2022.01.14 14:05:33

    The signature generation method is as follows:

    • Sort all request parameters (excluding signature parameter) in ascending order of parameter name ASCII code table. For example: foo=1, bar=2, foo_bar=3, baz=4 The sorted order is bar=2, baz=4, foo=1, foobar=3.

    • Construct the sorted parameter names and parameter values ​​into strings in the format: key1+value1+key2+value2… . The result of the construction according to the above example is: bar2baz4foo1foobar3.

    • Select the secretKey paired with secretId and add it to the parameter string constructed in the previous step, such as secretKey=6308afb129ea00301bd7c79621d07591, then the final parameter string is bar2baz4foo1foobar36308afb129ea00301bd7c79621d07591.

    • Encode the string assembled in the previous step in utf-8, use the MD5 algorithm to digest the string, calculate the signature parameter value (lowercase), and add it to the interface request parameter. MD5 is a digest algorithm with a length of 128 bits, expressed in hexadecimal, and a hexadecimal character can represent 4 units, so the length of the signed string is fixed to 32 hexadecimal characters.

    Signature generation sample code:

    import java.nio.charset.StandardCharsets;
    import java.util.Arrays;
    import java.util.Map;
    // Note: You can choose appropriate auxiliary tools according to the actual situation of your project.
    // depend Apache Commons Codec(commons-codec: commons-codec)
    import org.apache.commons.codec.digest.DigestUtils;
    // depend Apache Commons Lang(org.apache.commons: commons-lang3)
    import org.apache.commons.lang3.ObjectUtils;
    import org.apache.commons.lang3.StringUtils;
     * Generate signature information
     * @param secretKey	Product private key
     * @param params Interface request parameter name and parameter value map, excluding signature parameter name
    public static String genSignature(String secretKey, Map<String, String> params) {
        String[] paramNames = params.keySet().toArray(new String[0]);
        StringBuilder sb = new StringBuilder();
        for (String name : paramNames) {
            String value = ObjectUtils.defaultIfNull(params.get(name), StringUtils.EMPTY);
        return DigestUtils.md5Hex(sb.toString().getBytes(StandardCharsets.UTF_8));
    using System;
    using System.Text;
    using System.Collections.Generic;
    using System.Security.Cryptography;
    using System.Linq;
    // Note: Typically, you would create a Dictionary object as paramDict
    public static string GenSignature(string secretKey, IEnumerable<KeyValuePair<string, string>> paramDict)
        StringBuilder sb = new StringBuilder();
        foreach (var param in paramDict.OrderBy(p => p.Key, StringComparer.Ordinal)) {
            var name = param.Key; 
            var value = param.Value ?? String.Empty;
        using (MD5 md5 = MD5.Create())
            var md5Bytes = md5.ComputeHash(Encoding.UTF8.GetBytes(sb.ToString()));
            return String.Concat(md5Bytes.Select(c => c.ToString("x2")));
    // Note: You can choose appropriate auxiliary tools according to the actual situation of your project.
    const crypto = require('crypto');
    var genSignature = function (secretKey, paramDict) {
        var sortedNames = Object.keys(paramDict).sort();
        var paramStr = '';
        for (var i=0; i<sortedNames.length; i++) {
            var name = sortedNames[i];
            paramStr += name + (paramDict[name] || '');
        paramStr += secretKey;
        return crypto.createHash('md5')
            .update(paramStr, "UTF-8")
    #!/usr/bin/env python
    # -*- coding: utf-8 -*-
    import hashlib
    """ Generate signature information
        secret_key Product private key
        param_dict API request parameters, excluding the signature parameter
    def gen_signature(secret_key, param_dict):
      param_str = ''.join([
        str(name) + str(param_dict[name] or '')
        for name
        in sorted(param_dict.keys())
      param_str += secret_key
      return hashlib.md5(param_str.encode("utf-8")).hexdigest()
     * Generate signature information
     * $secret_key Product private key
     * $params param_dict API request parameters, excluding the signature parameter
    function gen_signature($secret_key, $params) {
        $tmp_array = array_map(
            function ($value, $name) { return $name . ($value ?: ''); },
        $tmp_str = implode($tmp_array);
        $tmp_str .= $secret_key;
        return md5(mb_convert_encoding($tmp_str, "UTF-8"));
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