.Net Core微信服务商二次进件的开发
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2022-06-09 20:34:15
最近商城进行微信服务商二次进件的开发,大致有几个点一,服务商签名二,服务商证书获取三,图片上传四,敏感信息加密五,查询进件状态除此之外,就是进件信息的拼装电商二级商户进件申请单-状态流转一 服务商签名...
最近商城进行微信服务商二次进件的开发,大致有几个点
一,服务商签名
二,服务商证书获取
三,图片上传
四,敏感信息加密
五,查询进件状态
除此之外,就是进件信息的拼装
电商二级商户进件申请单-状态流转
一 服务商签名
首先准备必须的配置:商户号、证书、秘钥、小程序appid、appsecret
#region 服务商签名 private string srvpaybuildauthasync(string uri, string body, string method = "post") { var timestamp = datetimeoffset.now.tounixtimeseconds(); string nonce = guid.newguid().tostring(); string message = $"{method}\n{uri}\n{timestamp}\n{nonce}\n{body}\n"; string signature = srvsign(message); return $"mchid=\"{_wxcfg.srvpaymerchantid}\",nonce_str=\"{nonce}\",timestamp=\"{timestamp}\",serial_no=\"{_wxcfg.srvpaycertno}\",signature=\"{signature}\""; } private string srvsign(string message) { var bytes = utils.readbytesifexist(_wxcfg.srvpaycertfile); if (bytes is null) { return ""; } x509certificate2 cert = new(bytes, _wxcfg.srvpaymerchantid); rsa rsa = cert.getrsaprivatekey(); var signdata = rsa.signdata(encoding.utf8.getbytes(message), hashalgorithmname.sha256, rsasignaturepadding.pkcs1); return convert.tobase64string(signdata); }
二 获取证书
分为:第一步获取证书,第二步解密证书
1 获取证书
https://api.mch.weixin.qq.com/v3/certificates
#region 获取平台证书 public async task<certificatesoutmodel> getsrvcert() { string uri = "/v3/certificates"; var auth = srvpaybuildauthasync(uri, "", "get"); var header = new dictionary<string, string> { { "authorization",$"wechatpay2-sha256-rsa2048 {auth}"}, { "accept","*/*" }, { "accept-encoding","gzip,deflate,brn" }, { "user-agent", "mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/90.0.4430.85 safari/537.36 edg/90.0.818.46" }, }; return await geturlasync<certificatesoutmodel>(uri, header); } #endregion
使用的实体:certificatesoutmodel
public sealed class certificatesoutmodel : iwxresponse { [jsonpropertyname("data")] public ienumerable<certificates> data { get; set; } public string code { get; set; } public string message { get; set; } } public class certificates { [jsonpropertyname("serial_no")] public string serialno { get; set; } [jsonpropertyname("effective_time")] public string effectivetime { get; set; } [jsonpropertyname("expire_time")] public string expiretime { get; set; } [jsonpropertyname("encrypt_certificate")] public encryptcertificate encryptcertificate { get; set; } }
请求方法:geturlasync
protected async task<t> geturlasync<t>(string url, dictionary<string, string> headers = null) { httpresponsemessage res = null; try { if (headers != null && headers.count > 0) { foreach (var header in headers) { _client.defaultrequestheaders.tryaddwithoutvalidation(header.key, header.value); } } res = await _client.getasync(url); res.ensuresuccessstatuscode(); var result = await res.content.readasstringasync(); if (result == null) { return default; } return result.tojson<t>(); } catch { var result = await res.content.readasstringasync(); if (result == null) { return default; } return result.tojson<t>(); } }
解密方法
//获取证书 var cert = await _wxclient.getsrvcert(); var certificatemodel = cert.data.firstordefault(); if (!cert.data.any()) { return new mkresult<v3wxpayapplymentidoutmodel>(code: 400, msg: "未获取到平台证书"); } if (!string.isnullorempty(applyment.body.serialno)) { certificatemodel = cert.data.singleordefault(s => s.serialno == applyment.body.serialno); } certificatemodel.encryptcertificate.ciphertext = aesutility.aesgcmdecrypt( _wxcfg.srvapiv3key, certificatemodel.encryptcertificate.associateddata, certificatemodel.encryptcertificate.nonce, certificatemodel.encryptcertificate.ciphertext );
三,上传图片
因为我的图片保存在oss,首先要网络图片bytes,对图片进行sha256,方法在后面
protected async task<byte[]> geturlbytesasync(string url, dictionary<string, string> headers = null) { try { if (headers != null && headers.count > 0) { foreach (var header in headers) { _client.defaultrequestheaders.tryaddwithoutvalidation(header.key, header.value); } } var res = await _client.getasync(url); res.ensuresuccessstatuscode(); return await res.content.readasbytearrayasync(); } catch { return default; } }
然后上传图片
/// <summary> /// 上传图片 /// </summary> /// <param name="url"></param> /// <returns></returns> public async task<mkresult<v3wxpayfileuploadoutmodel>> uploadfile(string url) { string filecontenttype; string filetype; if (url!.contains(".bmp", stringcomparison.ordinalignorecase)) { filecontenttype = "image/bmp"; filetype = ".bmp"; } else if (url!.contains(".jpg", stringcomparison.ordinalignorecase)) { filecontenttype = "image/jpeg"; filetype = ".jpg"; } else if (url!.contains(".jpeg", stringcomparison.ordinalignorecase)) { filecontenttype = "image/jpeg"; filetype = ".jpeg"; } else { filecontenttype = "image/png"; filetype = ".png"; } uploadmerchantmediaimagerequest meta = new(); var filebytes = await geturlbytesasync(url);//获取网络图片bytes if ((filebytes?.length ?? 0) == 0) { return new mkresult<v3wxpayfileuploadoutmodel>(code: 400, msg: "转换图片失败"); } meta.filehash = gethash(filebytes); meta.filename = guid.newguid().tostring("n").tolower() + filetype; string boundary = "--boundary--" + datetimeoffset.now.ticks.tostring("x"); using var filecontent = new bytearraycontent(filebytes); using var metacontent = new stringcontent(meta.tojson(), encoding.utf8, "application/json"); using var httpcontent = new multipartformdatacontent(boundary); httpcontent.add(metacontent, "\"meta\"");//meta 必须要加双引号 httpcontent.add(filecontent, "\"file\"", "\"" + meta.filename + "\"");//必须要加双引号 httpcontent.headers.contenttype = mediatypeheadervalue.parse("multipart/form-data; boundary=" + boundary);// boundary不能加引号 metacontent.headers.contenttype = mediatypeheadervalue.parse("application/json"); filecontent.headers.contenttype = mediatypeheadervalue.parse(filecontenttype); var uri = $"/v3/merchant/media/upload"; var res = await v3uploadfile<v3wxpayfileuploadoutmodel>(uri, meta.tojson(), httpcontent); return new mkresult<v3wxpayfileuploadoutmodel>(res, 1); }
private async task<t> v3uploadfile<t>(string uri, string meta, multipartformdatacontent content) { var auth = srvpaybuildauthasync(uri, meta); var header = new dictionary<string, string> { { "authorization",$"wechatpay2-sha256-rsa2048 {auth}"}, { "accept","*/*" }, { "accept-encoding","gzip,deflate,brn" }, { "user-agent", "mozilla/5.0 (windows nt 10.0; win64; x64) applewebkit/537.36 (khtml, like gecko) chrome/90.0.4430.85 safari/537.36 edg/90.0.818.46" }, }; return await v3postfileasync<t>(uri, header, content); }
protected async task<t> v3postfileasync<t>(string url, dictionary<string, string> headers, multipartformdatacontent content) { httpresponsemessage res = null; try { if (headers != null && headers.count > 0) { foreach (var header in headers) { _client.defaultrequestheaders.tryaddwithoutvalidation(header.key, header.value); } } res = await _client.postasync(url, content); res.ensuresuccessstatuscode(); var result = await res.content.readasstringasync(); if (result == null) { return default; } return result.tojson<t>(); } catch { var result = await res.content.readasstringasync(); if (result == null) { return default; } return result.tojson<t>(); } finally { if (content != null) { content.dispose(); } } }
#region 二进制内容进行sha256 private static string gethash(byte[] bytes) { if (bytes == null) throw new argumentnullexception(nameof(bytes)); using sha256 sha = sha256.create(); byte[] hashbytes = sha.computehash(bytes); return bitconverter.tostring(hashbytes).replace("-", "").tolower(); }
四,敏感信息加密
使用获取到的证书certificatemodel,进行加密
public static class rsautility { public static string rsaencrypt(string text, certificates certificatemodel) { var bytes = encoding.utf8.getbytes(certificatemodel.encryptcertificate.ciphertext); using var x509 = new x509certificate2(bytes); var rsaparam = x509.getrsapublickey().exportparameters(false); var rsa = new rsacryptoserviceprovider(); rsa.importparameters(rsaparam); var buff = rsa.encrypt(encoding.utf8.getbytes(text), true); return convert.tobase64string(buff); } }
五,查询进件状态
直接使用进件返回的id,调用接口查询就ok了
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