int prediction_resistance);
void rand_drbg_cleanup_entropy(RAND_DRBG *drbg,
unsigned char *out, size_t outlen);
+size_t rand_drbg_get_nonce(RAND_DRBG *drbg,
+ unsigned char **pout,
+ int entropy, size_t min_len, size_t max_len);
+void rand_drbg_cleanup_nonce(RAND_DRBG *drbg,
+ unsigned char *out, size_t outlen);
+
size_t rand_drbg_get_additional_data(unsigned char **pout, size_t max_len);
+void rand_drbg_cleanup_additional_data(unsigned char *out, size_t outlen);
/*
* RAND_POOL functions
*/
size_t rand_pool_acquire_entropy(RAND_POOL *pool);
+/*
+ * Add some application specific nonce data
+ *
+ * This function is platform specific and adds some application specific
+ * data to the nonce used for instantiating the drbg.
+ *
+ * This data currently consists of the process and thread id, and a high
+ * resolution timestamp. The data does not include an atomic counter,
+ * because that is added by the calling function rand_drbg_get_nonce().
+ *
+ * Returns 1 on success and 0 on failure.
+ */
+int rand_pool_add_nonce_data(RAND_POOL *pool);
+
+
+/*
+ * Add some platform specific additional data
+ *
+ * This function is platform specific and adds some random noise to the
+ * additional data used for generating random bytes and for reseeding
+ * the drbg.
+ *
+ * Returns 1 on success and 0 on failure.
+ */
+int rand_pool_add_additional_data(RAND_POOL *pool);
+
#endif
drbg->parent = parent;
if (parent == NULL) {
+ drbg->get_entropy = rand_drbg_get_entropy;
+ drbg->cleanup_entropy = rand_drbg_cleanup_entropy;
+#ifndef RAND_DRBG_GET_RANDOM_NONCE
+ drbg->get_nonce = rand_drbg_get_nonce;
+ drbg->cleanup_nonce = rand_drbg_cleanup_nonce;
+#endif
+
drbg->reseed_interval = master_reseed_interval;
drbg->reseed_time_interval = master_reseed_time_interval;
} else {
+ drbg->get_entropy = rand_drbg_get_entropy;
+ drbg->cleanup_entropy = rand_drbg_cleanup_entropy;
+ /*
+ * Do not provide nonce callbacks, the child DRBGs will
+ * obtain their nonce using random bits from the parent.
+ */
+
drbg->reseed_interval = slave_reseed_interval;
drbg->reseed_time_interval = slave_reseed_time_interval;
}
rand_drbg_unlock(parent);
}
- if (!RAND_DRBG_set_callbacks(drbg, rand_drbg_get_entropy,
- rand_drbg_cleanup_entropy,
- NULL, NULL))
- goto err;
-
return drbg;
err:
#include <openssl/engine.h>
#include "internal/thread_once.h"
#include "rand_lcl.h"
-#ifdef OPENSSL_SYS_UNIX
-# include <sys/types.h>
-# include <unistd.h>
-# include <sys/time.h>
-#endif
#include "e_os.h"
-/* Macro to convert two thirty two bit values into a sixty four bit one */
-#define TWO32TO64(a, b) ((((uint64_t)(a)) << 32) + (b))
-
-/*
- * Check for the existence and support of POSIX timers. The standard
- * says that the _POSIX_TIMERS macro will have a positive value if they
- * are available.
- *
- * However, we want an additional constraint: that the timer support does
- * not require an extra library dependency. Early versions of glibc
- * require -lrt to be specified on the link line to access the timers,
- * so this needs to be checked for.
- *
- * It is worse because some libraries define __GLIBC__ but don't
- * support the version testing macro (e.g. uClibc). This means
- * an extra check is needed.
- *
- * The final condition is:
- * "have posix timers and either not glibc or glibc without -lrt"
- *
- * The nested #if sequences are required to avoid using a parameterised
- * macro that might be undefined.
- */
-#undef OSSL_POSIX_TIMER_OKAY
-#if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
-# if defined(__GLIBC__)
-# if defined(__GLIBC_PREREQ)
-# if __GLIBC_PREREQ(2, 17)
-# define OSSL_POSIX_TIMER_OKAY
-# endif
-# endif
-# else
-# define OSSL_POSIX_TIMER_OKAY
-# endif
-#endif
-
#ifndef OPENSSL_NO_ENGINE
/* non-NULL if default_RAND_meth is ENGINE-provided */
static ENGINE *funct_ref;
int rand_fork_count;
+static CRYPTO_RWLOCK *rand_nonce_lock;
+static int rand_nonce_count;
+
#ifdef OPENSSL_RAND_SEED_RDTSC
/*
* IMPORTANT NOTE: It is not currently possible to use this code
}
/*
- * Find a suitable source of time. Start with the highest resolution source
- * and work down to the slower ones. This is added as additional data and
- * isn't counted as randomness, so any result is acceptable.
+ * Implements the cleanup_entropy() callback (see RAND_DRBG_set_callbacks())
*
- * Returns 0 when we weren't able to find any time source
*/
-static uint64_t get_timer_bits(void)
+void rand_drbg_cleanup_entropy(RAND_DRBG *drbg,
+ unsigned char *out, size_t outlen)
{
- uint64_t res = OPENSSL_rdtsc();
+ OPENSSL_secure_clear_free(out, outlen);
+}
- if (res != 0)
- return res;
-#if defined(_WIN32)
- {
- LARGE_INTEGER t;
- FILETIME ft;
- if (QueryPerformanceCounter(&t) != 0)
- return t.QuadPart;
- GetSystemTimeAsFileTime(&ft);
- return TWO32TO64(ft.dwHighDateTime, ft.dwLowDateTime);
- }
-#elif defined(__sun) || defined(__hpux)
- return gethrtime();
-#elif defined(_AIX)
- {
- timebasestruct_t t;
-
- read_wall_time(&t, TIMEBASE_SZ);
- return TWO32TO64(t.tb_high, t.tb_low);
- }
-#else
+/*
+ * Implements the get_nonce() callback (see RAND_DRBG_set_callbacks())
+ *
+ */
+size_t rand_drbg_get_nonce(RAND_DRBG *drbg,
+ unsigned char **pout,
+ int entropy, size_t min_len, size_t max_len)
+{
+ size_t ret = 0;
+ RAND_POOL *pool;
-# if defined(OSSL_POSIX_TIMER_OKAY)
- {
- struct timespec ts;
- clockid_t cid;
-
-# ifdef CLOCK_BOOTTIME
- cid = CLOCK_BOOTTIME;
-# elif defined(_POSIX_MONOTONIC_CLOCK)
- cid = CLOCK_MONOTONIC;
-# else
- cid = CLOCK_REALTIME;
-# endif
-
- if (clock_gettime(cid, &ts) == 0)
- return TWO32TO64(ts.tv_sec, ts.tv_nsec);
- }
-# endif
-# if defined(__unix__) \
- || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
- {
- struct timeval tv;
-
- if (gettimeofday(&tv, NULL) == 0)
- return TWO32TO64(tv.tv_sec, tv.tv_usec);
- }
-# endif
- {
- time_t t = time(NULL);
- if (t == (time_t)-1)
- return 0;
- return t;
- }
-#endif
+ struct {
+ void * instance;
+ int count;
+ } data = { 0 };
+
+ pool = rand_pool_new(0, min_len, max_len);
+ if (pool == NULL)
+ return 0;
+
+ if (rand_pool_add_nonce_data(pool) == 0)
+ goto err;
+
+ data.instance = drbg;
+ CRYPTO_atomic_add(&rand_nonce_count, 1, &data.count, rand_nonce_lock);
+
+ if (rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0) == 0)
+ goto err;
+
+ ret = rand_pool_length(pool);
+ *pout = rand_pool_detach(pool);
+
+ err:
+ rand_pool_free(pool);
+
+ return ret;
+}
+
+/*
+ * Implements the cleanup_nonce() callback (see RAND_DRBG_set_callbacks())
+ *
+ */
+void rand_drbg_cleanup_nonce(RAND_DRBG *drbg,
+ unsigned char *out, size_t outlen)
+{
+ OPENSSL_secure_clear_free(out, outlen);
}
/*
*/
size_t rand_drbg_get_additional_data(unsigned char **pout, size_t max_len)
{
+ size_t ret = 0;
RAND_POOL *pool;
- CRYPTO_THREAD_ID thread_id;
- size_t len;
-#ifdef OPENSSL_SYS_UNIX
- pid_t pid;
-#elif defined(OPENSSL_SYS_WIN32)
- DWORD pid;
-#endif
- uint64_t tbits;
pool = rand_pool_new(0, 0, max_len);
if (pool == NULL)
return 0;
-#ifdef OPENSSL_SYS_UNIX
- pid = getpid();
- rand_pool_add(pool, (unsigned char *)&pid, sizeof(pid), 0);
-#elif defined(OPENSSL_SYS_WIN32)
- pid = GetCurrentProcessId();
- rand_pool_add(pool, (unsigned char *)&pid, sizeof(pid), 0);
-#endif
-
- thread_id = CRYPTO_THREAD_get_current_id();
- if (thread_id != 0)
- rand_pool_add(pool, (unsigned char *)&thread_id, sizeof(thread_id), 0);
-
- tbits = get_timer_bits();
- if (tbits != 0)
- rand_pool_add(pool, (unsigned char *)&tbits, sizeof(tbits), 0);
+ if (rand_pool_add_additional_data(pool) == 0)
+ goto err;
- /* TODO: Use RDSEED? */
+ ret = rand_pool_length(pool);
+ *pout = rand_pool_detach(pool);
- len = rand_pool_length(pool);
- if (len != 0)
- *pout = rand_pool_detach(pool);
+ err:
rand_pool_free(pool);
- return len;
+ return ret;
}
-/*
- * Implements the cleanup_entropy() callback (see RAND_DRBG_set_callbacks())
- *
- */
-void rand_drbg_cleanup_entropy(RAND_DRBG *drbg,
- unsigned char *out, size_t outlen)
+void rand_drbg_cleanup_additional_data(unsigned char *out, size_t outlen)
{
OPENSSL_secure_clear_free(out, outlen);
}
rand_meth_lock = CRYPTO_THREAD_lock_new();
ret &= rand_meth_lock != NULL;
+ rand_nonce_lock = CRYPTO_THREAD_lock_new();
+ ret &= rand_meth_lock != NULL;
+
return ret;
}
CRYPTO_THREAD_lock_free(rand_engine_lock);
#endif
CRYPTO_THREAD_lock_free(rand_meth_lock);
+ CRYPTO_THREAD_lock_free(rand_nonce_lock);
}
/*
#include "rand_lcl.h"
#include "internal/rand_int.h"
#include <stdio.h>
+#ifdef OPENSSL_SYS_UNIX
+# include <sys/types.h>
+# include <unistd.h>
+# include <sys/time.h>
+
+static uint64_t get_time_stamp(void);
+static uint64_t get_timer_bits(void);
+
+/* Macro to convert two thirty two bit values into a sixty four bit one */
+# define TWO32TO64(a, b) ((((uint64_t)(a)) << 32) + (b))
+
+/*
+ * Check for the existence and support of POSIX timers. The standard
+ * says that the _POSIX_TIMERS macro will have a positive value if they
+ * are available.
+ *
+ * However, we want an additional constraint: that the timer support does
+ * not require an extra library dependency. Early versions of glibc
+ * require -lrt to be specified on the link line to access the timers,
+ * so this needs to be checked for.
+ *
+ * It is worse because some libraries define __GLIBC__ but don't
+ * support the version testing macro (e.g. uClibc). This means
+ * an extra check is needed.
+ *
+ * The final condition is:
+ * "have posix timers and either not glibc or glibc without -lrt"
+ *
+ * The nested #if sequences are required to avoid using a parameterised
+ * macro that might be undefined.
+ */
+# undef OSSL_POSIX_TIMER_OKAY
+# if defined(_POSIX_TIMERS) && _POSIX_TIMERS > 0
+# if defined(__GLIBC__)
+# if defined(__GLIBC_PREREQ)
+# if __GLIBC_PREREQ(2, 17)
+# define OSSL_POSIX_TIMER_OKAY
+# endif
+# endif
+# else
+# define OSSL_POSIX_TIMER_OKAY
+# endif
+# endif
+#endif
#if (defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_UEFI)) && \
!defined(OPENSSL_RAND_SEED_NONE)
size_t rand_pool_acquire_entropy(RAND_POOL *pool)
{
short int code;
- gid_t curr_gid;
- pid_t curr_pid;
- uid_t curr_uid;
int i, k;
size_t bytes_needed;
struct timespec ts;
extern void s$sleep2(long long *_duration, short int *_code);
# endif
- /*
- * Seed with the gid, pid, and uid, to ensure *some* variation between
- * different processes.
- */
- curr_gid = getgid();
- rand_pool_add(pool, &curr_gid, sizeof(curr_gid), 0);
- curr_pid = getpid();
- rand_pool_add(pool, &curr_pid, sizeof(curr_pid), 0);
- curr_uid = getuid();
- rand_pool_add(pool, &curr_uid, sizeof(curr_uid), 0);
-
bytes_needed = rand_pool_bytes_needed(pool, 2 /*entropy_per_byte*/);
for (i = 0; i < bytes_needed; i++) {
# endif
}
# endif
+#endif
+
+#ifdef OPENSSL_SYS_UNIX
+int rand_pool_add_nonce_data(RAND_POOL *pool)
+{
+ struct {
+ pid_t pid;
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data = { 0 };
+
+ /*
+ * Add process id, thread id, and a high resolution timestamp to
+ * ensure that the nonce is unique whith high probability for
+ * different process instances.
+ */
+ data.pid = getpid();
+ data.tid = CRYPTO_THREAD_get_current_id();
+ data.time = get_time_stamp();
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+int rand_pool_add_additional_data(RAND_POOL *pool)
+{
+ struct {
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data = { 0 };
+
+ /*
+ * Add some noise from the thread id and a high resolution timer.
+ * The thread id adds a little randomness if the drbg is accessed
+ * concurrently (which is the case for the <master> drbg).
+ */
+ data.tid = CRYPTO_THREAD_get_current_id();
+ data.time = get_timer_bits();
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+
+
+/*
+ * Get the current time with the highest possible resolution
+ *
+ * The time stamp is added to the nonce, so it is optimized for not repeating.
+ * The current time is ideal for this purpose, provided the computer's clock
+ * is synchronized.
+ */
+static uint64_t get_time_stamp(void)
+{
+# if defined(OSSL_POSIX_TIMER_OKAY)
+ {
+ struct timespec ts;
+
+ if (clock_gettime(CLOCK_REALTIME, &ts) == 0)
+ return TWO32TO64(ts.tv_sec, ts.tv_nsec);
+ }
+# endif
+# if defined(__unix__) \
+ || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
+ {
+ struct timeval tv;
+
+ if (gettimeofday(&tv, NULL) == 0)
+ return TWO32TO64(tv.tv_sec, tv.tv_usec);
+ }
+# endif
+ return time(NULL);
+}
+
+/*
+ * Get an arbitrary timer value of the highest possible resolution
+ *
+ * The timer value is added as random noise to the additional data,
+ * which is not considered a trusted entropy sourec, so any result
+ * is acceptable.
+ */
+static uint64_t get_timer_bits(void)
+{
+ uint64_t res = OPENSSL_rdtsc();
+
+ if (res != 0)
+ return res;
+
+# if defined(__sun) || defined(__hpux)
+ return gethrtime();
+# elif defined(_AIX)
+ {
+ timebasestruct_t t;
+
+ read_wall_time(&t, TIMEBASE_SZ);
+ return TWO32TO64(t.tb_high, t.tb_low);
+ }
+# elif defined(OSSL_POSIX_TIMER_OKAY)
+ {
+ struct timespec ts;
+
+# ifdef CLOCK_BOOTTIME
+# define CLOCK_TYPE CLOCK_BOOTTIME
+# elif defined(_POSIX_MONOTONIC_CLOCK)
+# define CLOCK_TYPE CLOCK_MONOTONIC
+# else
+# define CLOCK_TYPE CLOCK_REALTIME
+# endif
+
+ if (clock_gettime(CLOCK_TYPE, &ts) == 0)
+ return TWO32TO64(ts.tv_sec, ts.tv_nsec);
+ }
+# endif
+# if defined(__unix__) \
+ || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
+ {
+ struct timeval tv;
+ if (gettimeofday(&tv, NULL) == 0)
+ return TWO32TO64(tv.tv_sec, tv.tv_usec);
+ }
+# endif
+ return time(NULL);
+}
#endif
#include "e_os.h"
#if defined(OPENSSL_SYS_VMS)
+# include <unistd.h>
# include "internal/cryptlib.h"
# include <openssl/rand.h>
# include "internal/rand_int.h"
return rand_pool_entropy_available(pool);
}
+int rand_pool_add_nonce_data(RAND_POOL *pool)
+{
+ struct {
+ pid_t pid;
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data = { 0 };
+
+ /*
+ * Add process id, thread id, and a high resolution timestamp to
+ * ensure that the nonce is unique whith high probability for
+ * different process instances.
+ */
+ data.pid = getpid();
+ data.tid = CRYPTO_THREAD_get_current_id();
+ sys$gettim_prec((struct _generic_64 *)&data.time);
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+int rand_pool_add_additional_data(RAND_POOL *pool)
+{
+ struct {
+ CRYPTO_THREAD_ID tid;
+ uint64_t time;
+ } data = { 0 };
+
+ /*
+ * Add some noise from the thread id and a high resolution timer.
+ * The thread id adds a little randomness if the drbg is accessed
+ * concurrently (which is the case for the <master> drbg).
+ */
+ data.tid = CRYPTO_THREAD_get_current_id();
+ sys$gettim_prec((struct _generic_64 *)&data.time);
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
#endif
return rand_pool_entropy_available(pool);
}
+
+int rand_pool_add_nonce_data(RAND_POOL *pool)
+{
+ struct {
+ DWORD pid;
+ DWORD tid;
+ FILETIME time;
+ } data = { 0 };
+
+ /*
+ * Add process id, thread id, and a high resolution timestamp to
+ * ensure that the nonce is unique whith high probability for
+ * different process instances.
+ */
+ data.pid = GetCurrentProcessId();
+ data.tid = GetCurrentThreadId();
+ GetSystemTimeAsFileTime(&data.time);
+
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
+int rand_pool_add_additional_data(RAND_POOL *pool)
+{
+ struct {
+ DWORD tid;
+ LARGE_INTEGER time;
+ } data = { 0 };
+
+ /*
+ * Add some noise from the thread id and a high resolution timer.
+ * The thread id adds a little randomness if the drbg is accessed
+ * concurrently (which is the case for the <master> drbg).
+ */
+ data.tid = GetCurrentThreadId();
+ QueryPerformanceCounter(&data.time);
+ return rand_pool_add(pool, (unsigned char *)&data, sizeof(data), 0);
+}
+
# if OPENSSL_API_COMPAT < 0x10100000L
int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam)
{
projects / oweals / openssl.git / commitdiff