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NetBSD 6.1.5 - man page for ssl_load_client_ca_file (netbsd section 3)

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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_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)

1.0.1i					    2009-07-20		       SSL_load_client_CA_file(3)
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