suse man page for ssl_load_client_ca_file

SSL_load_client_CA_file(3SSL)                                         OpenSSL                                        SSL_load_client_CA_file(3SSL)

NAME
       SSL_load_client_CA_file - load certificate names from file

SYNOPSIS
        #include <openssl/ssl.h>

        STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);

DESCRIPTION
       SSL_load_client_CA_file() reads certificates from file and returns a STACK_OF(X509_NAME) with the subject names found.

NOTES
       SSL_load_client_CA_file() reads a file of PEM formatted certificates and extracts the X509_NAMES of the certificates found. While the name
       suggests the specific usage as support function for SSL_CTX_set_client_CA_list(3), it is not limited to CA certificates.

EXAMPLES
       Load names of CAs from file and use it as a client CA list:

        SSL_CTX *ctx;
        STACK_OF(X509_NAME) *cert_names;

        ...
        cert_names = SSL_load_client_CA_file("/path/to/CAfile.pem");
        if (cert_names != NULL)
          SSL_CTX_set_client_CA_list(ctx, cert_names);
        else
          error_handling();
        ...

RETURN VALUES
       The following return values can occur:

       NULL
           The operation failed, check out the error stack for the reason.

       Pointer to STACK_OF(X509_NAME)
           Pointer to the subject names of the successfully read certificates.

SEE ALSO
       ssl(3), SSL_CTX_set_client_CA_list(3)

1.0.1e                                                              2013-02-11                                       SSL_load_client_CA_file(3SSL)