DOKK / manpages / debian 10 / gnutls-doc / gnutls_x509_crq_get_key_id.3.en
gnutls_x509_crq_get_key_id(3) gnutls gnutls_x509_crq_get_key_id(3)

gnutls_x509_crq_get_key_id - API function

#include <gnutls/x509.h>

int gnutls_x509_crq_get_key_id(gnutls_x509_crq_t crq, unsigned int flags, unsigned char * output_data, size_t * output_data_size);

a certificate of type gnutls_x509_crq_t
should be one of the flags from gnutls_keyid_flags_t
will contain the key ID
holds the size of output_data (and will be replaced by the actual size of parameters)

This function will return a unique ID that depends on the public key parameters. This ID can be used in checking whether a certificate corresponds to the given private key.

If the buffer provided is not long enough to hold the output, then * output_data_size is updated and GNUTLS_E_SHORT_MEMORY_BUFFER will be returned. The output will normally be a SHA-1 hash output, which is 20 bytes.

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

2.8.0

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

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