146 lines
4.0 KiB
C
146 lines
4.0 KiB
C
/*
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* Copyright (c) 1997-1999 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "kadm5_locl.h"
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RCSID("$Id: password_quality.c,v 1.1.1.2 2000/08/02 19:59:20 assar Exp $");
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#ifdef HAVE_DLFCN_H
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#include <dlfcn.h>
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#endif
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static const char *
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simple_passwd_quality (krb5_context context,
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krb5_principal principal,
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krb5_data *pwd)
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{
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if (pwd->length < 6)
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return "Password too short";
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else
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return NULL;
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}
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typedef const char* (*passwd_quality_check_func)(krb5_context,
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krb5_principal,
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krb5_data*);
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static passwd_quality_check_func passwd_quality_check = simple_passwd_quality;
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#ifdef HAVE_DLOPEN
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#define PASSWD_VERSION 0
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#endif
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/*
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* setup the password quality hook
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*/
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void
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kadm5_setup_passwd_quality_check(krb5_context context,
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const char *check_library,
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const char *check_function)
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{
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#ifdef HAVE_DLOPEN
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void *handle;
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void *sym;
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int *version;
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int flags;
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const char *tmp;
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#ifdef RTLD_NOW
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flags = RTLD_NOW;
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#else
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flags = 0;
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#endif
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if(check_library == NULL) {
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tmp = krb5_config_get_string(context, NULL,
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"password_quality",
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"check_library",
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NULL);
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if(tmp != NULL)
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check_library = tmp;
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}
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if(check_function == NULL) {
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tmp = krb5_config_get_string(context, NULL,
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"password_quality",
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"check_function",
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NULL);
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if(tmp != NULL)
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check_function = tmp;
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}
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if(check_library != NULL && check_function == NULL)
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check_function = "passwd_check";
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if(check_library == NULL)
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return;
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handle = dlopen(check_library, flags);
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if(handle == NULL) {
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krb5_warnx(context, "failed to open `%s'", check_library);
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return;
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}
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version = dlsym(handle, "version");
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if(version == NULL) {
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krb5_warnx(context,
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"didn't find `version' symbol in `%s'", check_library);
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dlclose(handle);
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return;
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}
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if(*version != PASSWD_VERSION) {
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krb5_warnx(context,
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"version of loaded library is %d (expected %d)",
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*version, PASSWD_VERSION);
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dlclose(handle);
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return;
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}
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sym = dlsym(handle, check_function);
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if(sym == NULL) {
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krb5_warnx(context,
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"didn't find `%s' symbol in `%s'",
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check_function, check_library);
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dlclose(handle);
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return;
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}
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passwd_quality_check = (passwd_quality_check_func) sym;
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#endif /* HAVE_DLOPEN */
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}
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const char *
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kadm5_check_password_quality (krb5_context context,
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krb5_principal principal,
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krb5_data *pwd_data)
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{
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return (*passwd_quality_check) (context, principal, pwd_data);
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}
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