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apache/support/htdbm.c

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/* Copyright 2001-2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* htdbm.c: simple program for manipulating DBM
* password databases for the Apache HTTP server
*
* Contributed by Mladen Turk <mturk mappingsoft.com>
* 12 Oct 2001
*/
#include "apr.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_file_io.h"
#include "apr_file_info.h"
#include "apr_pools.h"
#include "apr_signal.h"
#include "apr_md5.h"
#include "apr_sha1.h"
#include "apr_dbm.h"
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_STRINGS_H
#include <strings.h>
#endif
#include <time.h>
#if APR_CHARSET_EBCDIC
#include "apr_xlate.h"
#endif /*APR_CHARSET_EBCDIC*/
#if APR_HAVE_CRYPT_H
#include <crypt.h>
#endif
#if !APR_CHARSET_EBCDIC
#define LF 10
#define CR 13
#else /*APR_CHARSET_EBCDIC*/
#define LF '\n'
#define CR '\r'
#endif /*APR_CHARSET_EBCDIC*/
#define MAX_STRING_LEN 256
#define ALG_PLAIN 0
#define ALG_APMD5 1
#define ALG_APSHA 2
#if APR_HAVE_CRYPT_H
#define ALG_CRYPT 3
#endif
#define ERR_FILEPERM 1
#define ERR_SYNTAX 2
#define ERR_PWMISMATCH 3
#define ERR_INTERRUPTED 4
#define ERR_OVERFLOW 5
#define ERR_BADUSER 6
#define ERR_EMPTY 7
typedef struct htdbm_t htdbm_t;
struct htdbm_t {
apr_dbm_t *dbm;
apr_pool_t *pool;
#if APR_CHARSET_EBCDIC
apr_xlate_t *to_ascii;
#endif
char *filename;
char *username;
char *userpass;
char *comment;
char *type;
int create;
int rdonly;
int alg;
};
#define HTDBM_MAKE 0
#define HTDBM_DELETE 1
#define HTDBM_VERIFY 2
#define HTDBM_LIST 3
#define HTDBM_NOFILE 4
#define HTDBM_STDIN 5
static void terminate(void)
{
apr_terminate();
#ifdef NETWARE
pressanykey();
#endif
}
static void htdbm_terminate(htdbm_t *htdbm)
{
if (htdbm->dbm)
apr_dbm_close(htdbm->dbm);
htdbm->dbm = NULL;
}
static htdbm_t *h;
static void htdbm_interrupted(void)
{
htdbm_terminate(h);
fprintf(stderr, "htdbm Interrupted !\n");
exit(ERR_INTERRUPTED);
}
static apr_status_t htdbm_init(apr_pool_t **pool, htdbm_t **hdbm)
{
#if APR_CHARSET_EBCDIC
apr_status_t rv;
#endif
apr_pool_create( pool, NULL);
apr_signal(SIGINT, (void (*)(int)) htdbm_interrupted);
(*hdbm) = (htdbm_t *)apr_pcalloc(*pool, sizeof(htdbm_t));
(*hdbm)->pool = *pool;
#if APR_CHARSET_EBCDIC
rv = apr_xlate_open(&((*hdbm)->to_ascii), "ISO8859-1", APR_DEFAULT_CHARSET, (*hdbm)->pool);
if (rv) {
fprintf(stderr, "apr_xlate_open(to ASCII)->%d\n", rv);
return APR_EGENERAL;
}
rv = apr_SHA1InitEBCDIC((*hdbm)->to_ascii);
if (rv) {
fprintf(stderr, "apr_SHA1InitEBCDIC()->%d\n", rv);
return APR_EGENERAL;
}
rv = apr_MD5InitEBCDIC((*hdbm)->to_ascii);
if (rv) {
fprintf(stderr, "apr_MD5InitEBCDIC()->%d\n", rv);
return APR_EGENERAL;
}
#endif /*APR_CHARSET_EBCDIC*/
/* Set MD5 as default */
(*hdbm)->alg = ALG_APMD5;
(*hdbm)->type = "default";
return APR_SUCCESS;
}
static apr_status_t htdbm_open(htdbm_t *htdbm)
{
if (htdbm->create)
return apr_dbm_open_ex(&htdbm->dbm, htdbm->type, htdbm->filename, APR_DBM_RWCREATE,
APR_OS_DEFAULT, htdbm->pool);
else
return apr_dbm_open_ex(&htdbm->dbm, htdbm->type, htdbm->filename,
htdbm->rdonly ? APR_DBM_READONLY : APR_DBM_READWRITE,
APR_OS_DEFAULT, htdbm->pool);
}
static apr_status_t htdbm_save(htdbm_t *htdbm, int *changed)
{
apr_datum_t key, val;
if (!htdbm->username)
return APR_SUCCESS;
key.dptr = htdbm->username;
key.dsize = strlen(htdbm->username);
if (apr_dbm_exists(htdbm->dbm, key))
*changed = 1;
val.dsize = strlen(htdbm->userpass);
if (!htdbm->comment)
val.dptr = htdbm->userpass;
else {
val.dptr = apr_pstrcat(htdbm->pool, htdbm->userpass, ":",
htdbm->comment, NULL);
val.dsize += (strlen(htdbm->comment) + 1);
}
return apr_dbm_store(htdbm->dbm, key, val);
}
static apr_status_t htdbm_del(htdbm_t *htdbm)
{
apr_datum_t key;
key.dptr = htdbm->username;
key.dsize = strlen(htdbm->username);
if (!apr_dbm_exists(htdbm->dbm, key))
return APR_ENOENT;
return apr_dbm_delete(htdbm->dbm, key);
}
static apr_status_t htdbm_verify(htdbm_t *htdbm)
{
apr_datum_t key, val;
char pwd[MAX_STRING_LEN] = {0};
char *rec, *cmnt;
key.dptr = htdbm->username;
key.dsize = strlen(htdbm->username);
if (!apr_dbm_exists(htdbm->dbm, key))
return APR_ENOENT;
if (apr_dbm_fetch(htdbm->dbm, key, &val) != APR_SUCCESS)
return APR_ENOENT;
rec = apr_pstrndup(htdbm->pool, val.dptr, val.dsize);
cmnt = strchr(rec, ';');
if (cmnt)
strncpy(pwd, rec, cmnt - rec);
else
strcpy(pwd, rec);
return apr_password_validate(htdbm->userpass, pwd);
}
static apr_status_t htdbm_list(htdbm_t *htdbm)
{
apr_status_t rv;
apr_datum_t key, val;
char *rec, *cmnt;
char kb[MAX_STRING_LEN];
int i = 0;
rv = apr_dbm_firstkey(htdbm->dbm, &key);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Empty database -- %s\n", htdbm->filename);
return APR_ENOENT;
}
rec = apr_pcalloc(htdbm->pool, HUGE_STRING_LEN);
fprintf(stderr, "Dumping records from database -- %s\n", htdbm->filename);
fprintf(stderr, " %-32sComment\n", "Username");
while (key.dptr != NULL) {
rv = apr_dbm_fetch(htdbm->dbm, key, &val);
if (rv != APR_SUCCESS) {
fprintf(stderr, "Failed getting data from %s\n", htdbm->filename);
return APR_EGENERAL;
}
strncpy(kb, key.dptr, key.dsize);
kb[key.dsize] = '\0';
fprintf(stderr, " %-32s", kb);
strncpy(rec, val.dptr, val.dsize);
rec[val.dsize] = '\0';
cmnt = strchr(rec, ':');
if (cmnt)
fprintf(stderr, cmnt + 1);
fprintf(stderr, "\n");
rv = apr_dbm_nextkey(htdbm->dbm, &key);
if (rv != APR_SUCCESS)
fprintf(stderr, "Failed getting NextKey\n");
++i;
}
fprintf(stderr, "Total #records : %d\n", i);
return APR_SUCCESS;
}
static void to64(char *s, unsigned long v, int n)
{
static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
while (--n >= 0) {
*s++ = itoa64[v&0x3f];
v >>= 6;
}
}
static apr_status_t htdbm_make(htdbm_t *htdbm)
{
char cpw[MAX_STRING_LEN];
char salt[9];
switch (htdbm->alg) {
case ALG_APSHA:
/* XXX cpw >= 28 + strlen(sha1) chars - fixed len SHA */
apr_sha1_base64(htdbm->userpass,strlen(htdbm->userpass),cpw);
break;
case ALG_APMD5:
(void) srand((int) time((time_t *) NULL));
to64(&salt[0], rand(), 8);
salt[8] = '\0';
apr_md5_encode((const char *)htdbm->userpass, (const char *)salt,
cpw, sizeof(cpw));
break;
case ALG_PLAIN:
/* XXX this len limitation is not in sync with any HTTPd len. */
apr_cpystrn(cpw,htdbm->userpass,sizeof(cpw));
break;
#if APR_HAVE_CRYPT_H
case ALG_CRYPT:
(void) srand((int) time((time_t *) NULL));
to64(&salt[0], rand(), 8);
salt[8] = '\0';
apr_cpystrn(cpw, (char *)crypt(htdbm->userpass, salt), sizeof(cpw) - 1);
fprintf(stderr, "CRYPT is now deprecated, use MD5 instead!\n");
#endif
default:
break;
}
htdbm->userpass = apr_pstrdup(htdbm->pool, cpw);
return APR_SUCCESS;
}
static apr_status_t htdbm_valid_username(htdbm_t *htdbm)
{
if (!htdbm->username || (strlen(htdbm->username) > 64) || (strlen(htdbm->username) < 1)) {
fprintf(stderr, "Invalid username length\n");
return APR_EINVAL;
}
if (strchr(htdbm->username, ':')) {
fprintf(stderr, "Username contains invalid characters\n");
return APR_EINVAL;
}
return APR_SUCCESS;
}
static void htdbm_usage(void)
{
#if APR_HAVE_CRYPT_H
#define CRYPT_OPTION "d"
#else
#define CRYPT_OPTION ""
#endif
fprintf(stderr, "htdbm -- program for manipulating DBM password databases.\n\n");
fprintf(stderr, "Usage: htdbm [-cm"CRYPT_OPTION"pstvx] [-TDBTYPE] database username\n");
fprintf(stderr, " -b[cm"CRYPT_OPTION"ptsv] [-TDBTYPE] database username password\n");
fprintf(stderr, " -n[m"CRYPT_OPTION"pst] username\n");
fprintf(stderr, " -nb[m"CRYPT_OPTION"pst] username password\n");
fprintf(stderr, " -v[m"CRYPT_OPTION"ps] [-TDBTYPE] database username\n");
fprintf(stderr, " -vb[m"CRYPT_OPTION"ps] [-TDBTYPE] database username password\n");
fprintf(stderr, " -x[m"CRYPT_OPTION"ps] [-TDBTYPE] database username\n");
fprintf(stderr, " -l [-TDBTYPE] database\n");
fprintf(stderr, "Options:\n");
fprintf(stderr, " -b Use the password from the command line rather "
"than prompting for it.\n");
fprintf(stderr, " -c Create a new database.\n");
fprintf(stderr, " -n Don't update database; display results on stdout.\n");
fprintf(stderr, " -m Force MD5 encryption of the password (default).\n");
#if APR_HAVE_CRYPT_H
fprintf(stderr, " -d Force CRYPT encryption of the password (now deprecated).\n");
#endif
fprintf(stderr, " -p Do not encrypt the password (plaintext).\n");
fprintf(stderr, " -s Force SHA encryption of the password.\n");
fprintf(stderr, " -T DBM Type (SDBM|GDBM|DB|default).\n");
fprintf(stderr, " -l Display usernames from database on stdout.\n");
fprintf(stderr, " -t The last param is username comment.\n");
fprintf(stderr, " -v Verify the username/password.\n");
fprintf(stderr, " -x Remove the username record from database.\n");
exit(ERR_SYNTAX);
}
int main(int argc, const char * const argv[])
{
apr_pool_t *pool;
apr_status_t rv;
apr_size_t l;
char pwi[MAX_STRING_LEN];
char pwc[MAX_STRING_LEN];
char errbuf[MAX_STRING_LEN];
const char *arg;
int need_file = 1;
int need_user = 1;
int need_pwd = 1;
int need_cmnt = 0;
int pwd_supplied = 0;
int changed;
int cmd = HTDBM_MAKE;
int i;
int args_left = 2;
apr_app_initialize(&argc, &argv, NULL);
atexit(terminate);
if ((rv = htdbm_init(&pool, &h)) != APR_SUCCESS) {
fprintf(stderr, "Unable to initialize htdbm terminating!\n");
apr_strerror(rv, errbuf, sizeof(errbuf));
exit(1);
}
/*
* Preliminary check to make sure they provided at least
* three arguments, we'll do better argument checking as
* we parse the command line.
*/
if (argc < 3)
htdbm_usage();
/*
* Go through the argument list and pick out any options. They
* have to precede any other arguments.
*/
for (i = 1; i < argc; i++) {
arg = argv[i];
if (*arg != '-')
break;
while (*++arg != '\0') {
switch (*arg) {
case 'b':
pwd_supplied = 1;
need_pwd = 0;
args_left++;
break;
case 'c':
h->create = 1;
break;
case 'n':
need_file = 0;
cmd = HTDBM_NOFILE;
args_left--;
break;
case 'l':
need_pwd = 0;
need_user = 0;
cmd = HTDBM_LIST;
h->rdonly = 1;
args_left--;
break;
case 't':
need_cmnt = 1;
args_left++;
break;
case 'T':
h->type = apr_pstrdup(h->pool, ++arg);
while (*arg != '\0')
++arg;
--arg; /* so incrementing this in the loop with find a null */
break;
case 'v':
h->rdonly = 1;
cmd = HTDBM_VERIFY;
break;
case 'x':
need_pwd = 0;
cmd = HTDBM_DELETE;
break;
case 'm':
h->alg = ALG_APMD5;
break;
case 'p':
h->alg = ALG_PLAIN;
break;
case 's':
h->alg = ALG_APSHA;
break;
#if APR_HAVE_CRYPT_H
case 'd':
h->alg = ALG_CRYPT;
break;
#endif
default:
htdbm_usage();
break;
}
}
}
/*
* Make sure we still have exactly the right number of arguments left
* (the filename, the username, and possibly the password if -b was
* specified).
*/
if ((argc - i) != args_left)
htdbm_usage();
if (!need_file)
i--;
else {
h->filename = apr_pstrdup(h->pool, argv[i]);
if ((rv = htdbm_open(h)) != APR_SUCCESS) {
fprintf(stderr, "Error opening database %s\n", argv[i]);
apr_strerror(rv, errbuf, sizeof(errbuf));
fprintf(stderr,"%s\n",errbuf);
exit(ERR_FILEPERM);
}
}
if (need_user) {
h->username = apr_pstrdup(pool, argv[i+1]);
if (htdbm_valid_username(h) != APR_SUCCESS)
exit(ERR_BADUSER);
}
if (pwd_supplied)
h->userpass = apr_pstrdup(pool, argv[i+2]);
if (need_pwd) {
l = sizeof(pwc);
if (apr_password_get("Enter password : ", pwi, &l) != APR_SUCCESS) {
fprintf(stderr, "Password too long\n");
exit(ERR_OVERFLOW);
}
l = sizeof(pwc);
if (apr_password_get("Re-type password : ", pwc, &l) != APR_SUCCESS) {
fprintf(stderr, "Password too long\n");
exit(ERR_OVERFLOW);
}
if (strcmp(pwi, pwc) != 0) {
fprintf(stderr, "Password verification error\n");
exit(ERR_PWMISMATCH);
}
h->userpass = apr_pstrdup(pool, pwi);
}
if (need_cmnt && pwd_supplied)
h->comment = apr_pstrdup(pool, argv[i+3]);
else if (need_cmnt)
h->comment = apr_pstrdup(pool, argv[i+2]);
switch (cmd) {
case HTDBM_VERIFY:
if ((rv = htdbm_verify(h)) != APR_SUCCESS) {
if(rv == APR_ENOENT) {
fprintf(stderr, "The user '%s' could not be found in database\n", h->username);
exit(ERR_BADUSER);
}
else {
fprintf(stderr, "Password mismatch for user '%s'\n", h->username);
exit(ERR_PWMISMATCH);
}
}
else
fprintf(stderr, "Password validated for user '%s'\n", h->username);
break;
case HTDBM_DELETE:
if (htdbm_del(h) != APR_SUCCESS) {
fprintf(stderr, "Cannot find user '%s' in database\n", h->username);
exit(ERR_BADUSER);
}
h->username = NULL;
changed = 1;
break;
case HTDBM_LIST:
htdbm_list(h);
break;
default:
htdbm_make(h);
break;
}
if (need_file && !h->rdonly) {
if ((rv = htdbm_save(h, &changed)) != APR_SUCCESS) {
apr_strerror(rv, errbuf, sizeof(errbuf));
exit(ERR_FILEPERM);
}
fprintf(stdout, "Database %s %s.\n", h->filename,
h->create ? "created" : (changed ? "modified" : "updated"));
}
if (cmd == HTDBM_NOFILE) {
if (!need_cmnt) {
fprintf(stderr, "%s:%s\n", h->username, h->userpass);
}
else {
fprintf(stderr, "%s:%s:%s\n", h->username, h->userpass,
h->comment);
}
}
htdbm_terminate(h);
return 0; /* Suppress compiler warning. */
}
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