From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <f.gruenbichler@proxmox.com>
Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256)
 (No client certificate requested)
 by lists.proxmox.com (Postfix) with ESMTPS id DAD237A9F5
 for <pbs-devel@lists.proxmox.com>; Mon, 10 May 2021 10:52:41 +0200 (CEST)
Received: from firstgate.proxmox.com (localhost [127.0.0.1])
 by firstgate.proxmox.com (Proxmox) with ESMTP id C8D0F15837
 for <pbs-devel@lists.proxmox.com>; Mon, 10 May 2021 10:52:41 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com
 [94.136.29.106])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256)
 (No client certificate requested)
 by firstgate.proxmox.com (Proxmox) with ESMTPS id 3E1411582B
 for <pbs-devel@lists.proxmox.com>; Mon, 10 May 2021 10:52:41 +0200 (CEST)
Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1])
 by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 0F4B3443F1
 for <pbs-devel@lists.proxmox.com>; Mon, 10 May 2021 10:52:41 +0200 (CEST)
From: =?UTF-8?q?Fabian=20Gr=C3=BCnbichler?= <f.gruenbichler@proxmox.com>
To: pbs-devel@lists.proxmox.com
Date: Mon, 10 May 2021 10:52:31 +0200
Message-Id: <20210510085234.775062-1-f.gruenbichler@proxmox.com>
X-Mailer: git-send-email 2.20.1
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-SPAM-LEVEL: Spam detection results:  0
 AWL 0.020 Adjusted score from AWL reputation of From: address
 KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment
 SPF_HELO_NONE           0.001 SPF: HELO does not publish an SPF Record
 SPF_PASS               -0.001 SPF: sender matches SPF record
Subject: [pbs-devel] [PATCH proxmox-backup 1/4] fix #3391: improve
 mismatched fingerprint handling
X-BeenThere: pbs-devel@lists.proxmox.com
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Proxmox Backup Server development discussion
 <pbs-devel.lists.proxmox.com>
List-Unsubscribe: <https://lists.proxmox.com/cgi-bin/mailman/options/pbs-devel>, 
 <mailto:pbs-devel-request@lists.proxmox.com?subject=unsubscribe>
List-Archive: <http://lists.proxmox.com/pipermail/pbs-devel/>
List-Post: <mailto:pbs-devel@lists.proxmox.com>
List-Help: <mailto:pbs-devel-request@lists.proxmox.com?subject=help>
List-Subscribe: <https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel>, 
 <mailto:pbs-devel-request@lists.proxmox.com?subject=subscribe>
X-List-Received-Date: Mon, 10 May 2021 08:52:41 -0000

if the expected fingerprint and the one returned by the server don't
match, print a warning and allow confirmation and proceeding if running
interactive.

previous:

$ proxmox-backup-client ...
Error: error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:../ssl/statem/statem_clnt.c:1915:

new:

$ proxmox-backup-client ...
WARNING: certificate fingerprint does not match expected fingerprint!
expected:    ac:cb:6a:bc:d6:b7:b4:77:3e:17:05:d6:b6:29:dd:1f:05:9c:2b:3a:df:84:3b:4d:f9:06:2c:be:da:06:52:12
fingerprint: ab:cb:6a:bc:d6:b7:b4:77:3e:17:05:d6:b6:29:dd:1f:05:9c:2b:3a:df:84:3b:4d:f9:06:2c:be:da:06:52:12
Are you sure you want to continue connecting? (y/n): n
Error: error trying to connect: error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:../ssl/statem/statem_clnt.c:1915:

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
 src/client/http_client.rs | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/client/http_client.rs b/src/client/http_client.rs
index c8d1f743..1df22dc9 100644
--- a/src/client/http_client.rs
+++ b/src/client/http_client.rs
@@ -498,10 +498,12 @@ impl HttpClient {
             .collect::<Vec<&str>>().join(":");
 
         if let Some(expected_fingerprint) = expected_fingerprint {
-            if expected_fingerprint.to_lowercase() == fp_string {
+            let expected_fingerprint = expected_fingerprint.to_lowercase();
+            if expected_fingerprint == fp_string {
                 return (true, Some(fp_string));
             } else {
-                return (false, None);
+                eprintln!("WARNING: certificate fingerprint does not match expected fingerprint!");
+                eprintln!("expected:    {}", expected_fingerprint);
             }
         }
 
-- 
2.20.1