T DecryptFiveByFive(T item)
{
var properties = ToDictionary(new ProjectionProxy(item));
var tokenId = properties["id"];
var code = properties["code"];
var hash = properties["hash"];
var salt = TokenIdentifier.Parse(tokenId.Value).MintRequestId.ToByteArray();
using (var tokenCode = tokenSecurity.DecryptFromBase64(code.Value, hash.Value, salt))
{
var fiveByFive = SecureStringToGlobalAllocAnsi(tokenCode);
try
{
code.Value = PtrToStringAnsi(fiveByFive);
}
finally
{
if (fiveByFive != IntPtr.Zero)
{
ZeroFreeGlobalAllocAnsi(fiveByFive);
}
}
}
return(item);
}
public async Task <TokenPackage> CreatePackage(IEnumerable <TokenReference> tokens, string thumbprint)
{
var certificate = certificateLocator.LocateByThumbprint(thumbprint);
//var publicKey = certificate.PublicKey.Key;
// TODO: encrypt package file stream using certificate
// TODO: compress package? zip? mime type = application/zip
// REF: https://msdn.microsoft.com/en-us/library/system.security.cryptography.x509certificates.x509certificate2.aspx
using (var package = new TokenPackage("text/csv"))
using (var writer = new StreamWriter(package, ASCII))
{
foreach (var token in tokens)
{
var id = Parse(token.Id);
var salt = id.MintRequestId.ToByteArray();
var tokenCode = tokenSecurity.DecryptFromBase64(token.Code, token.Hash, salt);
var @string = Zero;
var fiveByFive = default(string);
try
{
@string = SecureStringToGlobalAllocAnsi(tokenCode);
fiveByFive = PtrToStringAnsi(@string);
}
finally
{
if (@string != Zero)
{
ZeroFreeGlobalAllocAnsi(@string);
}
}
await writer.WriteAsync(token.Id);
await writer.WriteAsync(",");
await writer.WriteLineAsync(fiveByFive);
}
await writer.FlushAsync();
package.Position = 0L;
return(package);
}
}
Token DecryptFiveByFive(Token token)
{
var salt = TokenIdentifier.Parse(token.Id).MintRequestId.ToByteArray();
using (var tokenCode = tokenSecurity.DecryptFromBase64(token.Code, token.Hash, salt))
{
var fiveByFive = SecureStringToGlobalAllocAnsi(tokenCode);
try
{
token.Code = PtrToStringAnsi(fiveByFive);
}
finally
{
if (fiveByFive != IntPtr.Zero)
{
ZeroFreeGlobalAllocAnsi(fiveByFive);
}
}
}
return(token);
}