41 lines
1.2 KiB
TypeScript
41 lines
1.2 KiB
TypeScript
import * as plugins from './smartstring.plugins';
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const algorithm = 'aes-256-ctr';
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export class Cryptr {
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private key: Buffer;
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constructor(secret) {
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if (!secret || typeof secret !== 'string') {
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throw new Error('Cryptr: secret must be a non-0-length string');
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}
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this.key = plugins.crypto.createHash('sha256').update(String(secret)).digest();
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}
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encrypt(value: string) {
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if (value == null) {
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throw new Error('value must not be null or undefined');
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}
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const iv = plugins.crypto.randomBytes(16);
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const cipher = plugins.crypto.createCipheriv(algorithm, this.key, iv);
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const encrypted = cipher.update(String(value), 'utf8', 'hex') + cipher.final('hex');
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return iv.toString('hex') + encrypted;
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}
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decrypt(value: string) {
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if (value == null) {
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throw new Error('value must not be null or undefined');
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}
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const stringValue = String(value);
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const iv = Buffer.from(stringValue.slice(0, 32), 'hex');
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const encrypted = stringValue.slice(32);
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const decipher = plugins.crypto.createDecipheriv(algorithm, this.key, iv);
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return decipher.update(encrypted, 'hex', 'utf8') + decipher.final('utf8');
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}
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}
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