X509_VERIFY_PARAM_add0_policy(3ssl) - phpMan

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X509_VERIFY_PARAM_set_flags(3)               OpenSSL               X509_VERIFY_PARAM_set_flags(3)



NAME
       X509_VERIFY_PARAM_set_flags, X509_VERIFY_PARAM_clear_flags, X509_VERIFY_PARAM_get_flags,
       X509_VERIFY_PARAM_set_purpose, X509_VERIFY_PARAM_set_trust, X509_VERIFY_PARAM_set_depth,
       X509_VERIFY_PARAM_get_depth, X509_VERIFY_PARAM_set_time, X509_VERIFY_PARAM_add0_policy,
       X509_VERIFY_PARAM_set1_policies, X509_VERIFY_PARAM_set1_host, X509_VERIFY_PARAM_add1_host,
       X509_VERIFY_PARAM_set_hostflags, X509_VERIFY_PARAM_get0_peername,
       X509_VERIFY_PARAM_set1_email, X509_VERIFY_PARAM_set1_ip, X509_VERIFY_PARAM_set1_ip_asc -
       X509 verification parameters

SYNOPSIS
        #include <openssl/x509_vfy.h>

        int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags);
        int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param,
                                                               unsigned long flags);
        unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param);

        int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose);
        int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust);

        void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t);

        int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param,
                                                       ASN1_OBJECT *policy);
        int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param,
                                               STACK_OF(ASN1_OBJECT) *policies);

        void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth);
        int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param);

        int X509_VERIFY_PARAM_set1_host(X509_VERIFY_PARAM *param,
                                        const char *name, size_t namelen);
        int X509_VERIFY_PARAM_add1_host(X509_VERIFY_PARAM *param,
                                        const char *name, size_t namelen);
        void X509_VERIFY_PARAM_set_hostflags(X509_VERIFY_PARAM *param,
                                             unsigned int flags);
        char *X509_VERIFY_PARAM_get0_peername(X509_VERIFY_PARAM *param);
        int X509_VERIFY_PARAM_set1_email(X509_VERIFY_PARAM *param,
                                        const char *email, size_t emaillen);
        int X509_VERIFY_PARAM_set1_ip(X509_VERIFY_PARAM *param,
                                      const unsigned char *ip, size_t iplen);
        int X509_VERIFY_PARAM_set1_ip_asc(X509_VERIFY_PARAM *param, const char *ipasc);

DESCRIPTION
       These functions manipulate the X509_VERIFY_PARAM structure associated with a certificate
       verification operation.

       The X509_VERIFY_PARAM_set_flags() function sets the flags in param by oring it with flags.
       See the VERIFICATION FLAGS section for a complete description of values the flags
       parameter can take.

       X509_VERIFY_PARAM_get_flags() returns the flags in param.

       X509_VERIFY_PARAM_clear_flags() clears the flags flags in param.

       X509_VERIFY_PARAM_set_purpose() sets the verification purpose in param to purpose. This
       determines the acceptable purpose of the certificate chain, for example SSL client or SSL
       server.

       X509_VERIFY_PARAM_set_trust() sets the trust setting in param to trust.

       X509_VERIFY_PARAM_set_time() sets the verification time in param to t. Normally the
       current time is used.

       X509_VERIFY_PARAM_add0_policy() enables policy checking (it is disabled by default) and
       adds policy to the acceptable policy set.

       X509_VERIFY_PARAM_set1_policies() enables policy checking (it is disabled by default) and
       sets the acceptable policy set to policies. Any existing policy set is cleared. The
       policies parameter can be NULL to clear an existing policy set.

       X509_VERIFY_PARAM_set_depth() sets the maximum verification depth to depth.  That is the
       maximum number of untrusted CA certificates that can appear in a chain.

       X509_VERIFY_PARAM_set1_host() sets the expected DNS hostname to name clearing any
       previously specified host name or names.  If name is NULL, or empty the list of hostnames
       is cleared, and name checks are not performed on the peer certificate.  If name is NUL-
       terminated, namelen may be zero, otherwise namelen must be set to the length of name.
       When a hostname is specified, certificate verification automatically invokes
       X509_check_host(3) with flags equal to the flags argument given to
       X509_VERIFY_PARAM_set_hostflags() (default zero).  Applications are strongly advised to
       use this interface in preference to explicitly calling X509_check_host(3), hostname checks
       are out of scope with the DANE-EE(3) certificate usage, and the internal check will be
       suppressed as appropriate when DANE support is added to OpenSSL.

       X509_VERIFY_PARAM_add1_host() adds name as an additional reference identifer that can
       match the peer's certificate.  Any previous names set via X509_VERIFY_PARAM_set1_host() or
       X509_VERIFY_PARAM_add1_host() are retained, no change is made if name is NULL or empty.
       When multiple names are configured, the peer is considered verified when any name matches.

       X509_VERIFY_PARAM_get0_peername() returns the DNS hostname or subject CommonName from the
       peer certificate that matched one of the reference identifiers.  When wildcard matching is
       not disabled, or when a reference identifier specifies a parent domain (starts with ".")
       rather than a hostname, the peer name may be a wildcard name or a sub-domain of the
       reference identifier respectively.  The return string is allocated by the library and is
       no longer valid once the associated param argument is freed.  Applications must not free
       the return value.

       X509_VERIFY_PARAM_set1_email() sets the expected RFC822 email address to email.  If email
       is NUL-terminated, emaillen may be zero, otherwise emaillen must be set to the length of
       email.  When an email address is specified, certificate verification automatically invokes
       X509_check_email(3).

       X509_VERIFY_PARAM_set1_ip() sets the expected IP address to ip.  The ip argument is in
       binary format, in network byte-order and iplen must be set to 4 for IPv4 and 16 for IPv6.
       When an IP address is specified, certificate verification automatically invokes
       X509_check_ip(3).

       X509_VERIFY_PARAM_set1_ip_asc() sets the expected IP address to ipasc.  The ipasc argument
       is a NUL-terminal ASCII string: dotted decimal quad for IPv4 and colon-separated
       hexadecimal for IPv6.  The condensed "::" notation is supported for IPv6 addresses.

RETURN VALUES
       X509_VERIFY_PARAM_set_flags(), X509_VERIFY_PARAM_clear_flags(),
       X509_VERIFY_PARAM_set_purpose(), X509_VERIFY_PARAM_set_trust(),
       X509_VERIFY_PARAM_add0_policy() X509_VERIFY_PARAM_set1_policies(),
       X509_VERIFY_PARAM_set1_host(), X509_VERIFY_PARAM_set_hostflags(),
       X509_VERIFY_PARAM_set1_email(), X509_VERIFY_PARAM_set1_ip() and
       X509_VERIFY_PARAM_set1_ip_asc() return 1 for success and 0 for failure.

       X509_VERIFY_PARAM_get_flags() returns the current verification flags.

       X509_VERIFY_PARAM_set_time() and X509_VERIFY_PARAM_set_depth() do not return values.

       X509_VERIFY_PARAM_get_depth() returns the current verification depth.

VERIFICATION FLAGS
       The verification flags consists of zero or more of the following flags ored together.

       X509_V_FLAG_CRL_CHECK enables CRL checking for the certificate chain leaf certificate. An
       error occurs if a suitable CRL cannot be found.

       X509_V_FLAG_CRL_CHECK_ALL enables CRL checking for the entire certificate chain.

       X509_V_FLAG_IGNORE_CRITICAL disabled critical extension checking. By default any unhandled
       critical extensions in certificates or (if checked) CRLs results in a fatal error. If this
       flag is set unhandled critical extensions are ignored. WARNING setting this option for
       anything other than debugging purposes can be a security risk. Finer control over which
       extensions are supported can be performed in the verification callback.

       THe X509_V_FLAG_X509_STRICT flag disables workarounds for some broken certificates and
       makes the verification strictly apply X509 rules.

       X509_V_FLAG_ALLOW_PROXY_CERTS enables proxy certificate verification.

       X509_V_FLAG_POLICY_CHECK enables certificate policy checking, by default no policy
       checking is peformed. Additional information is sent to the verification callback relating
       to policy checking.

       X509_V_FLAG_EXPLICIT_POLICY, X509_V_FLAG_INHIBIT_ANY and X509_V_FLAG_INHIBIT_MAP set the
       require explicit policy, inhibit any policy and inhibit policy mapping flags respectively
       as defined in RFC3280. Policy checking is automatically enabled if any of these flags are
       set.

       If X509_V_FLAG_NOTIFY_POLICY is set and the policy checking is successful a special status
       code is set to the verification callback. This permits it to examine the valid policy tree
       and perform additional checks or simply log it for debugging purposes.

       By default some additional features such as indirect CRLs and CRLs signed by different
       keys are disabled. If X509_V_FLAG_EXTENDED_CRL_SUPPORT is set they are enabled.

       If X509_V_FLAG_USE_DELTAS ise set delta CRLs (if present) are used to determine
       certificate status. If not set deltas are ignored.

       X509_V_FLAG_CHECK_SS_SIGNATURE enables checking of the root CA self signed cerificate
       signature. By default this check is disabled because it doesn't add any additional
       security but in some cases applications might want to check the signature anyway. A side
       effect of not checking the root CA signature is that disabled or unsupported message
       digests on the root CA are not treated as fatal errors.

       The X509_V_FLAG_CB_ISSUER_CHECK flag enables debugging of certificate issuer checks. It is
       not needed unless you are logging certificate verification. If this flag is set then
       additional status codes will be sent to the verification callback and it must be prepared
       to handle such cases without assuming they are hard errors.

       The X509_V_FLAG_NO_ALT_CHAINS flag suppresses checking for alternative chains. By default,
       when building a certificate chain, if the first certificate chain found is not trusted,
       then OpenSSL will continue to check to see if an alternative chain can be found that is
       trusted. With this flag set the behaviour will match that of OpenSSL versions prior to
       1.0.2b.

NOTES
       The above functions should be used to manipulate verification parameters instead of legacy
       functions which work in specific structures such as X509_STORE_CTX_set_flags().

BUGS
       Delta CRL checking is currently primitive. Only a single delta can be used and (partly due
       to limitations of X509_STORE) constructed CRLs are not maintained.

       If CRLs checking is enable CRLs are expected to be available in the corresponding
       X509_STORE structure. No attempt is made to download CRLs from the CRL distribution points
       extension.

EXAMPLE
       Enable CRL checking when performing certificate verification during SSL connections
       associated with an SSL_CTX structure ctx:

         X509_VERIFY_PARAM *param;
         param = X509_VERIFY_PARAM_new();
         X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
         SSL_CTX_set1_param(ctx, param);
         X509_VERIFY_PARAM_free(param);

SEE ALSO
       X509_verify_cert(3), X509_check_host(3), X509_check_email(3), X509_check_ip(3)

HISTORY
       The X509_V_FLAG_NO_ALT_CHAINS flag was added in OpenSSL 1.0.2b



1.0.2k                                      2017-01-26             X509_VERIFY_PARAM_set_flags(3)

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