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gnutls_x509_trust_list_verify_crt2 - Man Page

API function


#include <gnutls/x509.h>

int gnutls_x509_trust_list_verify_crt2(gnutls_x509_trust_list_t list, gnutls_x509_crt_t * cert_list, unsigned int cert_list_size, gnutls_typed_vdata_st * data, unsigned int elements, unsigned int flags, unsigned int * voutput, gnutls_verify_output_function func);


gnutls_x509_trust_list_t list

The list

gnutls_x509_crt_t * cert_list

is the certificate list to be verified

unsigned int cert_list_size

is the certificate list size

gnutls_typed_vdata_st * data

an array of typed data

unsigned int elements

the number of data elements

unsigned int flags

Flags that may be used to change the verification algorithm. Use OR of the gnutls_certificate_verify_flags enumerations.

unsigned int * voutput

will hold the certificate verification output.

gnutls_verify_output_function func

If non-null will be called on each chain element verification with the output.


This function will attempt to verify the given certificate chain and return its status. The  voutput parameter will hold an OR'ed sequence of gnutls_certificate_status_t flags.

When a certificate chain of  cert_list_size with more than one certificates is provided, the verification status will apply to the first certificate in the chain that failed verification. The verification process starts from the end of the chain (from CA to end certificate). The first certificate in the chain must be the end-certificate while the rest of the members may be sorted or not.

Additionally a certificate verification profile can be specified from the ones in gnutls_certificate_verification_profiles_t by ORing the result of GNUTLS_PROFILE_TO_VFLAGS() to the verification flags.

Additional verification parameters are possible via the  data types; the acceptable types are GNUTLS_DT_DNS_HOSTNAME, GNUTLS_DT_IP_ADDRESS and GNUTLS_DT_KEY_PURPOSE_OID. The former accepts as data a null-terminated hostname, and the latter a null-terminated object identifier (e.g., GNUTLS_KP_TLS_WWW_SERVER). If a DNS hostname is provided then this function will compare the hostname in the end certificate against the given. If names do not match the GNUTLS_CERT_UNEXPECTED_OWNER status flag will be set. In addition it will consider certificates provided with gnutls_x509_trust_list_add_named_crt().

If a key purpose OID is provided and the end-certificate contains the extended key usage PKIX extension, it will be required to match the provided OID or be marked for any purpose, otherwise verification will fail with  GNUTLS_CERT_PURPOSE_MISMATCH status.


On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error value. Note that verification failure will not result to an error code, only  voutput will be updated.



Reporting Bugs

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

See Also

The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit



3.8.6 gnutls