微信支付 MD5 签名中文问题

作者: ccw1078 | 来源:发表于2018-07-27 11:44 被阅读0次

微信支付 MD5 签名中文问题
集成微信、支付宝支付
Android微信支付流程，以及-1错误排查
微信支付与分享问题
iOS-微信支付SDK
安卓查看签名信息 MD5 SHA1 SHA-256 签名到期时间
安卓获取签名信息，MD5，SHA1，SHA-256
OAuth2.0实战1(分析简书的微信登陆及实现)
安卓微信SDK登录出现 error code -6 签名错误
使用公钥完成签名验证

微信支付流程中，需要先调用微信商户平台的统一下单接口，生成 prepay_id，传输的参数值通常包含中文，示例如下：

image.png

因此，在进行 MD5 生成签名时，需要注意能够支持中文（注：部分第三方模块存在不支持中文的情况，导致生成的签名，与微信后台生成的签名不一致，出现”签名错误“的提示）

解决办法：使用支持中文的MD5 模块即可（模块附后）；

var md5 = require('./lib/js/md5.js') // 此处 md5 的存放地址为假设，应根据实际情况调整，md5 模块详细内容附后；
var sign = md5(stringSignTemp).toUpperCase(); //假设 stringSignTemp 已经整理好

以下是 md5 模块，其中用到的 crypto 模块也附在本文后面；

var crypt = require('./crypto.js');
var charenc = {
  // UTF-8 encoding
  utf8: {
    // Convert a string to a byte array
    stringToBytes: function(str) {
      return charenc.bin.stringToBytes(unescape(encodeURIComponent(str)));
    },

    // Convert a byte array to a string
    bytesToString: function(bytes) {
      return decodeURIComponent(escape(charenc.bin.bytesToString(bytes)));
    }
  },

  // Binary encoding
  bin: {
    // Convert a string to a byte array
    stringToBytes: function(str) {
      for (var bytes = [], i = 0; i < str.length; i++)
        bytes.push(str.charCodeAt(i) & 0xFF);
      return bytes;
    },

    // Convert a byte array to a string
    bytesToString: function(bytes) {
      for (var str = [], i = 0; i < bytes.length; i++)
        str.push(String.fromCharCode(bytes[i]));
      return str.join('');
    }
  }
};
var utf8 = charenc.utf8;
var bin = charenc.bin;

function isBuffer(obj) {
  return !!obj.constructor && typeof obj.constructor.isBuffer === 'function' && obj.constructor.isBuffer(obj)
}

// The core
var md5 = function(message, options) {
  // Convert to byte array
  if (message.constructor == String)
    if (options && options.encoding === 'binary')
      message = bin.stringToBytes(message);
    else
      message = utf8.stringToBytes(message);
  else if (isBuffer(message))
    message = Array.prototype.slice.call(message, 0);
  else if (!Array.isArray(message))
    message = message.toString();
  // else, assume byte array already

  var m = crypt.util.bytesToWords(message),
    l = message.length * 8,
    a = 1732584193,
    b = -271733879,
    c = -1732584194,
    d = 271733878;

  // Swap endian
  for (var i = 0; i < m.length; i++) {
    m[i] = ((m[i] << 8) | (m[i] >>> 24)) & 0x00FF00FF |
      ((m[i] << 24) | (m[i] >>> 8)) & 0xFF00FF00;
  }

  // Padding
  m[l >>> 5] |= 0x80 << (l % 32);
  m[(((l + 64) >>> 9) << 4) + 14] = l;

  // Method shortcuts
  var FF = md5._ff,
    GG = md5._gg,
    HH = md5._hh,
    II = md5._ii;

  for (var i = 0; i < m.length; i += 16) {

    var aa = a,
      bb = b,
      cc = c,
      dd = d;

    a = FF(a, b, c, d, m[i + 0], 7, -680876936);
    d = FF(d, a, b, c, m[i + 1], 12, -389564586);
    c = FF(c, d, a, b, m[i + 2], 17, 606105819);
    b = FF(b, c, d, a, m[i + 3], 22, -1044525330);
    a = FF(a, b, c, d, m[i + 4], 7, -176418897);
    d = FF(d, a, b, c, m[i + 5], 12, 1200080426);
    c = FF(c, d, a, b, m[i + 6], 17, -1473231341);
    b = FF(b, c, d, a, m[i + 7], 22, -45705983);
    a = FF(a, b, c, d, m[i + 8], 7, 1770035416);
    d = FF(d, a, b, c, m[i + 9], 12, -1958414417);
    c = FF(c, d, a, b, m[i + 10], 17, -42063);
    b = FF(b, c, d, a, m[i + 11], 22, -1990404162);
    a = FF(a, b, c, d, m[i + 12], 7, 1804603682);
    d = FF(d, a, b, c, m[i + 13], 12, -40341101);
    c = FF(c, d, a, b, m[i + 14], 17, -1502002290);
    b = FF(b, c, d, a, m[i + 15], 22, 1236535329);

    a = GG(a, b, c, d, m[i + 1], 5, -165796510);
    d = GG(d, a, b, c, m[i + 6], 9, -1069501632);
    c = GG(c, d, a, b, m[i + 11], 14, 643717713);
    b = GG(b, c, d, a, m[i + 0], 20, -373897302);
    a = GG(a, b, c, d, m[i + 5], 5, -701558691);
    d = GG(d, a, b, c, m[i + 10], 9, 38016083);
    c = GG(c, d, a, b, m[i + 15], 14, -660478335);
    b = GG(b, c, d, a, m[i + 4], 20, -405537848);
    a = GG(a, b, c, d, m[i + 9], 5, 568446438);
    d = GG(d, a, b, c, m[i + 14], 9, -1019803690);
    c = GG(c, d, a, b, m[i + 3], 14, -187363961);
    b = GG(b, c, d, a, m[i + 8], 20, 1163531501);
    a = GG(a, b, c, d, m[i + 13], 5, -1444681467);
    d = GG(d, a, b, c, m[i + 2], 9, -51403784);
    c = GG(c, d, a, b, m[i + 7], 14, 1735328473);
    b = GG(b, c, d, a, m[i + 12], 20, -1926607734);

    a = HH(a, b, c, d, m[i + 5], 4, -378558);
    d = HH(d, a, b, c, m[i + 8], 11, -2022574463);
    c = HH(c, d, a, b, m[i + 11], 16, 1839030562);
    b = HH(b, c, d, a, m[i + 14], 23, -35309556);
    a = HH(a, b, c, d, m[i + 1], 4, -1530992060);
    d = HH(d, a, b, c, m[i + 4], 11, 1272893353);
    c = HH(c, d, a, b, m[i + 7], 16, -155497632);
    b = HH(b, c, d, a, m[i + 10], 23, -1094730640);
    a = HH(a, b, c, d, m[i + 13], 4, 681279174);
    d = HH(d, a, b, c, m[i + 0], 11, -358537222);
    c = HH(c, d, a, b, m[i + 3], 16, -722521979);
    b = HH(b, c, d, a, m[i + 6], 23, 76029189);
    a = HH(a, b, c, d, m[i + 9], 4, -640364487);
    d = HH(d, a, b, c, m[i + 12], 11, -421815835);
    c = HH(c, d, a, b, m[i + 15], 16, 530742520);
    b = HH(b, c, d, a, m[i + 2], 23, -995338651);

    a = II(a, b, c, d, m[i + 0], 6, -198630844);
    d = II(d, a, b, c, m[i + 7], 10, 1126891415);
    c = II(c, d, a, b, m[i + 14], 15, -1416354905);
    b = II(b, c, d, a, m[i + 5], 21, -57434055);
    a = II(a, b, c, d, m[i + 12], 6, 1700485571);
    d = II(d, a, b, c, m[i + 3], 10, -1894986606);
    c = II(c, d, a, b, m[i + 10], 15, -1051523);
    b = II(b, c, d, a, m[i + 1], 21, -2054922799);
    a = II(a, b, c, d, m[i + 8], 6, 1873313359);
    d = II(d, a, b, c, m[i + 15], 10, -30611744);
    c = II(c, d, a, b, m[i + 6], 15, -1560198380);
    b = II(b, c, d, a, m[i + 13], 21, 1309151649);
    a = II(a, b, c, d, m[i + 4], 6, -145523070);
    d = II(d, a, b, c, m[i + 11], 10, -1120210379);
    c = II(c, d, a, b, m[i + 2], 15, 718787259);
    b = II(b, c, d, a, m[i + 9], 21, -343485551);

    a = (a + aa) >>> 0;
    b = (b + bb) >>> 0;
    c = (c + cc) >>> 0;
    d = (d + dd) >>> 0;
  }

  return crypt.util.endian([a, b, c, d]);
};

// Auxiliary functions
md5._ff = function(a, b, c, d, x, s, t) {
  var n = a + (b & c | ~b & d) + (x >>> 0) + t;
  return ((n << s) | (n >>> (32 - s))) + b;
};
md5._gg = function(a, b, c, d, x, s, t) {
  var n = a + (b & d | c & ~d) + (x >>> 0) + t;
  return ((n << s) | (n >>> (32 - s))) + b;
};
md5._hh = function(a, b, c, d, x, s, t) {
  var n = a + (b ^ c ^ d) + (x >>> 0) + t;
  return ((n << s) | (n >>> (32 - s))) + b;
};
md5._ii = function(a, b, c, d, x, s, t) {
  var n = a + (c ^ (b | ~d)) + (x >>> 0) + t;
  return ((n << s) | (n >>> (32 - s))) + b;
};

// Package private blocksize
md5._blocksize = 16;
md5._digestsize = 16;

module.exports = function(message, options) {
  if (message === undefined || message === null)
    throw new Error('Illegal argument ' + message);

  var digestbytes = crypt.util.wordsToBytes(md5(message, options));
  return options && options.asBytes ? digestbytes :
    options && options.asString ? bin.bytesToString(digestbytes) :
    crypt.util.bytesToHex(digestbytes);
};

以下是 crypto 模块

/*!
 * Crypto-JS v1.1.0
 * http://code.google.com/p/crypto-js/
 * Copyright (c) 2009, Jeff Mott. All rights reserved.
 * http://code.google.com/p/crypto-js/wiki/License
 */

const Crypto = {};

(function(){

var base64map = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";


// Crypto utilities
var util = Crypto.util = {

    // Bit-wise rotate left
    rotl: function (n, b) {
        return (n << b) | (n >>> (32 - b));
    },

    // Bit-wise rotate right
    rotr: function (n, b) {
        return (n << (32 - b)) | (n >>> b);
    },

    // Swap big-endian to little-endian and vice versa
    endian: function (n) {

        // If number given, swap endian
        if (n.constructor == Number) {
            return util.rotl(n,  8) & 0x00FF00FF |
                   util.rotl(n, 24) & 0xFF00FF00;
        }

        // Else, assume array and swap all items
        for (var i = 0; i < n.length; i++)
            n[i] = util.endian(n[i]);
        return n;

    },

    // Generate an array of any length of random bytes
    randomBytes: function (n) {
        for (var bytes = []; n > 0; n--)
            bytes.push(Math.floor(Math.random() * 256));
        return bytes;
    },

    // Convert a string to a byte array
    stringToBytes: function (str) {
        var bytes = [];
        for (var i = 0; i < str.length; i++)
            bytes.push(str.charCodeAt(i));
        return bytes;
    },

    // Convert a byte array to a string
    bytesToString: function (bytes) {
        var str = [];
        for (var i = 0; i < bytes.length; i++)
            str.push(String.fromCharCode(bytes[i]));
        return str.join("");
    },

    // Convert a string to big-endian 32-bit words
    stringToWords: function (str) {
        var words = [];
        for (var c = 0, b = 0; c < str.length; c++, b += 8)
            words[b >>> 5] |= str.charCodeAt(c) << (24 - b % 32);
        return words;
    },

    // Convert a byte array to big-endian 32-bits words
    bytesToWords: function (bytes) {
        var words = [];
        for (var i = 0, b = 0; i < bytes.length; i++, b += 8)
            words[b >>> 5] |= bytes[i] << (24 - b % 32);
        return words;
    },

    // Convert big-endian 32-bit words to a byte array
    wordsToBytes: function (words) {
        var bytes = [];
        for (var b = 0; b < words.length * 32; b += 8)
            bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF);
        return bytes;
    },

    // Convert a byte array to a hex string
    bytesToHex: function (bytes) {
        var hex = [];
        for (var i = 0; i < bytes.length; i++) {
            hex.push((bytes[i] >>> 4).toString(16));
            hex.push((bytes[i] & 0xF).toString(16));
        }
        return hex.join("");
    },

    // Convert a hex string to a byte array
    hexToBytes: function (hex) {
        var bytes = [];
        for (var c = 0; c < hex.length; c += 2)
            bytes.push(parseInt(hex.substr(c, 2), 16));
        return bytes;
    },

    // Convert a byte array to a base-64 string
    bytesToBase64: function (bytes) {

        // Use browser-native function if it exists
        if (typeof btoa == "function") return btoa(util.bytesToString(bytes));

        var base64 = [],
            overflow;

        for (var i = 0; i < bytes.length; i++) {
            switch (i % 3) {
                case 0:
                    base64.push(base64map.charAt(bytes[i] >>> 2));
                    overflow = (bytes[i] & 0x3) << 4;
                    break;
                case 1:
                    base64.push(base64map.charAt(overflow | (bytes[i] >>> 4)));
                    overflow = (bytes[i] & 0xF) << 2;
                    break;
                case 2:
                    base64.push(base64map.charAt(overflow | (bytes[i] >>> 6)));
                    base64.push(base64map.charAt(bytes[i] & 0x3F));
                    overflow = -1;
            }
        }

        // Encode overflow bits, if there are any
        if (overflow != undefined && overflow != -1)
            base64.push(base64map.charAt(overflow));

        // Add padding
        while (base64.length % 4 != 0) base64.push("=");

        return base64.join("");

    },

    // Convert a base-64 string to a byte array
    base64ToBytes: function (base64) {

        // Use browser-native function if it exists
        if (typeof atob == "function") return util.stringToBytes(atob(base64));

        // Remove non-base-64 characters
        base64 = base64.replace(/[^A-Z0-9+\/]/ig, "");

        var bytes = [];

        for (var i = 0; i < base64.length; i++) {
            switch (i % 4) {
                case 1:
                    bytes.push((base64map.indexOf(base64.charAt(i - 1)) << 2) |
                               (base64map.indexOf(base64.charAt(i)) >>> 4));
                    break;
                case 2:
                    bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0xF) << 4) |
                               (base64map.indexOf(base64.charAt(i)) >>> 2));
                    break;
                case 3:
                    bytes.push(((base64map.indexOf(base64.charAt(i - 1)) & 0x3) << 6) |
                               (base64map.indexOf(base64.charAt(i))));
                    break;
            }
        }

        return bytes;

    }

};

// Crypto mode namespace
Crypto.mode = {};

})();

module.exports = Crypto;

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