OSCrypt for POSIX uses libsecret to store a randomised encryption key.

components/os_crypt/libsecret_util_posix.cc

Index: components/os_crypt/libsecret_util_posix.cc
diff --git a/components/os_crypt/libsecret_util_posix.cc b/components/os_crypt/libsecret_util_posix.cc
index 58ba9d0518aa4495a097fe4cba51de127d5a09ff..3e38899606a9e918703a204534a40972e30668c6 100644
--- a/components/os_crypt/libsecret_util_posix.cc
+++ b/components/os_crypt/libsecret_util_posix.cc
@@ -5,10 +5,16 @@
 #include "components/os_crypt/libsecret_util_posix.h"
 
 #include <dlfcn.h>
+#include <utility>

[vabr (Chromium), 2016/05/13 15:10:18]

What is this used for?

[cfroussios, 2016/05/13 17:09:12]

Done.

 
+#include "base/base64.h"

[vabr (Chromium), 2016/05/13 15:10:18]

And what is this used for?

[cfroussios, 2016/05/13 17:09:12]

Done.

 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 
+//
+// LibsecretLoader
+//
+
 decltype(
     &::secret_password_store_sync) LibsecretLoader::secret_password_store_sync;
 decltype(
@@ -22,24 +28,29 @@ decltype(
 decltype(&::secret_item_load_secret_sync)
     LibsecretLoader::secret_item_load_secret_sync;
 decltype(&::secret_value_unref) LibsecretLoader::secret_value_unref;
+decltype(
+    &::secret_service_lookup_sync) LibsecretLoader::secret_service_lookup_sync;
 
 bool LibsecretLoader::libsecret_loaded_ = false;
 
 const LibsecretLoader::FunctionInfo LibsecretLoader::kFunctions[] = {
-    {"secret_password_store_sync",
-     reinterpret_cast<void**>(&secret_password_store_sync)},
-    {"secret_service_search_sync",
-     reinterpret_cast<void**>(&secret_service_search_sync)},
-    {"secret_password_clear_sync",
-     reinterpret_cast<void**>(&secret_password_clear_sync)},
     {"secret_item_get_secret",
      reinterpret_cast<void**>(&secret_item_get_secret)},
-    {"secret_value_get_text", reinterpret_cast<void**>(&secret_value_get_text)},
     {"secret_item_get_attributes",
      reinterpret_cast<void**>(&secret_item_get_attributes)},
     {"secret_item_load_secret_sync",
      reinterpret_cast<void**>(&secret_item_load_secret_sync)},
-    {"secret_value_unref", reinterpret_cast<void**>(&secret_value_unref)}};
+    {"secret_password_clear_sync",
+     reinterpret_cast<void**>(&secret_password_clear_sync)},
+    {"secret_password_store_sync",
+     reinterpret_cast<void**>(&secret_password_store_sync)},
+    {"secret_service_lookup_sync",
+     reinterpret_cast<void**>(&secret_service_lookup_sync)},
+    {"secret_service_search_sync",
+     reinterpret_cast<void**>(&secret_service_search_sync)},
+    {"secret_value_get_text", reinterpret_cast<void**>(&secret_value_get_text)},
+    {"secret_value_unref", reinterpret_cast<void**>(&secret_value_unref)},
+};
 
 // static
 bool LibsecretLoader::EnsureLibsecretLoaded() {
@@ -107,6 +118,10 @@ bool LibsecretLoader::LibsecretIsAvailable() {
   return success;
 }
 
+//
+// LibsecretAttributesBuilder
+//
+
 LibsecretAttributesBuilder::LibsecretAttributesBuilder() {
   attrs_ = g_hash_table_new_full(g_str_hash, g_str_equal,
                                  nullptr,   // no deleter for keys