public async Task <DecryptedResponse> Execute(DecryptOfficeDocumentParameter decryptOfficeDocumentParameter, string accessToken, AuthenticateParameter authenticateParameter)
{
if (decryptOfficeDocumentParameter == null)
{
throw new ArgumentNullException(nameof(decryptOfficeDocumentParameter));
}
if (authenticateParameter == null)
{
throw new ArgumentNullException(nameof(authenticateParameter));
}
_decryptOfficeDocumentParameterValidator.Check(decryptOfficeDocumentParameter);
await _getOfficeDocumentAction.Execute(decryptOfficeDocumentParameter.DocumentId);
var jsonWebKey = await _jsonWebKeyRepository.Get(decryptOfficeDocumentParameter.Kid);
if (jsonWebKey == null)
{
throw new BaseDocumentManagementApiException(ErrorCodes.InvalidRequest, string.Format(ErrorDescriptions.TheJsonWebKeyDoesntExist, decryptOfficeDocumentParameter.Kid));
}
var payload = Convert.FromBase64String(decryptOfficeDocumentParameter.Credentials);
byte[] decryptedPayload = null;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
using (var provider = new RSACryptoServiceProvider())
{
provider.FromXmlStringCore(jsonWebKey.SerializedKey);
decryptedPayload = provider.Decrypt(payload, true);
}
}
else
{
using (var rsa = new RSAOpenSsl())
{
rsa.FromXmlString(jsonWebKey.SerializedKey);
decryptedPayload = rsa.Decrypt(payload, RSAEncryptionPadding.OaepSHA1);
}
}
var decryptedContent = Encoding.UTF8.GetString(decryptedPayload);
var splitted = decryptedContent.Split('.');
return(new DecryptedResponse
{
Password = splitted[0],
Salt = splitted[1]
});
}
private UserConnection ProcessClient(Socket s)
{
var ss = Encoding.ASCII.GetBytes("aaaa can you see this??");
s.Send(ss);
UserConnection conn = new UserConnection();
conn.Sock = s;
conn.Aes = new AesCryptoServiceProvider();
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
using (RSACng rsa = new RSACng(3072))
{
conn.Sock.Send(rsa.ExportRSAPublicKey());
var aesKey = new byte[384];
conn.Sock.Receive(aesKey);
conn.Aes.Key = rsa.Decrypt(aesKey, RSAEncryptionPadding.Pkcs1);
}
}
else
{
using (RSAOpenSsl rsa = new RSAOpenSsl(3072))
{
conn.Sock.Send(rsa.ExportRSAPublicKey());
var aesKey = new byte[384];
conn.Sock.Receive(aesKey);
conn.Aes.Key = rsa.Decrypt(aesKey, RSAEncryptionPadding.Pkcs1);
}
}
byte[] encryptedMsg;
var header = new byte[20];
conn.Aes.IV.CopyTo(header, 0);
using (MemoryStream mem = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(mem, conn.Aes.CreateEncryptor(), CryptoStreamMode.Write))
{
using (StreamWriter sw = new StreamWriter(cs))
sw.Write("OK!");
encryptedMsg = mem.ToArray();
}
}
BitConverter.GetBytes(encryptedMsg.Length).CopyTo(header, 16);
conn.Sock.Send(header);
conn.Sock.Send(encryptedMsg);
return(conn);
}
public byte[] Decrypt(
byte[] toBeDecrypted,
JsonWebKey jsonWebKey)
{
#if UAP
return(null);
#elif NET46 || NET45
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlString(jsonWebKey.SerializedKey);
return(rsa.Decrypt(toBeDecrypted, _oaep));
}
#elif NETSTANDARD
using (var rsa = new RSAOpenSsl())
{
rsa.FromXmlString(jsonWebKey.SerializedKey);
return(rsa.Decrypt(toBeDecrypted, RSAEncryptionPadding.Pkcs1));
}
#endif
}
public byte[] Decrypt(
byte[] toBeDecrypted,
JsonWebKey jsonWebKey)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
using (var rsa = new RSACryptoServiceProvider())
{
rsa.FromXmlStringNetCore(jsonWebKey.SerializedKey);
return(rsa.Decrypt(toBeDecrypted, _oaep));
}
}
else
{
using (var rsa = new RSAOpenSsl())
{
rsa.FromXmlStringNetCore(jsonWebKey.SerializedKey);
return(rsa.Decrypt(toBeDecrypted, RSAEncryptionPadding.Pkcs1));
}
}
}