service_manager.c revision 31361232e1e7965d00c638ead2903f08f168f1c9
194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood/* Copyright 2008 The Android Open Source Project 294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood */ 394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <errno.h> 594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <fcntl.h> 60b41ad5d6ec86cd2d481969dcff7e88f2805324fElliott Hughes#include <inttypes.h> 713df5f5f8fbc5a3fdfdd5d1ba5dc853cf3f017f0Mark Salyzyn#include <stdio.h> 813df5f5f8fbc5a3fdfdd5d1ba5dc853cf3f017f0Mark Salyzyn#include <stdlib.h> 913df5f5f8fbc5a3fdfdd5d1ba5dc853cf3f017f0Mark Salyzyn#include <string.h> 1094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 116b9c6d23f69a64f76fc26cda6989183042b0621cArve Hjønnevåg#include <cutils/multiuser.h> 126b9c6d23f69a64f76fc26cda6989183042b0621cArve Hjønnevåg 1394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include <private/android_filesystem_config.h> 1494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn#include <selinux/android.h> 167d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich#include <selinux/avc.h> 1769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 1894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#include "binder.h" 1994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2031361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#ifdef VENDORSERVICEMANAGER 2131361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#define LOG_TAG "VendorServiceManager" 2294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#else 2394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#define LOG_TAG "ServiceManager" 2494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood#endif 2531361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#include <log/log.h> 2694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 278fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstruct audit_data { 288fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts pid_t pid; 298fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts uid_t uid; 308fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts const char *name; 318fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts}; 328fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts 337d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevichconst char *str8(const uint16_t *x, size_t x_len) 3494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 3594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood static char buf[128]; 367d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich size_t max = 127; 3794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood char *p = buf; 3894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 397d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (x_len < max) { 407d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich max = x_len; 417d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 427d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich 4394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (x) { 447d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich while ((max > 0) && (*x != '\0')) { 4594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood *p++ = *x++; 467d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich max--; 4794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 4894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 4994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood *p++ = 0; 5094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return buf; 5194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 5294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 539b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescuint str16eq(const uint16_t *a, const char *b) 5494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 5594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood while (*a && *b) 5694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (*a++ != *b++) return 0; 5794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (*a || *b) 5894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 5994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 1; 6094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 6194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 62c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahnstatic char *service_manager_context; 6369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahnstatic struct selabel_handle* sehandle; 6469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 658fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic bool check_mac_perms(pid_t spid, uid_t uid, const char *tctx, const char *perm, const char *name) 6669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn{ 6769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn char *sctx = NULL; 68c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn const char *class = "service_manager"; 69c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn bool allowed; 708fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts struct audit_data ad; 7169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 72c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn if (getpidcon(spid, &sctx) < 0) { 73c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn ALOGE("SELinux: getpidcon(pid=%d) failed to retrieve pid context.\n", spid); 7469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 7569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 7669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 778fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts ad.pid = spid; 788fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts ad.uid = uid; 798fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts ad.name = name; 808fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts 818fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts int result = selinux_check_access(sctx, tctx, class, perm, (void *) &ad); 82c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn allowed = (result == 0); 83c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 84c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn freecon(sctx); 85c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn return allowed; 86c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn} 87c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 888fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic bool check_mac_perms_from_getcon(pid_t spid, uid_t uid, const char *perm) 89c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn{ 908fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts return check_mac_perms(spid, uid, service_manager_context, perm, NULL); 91c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn} 92c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 938fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic bool check_mac_perms_from_lookup(pid_t spid, uid_t uid, const char *perm, const char *name) 94c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn{ 95c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn bool allowed; 96c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn char *tctx = NULL; 97c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 98c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn if (!sehandle) { 99c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn ALOGE("SELinux: Failed to find sehandle. Aborting service_manager.\n"); 100c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn abort(); 10169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 10269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 103c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn if (selabel_lookup(sehandle, &tctx, name, 0) != 0) { 104c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn ALOGE("SELinux: No match for %s in service_contexts.\n", name); 10569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return false; 10669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 10769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 1088fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts allowed = check_mac_perms(spid, uid, tctx, perm, name); 10969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn freecon(tctx); 11069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return allowed; 11169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn} 11269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 1138fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic int svc_can_register(const uint16_t *name, size_t name_len, pid_t spid, uid_t uid) 114c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn{ 115c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn const char *perm = "add"; 1165fa90a063f77054fc6068f45f6a21f43d64364b6Arve Hjønnevåg 1176b9c6d23f69a64f76fc26cda6989183042b0621cArve Hjønnevåg if (multiuser_get_app_id(uid) >= AID_APP) { 1185fa90a063f77054fc6068f45f6a21f43d64364b6Arve Hjønnevåg return 0; /* Don't allow apps to register services */ 1195fa90a063f77054fc6068f45f6a21f43d64364b6Arve Hjønnevåg } 1205fa90a063f77054fc6068f45f6a21f43d64364b6Arve Hjønnevåg 1218fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts return check_mac_perms_from_lookup(spid, uid, perm, str8(name, name_len)) ? 1 : 0; 122c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn} 123c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 1248fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic int svc_can_list(pid_t spid, uid_t uid) 12594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 126c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn const char *perm = "list"; 1278fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts return check_mac_perms_from_getcon(spid, uid, perm) ? 1 : 0; 128c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn} 129c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 1308fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Robertsstatic int svc_can_find(const uint16_t *name, size_t name_len, pid_t spid, uid_t uid) 131c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn{ 132c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn const char *perm = "find"; 1338fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts return check_mac_perms_from_lookup(spid, uid, perm, str8(name, name_len)) ? 1 : 0; 13494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 13594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1369b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo 13794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 13894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *next; 1395fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu uint32_t handle; 14094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_death death; 14194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood int allow_isolated; 1429b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu size_t len; 14394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint16_t name[0]; 14494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood}; 14594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1469b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo *svclist = NULL; 14794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1489b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescustruct svcinfo *find_svc(const uint16_t *s16, size_t len) 14994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 15094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 15194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 15294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood for (si = svclist; si; si = si->next) { 15394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if ((len == si->len) && 15494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood !memcmp(s16, si->name, len * sizeof(uint16_t))) { 15594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return si; 15694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 15794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 1589b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu return NULL; 15994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 16094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 16194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodvoid svcinfo_death(struct binder_state *bs, void *ptr) 16294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 1639b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu struct svcinfo *si = (struct svcinfo* ) ptr; 1649b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 1657d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich ALOGI("service '%s' died\n", str8(si->name, si->len)); 1665fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (si->handle) { 1675fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_release(bs, si->handle); 1685fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = 0; 1699b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu } 17094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 17194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1729b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescuuint16_t svcmgr_id[] = { 17394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 'a','n','d','r','o','i','d','.','o','s','.', 1749b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 'I','S','e','r','v','i','c','e','M','a','n','a','g','e','r' 17594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood}; 17694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 1779b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 178d57d9b900da83b1b5431d90e250f86c0047c618aIan Pedowitzuint32_t do_find_service(const uint16_t *s, size_t len, uid_t uid, pid_t spid) 17994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 180b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich struct svcinfo *si = find_svc(s, len); 18194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 182b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich if (!si || !si->handle) { 183c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn return 0; 184c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn } 185b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich 186b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich if (!si->allow_isolated) { 187b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich // If this service doesn't allow access from isolated processes, 188b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich // then check the uid to see if it is isolated. 189b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich uid_t appid = uid % AID_USER; 190b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich if (appid >= AID_ISOLATED_START && appid <= AID_ISOLATED_END) { 191b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich return 0; 19294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 193b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich } 194b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich 1958fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts if (!svc_can_find(s, len, spid, uid)) { 19694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 19794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 198b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich 199b27bbd18bb65b3744ae066fcd6826285dec8b469Nick Kralevich return si->handle; 20094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 20194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 20294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodint do_add_service(struct binder_state *bs, 2039b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu const uint16_t *s, size_t len, 20469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn uint32_t handle, uid_t uid, int allow_isolated, 20569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn pid_t spid) 20694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 20794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 2083a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu 2097d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich //ALOGI("add_service('%s',%x,%s) uid=%d\n", str8(s, len), handle, 21094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // allow_isolated ? "allow_isolated" : "!allow_isolated", uid); 21194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2125fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (!handle || (len == 0) || (len > 127)) 21394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 21494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2158fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts if (!svc_can_register(s, len, spid, uid)) { 2165fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - PERMISSION DENIED\n", 2177d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 21894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 21994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 22094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 22194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = find_svc(s, len); 22294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (si) { 2235fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (si->handle) { 2245fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - ALREADY REGISTERED, OVERRIDE\n", 2257d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 22694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood svcinfo_death(bs, si); 22794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 2285fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = handle; 22994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } else { 23094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = malloc(sizeof(*si) + (len + 1) * sizeof(uint16_t)); 23194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (!si) { 2325fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu ALOGE("add_service('%s',%x) uid=%d - OUT OF MEMORY\n", 2337d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich str8(s, len), handle, uid); 23494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 23594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 2365fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu si->handle = handle; 23794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->len = len; 23894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood memcpy(si->name, s, (len + 1) * sizeof(uint16_t)); 23994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->name[len] = '\0'; 2409b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu si->death.func = (void*) svcinfo_death; 24194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->death.ptr = si; 24294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->allow_isolated = allow_isolated; 24394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si->next = svclist; 24494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood svclist = si; 24594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 24694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2475fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_acquire(bs, handle); 2485fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu binder_link_to_death(bs, handle, &si->death); 24994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 25094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 25194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 25294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwoodint svcmgr_handler(struct binder_state *bs, 253bcf38880c65297da58194eb0c0ce8d6e2bab7d94Serban Constantinescu struct binder_transaction_data *txn, 25494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_io *msg, 25594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_io *reply) 25694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 25794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct svcinfo *si; 25894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint16_t *s; 2599b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu size_t len; 2605fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu uint32_t handle; 26194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood uint32_t strict_policy; 26294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood int allow_isolated; 26394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2640b41ad5d6ec86cd2d481969dcff7e88f2805324fElliott Hughes //ALOGI("target=%p code=%d pid=%d uid=%d\n", 2650b41ad5d6ec86cd2d481969dcff7e88f2805324fElliott Hughes // (void*) txn->target.ptr, txn->code, txn->sender_pid, txn->sender_euid); 26694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 2670b41ad5d6ec86cd2d481969dcff7e88f2805324fElliott Hughes if (txn->target.ptr != BINDER_SERVICE_MANAGER) 26894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 26994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 270e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg if (txn->code == PING_TRANSACTION) 271e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg return 0; 272e5245cbf5d4e830cf605ef07f5d284d7c5d2867eArve Hjønnevåg 27394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // Equivalent to Parcel::enforceInterface(), reading the RPC 27494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // header with the strict mode policy mask and the interface name. 27594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // Note that we ignore the strict_policy and don't propagate it 27694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood // further (since we do no outbound RPCs anyway). 27794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood strict_policy = bio_get_uint32(msg); 27894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 2797d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 2807d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 2817d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 2827d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich 28394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if ((len != (sizeof(svcmgr_id) / 2)) || 28494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood memcmp(svcmgr_id, s, sizeof(svcmgr_id))) { 2857d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich fprintf(stderr,"invalid id %s\n", str8(s, len)); 28694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 28794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 28894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 28969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (sehandle && selinux_status_updated() > 0) { 29069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn struct selabel_handle *tmp_sehandle = selinux_android_service_context_handle(); 29169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (tmp_sehandle) { 29269154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn selabel_close(sehandle); 29369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn sehandle = tmp_sehandle; 29469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 29569154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn } 29669154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 29794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood switch(txn->code) { 29894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_GET_SERVICE: 29994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_CHECK_SERVICE: 30094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 3017d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 3027d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 3037d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 304d57d9b900da83b1b5431d90e250f86c0047c618aIan Pedowitz handle = do_find_service(s, len, txn->sender_euid, txn->sender_pid); 3055fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu if (!handle) 30694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood break; 3075fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu bio_put_ref(reply, handle); 30894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 30994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 31094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_ADD_SERVICE: 31194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood s = bio_get_string16(msg, &len); 3127d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich if (s == NULL) { 3137d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich return -1; 3147d42a3c31ba78a418f9bdde0e0ab951469f321b5Nick Kralevich } 3155fb1b8836aa5cf0f38b49bc7bfb8343b84fdf9bfSerban Constantinescu handle = bio_get_ref(msg); 31694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood allow_isolated = bio_get_uint32(msg) ? 1 : 0; 31769154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn if (do_add_service(bs, s, len, handle, txn->sender_euid, 31869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn allow_isolated, txn->sender_pid)) 31994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 32094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood break; 32194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 32294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood case SVC_MGR_LIST_SERVICES: { 3233a345f0df5f62d77e875a289e9aee89f0d1b526eSerban Constantinescu uint32_t n = bio_get_uint32(msg); 32494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 3258fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts if (!svc_can_list(txn->sender_pid, txn->sender_euid)) { 326c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn ALOGE("list_service() uid=%d - PERMISSION DENIED\n", 327c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn txn->sender_euid); 328c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn return -1; 329c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn } 33094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = svclist; 33194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood while ((n-- > 0) && si) 33294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood si = si->next; 33394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (si) { 33494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood bio_put_string16(reply, si->name); 33594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 33694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 33794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 33894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 33994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood default: 34094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood ALOGE("unknown code %d\n", txn->code); 34194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 34294afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 34394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 34494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood bio_put_uint32(reply, 0); 34594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 34694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 34794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 34869154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 349d57d9b900da83b1b5431d90e250f86c0047c618aIan Pedowitzstatic int audit_callback(void *data, __unused security_class_t cls, char *buf, size_t len) 35069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn{ 3518fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts struct audit_data *ad = (struct audit_data *)data; 3528fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts 3538fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts if (!ad || !ad->name) { 3548fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts ALOGE("No service manager audit data"); 3558fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts return 0; 3568fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts } 3578fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts 3588fb0f92e0fe3c286ebb120bae9e1570ee109fa12William Roberts snprintf(buf, len, "service=%s pid=%d uid=%d", ad->name, ad->pid, ad->uid); 35969154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn return 0; 36069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn} 36169154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 36269b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenenint main(int argc, char** argv) 36394afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood{ 36494afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood struct binder_state *bs; 36593ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil union selinux_callback cb; 36669b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen char *driver; 36794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 36869b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen if (argc > 1) { 36969b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen driver = argv[1]; 37069b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen } else { 37169b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen driver = "/dev/binder"; 37269b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen } 37369b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen 37469b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen bs = binder_open(driver, 128*1024); 375a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu if (!bs) { 37631361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#ifdef VENDORSERVICEMANAGER 37731361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen ALOGW("failed to open binder driver %s\n", driver); 37831361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen while (true) { 37931361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen sleep(UINT_MAX); 38031361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen } 38131361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#else 38269b0515dcd58a479c41977aca7bd18b865571d09Martijn Coenen ALOGE("failed to open binder driver %s\n", driver); 38331361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#endif 384a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu return -1; 385a44542ca74b7da5b44ba30c205c3244805bb0600Serban Constantinescu } 38694afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 38794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood if (binder_become_context_manager(bs)) { 38894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood ALOGE("cannot become context manager (%s)\n", strerror(errno)); 38994afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return -1; 39094afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood } 39194afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood 39293ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil cb.func_audit = audit_callback; 39393ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil selinux_set_callback(SELINUX_CB_AUDIT, cb); 39493ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil cb.func_log = selinux_log_callback; 39593ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil selinux_set_callback(SELINUX_CB_LOG, cb); 39693ba7019cb473158bdea1b8fc73a1db34ea9a129Sandeep Patil 39731361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#ifdef VENDORSERVICEMANAGER 39831361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen sehandle = selinux_android_vendor_service_context_handle(); 39931361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#else 40069154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn sehandle = selinux_android_service_context_handle(); 40131361232e1e7965d00c638ead2903f08f168f1c9Martijn Coenen#endif 402bea0746b241d15626cf0a56828efc1d4640dbda7Stephen Smalley selinux_status_open(true); 40369154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 404eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich if (sehandle == NULL) { 405eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich ALOGE("SELinux: Failed to acquire sehandle. Aborting.\n"); 406eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich abort(); 407eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich } 408c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 409eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich if (getcon(&service_manager_context) != 0) { 410eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich ALOGE("SELinux: Failed to acquire service_manager context. Aborting.\n"); 411eb4d5cbde02b17259e968321ef457b158ce1da4eNick Kralevich abort(); 412c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn } 413c67e6307cadb1f2cd876907c42d39b8374b93acdRiley Spahn 41469154df9efd3ffb7580b72a0138f58a2f5443db6Riley Spahn 41594afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood binder_loop(bs, svcmgr_handler); 4169b738bb4110926b85da65d36b2e6f1a50199ec4cSerban Constantinescu 41794afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood return 0; 41894afecf4b6f437b3ee9a076242402e421c6c07a6Mike Lockwood} 419