Configurar certificado para comunicação FND para SSM

Introduction

Este documento descreve como configurar corretamente problemas de comunicação entre o Field Network Diretor (FND) e o Software Security Module (SSM).

Problema

Desde o FND 4.4, a comunicação entre o servidor de aplicativos FND e o serviço SSM requer autenticação mútua.

Se essa autenticação mútua não estiver configurada corretamente ou os certificados não corresponderem, a conexão do FND para o SSM será recusada. 

Isso pode ser visto em server.log, se o registro estiver definido como debug, como a seguir:

7645: SLC-FND: Jun 20 2019 13:22:49.929 +0000: %IOTFND-7-UNSPECIFIED: %[ch=SSMClient][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Sending request to SSM Server. Request :https://127.0.0.1:8445/api/v0/ssmws/loadKeyStore.json
7646: SLC-FND: Jun 20 2019 13:22:49.930 +0000: %IOTFND-7-UNSPECIFIED: %[ch=BasicClientConnectionManager][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Get connection for route {s}->https://127.0.0.1:8445
7647: SLC-FND: Jun 20 2019 13:22:49.931 +0000: %IOTFND-7-UNSPECIFIED: %[ch=DefaultClientConnectionOperator][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Connecting to 127.0.0.1:8445
7648: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=DefaultClientConnection][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Connection org.apache.http.impl.conn.DefaultClientConnection@370804ff closed
7649: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=DefaultClientConnection][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Connection org.apache.http.impl.conn.DefaultClientConnection@370804ff shut down
7650: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=BasicClientConnectionManager][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Releasing connection org.apache.http.impl.conn.ManagedClientConnectionImpl@7bc2e02f
7651: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=BasicClientConnectionManager][sev=DEBUG][tid=http-/0.0.0.0:443-5]: Connection can be kept alive for 9223372036854775807 MILLISECONDS
7652: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=SSMClient][sev=DEBUG][tid=http-/0.0.0.0:443-5][part=7652.1/114]: Please verify SSM server status. No response received.
7653: SLC-FND: Jun 20 2019 13:22:49.938 +0000: %IOTFND-7-UNSPECIFIED: %[ch=SSMClient][sev=DEBUG][tid=http-/0.0.0.0:443-5][part=7652.2/114]: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated

Solução

O certificado usado pelo servidor FND para fazer a autenticação do cliente no servidor SSM é o certificado Web FND do jbossas_keystore. 

Para que o SSM confie neste certificado, você precisa passar por estas etapas:

1. Exporte o certificado da Web com o uso da GUI. Navegue até Admin > Gerenciamento do sistema > Certificados > Certificado para Web e clique em Download (base64) como mostrado na imagem.

2. Copie o arquivo de texto ou crie um novo arquivo no servidor FND com o conteúdo do certificado da Etapa 1. Para este exemplo, o arquivo é salvo em /opt/cgms/server/cgms/conf/webcert.crt:

[root@fndnms ~]# vi /opt/cgms/server/cgms/conf/webcert.crt
[root@fndnms ~]# cat /opt/cgms/server/cgms/conf/webcert.crt
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

3. Execute este comando para importar o certificado como confiável no ssm_web_keystore:

[root@fndnms ~]# keytool -import -trustcacerts -alias fnd -keystore /opt/cgms-ssm/conf/ssm_web_keystore -file /opt/cgms/server/cgms/conf/webcert.crt
Enter keystore password:
Owner: CN=CG-NMS, OU=IoTSSG, O=Cisco Systems, L=San Jose, ST=CA, C=US
Issuer: CN=CG-NMS, OU=IoTSSG, O=Cisco Systems, L=San Jose, ST=CA, C=US
Serial number: 1122fead
Valid from: Tue Mar 03 22:58:13 CET 2015 until: Sun Mar 01 22:58:13 CET 2020
Certificate fingerprints:
         MD5:  6D:63:B9:8B:3F:C5:E9:6B:2B:DD:77:30:55:9D:C6:E7
         SHA1: 5F:3B:84:92:06:22:CE:C4:FA:8B:F0:46:65:4B:CE:74:61:AA:3B:AE
         SHA256: 1C:59:50:40:92:09:66:D3:67:E9:AE:CA:6D:C8:25:88:FF:A8:26:F7:62:8A:13:EB:0E:EC:57:32:DB:03:94:31
         Signature algorithm name: SHA256withRSA
         Version: 3

Extensions:

#1: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 7F 21 68 0E 3D 21 24 BB   54 BB A6 6D 28 21 EE 8A  .!h.=!$.T..m(!..
0010: C0 90 7E 5E                                        ...^
]
]

Trust this certificate? [no]:  yes
Certificate was added to keystore

4. Depois que o certificado tiver sido importado, reinicie o serviço SSM:

[root@fndnms ~]# systemctl restart ssm
[root@fndnms ~]# systemctl status ssm
● ssm.service - (null)
   Loaded: loaded (/etc/rc.d/init.d/ssm; bad; vendor preset: disabled)
   Active: active (running) since Thu 2019-06-20 17:44:11 CEST; 5s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 11463 ExecStop=/etc/rc.d/init.d/ssm stop (code=exited, status=0/SUCCESS)
  Process: 11477 ExecStart=/etc/rc.d/init.d/ssm start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/ssm.service
           └─11485 java -server -Xms128m -Xmx1g -XX:MaxPermSize=256m -server -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt/cgms-ssm/log -XX:-OmitStackTraceInFastThrow -Dbase.dir=/opt/cgms-ssm -Dlog4j...

Jun 20 17:44:10 fndnms systemd[1]: Starting (null)...
Jun 20 17:44:11 fndnms ssm[11477]: Starting Software Security Module Server: [  OK  ]
Jun 20 17:44:11 fndnms systemd[1]: Started (null).

Você pode verificar se o FND é capaz de se comunicar com o SSM. Navegue até Admin > Certificados > Certificado para CSMP na GUI do FND.

Se tudo correr bem, você poderá ver o certificado CSMP no SSM como mostrado na imagem.