public static byte[] Encrypt(byte[] data, KeyPair kp)
{
byte[] raw;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportCspBlob(Decompress(Base32.FromBase32String(kp.Public)));
raw = rsa.Encrypt(data, true);
}
return raw;
}
public static KeyPair CreateNew(int length)
{
KeyPair ret;
using (var rsa = new RSACryptoServiceProvider(length))
{
try
{
var pub = rsa.ExportCspBlob(false);
var priv = rsa.ExportCspBlob(true);
ret = new KeyPair(Base32.ToBase32String(Compress(pub)), Base32.ToBase32String(Compress(priv)));
}
finally
{
rsa.PersistKeyInCsp = false;
}
}
return ret;
}
public static bool VerifyData(KeyPair kp, byte[] data, byte[] signature)
{
bool b;
using (var rsa = new RSACryptoServiceProvider())
{
rsa.ImportCspBlob(Decompress(Base32.FromBase32String(kp.Public)));
b = rsa.VerifyData(data, new SHA1CryptoServiceProvider(), signature);
}
return b;
}
public static byte[] Sign(KeyPair kp, byte[] data)
{
byte[] signature;
using(var rsa = new RSACryptoServiceProvider())
{
rsa.ImportCspBlob(Decompress(Base32.FromBase32String(kp.Private)));
signature = rsa.SignData(data, new SHA1CryptoServiceProvider());
}
return signature;
}