-/* crypto/rand/md_rand.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
*
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
-#ifdef MD_RAND_DEBUG
-# ifndef NDEBUG
-# define NDEBUG
-# endif
-#endif
-
-#include <assert.h>
#include <stdio.h>
#include <string.h>
# include <time.h>
#endif
+#include <openssl/opensslconf.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/async.h>
#include <openssl/err.h>
+#include <internal/thread_once.h>
+
#ifdef OPENSSL_FIPS
# include <openssl/fips.h>
#endif
-#ifdef BN_DEBUG
+#if defined(BN_DEBUG) || defined(FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION)
# define PREDICT
#endif
/* #define PREDICT 1 */
#define STATE_SIZE 1023
-static int state_num = 0, state_index = 0;
+static size_t state_num = 0, state_index = 0;
static unsigned char state[STATE_SIZE + MD_DIGEST_LENGTH];
static unsigned char md[MD_DIGEST_LENGTH];
static long md_count[2] = { 0, 0 };
static double entropy = 0;
static int initialized = 0;
-static unsigned int crypto_lock_rand = 0; /* may be set only when a thread
- * holds CRYPTO_LOCK_RAND (to
- * prevent double locking) */
-/* access to lockin_thread is synchronized by CRYPTO_LOCK_RAND2 */
+static CRYPTO_RWLOCK *rand_lock = NULL;
+static CRYPTO_RWLOCK *rand_tmp_lock = NULL;
+static CRYPTO_ONCE rand_lock_init = CRYPTO_ONCE_STATIC_INIT;
+
+/* May be set only when a thread holds rand_lock (to prevent double locking) */
+static unsigned int crypto_lock_rand = 0;
+/* access to locking_threadid is synchronized by rand_tmp_lock */
/* valid iff crypto_lock_rand is set */
-static CRYPTO_THREADID locking_threadid;
+static CRYPTO_THREAD_ID locking_threadid;
#ifdef PREDICT
int rand_predictable = 0;
#endif
-static void rand_hw_seed(EVP_MD_CTX *ctx);
+static int rand_hw_seed(EVP_MD_CTX *ctx);
static void rand_cleanup(void);
static int rand_seed(const void *buf, int num);
static int rand_add(const void *buf, int num, double add_entropy);
static int rand_bytes(unsigned char *buf, int num, int pseudo);
static int rand_nopseudo_bytes(unsigned char *buf, int num);
-#ifndef OPENSSL_NO_DEPRECATED
+#if OPENSSL_API_COMPAT < 0x10100000L
static int rand_pseudo_bytes(unsigned char *buf, int num);
#endif
static int rand_status(void);
rand_nopseudo_bytes,
rand_cleanup,
rand_add,
-#ifndef OPENSSL_NO_DEPRECATED
+#if OPENSSL_API_COMPAT < 0x10100000L
rand_pseudo_bytes,
#else
NULL,
rand_status
};
+DEFINE_RUN_ONCE_STATIC(do_rand_lock_init)
+{
+ OPENSSL_init_crypto(0, NULL);
+ rand_lock = CRYPTO_THREAD_lock_new();
+ rand_tmp_lock = CRYPTO_THREAD_lock_new();
+ return rand_lock != NULL && rand_tmp_lock != NULL;
+}
+
RAND_METHOD *RAND_OpenSSL(void)
{
return (&rand_meth);
md_count[1] = 0;
entropy = 0;
initialized = 0;
+ CRYPTO_THREAD_lock_free(rand_lock);
+ CRYPTO_THREAD_lock_free(rand_tmp_lock);
}
static int rand_add(const void *buf, int num, double add)
int i, j, k, st_idx;
long md_c[2];
unsigned char local_md[MD_DIGEST_LENGTH];
- EVP_MD_CTX m;
+ EVP_MD_CTX *m;
int do_not_lock;
int rv = 0;
* hash function.
*/
- EVP_MD_CTX_init(&m);
+ m = EVP_MD_CTX_new();
+ if (m == NULL)
+ goto err;
+
+ if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
+ goto err;
+
/* check if we already have the lock */
if (crypto_lock_rand) {
- CRYPTO_THREADID cur;
- CRYPTO_THREADID_current(&cur);
- CRYPTO_r_lock(CRYPTO_LOCK_RAND2);
- do_not_lock = !CRYPTO_THREADID_cmp(&locking_threadid, &cur);
- CRYPTO_r_unlock(CRYPTO_LOCK_RAND2);
+ CRYPTO_THREAD_ID cur = CRYPTO_THREAD_get_current_id();
+ CRYPTO_THREAD_read_lock(rand_tmp_lock);
+ do_not_lock = CRYPTO_THREAD_compare_id(locking_threadid, cur);
+ CRYPTO_THREAD_unlock(rand_tmp_lock);
} else
do_not_lock = 0;
if (!do_not_lock)
- CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_write_lock(rand_lock);
st_idx = state_index;
/*
md_count[1] += (num / MD_DIGEST_LENGTH) + (num % MD_DIGEST_LENGTH > 0);
if (!do_not_lock)
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_unlock(rand_lock);
for (i = 0; i < num; i += MD_DIGEST_LENGTH) {
j = (num - i);
j = (j > MD_DIGEST_LENGTH) ? MD_DIGEST_LENGTH : j;
- if (!MD_Init(&m))
+ if (!MD_Init(m))
goto err;
- if (!MD_Update(&m, local_md, MD_DIGEST_LENGTH))
+ if (!MD_Update(m, local_md, MD_DIGEST_LENGTH))
goto err;
k = (st_idx + j) - STATE_SIZE;
if (k > 0) {
- if (!MD_Update(&m, &(state[st_idx]), j - k))
+ if (!MD_Update(m, &(state[st_idx]), j - k))
goto err;
- if (!MD_Update(&m, &(state[0]), k))
+ if (!MD_Update(m, &(state[0]), k))
goto err;
- } else if (!MD_Update(&m, &(state[st_idx]), j))
+ } else if (!MD_Update(m, &(state[st_idx]), j))
goto err;
/* DO NOT REMOVE THE FOLLOWING CALL TO MD_Update()! */
- if (!MD_Update(&m, buf, j))
+ if (!MD_Update(m, buf, j))
goto err;
/*
* We know that line may cause programs such as purify and valgrind
* insecure keys.
*/
- if (!MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)))
+ if (!MD_Update(m, (unsigned char *)&(md_c[0]), sizeof(md_c)))
goto err;
- if (!MD_Final(&m, local_md))
+ if (!MD_Final(m, local_md))
goto err;
md_c[1]++;
/*
* Parallel threads may interfere with this, but always each byte
* of the new state is the XOR of some previous value of its and
- * local_md (itermediate values may be lost). Alway using locking
+ * local_md (intermediate values may be lost). Alway using locking
* could hurt performance more than necessary given that
* conflicts occur only when the total seeding is longer than the
* random state.
}
if (!do_not_lock)
- CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_write_lock(rand_lock);
/*
* Don't just copy back local_md into md -- this could mean that other
* thread's seeding remains without effect (except for the incremented
if (entropy < ENTROPY_NEEDED) /* stop counting when we have enough */
entropy += add;
if (!do_not_lock)
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_unlock(rand_lock);
-#if !defined(OPENSSL_THREADS) && !defined(OPENSSL_SYS_WIN32)
- assert(md_c[1] == md_count[1]);
-#endif
rv = 1;
err:
- EVP_MD_CTX_cleanup(&m);
+ EVP_MD_CTX_free(m);
return rv;
}
static int rand_bytes(unsigned char *buf, int num, int pseudo)
{
static volatile int stirred_pool = 0;
- int i, j, k, st_num, st_idx;
- int num_ceil;
+ int i, j, k;
+ size_t num_ceil, st_idx, st_num;
int ok;
long md_c[2];
unsigned char local_md[MD_DIGEST_LENGTH];
- EVP_MD_CTX m;
+ EVP_MD_CTX *m;
#ifndef GETPID_IS_MEANINGLESS
pid_t curr_pid = getpid();
#endif
#ifdef PREDICT
if (rand_predictable) {
- static unsigned char val = 0;
+ unsigned char val = 1;
for (i = 0; i < num; i++)
buf[i] = val++;
if (num <= 0)
return 1;
- EVP_MD_CTX_init(&m);
+ m = EVP_MD_CTX_new();
+ if (m == NULL)
+ goto err_mem;
+
/* round upwards to multiple of MD_DIGEST_LENGTH/2 */
num_ceil =
(1 + (num - 1) / (MD_DIGEST_LENGTH / 2)) * (MD_DIGEST_LENGTH / 2);
* global 'md'.
*/
- CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+ if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
+ goto err_mem;
+
+ CRYPTO_THREAD_write_lock(rand_lock);
/*
* We could end up in an async engine while holding this lock so ensure
* we don't pause and cause a deadlock
ASYNC_block_pause();
/* prevent rand_bytes() from trying to obtain the lock again */
- CRYPTO_w_lock(CRYPTO_LOCK_RAND2);
- CRYPTO_THREADID_current(&locking_threadid);
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND2);
+ CRYPTO_THREAD_write_lock(rand_tmp_lock);
+ locking_threadid = CRYPTO_THREAD_get_current_id();
+ CRYPTO_THREAD_unlock(rand_tmp_lock);
crypto_lock_rand = 1;
if (!initialized) {
/* before unlocking, we must clear 'crypto_lock_rand' */
crypto_lock_rand = 0;
ASYNC_unblock_pause();
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_unlock(rand_lock);
while (num > 0) {
/* num_ceil -= MD_DIGEST_LENGTH/2 */
j = (num >= MD_DIGEST_LENGTH / 2) ? MD_DIGEST_LENGTH / 2 : num;
num -= j;
- if (!MD_Init(&m))
+ if (!MD_Init(m))
goto err;
#ifndef GETPID_IS_MEANINGLESS
if (curr_pid) { /* just in the first iteration to save time */
- if (!MD_Update(&m, (unsigned char *)&curr_pid, sizeof curr_pid))
+ if (!MD_Update(m, (unsigned char *)&curr_pid, sizeof curr_pid))
goto err;
curr_pid = 0;
}
#endif
if (curr_time) { /* just in the first iteration to save time */
- if (!MD_Update(&m, (unsigned char *)&curr_time, sizeof curr_time))
+ if (!MD_Update(m, (unsigned char *)&curr_time, sizeof curr_time))
goto err;
- if (!MD_Update(&m, (unsigned char *)&tv, sizeof tv))
+ if (!MD_Update(m, (unsigned char *)&tv, sizeof tv))
goto err;
curr_time = 0;
- rand_hw_seed(&m);
+ if (!rand_hw_seed(m))
+ goto err;
}
- if (!MD_Update(&m, local_md, MD_DIGEST_LENGTH))
- goto err;
- if (!MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c)))
+ if (!MD_Update(m, local_md, MD_DIGEST_LENGTH))
goto err;
-
-#ifndef PURIFY /* purify complains */
- /*
- * The following line uses the supplied buffer as a small source of
- * entropy: since this buffer is often uninitialised it may cause
- * programs such as purify or valgrind to complain. So for those
- * builds it is not used: the removal of such a small source of
- * entropy has negligible impact on security.
- */
- if (!MD_Update(&m, buf, j))
+ if (!MD_Update(m, (unsigned char *)&(md_c[0]), sizeof(md_c)))
goto err;
-#endif
k = (st_idx + MD_DIGEST_LENGTH / 2) - st_num;
if (k > 0) {
- if (!MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2 - k))
+ if (!MD_Update(m, &(state[st_idx]), MD_DIGEST_LENGTH / 2 - k))
goto err;
- if (!MD_Update(&m, &(state[0]), k))
+ if (!MD_Update(m, &(state[0]), k))
goto err;
- } else if (!MD_Update(&m, &(state[st_idx]), MD_DIGEST_LENGTH / 2))
+ } else if (!MD_Update(m, &(state[st_idx]), MD_DIGEST_LENGTH / 2))
goto err;
- if (!MD_Final(&m, local_md))
+ if (!MD_Final(m, local_md))
goto err;
for (i = 0; i < MD_DIGEST_LENGTH / 2; i++) {
}
}
- if (!MD_Init(&m)
- || !MD_Update(&m, (unsigned char *)&(md_c[0]), sizeof(md_c))
- || !MD_Update(&m, local_md, MD_DIGEST_LENGTH))
+ if (!MD_Init(m)
+ || !MD_Update(m, (unsigned char *)&(md_c[0]), sizeof(md_c))
+ || !MD_Update(m, local_md, MD_DIGEST_LENGTH))
goto err;
- CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_write_lock(rand_lock);
/*
* Prevent deadlocks if we end up in an async engine
*/
ASYNC_block_pause();
- if (!MD_Update(&m, md, MD_DIGEST_LENGTH) || !MD_Final(&m, md)) {
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ if (!MD_Update(m, md, MD_DIGEST_LENGTH) || !MD_Final(m, md)) {
+ CRYPTO_THREAD_unlock(rand_lock);
goto err;
}
ASYNC_unblock_pause();
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_unlock(rand_lock);
- EVP_MD_CTX_cleanup(&m);
+ EVP_MD_CTX_free(m);
if (ok)
return (1);
else if (pseudo)
else {
RANDerr(RAND_F_RAND_BYTES, RAND_R_PRNG_NOT_SEEDED);
ERR_add_error_data(1, "You need to read the OpenSSL FAQ, "
- "http://www.openssl.org/support/faq.html");
+ "https://www.openssl.org/docs/faq.html");
return (0);
}
err:
- EVP_MD_CTX_cleanup(&m);
RANDerr(RAND_F_RAND_BYTES, ERR_R_EVP_LIB);
+ EVP_MD_CTX_free(m);
+ return 0;
+ err_mem:
+ RANDerr(RAND_F_RAND_BYTES, ERR_R_MALLOC_FAILURE);
+ EVP_MD_CTX_free(m);
return 0;
}
return rand_bytes(buf, num, 0);
}
-#ifndef OPENSSL_NO_DEPRECATED
+#if OPENSSL_API_COMPAT < 0x10100000L
/*
* pseudo-random bytes that are guaranteed to be unique but not unpredictable
*/
static int rand_status(void)
{
- CRYPTO_THREADID cur;
+ CRYPTO_THREAD_ID cur;
int ret;
int do_not_lock;
- CRYPTO_THREADID_current(&cur);
+ if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
+ return 0;
+
+ cur = CRYPTO_THREAD_get_current_id();
/*
* check if we already have the lock (could happen if a RAND_poll()
* implementation calls RAND_status())
*/
if (crypto_lock_rand) {
- CRYPTO_r_lock(CRYPTO_LOCK_RAND2);
- do_not_lock = !CRYPTO_THREADID_cmp(&locking_threadid, &cur);
- CRYPTO_r_unlock(CRYPTO_LOCK_RAND2);
+ CRYPTO_THREAD_read_lock(rand_tmp_lock);
+ do_not_lock = CRYPTO_THREAD_compare_id(locking_threadid, cur);
+ CRYPTO_THREAD_unlock(rand_tmp_lock);
} else
do_not_lock = 0;
if (!do_not_lock) {
- CRYPTO_w_lock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_write_lock(rand_lock);
/*
* Prevent deadlocks in case we end up in an async engine
*/
/*
* prevent rand_bytes() from trying to obtain the lock again
*/
- CRYPTO_w_lock(CRYPTO_LOCK_RAND2);
- CRYPTO_THREADID_cpy(&locking_threadid, &cur);
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND2);
+ CRYPTO_THREAD_write_lock(rand_tmp_lock);
+ locking_threadid = cur;
+ CRYPTO_THREAD_unlock(rand_tmp_lock);
crypto_lock_rand = 1;
}
crypto_lock_rand = 0;
ASYNC_unblock_pause();
- CRYPTO_w_unlock(CRYPTO_LOCK_RAND);
+ CRYPTO_THREAD_unlock(rand_lock);
}
return ret;
#if (defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
defined(__x86_64) || defined(__x86_64__) || \
- defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ)
+ defined(_M_AMD64) || defined (_M_X64)) && defined(OPENSSL_CPUID_OBJ) \
+ && !defined(OPENSSL_NO_RDRAND)
# define RDRAND_CALLS 4
size_t OPENSSL_ia32_rdrand(void);
extern unsigned int OPENSSL_ia32cap_P[];
-static void rand_hw_seed(EVP_MD_CTX *ctx)
+static int rand_hw_seed(EVP_MD_CTX *ctx)
{
int i;
if (!(OPENSSL_ia32cap_P[1] & (1 << (62 - 32))))
- return;
+ return 1;
for (i = 0; i < RDRAND_CALLS; i++) {
size_t rnd;
rnd = OPENSSL_ia32_rdrand();
if (rnd == 0)
- return;
- MD_Update(ctx, (unsigned char *)&rnd, sizeof(size_t));
+ return 1;
+ if (!MD_Update(ctx, (unsigned char *)&rnd, sizeof(size_t)))
+ return 0;
}
+ return 1;
}
/* XOR an existing buffer with random data */
#else
-static void rand_hw_seed(EVP_MD_CTX *ctx)
+static int rand_hw_seed(EVP_MD_CTX *ctx)
{
- return;
+ return 1;
}
void rand_hw_xor(unsigned char *buf, size_t num)
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