55 lines
1.7 KiB
JavaScript
55 lines
1.7 KiB
JavaScript
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// @ts-check
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const { scryptSync, createDecipheriv } = require("crypto");
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const { Buffer } = require("buffer");
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/**
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* @param {object} param0
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* @param {string} param0.encryptedString
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* @param {string} [param0.encryptionKey]
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* @param {string} [param0.encryptionSalt]
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* @returns
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*/
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const decrypt = ({ encryptedString, encryptionKey, encryptionSalt }) => {
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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 finalEncryptionKey =
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encryptionKey || process.env.DSQL_ENCRYPTION_PASSWORD;
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const finalEncryptionSalt =
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encryptionSalt || process.env.DSQL_ENCRYPTION_SALT;
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const finalKeyLen = process.env.DSQL_ENCRYPTION_KEY_LENGTH
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? Number(process.env.DSQL_ENCRYPTION_KEY_LENGTH)
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: 24;
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if (!finalEncryptionKey?.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 (!finalEncryptionSalt?.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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const algorithm = "aes-192-cbc";
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let key = scryptSync(finalEncryptionKey, finalEncryptionSalt, finalKeyLen);
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let iv = Buffer.alloc(16, 0);
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// @ts-ignore
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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 (/** @type {*} */ error) {
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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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module.exports = decrypt;
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