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/* ====================================================================
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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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/* If we don't define _XOPEN_SOURCE_EXTENDED, struct timeval won't
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be defined and gettimeofday() won't be declared with strict compilers
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like DEC C in ANSI C mode. */
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#ifndef _XOPEN_SOURCE_EXTENDED
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# define _XOPEN_SOURCE_EXTENDED 1
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#endif
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#include <openssl/crypto.h>
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#include <openssl/rand.h>
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#include <openssl/err.h>
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#include <openssl/fips.h>
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#include "crypto/fips.h"
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#include <openssl/fips_rand.h>
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#include "e_os.h"
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#if !(defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VXWORKS))
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# include <sys/time.h>
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#endif
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#if defined(OPENSSL_SYS_VXWORKS)
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# include <time.h>
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#endif
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#ifndef OPENSSL_SYS_WIN32
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# ifdef OPENSSL_UNISTD
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# include OPENSSL_UNISTD
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# else
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# include <unistd.h>
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# endif
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#endif
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/* FIPS API for PRNG use. Similar to RAND functionality but without
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* ENGINE and additional checking for non-FIPS rand methods.
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*/
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static const RAND_METHOD *fips_rand_meth = NULL;
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static int fips_approved_rand_meth = 0;
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static int fips_rand_bits = 0;
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/* Allows application to override number of bits and uses non-FIPS methods */
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void FIPS_rand_set_bits(int nbits)
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{
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fips_rand_bits = nbits;
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}
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int FIPS_rand_set_method(const RAND_METHOD *meth)
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{
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if (!fips_rand_bits) {
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if (meth == FIPS_drbg_method())
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fips_approved_rand_meth = 1;
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else {
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fips_approved_rand_meth = 0;
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if (FIPS_module_mode()) {
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FIPSerr(FIPS_F_FIPS_RAND_SET_METHOD, FIPS_R_NON_FIPS_METHOD);
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return 0;
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}
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}
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}
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fips_rand_meth = meth;
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return 1;
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}
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const RAND_METHOD *FIPS_rand_get_method(void)
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{
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return fips_rand_meth;
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}
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void FIPS_rand_reset(void)
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{
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if (fips_rand_meth && fips_rand_meth->cleanup)
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fips_rand_meth->cleanup();
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}
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int FIPS_rand_seed(const void *buf, int num)
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{
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#if 0
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if (!fips_approved_rand_meth && FIPS_module_mode()) {
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FIPSerr(FIPS_F_FIPS_RAND_SEED, FIPS_R_NON_FIPS_METHOD);
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return 0;
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}
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if (fips_rand_meth && fips_rand_meth->seed)
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fips_rand_meth->seed(buf, num);
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return 1;
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#else
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RAND_seed(buf, num);
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return 1;
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#endif
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}
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int FIPS_rand_bytes(unsigned char *buf, int num)
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{
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#if 0
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if (!fips_approved_rand_meth && FIPS_module_mode()) {
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FIPSerr(FIPS_F_FIPS_RAND_BYTES, FIPS_R_NON_FIPS_METHOD);
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return 0;
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}
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if (fips_rand_meth && fips_rand_meth->bytes)
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return fips_rand_meth->bytes(buf, num);
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return 0;
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#else
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return RAND_bytes(buf, num);
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#endif
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}
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int FIPS_rand_status(void)
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{
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#if 0
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if (!fips_approved_rand_meth && FIPS_module_mode()) {
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FIPSerr(FIPS_F_FIPS_RAND_STATUS, FIPS_R_NON_FIPS_METHOD);
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return 0;
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}
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if (fips_rand_meth && fips_rand_meth->status)
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return fips_rand_meth->status();
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return 0;
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#else
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return RAND_status();
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#endif
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}
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/* Return instantiated strength of PRNG. For DRBG this is an internal
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* parameter. Any other type of PRNG is not approved and returns 0 in
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* FIPS mode and maximum 256 outside FIPS mode.
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*/
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int FIPS_rand_strength(void)
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{
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if (fips_rand_bits)
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return fips_rand_bits;
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if (fips_approved_rand_meth == 1)
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return FIPS_drbg_get_strength(FIPS_get_default_drbg());
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else if (fips_approved_rand_meth == 0) {
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if (FIPS_module_mode())
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return 0;
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else
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return 256;
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}
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return 0;
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}
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void FIPS_get_timevec(unsigned char *buf, unsigned long *pctr)
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{
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# ifdef OPENSSL_SYS_WIN32
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FILETIME ft;
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# elif defined(OPENSSL_SYS_VXWORKS)
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struct timespec ts;
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# else
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struct timeval tv;
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# endif
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# ifndef GETPID_IS_MEANINGLESS
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unsigned long pid;
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# endif
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# ifdef OPENSSL_SYS_WIN32
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GetSystemTimeAsFileTime(&ft;;
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buf[0] = (unsigned char)(ft.dwHighDateTime & 0xff);
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buf[1] = (unsigned char)((ft.dwHighDateTime >> 8) & 0xff);
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buf[2] = (unsigned char)((ft.dwHighDateTime >> 16) & 0xff);
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buf[3] = (unsigned char)((ft.dwHighDateTime >> 24) & 0xff);
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buf[4] = (unsigned char)(ft.dwLowDateTime & 0xff);
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buf[5] = (unsigned char)((ft.dwLowDateTime >> 8) & 0xff);
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buf[6] = (unsigned char)((ft.dwLowDateTime >> 16) & 0xff);
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buf[7] = (unsigned char)((ft.dwLowDateTime >> 24) & 0xff);
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# elif defined(OPENSSL_SYS_VXWORKS)
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clock_gettime(CLOCK_REALTIME, &ts);
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buf[0] = (unsigned char)(ts.tv_sec & 0xff);
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buf[1] = (unsigned char)((ts.tv_sec >> 8) & 0xff);
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buf[2] = (unsigned char)((ts.tv_sec >> 16) & 0xff);
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buf[3] = (unsigned char)((ts.tv_sec >> 24) & 0xff);
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buf[4] = (unsigned char)(ts.tv_nsec & 0xff);
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buf[5] = (unsigned char)((ts.tv_nsec >> 8) & 0xff);
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buf[6] = (unsigned char)((ts.tv_nsec >> 16) & 0xff);
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buf[7] = (unsigned char)((ts.tv_nsec >> 24) & 0xff);
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# else
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gettimeofday(&tv, NULL);
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buf[0] = (unsigned char)(tv.tv_sec & 0xff);
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buf[1] = (unsigned char)((tv.tv_sec >> 8) & 0xff);
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buf[2] = (unsigned char)((tv.tv_sec >> 16) & 0xff);
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buf[3] = (unsigned char)((tv.tv_sec >> 24) & 0xff);
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buf[4] = (unsigned char)(tv.tv_usec & 0xff);
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buf[5] = (unsigned char)((tv.tv_usec >> 8) & 0xff);
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buf[6] = (unsigned char)((tv.tv_usec >> 16) & 0xff);
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buf[7] = (unsigned char)((tv.tv_usec >> 24) & 0xff);
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# endif
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buf[8] = (unsigned char)(*pctr & 0xff);
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buf[9] = (unsigned char)((*pctr >> 8) & 0xff);
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buf[10] = (unsigned char)((*pctr >> 16) & 0xff);
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buf[11] = (unsigned char)((*pctr >> 24) & 0xff);
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(*pctr)++;
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# ifndef GETPID_IS_MEANINGLESS
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pid = (unsigned long)getpid();
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buf[12] = (unsigned char)(pid & 0xff);
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buf[13] = (unsigned char)((pid >> 8) & 0xff);
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buf[14] = (unsigned char)((pid >> 16) & 0xff);
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buf[15] = (unsigned char)((pid >> 24) & 0xff);
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# endif
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}
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