* 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 <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"
#define CRYPT_VERIFY_CONTEXT 0xF0000000
#endif
+/**
+ * mono_rand_open:
+ *
+ * Returns: True if random source is global, false if mono_rand_init can be called repeatedly to get randomness instances.
+ *
+ * Initializes entire RNG system. Must be called once per process before calling mono_rand_init.
+ */
gboolean
mono_rand_open (void)
{
- /* FALSE == Local (instance) handle for randomness */
return FALSE;
}
+/**
+ * mono_rand_init:
+ * @seed: A string containing seed data
+ * @seed_size: Length of seed string
+ *
+ * Returns: On success, a non-NULL handle which can be used to fetch random data from mono_rand_try_get_bytes. On failure, NULL.
+ *
+ * Initializes an RNG client.
+ */
gpointer
mono_rand_init (guchar *seed, gint seed_size)
{
return (gpointer) provider;
}
+/**
+ * mono_rand_try_get_bytes:
+ * @handle: A pointer to an RNG handle. Handle is set to NULL on failure.
+ * @buffer: A buffer into which to write random data.
+ * @buffer_size: Number of bytes to write into buffer.
+ * @error: Set on error.
+ *
+ * Returns: FALSE on failure and sets @error, TRUE on success.
+ *
+ * Extracts bytes from an RNG handle.
+ */
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)
{
HCRYPTPROV provider;
+ mono_error_init (error);
+
g_assert (handle);
provider = (HCRYPTPROV) *handle;
/* exception will be thrown in managed code */
CryptReleaseContext (provider, 0);
*handle = 0;
+ mono_error_set_execution_engine (error, "Failed to gen random bytes (%d)", GetLastError ());
return FALSE;
}
}
return TRUE;
}
+/**
+ * mono_rand_close:
+ * @handle: An RNG handle.
+ * @buffer: A buffer into which to write random data.
+ * @buffer_size: Number of bytes to write into buffer.
+ *
+ * Releases an RNG handle.
+ */
void
mono_rand_close (gpointer handle)
{
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 ret;
guint offset = 0;
+ int err = 0;
+ mono_error_init (error);
+
file = socket (PF_UNIX, SOCK_STREAM, 0);
if (file < 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));
+ err = errno;
}
if (ret == -1) {
if (file >= 0)
close (file);
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 [1] = buffer_size < 255 ? buffer_size : 255;
while (count < 2) {
int sent = write (file, 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"));
+ 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;
}
}
while (count != request [1]) {
int received;
received = read (file, 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"));
+ 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;
}
}
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