NAME

       ldns_dane_verify, ldns_dane_verify_rr - TLSA RR verification functions

SYNOPSIS

       #include <stdint.h>
       #include <stdbool.h>

       #include <ldns/ldns.h>

       ldns_status ldns_dane_verify(const ldns_rr_list* tlsas, X509* cert, STACK_OF(X509)*
       extra_certs, X509_STORE* pkix_validation_store);

       ldns_status ldns_dane_verify_rr(const ldns_rr* tlsa_rr, X509* cert, STACK_OF(X509)*
       extra_certs, X509_STORE* pkix_validation_store);

DESCRIPTION

       ldns_dane_verify() BEWARE!  We strongly recommend to use OpenSSL 1.1.0 dane verification
              functions instead of the ones provided by ldns.  When OpenSSL 1.1.0 was available
              ldns will use the OpenSSL 1.1.0 dane verification functions under the hood.  When
              ldns was linked with OpenSSL < 1.1.0, this function will not be able to verify TLSA
              records with DANE-TA usage types.

              BEWARE! The ldns dane verification functions do *not* do server name checks.  The
              user has to perform additional server name checks themselves!

              Verify if any of the given TLSA resource records matches the given certificate.

              tlsas: The resource records that specify what and how to match the certificate. One
              must match for this function to succeed. With tlsas == NULL or the number of TLSA
              records in tlsas == 0, regular PKIX validation is performed.
              cert: The certificate to match (and validate)
              extra_certs: Intermediate certificates that might be necessary creating the
              validation chain.
              pkix_validation_store: Used when the certificate usage is "CA constraint" or
              "Service Certificate Constraint" to validate the certificate.

              Returns LDNS_STATUS_OK on success, LDNS_STATUS_DANE_NEED_OPENSSL_GE_1_1_FOR_DANE_TA
              when at least one of the TLSA's had usage type DANE-TA and none of the TLSA's
              matched or PKIX validated, LDNS_STATUS_DANE_PKIX_DID_NOT_VALIDATE when one of the
              TLSA's matched but the PKIX validation failed, LDNS_STATUS_DANE_TLSA_DID_NOT_MATCH
              when none of the TLSA's matched, or other ldns_status errors.

       ldns_dane_verify_rr() BEWARE!  We strongly recommend to use OpenSSL 1.1.0 dane
              verification functions instead of the ones provided by ldns.  When OpenSSL 1.1.0
              was available ldns will use the OpenSSL 1.1.0 dane verification functions under the
              hood.  When ldns was linked with OpenSSL < 1.1.0, this function will not be able to
              verify TLSA records with DANE-TA usage types.

              BEWARE! The ldns dane verification functions do *not* do server name checks.  The
              user has to perform additional server name checks themselves!

              Verify if the given TLSA resource record matches the given certificate.  Reporting
              on a TLSA rr mismatch (LDNS_STATUS_DANE_TLSA_DID_NOT_MATCH) is preferred over PKIX
              failure  (LDNS_STATUS_DANE_PKIX_DID_NOT_VALIDATE).  So when PKIX validation is
              required by the TLSA Certificate usage, but the TLSA data does not match,
              LDNS_STATUS_DANE_TLSA_DID_NOT_MATCH is returned whether the PKIX validated or not.

              When ldns is linked with OpenSSL < 1.1.0 and this function is available, then the
              DANE-TA usage type will not be verified, and on a tlsa_rr with this usage type,
              LDNS_STATUS_DANE_NEED_OPENSSL_GE_1_1_FOR_DANE_TA will be returned.

              tlsa_rr: The resource record that specifies what and how to match the certificate.
              With tlsa_rr == NULL, regular PKIX validation is performed.
              cert: The certificate to match (and validate)
              extra_certs: Intermediate certificates that might be necessary creating the
              validation chain.
              pkix_validation_store: Used when the certificate usage is "CA constraint" or
              "Service Certificate Constraint" to validate the certificate.

              Returns LDNS_STATUS_OK on success, LDNS_STATUS_DANE_NEED_OPENSSL_GE_1_1_FOR_DANE_TA
              when the provided TLSA had the DANE-TA usage type,
              LDNS_STATUS_DANE_TLSA_DID_NOT_MATCH on TLSA data mismatch,
              LDNS_STATUS_DANE_PKIX_DID_NOT_VALIDATE when TLSA matched, but the PKIX validation
              failed, or other ldns_status errors.

AUTHOR

       The ldns team at NLnet Labs.

REPORTING BUGS

       Please report bugs to ldns-team@nlnetlabs.nl or in our bugzilla at
       http://www.nlnetlabs.nl/bugs/index.html

COPYRIGHT

       Copyright (c) 2004 - 2006 NLnet Labs.

       Licensed under the BSD License. There is NO warranty; not even for MERCHANTABILITY or
       FITNESS FOR A PARTICULAR PURPOSE.

SEE ALSO

       ldns_dane_create_tlsa_owner, ldns_dane_cert2rdf, ldns_dane_select_certificate,
       ldns_dane_create_tlsa_rr.  And perldoc Net::DNS, RFC1034, RFC1035, RFC4033, RFC4034  and
       RFC4035.

REMARKS

       This manpage was automatically generated from the ldns source code.

                                           30 May 2006                                    ldns(3)