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Keycloak x.509 憑證認證

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Keycloak x.509 憑證認證

我正在嘗試建立以下架構，但我很掙扎：

  • 帶有此圖像的 Keycloak 容器 jboss/keycloak:7.0.0

  • Apache 與 mod_auth_openidc

  • apache 有一個受保護的目錄

  • Apache 進行 SSL 用戶端身份驗證

我想配置以下場景：

  • 使用者造訪我的網站/演示

  • Apache 提示他使用他的憑證進行身份驗證

  • Apache 將訊息轉送到 keycloak

  • Keycloak使用X509/Validate Username驗證憑證（CN）

  • 通過身份驗證後將資源傳回給用戶

我有以下 Apache vhost 設定：

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>

對於 keycloak 容器，如果我安裝它而不是預設容器，我不確定容器是否會考慮我的standalone.xml，因此我執行了以下 jboss 命令：

   /subsystem=keycloak-server/spi=x509cert-lookup:write-attribute(name=default-provider, value="apache")
   /subsystem=keycloak-server/spi=x509cert-lookup/provider=apache:write-attribute(name=properties.sslClientCert,value="SSL_CLIENT_CERT")
   /subsystem=keycloak-server/spi=x509cert-lookup/provider=apache:write-attribute(name=properties.sslCertChainPrefix,value="CERT_CHAIN")
   /subsystem=keycloak-server/spi=x509cert-lookup/provider=apache:write-attribute(name=properties.certificateChainLength,value="10")
   ：重新加載

我的 keycloak 配置如下：客戶端重定向：

客戶端重定向

以及身分驗證流程：

執行

配置執行驗證器

但是，當我訪問該網站時，作為具有證書 CN“Team XYZ”的用戶“Team XYZ”，我收到此錯誤： {"error_description":"X509 client certificate is missing.","error":"invalid_request"}

鑰匙斗篷日誌：

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

有人可以幫助我嗎，我已經被這個問題困擾好幾天了。

答案1

在 kubernetes 環境中，以下解決方案有效

      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 是從 kustomization.yaml 產生的

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

其中 tls.crt、tls.key、c​​​​a.crt 是我自己的自簽名證書，CA 證書用於 keycloak X509 授權，而我的 nginx 使用的是 let's encrypt 證書。
然後在啟動時使用以下 cli 檔案更新 keycloak 設定檔standalone.xml 或standalone-ha.xml

/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"})

您也可以使用動態變更 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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