[OpenSIPS-Devel] [OpenSIPS/opensips] fb847b: proto_ws: decline Sec-WebSocket-Key keys that are ...

[Răzvan Crainea]

  Branch: refs/heads/2.4
  Home:   https://github.com/OpenSIPS/opensips
  Commit: fb847ba4420c88d608feefa80849f8a985f5ac27
      https://github.com/OpenSIPS/opensips/commit/fb847ba4420c88d608feefa80849f8a985f5ac27
  Author: Razvan Crainea <razvan at opensips.org>
  Date:   2020-01-08 (Wed, 08 Jan 2020)

  Changed paths:
    M modules/proto_ws/ws_handshake_common.h

  Log Message:
  -----------
  proto_ws: decline Sec-WebSocket-Key keys that are not 24 bytes

In case the key is not 24 bytes, the some internal buffers might be
overwritten, resulting in malformed/bad Sec-WebSocket-Accept generation.
And since the RFC requires the key to be random 16-bytes-base64
encoding, the length should always be 24 bytes.

Thanks go to @hafkensite for reporting it on GitHub and to @wdoekes for
profiving the fix. Close #1928

(cherry picked from commit 6f24b26205d11a3500f86113cf74f7f7f4ec95e8)