gnutls_certificate_verify_peers(3)   gnutls   gnutls_certificate_verify_peers(3)

       gnutls_certificate_verify_peers - API function

       #include <gnutls/gnutls.h>

       int gnutls_certificate_verify_peers(gnutls_session_t session,
       gnutls_typed_vdata_st * data, unsigned int elements, unsigned int *

       gnutls_session_t session
                   is a gnutls session

       gnutls_typed_vdata_st * data
                   an array of typed data

       unsigned int elements
                   the number of data elements

       unsigned int * status
                   is the output of the verification

       This function will verify the peer's certificate and store the the status
       in the  status variable as a bitwise OR of gnutls_certificate_status_t
       values or zero if the certificate is trusted. Note that value in  status
       is set only when the return value of this function is success (i.e,
       failure to trust a certificate does not imply a negative return value).
       The default verification flags used by this function can be overridden
       using gnutls_certificate_set_verify_flags(). See the documentation of
       gnutls_certificate_verify_peers2() for details in the verification

       This function will take into account the stapled OCSP responses sent by
       the server, as well as the following X.509 certificate extensions: Name
       Constraints, Key Usage, and Basic Constraints (pathlen).

       The acceptable  data types are GNUTLS_DT_DNS_HOSTNAME,
       GNUTLS_DT_RFC822NAME and GNUTLS_DT_KEY_PURPOSE_OID.  The former two
       accept as data a null-terminated hostname or email address, and the
       latter a null-terminated object identifier (e.g.,

       If a DNS hostname is provided then this function will compare the
       hostname in the certificate against the given. If names do not match the
       GNUTLS_CERT_UNEXPECTED_OWNER status flag will be set.  If a key purpose
       OID is provided and the end-certificate contains the extended key usage
       PKIX extension, it will be required to be have the provided key purpose
       or be marked for any purpose, otherwise verification status will have the

       To avoid denial of service attacks some default upper limits regarding
       the certificate key size and chain size are set. To override them use

       Note that when using raw public-keys verification will not work because
       there is no corresponding certificate body belonging to the raw key that
       can be verified. In that case this function will return

       GNUTLS_E_SUCCESS (0) when the validation is performed, or a negative
       error code otherwise.  A successful error code means that the  status
       parameter must be checked to obtain the validation status.


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       Copying and distribution of this file, with or without modification, are
       permitted in any medium without royalty provided the copyright notice and
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       The full documentation for gnutls is maintained as a Texinfo manual.  If
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gnutls                                3.7.0   gnutls_certificate_verify_peers(3)