/*
* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
*
* Openvision retains the copyright to derivative works of
* this source code. Do *NOT* create a derivative of this
* source code before consulting with your legal department.
* Do *NOT* integrate *ANY* of this source code into another
* product before consulting with your legal department.
*
* For further information, read the top-level Openvision
* copyright which is contained in the top-level MIT Kerberos
* copyright.
*
* WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING
*
*/
/*
* Copyright 1993 OpenVision Technologies, Inc., All Rights Reserved
*
* $Header$
*/
#if !defined(lint) && !defined(__CODECENTER__)
static char *rcsid = "$Header$";
#endif
#include "autoconf.h"
#if defined(HAVE_COMPILE) && defined(HAVE_STEP)
#define SOLARIS_REGEXPS
#elif defined(HAVE_REGCOMP) && defined(HAVE_REGEXEC)
#define POSIX_REGEXPS
#elif defined(HAVE_RE_COMP) && defined(HAVE_RE_EXEC)
#define BSD_REGEXPS
#else
#error I cannot find any regexp functions
#endif
#include <sys/types.h>
#include <string.h>
#include "server_internal.h"
#include <kadm5/admin.h>
#ifdef SOLARIS_REGEXPS
#include <regexpr.h>
#endif
#ifdef POSIX_REGEXPS
#include <regex.h>
#endif
#include <stdlib.h>
struct iter_data {
krb5_context context;
char **names;
int n_names, sz_names;
unsigned int malloc_failed;
char *exp;
#ifdef SOLARIS_REGEXPS
char *expbuf;
#endif
#ifdef POSIX_REGEXPS
regex_t preg;
#endif
};
/*
* Function: glob_to_regexp
*
* Arguments:
*
* glob (r) the shell-style glob (?*[]) to convert
* realm (r) the default realm to append, or NULL
* regexp (w) the ed-style regexp created from glob
*
* Effects:
*
* regexp is filled in with allocated memory contained a regular
* expression to be used with re_comp/compile that matches what the
* shell-style glob would match. If glob does not contain an "@"
* character and realm is not NULL, "@*" is appended to the regexp.
*
* Conversion algorithm:
*
* quoted characters are copied quoted
* ? is converted to .
* * is converted to .*
* active characters are quoted: ^, $, .
* [ and ] are active but supported and have the same meaning, so
* they are copied
* other characters are copied
* regexp is anchored with ^ and $
*/
static kadm5_ret_t glob_to_regexp(char *glob, char *realm, char **regexp)
{
int append_realm;
char *p;
/* validate the glob */
if (glob[strlen(glob)-1] == '\\')
return EINVAL;
/* A character of glob can turn into two in regexp, plus ^ and $ */
/* and trailing null. If glob has no @, also allocate space for */
/* the realm. */
append_realm = (realm != NULL) && (strchr(glob, '@') == NULL);
p = (char *) malloc(strlen(glob)*2+ 3 + (append_realm ? 2 : 0));
if (p == NULL)
return ENOMEM;
*regexp = p;
*p++ = '^';
while (*glob) {
switch (*glob) {
case '?':
*p++ = '.';
break;
case '*':
*p++ = '.';
*p++ = '*';
break;
case '.':
case '^':
case '$':
*p++ = '\\';
*p++ = *glob;
break;
case '\\':
*p++ = '\\';
*p++ = *++glob;
break;
default:
*p++ = *glob;
break;
}
glob++;
}
if (append_realm) {
*p++ = '@';
*p++ = '*';
}
*p++ = '$';
*p++ = '\0';
return KADM5_OK;
}
static void get_either_iter(struct iter_data *data, char *name)
{
int match;
#ifdef SOLARIS_REGEXPS
match = (step(name, data->expbuf) != 0);
#endif
#ifdef POSIX_REGEXPS
match = (regexec(&data->preg, name, 0, NULL, 0) == 0);
#endif
#ifdef BSD_REGEXPS
match = (re_exec(name) != 0);
#endif
if (match) {
if (data->n_names == data->sz_names) {
int new_sz = data->sz_names * 2;
char **new_names = realloc(data->names,
new_sz * sizeof(char *));
if (new_names) {
data->names = new_names;
data->sz_names = new_sz;
} else {
data->malloc_failed = 1;
free(name);
return;
}
}
data->names[data->n_names++] = name;
} else
free(name);
}
static void get_pols_iter(void *data, osa_policy_ent_t entry)
{
char *name;
if ((name = strdup(entry->name)) == NULL)
return;
get_either_iter(data, name);
}
static void get_princs_iter(void *data, krb5_principal princ)
{
struct iter_data *id = (struct iter_data *) data;
char *name;
if (krb5_unparse_name(id->context, princ, &name) != 0)
return;
get_either_iter(data, name);
}
static kadm5_ret_t kadm5_get_either(int princ,
void *server_handle,
char *exp,
char ***princs,
int *count)
{
struct iter_data data;
#ifdef BSD_REGEXPS
char *msg;
#endif
char *regexp;
int i, ret;
kadm5_server_handle_t handle = server_handle;
*count = 0;
if (exp == NULL)
exp = "*";
CHECK_HANDLE(server_handle);
if ((ret = glob_to_regexp(exp, princ ? handle->params.realm : NULL,
&regexp)) != KADM5_OK)
return ret;
if (
#ifdef SOLARIS_REGEXPS
((data.expbuf = compile(regexp, NULL, NULL)) == NULL)
#endif
#ifdef POSIX_REGEXPS
((regcomp(&data.preg, regexp, REG_NOSUB)) != 0)
#endif
#ifdef BSD_REGEXPS
((msg = (char *) re_comp(regexp)) != NULL)
#endif
)
{
/* XXX syslog msg or regerr(regerrno) */
free(regexp);
return EINVAL;
}
data.n_names = 0;
data.sz_names = 10;
data.malloc_failed = 0;
data.names = malloc(sizeof(char *) * data.sz_names);
if (data.names == NULL) {
free(regexp);
return ENOMEM;
}
if (princ) {
data.context = handle->context;
ret = kdb_iter_entry(handle, exp, get_princs_iter, (void *) &data);
} else {
ret = krb5_db_iter_policy(handle->context, exp, get_pols_iter, (void *)&data);
}
free(regexp);
#ifdef POSIX_REGEXPS
regfree(&data.preg);
#endif
if ( !ret && data.malloc_failed)
ret = ENOMEM;
if ( ret ) {
for (i = 0; i < data.n_names; i++)
free(data.names[i]);
free(data.names);
return ret;
}
*princs = data.names;
*count = data.n_names;
return KADM5_OK;
}
kadm5_ret_t kadm5_get_principals(void *server_handle,
char *exp,
char ***princs,
int *count)
{
return kadm5_get_either(1, server_handle, exp, princs, count);
}
kadm5_ret_t kadm5_get_policies(void *server_handle,
char *exp,
char ***pols,
int *count)
{
return kadm5_get_either(0, server_handle, exp, pols, count);
}