aws s3 cpp sdk finning connection with minio after handshake wih tls 1.2

Question

I'm working with a MINIO server and AWS cpp SDK client. Everything works with HTTP, but after switching to HTTPS I'm getting "NETWORK CONNECTION" errors.
In Wireshark the connection is:

• client Hello
• server hello
• server sends Certificate , Server key exchange, Certificate Request, Server Hello Done
• client sends ack
• client sends FIN, ACK

When activating debug, aws logs the following error: WinHttpSyncHttpClient [54364] Send request failed: A certificate is required to complete client authentication

What works:

• AWS CLI to the MINIO (works with TLS 1.3 so the connection looks different)
• The same SDK with no SSL connection (when turning if off in MINIO as well).
• The same SDK works well with AWS S3 (with SSL).

What was tried and does not work:

• Turning "verifySSL" on and off
• Sending and not sending region
• Manually switching to HTTP 1.1

Does anyone have ideas on how to identify\solve the problem?

Answer 1

We managed to bypass the problem by switching to OpenSSL instead of WinHttpSyncHttpClient, by turning the relevant flag in AWS SDK CMake file.