1 files changed, 189 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc b/toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc
new file mode 100644
index 0000000000..03e3d781fb
--- /dev/null
+++ b/toolkit/crashreporter/google-breakpad/src/common/linux/guid_creator.cc
@@ -0,0 +1,189 @@
+// Copyright (c) 2006, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * 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.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "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 COPYRIGHT
+// OWNER 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.
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "common/linux/eintr_wrapper.h"
+#include "common/linux/guid_creator.h"
+
+#include <assert.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <time.h>
+#include <unistd.h>
+
+#if defined(HAVE_SYS_RANDOM_H)
+#include <sys/random.h>
+#endif
+
+//
+// GUIDGenerator
+//
+// This class is used to generate random GUID.
+// Currently use random number to generate a GUID since Linux has
+// no native GUID generator. This should be OK since we don't expect
+// crash to happen very offen.
+//
+class GUIDGenerator {
+ public:
+  static uint32_t BytesToUInt32(const uint8_t bytes[]) {
+    return ((uint32_t) bytes[0]
+            | ((uint32_t) bytes[1] << 8)
+            | ((uint32_t) bytes[2] << 16)
+            | ((uint32_t) bytes[3] << 24));
+  }
+
+  static void UInt32ToBytes(uint8_t bytes[], uint32_t n) {
+    bytes[0] = n & 0xff;
+    bytes[1] = (n >> 8) & 0xff;
+    bytes[2] = (n >> 16) & 0xff;
+    bytes[3] = (n >> 24) & 0xff;
+  }
+
+  static bool CreateGUID(GUID *guid) {
+#if defined(HAVE_ARC4RANDOM) // Android, BSD, ...
+    CreateGuidFromArc4Random(guid);
+#else // Linux
+    bool success = false;
+
+#if defined(HAVE_SYS_RANDOM_H) && defined(HAVE_GETRANDOM)
+    success = CreateGUIDFromGetrandom(guid);
+#endif // HAVE_SYS_RANDOM_H && HAVE_GETRANDOM
+    if (!success) {
+      success = CreateGUIDFromDevUrandom(guid);
+    }
+
+    if (!success) {
+      CreateGUIDFromRand(guid);
+      success = true;
+    }
+#endif
+
+    // Put in the version according to RFC 4122.
+    guid->data3 &= 0x0fff;
+    guid->data3 |= 0x4000;
+
+    // Put in the variant according to RFC 4122.
+    guid->data4[0] &= 0x3f;
+    guid->data4[0] |= 0x80;
+
+    return true;
+  }
+
+ private:
+#ifdef HAVE_ARC4RANDOM
+  static void CreateGuidFromArc4Random(GUID *guid) {
+    char *buf = reinterpret_cast<char *>(guid);
+
+    for (size_t i = 0; i < sizeof(GUID); i += sizeof(uint32_t)) {
+      uint32_t random_data = arc4random();
+
+      memcpy(buf + i, &random_data, sizeof(uint32_t));
+    }
+  }
+#else
+  static void InitOnce() {
+    pthread_once(&once_control, &InitOnceImpl);
+  }
+
+  static void InitOnceImpl() {
+    // time(NULL) is a very poor seed, so lacking anything better mix an
+    // address into it. We drop the four rightmost bits as they're likely to
+    // be 0 on almost all architectures.
+    srand(time(NULL) | ((uintptr_t)&once_control >> 4));
+  }
+
+  static pthread_once_t once_control;
+
+#if defined(HAVE_SYS_RANDOM_H) && defined(HAVE_GETRANDOM)
+  static bool CreateGUIDFromGetrandom(GUID *guid) {
+    char *buf = reinterpret_cast<char *>(guid);
+    int read_bytes = getrandom(buf, sizeof(GUID), GRND_NONBLOCK);
+
+    return (read_bytes == static_cast<int>(sizeof(GUID)));
+  }
+#endif // HAVE_SYS_RANDOM_H && HAVE_GETRANDOM
+
+  // Populate the GUID using random bytes read from /dev/urandom, returns false
+  // if the GUID wasn't fully populated with random data.
+  static bool CreateGUIDFromDevUrandom(GUID *guid) {
+    char *buf = reinterpret_cast<char *>(guid);
+    int fd = open("/dev/urandom", O_RDONLY | O_CLOEXEC);
+
+    if (fd == -1) {
+      return false;
+    }
+
+    ssize_t read_bytes = HANDLE_EINTR(read(fd, buf, sizeof(GUID)));
+    close(fd);
+
+    return (read_bytes == static_cast<ssize_t>(sizeof(GUID)));
+  }
+
+  // Populate the GUID using a stream of random bytes obtained from rand().
+  static void CreateGUIDFromRand(GUID *guid) {
+    char *buf = reinterpret_cast<char *>(guid);
+
+    InitOnce();
+
+    for (size_t i = 0; i < sizeof(GUID); i++) {
+      buf[i] = rand();
+    }
+  }
+#endif
+};
+
+#ifndef HAVE_ARC4RANDOM
+pthread_once_t GUIDGenerator::once_control = PTHREAD_ONCE_INIT;
+#endif
+
+bool CreateGUID(GUID *guid) {
+  return GUIDGenerator::CreateGUID(guid);
+}
+
+// Parse guid to string.
+bool GUIDToString(const GUID *guid, char *buf, int buf_len) {
+  // Should allow more space the the max length of GUID.
+  assert(buf_len > kGUIDStringLength);
+  int num = snprintf(buf, buf_len, kGUIDFormatString,
+                     guid->data1, guid->data2, guid->data3,
+                     GUIDGenerator::BytesToUInt32(&(guid->data4[0])),
+                     GUIDGenerator::BytesToUInt32(&(guid->data4[4])));
+  if (num != kGUIDStringLength)
+    return false;
+
+  buf[num] = '\0';
+  return true;
+}