public static string GenerarHash(AssemblyHashAlgorithm algoritmo, string cadena)
{
HashAlgorithm algoritmoHash = HashAlgorithm.Create(algoritmo.ToString());
try
{
byte[] buffer = algoritmoHash.ComputeHash(UTF7Encoding.UTF7.GetBytes(cadena));
return(BitConverter.ToString(buffer, 0).ToUpperInvariant().Replace("-", string.Empty));
}
finally
{
if (algoritmoHash != null)
{
algoritmoHash.Clear();
}
}
}
private void inicializar(string palabraClave, string semilla, AssemblyHashAlgorithm algoritmoHash, int numeroIteraciones)
{
byte[] bufferSemilla = Encoding.UTF8.GetBytes(semilla);
PasswordDeriveBytes password = new PasswordDeriveBytes(palabraClave, bufferSemilla)
{
HashName = algoritmoHash.ToString(), IterationCount = numeroIteraciones
};
byte[] bufferKey = password.GetBytes(32);
byte[] bufferIV = password.GetBytes(16);
this.algoritmoEncripcion = new RijndaelManaged();
this.algoritmoEncripcion.Mode = CipherMode.CBC;
this.algoritmoEncripcion.Key = bufferKey;
this.algoritmoEncripcion.IV = bufferIV;
}
private byte[] ComputeSignature(AssemblyHashAlgorithm hashAlgorithm, byte[] hash)
{
// Translate strong name private key to RSA parameters.
using var rsa = RSA.Create();
var rsaParameters = PrivateKey.ToRsaParameters();
rsa.ImportParameters(rsaParameters);
// Compute the signature.
var formatter = new RSAPKCS1SignatureFormatter(rsa);
formatter.SetHashAlgorithm(hashAlgorithm.ToString().ToUpperInvariant());
var signature = formatter.CreateSignature(hash);
Array.Reverse(signature);
return(signature);
}