@zlattice/lattice-js
Version:
Lattice blockchain TypeScript SDK with dual module support (CJS + ESM)
67 lines • 2.64 kB
JavaScript
import { hmac } from '../../crypto/sm2/hmac.js';
import { sm3 as sm2sm3 } from '../../crypto/sm2/sm3.js';
import { hexToArray } from '../../crypto/sm2/utils.js';
import { bytesToHex } from '../../crypto/sm3/utils.js';
/**
* 补全16进制字符串
*/
// function leftPad(input, num) {
// if (input.length >= num) return input
// return (new Array(num - input.length + 1)).join('0') + input
// }
/**
* utf8 串转字节数组
*/
export function utf8ToArray(str) {
const arr = [];
for (let i = 0, len = str.length; i < len; i++) {
const point = str.codePointAt(i);
if (!point)
throw new Error('invalid input');
if (point <= 0x007f) {
// 单字节，标量值：00000000 00000000 0zzzzzzz
arr.push(point);
}
else if (point <= 0x07ff) {
// 双字节，标量值：00000000 00000yyy yyzzzzzz
arr.push(0xc0 | (point >>> 6)); // 110yyyyy（0xc0-0xdf）
arr.push(0x80 | (point & 0x3f)); // 10zzzzzz（0x80-0xbf）
}
else if (point <= 0xD7FF || (point >= 0xE000 && point <= 0xFFFF)) {
// 三字节：标量值：00000000 xxxxyyyy yyzzzzzz
arr.push(0xe0 | (point >>> 12)); // 1110xxxx（0xe0-0xef）
arr.push(0x80 | ((point >>> 6) & 0x3f)); // 10yyyyyy（0x80-0xbf）
arr.push(0x80 | (point & 0x3f)); // 10zzzzzz（0x80-0xbf）
}
else if (point >= 0x010000 && point <= 0x10FFFF) {
// 四字节：标量值：000wwwxx xxxxyyyy yyzzzzzz
i++;
arr.push((0xf0 | (point >>> 18) & 0x1c)); // 11110www（0xf0-0xf7）
arr.push((0x80 | ((point >>> 12) & 0x3f))); // 10xxxxxx（0x80-0xbf）
arr.push((0x80 | ((point >>> 6) & 0x3f))); // 10yyyyyy（0x80-0xbf）
arr.push((0x80 | (point & 0x3f))); // 10zzzzzz（0x80-0xbf）
}
else {
// 五、六字节，暂时不支持
arr.push(point);
throw new Error('input is not supported');
}
}
return new Uint8Array(arr);
}
export function sm3(input, options) {
input = typeof input === 'string' ? utf8ToArray(input) : input;
if (options) {
const mode = options.mode || 'hmac';
if (mode !== 'hmac')
throw new Error('invalid mode');
let key = options.key;
if (!key)
throw new Error('invalid key');
key = typeof key === 'string' ? hexToArray(key) : key;
return bytesToHex(hmac(sm2sm3, key, input));
}
return bytesToHex(sm2sm3(input));
}
export default sm3;
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