RSA 签名-PKCS1

本文主要是介绍RSA 签名-PKCS1，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

前段时间做东西做的很杂，现在从新整理归类下，以便于进一步加深知识点。

针对于RSA签名来说，首先需要公钥，私钥

我现在用的是PKCS1格式的公钥私钥，也就是密钥格式为非Java适用的

1：生成公钥私钥，我直接使用的是支付宝官网上下载的RSA签名/验签的工具。

string privateKeyPem = "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";
string publicKey = "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxEZE8RRghiP/IKw36x8L9qOX3RE1pU70A+4KirahmUJQrhQ2ow8e09gZkkeRnKKZA5fwq94x8rIW1IN06iAgbAax5H7Q6rUniBp672eEvxbCzp2p6kT7D/lcqlzLDBUO/fCGr2HXHc1L1DHkv4fCS58ac82IzVQ1ZS5S+m+awBXaKstf84MbRIFPcg8YkLGLC7YIqYzGtHWg5ksF1HK8uIEBZUxT9932VuNrR9j/QBB6yT06/BvTrdf0R7iIAklmELbZL8l/IRpNVqMEsvgzw/Tl6KI3FfiN5/kC0oe9dXWn8iwYb4jlu/gSADQNrpd93YoRMQg1i+uGgaIh8yiX/wIDAQAB";
string signType = "RSA2";

 记得要对公钥私钥去空格换行操作哦

2：生成待签字符串

//待签集合
Dictionary<string, string> ParamInfo = new Dictionary<string, string>();
ParamInfo.Add("timestamp","20191112135000");
ParamInfo.Add("noncestr","123sdsf");
ParamInfo.Add("name", "张三");
//对报文中出现签名域（signature）之外的所有数据元按照key的ascii顺序排序，然后以&作为连接符拼接成待签名串。
string signContent = SignUtil.GetSignContent(ParamInfo);

3：签名

string signatureNew = string.Empty;
signatureNew = SignUtil.RSASignCharSet(signContent, privateKeyPem, null, false, signType);

4：验签-不在签名步骤内。。。

bool check = false;
check = SignUtil.RSACheck(signContent, signatureNew, publicKey, null, false, signType);

check 为true 标识验签成功，false 表示 失败。 

5：把签名放入报文集合中！这样整个报文才算签名完成。

 

签名所需要的类SignUtil （支持RSA，RSA2的签名及验签）

 public class SignUtil{/** 默认编码字符集 */private static string DEFAULT_CHARSET = "UTF-8";/// <summary>/// 待签字符串/// </summary>/// <param name="parameters"></param>/// <returns></returns>public static string GetSignContent(IDictionary<string, string> parameters){// 第一步：把字典按Key的字母顺序排序IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(parameters);IEnumerator<KeyValuePair<string, string>> dem = sortedParams.GetEnumerator();// 第二步：把所有参数名和参数值串在一起StringBuilder query = new StringBuilder("");while (dem.MoveNext()){string key = dem.Current.Key;string value = dem.Current.Value;if (!string.IsNullOrEmpty(key) && !string.IsNullOrEmpty(value)){query.Append(key).Append("=").Append(value).Append("&");}}string content = query.ToString().Substring(0, query.Length - 1);return content;}/// <summary>/// 签名/// </summary>/// <param name="parameters">待签集合</param>/// <param name="privateKeyPem">私钥 默认为文件</param>/// <param name="charset">编码类型 默认为UTF-8</param>/// <param name="signType">签名类型 RSA、RSA2</param>/// <returns></returns>public static string RSASign(IDictionary<string, string> parameters, string privateKeyPem, string charset, string signType){string signContent = GetSignContent(parameters);return RSASignCharSet(signContent, privateKeyPem, charset, signType);}/// <summary>/// 签名/// </summary>/// <param name="data">待签字符串</param>/// <param name="privateKeyPem">私钥</param>/// <param name="charset">编码类型 默认为UTF-8</param>/// <param name="signType">签名类型 RSA、RSA2</param>/// <returns></returns>public static string RSASign(string data, string privateKeyPem, string charset, string signType){return RSASignCharSet(data, privateKeyPem, charset, signType);}/// <summary>/// 签名/// </summary>/// <param name="parameters">待签集合</param>/// <param name="privateKeyPem">私钥</param>/// <param name="charset">编码类型 默认为UTF-8</param>/// <param name="keyFromFile">私钥类型 true：文件读取；false：字符串读取</param>/// <param name="signType">签名类型 RSA、RSA2</param>/// <returns></returns>public static string RSASign(IDictionary<string, string> parameters, string privateKeyPem, string charset, bool keyFromFile, string signType){string signContent = GetSignContent(parameters);return RSASignCharSet(signContent, privateKeyPem, charset, keyFromFile, signType);}public static string RSASignCharSet(string data, string privateKeyPem, string charset, string signType){RSACryptoServiceProvider rsaCsp = LoadCertificateFile(privateKeyPem, signType);byte[] dataBytes = null;if (string.IsNullOrEmpty(charset)){

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