ppapi/proxy/platform_verification_private_resource.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/proxy/platform_verification_private_resource.h"
   6
   7 #include "base/bind.h"
   8 #include "ppapi/c/pp_errors.h"
   9 #include "ppapi/proxy/dispatch_reply_message.h"
  10 #include "ppapi/proxy/ppapi_messages.h"
  11 #include "ppapi/shared_impl/ppapi_globals.h"
  12 #include "ppapi/shared_impl/tracked_callback.h"
  13 #include "ppapi/shared_impl/var.h"
  14 #include "ppapi/shared_impl/var_tracker.h"
  15
  16 namespace ppapi {
  17 namespace proxy {
  18
  19 PlatformVerificationPrivateResource::PlatformVerificationPrivateResource(
  20     Connection connection,
  21     PP_Instance instance)
  22     : PluginResource(connection, instance) {
  23   SendCreate(BROWSER, PpapiHostMsg_PlatformVerification_Create());
  24 }
  25
  26 PlatformVerificationPrivateResource::~PlatformVerificationPrivateResource() {}
  27
  28 thunk::PPB_PlatformVerification_API*
  29 PlatformVerificationPrivateResource::AsPPB_PlatformVerification_API() {
  30   return this;
  31 }
  32
  33 int32_t PlatformVerificationPrivateResource::ChallengePlatform(
  34     const PP_Var& service_id,
  35     const PP_Var& challenge,
  36     PP_Var* signed_data,
  37     PP_Var* signed_data_signature,
  38     PP_Var* platform_key_certificate,
  39     const scoped_refptr<TrackedCallback>& callback) {
  40   // Prevent null types for obvious reasons, but also ref-counted types to avoid
  41   // leaks on challenge failures (since they're only written to on success).
  42   if (!signed_data || !signed_data_signature || !platform_key_certificate ||
  43       VarTracker::IsVarTypeRefcounted(signed_data->type) ||
  44       VarTracker::IsVarTypeRefcounted(signed_data_signature->type) ||
  45       VarTracker::IsVarTypeRefcounted(platform_key_certificate->type)) {
  46     return PP_ERROR_BADARGUMENT;
  47   }
  48
  49   StringVar* service_id_str = StringVar::FromPPVar(service_id);
  50   if (!service_id_str)
  51     return PP_ERROR_BADARGUMENT;
  52
  53   scoped_refptr<ArrayBufferVar> challenge_buffer =
  54       ArrayBufferVar::FromPPVar(challenge);
  55   if (!challenge_buffer.get())
  56     return PP_ERROR_BADARGUMENT;
  57
  58   uint8_t* challenge_data = static_cast<uint8_t*>(challenge_buffer->Map());
  59   uint32 challenge_length = challenge_buffer->ByteLength();
  60   std::vector<uint8_t> challenge_vector(challenge_data,
  61                                         challenge_data + challenge_length);
  62   challenge_buffer->Unmap();
  63
  64   PpapiHostMsg_PlatformVerification_ChallengePlatform challenge_message(
  65       service_id_str->value(), challenge_vector);
  66
  67   ChallengePlatformParams output_params = {
  68       signed_data, signed_data_signature, platform_key_certificate, callback };
  69
  70   Call<PpapiHostMsg_PlatformVerification_ChallengePlatformReply>(
  71       BROWSER, challenge_message, base::Bind(
  72           &PlatformVerificationPrivateResource::OnChallengePlatformReply,
  73           base::Unretained(this), output_params));
  74   return PP_OK_COMPLETIONPENDING;
  75 }
  76
  77 void PlatformVerificationPrivateResource::OnChallengePlatformReply(
  78     ChallengePlatformParams output_params,
  79     const ResourceMessageReplyParams& params,
  80     const std::vector<uint8_t>& raw_signed_data,
  81     const std::vector<uint8_t>& raw_signed_data_signature,
  82     const std::string& raw_platform_key_certificate) {
  83   if (!TrackedCallback::IsPending(output_params.callback) ||
  84       TrackedCallback::IsScheduledToRun(output_params.callback)) {
  85     return;
  86   }
  87
  88   if (params.result() == PP_OK) {
  89     *(output_params.signed_data) =
  90         (PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferVar(
  91             raw_signed_data.size(), &raw_signed_data.front()))->GetPPVar();
  92     *(output_params.signed_data_signature) =
  93         (PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferVar(
  94             raw_signed_data_signature.size(),
  95             &raw_signed_data_signature.front()))->GetPPVar();
  96     *(output_params.platform_key_certificate) =
  97         (new StringVar(raw_platform_key_certificate))->GetPPVar();
  98   }
  99   output_params.callback->Run(params.result());
 100 }
 101
 102 }  // namespace proxy
 103 }  // namespace ppapi