20 lines
577 B
JavaScript
20 lines
577 B
JavaScript
'use strict';
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const crypto = require('crypto');
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/** 空值不参与，字典序，MD5 小写 */
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function buildSign(params, secretKey) {
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const keys = Object.keys(params).filter((k) => k !== 'Sign').sort();
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const parts = [];
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for (const k of keys) {
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const v = params[k];
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if (v === null || v === undefined) continue;
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const s = String(v);
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if (s === '') continue;
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parts.push(`${k}=${s}`);
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}
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const raw = parts.join('&') + `&SecretKey=${secretKey}`;
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return crypto.createHash('md5').update(raw, 'utf8').digest('hex');
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}
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module.exports = { buildSign };
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