1gnutls_x509_crt_get_key_usage(3)    gnutls    gnutls_x509_crt_get_key_usage(3)
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NAME

6       gnutls_x509_crt_get_key_usage - This function returns the certificate's
7       key usage
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SYNOPSIS

10       #include <gnutls/x509.h>
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12       int gnutls_x509_crt_get_key_usage(gnutls_x509_crt_t cert, unsigned  int
13       * key_usage, unsigned int * critical);
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ARGUMENTS

16       gnutls_x509_crt_t cert
17                   should contain a gnutls_x509_crt_t structure
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19       unsigned int * key_usage
20                   where the key usage bits will be stored
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22       unsigned int * critical
23                   will be non zero if the extension is marked as critical
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DESCRIPTION

26       This  function  will  return  certificate's  key  usage, by reading the
27       keyUsage X.509 extension (2.5.29.15). The key  usage  value  will  ORed
28       values  of  the:  GNUTLS_KEY_DIGITAL_SIGNATURE, GNUTLS_KEY_NON_REPUDIA‐
29       TION,    GNUTLS_KEY_KEY_ENCIPHERMENT,     GNUTLS_KEY_DATA_ENCIPHERMENT,
30       GNUTLS_KEY_KEY_AGREEMENT,                     GNUTLS_KEY_KEY_CERT_SIGN,
31       GNUTLS_KEY_CRL_SIGN,     GNUTLS_KEY_ENCIPHER_ONLY,     GNUTLS_KEY_DECI‐
32       PHER_ONLY.
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34       A negative value may be returned in case of parsing error.  If the cer‐
35       tificate    does     not     contain     the     keyUsage     extension
36       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
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REPORTING BUGS

39       Report bugs to <bug-gnutls@gnu.org>.
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42       Copyright © 2006 Free Software Foundation.
43       Permission  is  granted  to make and distribute verbatim copies of this
44       manual provided the copyright notice and  this  permission  notice  are
45       preserved on all copies.
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SEE ALSO

48       The  full  documentation  for gnutls is maintained as a Texinfo manual.
49       If the info and gnutls programs are properly installed  at  your  site,
50       the command
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52              info gnutls
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54       should give you access to the complete manual.
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58gnutls                               1.6.3    gnutls_x509_crt_get_key_usage(3)
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