gnutls_x509_crt_get_key_id(3)

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 - API function
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SYNOPSIS

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

15       gnutls_x509_crt_t crt
16                   Holds the certificate
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18       unsigned int flags
19                   should be one of the flags from gnutls_keyid_flags_t
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21       unsigned char * output_data
22                   will contain the key ID
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24       size_t * output_data_size
25                   holds the size of output_data (and will be replaced by  the
26                   actual size of parameters)
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DESCRIPTION

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

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

43       Report bugs to <bugs@gnutls.org>.
44       Home page: https://www.gnutls.org
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COPYRIGHT

48       Copyright © 2001- Free Software Foundation, Inc., and others.
49       Copying  and  distribution  of this file, with or without modification,
50       are permitted in any medium without royalty provided the copyright  no‐
51       tice and this notice are preserved.
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