[openssl-users] A self-signed CA certificate in the CA file *sometimes* stops verification working

[John Unsworth]

OpenSSL 1.0.2h on Windows (different versions).

I have noticed the following behaviour:

1 Create a certificate file with two CA certificates, one for the server being connected to (server A) and one for another server (server B).
2 Whichever way the CA certificates are ordered the connect works OK.
3 Add a self-signed CA certificate in the file before the one for server A. The connect fails 'Verify return code: 21 (unable to verify the first certificate)'.
4 Move the self-signed CA certificate after the one for server A. The connect works OK.

Why should the self-signed certificate affect the connection when the required CA certificate is in the certificate file? Is this a bug?


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