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38 lines
982 B
38 lines
982 B
5 months ago
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import CryptoJS from 'crypto-js';
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import { sm4 } from 'sm-crypto';
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import { BaseSymmetricEncryption } from '../base';
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/**
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* SM4 实现
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*/
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export class Sm4Encryption extends BaseSymmetricEncryption {
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override decrypt(data: string, key: string): string {
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this.checkKey(key);
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const keyHex = CryptoJS.enc.Hex.stringify(CryptoJS.enc.Utf8.parse(key));
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return sm4.decrypt(data, keyHex);
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}
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override encrypt(data: string, key: string): string {
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this.checkKey(key);
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/**
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* 转hex字符串
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* encrypt方法的key需要为`16进制字符串`而非`原始字符串`
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* 比如字符串ab a为0x61 b为0x62 转字符串为 6162
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*/
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const keyHex = CryptoJS.enc.Hex.stringify(CryptoJS.enc.Utf8.parse(key));
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return sm4.encrypt(data, keyHex);
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}
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/**
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* key长度只能为16位字符串
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* @param key key
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*/
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private checkKey(key: string) {
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if (key.length !== 16) {
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throw new Error('SM4 key must be 16 bytes');
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}
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}
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}
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