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+.\" ======================================================================
+.\"
+.IX Title "SSL_LOAD_CLIENT_CA_FILE 1"
+.TH SSL_LOAD_CLIENT_CA_FILE 1 "perl v5.6.1" "2001-02-18" "User Contributed Perl Documentation"
+.UC
+.SH "NAME"
+SSL_load_client_CA_file \- load certificate names from file
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/ssl.h>
+.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)
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