- NAME
- SYNOPSIS
- DESCRIPTION
- NOTES
- EXAMPLES
- RETURN VALUES
- SEE ALSO

# 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, 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, SSL_CTX_set_client_CA_list