444 lines
11 KiB
C
444 lines
11 KiB
C
/* ====================================================================
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* Copyright (c) 2011 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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#define OPENSSL_FIPSAPI
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#include <openssl/crypto.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 <openssl/rsa.h>
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#include <openssl/dsa.h>
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#include <openssl/ecdsa.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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#include "fips_auth.h"
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#ifdef OPENSSL_FIPS
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#include <openssl/fips.h>
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#ifndef PATH_MAX
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#define PATH_MAX 1024
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#endif
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#define atox(c) ((c)>='a'?((c)-'a'+10):((c)>='A'?(c)-'A'+10:(c)-'0'))
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static int fips_selftest_fail = 0;
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static int fips_auth_fail = 0;
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static int fips_mode = 0;
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static int fips_started = 0;
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static int fips_is_owning_thread(void);
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static int fips_set_owning_thread(void);
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static int fips_clear_owning_thread(void);
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static unsigned char *fips_signature_witness(void);
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#define fips_w_lock() CRYPTO_w_lock(CRYPTO_LOCK_FIPS)
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#define fips_w_unlock() CRYPTO_w_unlock(CRYPTO_LOCK_FIPS)
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#define fips_r_lock() CRYPTO_r_lock(CRYPTO_LOCK_FIPS)
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#define fips_r_unlock() CRYPTO_r_unlock(CRYPTO_LOCK_FIPS)
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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_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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int FIPS_module_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_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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int FIPS_selftest_failed(void)
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{
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int ret = 0;
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if (fips_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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/* Selftest failure fatal exit routine. This will be called
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* during *any* cryptographic operation. It has the minimum
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* overhead possible to avoid too big a performance hit.
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*/
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void FIPS_selftest_check(void)
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{
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if (fips_selftest_fail)
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{
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OpenSSLDie(__FILE__,__LINE__, "FATAL FIPS SELFTEST FAILURE");
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}
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}
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void fips_set_selftest_fail(void)
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{
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fips_selftest_fail = 1;
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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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__fips_constseg
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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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if (!fips_post_corrupt(FIPS_TEST_INTEGRITY, 0, NULL))
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HMAC_Update(&c, (unsigned char *)FIPS_hmac_key, 1);
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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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int rv = 0;
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#if defined(__sgi) && (defined(__mips) || defined(mips))
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extern int __dso_displacement[];
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#else
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extern int OPENSSL_NONPIC_relocated;
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#endif
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if (!fips_post_started(FIPS_TEST_INTEGRITY, 0, NULL))
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return 1;
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if (FIPS_text_start()==NULL)
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{
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FIPSerr(FIPS_F_FIPS_CHECK_INCORE_FINGERPRINT,FIPS_R_UNSUPPORTED_PLATFORM);
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goto err;
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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_INCORE_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH_SEGMENT_ALIASING);
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#if defined(__sgi) && (defined(__mips) || defined(mips))
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else if (__dso_displacement!=NULL)
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#else
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else if (OPENSSL_NONPIC_relocated)
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#endif
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FIPSerr(FIPS_F_FIPS_CHECK_INCORE_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH_NONPIC_RELOCATED);
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else
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FIPSerr(FIPS_F_FIPS_CHECK_INCORE_FINGERPRINT,FIPS_R_FINGERPRINT_DOES_NOT_MATCH);
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#ifdef OPENSSL_FIPS_DEBUGGER
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rv = 1;
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#endif
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goto err;
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}
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rv = 1;
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err:
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if (rv == 0)
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fips_post_failed(FIPS_TEST_INTEGRITY, 0, NULL);
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else
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if (!fips_post_success(FIPS_TEST_INTEGRITY, 0, NULL))
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return 0;
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return rv;
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}
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static int fips_asc_check(const unsigned char *sig, const char *asc_sig)
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{
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char tsig[20];
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const char *p;
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int i;
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if (strlen(asc_sig) != 40)
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return 0;
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for (i = 0, p = asc_sig; i < 20; i++, p += 2)
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tsig[i] = (atox(p[0]) << 4) | atox(p[1]);
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if (memcmp(tsig, sig, 20))
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return 0;
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return 1;
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}
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static int fips_check_auth(const char *auth)
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{
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unsigned char auth_hmac[20];
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unsigned int hmac_len;
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if (fips_auth_fail)
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return 0;
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if (strlen(auth) < FIPS_AUTH_MIN_LEN)
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return 0;
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if (!HMAC(EVP_sha1(), FIPS_AUTH_KEY, strlen(FIPS_AUTH_KEY),
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(unsigned char *)auth, strlen(auth), auth_hmac, &hmac_len))
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return 0;
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if (hmac_len != sizeof(auth_hmac))
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return 0;
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if (fips_asc_check(auth_hmac, FIPS_AUTH_CRYPTO_OFFICER))
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return 1;
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if (fips_asc_check(auth_hmac, FIPS_AUTH_CRYPTO_USER))
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return 1;
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return 0;
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}
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int FIPS_module_mode_set(int onoff, const char *auth)
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{
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int ret = 0;
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fips_w_lock();
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fips_started = 1;
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fips_set_owning_thread();
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if(onoff)
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{
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fips_selftest_fail = 0;
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if (!fips_check_auth(auth))
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{
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fips_auth_fail = 1;
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fips_selftest_fail = 1;
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FIPSerr(FIPS_F_FIPS_MODULE_MODE_SET,FIPS_R_AUTHENTICATION_FAILURE);
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return 0;
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}
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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_module_mode())
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{
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FIPSerr(FIPS_F_FIPS_MODULE_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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#ifdef OPENSSL_IA32_SSE2
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{
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extern unsigned int OPENSSL_ia32cap_P[2];
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if ((OPENSSL_ia32cap_P[0] & (1<<25|1<<26)) != (1<<25|1<<26))
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{
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FIPSerr(FIPS_F_FIPS_MODULE_MODE_SET,FIPS_R_UNSUPPORTED_PLATFORM);
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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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OPENSSL_ia32cap_P[0] |= (1<<28); /* set "shared cache" */
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OPENSSL_ia32cap_P[1] &= ~(1<<(60-32)); /* clear AVX */
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}
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#endif
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if(fips_signature_witness() != FIPS_signature)
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{
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FIPSerr(FIPS_F_FIPS_MODULE_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_selftest())
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fips_set_mode(onoff);
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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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static CRYPTO_THREADID fips_thread;
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static int fips_thread_set = 0;
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static int fips_is_owning_thread(void)
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{
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int ret = 0;
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if (fips_started)
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{
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CRYPTO_r_lock(CRYPTO_LOCK_FIPS2);
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if (fips_thread_set)
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{
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CRYPTO_THREADID cur;
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CRYPTO_THREADID_current(&cur);
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if (!CRYPTO_THREADID_cmp(&cur, &fips_thread))
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ret = 1;
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}
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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_started)
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{
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CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
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if (!fips_thread_set)
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{
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CRYPTO_THREADID_current(&fips_thread);
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ret = 1;
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fips_thread_set = 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_started)
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{
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CRYPTO_w_lock(CRYPTO_LOCK_FIPS2);
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if (fips_thread_set)
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{
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CRYPTO_THREADID cur;
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CRYPTO_THREADID_current(&cur);
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if (!CRYPTO_THREADID_cmp(&cur, &fips_thread))
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fips_thread_set = 0;
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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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unsigned long FIPS_module_version(void)
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{
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return FIPS_MODULE_VERSION_NUMBER;
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}
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const char *FIPS_module_version_text(void)
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{
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return FIPS_MODULE_VERSION_TEXT;
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}
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#if 0
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/* The purpose of this is to ensure the error code exists and the function
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* name is to keep the error checking script quiet
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*/
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void hash_final(void)
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{
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FIPSerr(FIPS_F_HASH_FINAL,FIPS_R_NON_FIPS_METHOD);
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}
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#endif
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#endif
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