Revert "Add ALTS C stack to gRPC core"

11 files changed, 0 insertions, 906 deletions

diff --git a/src/core/lib/security/credentials/alts/alts_credentials.cc b/src/core/lib/security/credentials/alts/alts_credentials.cc
deleted file mode 100644
index fa05d901bf..0000000000
--- a/src/core/lib/security/credentials/alts/alts_credentials.cc
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#include "src/core/lib/security/credentials/alts/alts_credentials.h"
-
-#include <cstring>
-
-#include <grpc/grpc.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-
-#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
-#include "src/core/lib/security/security_connector/alts_security_connector.h"
-
-#define GRPC_CREDENTIALS_TYPE_ALTS "Alts"
-#define GRPC_ALTS_HANDSHAKER_SERVICE_URL "metadata.google.internal:8080"
-
-static void alts_credentials_destruct(grpc_channel_credentials* creds) {
-  grpc_alts_credentials* alts_creds =
-      reinterpret_cast<grpc_alts_credentials*>(creds);
-  grpc_alts_credentials_options_destroy(alts_creds->options);
-  gpr_free(alts_creds->handshaker_service_url);
-}
-
-static void alts_server_credentials_destruct(grpc_server_credentials* creds) {
-  grpc_alts_server_credentials* alts_creds =
-      reinterpret_cast<grpc_alts_server_credentials*>(creds);
-  grpc_alts_credentials_options_destroy(alts_creds->options);
-  gpr_free(alts_creds->handshaker_service_url);
-}
-
-static grpc_security_status alts_create_security_connector(
-    grpc_channel_credentials* creds,
-    grpc_call_credentials* request_metadata_creds, const char* target_name,
-    const grpc_channel_args* args, grpc_channel_security_connector** sc,
-    grpc_channel_args** new_args) {
-  return grpc_alts_channel_security_connector_create(
-      creds, request_metadata_creds, target_name, sc);
-}
-
-static grpc_security_status alts_server_create_security_connector(
-    grpc_server_credentials* creds, grpc_server_security_connector** sc) {
-  return grpc_alts_server_security_connector_create(creds, sc);
-}
-
-static const grpc_channel_credentials_vtable alts_credentials_vtable = {
-    alts_credentials_destruct, alts_create_security_connector,
-    /*duplicate_without_call_credentials=*/nullptr};
-
-static const grpc_server_credentials_vtable alts_server_credentials_vtable = {
-    alts_server_credentials_destruct, alts_server_create_security_connector};
-
-grpc_channel_credentials* grpc_alts_credentials_create_customized(
-    const grpc_alts_credentials_options* options,
-    const char* handshaker_service_url, bool enable_untrusted_alts) {
-  if (!enable_untrusted_alts && !grpc_alts_is_running_on_gcp()) {
-    return nullptr;
-  }
-  auto creds = static_cast<grpc_alts_credentials*>(
-      gpr_zalloc(sizeof(grpc_alts_credentials)));
-  creds->options = grpc_alts_credentials_options_copy(options);
-  creds->handshaker_service_url =
-      handshaker_service_url == nullptr
-          ? gpr_strdup(GRPC_ALTS_HANDSHAKER_SERVICE_URL)
-          : gpr_strdup(handshaker_service_url);
-  creds->base.type = GRPC_CREDENTIALS_TYPE_ALTS;
-  creds->base.vtable = &alts_credentials_vtable;
-  gpr_ref_init(&creds->base.refcount, 1);
-  return &creds->base;
-}
-
-grpc_server_credentials* grpc_alts_server_credentials_create_customized(
-    const grpc_alts_credentials_options* options,
-    const char* handshaker_service_url, bool enable_untrusted_alts) {
-  if (!enable_untrusted_alts && !grpc_alts_is_running_on_gcp()) {
-    return nullptr;
-  }
-  auto creds = static_cast<grpc_alts_server_credentials*>(
-      gpr_zalloc(sizeof(grpc_alts_server_credentials)));
-  creds->options = grpc_alts_credentials_options_copy(options);
-  creds->handshaker_service_url =
-      handshaker_service_url == nullptr
-          ? gpr_strdup(GRPC_ALTS_HANDSHAKER_SERVICE_URL)
-          : gpr_strdup(handshaker_service_url);
-  creds->base.type = GRPC_CREDENTIALS_TYPE_ALTS;
-  creds->base.vtable = &alts_server_credentials_vtable;
-  gpr_ref_init(&creds->base.refcount, 1);
-  return &creds->base;
-}
-
-grpc_channel_credentials* grpc_alts_credentials_create(
-    const grpc_alts_credentials_options* options) {
-  return grpc_alts_credentials_create_customized(
-      options, GRPC_ALTS_HANDSHAKER_SERVICE_URL, false);
-}
-
-grpc_server_credentials* grpc_alts_server_credentials_create(
-    const grpc_alts_credentials_options* options) {
-  return grpc_alts_server_credentials_create_customized(
-      options, GRPC_ALTS_HANDSHAKER_SERVICE_URL, false);
-}
diff --git a/src/core/lib/security/credentials/alts/alts_credentials.h b/src/core/lib/security/credentials/alts/alts_credentials.h
deleted file mode 100644
index 621789cf65..0000000000
--- a/src/core/lib/security/credentials/alts/alts_credentials.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_ALTS_CREDENTIALS_H
-#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_ALTS_CREDENTIALS_H
-
-#include <grpc/support/port_platform.h>
-
-#include <grpc/grpc_security.h>
-
-#include "src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h"
-#include "src/core/lib/security/credentials/credentials.h"
-
-/* Main struct for grpc ALTS channel credential. */
-typedef struct grpc_alts_credentials {
-  grpc_channel_credentials base;
-  grpc_alts_credentials_options* options;
-  char* handshaker_service_url;
-} grpc_alts_credentials;
-
-/* Main struct for grpc ALTS server credential. */
-typedef struct grpc_alts_server_credentials {
-  grpc_server_credentials base;
-  grpc_alts_credentials_options* options;
-  char* handshaker_service_url;
-} grpc_alts_server_credentials;
-
-/**
- * This method creates an ALTS channel credential object.
- *
- * - options: grpc ALTS credentials options instance for client.
- *
- * It returns the created ALTS channel credential object.
- */
-grpc_channel_credentials* grpc_alts_credentials_create(
-    const grpc_alts_credentials_options* options);
-
-/**
- * This method creates an ALTS server credential object.
- *
- * - options: grpc ALTS credentials options instance for server.
- *
- * It returns the created ALTS server credential object.
- */
-grpc_server_credentials* grpc_alts_server_credentials_create(
-    const grpc_alts_credentials_options* options);
-
-/**
- * This method creates an ALTS channel credential object with customized
- * information provided by caller.
- *
- * - options: grpc ALTS credentials options instance for client.
- * - handshaker_service_url: address of ALTS handshaker service in the format of
- *   "host:port". If it's nullptr, the address of default metadata server will
- *   be used.
- * - enable_untrusted_alts: a boolean flag used to enable ALTS in untrusted
- *   mode. This mode can be enabled when we are sure ALTS is running on GCP or
- * for testing purpose.
- *
- * It returns nullptr if the flag is disabled AND ALTS is not running on GCP.
- * Otherwise, it returns the created credential object.
- */
-
-grpc_channel_credentials* grpc_alts_credentials_create_customized(
-    const grpc_alts_credentials_options* options,
-    const char* handshaker_service_url, bool enable_untrusted_alts);
-
-/**
- * This method creates an ALTS server credential object with customized
- * information provided by caller.
- *
- * - options: grpc ALTS credentials options instance for server.
- * - handshaker_service_url: address of ALTS handshaker service in the format of
- *   "host:port". If it's nullptr, the address of default metadata server will
- *   be used.
- * - enable_untrusted_alts: a boolean flag used to enable ALTS in untrusted
- *   mode. This mode can be enabled when we are sure ALTS is running on GCP or
- * for testing purpose.
- *
- * It returns nullptr if the flag is disabled and ALTS is not running on GCP.
- * Otherwise, it returns the created credential object.
- */
-grpc_server_credentials* grpc_alts_server_credentials_create_customized(
-    const grpc_alts_credentials_options* options,
-    const char* handshaker_service_url, bool enable_untrusted_alts);
-
-#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_ALTS_CREDENTIALS_H */
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment.cc b/src/core/lib/security/credentials/alts/check_gcp_environment.cc
deleted file mode 100644
index 96807876cf..0000000000
--- a/src/core/lib/security/credentials/alts/check_gcp_environment.cc
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
-
-#include <ctype.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-
-const size_t kBiosDataBufferSize = 256;
-
-static char* trim(const char* src) {
-  if (src == nullptr) {
-    return nullptr;
-  }
-  char* des = nullptr;
-  size_t start = 0, end = strlen(src) - 1;
-  /* find the last character that is not a whitespace. */
-  while (end != 0 && isspace(src[end])) {
-    end--;
-  }
-  /* find the first character that is not a whitespace. */
-  while (start < strlen(src) && isspace(src[start])) {
-    start++;
-  }
-  if (start <= end) {
-    des = static_cast<char*>(
-        gpr_zalloc(sizeof(char) * (end - start + 2 /* '\0' */)));
-    memcpy(des, src + start, end - start + 1);
-  }
-  return des;
-}
-
-namespace grpc_core {
-namespace internal {
-
-char* read_bios_file(const char* bios_file) {
-  FILE* fp = fopen(bios_file, "r");
-  if (!fp) {
-    gpr_log(GPR_ERROR, "BIOS data file cannot be opened.");
-    return nullptr;
-  }
-  char buf[kBiosDataBufferSize + 1];
-  size_t ret = fread(buf, sizeof(char), kBiosDataBufferSize, fp);
-  buf[ret] = '\0';
-  char* trimmed_buf = trim(buf);
-  fclose(fp);
-  return trimmed_buf;
-}
-
-}  // namespace internal
-}  // namespace grpc_core
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment.h b/src/core/lib/security/credentials/alts/check_gcp_environment.h
deleted file mode 100644
index aea4cea643..0000000000
--- a/src/core/lib/security/credentials/alts/check_gcp_environment.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_CHECK_GCP_ENVIRONMENT_H
-#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_CHECK_GCP_ENVIRONMENT_H
-
-namespace grpc_core {
-namespace internal {
-
-/**
- * This method is a helper function that reads a file containing system bios
- * data. Exposed for testing only.
- *
- * - bios_file: a file containing BIOS data used to determine GCE tenancy
- *   information.
- *
- * It returns a buffer containing the data read from the file.
- */
-char* read_bios_file(const char* bios_file);
-
-/**
- * This method checks if system BIOS data contains Google-specific phrases.
- * Exposed for testing only.
- *
- * - bios_data: a buffer containing system BIOS data.
- *
- * It returns true if the BIOS data contains Google-specific phrases, and false
- * otherwise.
- */
-bool check_bios_data(const char* bios_data);
-
-}  // namespace internal
-}  // namespace grpc_core
-
-/**
- * This method checks if a VM (Windows or Linux) is running within Google
- * compute Engine (GCE) or not. It returns true if the VM is running in GCE and
- * false otherwise.
- */
-bool grpc_alts_is_running_on_gcp();
-
-#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_CHECK_GCP_ENVIRONMENT_H */
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment_linux.cc b/src/core/lib/security/credentials/alts/check_gcp_environment_linux.cc
deleted file mode 100644
index 7c4d7a71cd..0000000000
--- a/src/core/lib/security/credentials/alts/check_gcp_environment_linux.cc
+++ /dev/null
@@ -1,67 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_LINUX
-
-#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/sync.h>
-
-#include <string.h>
-
-#define GRPC_ALTS_EXPECT_NAME_GOOGLE "Google"
-#define GRPC_ALTS_EXPECT_NAME_GCE "Google Compute Engine"
-#define GRPC_ALTS_PRODUCT_NAME_FILE "/sys/class/dmi/id/product_name"
-
-static bool g_compute_engine_detection_done = false;
-static bool g_is_on_compute_engine = false;
-static gpr_mu g_mu;
-static gpr_once g_once = GPR_ONCE_INIT;
-
-namespace grpc_core {
-namespace internal {
-
-bool check_bios_data(const char* bios_data_file) {
-  char* bios_data = read_bios_file(bios_data_file);
-  bool result = (!strcmp(bios_data, GRPC_ALTS_EXPECT_NAME_GOOGLE)) ||
-                (!strcmp(bios_data, GRPC_ALTS_EXPECT_NAME_GCE));
-  gpr_free(bios_data);
-  return result;
-}
-
-}  // namespace internal
-}  // namespace grpc_core
-
-static void init_mu(void) { gpr_mu_init(&g_mu); }
-
-bool grpc_alts_is_running_on_gcp() {
-  gpr_once_init(&g_once, init_mu);
-  gpr_mu_lock(&g_mu);
-  if (!g_compute_engine_detection_done) {
-    g_is_on_compute_engine =
-        grpc_core::internal::check_bios_data(GRPC_ALTS_PRODUCT_NAME_FILE);
-    g_compute_engine_detection_done = true;
-  }
-  gpr_mu_unlock(&g_mu);
-  return g_is_on_compute_engine;
-}
-
-#endif  // GPR_LINUX
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment_no_op.cc b/src/core/lib/security/credentials/alts/check_gcp_environment_no_op.cc
deleted file mode 100644
index d97681b86d..0000000000
--- a/src/core/lib/security/credentials/alts/check_gcp_environment_no_op.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#if !defined(GPR_LINUX) && !defined(GPR_WINDOWS)
-
-#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
-
-#include <grpc/support/log.h>
-
-bool grpc_alts_is_running_on_gcp() {
-  gpr_log(GPR_ERROR,
-          "Platforms other than Linux and Windows are not supported");
-  return false;
-}
-
-#endif  // !defined(LINUX) && !defined(GPR_WINDOWS)
diff --git a/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc b/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc
deleted file mode 100644
index 55efe0e9dd..0000000000
--- a/src/core/lib/security/credentials/alts/check_gcp_environment_windows.cc
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#ifdef GPR_WINDOWS
-
-#include "src/core/lib/security/credentials/alts/check_gcp_environment.h"
-
-#include <shellapi.h>
-#include <stdio.h>
-#include <tchar.h>
-#include <windows.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/sync.h>
-
-#define GRPC_ALTS_EXPECT_NAME_GOOGLE "Google"
-#define GRPC_ALTS_WINDOWS_CHECK_COMMAND "powershell.exe"
-#define GRPC_ALTS_WINDOWS_CHECK_COMMAND_ARGS \
-  "(Get-WmiObject -Class Win32_BIOS).Manufacturer"
-#define GRPC_ALTS_WINDOWS_CHECK_BIOS_FILE "windows_bios.data"
-
-const size_t kBiosDataBufferSize = 256;
-
-static bool g_compute_engine_detection_done = false;
-static bool g_is_on_compute_engine = false;
-static gpr_mu g_mu;
-static gpr_once g_once = GPR_ONCE_INIT;
-
-namespace grpc_core {
-namespace internal {
-
-bool check_bios_data(const char* bios_data_file) {
-  char* bios_data = read_bios_file(bios_data_file);
-  bool result = !strcmp(bios_data, GRPC_ALTS_EXPECT_NAME_GOOGLE);
-  remove(GRPC_ALTS_WINDOWS_CHECK_BIOS_FILE);
-  gpr_free(bios_data);
-  return result;
-}
-
-}  // namespace internal
-}  // namespace grpc_core
-
-static void init_mu(void) { gpr_mu_init(&g_mu); }
-
-static bool run_powershell() {
-  SECURITY_ATTRIBUTES sa;
-  sa.nLength = sizeof(sa);
-  sa.lpSecurityDescriptor = NULL;
-  sa.bInheritHandle = TRUE;
-  HANDLE h = CreateFile(_T(GRPC_ALTS_WINDOWS_CHECK_BIOS_FILE), GENERIC_WRITE,
-                        FILE_SHARE_WRITE | FILE_SHARE_READ, &sa, OPEN_ALWAYS,
-                        FILE_ATTRIBUTE_NORMAL, NULL);
-  if (h == INVALID_HANDLE_VALUE) {
-    gpr_log(GPR_ERROR, "CreateFile failed (%d).", GetLastError());
-    return false;
-  }
-  PROCESS_INFORMATION pi;
-  STARTUPINFO si;
-  DWORD flags = CREATE_NO_WINDOW;
-  ZeroMemory(&pi, sizeof(pi));
-  ZeroMemory(&si, sizeof(si));
-  si.cb = sizeof(si);
-  si.dwFlags |= STARTF_USESTDHANDLES;
-  si.hStdInput = NULL;
-  si.hStdError = h;
-  si.hStdOutput = h;
-  TCHAR cmd[kBiosDataBufferSize];
-  _sntprintf(cmd, kBiosDataBufferSize, _T("%s %s"),
-             _T(GRPC_ALTS_WINDOWS_CHECK_COMMAND),
-             _T(GRPC_ALTS_WINDOWS_CHECK_COMMAND_ARGS));
-  if (!CreateProcess(NULL, cmd, NULL, NULL, TRUE, flags, NULL, NULL, &si,
-                     &pi)) {
-    gpr_log(GPR_ERROR, "CreateProcess failed (%d).\n", GetLastError());
-    return false;
-  }
-  WaitForSingleObject(pi.hProcess, INFINITE);
-  CloseHandle(pi.hProcess);
-  CloseHandle(pi.hThread);
-  CloseHandle(h);
-  return true;
-}
-
-bool grpc_alts_is_running_on_gcp() {
-  gpr_once_init(&g_once, init_mu);
-  gpr_mu_lock(&g_mu);
-  if (!g_compute_engine_detection_done) {
-    g_is_on_compute_engine =
-        run_powershell() &&
-        grpc_core::internal::check_bios_data(GRPC_ALTS_WINDOWS_CHECK_BIOS_FILE);
-    g_compute_engine_detection_done = true;
-  }
-  gpr_mu_unlock(&g_mu);
-  return g_is_on_compute_engine;
-}
-
-#endif  // GPR_WINDOWS
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc b/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc
deleted file mode 100644
index 7d54e8346f..0000000000
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_client_options.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#include <stdlib.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include <grpc/support/string_util.h>
-
-#include "src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h"
-#include "src/core/tsi/alts/handshaker/transport_security_common_api.h"
-
-static grpc_alts_credentials_options* alts_client_options_copy(
-    const grpc_alts_credentials_options* options);
-
-static void alts_client_options_destroy(grpc_alts_credentials_options* options);
-
-static target_service_account* target_service_account_create(
-    const char* service_account) {
-  if (service_account == nullptr) {
-    return nullptr;
-  }
-  auto* sa = static_cast<target_service_account*>(
-      gpr_zalloc(sizeof(target_service_account)));
-  sa->data = gpr_strdup(service_account);
-  return sa;
-}
-
-bool grpc_alts_credentials_client_options_add_target_service_account(
-    grpc_alts_credentials_client_options* options,
-    const char* service_account) {
-  if (options == nullptr || service_account == nullptr) {
-    gpr_log(
-        GPR_ERROR,
-        "Invalid nullptr arguments to "
-        "grpc_alts_credentials_client_options_add_target_service_account()");
-    return false;
-  }
-  target_service_account* node = target_service_account_create(service_account);
-  node->next = options->target_account_list_head;
-  options->target_account_list_head = node;
-  return true;
-}
-
-static void target_service_account_destroy(
-    target_service_account* service_account) {
-  if (service_account == nullptr) {
-    return;
-  }
-  gpr_free(service_account->data);
-  gpr_free(service_account);
-}
-
-static const grpc_alts_credentials_options_vtable vtable = {
-    alts_client_options_copy, alts_client_options_destroy};
-
-grpc_alts_credentials_options* grpc_alts_credentials_client_options_create() {
-  auto client_options = static_cast<grpc_alts_credentials_client_options*>(
-      gpr_zalloc(sizeof(grpc_alts_credentials_client_options)));
-  client_options->base.vtable = &vtable;
-  return &client_options->base;
-}
-
-static grpc_alts_credentials_options* alts_client_options_copy(
-    const grpc_alts_credentials_options* options) {
-  if (options == nullptr) {
-    return nullptr;
-  }
-  grpc_alts_credentials_options* new_options =
-      grpc_alts_credentials_client_options_create();
-  auto new_client_options =
-      reinterpret_cast<grpc_alts_credentials_client_options*>(new_options);
-  /* Copy target service accounts. */
-  target_service_account* prev = nullptr;
-  auto node =
-      (reinterpret_cast<const grpc_alts_credentials_client_options*>(options))
-          ->target_account_list_head;
-  while (node != nullptr) {
-    target_service_account* new_node =
-        target_service_account_create(node->data);
-    if (prev == nullptr) {
-      new_client_options->target_account_list_head = new_node;
-    } else {
-      prev->next = new_node;
-    }
-    prev = new_node;
-    node = node->next;
-  }
-  /* Copy rpc protocol versions. */
-  grpc_gcp_rpc_protocol_versions_copy(&options->rpc_versions,
-                                      &new_options->rpc_versions);
-  return new_options;
-}
-
-static void alts_client_options_destroy(
-    grpc_alts_credentials_options* options) {
-  if (options == nullptr) {
-    return;
-  }
-  auto* client_options =
-      reinterpret_cast<grpc_alts_credentials_client_options*>(options);
-  target_service_account* node = client_options->target_account_list_head;
-  while (node != nullptr) {
-    target_service_account* next_node = node->next;
-    target_service_account_destroy(node);
-    node = next_node;
-  }
-}
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.cc b/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.cc
deleted file mode 100644
index d428171540..0000000000
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#include "src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h"
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-
-grpc_alts_credentials_options* grpc_alts_credentials_options_copy(
-    const grpc_alts_credentials_options* options) {
-  if (options != nullptr && options->vtable != nullptr &&
-      options->vtable->copy != nullptr) {
-    return options->vtable->copy(options);
-  }
-  /* An error occurred. */
-  gpr_log(GPR_ERROR,
-          "Invalid arguments to grpc_alts_credentials_options_copy()");
-  return nullptr;
-}
-
-void grpc_alts_credentials_options_destroy(
-    grpc_alts_credentials_options* options) {
-  if (options != nullptr) {
-    if (options->vtable != nullptr && options->vtable->destruct != nullptr) {
-      options->vtable->destruct(options);
-    }
-    gpr_free(options);
-  }
-}
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h b/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h
deleted file mode 100644
index 4e46d9f2de..0000000000
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_GRPC_ALTS_CREDENTIALS_OPTIONS_H
-#define GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_GRPC_ALTS_CREDENTIALS_OPTIONS_H
-
-#include <grpc/support/port_platform.h>
-
-#include <stdbool.h>
-
-#include "src/core/tsi/alts/handshaker/transport_security_common_api.h"
-
-/**
- * Main interface for ALTS credentials options. The options will contain
- * information that will be passed from grpc to TSI layer such as RPC protocol
- * versions. ALTS client (channel) and server credentials will have their own
- * implementation of this interface. The APIs listed in this header are
- * thread-compatible.
- */
-typedef struct grpc_alts_credentials_options grpc_alts_credentials_options;
-
-/* V-table for grpc_alts_credentials_options */
-typedef struct grpc_alts_credentials_options_vtable {
-  grpc_alts_credentials_options* (*copy)(
-      const grpc_alts_credentials_options* options);
-  void (*destruct)(grpc_alts_credentials_options* options);
-} grpc_alts_credentials_options_vtable;
-
-struct grpc_alts_credentials_options {
-  const struct grpc_alts_credentials_options_vtable* vtable;
-  grpc_gcp_rpc_protocol_versions rpc_versions;
-};
-
-typedef struct target_service_account {
-  struct target_service_account* next;
-  char* data;
-} target_service_account;
-
-/**
- * Main struct for ALTS client credentials options. The options contain a
- * a list of target service accounts (if specified) used for secure naming
- * check.
- */
-typedef struct grpc_alts_credentials_client_options {
-  grpc_alts_credentials_options base;
-  target_service_account* target_account_list_head;
-} grpc_alts_credentials_client_options;
-
-/**
- * Main struct for ALTS server credentials options. The options currently
- * do not contain any server-specific fields.
- */
-typedef struct grpc_alts_credentials_server_options {
-  grpc_alts_credentials_options base;
-} grpc_alts_credentials_server_options;
-
-/**
- * This method performs a deep copy on grpc_alts_credentials_options instance.
- *
- * - options: a grpc_alts_credentials_options instance that needs to be copied.
- *
- * It returns a new grpc_alts_credentials_options instance on success and NULL
- * on failure.
- */
-grpc_alts_credentials_options* grpc_alts_credentials_options_copy(
-    const grpc_alts_credentials_options* options);
-
-/**
- * This method destroys a grpc_alts_credentials_options instance by
- * de-allocating all of its occupied memory.
- *
- * - options: a grpc_alts_credentials_options instance that needs to be
- *   destroyed.
- */
-void grpc_alts_credentials_options_destroy(
-    grpc_alts_credentials_options* options);
-
-/* This method creates a grpc ALTS credentials client options instance. */
-grpc_alts_credentials_options* grpc_alts_credentials_client_options_create();
-
-/* This method creates a grpc ALTS credentials server options instance. */
-grpc_alts_credentials_options* grpc_alts_credentials_server_options_create();
-
-/**
- * This method adds a target service account to grpc ALTS credentials client
- * options instance.
- *
- * - options: grpc ALTS credentials client options instance.
- * - service_account: service account of target endpoint.
- *
- * It returns true on success and false on failure.
- */
-bool grpc_alts_credentials_client_options_add_target_service_account(
-    grpc_alts_credentials_client_options* options, const char* service_account);
-
-#endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_ALTS_GRPC_ALTS_CREDENTIALS_OPTIONS_H \
-        */
diff --git a/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc b/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc
deleted file mode 100644
index 62aa7a620a..0000000000
--- a/src/core/lib/security/credentials/alts/grpc_alts_credentials_server_options.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- *
- * Copyright 2018 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/support/port_platform.h>
-
-#include <stdlib.h>
-#include <string.h>
-
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-
-#include "src/core/lib/security/credentials/alts/grpc_alts_credentials_options.h"
-#include "src/core/tsi/alts/handshaker/transport_security_common_api.h"
-
-static grpc_alts_credentials_options* alts_server_options_copy(
-    const grpc_alts_credentials_options* options);
-
-static void alts_server_options_destroy(
-    grpc_alts_credentials_options* options) {}
-
-static const grpc_alts_credentials_options_vtable vtable = {
-    alts_server_options_copy, alts_server_options_destroy};
-
-grpc_alts_credentials_options* grpc_alts_credentials_server_options_create() {
-  grpc_alts_credentials_server_options* server_options =
-      static_cast<grpc_alts_credentials_server_options*>(
-          gpr_zalloc(sizeof(*server_options)));
-  server_options->base.vtable = &vtable;
-  return &server_options->base;
-}
-
-static grpc_alts_credentials_options* alts_server_options_copy(
-    const grpc_alts_credentials_options* options) {
-  if (options == nullptr) {
-    return nullptr;
-  }
-  grpc_alts_credentials_options* new_options =
-      grpc_alts_credentials_server_options_create();
-  /* Copy rpc protocol versions. */
-  grpc_gcp_rpc_protocol_versions_copy(&options->rpc_versions,
-                                      &new_options->rpc_versions);
-  return new_options;
-}