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fix #3391: improve mismatched fingerprint handling

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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>
This commit is contained in:
Fabian Grünbichler
2021-05-10 10:52:31 +02:00
committed by Thomas Lamprecht
parent 68b102269f
commit dda1b4fa44
1 changed files with 4 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/client/http_client.rs
View File

@ -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);
}
}