我想使用基于TLSv1.2和.NET Framework 4.5.2或4.6.2的LDAP来查询ActiveDirectory(但两者都有问题)。问题是它一直试图使用TLSv1.0,即使我使用“ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12”。使用c#和TLSv1.2连接到LDAP
“System.DirectoryServices.Protocols”是一个我可以用来通过TLSv1.2查询LDAP的软件包吗?如果是这样,那么启用该TLS版本的正确方法是什么?
最后,我想从一个Web API 2控制器做到这一点,但作为一个简单的测试再现这个问题,我有以下控制台应用程序:
using System;
using System.Diagnostics;
using System.DirectoryServices.Protocols;
using System.Net;
namespace Ldap
{
class Program
{
private const string ldapHost = "169.254.212.120";
private const int ldapPort = 30389; // normally just 389
private const int ldapSslPort = 30636; // normally just 636
private const bool sslEnabled = true;
private const string userBaseDistinguishedName = "dc=example,dc=org";
private const string bindUserCommonName = "admin";
private const string bindUserDistinguishedName = "cn=admin,dc=example,dc=org";
private const string bindUserPassword = "admin";
static void Main(string[] args)
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
using (LdapConnection connection = CreateConnection())
{
try
{
connection.Bind();
}
catch (Exception e)
{
Debug.WriteLine(e.Message);
}
}
}
private static LdapConnection CreateConnection()
{
var directoryIdentifier = new LdapDirectoryIdentifier(ldapHost,
sslEnabled ? ldapSslPort : ldapPort, true, false);
var credential = new NetworkCredential(bindUserDistinguishedName, bindUserPassword);
var conn = new LdapConnection(directoryIdentifier, credential, AuthType.Basic);
conn.SessionOptions.SecureSocketLayer = sslEnabled;
conn.SessionOptions.ProtocolVersion = 3; // Use LDAPv3 (otherwise it appears to default to LDAPv2)
return conn;
}
}
}
对于服务器,我测试这使用OpenLdap docker容器(端口30389和30636暴露,而不是标准端口),尽管最终这个代码将用于连接&查询ActiveDirectory。
站起测试LDAP服务器,我碰巧使用(多克17.06 CE):
docker run --name test_ldap -p 0.0.0.0:30636:636 -p 0.0.0.0:30389:389 --env LDAP_TLS_CIPHER_SUITE="SECURE256:+SECURE128:-VERS-TLS-ALL:+VERS-TLS1.2:-RSA:-DHE-DSS:-CAMELLIA-128-CBC:-CAMELLIA-256-CBC" --env LDAP_TLS_VERIFY_CLIENT="allow" --hostname example.org --detach osixia/openldap:1.1.7
同时运行Wireshark的:在Wireshark的可见交通表明,“版本”的“客户端内你好“数据包是”TLS 1.0(0x0301)“。
开放的LDAP服务器秀中的日志:
59810624 conn=1002 fd=16 ACCEPT from IP=172.17.0.1:44606 (IP=0.0.0.0:636)
TLS: can't accept: An unknown public key algorithm was encountered..
59810624 conn=1002 fd=16 closed (TLS negotiation failure)
我猜你可能已经看过这个http://blogs.perficient.com/microsoft/2016/04/ tsl-1-2-and-net-support /但是,如果你没有 –
是的,我看过那个和其他人喜欢它。我已经尝试了TLS1.2应该工作的版本(.NET 4.6.2),并且还尝试了4.5解决方法“ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12”。这两种方法似乎都不适用于LDAP。 –