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 - return the certificate's key usage
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SYNOPSIS

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

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

25       This function will return  certificate's  key  usage,  by  reading  the
26       keyUsage X.509 extension (2.5.29.15). The key usage value will
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ORED VALUES OF THE

29       GNUTLS_KEY_DIGITAL_SIGNATURE,               GNUTLS_KEY_NON_REPUDIATION,
30       GNUTLS_KEY_KEY_ENCIPHERMENT,              GNUTLS_KEY_DATA_ENCIPHERMENT,
31       GNUTLS_KEY_KEY_AGREEMENT,                     GNUTLS_KEY_KEY_CERT_SIGN,
32       GNUTLS_KEY_CRL_SIGN,     GNUTLS_KEY_ENCIPHER_ONLY,     GNUTLS_KEY_DECI‐
33       PHER_ONLY.
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RETURNS

36       the  certificate  key  usage,  or  a  negative value in case of parsing
37       error.  If the certificate does  not  contain  the  keyUsage  extension
38       GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE will be returned.
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REPORTING BUGS

41       Report    bugs    to    <bug-gnutls@gnu.org>.     GnuTLS   home   page:
42       http://www.gnu.org/software/gnutls/ General help  using  GNU  software:
43       http://www.gnu.org/gethelp/
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46       Copyright © 2008 Free Software Foundation.
47       Copying  and  distribution  of this file, with or without modification,
48       are permitted in any medium  without  royalty  provided  the  copyright
49       notice and this notice are preserved.
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SEE ALSO

52       The  full  documentation  for gnutls is maintained as a Texinfo manual.
53       If the info and gnutls programs are properly installed  at  your  site,
54       the command
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56              info gnutls
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58       should give you access to the complete manual.
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62gnutls                               2.8.6    gnutls_x509_crt_get_key_usage(3)
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