diff --git a/include/private/android_filesystem_capability.h b/include/private/android_filesystem_capability.h new file mode 100644 index 0000000..0505cda --- /dev/null +++ b/include/private/android_filesystem_capability.h @@ -0,0 +1,117 @@ +/* + * Copyright (C) 2013 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. + */ + +/* + * Taken from linux/capability.h, with minor modifications + */ + +#ifndef _SYSTEM_CORE_INCLUDE_PRIVATE_ANDROID_FILESYSTEM_CAPABILITY_H +#define _SYSTEM_CORE_INCLUDE_PRIVATE_ANDROID_FILESYSTEM_CAPABILITY_H + +#include + +#define __user +#define __u32 uint32_t +#define __le32 uint32_t + +#define _LINUX_CAPABILITY_VERSION_1 0x19980330 +#define _LINUX_CAPABILITY_U32S_1 1 +#define _LINUX_CAPABILITY_VERSION_2 0x20071026 +#define _LINUX_CAPABILITY_U32S_2 2 +#define _LINUX_CAPABILITY_VERSION_3 0x20080522 +#define _LINUX_CAPABILITY_U32S_3 2 + +typedef struct __user_cap_header_struct { + __u32 version; + int pid; +} __user *cap_user_header_t; + +typedef struct __user_cap_data_struct { + __u32 effective; + __u32 permitted; + __u32 inheritable; +} __user *cap_user_data_t; + +#define VFS_CAP_REVISION_MASK 0xFF000000 +#define VFS_CAP_REVISION_SHIFT 24 +#define VFS_CAP_FLAGS_MASK ~VFS_CAP_REVISION_MASK +#define VFS_CAP_FLAGS_EFFECTIVE 0x000001 +#define VFS_CAP_REVISION_1 0x01000000 +#define VFS_CAP_U32_1 1 +#define XATTR_CAPS_SZ_1 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_1)) +#define VFS_CAP_REVISION_2 0x02000000 +#define VFS_CAP_U32_2 2 +#define XATTR_CAPS_SZ_2 (sizeof(__le32)*(1 + 2*VFS_CAP_U32_2)) +#define XATTR_CAPS_SZ XATTR_CAPS_SZ_2 +#define VFS_CAP_U32 VFS_CAP_U32_2 +#define VFS_CAP_REVISION VFS_CAP_REVISION_2 + +struct vfs_cap_data { + __le32 magic_etc; + struct { + __le32 permitted; + __le32 inheritable; + } data[VFS_CAP_U32]; +}; + +#define _LINUX_CAPABILITY_VERSION _LINUX_CAPABILITY_VERSION_1 +#define _LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_1 +#define CAP_CHOWN 0 +#define CAP_DAC_OVERRIDE 1 +#define CAP_DAC_READ_SEARCH 2 +#define CAP_FOWNER 3 +#define CAP_FSETID 4 +#define CAP_KILL 5 +#define CAP_SETGID 6 +#define CAP_SETUID 7 +#define CAP_SETPCAP 8 +#define CAP_LINUX_IMMUTABLE 9 +#define CAP_NET_BIND_SERVICE 10 +#define CAP_NET_BROADCAST 11 +#define CAP_NET_ADMIN 12 +#define CAP_NET_RAW 13 +#define CAP_IPC_LOCK 14 +#define CAP_IPC_OWNER 15 +#define CAP_SYS_MODULE 16 +#define CAP_SYS_RAWIO 17 +#define CAP_SYS_CHROOT 18 +#define CAP_SYS_PTRACE 19 +#define CAP_SYS_PACCT 20 +#define CAP_SYS_ADMIN 21 +#define CAP_SYS_BOOT 22 +#define CAP_SYS_NICE 23 +#define CAP_SYS_RESOURCE 24 +#define CAP_SYS_TIME 25 +#define CAP_SYS_TTY_CONFIG 26 +#define CAP_MKNOD 27 +#define CAP_LEASE 28 +#define CAP_AUDIT_WRITE 29 +#define CAP_AUDIT_CONTROL 30 +#define CAP_SETFCAP 31 +#define CAP_MAC_OVERRIDE 32 +#define CAP_MAC_ADMIN 33 +#define CAP_SYSLOG 34 +#define CAP_WAKE_ALARM 35 +#define CAP_LAST_CAP CAP_WAKE_ALARM +#define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP) +#define CAP_TO_INDEX(x) ((x) >> 5) +#define CAP_TO_MASK(x) (1 << ((x) & 31)) + +#undef __user +#undef __u32 +#undef __le32 + +#endif diff --git a/include/private/android_filesystem_config.h b/include/private/android_filesystem_config.h new file mode 100644 index 0000000..a3d11a7 --- /dev/null +++ b/include/private/android_filesystem_config.h @@ -0,0 +1,306 @@ +/* + * Copyright (C) 2007 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. + */ + +/* This file is used to define the properties of the filesystem +** images generated by build tools (mkbootfs and mkyaffs2image) and +** by the device side of adb. +*/ + +#ifndef _ANDROID_FILESYSTEM_CONFIG_H_ +#define _ANDROID_FILESYSTEM_CONFIG_H_ + +#include +#include +#include +#include + +#ifdef HAVE_ANDROID_OS +#include +#else +#include "android_filesystem_capability.h" +#endif + +/* This is the master Users and Groups config for the platform. + * DO NOT EVER RENUMBER + */ + +#define AID_ROOT 0 /* traditional unix root user */ + +#define AID_SYSTEM 1000 /* system server */ + +#define AID_RADIO 1001 /* telephony subsystem, RIL */ +#define AID_BLUETOOTH 1002 /* bluetooth subsystem */ +#define AID_GRAPHICS 1003 /* graphics devices */ +#define AID_INPUT 1004 /* input devices */ +#define AID_AUDIO 1005 /* audio devices */ +#define AID_CAMERA 1006 /* camera devices */ +#define AID_LOG 1007 /* log devices */ +#define AID_COMPASS 1008 /* compass device */ +#define AID_MOUNT 1009 /* mountd socket */ +#define AID_WIFI 1010 /* wifi subsystem */ +#define AID_ADB 1011 /* android debug bridge (adbd) */ +#define AID_INSTALL 1012 /* group for installing packages */ +#define AID_MEDIA 1013 /* mediaserver process */ +#define AID_DHCP 1014 /* dhcp client */ +#define AID_SDCARD_RW 1015 /* external storage write access */ +#define AID_VPN 1016 /* vpn system */ +#define AID_KEYSTORE 1017 /* keystore subsystem */ +#define AID_USB 1018 /* USB devices */ +#define AID_DRM 1019 /* DRM server */ +#define AID_MDNSR 1020 /* MulticastDNSResponder (service discovery) */ +#define AID_GPS 1021 /* GPS daemon */ +#define AID_UNUSED1 1022 /* deprecated, DO NOT USE */ +#define AID_MEDIA_RW 1023 /* internal media storage write access */ +#define AID_MTP 1024 /* MTP USB driver access */ +#define AID_UNUSED2 1025 /* deprecated, DO NOT USE */ +#define AID_DRMRPC 1026 /* group for drm rpc */ +#define AID_NFC 1027 /* nfc subsystem */ +#define AID_SDCARD_R 1028 /* external storage read access */ +#define AID_CLAT 1029 /* clat part of nat464 */ +#define AID_LOOP_RADIO 1030 /* loop radio devices */ +#define AID_MEDIA_DRM 1031 /* MediaDrm plugins */ +#define AID_PACKAGE_INFO 1032 /* access to installed package details */ +#define AID_SDCARD_PICS 1033 /* external storage photos access */ +#define AID_SDCARD_AV 1034 /* external storage audio/video access */ +#define AID_SDCARD_ALL 1035 /* access all users external storage */ +#define AID_LOGD 1036 /* log daemon */ +#define AID_SHARED_RELRO 1037 /* creator of shared GNU RELRO files */ + +#define AID_SHELL 2000 /* adb and debug shell user */ +#define AID_CACHE 2001 /* cache access */ +#define AID_DIAG 2002 /* access to diagnostic resources */ + +/* The range 2900-2999 is reserved for OEM, and must never be + * used here */ +#define AID_OEM_RESERVED_START 2900 +#define AID_OEM_RESERVED_END 2999 + +/* The 3000 series are intended for use as supplemental group id's only. + * They indicate special Android capabilities that the kernel is aware of. */ +#define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ +#define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ +#define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ +#define AID_NET_RAW 3004 /* can create raw INET sockets */ +#define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */ +#define AID_NET_BW_STATS 3006 /* read bandwidth statistics */ +#define AID_NET_BW_ACCT 3007 /* change bandwidth statistics accounting */ +#define AID_NET_BT_STACK 3008 /* bluetooth: access config files */ + +#define AID_EVERYBODY 9997 /* shared between all apps in the same profile */ +#define AID_MISC 9998 /* access to misc storage */ +#define AID_NOBODY 9999 + +#define AID_APP 10000 /* first app user */ + +#define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */ +#define AID_ISOLATED_END 99999 /* end of uids for fully isolated sandboxed processes */ + +#define AID_USER 100000 /* offset for uid ranges for each user */ + +#define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */ +#define AID_SHARED_GID_END 59999 /* start of gids for apps in each user to share */ + +#if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) +struct android_id_info { + const char *name; + unsigned aid; +}; + +static const struct android_id_info android_ids[] = { + { "root", AID_ROOT, }, + + { "system", AID_SYSTEM, }, + + { "radio", AID_RADIO, }, + { "bluetooth", AID_BLUETOOTH, }, + { "graphics", AID_GRAPHICS, }, + { "input", AID_INPUT, }, + { "audio", AID_AUDIO, }, + { "camera", AID_CAMERA, }, + { "log", AID_LOG, }, + { "compass", AID_COMPASS, }, + { "mount", AID_MOUNT, }, + { "wifi", AID_WIFI, }, + { "adb", AID_ADB, }, + { "install", AID_INSTALL, }, + { "media", AID_MEDIA, }, + { "dhcp", AID_DHCP, }, + { "sdcard_rw", AID_SDCARD_RW, }, + { "vpn", AID_VPN, }, + { "keystore", AID_KEYSTORE, }, + { "usb", AID_USB, }, + { "drm", AID_DRM, }, + { "mdnsr", AID_MDNSR, }, + { "gps", AID_GPS, }, + // AID_UNUSED1 + { "media_rw", AID_MEDIA_RW, }, + { "mtp", AID_MTP, }, + // AID_UNUSED2 + { "drmrpc", AID_DRMRPC, }, + { "nfc", AID_NFC, }, + { "sdcard_r", AID_SDCARD_R, }, + { "clat", AID_CLAT, }, + { "loop_radio", AID_LOOP_RADIO, }, + { "mediadrm", AID_MEDIA_DRM, }, + { "package_info", AID_PACKAGE_INFO, }, + { "sdcard_pics", AID_SDCARD_PICS, }, + { "sdcard_av", AID_SDCARD_AV, }, + { "sdcard_all", AID_SDCARD_ALL, }, + { "logd", AID_LOGD, }, + { "shared_relro", AID_SHARED_RELRO, }, + + { "shell", AID_SHELL, }, + { "cache", AID_CACHE, }, + { "diag", AID_DIAG, }, + + { "net_bt_admin", AID_NET_BT_ADMIN, }, + { "net_bt", AID_NET_BT, }, + { "inet", AID_INET, }, + { "net_raw", AID_NET_RAW, }, + { "net_admin", AID_NET_ADMIN, }, + { "net_bw_stats", AID_NET_BW_STATS, }, + { "net_bw_acct", AID_NET_BW_ACCT, }, + { "net_bt_stack", AID_NET_BT_STACK, }, + + { "everybody", AID_EVERYBODY, }, + { "misc", AID_MISC, }, + { "nobody", AID_NOBODY, }, +}; + +#define android_id_count \ + (sizeof(android_ids) / sizeof(android_ids[0])) + +struct fs_path_config { + unsigned mode; + unsigned uid; + unsigned gid; + uint64_t capabilities; + const char *prefix; +}; + +/* Rules for directories. +** These rules are applied based on "first match", so they +** should start with the most specific path and work their +** way up to the root. +*/ + +static const struct fs_path_config android_dirs[] = { + { 00770, AID_SYSTEM, AID_CACHE, 0, "cache" }, + { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" }, + { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" }, + { 00771, AID_ROOT, AID_ROOT, 0, "data/dalvik-cache" }, + { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" }, + { 00771, AID_SHELL, AID_SHELL, 0, "data/local/tmp" }, + { 00771, AID_SHELL, AID_SHELL, 0, "data/local" }, + { 01771, AID_SYSTEM, AID_MISC, 0, "data/misc" }, + { 00770, AID_DHCP, AID_DHCP, 0, "data/misc/dhcp" }, + { 00771, AID_SHARED_RELRO, AID_SHARED_RELRO, 0, "data/misc/shared_relro" }, + { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" }, + { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" }, + { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" }, + { 00750, AID_ROOT, AID_SHELL, 0, "sbin" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/bin" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin" }, + { 00755, AID_ROOT, AID_ROOT, 0, "system/etc/ppp" }, + { 00755, AID_ROOT, AID_SHELL, 0, "vendor" }, + { 00777, AID_ROOT, AID_ROOT, 0, "sdcard" }, + { 00755, AID_ROOT, AID_ROOT, 0, 0 }, +}; + +/* Rules for files. +** These rules are applied based on "first match", so they +** should start with the most specific path and work their +** way up to the root. Prefixes ending in * denotes wildcard +** and will allow partial matches. +*/ +static const struct fs_path_config android_files[] = { + { 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.rc" }, + { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.sh" }, + { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.ril" }, + { 00550, AID_DHCP, AID_SHELL, 0, "system/etc/dhcpcd/dhcpcd-run-hooks" }, + { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/ppp/*" }, + { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/rc.*" }, + { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app/*" }, + { 00644, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/*" }, + { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private/*" }, + { 00644, AID_APP, AID_APP, 0, "data/data/*" }, + + /* the following five files are INTENTIONALLY set-uid, but they + * are NOT included on user builds. */ + { 04750, AID_ROOT, AID_SHELL, 0, "system/xbin/su" }, + { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/librank" }, + { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procrank" }, + { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procmem" }, + { 04770, AID_ROOT, AID_RADIO, 0, "system/bin/pppd-ril" }, + + /* the following files have enhanced capabilities and ARE included in user builds. */ + { 00750, AID_ROOT, AID_SHELL, (1 << CAP_SETUID) | (1 << CAP_SETGID), "system/bin/run-as" }, + + { 00750, AID_ROOT, AID_ROOT, 0, "system/bin/uncrypt" }, + { 00750, AID_ROOT, AID_ROOT, 0, "system/bin/install-recovery.sh" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/bin/*" }, + { 00755, AID_ROOT, AID_ROOT, 0, "system/lib/valgrind/*" }, + { 00755, AID_ROOT, AID_ROOT, 0, "system/lib64/valgrind/*" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin/*" }, + { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor/bin/*" }, + { 00755, AID_ROOT, AID_SHELL, 0, "vendor/bin/*" }, + { 00750, AID_ROOT, AID_SHELL, 0, "sbin/*" }, + { 00755, AID_ROOT, AID_ROOT, 0, "bin/*" }, + { 00750, AID_ROOT, AID_SHELL, 0, "init*" }, + { 00750, AID_ROOT, AID_SHELL, 0, "sbin/fs_mgr" }, + { 00640, AID_ROOT, AID_SHELL, 0, "fstab.*" }, + { 00644, AID_ROOT, AID_ROOT, 0, 0 }, +}; + +static inline void fs_config(const char *path, int dir, + unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities) +{ + const struct fs_path_config *pc; + int plen; + + if (path[0] == '/') { + path++; + } + + pc = dir ? android_dirs : android_files; + plen = strlen(path); + for(; pc->prefix; pc++){ + int len = strlen(pc->prefix); + if (dir) { + if(plen < len) continue; + if(!strncmp(pc->prefix, path, len)) break; + continue; + } + /* If name ends in * then allow partial matches. */ + if (pc->prefix[len -1] == '*') { + if(!strncmp(pc->prefix, path, len - 1)) break; + } else if (plen == len){ + if(!strncmp(pc->prefix, path, len)) break; + } + } + *uid = pc->uid; + *gid = pc->gid; + *mode = (*mode & (~07777)) | pc->mode; + *capabilities = pc->capabilities; + +#if 0 + fprintf(stderr,"< '%s' '%s' %d %d %o >\n", + path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); +#endif +} +#endif +#endif