* Added useradd and passwd tools. They allow adding new users and

changing a user's password, like on other platforms (just a bit more
  bare-bones :-)).
* Moved login from src/bin/network/login/ to src/bin/multiuser/.
* login correctly checks the shadow password now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25041 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/bin/Jamfile

@@ -181,6 +181,7 @@ SubInclude HAIKU_TOP src bin make ;
 SubInclude HAIKU_TOP src bin makebootable ;
 #SubInclude HAIKU_TOP src bin makeudfimage ;
 SubInclude HAIKU_TOP src bin mkdos ;
+SubInclude HAIKU_TOP src bin multiuser ;
 SubInclude HAIKU_TOP src bin patch ;
 SubInclude HAIKU_TOP src bin pc ;
 SubInclude HAIKU_TOP src bin pcmcia-cs ;

src/bin/multiuser/Jamfile

@@ -0,0 +1,17 @@
+SubDir HAIKU_TOP src bin multiuser ;
+
+UsePrivateKernelHeaders ;
+UsePrivateHeaders app ;
+UsePrivateHeaders libroot ;
+UsePrivateHeaders shared ;
+
+StaticLibrary libmultiuser_utils.a : multiuser_utils.cpp ;
+
+BinCommand login : login.cpp : libmultiuser_utils.a ;
+
+BinCommand passwd : passwd.cpp : libmultiuser_utils.a ;
+
+BinCommand useradd : useradd.cpp : libmultiuser_utils.a ;
+
+# set set-uid bit on passwd
+MODE on passwd = 04755 ;

src/bin/multiuser/login.cpp

@@ -19,6 +19,8 @@
 #include <termios.h>
 #include <unistd.h>
 
+#include "multiuser_utils.h"
+
 
 extern const char* __progname;
 const char* kProgramName = __progname;
@@ -118,11 +120,12 @@ login(const char* user, struct passwd** _passwd)
 		return status;
 
 	struct passwd* passwd = getpwnam(user);
-	if (passwd == NULL || passwd->pw_passwd == NULL)
+	struct spwd* spwd = getspnam(user);
-		return B_ERROR;
 
-	// TODO: do a real password check!
+	bool ok = verify_password(passwd, spwd, password);
-	if (strcmp(password, passwd->pw_passwd))
+	memset(password, 0, sizeof(password));
+
+	if (!ok)
 		return B_PERMISSION_DENIED;
 
 	*_passwd = passwd;

src/bin/multiuser/multiuser_utils.cpp

@@ -0,0 +1,167 @@
+/*
+ * Copyright 2008, Ingo Weinhold, [email protected]. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include "multiuser_utils.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <AutoDeleter.h>
+
+#include <user_group.h>
+
+
+status_t
+read_password(const char* prompt, char* password, size_t bufferSize,
+	bool useStdio)
+{
+	FILE* in = stdin;
+	FILE* out = stdout;
+
+	// open tty
+	FILE* tty = NULL;
+	if (!useStdio) {
+// TODO: Open tty with O_NOCTTY!
+		tty = fopen("/dev/tty", "w+");
+		if (tty == NULL) {
+			fprintf(stderr, "Error: Failed to open tty: %s\n", strerror(errno));
+			return errno;
+		}
+
+		in = tty;
+		out = tty;
+	}
+	CObjectDeleter<FILE, int> ttyCloser(tty, fclose);
+
+	// disable echo
+	int inFD = fileno(in);
+	struct termios termAttrs;
+	if (tcgetattr(inFD, &termAttrs) != 0) {
+		fprintf(in, "Error: Failed to get tty attributes: %s\n",
+			strerror(errno));
+		return errno;
+	}
+
+	tcflag_t localFlags = termAttrs.c_lflag;
+	termAttrs.c_lflag &= ~ECHO;
+
+	if (tcsetattr(inFD, TCSANOW, &termAttrs) != 0) {
+		fprintf(in, "Error: Failed to set tty attributes: %s\n",
+			strerror(errno));
+		return errno;
+	}
+
+	status_t error = B_OK;
+
+	// prompt and read pwd
+	fprintf(out, prompt);
+	fflush(out);
+
+	if (fgets(password, bufferSize, in) == NULL) {
+		fprintf(out, "\nError: Failed to read from tty: %s\n", strerror(errno));
+		error = errno != 0 ? errno : B_ERROR;
+	} else
+		fputc('\n', out);
+
+	// chop off trailing newline
+	if (error == B_OK) {
+		size_t len = strlen(password);
+		if (len > 0 && password[len - 1] == '\n')
+			password[len - 1] = '\0';
+	}
+
+	// restore the terminal attributes
+	termAttrs.c_lflag = localFlags;
+	tcsetattr(inFD, TCSANOW, &termAttrs);
+
+	return error;
+}
+
+
+bool
+verify_password(passwd* passwd, spwd* spwd, const char* plainPassword)
+{
+	if (passwd == NULL)
+		return false;
+
+	// check whether we need to check the shadow password
+	const char* requiredPassword = passwd->pw_passwd;
+	if (strcmp(requiredPassword, "x") == 0) {
+		if (spwd == NULL) {
+			// Mmh, we're suppose to check the shadow password, but we don't
+			// have it. Bail out.
+			return false;
+		}
+
+		requiredPassword = spwd->sp_pwdp;
+	}
+
+	// If no password is required, we're done.
+	if (requiredPassword == NULL || strlen(requiredPassword) == 0)
+		return true;
+
+	// crypt and check it
+	char* encryptedPassword = crypt(plainPassword, requiredPassword);
+
+	return (strcmp(encryptedPassword, requiredPassword) == 0);
+}
+
+
+/*!	Checks whether the user needs to authenticate with a password, and, if
+	necessary, asks for it, and checks it.
+	\a passwd must always be given, \a spwd only if there exists an entry
+	for the user.
+*/
+status_t
+authenticate_user(const char* prompt, passwd* passwd, spwd* spwd, int maxTries,
+	bool useStdio)
+{
+	// check whether a password is need at all
+	if (verify_password(passwd, spwd, ""))
+		return B_OK;
+
+	while (true) {
+		// prompt the user for the password
+		char plainPassword[MAX_SHADOW_PWD_PASSWORD_LEN];
+		status_t error = read_password(prompt, plainPassword,
+			sizeof(plainPassword), useStdio);
+		if (error != B_OK)
+			return error;
+
+		// check it
+		bool ok = verify_password(passwd, spwd, plainPassword);
+		memset(plainPassword, 0, sizeof(plainPassword));
+		if (ok)
+			return B_OK;
+
+		fprintf(stderr, "Incorrect password.\n");
+		if (--maxTries <= 0)
+			return B_PERMISSION_DENIED;
+	}
+}
+
+
+status_t
+authenticate_user(const char* prompt, const char* user, passwd** _passwd,
+	spwd** _spwd, int maxTries, bool useStdio)
+{
+	struct passwd* passwd = getpwnam(user);
+	struct spwd* spwd = getspnam(user);
+
+	status_t error = authenticate_user(prompt, passwd, spwd, maxTries,
+		useStdio);
+	if (error == B_OK) {
+		if (_passwd)
+			*_passwd = passwd;
+		if (_spwd)
+			*_spwd = spwd;
+	}
+
+	return error;
+}

src/bin/multiuser/multiuser_utils.h

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2008, Ingo Weinhold, [email protected]. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef MULTIUSER_UTILS_H
+#define MULTIUSER_UTILS_H
+
+#include <pwd.h>
+#include <shadow.h>
+#include <stdio.h>
+
+#include <SupportDefs.h>
+
+
+status_t read_password(const char* prompt, char* password, size_t bufferSize,
+			bool useStdio);
+
+bool verify_password(passwd* passwd, spwd* spwd, const char* plainPassword);
+
+status_t authenticate_user(const char* prompt, passwd* passwd, spwd* spwd,
+			int maxTries, bool useStdio);
+status_t authenticate_user(const char* prompt, const char* user,
+			passwd** _passwd, spwd** _spwd, int maxTries, bool useStdio);
+
+
+#endif	// MULTIUSER_UTILS_H

src/bin/multiuser/passwd.cpp

@@ -0,0 +1,145 @@
+/*
+ * Copyright 2008, Ingo Weinhold, [email protected]. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <errno.h>
+#include <pwd.h>
+#include <shadow.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <OS.h>
+
+#include <RegistrarDefs.h>
+#include <user_group.h>
+#include <util/KMessage.h>
+
+#include <AutoDeleter.h>
+
+#include "multiuser_utils.h"
+
+
+extern const char *__progname;
+
+
+static const char* kUsage =
+"Usage: %s [ <user name> ]\n"
+;
+
+static void
+print_usage_and_exit(bool error)
+{
+	fprintf(error ? stderr : stdout, kUsage, __progname);
+	exit(error ? 1 : 0);
+}
+
+
+int
+main(int argc, const char* const* argv)
+{
+	if (argc > 2)
+		print_usage_and_exit(true);
+
+	const char* user = NULL;
+	if (argc == 2)
+		user = argv[1];
+
+	if (geteuid() != 0) {
+		fprintf(stderr, "Error: You need to be root.\n");
+		exit(1);
+	}
+
+	// this is a set-uid tool -- get the real UID
+	uid_t uid = getuid();
+
+	// get the passwd entry
+	struct passwd* passwd;
+	if (user != NULL) {
+		passwd = getpwnam(user);
+		if (passwd == NULL) {
+			fprintf(stderr, "Error: No user with name \"%s\".\n", user);
+			exit(1);
+		}
+
+		if (uid != 0 && passwd->pw_uid != uid) {
+			fprintf(stderr, "Error: Only root can change the passwd for other "
+				"users.\n");
+			exit(1);
+		}
+	} else {
+		passwd = getpwuid(uid);
+		if (passwd == NULL) {
+			fprintf(stderr, "Error: Ugh! Couldn't get passwd entry for uid "
+				"%d.\n", uid);
+			exit(1);
+		}
+
+		user = passwd->pw_name;
+	}
+
+	// if not root, the user needs to authenticate
+	if (uid != 0) {
+		if (authenticate_user("old password: ", passwd, getspnam(user), 1,
+				false) != B_OK) {
+			exit(1);
+		}
+	}
+
+	// read new password
+	char password[LINE_MAX];
+	if (read_password("new password: ", password, sizeof(password), false)
+			!= B_OK) {
+		exit(1);
+	}
+
+	if (strlen(password) >= MAX_SHADOW_PWD_PASSWORD_LEN) {
+		fprintf(stderr, "Error: The password is too long.\n");
+		exit(1);
+	}
+
+	// read password again
+	char repeatedPassword[LINE_MAX];
+	if (read_password("repeat new password: ", repeatedPassword,
+			sizeof(repeatedPassword), false) != B_OK) {
+		exit(1);
+	}
+
+	// passwords need to match
+	if (strcmp(password, repeatedPassword) != 0) {
+		fprintf(stderr, "Error: passwords don't match\n");
+		exit(1);
+	}
+
+	memset(repeatedPassword, 0, sizeof(repeatedPassword));
+
+	// crypt it
+	char* encryptedPassword;
+	if (strlen(password) > 0) {
+		encryptedPassword = crypt(password, user);
+		memset(password, 0, sizeof(password));
+	} else
+		encryptedPassword = password;
+
+	// prepare request for the registrar
+	KMessage message(BPrivate::B_REG_UPDATE_USER);
+	if (message.AddInt32("uid", passwd->pw_uid) != B_OK
+		|| message.AddString("password", "x") != B_OK
+		|| message.AddString("shadow password", encryptedPassword) != B_OK) {
+		fprintf(stderr, "Error: Out of memory!\n");
+		exit(1);
+	}
+
+	// send the request
+	KMessage reply;
+	status_t error = send_authentication_request_to_registrar(message, reply);
+	if (error != B_OK) {
+		fprintf(stderr, "Error: Failed to create user: %s\n", strerror(error));
+		exit(1);
+	}
+
+	return 0;
+}

src/bin/multiuser/useradd.cpp

@@ -0,0 +1,192 @@
+/*
+ * Copyright 2008, Ingo Weinhold, [email protected]. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include <errno.h>
+#include <getopt.h>
+#include <pwd.h>
+#include <shadow.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <OS.h>
+#include <parsedate.h>
+
+#include <RegistrarDefs.h>
+#include <user_group.h>
+#include <util/KMessage.h>
+
+#include <AutoDeleter.h>
+
+#include "multiuser_utils.h"
+
+
+extern const char *__progname;
+
+
+static const char* kUsage =
+"Usage: %s [ -d <home> ] [ -e <expiration> ] [ -f <inactive> ] [ -g <gid> ]\n"
+"          [ -s <shell> ] [ -n <real name> ]\n"
+;
+
+static void
+print_usage_and_exit(bool error)
+{
+	fprintf(error ? stderr : stdout, kUsage, __progname);
+	exit(error ? 1 : 0);
+}
+
+
+int
+main(int argc, const char* const* argv)
+{
+	const char* home = "/boot/home";
+	int expiration = 99999;
+	int inactive = -1;
+	gid_t gid = 100;
+	const char* shell = "/bin/sh";
+	const char* realName = "";
+
+	int min = -1;
+	int max = -1;
+	int warn = 7;
+
+	while (true) {
+		static struct option sLongOptions[] = {
+			{ "help", no_argument, 0, 'h' },
+			{ 0, 0, 0, 0 }
+		};
+
+		opterr = 0; // don't print errors
+		int c = getopt_long(argc, (char**)argv, "d:e:f:g:hn:s:", sLongOptions,
+			NULL);
+		if (c == -1)
+			break;
+
+	
+		switch (c) {
+			case 'd':
+				home = optarg;
+				break;
+
+			case 'e':
+				expiration = parsedate(optarg, time(NULL)) / (3600 * 24);
+				break;
+
+			case 'f':
+				inactive = atoi(optarg);
+				break;
+
+			case 'g':
+				gid = atoi(optarg);
+				break;
+
+			case 'h':
+				print_usage_and_exit(false);
+				break;
+
+			case 'n':
+				realName = optarg;
+				break;
+
+			case 's':
+				shell = optarg;
+				break;
+
+			default:
+				print_usage_and_exit(true);
+				break;
+		}
+	}
+
+	if (optind != argc - 1)
+		print_usage_and_exit(true);
+
+	const char* user = argv[optind];
+
+	if (geteuid() != 0) {
+		fprintf(stderr, "Error: You need to be root.\n");
+		exit(1);
+	}
+
+	// check, if user already exists
+	if (getpwnam(user) != NULL) {
+		fprintf(stderr, "Error: User \"%s\" already exists.\n", user);
+		exit(1);
+	}
+
+	// read password
+	char password[LINE_MAX];
+	if (read_password("password for user: ", password, sizeof(password),
+			false) != B_OK) {
+		exit(1);
+	}
+
+	if (strlen(password) >= MAX_SHADOW_PWD_PASSWORD_LEN) {
+		fprintf(stderr, "Error: The password is too long.\n");
+		exit(1);
+	}
+
+	// read password again
+	char repeatedPassword[LINE_MAX];
+	if (read_password("repeat password: ", repeatedPassword,
+			sizeof(repeatedPassword), false) != B_OK) {
+		exit(1);
+	}
+
+	// passwords need to match
+	if (strcmp(password, repeatedPassword) != 0) {
+		fprintf(stderr, "Error: passwords don't match\n");
+		exit(1);
+	}
+
+	memset(repeatedPassword, 0, sizeof(repeatedPassword));
+
+	// crypt it
+	char* encryptedPassword;
+	if (strlen(password) > 0) {
+		encryptedPassword = crypt(password, user);
+		memset(password, 0, sizeof(password));
+	} else
+		encryptedPassword = password;
+
+	// find an unused UID
+	uid_t uid = 1000;
+	while (getpwuid(uid) != NULL)
+		uid++;
+
+	// prepare request for the registrar
+	KMessage message(BPrivate::B_REG_UPDATE_USER);
+	if (message.AddInt32("uid", uid) != B_OK
+		|| message.AddInt32("gid", gid) != B_OK
+		|| message.AddString("name", user) != B_OK
+		|| message.AddString("password", "x") != B_OK
+		|| message.AddString("home", home) != B_OK
+		|| message.AddString("shell", shell) != B_OK
+		|| message.AddString("real name", realName) != B_OK
+		|| message.AddString("shadow password", encryptedPassword) != B_OK
+		|| message.AddInt32("min", min) != B_OK
+		|| message.AddInt32("max", max) != B_OK
+		|| message.AddInt32("warn", warn) != B_OK
+		|| message.AddInt32("inactive", inactive) != B_OK
+		|| message.AddInt32("expiration", expiration) != B_OK
+		|| message.AddInt32("flags", 0) != B_OK
+		|| message.AddBool("add user", true) != B_OK) {
+		fprintf(stderr, "Error: Out of memory!\n");
+		exit(1);
+	}
+
+	// send the request
+	KMessage reply;
+	status_t error = send_authentication_request_to_registrar(message, reply);
+	if (error != B_OK) {
+		fprintf(stderr, "Error: Failed to create user: %s\n", strerror(error));
+		exit(1);
+	}
+
+	return 0;
+}

src/bin/network/Jamfile

@@ -5,7 +5,6 @@ SubInclude HAIKU_TOP src bin network atftpd ;
 SubInclude HAIKU_TOP src bin network ftp ;
 SubInclude HAIKU_TOP src bin network ftpd ;
 SubInclude HAIKU_TOP src bin network ifconfig ;
-SubInclude HAIKU_TOP src bin network login ;
 SubInclude HAIKU_TOP src bin network mount_nfs ;
 SubInclude HAIKU_TOP src bin network nc ;
 SubInclude HAIKU_TOP src bin network netstat ;

src/bin/network/login/Jamfile

@@ -1,5 +0,0 @@
-SubDir HAIKU_TOP src bin network login ;
-
-BinCommand login :
-	login.cpp
-;