Blame doc/functions/gnutls_pubkey_get_key_id
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@deftypefun {int} {gnutls_pubkey_get_key_id} (gnutls_pubkey_t @var{key}, unsigned int @var{flags}, unsigned char * @var{output_data}, size_t * @var{output_data_size})
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@var{key}: Holds the public key
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@var{flags}: should be one of the flags from @code{gnutls_keyid_flags_t}
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@var{output_data}: will contain the key ID
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@var{output_data_size}: holds the size of output_data (and will be
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replaced by the actual size of parameters)
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This function will return a unique ID that depends on the public
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key parameters. This ID can be used in checking whether a
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certificate corresponds to the given public key.
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If the buffer provided is not long enough to hold the output, then
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*output_data_size is updated and @code{GNUTLS_E_SHORT_MEMORY_BUFFER} will
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be returned. The output will normally be a SHA-1 hash output,
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which is 20 bytes.
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@strong{Returns:} In case of failure a negative error code will be
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returned, and 0 on success.
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@strong{Since:} 2.12.0
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@end deftypefun
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