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IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $Id$ .\" .Dd February 29, 2004 .Dt KADM5_PWCHECK 3 .Os HEIMDAL .Sh NAME .Nm krb5_pwcheck , .Nm kadm5_setup_passwd_quality_check , .Nm kadm5_add_passwd_quality_verifier , .Nm kadm5_check_password_quality .Nd Heimdal warning and error functions .Sh LIBRARY Kerberos 5 Library (libkadm5srv, -lkadm5srv) .Sh SYNOPSIS .In kadm5-protos.h .In kadm5-pwcheck.h .Ft void .Fo kadm5_setup_passwd_quality_check .Fa "krb5_context context" .Fa "const char *check_library" .Fa "const char *check_function" .Fc .Ft "krb5_error_code" .Fo kadm5_add_passwd_quality_verifier .Fa "krb5_context context" .Fa "const char *check_library" .Fc .Ft "const char *" .Fo kadm5_check_password_quality .Fa "krb5_context context" .Fa "krb5_principal principal" .Fa "krb5_data *pwd_data" .Fc .Ft int .Fo "(*kadm5_passwd_quality_check_func)" .Fa "krb5_context context" .Fa "krb5_principal principal" .Fa "krb5_data *password" .Fa "const char *tuning" .Fa "char *message" .Fa "size_t length" .Fc .Sh DESCRIPTION These functions perform the quality check for the heimdal database library. .Pp There are two versions of the shared object API; the old version (0) is deprecated, but still supported. The new version (1) supports multiple password quality checking policies in the same shared object. See below for details. .Pp The password quality checker will run all policies that are configured by the user. If any policy rejects the password, the password will be rejected. .Pp Policy names are of the form .Ql module-name:policy-name or, if the the policy name is unique enough, just .Ql policy-name . .Sh IMPLEMENTING A PASSWORD QUALITY CHECKING SHARED OBJECT (This refers to the version 1 API only.) .Pp Module shared objects may conveniently be compiled and linked with .Xr libtool 1 . An object needs to export a symbol called .Ql kadm5_password_verifier of the type .Ft "struct kadm5_pw_policy_verifier" . .Pp Its .Ft name and .Ft vendor fields should contain the obvious information. .Ft name must match the .Ql module-name portion of the policy name (the part before the colon), if the policy name contains a colon, or the policy will not be run. .Ft version should be .Dv KADM5_PASSWD_VERSION_V1 . .Pp .Ft funcs contains an array of .Ft "struct kadm5_pw_policy_check_func" structures that is terminated with an entry whose .Ft name component is .Dv NULL . The .Ft name field of the array must match the .Ql policy-name portion of a policy name (the part after the colon, or the complete policy name if there is no colon) specified by the user or the policy will not be run. The .Ft func fields of the array elements are functions that are exported by the module to be called to check the password. They get the following arguments: the Kerberos context, principal, password, a tuning parameter, and a pointer to a message buffer and its length. The tuning parameter for the quality check function is currently always .Dv NULL . If the password is acceptable, the function returns zero. Otherwise it returns non-zero and fills in the message buffer with an appropriate explanation. .Sh RUNNING THE CHECKS .Nm kadm5_setup_passwd_quality_check sets up type 0 checks. It sets up all type 0 checks defined in .Xr krb5.conf 5 if called with the last two arguments null. .Pp .Nm kadm5_add_passwd_quality_verifier sets up type 1 checks. It sets up all type 1 tests defined in .Xr krb5.conf 5 if called with a null second argument. .Nm kadm5_check_password_quality runs the checks in the order in which they are defined in .Xr krb5.conf 5 and the order in which they occur in a module's .Ft funcs array until one returns non-zero. .Sh SEE ALSO .Xr libtool 1 , .Xr krb5 3 , .Xr krb5.conf 5