Ivan Fontosh
57 lines
2.0 KiB
TypeScript
57 lines
2.0 KiB
TypeScript
/** Убирает переносы/неразрывные пробелы из вставки из почты и мессенджеров (иначе `malformed`). */
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export function normalizeLicenseTokenInput(token: string): string {
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return token.replace(/[\s\u00a0\u200b-\u200d\ufeff\u2028\u2029]+/gu, '').trim();
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}
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const B64URL = {
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encode(bytes: Uint8Array): string {
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if (typeof Buffer !== 'undefined') {
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return Buffer.from(bytes.buffer, bytes.byteOffset, bytes.byteLength).toString('base64url');
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}
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let bin = '';
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for (const byte of bytes) {
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bin += String.fromCharCode(byte);
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}
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const b64 = btoa(bin);
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return b64.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/u, '');
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},
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decode(s: string): Uint8Array {
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if (typeof Buffer !== 'undefined') {
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try {
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return new Uint8Array(Buffer.from(s, 'base64url'));
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} catch {
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/* fall through */
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}
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}
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const pad = s.length % 4 === 0 ? '' : '='.repeat(4 - (s.length % 4));
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const b64 = s.replace(/-/g, '+').replace(/_/g, '/') + pad;
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const bin = atob(b64);
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const out = new Uint8Array(bin.length);
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for (let i = 0; i < bin.length; i++) out[i] = bin.charCodeAt(i) & 0xff;
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return out;
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},
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};
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/** Тело UTF-8 + подпись Ed25519 (64 байта), разделитель «.». */
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export function splitSignedLicenseToken(token: string): { bodyUtf8: string; signature: Uint8Array } | null {
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const t = normalizeLicenseTokenInput(token);
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const dot = t.indexOf('.');
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if (dot <= 0) return null;
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const a = t.slice(0, dot);
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const b = t.slice(dot + 1);
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if (!a || !b) return null;
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try {
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const bodyBytes = B64URL.decode(a);
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const sigBytes = B64URL.decode(b);
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const bodyUtf8 = new TextDecoder().decode(bodyBytes);
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return { bodyUtf8, signature: sigBytes };
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} catch {
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return null;
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}
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}
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export function joinSignedLicenseToken(bodyUtf8: string, signature: Uint8Array): string {
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const bodyBytes = new TextEncoder().encode(bodyUtf8);
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return `${B64URL.encode(bodyBytes)}.${B64URL.encode(signature)}`;
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}
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