node-ciphers/dist/aes/gcm.cjs

Lightweight AES and DES encryption library for Node.js, featuring flexible encoding, multiple cipher modes, and TypeScript support.

'use strict';

const node_crypto = require('node:crypto');
const index = require('./base/index.cjs');

class Gcm extends index.BaseAesCipher {
    #ivLength;
    constructor(key, encodingOptions, ivLength = 12) {
        super(key, 'gcm', encodingOptions);
        this.#ivLength = ivLength;
    }
    decrypt(encryptedData, iv, authTag, authTagLength, encodingOptions, decipherOptions) {
        try {
            const decipher = this.createDecipher(this.dataToBuffer(iv, encodingOptions?.iv || this.encodingOptions.iv), {
                authTagLength,
                ...decipherOptions,
            });
            decipher.setAuthTag(this.dataToBuffer(authTag, encodingOptions?.authTag || this.encodingOptions.authTag));
            return this.createOkResult(this.getDecipherResult(decipher, encryptedData, encodingOptions));
        }
        catch (error) {
            return this.createErrorResult(error);
        }
    }
    decryptToJson(encryptedData, iv, authTag, authTagLength, encodingOptions, decipherOptions) {
        const result = this.decrypt(encryptedData, iv, authTag, authTagLength, encodingOptions, decipherOptions);
        if (!result.ok)
            return result;
        return this.parseJson(result.value);
    }
    encrypt(data, authTagLength, ivLength = this.#ivLength, encodingOptions, cipherOptions) {
        const iv = node_crypto.randomBytes(ivLength);
        try {
            const cipher = this.createCipher(iv, {
                authTagLength,
                ...cipherOptions,
            });
            const encryptedData = this.getCipherResult(cipher, data, encodingOptions);
            return this.createOkResult({
                authTag: cipher.getAuthTag().toString(encodingOptions?.authTag || this.encodingOptions.authTag),
                authTagLength,
                data: encryptedData,
                iv: iv.toString(encodingOptions?.iv || this.encodingOptions.iv),
            });
        }
        catch (error) {
            return this.createErrorResult(error);
        }
    }
    encryptJson(data, authTagLength, ivLength = this.#ivLength, encodingOptions, cipherOptions) {
        try {
            return this.encrypt(JSON.stringify(data), authTagLength, ivLength, encodingOptions, cipherOptions);
        }
        catch (error) {
            return this.createErrorResult(error);
        }
    }
}

exports.Gcm = Gcm;
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