public async Task<bool> Verify()
{
var sw = Stopwatch.StartNew();
Console.WriteLine("enter Verify");
var v = new RSACryptoStream(NamedKeyPairs.Key1PrivateKey.RSAParameters).VerifyString(this.SpecialData, this.SpecialDataSignature48);
Console.WriteLine("exit Verify " + new { sw.ElapsedMilliseconds });
return v;
}
public static void Main(string[] args)
{
// Z:\jsc.svn\examples\javascript\android\Test\TestAndroidWebCryptoKeyImport\TestAndroidWebCryptoKeyImport\Application.cs
// jvm wants 512bits keys
// jvmMinKeySize = 23
var jvmMinKeySize = MaxDataFromdwKeySize(512);
var keygensw = Stopwatch.StartNew();
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(4096));
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(2048));
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(256));
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(1024));
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(64)); // 105
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(65)); // 106
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(49)); // 90
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(39)); // 80
var MaxData = 7;
var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(MaxData)); // 50
//var rsa = new RSACryptoServiceProvider(dwKeySize: dwKeySizeFromMaxData(4)); // error
// Additional information: Invalid flags specified.
var struct_rsaprivate = rsa.ExportParameters(includePrivateParameters: true);
var bytes_rsaprivate = rsa.ExportCspBlob(includePrivateParameters: true);
keygensw.Stop();
// { ElapsedMilliseconds = 33, KeySize = 840 }
// { ElapsedMilliseconds = 103558, KeySize = 8520 }
// { ElapsedMilliseconds = 35335, KeySize = 8520 }
Console.WriteLine(new { keygensw.ElapsedMilliseconds, rsa.KeySize, maxdata = MaxDataFromdwKeySize(rsa.KeySize) });
var fOAEP = true;
// Additional information: Bad Length.
//var data = rsa.Encrypt(Encoding.UTF8.GetBytes("".PadLeft(37, '?')), fOAEP: fOAEP);
var data = rsa.Encrypt(Encoding.UTF8.GetBytes("".PadLeft(MaxData - 1, '?')), fOAEP: fOAEP);
var datadecrypt = rsa.Decrypt(data, fOAEP: fOAEP);
// http://stackoverflow.com/questions/1199058/how-to-use-rsa-to-encrypt-files-huge-data-in-c-sharp
// data = {byte[256]}
var rsa2 = new RSACryptoServiceProvider();
//rsa2.ImportParameters(struct_rsaprivate);
rsa2.ImportCspBlob(bytes_rsaprivate);
var decryptsw = Stopwatch.StartNew();
//var data2 = rsa2.Decrypt(data, fOAEP: false);
// Additional information: Error occurred while decoding OAEP padding.
var data2 = rsa2.Decrypt(data, fOAEP: fOAEP);
var text2 = Encoding.UTF8.GetString(data2);
decryptsw.Stop();
// { ElapsedMilliseconds = 0, Length = 105, text2 = hello world }
Console.WriteLine(new
{
decryptsw.ElapsedMilliseconds,
rsa.KeySize,
maxidata = MaxDataFromdwKeySize(rsa.KeySize),
maxodata = dwKeySizeToEncryptedDataLength(rsa.KeySize),
odata = data.Length,
itext = text2.Length
});
// rsa cannot encrypt too much data huh?
// unless we have a bigger key?
//{ ElapsedMilliseconds = 0, KeySize = 384, maxidata = 7, maxodata = 48, odata = 48, itext = 37 }
// this is how we rsa encrypt with small key
var s = new RSACryptoStream(rsa2);
var sdata = s.EncryptString("hello world".PadRight(128, ' '));
var stext = s.DecryptString(sdata);
// now how do we sign it?
// http://blogs.msdn.com/b/alejacma/archive/2008/06/25/how-to-sign-and-verify-the-signature-with-net-and-a-certificate-c.aspx
// https://msdn.microsoft.com/en-us/library/9tsc5d0z(v=vs.110).aspx
var sign3 = rsa2.SignData(data2, new SHA1CryptoServiceProvider());
var stextu = stext.ToUpper();
var verify3 = rsa2.VerifyData(Encoding.UTF8.GetBytes(stextu), new SHA1CryptoServiceProvider(), sign3);
//verify3 = false
// verify3 = true
// Z:\jsc.svn\examples\java\hybrid\JVMCLRRSA\JVMCLRRSA\Program.cs
// + InnerException {"Common Language Runtime detected an invalid program."} System.Exception {System.InvalidProgramException}
//var rsa3 = new RSACryptoStream(NamedKeyPairs.Key1PrivateKey.CSPBlob);
var rsa3 = new RSACryptoStream(NamedKeyPairs.Key1PrivateKey.RSAParameters);
Console.WriteLine(new { rsa3.KeySize, rsa3.EncryptedDataChunkSize });
var rsa3e = rsa3.EncryptString(("hello world " + new { rsa3.rsa.KeySize }).PadRight(1024));
var rsa3t = rsa3.DecryptString(rsa3e);
// Z:\jsc.svn\examples\javascript\Test\TestWebCrypto\TestWebCrypto\Application.cs
//at System.Security.Cryptography.CryptographicException.ThrowCryptographicException(Int32 hr)
//at System.Security.Cryptography.Utils.SignValue(SafeKeyHandle hKey, Int32 keyNumber, Int32 calgKey, Int32 calgHash, Byte[] hash, Int32 cbHash, ObjectHandleOnStack retSignature)
//at System.Security.Cryptography.Utils.SignValue(SafeKeyHandle hKey, Int32 keyNumber, Int32 calgKey, Int32 calgHash, Byte[] hash)
//at System.Security.Cryptography.RSACryptoServiceProvider.SignHash(Byte[] rgbHash, Int32 calgHash)
//at System.Security.Cryptography.RSACryptoServiceProvider.SignData(Byte[] buffer, Object halg)
//at TestWebServiceRSA.Program.Main(String[] args) in z:\jsc.svn\examples\javascript\crypto\test\TestWebServiceRSA\TestWebServiceRSA\Program.cs:line 131
var rsa3sig = rsa3.rsa.SignData(
Encoding.UTF8.GetBytes(rsa3t),
new SHA1CryptoServiceProvider()
);
var rsa3verify = rsa3.rsa.VerifyData(
Encoding.UTF8.GetBytes(rsa3t),
new SHA1CryptoServiceProvider(),
rsa3sig
);
//rsa3verify = true
var rsa3tu = rsa3t.ToUpper();
var rsa3uverify = rsa3.rsa.VerifyData(
Encoding.UTF8.GetBytes(rsa3tu),
new SHA1CryptoServiceProvider(),
rsa3sig
);
var rsa3tusig = rsa3.SignString(rsa3tu);
var rsa3tuverify = rsa3.VerifyString(rsa3tu, rsa3tusig);
// rsa3sig = {byte[48]}
// rsa3uverify = false
RewriteToUltraApplication.AsProgram.Launch(typeof(Application));
}