384 lines
9.1 KiB
C
384 lines
9.1 KiB
C
/* ====================================================================
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* Copyright (c) 2003 The OpenSSL Project. 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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <openssl/fips.h>
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#include <openssl/rand.h>
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#include <openssl/fips_rand.h>
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#include <openssl/err.h>
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#include <openssl/bio.h>
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#include <openssl/hmac.h>
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#include <string.h>
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#include <limits.h>
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#include "fips_locl.h"
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#ifdef OPENSSL_FIPS
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#ifndef PATH_MAX
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#define PATH_MAX 1024
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#endif
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static int fips_selftest_fail;
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static int fips_mode;
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static const void *fips_rand_check;
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static void fips_set_mode(int onoff)
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{
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int owning_thread = fips_is_owning_thread();
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if (fips_is_started())
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{
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if (!owning_thread) fips_w_lock();
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fips_mode = onoff;
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if (!owning_thread) fips_w_unlock();
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}
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}
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static void fips_set_rand_check(const void *rand_check)
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{
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int owning_thread = fips_is_owning_thread();
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if (fips_is_started())
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{
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if (!owning_thread) fips_w_lock();
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fips_rand_check = rand_check;
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if (!owning_thread) fips_w_unlock();
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}
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}
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int FIPS_mode(void)
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{
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int ret = 0;
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int owning_thread = fips_is_owning_thread();
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if (fips_is_started())
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{
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if (!owning_thread) fips_r_lock();
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ret = fips_mode;
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if (!owning_thread) fips_r_unlock();
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}
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return ret;
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}
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const void *FIPS_rand_check(void)
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{
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const void *ret = 0;
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int owning_thread = fips_is_owning_thread();
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if (fips_is_started())
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{
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if (!owning_thread) fips_r_lock();
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ret = fips_rand_check;
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if (!owning_thread) fips_r_unlock();
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}
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return ret;
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}
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int FIPS_selftest_failed(void)
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{
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int ret = 0;
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if (fips_is_started())
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{
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int owning_thread = fips_is_owning_thread();
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if (!owning_thread) fips_r_lock();
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ret = fips_selftest_fail;
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if (!owning_thread) fips_r_unlock();
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}
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return ret;
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}
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int FIPS_selftest()
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{
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return FIPS_selftest_sha1()
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&& FIPS_selftest_hmac()
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&& FIPS_selftest_aes()
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&& FIPS_selftest_des()
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&& FIPS_selftest_rsa()
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&& FIPS_selftest_dsa();
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}
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extern const void *FIPS_text_start(), *FIPS_text_end();
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extern const unsigned char FIPS_rodata_start[], FIPS_rodata_end[];
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unsigned char FIPS_signature [20] = { 0 };
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static const char FIPS_hmac_key[]="etaonrishdlcupfm";
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unsigned int FIPS_incore_fingerprint(unsigned char *sig,unsigned int len)
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{
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const unsigned char *p1 = FIPS_text_start();
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const unsigned char *p2 = FIPS_text_end();
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const unsigned char *p3 = FIPS_rodata_start;
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const unsigned char *p4 = FIPS_rodata_end;
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HMAC_CTX c;
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HMAC_CTX_init(&c);
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HMAC_Init(&c,FIPS_hmac_key,strlen(FIPS_hmac_key),EVP_sha1());
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/* detect overlapping regions */
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if (p1<=p3 && p2>=p3)
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p3=p1, p4=p2>p4?p2:p4, p1=NULL, p2=NULL;
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else if (p3<=p1 && p4>=p1)
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p3=p3, p4=p2>p4?p2:p4, p1=NULL, p2=NULL;
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if (p1)
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HMAC_Update(&c,p1,(size_t)p2-(size_t)p1);
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if (FIPS_signature>=p3 && FIPS_signature<p4)
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{
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/* "punch" hole */
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HMAC_Update(&c,p3,(size_t)FIPS_signature-(size_t)p3);
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p3 = FIPS_signature+sizeof(FIPS_signature);
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if (p3<p4)
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HMAC_Update(&c,p3,(size_t)p4-(size_t)p3);
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}
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else
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HMAC_Update(&c,p3,(size_t)p4-(size_t)p3);
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HMAC_Final(&c,sig,&len);
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HMAC_CTX_cleanup(&c);
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return len;
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}
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int FIPS_check_incore_fingerprint(void)
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{
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unsigned char sig[EVP_MAX_MD_SIZE];
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unsigned int len;
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extern int OPENSSL_NONPIC_relocated;
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if (FIPS_text_start()==NULL)
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{
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FIPSerr(FIPS_F_FIPS_CHECK_FINGERPRINT,FIPS_R_UNSUPPORTED_PLATFORM);
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return 0;
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}
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len=FIPS_incore_fingerprint (sig,sizeof(sig));
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if (len!=sizeof(FIPS_signature) ||
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memcmp(FIPS_signature,sig,sizeof(FIPS_signature)))
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{
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if (FIPS_signature>=FIPS_rodata_start && FIPS_signature<FIPS_rodata_end)
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FIPSerr(FIPS_F_FIPS_CHECK_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH_SEGMENT_ALIASING);
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else if (OPENSSL_NONPIC_relocated)
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FIPSerr(FIPS_F_FIPS_CHECK_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH_NONPIC_RELOCATED);
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else
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FIPSerr(FIPS_F_FIPS_CHECK_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH);
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return 0;
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}
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return 1;
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}
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int FIPS_mode_set(int onoff)
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{
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int fips_set_owning_thread();
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int fips_clear_owning_thread();
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int ret = 0;
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fips_w_lock();
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fips_set_started();
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fips_set_owning_thread();
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if(onoff)
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{
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unsigned char buf[48];
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fips_selftest_fail = 0;
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/* Don't go into FIPS mode twice, just so we can do automagic
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seeding */
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if(FIPS_mode())
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{
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FIPSerr(FIPS_F_FIPS_MODE_SET,FIPS_R_FIPS_MODE_ALREADY_SET);
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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if(fips_signature_witness() != FIPS_signature)
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{
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FIPSerr(FIPS_F_FIPS_MODE_SET,FIPS_R_CONTRADICTING_EVIDENCE);
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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if(!FIPS_check_incore_fingerprint())
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{
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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/* Perform RNG KAT before seeding */
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if (!FIPS_selftest_rng())
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{
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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/* automagically seed PRNG if not already seeded */
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if(!FIPS_rand_status())
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{
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if(RAND_bytes(buf,sizeof buf) <= 0)
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{
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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FIPS_rand_set_key(buf,32);
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FIPS_rand_seed(buf+32,16);
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}
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/* now switch into FIPS mode */
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fips_set_rand_check(FIPS_rand_method());
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RAND_set_rand_method(FIPS_rand_method());
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if(FIPS_selftest())
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fips_set_mode(1);
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else
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{
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fips_selftest_fail = 1;
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ret = 0;
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goto end;
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}
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ret = 1;
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goto end;
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}
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fips_set_mode(0);
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fips_selftest_fail = 0;
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ret = 1;
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end:
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fips_clear_owning_thread();
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fips_w_unlock();
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return ret;
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}
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#if 0
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/* here just to cause error codes to exist */
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static void dummy()
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{
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FIPSerr(FIPS_F_HASH_FINAL,FIPS_F_NON_FIPS_METHOD);
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FIPSerr(FIPS_F_HASH_FINAL,FIPS_R_FIPS_SELFTEST_FAILED);
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}
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#endif
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void fips_w_lock(void) { CRYPTO_w_lock(CRYPTO_LOCK_FIPS); }
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void fips_w_unlock(void) { CRYPTO_w_unlock(CRYPTO_LOCK_FIPS); }
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void fips_r_lock(void) { CRYPTO_r_lock(CRYPTO_LOCK_FIPS); }
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void fips_r_unlock(void) { CRYPTO_r_unlock(CRYPTO_LOCK_FIPS); }
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static int fips_started = 0;
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static unsigned long fips_thread = 0;
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void fips_set_started(void)
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{
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fips_started = 1;
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}
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int fips_is_started(void)
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{
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return fips_started;
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}
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int fips_is_owning_thread(void)
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{
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int ret = 0;
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if (fips_is_started())
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{
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CRYPTO_r_lock(CRYPTO_LOCK_FIPS2);
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if (fips_thread != 0 && fips_thread == CRYPTO_thread_id())
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ret = 1;
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CRYPTO_r_unlock(CRYPTO_LOCK_FIPS2);
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}
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return ret;
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}
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int fips_set_owning_thread(void)
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{
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int ret = 0;
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if (fips_is_started())
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{
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CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
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if (fips_thread == 0)
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{
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fips_thread = CRYPTO_thread_id();
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ret = 1;
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
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}
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return ret;
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}
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int fips_clear_owning_thread(void)
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{
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int ret = 0;
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if (fips_is_started())
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{
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CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
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if (fips_thread == CRYPTO_thread_id())
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{
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fips_thread = 0;
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ret = 1;
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_FIPS2);
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}
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return ret;
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}
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unsigned char *fips_signature_witness(void)
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{
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extern unsigned char FIPS_signature[];
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return FIPS_signature;
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}
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#endif
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