.net中RSA加密解密

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1、产生密钥：
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 <pre class="blockcode">private static void CreateKey()
 {
 using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
 {
 string publicKey = rsa.ToXmlString(false); // 公钥
 string privateKey = rsa.ToXmlString(true); // 私钥 
 }
 }</pre>
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这里产生的密钥是xml格式的，这也是.net的rsa的密钥格式。但有时候在.net项目中，我们只有java格式的密钥，具体的来说密钥就是一个字符串，这时候需要将其转换为xml格式的。
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 <pre class="blockcode">//公钥格式的转换
public static string RsaPublicKeyToXml(string publicKey)
 {
 try
 {
 if (string.IsNullOrWhiteSpace(publicKey))
 return "";
 if (publicKey.Contains("<RSAKeyValue>"))
 return publicKey;
 RsaKeyParameters publicKeyParam;
 //尝试进行java格式的密钥读取
 try
 {
 publicKeyParam = (RsaKeyParameters)PublicKeyFactory.CreateKey(Convert.FromBase64String(publicKey));
 }
 catch
 {
 publicKeyParam = null;
 }
 //非java格式密钥进行pem格式的密钥读取
 if (publicKeyParam == null)
 {
 try
 {
 var pemKey = publicKey;
 if (!pemKey.Contains("BEGIN RSA PRIVATE KEY"))
 {
 pemKey = @"-----BEGIN RSA PRIVATE KEY-----
 " + publicKey + @"
 -----END RSA PRIVATE KEY-----";
 }
 var array = Encoding.ASCII.GetBytes(pemKey);
 var stream = new MemoryStream(array);
 var reader = new StreamReader(stream);
 var pemReader = new Org.BouncyCastle.OpenSsl.PemReader(reader);
 publicKeyParam = (RsaKeyParameters)pemReader.ReadObject();
 }
 catch
 {
 publ

.net中RSA加密解密

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