NetBSD/lib/libcrypto/man/SSL_load_client_CA_file.3

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.\" $NetBSD: SSL_load_client_CA_file.3,v 1.2 2002/02/07 07:00:42 ross Exp $
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.\" ======================================================================
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.IX Title "SSL_load_client_CA_file 3"
.TH SSL_load_client_CA_file 3 "0.9.6a" "2001-04-12" "OpenSSL"
.UC
.SH "NAME"
SSL_load_client_CA_file \- load certificate names from file
.SH "LIBRARY"
libcrypto, -lcrypto
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include \*[Lt]openssl/ssl.h\*[Gt]
.Ve
.Vb 1
\& STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_load_client_CA_file()\fR reads certificates from \fBfile\fR and returns
a STACK_OF(X509_NAME) with the subject names found.
.SH "NOTES"
.IX Header "NOTES"
\&\fISSL_load_client_CA_file()\fR reads a file of \s-1PEM\s0 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 \s-1CA\s0 certificates.
.SH "EXAMPLES"
.IX Header "EXAMPLES"
Load names of CAs from file and use it as a client \s-1CA\s0 list:
.PP
.Vb 2
\& SSL_CTX *ctx;
\& STACK_OF(X509_NAME) *cert_names;
.Ve
.Vb 7
\& ...
\& 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();
\& ...
.Ve
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The following return values can occur:
.Ip "\s-1NULL\s0" 4
.IX Item "NULL"
The operation failed, check out the error stack for the reason.
.Ip "Pointer to STACK_OF(X509_NAME)" 4
.IX Item "Pointer to STACK_OF(X509_NAME)"
Pointer to the subject names of the successfully read certificates.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
ssl(3),
SSL_CTX_set_client_CA_list(3)