { foreground: MaybeRef<string>; background: MaybeRef<string> }
options?: QRCodeToDataURLOptions
}
interface GetQrCodeTextOptions {
ssid: string
password: string
encryption: WifiEncryption
eapMethod: EAPMethod
isHiddenSSID: boolean
eapAnonymous: boolean
eapIdentity: string
eapPhase2Method: EAPPhase2Method
}
function escapeString(str: string) {
// replaces \, ;, ,, " and : with the same character preceded by a backslash
return str.replace(/([\\;,:"])/g, '\\$1');
}
function getQrCodeText(options: GetQrCodeTextOptions): string | null {
const { ssid, password, encryption, eapMethod, isHiddenSSID, eapAnonymous, eapIdentity, eapPhase2Method } = options;
if (!ssid) {
return null;
}
if (encryption === 'nopass') {
return `WIFI:S:${escapeString(ssid)};;`; // type can be omitted in that case, and password is not needed, makes the QR Code smaller
}
if (encryption !== 'WPA2-EAP' && password) {
// EAP has a lot of options, so we'll handle it separately
// WPA and WEP are pretty simple though.
return `WIFI:S:${escapeString(ssid)};T:${encryption};P:${escapeString(password)};${isHiddenSSID ? 'H:true' : ''};`;
}
if (encryption === 'WPA2-EAP' && password && eapMethod) {
// WPA2-EAP string is a lot more complex, first off, we drop the text if there is no identity, and it's not anonymous.
if (!eapIdentity && !eapAnonymous) {
return null;
}
// From reading, I could only find that a phase 2 is required for the PEAP method, I may be wrong though, I didn't read the whole spec.
if (eapMethod === 'PEAP' && !eapPhase2Method) {
return null;
}
// The string is built in the following order:
// 1. SSID
// 2. Authentication type
// 3. Password
// 4. EAP method
// 5. EAP phase 2 method
// 6. Identity or anonymous if checked
// 7. Hidden SSID if checked
const identity = eapAnonymous ? 'A:anon' : `I:${escapeString(eapIdentity)}`;
const phase2 = eapPhase2Method !== 'None' ? `PH2:${eapPhase2Method};` : '';
return `WIFI:S:${escapeString(ssid)};T:WPA2-EAP;P:${escapeString(password)};E:${eapMethod};${phase2}${identity};${isHiddenSSID ? 'H:true' : ''};`;
}
return null;
}
export function useWifiQRCode({
ssid,
password,
eapMethod,
isHiddenSSID,
eapAnonymous,
eapIdentity,
eapPhase2Method,
color: { background, foreground },
options,
}: IWifiQRCodeOptions) {
const qrcode = ref('');
const encryption = ref<WifiEncryption>('WPA');
watch(
[ssid, password, encryption, eapMethod, isHiddenSSID, eapAnonymous, eapIdentity, eapPhase2Method, background, foreground].filter(isRef),
async () => {
// @see https://github.com/zxing/zxing/wiki/Barcode-Contents#wi-fi-network-config-android-ios-11
// This is the full spec, there's quite a bit of logic to generate the string embeddedin the QR code.
const text = getQrCodeText({
ssid: get(ssid),
password: get(password),
encryption: get(encryption),
eapMethod: get(eapMethod),
isHiddenSSID: get(isHiddenSSID),
eapAnonymous: get(eapAnonymous),
eapIdentity: get(eapIdentity),
eapPhase2Method: get(eapPhase2Method),
});
if (text) {
qrcode.value = await QRCode.toDataURL(get(text).trim(), {
color: {
dark: get(foreground),
light: get(background),
...options?.color,
},
errorCorrectionLevel: 'M',
...options,
});
}
},
{ immediate: true },
);
return { qrcode, encryption };
}
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