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[Openvpn-devel,S] Change in openvpn[master]: generate_auth_token: simplify code

Message ID d1802dba96adfc0ad809a12a921885cb32a9d7dc-HTML@gerrit.openvpn.net
State Superseded
Headers show
Series [Openvpn-devel,S] Change in openvpn[master]: generate_auth_token: simplify code | expand

Commit Message

ordex (Code Review) Oct. 8, 2023, 10:42 a.m. UTC 
flichtenheld has uploaded this change for review. ( http://gerrit.openvpn.net/c/openvpn/+/310?usp=email )


Change subject: generate_auth_token: simplify code
......................................................................

generate_auth_token: simplify code

The previous code went through some hoops
to avoid compiler warnings. But there is
a much easier way by just telling it
exactly what you want to do.

Also fix typo in variable name while I'm
here.

Change-Id: Icc86334b26ba1fcc20f4cd03644018d1d16796e3
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
---
M src/openvpn/auth_token.c
1 file changed, 5 insertions(+), 11 deletions(-)



  git pull ssh://gerrit.openvpn.net:29418/openvpn refs/changes/10/310/2
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Patch

diff --git a/src/openvpn/auth_token.c b/src/openvpn/auth_token.c
index 6787ea7..28b58b0 100644
--- a/src/openvpn/auth_token.c
+++ b/src/openvpn/auth_token.c
@@ -182,24 +182,18 @@ 
         char *initial_token_copy = string_alloc(multi->auth_token_initial, &gc);
 
         char *old_sessid = initial_token_copy + strlen(SESSION_ID_PREFIX);
-        char *old_tsamp_initial = old_sessid + AUTH_TOKEN_SESSION_ID_LEN*8/6;
+        char *old_tstamp_initial = old_sessid + AUTH_TOKEN_SESSION_ID_LEN*8/6;
 
         /*
          * We null terminate the old token just after the session ID to let
          * our base64 decode function only decode the session ID
          */
-        old_tsamp_initial[12] = '\0';
-        ASSERT(openvpn_base64_decode(old_tsamp_initial, old_tstamp_decode, 9) == 9);
+        old_tstamp_initial[12] = '\0';
+        ASSERT(openvpn_base64_decode(old_tstamp_initial, old_tstamp_decode, 9) == 9);
 
-        /*
-         * Avoid old gcc (4.8.x) complaining about strict aliasing
-         * by using a temporary variable instead of doing it in one
-         * line
-         */
-        uint64_t *tstamp_ptr = (uint64_t *) old_tstamp_decode;
-        initial_timestamp = *tstamp_ptr;
+        memcpy(&initial_timestamp, &old_tstamp_decode, sizeof(initial_timestamp));
 
-        old_tsamp_initial[0] = '\0';
+        old_tstamp_initial[0] = '\0';
         ASSERT(openvpn_base64_decode(old_sessid, sessid, AUTH_TOKEN_SESSION_ID_LEN) == AUTH_TOKEN_SESSION_ID_LEN);
     }
     else if (!rand_bytes(sessid, AUTH_TOKEN_SESSION_ID_LEN))