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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
#include "apr_strings.h"
#include "apr_md5.h"
#include "apr_lib.h"
#include "apr_private.h"
#include "apr_sha1.h"
#include "crypt_blowfish.h"
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_CRYPT_H
#include <crypt.h>
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
#if APR_HAVE_PTHREAD_H
#include <pthread.h>
#endif
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
static const char * const apr1_id = "$apr1$";
#if !defined(WIN32) && !defined(BEOS) && !defined(NETWARE)
#if defined(APU_CRYPT_THREADSAFE) || !APR_HAS_THREADS || \
defined(CRYPT_R_CRYPTD) || defined(CRYPT_R_STRUCT_CRYPT_DATA)
#define crypt_mutex_lock()
#define crypt_mutex_unlock()
#elif APR_HAVE_PTHREAD_H && defined(PTHREAD_MUTEX_INITIALIZER)
static pthread_mutex_t crypt_mutex = PTHREAD_MUTEX_INITIALIZER;
static void crypt_mutex_lock(void)
{
pthread_mutex_lock(&crypt_mutex);
}
static void crypt_mutex_unlock(void)
{
pthread_mutex_unlock(&crypt_mutex);
}
#elif defined(OS2)
static HMTX crypt_mutex = 0;
static void crypt_mutex_lock()
{
if (crypt_mutex == 0) {
/* Prevent race condition where two threads could try to create the
* mutex concurrently
*/
DosEnterCritSec();
if (crypt_mutex == 0) {
DosCreateMutexSem(NULL, &crypt_mutex, 0, FALSE);
}
DosExitCritSec();
}
DosRequestMutexSem(crypt_mutex, SEM_INDEFINITE_WAIT);
}
static void crypt_mutex_unlock()
{
DosReleaseMutexSem(crypt_mutex);
}
#else
#error apr_password_validate() is not threadsafe. rebuild APR without thread support.
#endif
#endif
#if defined(WIN32) || defined(BEOS) || defined(NETWARE) || defined(__ANDROID__)
#define CRYPT_MISSING 1
#else
#define CRYPT_MISSING 0
#endif
/*
* Validate a plaintext password against a smashed one. Uses either
* crypt() (if available) or apr_md5_encode() or apr_sha1_base64(), depending
* upon the format of the smashed input password. Returns APR_SUCCESS if
* they match, or APR_EMISMATCH if they don't. If the platform doesn't
* support crypt, then the default check is against a clear text string.
*/
APR_DECLARE(apr_status_t) apr_password_validate(const char *passwd,
const char *hash)
{
char sample[200];
#if !CRYPT_MISSING
char *crypt_pw;
#endif
if (hash[0] == '$'
&& hash[1] == '2'
&& (hash[2] == 'a' || hash[2] == 'y')
&& hash[3] == '$') {
if (_crypt_blowfish_rn(passwd, hash, sample, sizeof(sample)) == NULL)
return APR_FROM_OS_ERROR(errno);
}
else if (!strncmp(hash, apr1_id, strlen(apr1_id))) {
/*
* The hash was created using our custom algorithm.
*/
apr_md5_encode(passwd, hash, sample, sizeof(sample));
}
else if (!strncmp(hash, APR_SHA1PW_ID, APR_SHA1PW_IDLEN)) {
apr_sha1_base64(passwd, (int)strlen(passwd), sample);
}
else {
/*
* It's not our algorithm, so feed it to crypt() if possible.
*/
#if CRYPT_MISSING
return (strcmp(passwd, hash) == 0) ? APR_SUCCESS : APR_EMISMATCH;
#elif defined(CRYPT_R_CRYPTD)
apr_status_t rv;
CRYPTD *buffer = malloc(sizeof(*buffer));
if (buffer == NULL)
return APR_ENOMEM;
crypt_pw = crypt_r(passwd, hash, buffer);
if (!crypt_pw)
rv = APR_EMISMATCH;
else
rv = (strcmp(crypt_pw, hash) == 0) ? APR_SUCCESS : APR_EMISMATCH;
free(buffer);
return rv;
#elif defined(CRYPT_R_STRUCT_CRYPT_DATA)
apr_status_t rv;
struct crypt_data *buffer = malloc(sizeof(*buffer));
if (buffer == NULL)
return APR_ENOMEM;
#ifdef __GLIBC_PREREQ
/*
* For not too old glibc (>= 2.3.2), it's enough to set
* buffer.initialized = 0. For < 2.3.2 and for other platforms,
* we need to zero the whole struct.
*/
#if __GLIBC_PREREQ(2,4)
#define USE_CRYPT_DATA_INITALIZED
#endif
#endif
#ifdef USE_CRYPT_DATA_INITALIZED
buffer->initialized = 0;
#else
memset(buffer, 0, sizeof(*buffer));
#endif
crypt_pw = crypt_r(passwd, hash, buffer);
if (!crypt_pw)
rv = APR_EMISMATCH;
else
rv = (strcmp(crypt_pw, hash) == 0) ? APR_SUCCESS : APR_EMISMATCH;
free(buffer);
return rv;
#else
/* Do a bit of sanity checking since we know that crypt_r()
* should always be used for threaded builds on AIX, and
* problems in configure logic can result in the wrong
* choice being made.
*/
#if defined(_AIX) && APR_HAS_THREADS
#error Configuration error! crypt_r() should have been selected!
#endif
{
apr_status_t rv;
/* Handle thread safety issues by holding a mutex around the
* call to crypt().
*/
crypt_mutex_lock();
crypt_pw = crypt(passwd, hash);
if (!crypt_pw) {
rv = APR_EMISMATCH;
}
else {
rv = (strcmp(crypt_pw, hash) == 0) ? APR_SUCCESS : APR_EMISMATCH;
}
crypt_mutex_unlock();
return rv;
}
#endif
}
return (strcmp(sample, hash) == 0) ? APR_SUCCESS : APR_EMISMATCH;
}
static const char * const bcrypt_id = "$2y$";
APR_DECLARE(apr_status_t) apr_bcrypt_encode(const char *pw,
unsigned int count,
const unsigned char *salt,
apr_size_t salt_len,
char *out, apr_size_t out_len)
{
char setting[40];
if (_crypt_gensalt_blowfish_rn(bcrypt_id, count, (const char *)salt,
salt_len, setting, sizeof(setting)) == NULL)
return APR_FROM_OS_ERROR(errno);
if (_crypt_blowfish_rn(pw, setting, out, out_len) == NULL)
return APR_FROM_OS_ERROR(errno);
return APR_SUCCESS;
}
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