[_621] add functions to write .irodsA

Author: d-w-moore

irods/client_init.py

@@ -0,0 +1,33 @@
+import irods.client_configuration as cfg
+import irods.password_obfuscation as obf
+import irods.helpers as h
+import getpass
+import sys
+
+def write_credentials_with_native_password( password ):
+    s = h.make_session()
+    assert(not s.auth_file)
+    open(s.pool.account.derived_auth_file,'w').write(obf.encode(password))
+    return True
+
+def write_credentials_with_pam_password( password ):
+    s = h.make_session()
+    assert(not s.auth_file)
+    s.pool.account.password = password
+    with cfg.loadlines( [dict(setting='legacy_auth.pam.password_for_auto_renew',value='')] ):
+        to_encode = s.pam_pw_negotiated
+    if to_encode:
+        open(s.pool.account.derived_auth_file,'w').write(obf.encode(to_encode[0]))
+        return True
+    return False
+
+if __name__ == '__main__':
+    vector = {
+        'pam': write_credentials_with_pam_password,
+        'native': write_credentials_with_native_password,
+    }
+
+    if sys.argv[1] in vector:
+        vector[sys.argv[1]](getpass.getpass(prompt=f'{sys.argv[1]} password: '))
+    else:
+        print('did not recognize authentication scheme argument',file = sys.stderr)