58 lines
1.4 KiB
TypeScript
58 lines
1.4 KiB
TypeScript
// @ts-check
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import { scryptSync, createDecipheriv } from "crypto";
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import { Buffer } from "buffer";
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import grabKeys from "../../utils/grab-keys";
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type Param = {
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encryptedString: string;
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encryptionKey?: string;
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encryptionSalt?: string;
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};
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/**
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* # Decrypt Function
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*/
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export default function decrypt({
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encryptedString,
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encryptionKey,
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encryptionSalt,
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}: Param) {
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if (!encryptedString?.match(/./)) {
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console.log("Encrypted string is invalid");
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return encryptedString;
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}
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const {
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key: encrptKey,
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salt,
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keyLen,
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algorithm,
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bufferAllocSize,
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} = grabKeys({ encryptionKey });
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if (!encrptKey?.match(/.{8,}/)) {
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console.log("Decrption key is invalid");
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return encryptedString;
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}
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if (!salt?.match(/.{8,}/)) {
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console.log("Decrption salt is invalid");
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return encryptedString;
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}
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let key = scryptSync(encrptKey, salt, keyLen);
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let iv = Buffer.alloc(bufferAllocSize, 0);
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const decipher = createDecipheriv(algorithm, key, iv);
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try {
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let decrypted = decipher.update(encryptedString, "hex", "utf8");
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decrypted += decipher.final("utf8");
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return decrypted;
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} catch (error: any) {
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console.log("Error in decrypting =>", error.message);
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return encryptedString;
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}
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}
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