Blame doc/functions/gnutls_x509_crt_get_authority_key_id
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@deftypefun {int} {gnutls_x509_crt_get_authority_key_id} (gnutls_x509_crt_t @var{cert}, void * @var{id}, size_t * @var{id_size}, unsigned int * @var{critical})
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@var{cert}: should contain a @code{gnutls_x509_crt_t} type
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@var{id}: The place where the identifier will be copied
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@var{id_size}: Holds the size of the id field.
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@var{critical}: will be non-zero if the extension is marked as critical (may be null)
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This function will return the X.509v3 certificate authority's key
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identifier. This is obtained by the X.509 Authority Key
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identifier extension field (2.5.29.35). Note that this function
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only returns the keyIdentifier field of the extension and
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@code{GNUTLS_E_X509_UNSUPPORTED_EXTENSION} , if the extension contains
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the name and serial number of the certificate. In that case
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@code{gnutls_x509_crt_get_authority_key_gn_serial()} may be used.
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@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, @code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE}
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if the extension is not present, otherwise a negative error value.
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@end deftypefun
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