Is it possible to set the BODY of a CA file in cURL?

Question

Digital certificates

There is an accounting program. It creates self-signed TLS certificates in PEM format (each server has its own).
To set the path to this file, cURL has the CURLOPT_CAINFO option.
It so happened that a) this PEM stores both the public and private parts of the certificate, while we only need the public part; b) due to the fact that each server has its own certificate, it will have to be stored in a data file, and not in Program Files along with the program. Is it possible to pass this public part to cURL without unpacking it into a temporary file?