Section: gnutls (3)
dane_verify_crt - API function
int dane_verify_crt(dane_state_t s, const gnutls_datum_t * chain, unsigned chain_size, gnutls_certificate_type_t chain_type, const char * hostname, const char * proto, unsigned int port, unsigned int sflags, unsigned int vflags, unsigned int * verify);
- dane_state_t s
A DANE state structure (may be NULL)
- const gnutls_datum_t * chain
A certificate chain
- unsigned chain_size
The size of the chain
- gnutls_certificate_type_t chain_type
The type of the certificate chain
- const char * hostname
The hostname associated with the chain
- const char * proto
The protocol of the service connecting (e.g. tcp)
- unsigned int port
The port of the service connecting (e.g. 443)
- unsigned int sflags
Flags for the initialization of s (if NULL)
- unsigned int vflags
Verification flags; an OR'ed list of dane_verify_flags_t.
- unsigned int * verify
An OR'ed list of dane_verify_status_t.
This function will verify the given certificate chain against the
CA constrains and/or the certificate available via DANE.
If no information via DANE can be obtained the flag DANE_VERIFY_NO_DANE_INFO
is set. If a DNSSEC signature is not available for the DANE
record then the verify flag DANE_VERIFY_NO_DNSSEC_DATA
Due to the many possible options of DANE, there is no single threat
model countered. When notifying the user about DANE verification results
it may be better to mention: DANE verification did not reject the certificate,
rather than mentioning a successful DANE verication.
Note that this function is designed to be run in addition to
PKIX - certificate chain - verification. To be run independently
the DANE_VFLAG_ONLY_CHECK_EE_USAGE flag should be specified;
then the function will check whether the key of the peer matches the
key advertized in the DANE entry.
a negative error code on error and DANE_E_SUCCESS
when the DANE entries were successfully parsed, irrespective of
whether they were verified (see verify
for that information). If
no usable entries were encountered DANE_E_REQUESTED_DATA_NOT_AVAILABLE
will be returned.
Report bugs to <firstname.lastname@example.org
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