| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "bin/tls_socket.h" |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <nss.h> |
| #include <prerror.h> |
| #include <prinit.h> |
| #include <prnetdb.h> |
| #include <ssl.h> |
| |
| #include "bin/builtin.h" |
| #include "bin/dartutils.h" |
| #include "bin/net/nss_memio.h" |
| #include "bin/thread.h" |
| #include "bin/utils.h" |
| #include "platform/utils.h" |
| |
| #include "include/dart_api.h" |
| |
| bool TlsFilter::library_initialized_ = false; |
| dart::Mutex TlsFilter::mutex_; // To protect library initialization. |
| static const int kTlsFilterNativeFieldIndex = 0; |
| |
| static TlsFilter* GetTlsFilter(Dart_NativeArguments args) { |
| TlsFilter* filter; |
| Dart_Handle dart_this = ThrowIfError(Dart_GetNativeArgument(args, 0)); |
| ASSERT(Dart_IsInstance(dart_this)); |
| ThrowIfError(Dart_GetNativeInstanceField( |
| dart_this, |
| kTlsFilterNativeFieldIndex, |
| reinterpret_cast<intptr_t*>(&filter))); |
| return filter; |
| } |
| |
| |
| static void SetTlsFilter(Dart_NativeArguments args, TlsFilter* filter) { |
| Dart_Handle dart_this = ThrowIfError(Dart_GetNativeArgument(args, 0)); |
| ASSERT(Dart_IsInstance(dart_this)); |
| ThrowIfError(Dart_SetNativeInstanceField( |
| dart_this, |
| kTlsFilterNativeFieldIndex, |
| reinterpret_cast<intptr_t>(filter))); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_Init)(Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| Dart_Handle dart_this = ThrowIfError(Dart_GetNativeArgument(args, 0)); |
| TlsFilter* filter = new TlsFilter; |
| SetTlsFilter(args, filter); |
| filter->Init(dart_this); |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_Connect)(Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| Dart_Handle host_name = ThrowIfError(Dart_GetNativeArgument(args, 1)); |
| Dart_Handle port_object = ThrowIfError(Dart_GetNativeArgument(args, 2)); |
| |
| const char* host_name_string = NULL; |
| // TODO(whesse): Is truncating a Dart string containing \0 what we want? |
| ThrowIfError(Dart_StringToCString(host_name, &host_name_string)); |
| |
| int64_t port; |
| if (!DartUtils::GetInt64Value(port_object, &port) || |
| port < 0 || port > 65535) { |
| Dart_ThrowException(DartUtils::NewDartArgumentError( |
| "Illegal port parameter in TlsSocket")); |
| } |
| |
| GetTlsFilter(args)->Connect(host_name_string, static_cast<int>(port)); |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_Destroy)(Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| TlsFilter* filter = GetTlsFilter(args); |
| SetTlsFilter(args, NULL); |
| filter->Destroy(); |
| delete filter; |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_Handshake)(Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| GetTlsFilter(args)->Handshake(); |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_RegisterHandshakeCompleteCallback)( |
| Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| Dart_Handle handshake_complete = |
| ThrowIfError(Dart_GetNativeArgument(args, 1)); |
| if (!Dart_IsClosure(handshake_complete)) { |
| Dart_ThrowException(DartUtils::NewDartArgumentError( |
| "Illegal argument to RegisterHandshakeCompleteCallback")); |
| } |
| GetTlsFilter(args)->RegisterHandshakeCompleteCallback(handshake_complete); |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_ProcessBuffer)(Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| Dart_Handle buffer_id_object = ThrowIfError(Dart_GetNativeArgument(args, 1)); |
| int64_t buffer_id = DartUtils::GetIntegerValue(buffer_id_object); |
| if (buffer_id < 0 || buffer_id >= TlsFilter::kNumBuffers) { |
| Dart_ThrowException(DartUtils::NewDartArgumentError( |
| "Illegal argument to ProcessBuffer")); |
| } |
| |
| intptr_t bytes_read = |
| GetTlsFilter(args)->ProcessBuffer(static_cast<int>(buffer_id)); |
| Dart_SetReturnValue(args, Dart_NewInteger(bytes_read)); |
| Dart_ExitScope(); |
| } |
| |
| |
| void FUNCTION_NAME(TlsSocket_SetCertificateDatabase) |
| (Dart_NativeArguments args) { |
| Dart_EnterScope(); |
| Dart_Handle dart_pkcert_dir = ThrowIfError(Dart_GetNativeArgument(args, 0)); |
| // Check that the type is string, and get the UTF-8 C string value from it. |
| if (Dart_IsString(dart_pkcert_dir)) { |
| const char* pkcert_dir = NULL; |
| ThrowIfError(Dart_StringToCString(dart_pkcert_dir, &pkcert_dir)); |
| TlsFilter::InitializeLibrary(pkcert_dir); |
| } else { |
| Dart_ThrowException(DartUtils::NewDartArgumentError( |
| "Non-String argument to SetCertificateDatabase")); |
| } |
| Dart_ExitScope(); |
| } |
| |
| |
| void TlsFilter::Init(Dart_Handle dart_this) { |
| string_start_ = ThrowIfError( |
| Dart_NewPersistentHandle(DartUtils::NewString("start"))); |
| string_length_ = ThrowIfError( |
| Dart_NewPersistentHandle(DartUtils::NewString("length"))); |
| |
| InitializeBuffers(dart_this); |
| memio_ = memio_CreateIOLayer(kMemioBufferSize); |
| } |
| |
| |
| void TlsFilter::InitializeBuffers(Dart_Handle dart_this) { |
| // Create TlsFilter buffers as ExternalUint8Array objects. |
| Dart_Handle dart_buffers_object = ThrowIfError( |
| Dart_GetField(dart_this, DartUtils::NewString("buffers"))); |
| Dart_Handle dart_buffer_object = |
| Dart_ListGetAt(dart_buffers_object, kReadPlaintext); |
| Dart_Handle tls_external_buffer_class = |
| Dart_InstanceGetClass(dart_buffer_object); |
| Dart_Handle dart_buffer_size = ThrowIfError( |
| Dart_GetField(tls_external_buffer_class, DartUtils::NewString("SIZE"))); |
| buffer_size_ = DartUtils::GetIntegerValue(dart_buffer_size); |
| if (buffer_size_ <= 0 || buffer_size_ > 1024 * 1024) { |
| Dart_ThrowException( |
| DartUtils::NewString("Invalid buffer size in _TlsExternalBuffer")); |
| } |
| |
| Dart_Handle data_identifier = DartUtils::NewString("data"); |
| for (int i = 0; i < kNumBuffers; ++i) { |
| dart_buffer_objects_[i] = ThrowIfError( |
| Dart_NewPersistentHandle(Dart_ListGetAt(dart_buffers_object, i))); |
| buffers_[i] = new uint8_t[buffer_size_]; |
| Dart_Handle data = ThrowIfError( |
| Dart_NewExternalByteArray(buffers_[i], buffer_size_, NULL, NULL)); |
| ThrowIfError(Dart_SetField(dart_buffer_objects_[i], |
| data_identifier, |
| data)); |
| } |
| } |
| |
| |
| void TlsFilter::RegisterHandshakeCompleteCallback(Dart_Handle complete) { |
| ASSERT(NULL == handshake_complete_); |
| handshake_complete_ = ThrowIfError(Dart_NewPersistentHandle(complete)); |
| } |
| |
| |
| void TlsFilter::InitializeLibrary(const char* pkcert_database) { |
| MutexLocker locker(&mutex_); |
| if (!library_initialized_) { |
| PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); |
| // TODO(whesse): Verify there are no UTF-8 issues here. |
| SECStatus status = NSS_Init(pkcert_database); |
| if (status != SECSuccess) { |
| ThrowPRException("Unsuccessful NSS_Init call."); |
| } |
| |
| status = NSS_SetDomesticPolicy(); |
| if (status != SECSuccess) { |
| ThrowPRException("Unsuccessful NSS_SetDomesticPolicy call."); |
| } |
| } else { |
| ThrowException("Called TlsFilter::InitializeLibrary more than once"); |
| } |
| } |
| |
| |
| void TlsFilter::Connect(const char* host, int port) { |
| if (in_handshake_) { |
| ThrowException("Connect called while already in handshake state."); |
| } |
| PRFileDesc* my_socket = memio_; |
| |
| my_socket = SSL_ImportFD(NULL, my_socket); |
| if (my_socket == NULL) { |
| ThrowPRException("Unsuccessful SSL_ImportFD call"); |
| } |
| |
| if (SSL_SetURL(my_socket, host) == -1) { |
| ThrowPRException("Unsuccessful SetURL call"); |
| } |
| |
| SECStatus status = SSL_ResetHandshake(my_socket, PR_FALSE); |
| if (status != SECSuccess) { |
| ThrowPRException("Unsuccessful SSL_ResetHandshake call"); |
| } |
| |
| // SetPeerAddress |
| PRNetAddr host_address; |
| char host_entry_buffer[PR_NETDB_BUF_SIZE]; |
| PRHostEnt host_entry; |
| PRStatus rv = PR_GetHostByName(host, host_entry_buffer, |
| PR_NETDB_BUF_SIZE, &host_entry); |
| if (rv != PR_SUCCESS) { |
| ThrowPRException("Unsuccessful PR_GetHostByName call"); |
| } |
| |
| int index = PR_EnumerateHostEnt(0, &host_entry, port, &host_address); |
| if (index == -1 || index == 0) { |
| ThrowPRException("Unsuccessful PR_EnumerateHostEnt call"); |
| } |
| |
| memio_SetPeerName(my_socket, &host_address); |
| memio_ = my_socket; |
| } |
| |
| |
| void TlsFilter::Handshake() { |
| SECStatus status = SSL_ForceHandshake(memio_); |
| if (status == SECSuccess) { |
| if (in_handshake_) { |
| ThrowIfError(Dart_InvokeClosure(handshake_complete_, 0, NULL)); |
| in_handshake_ = false; |
| } |
| } else { |
| PRErrorCode error = PR_GetError(); |
| if (error == PR_WOULD_BLOCK_ERROR) { |
| if (!in_handshake_) { |
| in_handshake_ = true; |
| } |
| } else { |
| ThrowPRException("Unexpected handshake error"); |
| } |
| } |
| } |
| |
| |
| void TlsFilter::Destroy() { |
| for (int i = 0; i < kNumBuffers; ++i) { |
| Dart_DeletePersistentHandle(dart_buffer_objects_[i]); |
| delete[] buffers_[i]; |
| } |
| Dart_DeletePersistentHandle(string_start_); |
| Dart_DeletePersistentHandle(string_length_); |
| Dart_DeletePersistentHandle(handshake_complete_); |
| // TODO(whesse): Free NSS objects here. |
| } |
| |
| |
| intptr_t TlsFilter::ProcessBuffer(int buffer_index) { |
| Dart_Handle buffer_object = dart_buffer_objects_[buffer_index]; |
| Dart_Handle start_object = ThrowIfError( |
| Dart_GetField(buffer_object, string_start_)); |
| Dart_Handle length_object = ThrowIfError( |
| Dart_GetField(buffer_object, string_length_)); |
| int64_t unsafe_start = DartUtils::GetIntegerValue(start_object); |
| int64_t unsafe_length = DartUtils::GetIntegerValue(length_object); |
| ASSERT(unsafe_start >= 0); |
| ASSERT(unsafe_start < buffer_size_); |
| ASSERT(unsafe_length >= 0); |
| ASSERT(unsafe_length <= buffer_size_); |
| intptr_t start = static_cast<intptr_t>(unsafe_start); |
| intptr_t length = static_cast<intptr_t>(unsafe_length); |
| uint8_t* buffer = buffers_[buffer_index]; |
| |
| int bytes_processed = 0; |
| switch (buffer_index) { |
| case kReadPlaintext: { |
| int bytes_free = buffer_size_ - start - length; |
| bytes_processed = PR_Read(memio_, |
| buffer + start + length, |
| bytes_free); |
| if (bytes_processed < 0) { |
| ASSERT(bytes_processed == -1); |
| // TODO(whesse): Handle unexpected errors here. |
| PRErrorCode pr_error = PR_GetError(); |
| if (PR_WOULD_BLOCK_ERROR != pr_error) { |
| ThrowPRException("Error reading plaintext from TlsFilter"); |
| } |
| bytes_processed = 0; |
| } |
| break; |
| } |
| |
| case kWriteEncrypted: { |
| const uint8_t* buf1; |
| const uint8_t* buf2; |
| unsigned int len1; |
| unsigned int len2; |
| int bytes_free = buffer_size_ - start - length; |
| memio_Private* secret = memio_GetSecret(memio_); |
| memio_GetWriteParams(secret, &buf1, &len1, &buf2, &len2); |
| int bytes_to_send = |
| dart::Utils::Minimum(len1, static_cast<unsigned>(bytes_free)); |
| if (bytes_to_send > 0) { |
| memmove(buffer + start + length, buf1, bytes_to_send); |
| bytes_processed = bytes_to_send; |
| } |
| bytes_to_send = dart::Utils::Minimum(len2, |
| static_cast<unsigned>(bytes_free - bytes_processed)); |
| if (bytes_to_send > 0) { |
| memmove(buffer + start + length + bytes_processed, buf2, |
| bytes_to_send); |
| bytes_processed += bytes_to_send; |
| } |
| if (bytes_processed > 0) { |
| memio_PutWriteResult(secret, bytes_processed); |
| } |
| break; |
| } |
| |
| case kReadEncrypted: { |
| if (length > 0) { |
| bytes_processed = length; |
| memio_Private* secret = memio_GetSecret(memio_); |
| uint8_t* memio_buf; |
| int free_bytes = memio_GetReadParams(secret, &memio_buf); |
| if (free_bytes < bytes_processed) bytes_processed = free_bytes; |
| memmove(memio_buf, |
| buffer + start, |
| bytes_processed); |
| memio_PutReadResult(secret, bytes_processed); |
| } |
| break; |
| } |
| |
| case kWritePlaintext: { |
| if (length > 0) { |
| bytes_processed = PR_Write(memio_, |
| buffer + start, |
| length); |
| } |
| |
| if (bytes_processed < 0) { |
| ASSERT(bytes_processed == -1); |
| // TODO(whesse): Handle unexpected errors here. |
| PRErrorCode pr_error = PR_GetError(); |
| if (PR_WOULD_BLOCK_ERROR != pr_error) { |
| ThrowPRException("Error reading plaintext from TlsFilter"); |
| } |
| bytes_processed = 0; |
| } |
| break; |
| } |
| } |
| return bytes_processed; |
| } |