[pbs-devel] [PATCH proxmox{, -websocket-tunnel, -backup} 0/5] unify openssl callback logic

[Dominik Csapak]

There are currently 3 slightly different implementations of the openssl
verify callback in place. They differ in how an explicit fingerprint
would be checked:

* pbs-client: if verification was on, a valid certificate would trump a
  wrong epxlicit fingerprint
* proxmox-websocket-tunnel: if an explicit fingerprint was given, it was
  checked, regardless of the openssl result
* proxmox-client: the openssl validity had priority as in pbs-client,
  but the fingerprint was not checked against the leaf certificate, but
  agains all certificates in the chain (which would lead to false
  negatives). Note that this is currently only used in PDM

This series aims to unify the general behavior, but design the interface
to be flexible enought to accomodate the different call sites needs.

I included the change of features for crates, but they have to be bumped
before hand of course and the version must be changed in Cargo.toml.

(if I should send that differently, please do tell how it should be done)

Since that is technically a breaking change for PBS, we should only
change that for the next major release.

Also, since it rather deep in the stack for PBS (remotes sync, etc.) and
PVE (remote migration) IMHO this is a series that should be tested very
well.

Further work could be to unify this behavior for our perl clients too,
but it seemed out of scope for this series. (notably the PVE::APIClient
and the client used in the SDN code)

I tried to implement some tests, but due to the openssl interface this
seems to be not really possible, except if we'd start a server + client
in the tests (which seems overkill). But if anyone has an idea how we
could test this code (and i mean not only it's interface, but the
openssl connection behavior), I'd be glad.

I sent the patch to the pbs-devel list, but actually it affects PBS, PVE
and PDM.

patch 1/2 of the websocket-tunnel, is not really related, but was
necessary to build.

proxmox:

Dominik Csapak (2):
  http: factor out openssl verification callback
  client: use proxmox-http's openssl verification callback

 Cargo.toml                   |  1 +
 proxmox-client/Cargo.toml    |  2 +-
 proxmox-client/src/client.rs | 48 ++++---------------
 proxmox-http/Cargo.toml      |  7 +++
 proxmox-http/src/lib.rs      |  5 ++
 proxmox-http/src/tls.rs      | 89 ++++++++++++++++++++++++++++++++++++
 proxmox-openid/Cargo.toml    |  2 +-
 7 files changed, 112 insertions(+), 42 deletions(-)
 create mode 100644 proxmox-http/src/tls.rs


proxmox-websocket-tunnel:

Dominik Csapak (2):
  update base64 dependency
  use proxmox-http's openssl callback

 Cargo.toml  |  5 ++--
 src/main.rs | 66 ++++++++++++++++++++++-------------------------------
 2 files changed, 29 insertions(+), 42 deletions(-)


proxmox-backup:

Dominik Csapak (1):
  pbs-client: use proxmox-https openssl callback

 Cargo.toml                    |   2 +-
 pbs-client/src/http_client.rs | 151 ++++++++++++++--------------------
 2 files changed, 62 insertions(+), 91 deletions(-)


Summary over all repositories:
  11 files changed, 203 insertions(+), 175 deletions(-)

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