Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	node_credentials.cc	Lines:	204	235	86.8 %
Date:	2022-09-07 04:19:57	Branches:	99	174	56.9 %


#include "env-inl.h"
#include "node_external_reference.h"
#include "node_internals.h"
#include "util-inl.h"

#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
#include <grp.h>  // getgrnam()
#include <pwd.h>  // getpwnam()
#endif            // NODE_IMPLEMENTS_POSIX_CREDENTIALS

#if !defined(_MSC_VER)
#include <unistd.h>  // setuid, getuid
#endif
#ifdef __linux__
#include <linux/capability.h>
#include <sys/auxv.h>
#include <sys/syscall.h>
#endif  // __linux__

namespace node {

using v8::Array;
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Object;
using v8::String;
using v8::TryCatch;
using v8::Uint32;
using v8::Value;

bool linux_at_secure() {
  // This could reasonably be a static variable, but this way
  // we can guarantee that this function is always usable
  // and returns the correct value,  e.g. even in static
  // initialization code in other files.
#ifdef __linux__
  static const bool value = getauxval(AT_SECURE);
  return value;
#else
  return false;
#endif
}

namespace credentials {

#if defined(__linux__)
// Returns true if the current process only has the passed-in capability.
bool HasOnly(int capability) {
  DCHECK(cap_valid(capability));

  struct __user_cap_data_struct cap_data[2];
  struct __user_cap_header_struct cap_header_data = {
    _LINUX_CAPABILITY_VERSION_3,
    getpid()};


  if (syscall(SYS_capget, &cap_header_data, &cap_data) != 0) {
    return false;
  }
  if (capability < 32) {
    return cap_data[0].permitted ==
        static_cast<unsigned int>(CAP_TO_MASK(capability));
  }
  return cap_data[1].permitted ==
      static_cast<unsigned int>(CAP_TO_MASK(capability));
}
#endif

// Look up the environment variable and allow the lookup if the current
// process only has the capability CAP_NET_BIND_SERVICE set. If the current
// process does not have any capabilities set and the process is running as
// setuid root then lookup will not be allowed.
bool SafeGetenv(const char* key,
                std::string* text,
                std::shared_ptr<KVStore> env_vars,
                v8::Isolate* isolate) {
#if !defined(__CloudABI__) && !defined(_WIN32)
#if defined(__linux__)
  if ((!HasOnly(CAP_NET_BIND_SERVICE) && linux_at_secure()) ||
      getuid() != geteuid() || getgid() != getegid())
#else
  if (linux_at_secure() || getuid() != geteuid() || getgid() != getegid())
#endif
    goto fail;
#endif

  if (env_vars != nullptr) {
    DCHECK_NOT_NULL(isolate);
    HandleScope handle_scope(isolate);
    TryCatch ignore_errors(isolate);
    MaybeLocal<String> maybe_value = env_vars->Get(
        isolate, String::NewFromUtf8(isolate, key).ToLocalChecked());
    Local<String> value;
    if (!maybe_value.ToLocal(&value)) goto fail;
    String::Utf8Value utf8_value(isolate, value);
    if (*utf8_value == nullptr) goto fail;
    *text = std::string(*utf8_value, utf8_value.length());
    return true;
  }

  {
    Mutex::ScopedLock lock(per_process::env_var_mutex);

    size_t init_sz = 256;
    MaybeStackBuffer<char, 256> val;
    int ret = uv_os_getenv(key, *val, &init_sz);

    if (ret == UV_ENOBUFS) {
      // Buffer is not large enough, reallocate to the updated init_sz
      // and fetch env value again.
      val.AllocateSufficientStorage(init_sz);
      ret = uv_os_getenv(key, *val, &init_sz);
    }

    if (ret >= 0) {  // Env key value fetch success.
      *text = *val;
      return true;
    }
  }

fail:
  text->clear();
  return false;
}

static void SafeGetenv(const FunctionCallbackInfo<Value>& args) {
  CHECK(args[0]->IsString());
  Environment* env = Environment::GetCurrent(args);
  Isolate* isolate = env->isolate();
  Utf8Value strenvtag(isolate, args[0]);
  std::string text;
  if (!SafeGetenv(*strenvtag, &text, env->env_vars(), isolate)) return;
  Local<Value> result =
      ToV8Value(isolate->GetCurrentContext(), text).ToLocalChecked();
  args.GetReturnValue().Set(result);
}

#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS

static const uid_t uid_not_found = static_cast<uid_t>(-1);
static const gid_t gid_not_found = static_cast<gid_t>(-1);

static uid_t uid_by_name(const char* name) {
  struct passwd pwd;
  struct passwd* pp;
  char buf[8192];

  errno = 0;
  pp = nullptr;

  if (getpwnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
    return pp->pw_uid;

  return uid_not_found;
}

static char* name_by_uid(uid_t uid) {
  struct passwd pwd;
  struct passwd* pp;
  char buf[8192];
  int rc;

  errno = 0;
  pp = nullptr;

  if ((rc = getpwuid_r(uid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
      pp != nullptr) {
    return strdup(pp->pw_name);
  }

  if (rc == 0) errno = ENOENT;

  return nullptr;
}

static gid_t gid_by_name(const char* name) {
  struct group pwd;
  struct group* pp;
  char buf[8192];

  errno = 0;
  pp = nullptr;

  if (getgrnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
    return pp->gr_gid;

  return gid_not_found;
}

#if 0  // For future use.
static const char* name_by_gid(gid_t gid) {
  struct group pwd;
  struct group* pp;
  char buf[8192];
  int rc;

  errno = 0;
  pp = nullptr;

  if ((rc = getgrgid_r(gid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
      pp != nullptr) {
    return strdup(pp->gr_name);
  }

  if (rc == 0)
    errno = ENOENT;

  return nullptr;
}
#endif

static uid_t uid_by_name(Isolate* isolate, Local<Value> value) {
  if (value->IsUint32()) {
    return static_cast<uid_t>(value.As<Uint32>()->Value());
  } else {
    Utf8Value name(isolate, value);
    return uid_by_name(*name);
  }
}

static gid_t gid_by_name(Isolate* isolate, Local<Value> value) {
  if (value->IsUint32()) {
    return static_cast<gid_t>(value.As<Uint32>()->Value());
  } else {
    Utf8Value name(isolate, value);
    return gid_by_name(*name);
  }
}

static void GetUid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->has_run_bootstrapping_code());
  // uid_t is an uint32_t on all supported platforms.
  args.GetReturnValue().Set(static_cast<uint32_t>(getuid()));
}

static void GetGid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->has_run_bootstrapping_code());
  // gid_t is an uint32_t on all supported platforms.
  args.GetReturnValue().Set(static_cast<uint32_t>(getgid()));
}

static void GetEUid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->has_run_bootstrapping_code());
  // uid_t is an uint32_t on all supported platforms.
  args.GetReturnValue().Set(static_cast<uint32_t>(geteuid()));
}

static void GetEGid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->has_run_bootstrapping_code());
  // gid_t is an uint32_t on all supported platforms.
  args.GetReturnValue().Set(static_cast<uint32_t>(getegid()));
}

static void SetGid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->owns_process_state());

  CHECK_EQ(args.Length(), 1);
  CHECK(args[0]->IsUint32() || args[0]->IsString());

  gid_t gid = gid_by_name(env->isolate(), args[0]);

  if (gid == gid_not_found) {
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    args.GetReturnValue().Set(1);
  } else if (setgid(gid)) {
    env->ThrowErrnoException(errno, "setgid");
  } else {
    args.GetReturnValue().Set(0);
  }
}

static void SetEGid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->owns_process_state());

  CHECK_EQ(args.Length(), 1);
  CHECK(args[0]->IsUint32() || args[0]->IsString());

  gid_t gid = gid_by_name(env->isolate(), args[0]);

  if (gid == gid_not_found) {
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    args.GetReturnValue().Set(1);
  } else if (setegid(gid)) {
    env->ThrowErrnoException(errno, "setegid");
  } else {
    args.GetReturnValue().Set(0);
  }
}

static void SetUid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->owns_process_state());

  CHECK_EQ(args.Length(), 1);
  CHECK(args[0]->IsUint32() || args[0]->IsString());

  uid_t uid = uid_by_name(env->isolate(), args[0]);

  if (uid == uid_not_found) {
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    args.GetReturnValue().Set(1);
  } else if (setuid(uid)) {
    env->ThrowErrnoException(errno, "setuid");
  } else {
    args.GetReturnValue().Set(0);
  }
}

static void SetEUid(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->owns_process_state());

  CHECK_EQ(args.Length(), 1);
  CHECK(args[0]->IsUint32() || args[0]->IsString());

  uid_t uid = uid_by_name(env->isolate(), args[0]);

  if (uid == uid_not_found) {
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    args.GetReturnValue().Set(1);
  } else if (seteuid(uid)) {
    env->ThrowErrnoException(errno, "seteuid");
  } else {
    args.GetReturnValue().Set(0);
  }
}

static void GetGroups(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  CHECK(env->has_run_bootstrapping_code());

  int ngroups = getgroups(0, nullptr);
  if (ngroups == -1) return env->ThrowErrnoException(errno, "getgroups");

  std::vector<gid_t> groups(ngroups);

  ngroups = getgroups(ngroups, groups.data());
  if (ngroups == -1)
    return env->ThrowErrnoException(errno, "getgroups");

  groups.resize(ngroups);
  gid_t egid = getegid();
  if (std::find(groups.begin(), groups.end(), egid) == groups.end())
    groups.push_back(egid);
  MaybeLocal<Value> array = ToV8Value(env->context(), groups);
  if (!array.IsEmpty())
    args.GetReturnValue().Set(array.ToLocalChecked());
}

static void SetGroups(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);

  CHECK_EQ(args.Length(), 1);
  CHECK(args[0]->IsArray());

  Local<Array> groups_list = args[0].As<Array>();
  size_t size = groups_list->Length();
  MaybeStackBuffer<gid_t, 64> groups(size);

  for (size_t i = 0; i < size; i++) {
    gid_t gid = gid_by_name(
        env->isolate(), groups_list->Get(env->context(), i).ToLocalChecked());

    if (gid == gid_not_found) {
      // Tells JS to throw ERR_INVALID_CREDENTIAL
      args.GetReturnValue().Set(static_cast<uint32_t>(i + 1));
      return;
    }

    groups[i] = gid;
  }

  int rc = setgroups(size, *groups);

  if (rc == -1) return env->ThrowErrnoException(errno, "setgroups");

  args.GetReturnValue().Set(0);
}

static void InitGroups(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);

  CHECK_EQ(args.Length(), 2);
  CHECK(args[0]->IsUint32() || args[0]->IsString());
  CHECK(args[1]->IsUint32() || args[1]->IsString());

  Utf8Value arg0(env->isolate(), args[0]);
  gid_t extra_group;
  bool must_free;
  char* user;

  if (args[0]->IsUint32()) {
    user = name_by_uid(args[0].As<Uint32>()->Value());
    must_free = true;
  } else {
    user = *arg0;
    must_free = false;
  }

  if (user == nullptr) {
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    return args.GetReturnValue().Set(1);
  }

  extra_group = gid_by_name(env->isolate(), args[1]);

  if (extra_group == gid_not_found) {
    if (must_free) free(user);
    // Tells JS to throw ERR_INVALID_CREDENTIAL
    return args.GetReturnValue().Set(2);
  }

  int rc = initgroups(user, extra_group);

  if (must_free) free(user);

  if (rc) return env->ThrowErrnoException(errno, "initgroups");

  args.GetReturnValue().Set(0);
}

#endif  // NODE_IMPLEMENTS_POSIX_CREDENTIALS

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
  registry->Register(SafeGetenv);

#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
  registry->Register(GetUid);
  registry->Register(GetEUid);
  registry->Register(GetGid);
  registry->Register(GetEGid);
  registry->Register(GetGroups);

  registry->Register(InitGroups);
  registry->Register(SetEGid);
  registry->Register(SetEUid);
  registry->Register(SetGid);
  registry->Register(SetUid);
  registry->Register(SetGroups);
#endif  // NODE_IMPLEMENTS_POSIX_CREDENTIALS
}

static void Initialize(Local<Object> target,
                       Local<Value> unused,
                       Local<Context> context,
                       void* priv) {
  Environment* env = Environment::GetCurrent(context);
  Isolate* isolate = env->isolate();

  SetMethod(context, target, "safeGetenv", SafeGetenv);

#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
  READONLY_TRUE_PROPERTY(target, "implementsPosixCredentials");
  SetMethodNoSideEffect(context, target, "getuid", GetUid);
  SetMethodNoSideEffect(context, target, "geteuid", GetEUid);
  SetMethodNoSideEffect(context, target, "getgid", GetGid);
  SetMethodNoSideEffect(context, target, "getegid", GetEGid);
  SetMethodNoSideEffect(context, target, "getgroups", GetGroups);

  if (env->owns_process_state()) {
    SetMethod(context, target, "initgroups", InitGroups);
    SetMethod(context, target, "setegid", SetEGid);
    SetMethod(context, target, "seteuid", SetEUid);
    SetMethod(context, target, "setgid", SetGid);
    SetMethod(context, target, "setuid", SetUid);
    SetMethod(context, target, "setgroups", SetGroups);
  }
#endif  // NODE_IMPLEMENTS_POSIX_CREDENTIALS
}

}  // namespace credentials
}  // namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(credentials, node::credentials::Initialize)
NODE_MODULE_EXTERNAL_REFERENCE(credentials,
                               node::credentials::RegisterExternalReferences)


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "env-inl.h"
2			#include "node_external_reference.h"
3			#include "node_internals.h"
4			#include "util-inl.h"
5
6			#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
7			#include <grp.h> // getgrnam()
8			#include <pwd.h> // getpwnam()
9			#endif // NODE_IMPLEMENTS_POSIX_CREDENTIALS
10
11			#if !defined(_MSC_VER)
12			#include <unistd.h> // setuid, getuid
13			#endif
14			#ifdef __linux__
15			#include <linux/capability.h>
16			#include <sys/auxv.h>
17			#include <sys/syscall.h>
18			#endif // __linux__
19
20			namespace node {
21
22			using v8::Array;
23			using v8::Context;
24			using v8::FunctionCallbackInfo;
25			using v8::HandleScope;
26			using v8::Isolate;
27			using v8::Local;
28			using v8::MaybeLocal;
29			using v8::Object;
30			using v8::String;
31			using v8::TryCatch;
32			using v8::Uint32;
33			using v8::Value;
34
35		68780	bool linux_at_secure() {
36			// This could reasonably be a static variable, but this way
37			// we can guarantee that this function is always usable
38			// and returns the correct value, e.g. even in static
39			// initialization code in other files.
40			#ifdef __linux__
41	✓✓✓✗	68780	static const bool value = getauxval(AT_SECURE);
42		68780	return value;
43			#else
44			return false;
45			#endif
46			}
47
48			namespace credentials {
49
50			#if defined(__linux__)
51			// Returns true if the current process only has the passed-in capability.
52		68780	bool HasOnly(int capability) {
53			DCHECK(cap_valid(capability));
54
55			struct __user_cap_data_struct cap_data[2];
56		68780	struct __user_cap_header_struct cap_header_data = {
57			_LINUX_CAPABILITY_VERSION_3,
58		68780	getpid()};
59
60
61	✗✓	68780	if (syscall(SYS_capget, &cap_header_data, &cap_data) != 0) {
62			return false;
63			}
64	✓✗	68780	if (capability < 32) {
65		68780	return cap_data[0].permitted ==
66		68780	static_cast<unsigned int>(CAP_TO_MASK(capability));
67			}
68			return cap_data[1].permitted ==
69			static_cast<unsigned int>(CAP_TO_MASK(capability));
70			}
71			#endif
72
73			// Look up the environment variable and allow the lookup if the current
74			// process only has the capability CAP_NET_BIND_SERVICE set. If the current
75			// process does not have any capabilities set and the process is running as
76			// setuid root then lookup will not be allowed.
77		68780	bool SafeGetenv(const char* key,
78			std::string* text,
79			std::shared_ptr<KVStore> env_vars,
80			v8::Isolate* isolate) {
81			#if !defined(__CloudABI__) && !defined(_WIN32)
82			#if defined(__linux__)
83	✓✗✓✗	206340	if ((!HasOnly(CAP_NET_BIND_SERVICE) && linux_at_secure()) \|\|
84	✓✗✗✓ ✗✓	206340	getuid() != geteuid() \|\| getgid() != getegid())
85			#else
86			if (linux_at_secure() \|\| getuid() != geteuid() \|\| getgid() != getegid())
87			#endif
88			goto fail;
89			#endif
90
91	✓✓	68780	if (env_vars != nullptr) {
92			DCHECK_NOT_NULL(isolate);
93		19042	HandleScope handle_scope(isolate);
94		19042	TryCatch ignore_errors(isolate);
95		19042	MaybeLocal<String> maybe_value = env_vars->Get(
96		38084	isolate, String::NewFromUtf8(isolate, key).ToLocalChecked());
97			Local<String> value;
98	✓✓	19042	if (!maybe_value.ToLocal(&value)) goto fail;
99		6344	String::Utf8Value utf8_value(isolate, value);
100	✗✓	6344	if (*utf8_value == nullptr) goto fail;
101		6344	text = std::string(utf8_value, utf8_value.length());
102		6344	return true;
103			}
104
105			{
106		49738	Mutex::ScopedLock lock(per_process::env_var_mutex);
107
108		49738	size_t init_sz = 256;
109		49738	MaybeStackBuffer<char, 256> val;
110		49738	int ret = uv_os_getenv(key, *val, &init_sz);
111
112	✗✓	49738	if (ret == UV_ENOBUFS) {
113			// Buffer is not large enough, reallocate to the updated init_sz
114			// and fetch env value again.
115			val.AllocateSufficientStorage(init_sz);
116			ret = uv_os_getenv(key, *val, &init_sz);
117			}
118
119	✓✓	49738	if (ret >= 0) { // Env key value fetch success.
120		5490	text = val;
121		5490	return true;
122			}
123			}
124
125		56946	fail:
126		56946	text->clear();
127		56946	return false;
128			}
129
130	✓✗	12796	static void SafeGetenv(const FunctionCallbackInfo<Value>& args) {
131	✗✓	25592	CHECK(args[0]->IsString());
132		12796	Environment* env = Environment::GetCurrent(args);
133		12796	Isolate* isolate = env->isolate();
134		12796	Utf8Value strenvtag(isolate, args[0]);
135		12796	std::string text;
136	✓✓	12796	if (!SafeGetenv(*strenvtag, &text, env->env_vars(), isolate)) return;
137			Local<Value> result =
138		12576	ToV8Value(isolate->GetCurrentContext(), text).ToLocalChecked();
139		12576	args.GetReturnValue().Set(result);
140			}
141
142			#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
143
144			static const uid_t uid_not_found = static_cast<uid_t>(-1);
145			static const gid_t gid_not_found = static_cast<gid_t>(-1);
146
147		4	static uid_t uid_by_name(const char* name) {
148			struct passwd pwd;
149			struct passwd* pp;
150			char buf[8192];
151
152		4	errno = 0;
153		4	pp = nullptr;
154
155	✓✗✓✓ ✓✓	4	if (getpwnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
156		2	return pp->pw_uid;
157
158		2	return uid_not_found;
159			}
160
161			static char* name_by_uid(uid_t uid) {
162			struct passwd pwd;
163			struct passwd* pp;
164			char buf[8192];
165			int rc;
166
167			errno = 0;
168			pp = nullptr;
169
170			if ((rc = getpwuid_r(uid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
171			pp != nullptr) {
172			return strdup(pp->pw_name);
173			}
174
175			if (rc == 0) errno = ENOENT;
176
177			return nullptr;
178			}
179
180		4	static gid_t gid_by_name(const char* name) {
181			struct group pwd;
182			struct group* pp;
183			char buf[8192];
184
185		4	errno = 0;
186		4	pp = nullptr;
187
188	✓✗✗✓ ✗✓	4	if (getgrnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != nullptr)
189			return pp->gr_gid;
190
191		4	return gid_not_found;
192			}
193
194			#if 0 // For future use.
195			static const char* name_by_gid(gid_t gid) {
196			struct group pwd;
197			struct group* pp;
198			char buf[8192];
199			int rc;
200
201			errno = 0;
202			pp = nullptr;
203
204			if ((rc = getgrgid_r(gid, &pwd, buf, sizeof(buf), &pp)) == 0 &&
205			pp != nullptr) {
206			return strdup(pp->gr_name);
207			}
208
209			if (rc == 0)
210			errno = ENOENT;
211
212			return nullptr;
213			}
214			#endif
215
216		6	static uid_t uid_by_name(Isolate* isolate, Local<Value> value) {
217	✓✓	6	if (value->IsUint32()) {
218		2	return static_cast<uid_t>(value.As<Uint32>()->Value());
219			} else {
220		8	Utf8Value name(isolate, value);
221		4	return uid_by_name(*name);
222			}
223			}
224
225		7	static gid_t gid_by_name(Isolate* isolate, Local<Value> value) {
226	✓✓	7	if (value->IsUint32()) {
227		3	return static_cast<gid_t>(value.As<Uint32>()->Value());
228			} else {
229		8	Utf8Value name(isolate, value);
230		4	return gid_by_name(*name);
231			}
232			}
233
234		253	static void GetUid(const FunctionCallbackInfo<Value>& args) {
235		253	Environment* env = Environment::GetCurrent(args);
236	✗✓	253	CHECK(env->has_run_bootstrapping_code());
237			// uid_t is an uint32_t on all supported platforms.
238		253	args.GetReturnValue().Set(static_cast<uint32_t>(getuid()));
239		253	}
240
241		116	static void GetGid(const FunctionCallbackInfo<Value>& args) {
242		116	Environment* env = Environment::GetCurrent(args);
243	✗✓	116	CHECK(env->has_run_bootstrapping_code());
244			// gid_t is an uint32_t on all supported platforms.
245		116	args.GetReturnValue().Set(static_cast<uint32_t>(getgid()));
246		116	}
247
248		2	static void GetEUid(const FunctionCallbackInfo<Value>& args) {
249		2	Environment* env = Environment::GetCurrent(args);
250	✗✓	2	CHECK(env->has_run_bootstrapping_code());
251			// uid_t is an uint32_t on all supported platforms.
252		2	args.GetReturnValue().Set(static_cast<uint32_t>(geteuid()));
253		2	}
254
255		2	static void GetEGid(const FunctionCallbackInfo<Value>& args) {
256		2	Environment* env = Environment::GetCurrent(args);
257	✗✓	2	CHECK(env->has_run_bootstrapping_code());
258			// gid_t is an uint32_t on all supported platforms.
259		2	args.GetReturnValue().Set(static_cast<uint32_t>(getegid()));
260		2	}
261
262		2	static void SetGid(const FunctionCallbackInfo<Value>& args) {
263		2	Environment* env = Environment::GetCurrent(args);
264	✗✓	2	CHECK(env->owns_process_state());
265
266	✗✓	2	CHECK_EQ(args.Length(), 1);
267	✓✓✗✓ ✗✓	4	CHECK(args[0]->IsUint32() \|\| args[0]->IsString());
268
269		2	gid_t gid = gid_by_name(env->isolate(), args[0]);
270
271	✓✓	2	if (gid == gid_not_found) {
272			// Tells JS to throw ERR_INVALID_CREDENTIAL
273		2	args.GetReturnValue().Set(1);
274	✓✗	1	} else if (setgid(gid)) {
275		1	env->ThrowErrnoException(errno, "setgid");
276			} else {
277			args.GetReturnValue().Set(0);
278			}
279		2	}
280
281		2	static void SetEGid(const FunctionCallbackInfo<Value>& args) {
282		2	Environment* env = Environment::GetCurrent(args);
283	✗✓	2	CHECK(env->owns_process_state());
284
285	✗✓	2	CHECK_EQ(args.Length(), 1);
286	✓✓✗✓ ✗✓	4	CHECK(args[0]->IsUint32() \|\| args[0]->IsString());
287
288		2	gid_t gid = gid_by_name(env->isolate(), args[0]);
289
290	✓✓	2	if (gid == gid_not_found) {
291			// Tells JS to throw ERR_INVALID_CREDENTIAL
292		2	args.GetReturnValue().Set(1);
293	✓✗	1	} else if (setegid(gid)) {
294		1	env->ThrowErrnoException(errno, "setegid");
295			} else {
296			args.GetReturnValue().Set(0);
297			}
298		2	}
299
300		3	static void SetUid(const FunctionCallbackInfo<Value>& args) {
301		3	Environment* env = Environment::GetCurrent(args);
302	✗✓	3	CHECK(env->owns_process_state());
303
304	✗✓	3	CHECK_EQ(args.Length(), 1);
305	✓✓✗✓ ✗✓	7	CHECK(args[0]->IsUint32() \|\| args[0]->IsString());
306
307		3	uid_t uid = uid_by_name(env->isolate(), args[0]);
308
309	✓✓	3	if (uid == uid_not_found) {
310			// Tells JS to throw ERR_INVALID_CREDENTIAL
311		2	args.GetReturnValue().Set(1);
312	✓✗	2	} else if (setuid(uid)) {
313		2	env->ThrowErrnoException(errno, "setuid");
314			} else {
315			args.GetReturnValue().Set(0);
316			}
317		3	}
318
319		3	static void SetEUid(const FunctionCallbackInfo<Value>& args) {
320		3	Environment* env = Environment::GetCurrent(args);
321	✗✓	3	CHECK(env->owns_process_state());
322
323	✗✓	3	CHECK_EQ(args.Length(), 1);
324	✓✓✗✓ ✗✓	7	CHECK(args[0]->IsUint32() \|\| args[0]->IsString());
325
326		3	uid_t uid = uid_by_name(env->isolate(), args[0]);
327
328	✓✓	3	if (uid == uid_not_found) {
329			// Tells JS to throw ERR_INVALID_CREDENTIAL
330		2	args.GetReturnValue().Set(1);
331	✓✗	2	} else if (seteuid(uid)) {
332		2	env->ThrowErrnoException(errno, "seteuid");
333			} else {
334			args.GetReturnValue().Set(0);
335			}
336		3	}
337
338		2	static void GetGroups(const FunctionCallbackInfo<Value>& args) {
339		2	Environment* env = Environment::GetCurrent(args);
340	✗✓	2	CHECK(env->has_run_bootstrapping_code());
341
342		2	int ngroups = getgroups(0, nullptr);
343	✗✓	2	if (ngroups == -1) return env->ThrowErrnoException(errno, "getgroups");
344
345		2	std::vector<gid_t> groups(ngroups);
346
347		2	ngroups = getgroups(ngroups, groups.data());
348	✗✓	2	if (ngroups == -1)
349			return env->ThrowErrnoException(errno, "getgroups");
350
351		2	groups.resize(ngroups);
352		2	gid_t egid = getegid();
353	✗✓	2	if (std::find(groups.begin(), groups.end(), egid) == groups.end())
354			groups.push_back(egid);
355		2	MaybeLocal<Value> array = ToV8Value(env->context(), groups);
356	✓✗	2	if (!array.IsEmpty())
357	✗✓	4	args.GetReturnValue().Set(array.ToLocalChecked());
358			}
359
360		1	static void SetGroups(const FunctionCallbackInfo<Value>& args) {
361		1	Environment* env = Environment::GetCurrent(args);
362
363	✗✓	1	CHECK_EQ(args.Length(), 1);
364	✗✓	1	CHECK(args[0]->IsArray());
365
366		2	Local<Array> groups_list = args[0].As<Array>();
367		1	size_t size = groups_list->Length();
368		1	MaybeStackBuffer<gid_t, 64> groups(size);
369
370	✓✗	2	for (size_t i = 0; i < size; i++) {
371		2	gid_t gid = gid_by_name(
372		2	env->isolate(), groups_list->Get(env->context(), i).ToLocalChecked());
373
374	✓✓	2	if (gid == gid_not_found) {
375			// Tells JS to throw ERR_INVALID_CREDENTIAL
376	✓✗	1	args.GetReturnValue().Set(static_cast<uint32_t>(i + 1));
377		1	return;
378			}
379
380		1	groups[i] = gid;
381			}
382
383			int rc = setgroups(size, *groups);
384
385			if (rc == -1) return env->ThrowErrnoException(errno, "setgroups");
386
387			args.GetReturnValue().Set(0);
388			}
389
390		1	static void InitGroups(const FunctionCallbackInfo<Value>& args) {
391		1	Environment* env = Environment::GetCurrent(args);
392
393	✗✓	1	CHECK_EQ(args.Length(), 2);
394	✓✗✗✓ ✗✓	3	CHECK(args[0]->IsUint32() \|\| args[0]->IsString());
395	✓✗✗✓ ✗✓	3	CHECK(args[1]->IsUint32() \|\| args[1]->IsString());
396
397		1	Utf8Value arg0(env->isolate(), args[0]);
398			gid_t extra_group;
399			bool must_free;
400			char* user;
401
402	✗✓	1	if (args[0]->IsUint32()) {
403			user = name_by_uid(args[0].As<Uint32>()->Value());
404			must_free = true;
405			} else {
406		1	user = *arg0;
407		1	must_free = false;
408			}
409
410	✗✓	1	if (user == nullptr) {
411			// Tells JS to throw ERR_INVALID_CREDENTIAL
412			return args.GetReturnValue().Set(1);
413			}
414
415		1	extra_group = gid_by_name(env->isolate(), args[1]);
416
417	✓✗	1	if (extra_group == gid_not_found) {
418	✗✓	1	if (must_free) free(user);
419			// Tells JS to throw ERR_INVALID_CREDENTIAL
420		2	return args.GetReturnValue().Set(2);
421			}
422
423			int rc = initgroups(user, extra_group);
424
425			if (must_free) free(user);
426
427			if (rc) return env->ThrowErrnoException(errno, "initgroups");
428
429			args.GetReturnValue().Set(0);
430			}
431
432			#endif // NODE_IMPLEMENTS_POSIX_CREDENTIALS
433
434		5473	void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
435		5473	registry->Register(SafeGetenv);
436
437			#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
438		5473	registry->Register(GetUid);
439		5473	registry->Register(GetEUid);
440		5473	registry->Register(GetGid);
441		5473	registry->Register(GetEGid);
442		5473	registry->Register(GetGroups);
443
444		5473	registry->Register(InitGroups);
445		5473	registry->Register(SetEGid);
446		5473	registry->Register(SetEUid);
447		5473	registry->Register(SetGid);
448		5473	registry->Register(SetUid);
449		5473	registry->Register(SetGroups);
450			#endif // NODE_IMPLEMENTS_POSIX_CREDENTIALS
451		5473	}
452
453		780	static void Initialize(Local<Object> target,
454			Local<Value> unused,
455			Local<Context> context,
456			void* priv) {
457		780	Environment* env = Environment::GetCurrent(context);
458		780	Isolate* isolate = env->isolate();
459
460		780	SetMethod(context, target, "safeGetenv", SafeGetenv);
461
462			#ifdef NODE_IMPLEMENTS_POSIX_CREDENTIALS
463		2340	READONLY_TRUE_PROPERTY(target, "implementsPosixCredentials");
464		780	SetMethodNoSideEffect(context, target, "getuid", GetUid);
465		780	SetMethodNoSideEffect(context, target, "geteuid", GetEUid);
466		780	SetMethodNoSideEffect(context, target, "getgid", GetGid);
467		780	SetMethodNoSideEffect(context, target, "getegid", GetEGid);
468		780	SetMethodNoSideEffect(context, target, "getgroups", GetGroups);
469
470	✓✓	780	if (env->owns_process_state()) {
471		57	SetMethod(context, target, "initgroups", InitGroups);
472		57	SetMethod(context, target, "setegid", SetEGid);
473		57	SetMethod(context, target, "seteuid", SetEUid);
474		57	SetMethod(context, target, "setgid", SetGid);
475		57	SetMethod(context, target, "setuid", SetUid);
476		57	SetMethod(context, target, "setgroups", SetGroups);
477			}
478			#endif // NODE_IMPLEMENTS_POSIX_CREDENTIALS
479		780	}
480
481			} // namespace credentials
482			} // namespace node
483
484		5545	NODE_MODULE_CONTEXT_AWARE_INTERNAL(credentials, node::credentials::Initialize)
485		5473	NODE_MODULE_EXTERNAL_REFERENCE(credentials,
486			node::credentials::RegisterExternalReferences)