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Openssl 1.1.0h

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Hakase
2018-04-02 22:33:38 +09:00
commit 1fd4faa81c
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crypto/rand/build.info
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LIBS=../../libcrypto
SOURCE[../../libcrypto]=\
md_rand.c randfile.c rand_lib.c rand_err.c rand_egd.c \
rand_win.c rand_unix.c rand_vms.c
crypto/rand/md_rand.c
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/*
* 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
*/
#include <stdio.h>
#include <string.h>
#include "e_os.h"
#if !(defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_DSPBIOS))
# include <sys/time.h>
#endif
#if defined(OPENSSL_SYS_VXWORKS)
# include <time.h>
#endif
#include <openssl/opensslconf.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/async.h>
#include "rand_lcl.h"
#include <openssl/err.h>
#include <internal/thread_once.h>
#ifdef OPENSSL_FIPS
# include <openssl/fips.h>
#endif
#ifdef BN_DEBUG
# define PREDICT
#endif
/* #define PREDICT 1 */
#define STATE_SIZE 1023
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 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_THREAD_ID locking_threadid;
#ifdef PREDICT
int rand_predictable = 0;
#endif
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);
#if OPENSSL_API_COMPAT < 0x10100000L
static int rand_pseudo_bytes(unsigned char *buf, int num);
#endif
static int rand_status(void);
static RAND_METHOD rand_meth = {
rand_seed,
rand_nopseudo_bytes,
rand_cleanup,
rand_add,
#if OPENSSL_API_COMPAT < 0x10100000L
rand_pseudo_bytes,
#else
NULL,
#endif
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);
}
static void rand_cleanup(void)
{
OPENSSL_cleanse(state, sizeof(state));
state_num = 0;
state_index = 0;
OPENSSL_cleanse(md, MD_DIGEST_LENGTH);
md_count[0] = 0;
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;
int do_not_lock;
int rv = 0;
if (!num)
return 1;
/*
* (Based on the rand(3) manpage)
*
* The input is chopped up into units of 20 bytes (or less for
* the last block). Each of these blocks is run through the hash
* function as follows: The data passed to the hash function
* is the current 'md', the same number of bytes from the 'state'
* (the location determined by in incremented looping index) as
* the current 'block', the new key data 'block', and 'count'
* (which is incremented after each use).
* The result of this is kept in 'md' and also xored into the
* 'state' at the same locations that were used as input into the
* hash function.
*/
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_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_THREAD_write_lock(rand_lock);
st_idx = state_index;
/*
* use our own copies of the counters so that even if a concurrent thread
* seeds with exactly the same data and uses the same subarray there's
* _some_ difference
*/
md_c[0] = md_count[0];
md_c[1] = md_count[1];
memcpy(local_md, md, sizeof(md));
/* state_index <= state_num <= STATE_SIZE */
state_index += num;
if (state_index >= STATE_SIZE) {
state_index %= STATE_SIZE;
state_num = STATE_SIZE;
} else if (state_num < STATE_SIZE) {
if (state_index > state_num)
state_num = state_index;
}
/* state_index <= state_num <= STATE_SIZE */
/*
* state[st_idx], ..., state[(st_idx + num - 1) % STATE_SIZE] are what we
* will use now, but other threads may use them as well
*/
md_count[1] += (num / MD_DIGEST_LENGTH) + (num % MD_DIGEST_LENGTH > 0);
if (!do_not_lock)
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))
goto err;
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))
goto err;
if (!MD_Update(m, &(state[0]), k))
goto err;
} 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))
goto err;
/*
* We know that line may cause programs such as purify and valgrind
* to complain about use of uninitialized data. The problem is not,
* it's with the caller. Removing that line will make sure you get
* really bad randomness and thereby other problems such as very
* insecure keys.
*/
if (!MD_Update(m, (unsigned char *)&(md_c[0]), sizeof(md_c)))
goto err;
if (!MD_Final(m, local_md))
goto err;
md_c[1]++;
buf = (const char *)buf + j;
for (k = 0; k < j; k++) {
/*
* 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 (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.
*/
state[st_idx++] ^= local_md[k];
if (st_idx >= STATE_SIZE)
st_idx = 0;
}
}
if (!do_not_lock)
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
* counter). By XORing it we keep at least as much entropy as fits into
* md.
*/
for (k = 0; k < (int)sizeof(md); k++) {
md[k] ^= local_md[k];
}
if (entropy < ENTROPY_NEEDED) /* stop counting when we have enough */
entropy += add;
if (!do_not_lock)
CRYPTO_THREAD_unlock(rand_lock);
rv = 1;
err:
EVP_MD_CTX_free(m);
return rv;
}
static int rand_seed(const void *buf, int num)
{
return rand_add(buf, num, (double)num);
}
static int rand_bytes(unsigned char *buf, int num, int pseudo)
{
static volatile int stirred_pool = 0;
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;
#ifndef GETPID_IS_MEANINGLESS
pid_t curr_pid = getpid();
#endif
time_t curr_time = time(NULL);
int do_stir_pool = 0;
/* time value for various platforms */
#ifdef OPENSSL_SYS_WIN32
FILETIME tv;
# ifdef _WIN32_WCE
SYSTEMTIME t;
GetSystemTime(&t);
SystemTimeToFileTime(&t, &tv);
# else
GetSystemTimeAsFileTime(&tv);
# endif
#elif defined(OPENSSL_SYS_VXWORKS)
struct timespec tv;
clock_gettime(CLOCK_REALTIME, &ts);
#elif defined(OPENSSL_SYS_DSPBIOS)
unsigned long long tv, OPENSSL_rdtsc();
tv = OPENSSL_rdtsc();
#else
struct timeval tv;
gettimeofday(&tv, NULL);
#endif
#ifdef PREDICT
if (rand_predictable) {
static unsigned char val = 0;
for (i = 0; i < num; i++)
buf[i] = val++;
return (1);
}
#endif
if (num <= 0)
return 1;
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);
/*
* (Based on the rand(3) manpage:)
*
* For each group of 10 bytes (or less), we do the following:
*
* Input into the hash function the local 'md' (which is initialized from
* the global 'md' before any bytes are generated), the bytes that are to
* be overwritten by the random bytes, and bytes from the 'state'
* (incrementing looping index). From this digest output (which is kept
* in 'md'), the top (up to) 10 bytes are returned to the caller and the
* bottom 10 bytes are xored into the 'state'.
*
* Finally, after we have finished 'num' random bytes for the
* caller, 'count' (which is incremented) and the local and global 'md'
* are fed into the hash function and the results are kept in the
* global 'md'.
*/
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_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) {
RAND_poll();
initialized = 1;
}
if (!stirred_pool)
do_stir_pool = 1;
ok = (entropy >= ENTROPY_NEEDED);
if (!ok) {
/*
* If the PRNG state is not yet unpredictable, then seeing the PRNG
* output may help attackers to determine the new state; thus we have
* to decrease the entropy estimate. Once we've had enough initial
* seeding we don't bother to adjust the entropy count, though,
* because we're not ambitious to provide *information-theoretic*
* randomness. NOTE: This approach fails if the program forks before
* we have enough entropy. Entropy should be collected in a separate
* input pool and be transferred to the output pool only when the
* entropy limit has been reached.
*/
entropy -= num;
if (entropy < 0)
entropy = 0;
}
if (do_stir_pool) {
/*
* In the output function only half of 'md' remains secret, so we
* better make sure that the required entropy gets 'evenly
* distributed' through 'state', our randomness pool. The input
* function (rand_add) chains all of 'md', which makes it more
* suitable for this purpose.
*/
int n = STATE_SIZE; /* so that the complete pool gets accessed */
while (n > 0) {
#if MD_DIGEST_LENGTH > 20
# error "Please adjust DUMMY_SEED."
#endif
#define DUMMY_SEED "...................." /* at least MD_DIGEST_LENGTH */
/*
* Note that the seed does not matter, it's just that
* rand_add expects to have something to hash.
*/
rand_add(DUMMY_SEED, MD_DIGEST_LENGTH, 0.0);
n -= MD_DIGEST_LENGTH;
}
if (ok)
stirred_pool = 1;
}
st_idx = state_index;
st_num = state_num;
md_c[0] = md_count[0];
md_c[1] = md_count[1];
memcpy(local_md, md, sizeof(md));
state_index += num_ceil;
if (state_index > state_num)
state_index %= state_num;
/*
* state[st_idx], ..., state[(st_idx + num_ceil - 1) % st_num] are now
* ours (but other threads may use them too)
*/
md_count[0] += 1;
/* before unlocking, we must clear 'crypto_lock_rand' */
crypto_lock_rand = 0;
ASYNC_unblock_pause();
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))
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)))
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)))
goto err;
if (!MD_Update(m, (unsigned char *)&tv, sizeof(tv)))
goto err;
curr_time = 0;
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)))
goto err;
k = (st_idx + MD_DIGEST_LENGTH / 2) - st_num;
if (k > 0) {
if (!MD_Update(m, &(state[st_idx]), MD_DIGEST_LENGTH / 2 - k))
goto err;
if (!MD_Update(m, &(state[0]), k))
goto err;
} else if (!MD_Update(m, &(state[st_idx]), MD_DIGEST_LENGTH / 2))
goto err;
if (!MD_Final(m, local_md))
goto err;
for (i = 0; i < MD_DIGEST_LENGTH / 2; i++) {
/* may compete with other threads */
state[st_idx++] ^= local_md[i];
if (st_idx >= st_num)
st_idx = 0;
if (i < j)
*(buf++) = local_md[i + MD_DIGEST_LENGTH / 2];
}
}
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_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)) {
ASYNC_unblock_pause();
CRYPTO_THREAD_unlock(rand_lock);
goto err;
}
ASYNC_unblock_pause();
CRYPTO_THREAD_unlock(rand_lock);
EVP_MD_CTX_free(m);
if (ok)
return (1);
else if (pseudo)
return 0;
else {
RANDerr(RAND_F_RAND_BYTES, RAND_R_PRNG_NOT_SEEDED);
ERR_add_error_data(1, "You need to read the OpenSSL FAQ, "
"https://www.openssl.org/docs/faq.html");
return (0);
}
err:
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;
}
static int rand_nopseudo_bytes(unsigned char *buf, int num)
{
return rand_bytes(buf, num, 0);
}
#if OPENSSL_API_COMPAT < 0x10100000L
/*
* pseudo-random bytes that are guaranteed to be unique but not unpredictable
*/
static int rand_pseudo_bytes(unsigned char *buf, int num)
{
return rand_bytes(buf, num, 1);
}
#endif
static int rand_status(void)
{
CRYPTO_THREAD_ID cur;
int ret;
int do_not_lock;
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_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_THREAD_write_lock(rand_lock);
/*
* Prevent deadlocks in case we end up in an async engine
*/
ASYNC_block_pause();
/*
* prevent rand_bytes() from trying to obtain the lock again
*/
CRYPTO_THREAD_write_lock(rand_tmp_lock);
locking_threadid = cur;
CRYPTO_THREAD_unlock(rand_tmp_lock);
crypto_lock_rand = 1;
}
if (!initialized) {
RAND_poll();
initialized = 1;
}
ret = entropy >= ENTROPY_NEEDED;
if (!do_not_lock) {
/* before unlocking, we must clear 'crypto_lock_rand' */
crypto_lock_rand = 0;
ASYNC_unblock_pause();
CRYPTO_THREAD_unlock(rand_lock);
}
return ret;
}
/*
* rand_hw_seed: get seed data from any available hardware RNG. only
* currently supports rdrand.
*/
/* Adapted from eng_rdrand.c */
#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(OPENSSL_NO_RDRAND)
# define RDRAND_CALLS 4
size_t OPENSSL_ia32_rdrand(void);
extern unsigned int OPENSSL_ia32cap_P[];
static int rand_hw_seed(EVP_MD_CTX *ctx)
{
int i;
if (!(OPENSSL_ia32cap_P[1] & (1 << (62 - 32))))
return 1;
for (i = 0; i < RDRAND_CALLS; i++) {
size_t rnd;
rnd = OPENSSL_ia32_rdrand();
if (rnd == 0)
return 1;
if (!MD_Update(ctx, (unsigned char *)&rnd, sizeof(size_t)))
return 0;
}
return 1;
}
/* XOR an existing buffer with random data */
void rand_hw_xor(unsigned char *buf, size_t num)
{
size_t rnd;
if (!(OPENSSL_ia32cap_P[1] & (1 << (62 - 32))))
return;
while (num >= sizeof(size_t)) {
rnd = OPENSSL_ia32_rdrand();
if (rnd == 0)
return;
*((size_t *)buf) ^= rnd;
buf += sizeof(size_t);
num -= sizeof(size_t);
}
if (num) {
rnd = OPENSSL_ia32_rdrand();
if (rnd == 0)
return;
while (num) {
*buf ^= rnd & 0xff;
rnd >>= 8;
buf++;
num--;
}
}
}
#else
static int rand_hw_seed(EVP_MD_CTX *ctx)
{
return 1;
}
void rand_hw_xor(unsigned char *buf, size_t num)
{
return;
}
#endif
crypto/rand/rand_egd.c
+249
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/*
* Copyright 2000-2016 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
*/
#include <openssl/opensslconf.h>
#ifdef OPENSSL_NO_EGD
NON_EMPTY_TRANSLATION_UNIT
#else
# include <openssl/crypto.h>
# include <openssl/e_os2.h>
# include <openssl/rand.h>
/*-
* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
*
* This module supplies three routines:
*
* RAND_query_egd_bytes(path, buf, bytes)
* will actually query "bytes" bytes of entropy form the egd-socket located
* at path and will write them to buf (if supplied) or will directly feed
* it to RAND_seed() if buf==NULL.
* The number of bytes is not limited by the maximum chunk size of EGD,
* which is 255 bytes. If more than 255 bytes are wanted, several chunks
* of entropy bytes are requested. The connection is left open until the
* query is competed.
* RAND_query_egd_bytes() returns with
* -1 if an error occurred during connection or communication.
* num the number of bytes read from the EGD socket. This number is either
* the number of bytes requested or smaller, if the EGD pool is
* drained and the daemon signals that the pool is empty.
* This routine does not touch any RAND_status(). This is necessary, since
* PRNG functions may call it during initialization.
*
* RAND_egd_bytes(path, bytes) will query "bytes" bytes and have them
* used to seed the PRNG.
* RAND_egd_bytes() is a wrapper for RAND_query_egd_bytes() with buf=NULL.
* Unlike RAND_query_egd_bytes(), RAND_status() is used to test the
* seed status so that the return value can reflect the seed state:
* -1 if an error occurred during connection or communication _or_
* if the PRNG has still not received the required seeding.
* num the number of bytes read from the EGD socket. This number is either
* the number of bytes requested or smaller, if the EGD pool is
* drained and the daemon signals that the pool is empty.
*
* RAND_egd(path) will query 255 bytes and use the bytes retrieved to seed
* the PRNG.
* RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
*/
# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_UEFI)
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
{
return (-1);
}
int RAND_egd(const char *path)
{
return (-1);
}
int RAND_egd_bytes(const char *path, int bytes)
{
return (-1);
}
# else
# include <openssl/opensslconf.h>
# include OPENSSL_UNISTD
# include <stddef.h>
# include <sys/types.h>
# include <sys/socket.h>
# ifndef NO_SYS_UN_H
# ifdef OPENSSL_SYS_VXWORKS
# include <streams/un.h>
# else
# include <sys/un.h>
# endif
# else
struct sockaddr_un {
short sun_family; /* AF_UNIX */
char sun_path[108]; /* path name (gag) */
};
# endif /* NO_SYS_UN_H */
# include <string.h>
# include <errno.h>
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
{
int ret = 0;
struct sockaddr_un addr;
int len, num, numbytes;
int fd = -1;
int success;
unsigned char egdbuf[2], tempbuf[255], *retrievebuf;
memset(&addr, 0, sizeof(addr));
addr.sun_family = AF_UNIX;
if (strlen(path) >= sizeof(addr.sun_path))
return (-1);
OPENSSL_strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd == -1)
return (-1);
success = 0;
while (!success) {
if (connect(fd, (struct sockaddr *)&addr, len) == 0)
success = 1;
else {
switch (errno) {
# ifdef EINTR
case EINTR:
# endif
# ifdef EAGAIN
case EAGAIN:
# endif
# ifdef EINPROGRESS
case EINPROGRESS:
# endif
# ifdef EALREADY
case EALREADY:
# endif
/* No error, try again */
break;
# ifdef EISCONN
case EISCONN:
success = 1;
break;
# endif
default:
ret = -1;
goto err; /* failure */
}
}
}
while (bytes > 0) {
egdbuf[0] = 1;
egdbuf[1] = bytes < 255 ? bytes : 255;
numbytes = 0;
while (numbytes != 2) {
num = write(fd, egdbuf + numbytes, 2 - numbytes);
if (num >= 0)
numbytes += num;
else {
switch (errno) {
# ifdef EINTR
case EINTR:
# endif
# ifdef EAGAIN
case EAGAIN:
# endif
/* No error, try again */
break;
default:
ret = -1;
goto err; /* failure */
}
}
}
numbytes = 0;
while (numbytes != 1) {
num = read(fd, egdbuf, 1);
if (num == 0)
goto err; /* descriptor closed */
else if (num > 0)
numbytes += num;
else {
switch (errno) {
# ifdef EINTR
case EINTR:
# endif
# ifdef EAGAIN
case EAGAIN:
# endif
/* No error, try again */
break;
default:
ret = -1;
goto err; /* failure */
}
}
}
if (egdbuf[0] == 0)
goto err;
if (buf)
retrievebuf = buf + ret;
else
retrievebuf = tempbuf;
numbytes = 0;
while (numbytes != egdbuf[0]) {
num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
if (num == 0)
goto err; /* descriptor closed */
else if (num > 0)
numbytes += num;
else {
switch (errno) {
# ifdef EINTR
case EINTR:
# endif
# ifdef EAGAIN
case EAGAIN:
# endif
/* No error, try again */
break;
default:
ret = -1;
goto err; /* failure */
}
}
}
ret += egdbuf[0];
bytes -= egdbuf[0];
if (!buf)
RAND_seed(tempbuf, egdbuf[0]);
}
err:
if (fd != -1)
close(fd);
return (ret);
}
int RAND_egd_bytes(const char *path, int bytes)
{
int num, ret = -1;
num = RAND_query_egd_bytes(path, NULL, bytes);
if (num < 0)
goto err;
if (RAND_status() == 1)
ret = num;
err:
return (ret);
}
int RAND_egd(const char *path)
{
return (RAND_egd_bytes(path, 255));
}
# endif
#endif
crypto/rand/rand_err.c
+43
View File
@@ -0,0 +1,43 @@
/*
* Generated by util/mkerr.pl DO NOT EDIT
* 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
*/
#include <stdio.h>
#include <openssl/err.h>
#include <openssl/rand.h>
/* BEGIN ERROR CODES */
#ifndef OPENSSL_NO_ERR
# define ERR_FUNC(func) ERR_PACK(ERR_LIB_RAND,func,0)
# define ERR_REASON(reason) ERR_PACK(ERR_LIB_RAND,0,reason)
static ERR_STRING_DATA RAND_str_functs[] = {
{ERR_FUNC(RAND_F_RAND_BYTES), "RAND_bytes"},
{0, NULL}
};
static ERR_STRING_DATA RAND_str_reasons[] = {
{ERR_REASON(RAND_R_PRNG_NOT_SEEDED), "PRNG not seeded"},
{0, NULL}
};
#endif
int ERR_load_RAND_strings(void)
{
#ifndef OPENSSL_NO_ERR
if (ERR_func_error_string(RAND_str_functs[0].error) == NULL) {
ERR_load_strings(0, RAND_str_functs);
ERR_load_strings(0, RAND_str_reasons);
}
#endif
return 1;
}
crypto/rand/rand_lcl.h
+46
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@@ -0,0 +1,46 @@
/*
* 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
*/
#ifndef HEADER_RAND_LCL_H
# define HEADER_RAND_LCL_H
# define ENTROPY_NEEDED 32 /* require 256 bits = 32 bytes of randomness */
# if !defined(USE_MD5_RAND) && !defined(USE_SHA1_RAND) && !defined(USE_MDC2_RAND) && !defined(USE_MD2_RAND)
# define USE_SHA1_RAND
# endif
# include <openssl/evp.h>
# define MD_Update(a,b,c) EVP_DigestUpdate(a,b,c)
# define MD_Final(a,b) EVP_DigestFinal_ex(a,b,NULL)
# if defined(USE_MD5_RAND)
# include <openssl/md5.h>
# define MD_DIGEST_LENGTH MD5_DIGEST_LENGTH
# define MD_Init(a) EVP_DigestInit_ex(a,EVP_md5(), NULL)
# define MD(a,b,c) EVP_Digest(a,b,c,NULL,EVP_md5(), NULL)
# elif defined(USE_SHA1_RAND)
# include <openssl/sha.h>
# define MD_DIGEST_LENGTH SHA_DIGEST_LENGTH
# define MD_Init(a) EVP_DigestInit_ex(a,EVP_sha1(), NULL)
# define MD(a,b,c) EVP_Digest(a,b,c,NULL,EVP_sha1(), NULL)
# elif defined(USE_MDC2_RAND)
# include <openssl/mdc2.h>
# define MD_DIGEST_LENGTH MDC2_DIGEST_LENGTH
# define MD_Init(a) EVP_DigestInit_ex(a,EVP_mdc2(), NULL)
# define MD(a,b,c) EVP_Digest(a,b,c,NULL,EVP_mdc2(), NULL)
# elif defined(USE_MD2_RAND)
# include <openssl/md2.h>
# define MD_DIGEST_LENGTH MD2_DIGEST_LENGTH
# define MD_Init(a) EVP_DigestInit_ex(a,EVP_md2(), NULL)
# define MD(a,b,c) EVP_Digest(a,b,c,NULL,EVP_md2(), NULL)
# endif
void rand_hw_xor(unsigned char *buf, size_t num);
#endif
crypto/rand/rand_lib.c
+164
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@@ -0,0 +1,164 @@
/*
* 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
*/
#include <stdio.h>
#include <time.h>
#include "internal/cryptlib.h"
#include <openssl/opensslconf.h>
#include "internal/rand.h"
#include <openssl/engine.h>
#include "internal/thread_once.h"
#ifdef OPENSSL_FIPS
# include <openssl/fips.h>
# include <openssl/fips_rand.h>
#endif
#ifndef OPENSSL_NO_ENGINE
/* non-NULL if default_RAND_meth is ENGINE-provided */
static ENGINE *funct_ref = NULL;
static CRYPTO_RWLOCK *rand_engine_lock = NULL;
#endif
static const RAND_METHOD *default_RAND_meth = NULL;
static CRYPTO_RWLOCK *rand_meth_lock = NULL;
static CRYPTO_ONCE rand_lock_init = CRYPTO_ONCE_STATIC_INIT;
DEFINE_RUN_ONCE_STATIC(do_rand_lock_init)
{
int ret = 1;
#ifndef OPENSSL_NO_ENGINE
rand_engine_lock = CRYPTO_THREAD_lock_new();
ret &= rand_engine_lock != NULL;
#endif
rand_meth_lock = CRYPTO_THREAD_lock_new();
ret &= rand_meth_lock != NULL;
return ret;
}
int RAND_set_rand_method(const RAND_METHOD *meth)
{
if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
return 0;
CRYPTO_THREAD_write_lock(rand_meth_lock);
#ifndef OPENSSL_NO_ENGINE
ENGINE_finish(funct_ref);
funct_ref = NULL;
#endif
default_RAND_meth = meth;
CRYPTO_THREAD_unlock(rand_meth_lock);
return 1;
}
const RAND_METHOD *RAND_get_rand_method(void)
{
const RAND_METHOD *tmp_meth = NULL;
if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
return NULL;
CRYPTO_THREAD_write_lock(rand_meth_lock);
if (!default_RAND_meth) {
#ifndef OPENSSL_NO_ENGINE
ENGINE *e = ENGINE_get_default_RAND();
if (e) {
default_RAND_meth = ENGINE_get_RAND(e);
if (default_RAND_meth == NULL) {
ENGINE_finish(e);
e = NULL;
}
}
if (e)
funct_ref = e;
else
#endif
default_RAND_meth = RAND_OpenSSL();
}
tmp_meth = default_RAND_meth;
CRYPTO_THREAD_unlock(rand_meth_lock);
return tmp_meth;
}
#ifndef OPENSSL_NO_ENGINE
int RAND_set_rand_engine(ENGINE *engine)
{
const RAND_METHOD *tmp_meth = NULL;
if (!RUN_ONCE(&rand_lock_init, do_rand_lock_init))
return 0;
if (engine) {
if (!ENGINE_init(engine))
return 0;
tmp_meth = ENGINE_get_RAND(engine);
if (tmp_meth == NULL) {
ENGINE_finish(engine);
return 0;
}
}
CRYPTO_THREAD_write_lock(rand_engine_lock);
/* This function releases any prior ENGINE so call it first */
RAND_set_rand_method(tmp_meth);
funct_ref = engine;
CRYPTO_THREAD_unlock(rand_engine_lock);
return 1;
}
#endif
void rand_cleanup_int(void)
{
const RAND_METHOD *meth = default_RAND_meth;
if (meth && meth->cleanup)
meth->cleanup();
RAND_set_rand_method(NULL);
CRYPTO_THREAD_lock_free(rand_meth_lock);
#ifndef OPENSSL_NO_ENGINE
CRYPTO_THREAD_lock_free(rand_engine_lock);
#endif
}
void RAND_seed(const void *buf, int num)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->seed)
meth->seed(buf, num);
}
void RAND_add(const void *buf, int num, double entropy)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->add)
meth->add(buf, num, entropy);
}
int RAND_bytes(unsigned char *buf, int num)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->bytes)
return meth->bytes(buf, num);
return (-1);
}
#if OPENSSL_API_COMPAT < 0x10100000L
int RAND_pseudo_bytes(unsigned char *buf, int num)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->pseudorand)
return meth->pseudorand(buf, num);
return (-1);
}
#endif
int RAND_status(void)
{
const RAND_METHOD *meth = RAND_get_rand_method();
if (meth && meth->status)
return meth->status();
return 0;
}
crypto/rand/rand_unix.c
+324
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@@ -0,0 +1,324 @@
/*
* 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
*/
#include <stdio.h>
#define USE_SOCKETS
#include "e_os.h"
#include "internal/cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"
#if !(defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI))
# include <sys/types.h>
# include <sys/time.h>
# include <sys/times.h>
# include <sys/stat.h>
# include <fcntl.h>
# include <unistd.h>
# include <time.h>
# if defined(OPENSSL_SYS_LINUX) /* should actually be available virtually
* everywhere */
# include <poll.h>
# endif
# include <limits.h>
# ifndef FD_SETSIZE
# define FD_SETSIZE (8*sizeof(fd_set))
# endif
# if defined(OPENSSL_SYS_VOS)
/*
* The following algorithm repeatedly samples the real-time clock (RTC) to
* generate a sequence of unpredictable data. The algorithm relies upon the
* uneven execution speed of the code (due to factors such as cache misses,
* interrupts, bus activity, and scheduling) and upon the rather large
* relative difference between the speed of the clock and the rate at which
* it can be read.
*
* If this code is ported to an environment where execution speed is more
* constant or where the RTC ticks at a much slower rate, or the clock can be
* read with fewer instructions, it is likely that the results would be far
* more predictable.
*
* As a precaution, we generate 4 times the minimum required amount of seed
* data.
*/
int RAND_poll(void)
{
short int code;
gid_t curr_gid;
pid_t curr_pid;
uid_t curr_uid;
int i, k;
struct timespec ts;
unsigned char v;
# ifdef OPENSSL_SYS_VOS_HPPA
long duration;
extern void s$sleep(long *_duration, short int *_code);
# else
# ifdef OPENSSL_SYS_VOS_IA32
long long duration;
extern void s$sleep2(long long *_duration, short int *_code);
# else
# error "Unsupported Platform."
# endif /* OPENSSL_SYS_VOS_IA32 */
# endif /* OPENSSL_SYS_VOS_HPPA */
/*
* Seed with the gid, pid, and uid, to ensure *some* variation between
* different processes.
*/
curr_gid = getgid();
RAND_add(&curr_gid, sizeof(curr_gid), 1);
curr_gid = 0;
curr_pid = getpid();
RAND_add(&curr_pid, sizeof(curr_pid), 1);
curr_pid = 0;
curr_uid = getuid();
RAND_add(&curr_uid, sizeof(curr_uid), 1);
curr_uid = 0;
for (i = 0; i < (ENTROPY_NEEDED * 4); i++) {
/*
* burn some cpu; hope for interrupts, cache collisions, bus
* interference, etc.
*/
for (k = 0; k < 99; k++)
ts.tv_nsec = random();
# ifdef OPENSSL_SYS_VOS_HPPA
/* sleep for 1/1024 of a second (976 us). */
duration = 1;
s$sleep(&duration, &code);
# else
# ifdef OPENSSL_SYS_VOS_IA32
/* sleep for 1/65536 of a second (15 us). */
duration = 1;
s$sleep2(&duration, &code);
# endif /* OPENSSL_SYS_VOS_IA32 */
# endif /* OPENSSL_SYS_VOS_HPPA */
/* get wall clock time. */
clock_gettime(CLOCK_REALTIME, &ts);
/* take 8 bits */
v = (unsigned char)(ts.tv_nsec % 256);
RAND_add(&v, sizeof(v), 1);
v = 0;
}
return 1;
}
# elif defined __OpenBSD__
int RAND_poll(void)
{
u_int32_t rnd = 0, i;
unsigned char buf[ENTROPY_NEEDED];
for (i = 0; i < sizeof(buf); i++) {
if (i % 4 == 0)
rnd = arc4random();
buf[i] = rnd;
rnd >>= 8;
}
RAND_add(buf, sizeof(buf), ENTROPY_NEEDED);
OPENSSL_cleanse(buf, sizeof(buf));
return 1;
}
# else /* !defined(__OpenBSD__) */
int RAND_poll(void)
{
unsigned long l;
pid_t curr_pid = getpid();
# if defined(DEVRANDOM) || (!defined(OPENSS_NO_EGD) && defined(DEVRANDOM_EGD))
unsigned char tmpbuf[ENTROPY_NEEDED];
int n = 0;
# endif
# ifdef DEVRANDOM
static const char *randomfiles[] = { DEVRANDOM };
struct stat randomstats[OSSL_NELEM(randomfiles)];
int fd;
unsigned int i;
# endif
# if !defined(OPENSSL_NO_EGD) && defined(DEVRANDOM_EGD)
static const char *egdsockets[] = { DEVRANDOM_EGD, NULL };
const char **egdsocket = NULL;
# endif
# ifdef DEVRANDOM
memset(randomstats, 0, sizeof(randomstats));
/*
* Use a random entropy pool device. Linux, FreeBSD and OpenBSD have
* this. Use /dev/urandom if you can as /dev/random may block if it runs
* out of random entries.
*/
for (i = 0; (i < OSSL_NELEM(randomfiles)) && (n < ENTROPY_NEEDED); i++) {
if ((fd = open(randomfiles[i], O_RDONLY
# ifdef O_NONBLOCK
| O_NONBLOCK
# endif
# ifdef O_BINARY
| O_BINARY
# endif
# ifdef O_NOCTTY /* If it happens to be a TTY (god forbid), do
* not make it our controlling tty */
| O_NOCTTY
# endif
)) >= 0) {
int usec = 10 * 1000; /* spend 10ms on each file */
int r;
unsigned int j;
struct stat *st = &randomstats[i];
/*
* Avoid using same input... Used to be O_NOFOLLOW above, but
* it's not universally appropriate...
*/
if (fstat(fd, st) != 0) {
close(fd);
continue;
}
for (j = 0; j < i; j++) {
if (randomstats[j].st_ino == st->st_ino &&
randomstats[j].st_dev == st->st_dev)
break;
}
if (j < i) {
close(fd);
continue;
}
do {
int try_read = 0;
# if defined(OPENSSL_SYS_LINUX)
/* use poll() */
struct pollfd pset;
pset.fd = fd;
pset.events = POLLIN;
pset.revents = 0;
if (poll(&pset, 1, usec / 1000) < 0)
usec = 0;
else
try_read = (pset.revents & POLLIN) != 0;
# else
/* use select() */
fd_set fset;
struct timeval t;
t.tv_sec = 0;
t.tv_usec = usec;
if (FD_SETSIZE > 0 && (unsigned)fd >= FD_SETSIZE) {
/*
* can't use select, so just try to read once anyway
*/
try_read = 1;
} else {
FD_ZERO(&fset);
FD_SET(fd, &fset);
if (select(fd + 1, &fset, NULL, NULL, &t) >= 0) {
usec = t.tv_usec;
if (FD_ISSET(fd, &fset))
try_read = 1;
} else
usec = 0;
}
# endif
if (try_read) {
r = read(fd, (unsigned char *)tmpbuf + n,
ENTROPY_NEEDED - n);
if (r > 0)
n += r;
} else
r = -1;
/*
* Some Unixen will update t in select(), some won't. For
* those who won't, or if we didn't use select() in the first
* place, give up here, otherwise, we will do this once again
* for the remaining time.
*/
if (usec == 10 * 1000)
usec = 0;
}
while ((r > 0 ||
(errno == EINTR || errno == EAGAIN)) && usec != 0
&& n < ENTROPY_NEEDED);
close(fd);
}
}
# endif /* defined(DEVRANDOM) */
# if !defined(OPENSSL_NO_EGD) && defined(DEVRANDOM_EGD)
/*
* Use an EGD socket to read entropy from an EGD or PRNGD entropy
* collecting daemon.
*/
for (egdsocket = egdsockets; *egdsocket && n < ENTROPY_NEEDED;
egdsocket++) {
int r;
r = RAND_query_egd_bytes(*egdsocket, (unsigned char *)tmpbuf + n,
ENTROPY_NEEDED - n);
if (r > 0)
n += r;
}
# endif /* defined(DEVRANDOM_EGD) */
# if defined(DEVRANDOM) || (!defined(OPENSSL_NO_EGD) && defined(DEVRANDOM_EGD))
if (n > 0) {
RAND_add(tmpbuf, sizeof(tmpbuf), (double)n);
OPENSSL_cleanse(tmpbuf, n);
}
# endif
/* put in some default random data, we need more than just this */
l = curr_pid;
RAND_add(&l, sizeof(l), 0.0);
l = getuid();
RAND_add(&l, sizeof(l), 0.0);
l = time(NULL);
RAND_add(&l, sizeof(l), 0.0);
# if defined(DEVRANDOM) || (!defined(OPENSSL_NO_EGD) && defined(DEVRANDOM_EGD))
return 1;
# else
return 0;
# endif
}
# endif /* defined(__OpenBSD__) */
#endif /* !(defined(OPENSSL_SYS_WINDOWS) ||
* defined(OPENSSL_SYS_WIN32) ||
* defined(OPENSSL_SYS_VMS) ||
* defined(OPENSSL_SYS_VXWORKS) */
#if defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)
int RAND_poll(void)
{
return 0;
}
#endif
crypto/rand/rand_vms.c
+133
View File
@@ -0,0 +1,133 @@
/*
* Copyright 2001-2016 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
*/
/*
* Modified by VMS Software, Inc (2016)
* Eliminate looping through all processes (performance)
* Add additional randomizations using rand() function
*/
#include <openssl/rand.h>
#include "rand_lcl.h"
#if defined(OPENSSL_SYS_VMS)
# include <descrip.h>
# include <jpidef.h>
# include <ssdef.h>
# include <starlet.h>
# include <efndef>
# ifdef __DECC
# pragma message disable DOLLARID
# endif
/*
* Use 32-bit pointers almost everywhere. Define the type to which to cast a
* pointer passed to an external function.
*/
# if __INITIAL_POINTER_SIZE == 64
# define PTR_T __void_ptr64
# pragma pointer_size save
# pragma pointer_size 32
# else /* __INITIAL_POINTER_SIZE == 64 */
# define PTR_T void *
# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
static struct items_data_st {
short length, code; /* length is number of bytes */
} items_data[] = {
{4, JPI$_BUFIO},
{4, JPI$_CPUTIM},
{4, JPI$_DIRIO},
{4, JPI$_IMAGECOUNT},
{8, JPI$_LAST_LOGIN_I},
{8, JPI$_LOGINTIM},
{4, JPI$_PAGEFLTS},
{4, JPI$_PID},
{4, JPI$_PPGCNT},
{4, JPI$_WSPEAK},
{4, JPI$_FINALEXC},
{0, 0} /* zero terminated */
};
int RAND_poll(void)
{
/* determine the number of items in the JPI array */
struct items_data_st item_entry;
int item_entry_count = sizeof(items_data)/sizeof(item_entry);
/* Create the JPI itemlist array to hold item_data content */
struct {
short length, code;
int *buffer;
int *retlen;
} item[item_entry_count], *pitem; /* number of entries in items_data */
struct items_data_st *pitems_data;
int data_buffer[(item_entry_count*2)+4]; /* 8 bytes per entry max */
int iosb[2];
int sys_time[2];
int *ptr;
int i, j ;
int tmp_length = 0;
int total_length = 0;
pitems_data = items_data;
pitem = item;
/* Setup itemlist for GETJPI */
while (pitems_data->length) {
pitem->length = pitems_data->length;
pitem->code = pitems_data->code;
pitem->buffer = &data_buffer[total_length];
pitem->retlen = 0;
/* total_length is in longwords */
total_length += pitems_data->length/4;
pitems_data++;
pitem ++;
}
pitem->length = pitem->code = 0;
/* Fill data_buffer with various info bits from this process */
/* and twist that data to seed the SSL random number init */
if (sys$getjpiw(EFN$C_ENF, NULL, NULL, item, &iosb, 0, 0) == SS$_NORMAL) {
for (i = 0; i < total_length; i++) {
sys$gettim((struct _generic_64 *)&sys_time[0]);
srand(sys_time[0] * data_buffer[0] * data_buffer[1] + i);
if (i == (total_length - 1)) { /* for JPI$_FINALEXC */
ptr = &data_buffer[i];
for (j = 0; j < 4; j++) {
data_buffer[i + j] = ptr[j];
/* OK to use rand() just to scramble the seed */
data_buffer[i + j] ^= (sys_time[0] ^ rand());
tmp_length++;
}
} else {
/* OK to use rand() just to scramble the seed */
data_buffer[i] ^= (sys_time[0] ^ rand());
}
}
total_length += (tmp_length - 1);
/* size of seed is total_length*4 bytes (64bytes) */
RAND_add((PTR_T) data_buffer, total_length*4, total_length * 2);
} else {
return 0;
}
return 1;
}
#endif
crypto/rand/rand_win.c
+135
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@@ -0,0 +1,135 @@
/*
* 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
*/
#include "internal/cryptlib.h"
#include <openssl/rand.h>
#include "rand_lcl.h"
#if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
# include <windows.h>
/* On Windows 7 or higher use BCrypt instead of the legacy CryptoAPI */
# if defined(_MSC_VER) && defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0601
# define RAND_WINDOWS_USE_BCRYPT
# endif
# ifdef RAND_WINDOWS_USE_BCRYPT
# include <bcrypt.h>
# pragma comment(lib, "bcrypt.lib")
# ifndef STATUS_SUCCESS
# define STATUS_SUCCESS ((NTSTATUS)0x00000000L)
# endif
# else
# include <wincrypt.h>
/*
* Intel hardware RNG CSP -- available from
* http://developer.intel.com/design/security/rng/redist_license.htm
*/
# define PROV_INTEL_SEC 22
# define INTEL_DEF_PROV L"Intel Hardware Cryptographic Service Provider"
# endif
static void readtimer(void);
int RAND_poll(void)
{
MEMORYSTATUS mst;
# ifndef RAND_WINDOWS_USE_BCRYPT
HCRYPTPROV hProvider;
# endif
DWORD w;
BYTE buf[64];
# ifdef RAND_WINDOWS_USE_BCRYPT
if (BCryptGenRandom(NULL, buf, (ULONG)sizeof(buf), BCRYPT_USE_SYSTEM_PREFERRED_RNG) == STATUS_SUCCESS) {
RAND_add(buf, sizeof(buf), sizeof(buf));
}
# else
/* poll the CryptoAPI PRNG */
/* The CryptoAPI returns sizeof(buf) bytes of randomness */
if (CryptAcquireContextW(&hProvider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
RAND_add(buf, sizeof(buf), sizeof(buf));
}
CryptReleaseContext(hProvider, 0);
}
/* poll the Pentium PRG with CryptoAPI */
if (CryptAcquireContextW(&hProvider, NULL, INTEL_DEF_PROV, PROV_INTEL_SEC, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
if (CryptGenRandom(hProvider, (DWORD)sizeof(buf), buf) != 0) {
RAND_add(buf, sizeof(buf), sizeof(buf));
}
CryptReleaseContext(hProvider, 0);
}
# endif
/* timer data */
readtimer();
/* memory usage statistics */
GlobalMemoryStatus(&mst);
RAND_add(&mst, sizeof(mst), 1);
/* process ID */
w = GetCurrentProcessId();
RAND_add(&w, sizeof(w), 1);
return (1);
}
#if OPENSSL_API_COMPAT < 0x10100000L
int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
{
RAND_poll();
return RAND_status();
}
void RAND_screen(void)
{
RAND_poll();
}
#endif
/* feed timing information to the PRNG */
static void readtimer(void)
{
DWORD w;
LARGE_INTEGER l;
static int have_perfc = 1;
# if defined(_MSC_VER) && defined(_M_X86)
static int have_tsc = 1;
DWORD cyclecount;
if (have_tsc) {
__try {
__asm {
_emit 0x0f _emit 0x31 mov cyclecount, eax}
RAND_add(&cyclecount, sizeof(cyclecount), 1);
}
__except(EXCEPTION_EXECUTE_HANDLER) {
have_tsc = 0;
}
}
# else
# define have_tsc 0
# endif
if (have_perfc) {
if (QueryPerformanceCounter(&l) == 0)
have_perfc = 0;
else
RAND_add(&l, sizeof(l), 0);
}
if (!have_tsc && !have_perfc) {
w = GetTickCount();
RAND_add(&w, sizeof(w), 0);
}
}
#endif
crypto/rand/randfile.c
+364
View File
@@ -0,0 +1,364 @@
/*
* 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
*/
#include "internal/cryptlib.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/buffer.h>
#ifdef OPENSSL_SYS_VMS
# include <unixio.h>
#endif
#include <sys/types.h>
#ifndef OPENSSL_NO_POSIX_IO
# include <sys/stat.h>
# include <fcntl.h>
/*
* Following should not be needed, and we could have been stricter
* and demand S_IS*. But some systems just don't comply... Formally
* below macros are "anatomically incorrect", because normally they
* would look like ((m) & MASK == TYPE), but since MASK availability
* is as questionable, we settle for this poor-man fallback...
*/
# if !defined(S_ISBLK)
# if defined(_S_IFBLK)
# define S_ISBLK(m) ((m) & _S_IFBLK)
# elif defined(S_IFBLK)
# define S_ISBLK(m) ((m) & S_IFBLK)
# elif defined(_WIN32)
# define S_ISBLK(m) 0 /* no concept of block devices on Windows */
# endif
# endif
# if !defined(S_ISCHR)
# if defined(_S_IFCHR)
# define S_ISCHR(m) ((m) & _S_IFCHR)
# elif defined(S_IFCHR)
# define S_ISCHR(m) ((m) & S_IFCHR)
# endif
# endif
#endif
#ifdef _WIN32
# define stat _stat
# define chmod _chmod
# define open _open
# define fdopen _fdopen
# define fstat _fstat
# define fileno _fileno
#endif
#undef BUFSIZE
#define BUFSIZE 1024
#define RAND_DATA 1024
#ifdef OPENSSL_SYS_VMS
/*
* Misc hacks needed for specific cases.
*
* __FILE_ptr32 is a type provided by DEC C headers (types.h specifically)
* to make sure the FILE* is a 32-bit pointer no matter what. We know that
* stdio function return this type (a study of stdio.h proves it).
* Additionally, we create a similar char pointer type for the sake of
* vms_setbuf below.
*/
# if __INITIAL_POINTER_SIZE == 64
# pragma pointer_size save
# pragma pointer_size 32
typedef char *char_ptr32;
# pragma pointer_size restore
/*
* On VMS, setbuf() will only take 32-bit pointers, and a compilation
* with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here.
* Since we know that the FILE* really is a 32-bit pointer expanded to
* 64 bits, we also know it's safe to convert it back to a 32-bit pointer.
* As for the buffer parameter, we only use NULL here, so that passes as
* well...
*/
# define setbuf(fp,buf) (setbuf)((__FILE_ptr32)(fp), (char_ptr32)(buf))
# endif
/*
* This declaration is a nasty hack to get around vms' extension to fopen for
* passing in sharing options being disabled by /STANDARD=ANSI89
*/
static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) =
(__FILE_ptr32 (*)(const char *, const char *, ...))fopen;
# define VMS_OPEN_ATTRS "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0"
# define openssl_fopen(fname,mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS)
#endif
#define RFILE ".rnd"
/*
* Note that these functions are intended for seed files only. Entropy
* devices and EGD sockets are handled in rand_unix.c
*/
int RAND_load_file(const char *file, long bytes)
{
/*-
* If bytes >= 0, read up to 'bytes' bytes.
* if bytes == -1, read complete file.
*/
unsigned char buf[BUFSIZE];
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
#endif
int i, ret = 0, n;
FILE *in = NULL;
if (file == NULL)
return 0;
if (bytes == 0)
return ret;
in = openssl_fopen(file, "rb");
if (in == NULL)
goto err;
#ifndef OPENSSL_NO_POSIX_IO
/*
* struct stat can have padding and unused fields that may not be
* initialized in the call to stat(). We need to clear the entire
* structure before calling RAND_add() to avoid complaints from
* applications such as Valgrind.
*/
memset(&sb, 0, sizeof(sb));
if (fstat(fileno(in), &sb) < 0)
goto err;
RAND_add(&sb, sizeof(sb), 0.0);
# if defined(S_ISBLK) && defined(S_ISCHR)
if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
/*
* this file is a device. we don't want read an infinite number of
* bytes from a random device, nor do we want to use buffered I/O
* because we will waste system entropy.
*/
bytes = (bytes == -1) ? 2048 : bytes; /* ok, is 2048 enough? */
setbuf(in, NULL); /* don't do buffered reads */
}
# endif
#endif
for (;;) {
if (bytes > 0)
n = (bytes < BUFSIZE) ? (int)bytes : BUFSIZE;
else
n = BUFSIZE;
i = fread(buf, 1, n, in);
if (i <= 0)
break;
RAND_add(buf, i, (double)i);
ret += i;
if (bytes > 0) {
bytes -= n;
if (bytes <= 0)
break;
}
}
OPENSSL_cleanse(buf, BUFSIZE);
err:
if (in != NULL)
fclose(in);
return ret;
}
int RAND_write_file(const char *file)
{
unsigned char buf[BUFSIZE];
int i, ret = 0, rand_err = 0;
FILE *out = NULL;
int n;
#ifndef OPENSSL_NO_POSIX_IO
struct stat sb;
# if defined(S_ISBLK) && defined(S_ISCHR)
# ifdef _WIN32
/*
* Check for |file| being a driver as "ASCII-safe" on Windows,
* because driver paths are always ASCII.
*/
# endif
i = stat(file, &sb);
if (i != -1) {
if (S_ISBLK(sb.st_mode) || S_ISCHR(sb.st_mode)) {
/*
* this file is a device. we don't write back to it. we
* "succeed" on the assumption this is some sort of random
* device. Otherwise attempting to write to and chmod the device
* causes problems.
*/
return 1;
}
}
# endif
#endif
#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \
!defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS)
{
# ifndef O_BINARY
# define O_BINARY 0
# endif
/*
* chmod(..., 0600) is too late to protect the file, permissions
* should be restrictive from the start
*/
int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600);
if (fd != -1)
out = fdopen(fd, "wb");
}
#endif
#ifdef OPENSSL_SYS_VMS
/*
* VMS NOTE: Prior versions of this routine created a _new_ version of
* the rand file for each call into this routine, then deleted all
* existing versions named ;-1, and finally renamed the current version
* as ';1'. Under concurrent usage, this resulted in an RMS race
* condition in rename() which could orphan files (see vms message help
* for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares
* the top-level version of the rand file. Note that there may still be
* conditions where the top-level rand file is locked. If so, this code
* will then create a new version of the rand file. Without the delete
* and rename code, this can result in ascending file versions that stop
* at version 32767, and this routine will then return an error. The
* remedy for this is to recode the calling application to avoid
* concurrent use of the rand file, or synchronize usage at the
* application level. Also consider whether or not you NEED a persistent
* rand file in a concurrent use situation.
*/
out = openssl_fopen(file, "rb+");
#endif
if (out == NULL)
out = openssl_fopen(file, "wb");
if (out == NULL)
goto err;
#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO)
chmod(file, 0600);
#endif
n = RAND_DATA;
for (;;) {
i = (n > BUFSIZE) ? BUFSIZE : n;
n -= BUFSIZE;
if (RAND_bytes(buf, i) <= 0)
rand_err = 1;
i = fwrite(buf, 1, i, out);
if (i <= 0) {
ret = 0;
break;
}
ret += i;
if (n <= 0)
break;
}
fclose(out);
OPENSSL_cleanse(buf, BUFSIZE);
err:
return (rand_err ? -1 : ret);
}
const char *RAND_file_name(char *buf, size_t size)
{
char *s = NULL;
int use_randfile = 1;
#ifdef __OpenBSD__
struct stat sb;
#endif
#if defined(_WIN32) && defined(CP_UTF8)
DWORD len;
WCHAR *var, *val;
if ((var = L"RANDFILE",
len = GetEnvironmentVariableW(var, NULL, 0)) == 0
&& (var = L"HOME", use_randfile = 0,
len = GetEnvironmentVariableW(var, NULL, 0)) == 0
&& (var = L"USERPROFILE",
len = GetEnvironmentVariableW(var, NULL, 0)) == 0) {
var = L"SYSTEMROOT",
len = GetEnvironmentVariableW(var, NULL, 0);
}
if (len != 0) {
int sz;
val = _alloca(len * sizeof(WCHAR));
if (GetEnvironmentVariableW(var, val, len) < len
&& (sz = WideCharToMultiByte(CP_UTF8, 0, val, -1, NULL, 0,
NULL, NULL)) != 0) {
s = _alloca(sz);
if (WideCharToMultiByte(CP_UTF8, 0, val, -1, s, sz,
NULL, NULL) == 0)
s = NULL;
}
}
#else
if (OPENSSL_issetugid() != 0) {
use_randfile = 0;
} else {
s = getenv("RANDFILE");
if (s == NULL || *s == '\0') {
use_randfile = 0;
s = getenv("HOME");
}
}
#endif
#ifdef DEFAULT_HOME
if (!use_randfile && s == NULL) {
s = DEFAULT_HOME;
}
#endif
if (s != NULL && *s) {
size_t len = strlen(s);
if (use_randfile && len + 1 < size) {
if (OPENSSL_strlcpy(buf, s, size) >= size)
return NULL;
} else if (len + strlen(RFILE) + 2 < size) {
OPENSSL_strlcpy(buf, s, size);
#ifndef OPENSSL_SYS_VMS
OPENSSL_strlcat(buf, "/", size);
#endif
OPENSSL_strlcat(buf, RFILE, size);
}
} else {
buf[0] = '\0'; /* no file name */
}
#ifdef __OpenBSD__
/*
* given that all random loads just fail if the file can't be seen on a
* stat, we stat the file we're returning, if it fails, use /dev/arandom
* instead. this allows the user to use their own source for good random
* data, but defaults to something hopefully decent if that isn't
* available.
*/
if (!buf[0] || stat(buf, &sb) == -1)
if (OPENSSL_strlcpy(buf, "/dev/arandom", size) >= size) {
return NULL;
}
#endif
return buf[0] ? buf : NULL;
}