Move fscrypt_init_extensions into system/core

Bug: 140027478
Test: treehugger
Change-Id: I296ce6d1272816c237e1ad213fbdef9f6fafb44f

3 files changed, 0 insertions, 228 deletions

diff --git a/libfscrypt/Android.bp b/libfscrypt/Android.bp
index cca38235..65b94ed9 100644
--- a/libfscrypt/Android.bp
+++ b/libfscrypt/Android.bp
@@ -5,7 +5,6 @@ cc_library {
     recovery_available: true,
     srcs: [
         "fscrypt.cpp",
-        "fscrypt_init_extensions.cpp",
     ],
     export_include_dirs: ["include"],
     shared_libs: [
diff --git a/libfscrypt/fscrypt_init_extensions.cpp b/libfscrypt/fscrypt_init_extensions.cpp
deleted file mode 100644
index 964ead65..00000000
--- a/libfscrypt/fscrypt_init_extensions.cpp
+++ /dev/null
@@ -1,194 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * 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 "fscrypt/fscrypt_init_extensions.h"
-
-#include <android-base/file.h>
-#include <android-base/logging.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-#include <cutils/properties.h>
-#include <cutils/sockets.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fts.h>
-#include <keyutils.h>
-#include <logwrap/logwrap.h>
-#include <sys/mount.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-#include "fscrypt/fscrypt.h"
-
-#define TAG "fscrypt"
-
-static int set_system_de_policy_on(char const* dir);
-
-int fscrypt_install_keyring()
-{
-    key_serial_t device_keyring = add_key("keyring", "fscrypt", 0, 0,
-                                          KEY_SPEC_SESSION_KEYRING);
-
-    if (device_keyring == -1) {
-        PLOG(ERROR) << "Failed to create keyring";
-        return -1;
-    }
-
-    LOG(INFO) << "Keyring created with id " << device_keyring << " in process " << getpid();
-
-    return 0;
-}
-
-// TODO(b/139378601): use a single central implementation of this.
-static void delete_dir_contents(const char* dir) {
-    char* const paths[2] = {const_cast<char*>(dir), nullptr};
-    FTS* fts = fts_open(paths, FTS_PHYSICAL | FTS_NOCHDIR | FTS_XDEV, nullptr);
-    FTSENT* cur;
-    while ((cur = fts_read(fts)) != nullptr) {
-        if (cur->fts_info == FTS_ERR) {
-            PLOG(ERROR) << "fts_read";
-            break;
-        }
-        if (strcmp(dir, cur->fts_path) == 0) {
-            continue;
-        }
-        switch (cur->fts_info) {
-            case FTS_D:
-                break;  // Ignore these
-            case FTS_DP:
-                if (rmdir(cur->fts_path) == -1) {
-                    PLOG(ERROR) << "rmdir " << cur->fts_path;
-                }
-                break;
-            default:
-                PLOG(ERROR) << "FTS unexpected type " << cur->fts_info << " at " << cur->fts_path;
-                if (rmdir(cur->fts_path) != -1) break;
-                // FALLTHRU (for gcc, lint, pcc, etc; and following for clang)
-                FALLTHROUGH_INTENDED;
-            case FTS_F:
-            case FTS_SL:
-            case FTS_SLNONE:
-                if (unlink(cur->fts_path) == -1) {
-                    PLOG(ERROR) << "unlink " << cur->fts_path;
-                }
-                break;
-        }
-    }
-
-    if (fts_close(fts) != 0) {
-        PLOG(ERROR) << "fts_close";
-    }
-}
-
-int fscrypt_set_directory_policy(const char* dir)
-{
-    const std::string prefix = "/data/";
-
-    if (!dir || strncmp(dir, prefix.c_str(), prefix.size())) {
-        return 0;
-    }
-
-    // Special-case /data/media/obb per b/64566063
-    if (strcmp(dir, "/data/media/obb") == 0) {
-        // Try to set policy on this directory, but if it is non-empty this may fail.
-        set_system_de_policy_on(dir);
-        return 0;
-    }
-
-    // Only set policy on first level /data directories
-    // To make this less restrictive, consider using a policy file.
-    // However this is overkill for as long as the policy is simply
-    // to apply a global policy to all /data folders created via makedir
-    if (strchr(dir + prefix.size(), '/')) {
-        return 0;
-    }
-
-    // Special case various directories that must not be encrypted,
-    // often because their subdirectories must be encrypted.
-    // This isn't a nice way to do this, see b/26641735
-    std::vector<std::string> directories_to_exclude = {
-        "lost+found",
-        "system_ce", "system_de",
-        "misc_ce", "misc_de",
-        "vendor_ce", "vendor_de",
-        "media",
-        "data", "user", "user_de",
-        "apex", "preloads", "app-staging",
-        "gsi",
-    };
-    for (const auto& d: directories_to_exclude) {
-        if ((prefix + d) == dir) {
-            LOG(INFO) << "Not setting policy on " << dir;
-            return 0;
-        }
-    }
-    int err = set_system_de_policy_on(dir);
-    if (err == 0) {
-        return 0;
-    }
-    // Empty these directories if policy setting fails.
-    std::vector<std::string> wipe_on_failure = {
-        "rollback", "rollback-observer",  // b/139193659
-    };
-    for (const auto& d : wipe_on_failure) {
-        if ((prefix + d) == dir) {
-            LOG(ERROR) << "Setting policy failed, deleting: " << dir;
-            delete_dir_contents(dir);
-            err = set_system_de_policy_on(dir);
-            break;
-        }
-    }
-    return err;
-}
-
-static int set_system_de_policy_on(char const* dir) {
-    std::string ref_filename = std::string("/data") + fscrypt_key_ref;
-    std::string policy;
-    if (!android::base::ReadFileToString(ref_filename, &policy)) {
-        LOG(ERROR) << "Unable to read system policy to set on " << dir;
-        return -1;
-    }
-
-    auto type_filename = std::string("/data") + fscrypt_key_mode;
-    std::string modestring;
-    if (!android::base::ReadFileToString(type_filename, &modestring)) {
-        LOG(ERROR) << "Cannot read mode";
-    }
-
-    std::vector<std::string> modes = android::base::Split(modestring, ":");
-
-    if (modes.size() < 1 || modes.size() > 2) {
-        LOG(ERROR) << "Invalid encryption mode string: " << modestring;
-        return -1;
-    }
-
-    LOG(INFO) << "Setting policy on " << dir;
-    int result = fscrypt_policy_ensure(dir, policy.c_str(), policy.length(),
-                                       modes[0].c_str(),
-                                       modes.size() >= 2 ?
-                                            modes[1].c_str() : "aes-256-cts");
-    if (result) {
-        LOG(ERROR) << android::base::StringPrintf(
-            "Setting %02x%02x%02x%02x policy on %s failed!",
-            policy[0], policy[1], policy[2], policy[3], dir);
-        return -1;
-    }
-
-    return 0;
-}
diff --git a/libfscrypt/include/fscrypt/fscrypt_init_extensions.h b/libfscrypt/include/fscrypt/fscrypt_init_extensions.h
deleted file mode 100644
index 2b6c46e1..00000000
--- a/libfscrypt/include/fscrypt/fscrypt_init_extensions.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * 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 _FSCRYPT_INIT_EXTENSIONS_H_
-#define _FSCRYPT_INIT_EXTENSIONS_H_
-
-#include <sys/cdefs.h>
-#include <stdbool.h>
-#include <cutils/multiuser.h>
-
-__BEGIN_DECLS
-
-// These functions assume they are being called from init
-// They will not operate properly outside of init
-int fscrypt_install_keyring();
-int fscrypt_set_directory_policy(const char* path);
-
-__END_DECLS
-
-#endif // _FSCRYPT_INIT_EXTENSIONS_H_