* Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
* Copyright 2004-2009 Novell, Inc (http://www.novell.com)
* Copyright 2001 Xamarin, Inc (http://www.novell.com)
+ * Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
-
#include <glib.h>
#include <config.h>
#include "atomic.h"
+#include "mono-error.h"
+#include "mono-error-internals.h"
#include "mono-rand.h"
#include "mono-threads.h"
#include "metadata/exception.h"
#include "metadata/object.h"
#ifdef HOST_WIN32
-
-#include <windows.h>
-#include <wincrypt.h>
-
-#ifndef PROV_INTEL_SEC
-#define PROV_INTEL_SEC 22
-#endif
-#ifndef CRYPT_VERIFY_CONTEXT
-#define CRYPT_VERIFY_CONTEXT 0xF0000000
-#endif
-
-gboolean
-mono_rand_open (void)
-{
- /* FALSE == Local (instance) handle for randomness */
- return FALSE;
-}
-
-gpointer
-mono_rand_init (guchar *seed, gint seed_size)
-{
- HCRYPTPROV provider = 0;
-
- /* There is no need to create a container for just random data,
- * so we can use CRYPT_VERIFY_CONTEXT (one call) see:
- * http://blogs.msdn.com/dangriff/archive/2003/11/19/51709.aspx */
-
- /* We first try to use the Intel PIII RNG if drivers are present */
- if (!CryptAcquireContext (&provider, NULL, NULL, PROV_INTEL_SEC, CRYPT_VERIFY_CONTEXT)) {
- /* not a PIII or no drivers available, use default RSA CSP */
- if (!CryptAcquireContext (&provider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFY_CONTEXT)) {
- /* exception will be thrown in managed code */
- provider = 0;
- }
- }
-
- /* seed the CSP with the supplied buffer (if present) */
- if (provider != 0 && seed) {
- /* the call we replace the seed with random - this isn't what is
- * expected from the class library user */
- guchar *data = g_malloc (seed_size);
- if (data) {
- memcpy (data, seed, seed_size);
- /* add seeding material to the RNG */
- CryptGenRandom (provider, seed_size, data);
- /* zeroize and free */
- memset (data, 0, seed_size);
- g_free (data);
- }
- }
-
- return (gpointer) provider;
-}
-
-gboolean
-mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size)
-{
- HCRYPTPROV provider;
-
- g_assert (handle);
- provider = (HCRYPTPROV) *handle;
-
- if (!CryptGenRandom (provider, buffer_size, buffer)) {
- CryptReleaseContext (provider, 0);
- /* we may have lost our context with CryptoAPI, but all hope isn't lost yet! */
- provider = (HCRYPTPROV) mono_rand_init (NULL, 0);
- if (!CryptGenRandom (provider, buffer_size, buffer)) {
- /* exception will be thrown in managed code */
- CryptReleaseContext (provider, 0);
- *handle = 0;
- return FALSE;
- }
- }
- return TRUE;
-}
-
-void
-mono_rand_close (gpointer handle)
-{
- CryptReleaseContext ((HCRYPTPROV) handle, 0);
-}
-
+// Windows specific implementation in mono-rand-windows.c
#elif defined (HAVE_SYS_UN_H) && !defined(__native_client__)
#include <errno.h>
static gint file = -1;
static void
-get_entropy_from_egd (const char *path, guchar *buffer, int buffer_size)
+get_entropy_from_egd (const char *path, guchar *buffer, int buffer_size, MonoError *error)
{
struct sockaddr_un egd_addr;
- gint file;
+ gint socket_fd;
gint ret;
guint offset = 0;
+ int err = 0;
- file = socket (PF_UNIX, SOCK_STREAM, 0);
- if (file < 0) {
+ mono_error_init (error);
+
+ socket_fd = socket (PF_UNIX, SOCK_STREAM, 0);
+ if (socket_fd < 0) {
ret = -1;
+ err = errno;
} else {
egd_addr.sun_family = AF_UNIX;
strncpy (egd_addr.sun_path, path, sizeof (egd_addr.sun_path) - 1);
egd_addr.sun_path [sizeof (egd_addr.sun_path) - 1] = '\0';
- ret = connect (file, (struct sockaddr*) &egd_addr, sizeof (egd_addr));
+ ret = connect (socket_fd, (struct sockaddr*) &egd_addr, sizeof (egd_addr));
+ err = errno;
}
if (ret == -1) {
- if (file >= 0)
- close (file);
+ if (socket_fd >= 0)
+ close (socket_fd);
g_warning ("Entropy problem! Can't create or connect to egd socket %s", path);
- mono_raise_exception (mono_get_exception_execution_engine ("Failed to open egd socket"));
+ mono_error_set_execution_engine (error, "Failed to open egd socket %s: %s", path, strerror (err));
+ return;
}
while (buffer_size > 0) {
request [0] = 2;
request [1] = buffer_size < 255 ? buffer_size : 255;
while (count < 2) {
- int sent = write (file, request + count, 2 - count);
+ int sent = write (socket_fd, request + count, 2 - count);
+ err = errno;
if (sent >= 0) {
count += sent;
- } else if (errno == EINTR) {
+ } else if (err == EINTR) {
continue;
} else {
- close (file);
- g_warning ("Send egd request failed %d", errno);
- mono_raise_exception (mono_get_exception_execution_engine ("Failed to send request to egd socket"));
+ close (socket_fd);
+ g_warning ("Send egd request failed %d", err);
+ mono_error_set_execution_engine (error, "Failed to send request to egd socket: %s", strerror (err));
+ return;
}
}
count = 0;
while (count != request [1]) {
int received;
- received = read (file, buffer + offset, request [1] - count);
+ received = read (socket_fd, buffer + offset, request [1] - count);
+ err = errno;
if (received > 0) {
count += received;
offset += received;
- } else if (received < 0 && errno == EINTR) {
+ } else if (received < 0 && err == EINTR) {
continue;
} else {
- close (file);
- g_warning ("Receive egd request failed %d", errno);
- mono_raise_exception (mono_get_exception_execution_engine ("Failed to get response from egd socket"));
+ close (socket_fd);
+ g_warning ("Receive egd request failed %d", err);
+ mono_error_set_execution_engine (error, "Failed to get response from egd socket: %s", strerror(err));
+ return;
}
}
buffer_size -= request [1];
}
- close (file);
+ close (socket_fd);
}
gboolean
gpointer
mono_rand_init (guchar *seed, gint seed_size)
{
- /* if required exception will be thrown in managed code */
+ // file < 0 is expected in the egd case
return (!use_egd && file < 0) ? NULL : GINT_TO_POINTER (file);
}
gboolean
-mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size)
+mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size, MonoError *error)
{
g_assert (handle);
+ mono_error_init (error);
+
if (use_egd) {
const char *socket_path = g_getenv ("MONO_EGD_SOCKET");
/* exception will be thrown in managed code */
*handle = NULL;
return FALSE;
}
- get_entropy_from_egd (socket_path, buffer, buffer_size);
+ get_entropy_from_egd (socket_path, buffer, buffer_size, error);
} else {
/* Read until the buffer is filled. This may block if using NAME_DEV_RANDOM. */
gint count = 0;
continue;
g_warning("Entropy error! Error in read (%s).", strerror (errno));
/* exception will be thrown in managed code */
+ mono_error_set_execution_engine (error, "Entropy error! Error in read (%s).", strerror (errno));
return FALSE;
}
count += err;
gpointer
mono_rand_init (guchar *seed, gint seed_size)
{
- return NULL;
+ return "srand"; // NULL will be interpreted as failure; return arbitrary nonzero pointer
}
gboolean
-mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size)
+mono_rand_try_get_bytes (gpointer *handle, guchar *buffer, gint buffer_size, MonoError *error)
{
gint count = 0;
+ mono_error_init (error);
+
do {
if (buffer_size - count >= sizeof (gint32) && RAND_MAX >= 0xFFFFFFFF) {
*(gint32*) buffer = rand();
#endif
+/**
+ * mono_rand_try_get_uint32:
+ * @handle: A pointer to an RNG handle. Handle is set to NULL on failure.
+ * @val: A pointer to a 32-bit unsigned int, to which the result will be written.
+ * @min: Result will be greater than or equal to this value.
+ * @max: Result will be less than or equal to this value.
+ *
+ * Returns: FALSE on failure, TRUE on success.
+ *
+ * Extracts one 32-bit unsigned int from an RNG handle.
+ */
gboolean
-mono_rand_try_get_uint32 (gpointer *handle, guint32 *val, guint32 min, guint32 max)
+mono_rand_try_get_uint32 (gpointer *handle, guint32 *val, guint32 min, guint32 max, MonoError *error)
{
g_assert (val);
- if (!mono_rand_try_get_bytes (handle, (guchar*) val, sizeof (guint32)))
+ if (!mono_rand_try_get_bytes (handle, (guchar*) val, sizeof (guint32), error))
return FALSE;
- *val = (guint32) (((gdouble) *val) / G_MAXUINT32 * (max - min) + min);
+ double randomDouble = ((gdouble) *val) / ( ((double)G_MAXUINT32) + 1 ); // Range is [0,1)
+ *val = (guint32) (randomDouble * (max - min + 1) + min);
+
g_assert (*val >= min);
g_assert (*val <= max);
return TRUE;
-}
\ No newline at end of file
+}
projects / mono.git / blobdiff