45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
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const crypto = require(`crypto`);
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class simple_encryption {
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/**
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* Create an encryption class to encrypt/decrypt data.
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* @param {string} password The key to use for the encryption.
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* @param {string} [algorithm] The algorithm to use for the encryption.
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*/
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constructor(password, algorithm = 'aes-256-cbc') {
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this.key = crypto.createHash("sha256").update(password).digest();
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this.algorithm = algorithm;
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}
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/**
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* Encrypt data.
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* @param {any} unencrypted_data - Input data to encrypt. This data will automatically be converted into a string.
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* @param {string} [iv] - The IV string.
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* @returns {Object} - Encrypted data
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*/
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async encrypt(unencrypted_data, iv) {
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const initialization_vector = iv || create_iv();
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unencrypted_data = JSON.stringify(unencrypted_data); // Turn the data into a string
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let cipher = crypto.createCipheriv(this.algorithm, this.key, initialization_vector);
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let encrypted_data = cipher.update(unencrypted_data, 'utf-8', 'hex');
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encrypted_data += cipher.final('hex');
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return { encrypted: true, iv: initialization_vector, contents: encrypted_data };
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}
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/**
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* Decrypt data.
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* @param {string} encrypted_data - Input encrypted data to decrypt.
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* @returns {string} - Unencrypted data
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*/
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async decrypt(encrypted_data) {
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let cipher = crypto.createDecipheriv(this.algorithm, this.key, encrypted_data.iv);
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let decrypted_data = cipher.update(encrypted_data.contents, 'hex', 'utf-8');
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decrypted_data += cipher.final('utf-8');
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return decrypted_data;
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}
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}
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function create_iv() {
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return crypto.randomBytes(8).toString('hex');
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};
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module.exports = { create_iv, simple_encryption };
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