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/* ====================================================================
* Copyright (c) 2003 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS 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.
*
*/
#include <openssl/fips.h>
#include <openssl/rand.h>
#include <openssl/fips_rand.h>
#include <openssl/err.h>
#include <openssl/bio.h>
#include <openssl/hmac.h>
#include <string.h>
#include <limits.h>
#include "fips_locl.h"
#ifdef OPENSSL_FIPS
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
static int fips_md5_allowed = 0;
static int fips_selftest_fail = 0;
void FIPS_allow_md5(int onoff)
{
if (fips_is_started())
{
int owning_thread = fips_is_owning_thread();
if (!owning_thread) CRYPTO_w_lock(CRYPTO_LOCK_FIPS);
fips_md5_allowed = onoff;
if (!owning_thread) CRYPTO_w_unlock(CRYPTO_LOCK_FIPS);
}
}
int FIPS_md5_allowed(void)
{
int ret = 1;
if (fips_is_started())
{
int owning_thread = fips_is_owning_thread();
if (!owning_thread) CRYPTO_r_lock(CRYPTO_LOCK_FIPS);
ret = fips_md5_allowed;
if (!owning_thread) CRYPTO_r_unlock(CRYPTO_LOCK_FIPS);
}
return ret;
}
int FIPS_selftest_failed(void)
{
int ret = 0;
if (fips_is_started())
{
int owning_thread = fips_is_owning_thread();
if (!owning_thread) CRYPTO_r_lock(CRYPTO_LOCK_FIPS);
ret = fips_selftest_fail;
if (!owning_thread) CRYPTO_r_unlock(CRYPTO_LOCK_FIPS);
}
return ret;
}
int FIPS_selftest()
{
ERR_load_crypto_strings();
return FIPS_selftest_sha1()
&& FIPS_selftest_aes()
&& FIPS_selftest_des()
&& FIPS_selftest_rsa()
&& FIPS_selftest_dsa();
}
static int FIPS_check_exe(const char *path)
{
unsigned char buf[1024];
char p2[PATH_MAX];
unsigned int n;
unsigned char mdbuf[EVP_MAX_MD_SIZE];
FILE *f;
static char key[]="etaonrishdlcupfm";
HMAC_CTX hmac;
f=fopen(path,"rb");
if(!f)
{
FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
return 0;
}
HMAC_Init(&hmac,key,strlen(key),EVP_sha1());
do
{
n=fread(buf,1,sizeof buf,f);
if(n < 0)
{
fclose(f);
FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
return 0;
}
HMAC_Update(&hmac,buf,n);
} while(n > 0);
fclose(f);
HMAC_Final(&hmac,mdbuf,&n);
BIO_snprintf(p2,sizeof p2,"%s.sha1",path);
f=fopen(p2,"rb");
if(!f || fread(buf,1,20,f) != 20)
{
if (f) fclose(f);
FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE_DIGEST);
return 0;
}
fclose(f);
if(memcmp(buf,mdbuf,20))
{
FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_EXE_DIGEST_DOES_NOT_MATCH);
return 0;
}
return 1;
}
int FIPS_mode_set(int onoff,const char *path)
{
void fips_set_mode(int _onoff);
int fips_set_owning_thread();
int fips_clear_owning_thread();
int ret = 0;
CRYPTO_w_lock(CRYPTO_LOCK_FIPS);
fips_set_started();
fips_set_owning_thread();
if(onoff)
{
unsigned char buf[24];
fips_selftest_fail = 0;
/* Don't go into FIPS mode twice, just so we can do automagic
seeding */
if(FIPS_mode())
{
FIPSerr(FIPS_F_FIPS_MODE_SET,FIPS_R_FIPS_MODE_ALREADY_SET);
fips_selftest_fail = 1;
ret = 0;
goto end;
}
if(!FIPS_check_exe(path))
{
fips_selftest_fail = 1;
ret = 0;
goto end;
}
/* automagically seed PRNG if not already seeded */
if(!FIPS_rand_seeded())
{
if(RAND_bytes(buf,sizeof buf) <= 0)
{
fips_selftest_fail = 1;
ret = 0;
goto end;
}
FIPS_set_prng_key(buf,buf+8);
FIPS_rand_seed(buf+16,8);
}
/* now switch into FIPS mode */
fips_set_rand_check(FIPS_rand_method());
RAND_set_rand_method(FIPS_rand_method());
if(FIPS_selftest())
fips_set_mode(1);
else
{
fips_selftest_fail = 1;
ret = 0;
goto end;
}
ret = 1;
goto end;
}
fips_set_mode(0);
fips_selftest_fail = 0;
ret = 1;
end:
fips_clear_owning_thread();
CRYPTO_w_unlock(CRYPTO_LOCK_FIPS);
return ret;
}
#if 0
/* here just to cause error codes to exist */
static void dummy()
{
FIPSerr(FIPS_F_HASH_FINAL,FIPS_F_NON_FIPS_METHOD);
FIPSerr(FIPS_F_HASH_FINAL,FIPS_R_FIPS_SELFTEST_FAILED);
}
#endif
#endif
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