public AesKey Map(XmlPoco.EnvCryptKey fromExternalRepresentationPoco)
{
// Map works ensures that at least the public key will be returned
Contract.Ensures(Contract.Result <AesKey>().Iv != null);
Contract.Ensures(Contract.Result <AesKey>().Iv.Length > 0);
Contract.Ensures(Contract.Result <AesKey>().Key != null);
Contract.Ensures(Contract.Result <AesKey>().Key.Length > 0);
//
if (fromExternalRepresentationPoco.Aes == null)
{
throw new EnvCryptException("AES element must be present in key");
}
// There will be only 1 key per XML POCO
if (string.IsNullOrWhiteSpace(fromExternalRepresentationPoco.Name))
{
throw new EnvCryptException("ECKey name in XML must not be empty");
}
if (fromExternalRepresentationPoco.Aes.Length != 1)
{
throw new EnvCryptException("ECKey XML must contain only one AES (1) key");
}
if (string.IsNullOrWhiteSpace(fromExternalRepresentationPoco.Aes[0].Iv))
{
throw new EnvCryptException("ECKey XML must contain at the IV for AES");
}
if (string.IsNullOrWhiteSpace(fromExternalRepresentationPoco.Aes[0].Key))
{
throw new EnvCryptException("ECKey XML must contain the Key for AES");
}
var xmlData = fromExternalRepresentationPoco.Aes[0];
var ret = new AesKey()
{
Name = fromExternalRepresentationPoco.Name
};
ret.Iv = _strConverter.Decode(xmlData.Iv);
ret.Key = _strConverter.Decode(xmlData.Key);
return(ret);
}
private RSAParameters GetRsaParametersFromXml(EnvCryptKeyRsa xmlData)
{
var rsaParameters = new RSAParameters();
// Exponent & Modulus not null check performed in pre-conidition
rsaParameters.Exponent = _strConverter.Decode(xmlData.Exponent);
rsaParameters.Modulus = _strConverter.Decode(xmlData.Modulus);
rsaParameters.D = xmlData.D == null ? null : _strConverter.Decode(xmlData.D);
rsaParameters.DP = xmlData.Dp == null ? null : _strConverter.Decode(xmlData.Dp);
rsaParameters.DQ = xmlData.Dq == null ? null : _strConverter.Decode(xmlData.Dq);
rsaParameters.InverseQ = xmlData.InverseQ == null ? null : _strConverter.Decode(xmlData.InverseQ);
rsaParameters.P = xmlData.P == null ? null : _strConverter.Decode(xmlData.P);
rsaParameters.Q = xmlData.Q == null ? null : _strConverter.Decode(xmlData.Q);
return(rsaParameters);
}