[Openvpn-devel,v3] Fix OpenVPN querying user/password if auth-token with user expires

Message ID 20220217182234.33850-1-arne@rfc2549.org
State New
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  • [Openvpn-devel,v3] Fix OpenVPN querying user/password if auth-token with user expires
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Commit Message

Arne Schwabe Feb. 17, 2022, 6:22 p.m.
The problematic behaviour happens when start a profile without
auth-user-pass and connect to a server that pushes auth-token
When the auth token expires OpenVPN asks for auth User and password

The problem is that the auth_user_pass_setup sets
auth_user_pass_enabled = true; This function is called from two places.
In ssl.c it is only called with an auth-token present or that
variable already set. The other one is init_query_passwords.

Move setting auth_user_pass_enabled to the second place to ensure it is
only set if we really want passwords.

Patch v2: Remove unrelated code change
Patch v3: Rebase to master

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
 src/openvpn/init.c | 1 +
 src/openvpn/ssl.c  | 7 ++++++-
 src/openvpn/ssl.h  | 3 +++
 3 files changed, 10 insertions(+), 1 deletion(-)


diff --git a/src/openvpn/init.c b/src/openvpn/init.c
index 21adc3cf..e5fba621 100644
--- a/src/openvpn/init.c
+++ b/src/openvpn/init.c
@@ -590,6 +590,7 @@  init_query_passwords(const struct context *c)
     /* Auth user/pass input */
     if (c->options.auth_user_pass_file)
+        enable_auth_user_pass();
         auth_user_pass_setup(c->options.auth_user_pass_file, &c->options.sc_info);
diff --git a/src/openvpn/ssl.c b/src/openvpn/ssl.c
index 14a943a7..b68708b0 100644
--- a/src/openvpn/ssl.c
+++ b/src/openvpn/ssl.c
@@ -398,9 +398,14 @@  static char *auth_challenge; /* GLOBAL */
-auth_user_pass_setup(const char *auth_file, const struct static_challenge_info *sci)
     auth_user_pass_enabled = true;
+auth_user_pass_setup(const char *auth_file, const struct static_challenge_info *sci)
     if (!auth_user_pass.defined && !auth_token.defined)
diff --git a/src/openvpn/ssl.h b/src/openvpn/ssl.h
index cf754ad2..76d8a7dc 100644
--- a/src/openvpn/ssl.h
+++ b/src/openvpn/ssl.h
@@ -436,6 +436,9 @@  void tls_post_encrypt(struct tls_multi *multi, struct buffer *buf);
 void pem_password_setup(const char *auth_file);
+/* Enables the use of user/password authentication */
+void enable_auth_user_pass();
  * Setup authentication username and password. If auth_file is given, use the
  * credentials stored in the file.