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@deftypefun {int} {gnutls_pubkey_get_openpgp_key_id} (gnutls_pubkey_t @var{key}, unsigned int @var{flags}, unsigned char * @var{output_data}, size_t * @var{output_data_size}, unsigned int * @var{subkey})
@var{key}: Holds the public key
@var{flags}: should be 0 or @code{GNUTLS_PUBKEY_GET_OPENPGP_FINGERPRINT}
@var{output_data}: will contain the key ID
@var{output_data_size}: holds the size of output_data (and will be
replaced by the actual size of parameters)
@var{subkey}: Will be non zero if the key ID corresponds to a subkey
This function returns the OpenPGP key ID of the corresponding key.
The key is a unique ID that depends on the public
key parameters.
If the flag @code{GNUTLS_PUBKEY_GET_OPENPGP_FINGERPRINT} is specified
this function returns the fingerprint of the master key.
If the buffer provided is not long enough to hold the output, then
*output_data_size is updated and @code{GNUTLS_E_SHORT_MEMORY_BUFFER} will
be returned. The output is @code{GNUTLS_OPENPGP_KEYID_SIZE} bytes long.
@strong{Returns:} In case of failure a negative error code will be
returned, and 0 on success.
@strong{Since:} 3.0
@end deftypefun
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