1 internal class CcbRsaCryptProvider
2 {
3 private static RSACryptoServiceProvider _providerForSign;
4 private static RSACryptoServiceProvider _providerForVerifySign;
5 private static readonly object SignObj = new object();
6 private static readonly object VerifySignObj = new object();
7
8 internal static RSACryptoServiceProvider GetInstanceForSign(string privateKeyFile)
9 {
10 if (null != _providerForSign) return _providerForSign;
11 lock (SignObj)
12 {
13 if (null != _providerForSign) return _providerForSign;
14 var provider = new RSACryptoServiceProvider();
15 provider.FromXmlString(GetXmlContent(privateKeyFile));
16 _providerForSign = provider;
17 }
18 return _providerForSign;
19 }
20
21 internal static RSACryptoServiceProvider GetInstanceForVerifySign(string publicKeyFile)
22 {
23 if (null != _providerForVerifySign) return _providerForVerifySign;
24 lock (VerifySignObj)
25 {
26 if (null != _providerForVerifySign) return _providerForVerifySign;
27 var provider = new RSACryptoServiceProvider();
28 provider.FromXmlString(GetXmlContent(publicKeyFile));
29 _providerForVerifySign = provider;
30 }
31 return _providerForVerifySign;
32 }
33
34 private static string GetXmlContent(string filePath)
35 {
36 return File.ReadAllText(filePath);
37 }
38
39 private CcbRsaCryptProvider()
40 {
41 }
42 }