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SSL_load_client_CA_file(3) OpenSSL SSL_load_client_CA_file(3) NAME SSL_load_client_CA_file - load certificate names from file LIBRARY libcrypto, -lcrypto 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 */ ... 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(7), SSL_CTX_set_client_CA_list(3) COPYRIGHT Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>. 1.1.1 2018-09-17 SSL_load_client_CA_file(3)