如何使用System.Cryptography解密EncryptedAssertion [英] How to Decrypt EncryptedAssertion using System.Cryptography

问题描述

身份提供者正在使用组件pro的功能对Saml断言进行加密

The Identity provider is encrypting the Saml Assertion using the functions of component pro

Dim encryptedSamlAssertion As New EncryptedAssertion(samlAssertion, encryptingCert, New System.Security.Cryptography.Xml.EncryptionMethod(SamlKeyAlgorithm.Aes256Cbc))

在服务提供商处，我试图解密断言.但是我不能使用component pro.我必须使用System.Security.Cryptography

At the Service Provider I am trying to Decrypt the assertion. But I cannot use component pro. I have to use System.Security.Cryptography

• X509证书用于加密和解密
• Aes256Cbc是加密算法

请帮助我提供更多有关如何使用X509Certificate和Aes256Cbc算法解密SamlAssertions的信息

Please help in providing me some more information on how can I achieve Decryption of SamlAssertions using X509Certificate and Aes256Cbc Algorithm

推荐答案

private class Saml2SSOSecurityTokenResolver : SecurityTokenResolver
{
    List<SecurityToken> _tokens;

    public Saml2SSOSecurityTokenResolver(List<SecurityToken> tokens)
    {
        _tokens = tokens;
    }
    protected override bool TryResolveSecurityKeyCore(System.IdentityModel.Tokens.SecurityKeyIdentifierClause keyIdentifierClause, out System.IdentityModel.Tokens.SecurityKey key)
    {
        var token = _tokens[0] as X509SecurityToken;

        var myCert = token.Certificate;

        key = null;

        var ekec = keyIdentifierClause as EncryptedKeyIdentifierClause;

        if (ekec != null)
        {
            if (ekec.EncryptionMethod == "http://www.w3.org/2001/04/xmlenc#rsa-1_5")
            {
                var encKey = ekec.GetEncryptedKey();
                var rsa = myCert.PrivateKey as RSACryptoServiceProvider;
                var decKey = rsa.Decrypt(encKey, false);
                key = new InMemorySymmetricSecurityKey(decKey);
                return true;
            }

            var data = ekec.GetEncryptedKey();
            var id = ekec.EncryptingKeyIdentifier;
        }

        return true;
    }

    protected override bool TryResolveTokenCore(System.IdentityModel.Tokens.SecurityKeyIdentifierClause keyIdentifierClause, out System.IdentityModel.Tokens.SecurityToken token)
    {
        throw new NotImplementedException();
    }

    protected override bool TryResolveTokenCore(System.IdentityModel.Tokens.SecurityKeyIdentifier keyIdentifier, out System.IdentityModel.Tokens.SecurityToken token)
    {
        throw new NotImplementedException();
    }
}

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