1gnutls_x509_crt_get_key_id(3)       gnutls       gnutls_x509_crt_get_key_id(3)
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NAME

6       gnutls_x509_crt_get_key_id  -  Return unique ID of public key's parame‐
7       ters
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SYNOPSIS

10       #include <gnutls/x509.h>
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12       int  gnutls_x509_crt_get_key_id(gnutls_x509_crt_t  crt,  unsigned   int
13       flags, unsigned char * output_data, size_t * output_data_size);
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ARGUMENTS

16       gnutls_x509_crt_t crt
17                   Holds the certificate
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19       unsigned int flags
20                   should be 0 for now
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22       unsigned char * output_data
23                   will contain the key ID
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25       size_t * output_data_size
26                   holds  the size of output_data (and will be replaced by the
27                   actual size of parameters)
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DESCRIPTION

30       This function will return a unique ID the depends  on  the  public  key
31       parameters.  This ID can be used in checking whether a certificate cor‐
32       responds to the given private key.
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34       If the buffer provided is not long enough  to  hold  the  output,  then
35       *output_data_size  is  updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be
36       returned.  The output will normally be a SHA-1 hash output, which is 20
37       bytes.
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RETURN VALUE

40       In case of failure a negative value will be returned, and 0 on success.
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REPORTING BUGS

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

54       The  full  documentation  for gnutls is maintained as a Texinfo manual.
55       If the info and gnutls programs are properly installed  at  your  site,
56       the command
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58              info gnutls
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60       should give you access to the complete manual.
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64gnutls                               2.8.6       gnutls_x509_crt_get_key_id(3)
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