wehub-resource-sync
48 lines
1.5 KiB
TypeScript
48 lines
1.5 KiB
TypeScript
import CryptoJS from "crypto-js";
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export interface DecryptedHash {
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contentHash: string;
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uid?: string; // address (if logged in) or deviceId (if not logged in)
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version: number; // 1 if old version (no '-' separator), 2 if new version (contentHash-uid)
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}
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export const decryptHash = (encryptedHash: string | undefined, key: string): DecryptedHash | null => {
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try {
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if (!encryptedHash) {
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return null;
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}
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let base64 = encryptedHash.replace(/-/g, "+").replace(/_/g, "/");
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while (base64.length % 4) {
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base64 += "=";
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}
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const decrypted = CryptoJS.RC4.decrypt(base64, key);
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const decryptedStr = decrypted.toString(CryptoJS.enc.Utf8);
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// Check if it contains '-' separator (new version: contentHash-uid)
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const dashIndex = decryptedStr.indexOf('-');
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if (dashIndex > 0 && dashIndex < decryptedStr.length - 1) {
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// New version: split into contentHash and uid (address or deviceId)
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const contentHash = decryptedStr.slice(0, dashIndex);
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const uid = decryptedStr.slice(dashIndex + 1);
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return {
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contentHash,
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uid,
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version: 2,
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};
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} else {
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// Legacy version: only contentHash, no separator
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return {
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contentHash: decryptedStr,
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version: 1,
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};
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}
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} catch (error: any) {
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console.error(`Decryption error: ${error.message}`);
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// Return as legacy format if decryption fails
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return encryptedHash ? {
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contentHash: encryptedHash,
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version: 1,
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} : null;
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}
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};
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