protected static SymmetricAlgorithm CreateDecryptionAlgorithm(SecurityToken token, string encryptionMethod, SecurityAlgorithmSuite suite)
{
if (encryptionMethod == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.EncryptionMethodMissingInEncryptedData)));
}
suite.EnsureAcceptableEncryptionAlgorithm(encryptionMethod);
SymmetricSecurityKey symmetricSecurityKey = SecurityUtils.GetSecurityKey <SymmetricSecurityKey>(token);
if (symmetricSecurityKey == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.TokenCannotCreateSymmetricCrypto, token)));
}
suite.EnsureAcceptableDecryptionSymmetricKeySize(symmetricSecurityKey, token);
SymmetricAlgorithm algorithm = symmetricSecurityKey.GetSymmetricAlgorithm(encryptionMethod);
if (algorithm == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.UnableToCreateSymmetricAlgorithmFromToken, encryptionMethod)));
}
return(algorithm);
}
protected static SymmetricAlgorithm CreateDecryptionAlgorithm(SecurityToken token, string encryptionMethod, SecurityAlgorithmSuite suite)
{
if (encryptionMethod == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("EncryptionMethodMissingInEncryptedData")));
}
suite.EnsureAcceptableEncryptionAlgorithm(encryptionMethod);
SymmetricSecurityKey securityKey = System.ServiceModel.Security.SecurityUtils.GetSecurityKey<SymmetricSecurityKey>(token);
if (securityKey == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("TokenCannotCreateSymmetricCrypto", new object[] { token })));
}
suite.EnsureAcceptableDecryptionSymmetricKeySize(securityKey, token);
SymmetricAlgorithm symmetricAlgorithm = securityKey.GetSymmetricAlgorithm(encryptionMethod);
if (symmetricAlgorithm == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("UnableToCreateSymmetricAlgorithmFromToken", new object[] { encryptionMethod })));
}
return symmetricAlgorithm;
}
protected static SymmetricAlgorithm CreateDecryptionAlgorithm(SecurityToken token, string encryptionMethod, SecurityAlgorithmSuite suite)
{
if (encryptionMethod == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("EncryptionMethodMissingInEncryptedData")));
}
suite.EnsureAcceptableEncryptionAlgorithm(encryptionMethod);
SymmetricSecurityKey securityKey = System.ServiceModel.Security.SecurityUtils.GetSecurityKey <SymmetricSecurityKey>(token);
if (securityKey == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("TokenCannotCreateSymmetricCrypto", new object[] { token })));
}
suite.EnsureAcceptableDecryptionSymmetricKeySize(securityKey, token);
SymmetricAlgorithm symmetricAlgorithm = securityKey.GetSymmetricAlgorithm(encryptionMethod);
if (symmetricAlgorithm == null)
{
throw System.ServiceModel.DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(System.ServiceModel.SR.GetString("UnableToCreateSymmetricAlgorithmFromToken", new object[] { encryptionMethod })));
}
return(symmetricAlgorithm);
}
protected static SymmetricAlgorithm CreateDecryptionAlgorithm(SecurityToken token, string encryptionMethod, SecurityAlgorithmSuite suite)
{
if (encryptionMethod == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.EncryptionMethodMissingInEncryptedData)));
}
suite.EnsureAcceptableEncryptionAlgorithm(encryptionMethod);
SymmetricSecurityKey symmetricSecurityKey = SecurityUtils.GetSecurityKey<SymmetricSecurityKey>(token);
if (symmetricSecurityKey == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.TokenCannotCreateSymmetricCrypto, token)));
}
suite.EnsureAcceptableDecryptionSymmetricKeySize(symmetricSecurityKey, token);
SymmetricAlgorithm algorithm = symmetricSecurityKey.GetSymmetricAlgorithm(encryptionMethod);
if (algorithm == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new MessageSecurityException(
SR.GetString(SR.UnableToCreateSymmetricAlgorithmFromToken, encryptionMethod)));
}
return algorithm;
}
