366 lines
8.4 KiB
C
366 lines
8.4 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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ERR_load_crypto_strings();
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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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#ifndef HMAC_EXT
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#define HMAC_EXT "sha1"
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#endif
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static char key[]="etaonrishdlcupfm";
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#ifdef OPENSSL_PIC
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int DSO_pathbyaddr(void *addr,char *path,int sz);
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static int FIPS_check_dso()
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{
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unsigned char buf[1024];
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char path [512];
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unsigned char mdbuf[EVP_MAX_MD_SIZE];
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FILE *f;
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HMAC_CTX hmac;
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int len,n;
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len = DSO_pathbyaddr(NULL,path,sizeof(path)-sizeof(HMAC_EXT));
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if (len<=0)
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{
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FIPSerr(FIPS_F_FIPS_CHECK_DSO,FIPS_R_NO_DSO_PATH);
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return 0;
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}
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f=fopen(path,"rb");
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if(!f)
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{
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
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return 0;
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}
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HMAC_Init(&hmac,key,strlen(key),EVP_sha1());
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while(!feof(f))
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{
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n=fread(buf,1,sizeof buf,f);
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if(ferror(f))
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{
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clearerr(f);
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fclose(f);
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
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return 0;
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}
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if (n) HMAC_Update(&hmac,buf,n);
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}
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fclose(f);
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HMAC_Final(&hmac,mdbuf,&n);
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HMAC_CTX_cleanup(&hmac);
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path[len-1]='.';
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strcpy(path+len,HMAC_EXT);
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f=fopen(path,"rb");
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if(!f || fread(buf,1,20,f) != 20)
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{
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if (f) fclose(f);
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE_DIGEST);
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return 0;
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}
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fclose(f);
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if(memcmp(buf,mdbuf,20))
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{
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_EXE_DIGEST_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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#else
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static int FIPS_check_exe(const char *path)
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{
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unsigned char buf[1024];
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char p2[PATH_MAX];
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unsigned int n;
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unsigned char mdbuf[EVP_MAX_MD_SIZE];
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FILE *f;
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HMAC_CTX hmac;
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const char *sha1_fmt="%s."HMAC_EXT;
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f=fopen(path,"rb");
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#ifdef __CYGWIN32__
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/* cygwin scrupulously strips .exe extentions:-( as of now it's
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actually no point to attempt above fopen, but we keep the call
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just in case the behavior changes in the future... */
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if (!f)
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{
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sha1_fmt="%s.exe."HMAC_EXT;
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BIO_snprintf(p2,sizeof p2,"%s.exe",path);
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f=fopen(p2,"rb");
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}
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#endif
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if(!f)
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{
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
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return 0;
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}
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HMAC_Init(&hmac,key,strlen(key),EVP_sha1());
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while(!feof(f))
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{
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n=fread(buf,1,sizeof buf,f);
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if(ferror(f))
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{
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clearerr(f);
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fclose(f);
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE);
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return 0;
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}
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if (n) HMAC_Update(&hmac,buf,n);
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}
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fclose(f);
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HMAC_Final(&hmac,mdbuf,&n);
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HMAC_CTX_cleanup(&hmac);
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BIO_snprintf(p2,sizeof p2,sha1_fmt,path);
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f=fopen(p2,"rb");
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if(!f || fread(buf,1,20,f) != 20)
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{
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if (f) fclose(f);
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_CANNOT_READ_EXE_DIGEST);
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return 0;
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}
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fclose(f);
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if(memcmp(buf,mdbuf,20))
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{
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FIPSerr(FIPS_F_FIPS_CHECK_EXE,FIPS_R_EXE_DIGEST_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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#endif
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int FIPS_mode_set(int onoff,const char *path)
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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[24];
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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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#ifdef OPENSSL_PIC
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if(!FIPS_check_dso())
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#else
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if(!FIPS_check_exe(path))
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#endif
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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_seeded())
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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_set_prng_key(buf,buf+8);
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FIPS_rand_seed(buf+16,8);
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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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#endif
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