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CentOS 7.0 - man page for gnutls_x509_crt_get_authority_info_access (centos section 3)

gnutls_x509_crt_get_authority_info_access(3)		gnutls		 gnutls_x509_crt_get_authority_info_access(3)

gnutls_x509_crt_get_authority_info_access - API function
#include <gnutls/x509.h> int gnutls_x509_crt_get_authority_info_access(gnutls_x509_crt_t crt, unsigned int seq, int what, gnutls_datum_t * data, unsigned int * critical);
gnutls_x509_crt_t crt Holds the certificate unsigned int seq specifies the sequence number of the access descriptor (0 for the first one, 1 for the second etc.) int what what data to get, a gnutls_info_access_what_t type. gnutls_datum_t * data output data to be freed with gnutls_free(). unsigned int * critical pointer to output integer that is set to non-0 if the extension is marked as critical (may be NULL)
This function extracts the Authority Information Access (AIA) extension, see RFC 5280 section for more information. The AIA extension holds a sequence of AccessDescription (AD) data: <informalexample><programlisting> AuthorityInfoAccessSyntax ::= SEQUENCE SIZE (1..MAX) OF AccessDescription AccessDescription ::= SEQUENCE { accessMethod OBJECT IDENTIFIER, accessLocation GeneralName } </programlisting></informalexample> The seq input parameter is used to indicate which member of the sequence the caller is interested in. The first member is 0, the second member 1 and so on. When the seq value is out of bounds, GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned. The type of data returned in data is specified via what which should be gnutls_info_access_what_t values. If what is GNUTLS_IA_ACCESSMETHOD_OID then data will hold the accessMethod OID (e.g., ""). If what is GNUTLS_IA_ACCESSLOCATION_GENERALNAME_TYPE, data will hold the accessLocation GeneralName type (e.g., "uniformResourceIdentifier"). If what is GNUTLS_IA_URI, data will hold the accessLocation URI data. Requesting this what value leads to an error if the accessLocation is not of the "uniformResourceIdentifier" type. If what is GNUTLS_IA_OCSP_URI, data will hold the OCSP URI. Requesting this what value leads to an error if the accessMethod is not aka OSCP, or if accessLocation is not of the "uniformResourceI- dentifier" type. If what is GNUTLS_IA_CAISSUERS_URI, data will hold the caIssuers URI. Requesting this what value leads to an error if the accessMethod is not aka caIssuers, or if accessLocation is not of the "uni- formResourceIdentifier" type. More what values may be allocated in the future as needed. If data is NULL, the function does the same without storing the output data, that is, it will set critical and do error checking as usual. The value of the critical flag is returned in * critical . Supply a NULL critical if you want the function to make sure the extension is non-critical, as required by RFC 5280.
GNUTLS_E_SUCCESS on success, GNUTLS_E_INVALID_REQUEST on invalid crt , GNUTLS_E_CONSTRAINT_ERROR if the extension is incorrectly marked as critical (use a non-NULL critical to override), GNUTLS_E_UNKNOWN_ALGORITHM if the requested OID does not match (e.g., when using GNUTLS_IA_OCSP_URI), otherwise a negative error code.
Report bugs to <bug-gnutls@gnu.org>. General guidelines for reporting bugs: http://www.gnu.org/gethelp/ GnuTLS home page: http://www.gnu.org/software/gnutls/
Copyright (C) 2012 Free Software Foundation, Inc.. Copying and distribution of this file, with or without modification, are permitted in any medium without roy- alty provided the copyright notice and this notice are preserved.
The full documentation for gnutls is maintained as a Texinfo manual. If the info and gnutls programs are properly installed at your site, the command info gnutls should give you access to the complete manual. As an alternative you may obtain the manual from: http://www.gnu.org/software/gnutls/manual/ gnutls 3.1.15 gnutls_x509_crt_get_authority_info_access(3)

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