I'm using haproxy 1.8.17 and openssl 1.1.1a from Debian testing to serve TLS 1.2 connections with client authentication.
In wireshark I observe the usual TLS messages:
- client->server: Client Hello
- server->client: Server Hello, Certificate, Server Key Exchange, Certificate Request, Server Hello Done
- client->server: Certificate, Client Key Exchange, Certificate Verify, Change Cipher Spec, Encrypted Handshake Message
Now HAProxy answers with: Alert (Level: Fatal, Description: Decrypt Error)
So my question is: what can cause this type of error?