winrm - Add explicit env vars to pass into kinit (#75256)

* winrm - Add explicit env vars to pass into kinit

* Add ini entry and don't override existing env vars

changelogs/fragments/winrm-kinit-env.yml

@@ -0,0 +1,2 @@
+minor_changes:
+- winrm - Allow explicit environment variables to be passed through to the ``kinit`` call for Kerberos authentication

lib/ansible/plugins/connection/winrm.py

@@ -92,6 +92,21 @@ DOCUMENTATION = """
         vars:
           - name: ansible_winrm_kinit_args
         version_added: '2.11'
+      kinit_env_vars:
+        description:
+        - A list of environment variables to pass through to C(kinit) when getting the Kerberos authentication ticket.
+        - By default no environment variables are passed through and C(kinit) is run with a blank slate.
+        - The environment variable C(KRB5CCNAME) cannot be specified here as it's used to store the temp Kerberos
+          ticket used by WinRM.
+        type: list
+        elements: str
+        default: []
+        ini:
+        - section: winrm
+          key: kinit_env_vars
+        vars:
+          - name: ansible_winrm_kinit_env_vars
+        version_added: '2.12'
       kerberos_mode:
         description:
             - kerberos usage mode.
@@ -306,6 +321,12 @@ class Connection(ConnectionBase):
         os.environ["KRB5CCNAME"] = krb5ccname
         krb5env = dict(KRB5CCNAME=krb5ccname)
 
+        # Add any explicit environment vars into the krb5env block
+        kinit_env_vars = self.get_option('kinit_env_vars')
+        for var in kinit_env_vars:
+            if var not in krb5env and var in os.environ:
+                krb5env[var] = os.environ[var]
+
         # Stores various flags to call with kinit, these could be explicit args set by 'ansible_winrm_kinit_args' OR
         # '-f' if kerberos delegation is requested (ansible_winrm_kerberos_delegation).
         kinit_cmdline = [self._kinit_cmd]