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Keycloak x.509 证书认证

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Keycloak x.509 证书认证

我正在尝试建立以下架构，但很困难：

  • 带有此图像 jboss/keycloak:7.0.0 的 Keycloak 容器

  • 带有 mod_auth_openidc 的 Apache

  • apache 有一个受保护的目录

  • Apache 有一个 SSL 客户端 Authent

我想要配置以下场景：

  • 用户访问 mywebsite/demo

  • Apache 提示他使用证书进行身份验证

  • Apache 将信息转发给 keycloak

  • Keycloak 使用 X509/Validate Username 来验证证书（CN）

  • 验证通过后将资源返回给用户

我对 Apache vhost 有以下配置：

Listen 8081 https
<VirtualHost *:8081>

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html/

        SSLEngine on
        SSLCipherSuite HIGH
        SSLProtocol all -SSLv3 -TLSv1.3


        SSLCertificateFile /etc/apache2/ssl/serv.crt
        SSLCertificateKeyFile /etc/apache2/ssl/serv.key
        SSLCACertificateFile /etc/apache2/ssl/ca.crt

        <Location /pdf >
                ProxyPass http://mywebsite:5001/pdf
                ProxyPassReverse http://mywebsite:5001/pdf
        </Location>
        #RequestHeader set CERT_CHAIN ""
        RequestHeader set  SSL_CLIENT_CERT ""


        OIDCCryptoPassphrase passphrase
        OIDCProviderMetadataURL https://mywebsite:9004/auth/realms/demorealm/.well-known/openid-configuration
        OIDCClientID demo2
        OIDCClientSecret e6dc781f-49c0-4cfa-9cde-411f9d8bc2cb
        OIDCSSLValidateServer Off
        OIDCRedirectURI https://mywebsite:9998/demo2/redirect
        OIDCRemoteUserClaim preferred_username
        OIDCInfoHook access_token id_token userinfo session


        <Location /demo2 >

                SSLVerifyClient require
                SSLVerifyDepth 2
                #RequestHeader set SSL_CLIENT_CERT_CHAIN_0 "%{{CERT_CHAIN}}s"
                RequestHeader set SSL_CLIENT_CERT "%{SSL_CLIENT_CERT}s"
                #Require ssl


                AuthType openid-connect
                Require valid-user
                Loglevel debug
        </Location>

</VirtualHost>

对于 keycloak 容器，我不确定如果我安装它而不是默认容器是否会考虑我的 standalone.xml，因此我执行了以下 jboss 命令：

   /子系统 = keycloak 服务器 / spi = x509cert-lookup:写入属性 (名称 = 默认提供程序，值 =“apache”)
   /子系统=keycloak服务器/spi=x509cert-lookup/provider=apache:write-attribute(name=properties.sslClientCert，value="SSL_CLIENT_CERT")
   /子系统 = keycloak 服务器 /spi = x509cert-lookup/provider = apache: write-attribute (name = properties.sslCertChainPrefix，value =“CERT_CHAIN”)
   /子系统 = keycloak 服务器 /spi = x509cert-lookup/provider = apache: write-attribute (name = properties.certificateChainLength，值 =“10”)
   :重新加载

我的 keycloak 配置如下：客户端重定向：

客户端重定向

身份验证流程：

执行

配置执行验证器

但是当我以用户“Team XYZ”和证书 CN“Team XYZ”的身份访问该网站时，出现此错误： {"error_description":"X509 client certificate is missing.","error":"invalid_request"}

Keycloak 日志：

21:10:24,178 WARN  [org.keycloak.services.x509.AbstractClientCertificateFromHttpHeadersLookup] (default task-49) HTTP header "SSL_CLIENT_CERT" is empty

20:09:48,062 WARN  [org.keycloak.events] (default task-9) type=LOGIN_ERROR, realmId=5c005f6f-a912-4788-bf53-345551eb0e01, clientId=demo2, userId=null, ipAddress=Dummy, error=user_not_found, auth_method=openid-connect, auth_type=code, response_type=code, redirect_uri=https://mywebsite:9998/demo2/redirect, code_id=d2b3aecf-0a53-4d3a-85fd-3433aee61d61, response_mode=query, authSessionParentId=d2b3aecf-0a53-4d3a-85fd-3433aee61d61, authSessionTabId=FqOsf6BrEBk

有人可以帮帮我吗，我已经被这个问题困扰好几天了。

答案1

在 kubernetes 环境中，以下解决方案有效

      nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
      nginx.ingress.kubernetes.io/proxy-ssl-secret: "mynamespace/backend-x509-secret"
      nginx.ingress.kubernetes.io/proxy-ssl-verify: "on"
      nginx.ingress.kubernetes.io/proxy-ssl-verify-depth: "2"

      nginx.ingress.kubernetes.io/auth-tls-secret: "mynamespace/backend-x509-secret"
      nginx.ingress.kubernetes.io/auth-tls-verify-client: "optional"
      nginx.ingress.kubernetes.io/auth-tls-verify-depth: "2"
      nginx.ingress.kubernetes.io/auth-tls-pass-certificate-to-upstream: "true"

其中 mynamespace/backend-x509-secret 是从 kustomization.yaml 生成的

secretGenerator:
- name: backend-x509-secret
  files:
  - tls.crt
  - tls.key
  - ca.crt

其中 tls.crt、tls.key、c​​a.crt 是我自己签名的，CA 证书用于 keycloak X509 授权，而我的 nginx 使用的是 let's encrypt 证书。
然后 keycloak 配置文件 standalone.xml 或 standalone-ha.xml 在启动时使用以下 cli 文件进行更新

/subsystem=keycloak-server/spi=x509cert-lookup:write-attribute(name=default-provider, value="nginx")            
/subsystem=keycloak-server/spi=x509cert-lookup/provider=default:remove
/subsystem=keycloak-server/spi=x509cert-lookup/provider=nginx:add(enabled=true,properties={sslClientCert => "ssl-client-cert", sslCertChainPrefix => "USELESS",     certificateChainLength => "2"})

你也可以使用以下方法动态更改 keycloak 配置

$JBOSS_HOME/bin/jboss-cli.sh --connect --command='/subsystem=keycloak-server/spi=x509cert-lookup:write-attribute(name=default-provider, value="nginx")'            
$JBOSS_HOME/bin/jboss-cli.sh --connect --command='/subsystem=keycloak-server/spi=x509cert-lookup/provider=default:remove'
$JBOSS_HOME/bin/jboss-cli.sh --connect --command='/subsystem=keycloak-server/spi=x509cert-lookup/provider=nginx:add(enabled=true,properties={ sslClientCert => "ssl-client-cert", sslCertChainPrefix => "USELESS", certificateChainLength => "2"})'           
$JBOSS_HOME/bin/jboss-cli.sh --connect --command=':reload'

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