Add pki_pin only when needed

If both the pki-tomcat NSS database and its password.conf have been
created, don't try to override the password.conf file.

https://pagure.io/freeipa/issue/6839

Reviewed-By: Tomas Krizek <tkrizek@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

ipaserver/install/cainstance.py

@@ -541,9 +541,13 @@ class CAInstance(DogtagInstance):
         # CA key algorithm
         config.set("CA", "pki_ca_signing_key_algorithm", self.ca_signing_algorithm)
 
-        # generate pin which we know can be used for FIPS NSS database
-        pki_pin = ipautil.ipa_generate_password()
-        config.set("CA", "pki_pin", pki_pin)
+        if not (os.path.isdir(paths.PKI_TOMCAT_ALIAS_DIR) and
+                os.path.isfile(paths.PKI_TOMCAT_PASSWORD_CONF)):
+            # generate pin which we know can be used for FIPS NSS database
+            pki_pin = ipautil.ipa_generate_password()
+            config.set("CA", "pki_pin", pki_pin)
+        else:
+            pki_pin = None
 
         if self.clone:
 

ipaserver/install/krainstance.py

@@ -235,9 +235,13 @@ class KRAInstance(DogtagInstance):
             "KRA", "pki_share_dbuser_dn",
             str(DN(('uid', 'pkidbuser'), ('ou', 'people'), ('o', 'ipaca'))))
 
-        # generate pin which we know can be used for FIPS NSS database
-        pki_pin = ipautil.ipa_generate_password()
-        config.set("KRA", "pki_pin", pki_pin)
+        if not (os.path.isdir(paths.PKI_TOMCAT_ALIAS_DIR) and
+                os.path.isfile(paths.PKI_TOMCAT_PASSWORD_CONF)):
+            # generate pin which we know can be used for FIPS NSS database
+            pki_pin = ipautil.ipa_generate_password()
+            config.set("KRA", "pki_pin", pki_pin)
+        else:
+            pki_pin = None
 
         _p12_tmpfile_handle, p12_tmpfile_name = tempfile.mkstemp(dir=paths.TMP)