repos/CCSAdmin/adduser.c

// Douglas Thrift
//
// CCS Computer Science
//
// Add User

#include <sys/resource.h>
#include <sys/time.h>
#include <sys/types.h>

#include "common.h"

int main(int argc, char *argv[])
{
        if (argc < 1)
                return 1;
        
        int exception;
        jmp_buf environment;

        switch (exception = setjmp(environment))
        {
        case 0:
                break;
        case 1:
                perror(argv[0]);

                return 1;
        default:
                fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);

                return 1;
        }

#ifdef _Zweihander_
        regex_t user_, name_;

        regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
        regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);

        char user[MAXLOGNAME] = "", *name = NULL;

        for (int index = 1; index != argc; ++index)
        {
                regmatch_t match[2];

                if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
                        strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
                else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
                        name = argv[index] + match[1].rm_so;
                else
                {
                        printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);

                        return 1;
                }
        }

        regfree(&user_);
        regfree(&name_);
        authenticate(argv[0], environment);

        if (!strlen(user))
        {
                regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);

                do
                {
                        printf("User Name: ");

                        size_t size;
                        char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);

                        strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
                }
                while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment));

                regfree(&user_);
        }

        if (!name)
        {
                regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
                get("Full Name", &name_, &name, environment);
                regfree(&name_);
        }

        char password[_PASSWORD_LEN];

        getpassword(password, environment);
        check(setuid(geteuid()), environment);

        char slappasswd[] = "/tmp/slappasswd.XXXXXX";

        putpassword(password, slappasswd, environment);

        int pipe_[2];

        check(pipe(pipe_), environment);

        pid_t bash;

        if (!(bash = check(fork(), environment)))
        {
                check(dup2(pipe_[0], 0), environment);
                check(close(pipe_[1]), environment);
                check(setenv("USER", user, 1), environment);
                check(setenv("NAME", name, 1), environment);
                check(setenv("FILE", slappasswd, 1), environment);
                check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
        }

        check(close(pipe_[0]), environment);

        FILE *smbpasswd = fdopen(pipe_[1], "w");

        if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
                longjmp(environment, 1);

        if (fclose(smbpasswd))
                longjmp(environment, 1);

        int status;

        check(waitpid(bash, &status, 0), environment);
        check(unlink(slappasswd), environment);

        if (WEXITSTATUS(status))
                return 1;

        struct passwd *entry = getpwnam(user);

        if (!entry)
                longjmp(environment, 1);

        check(mkdir(entry->pw_dir, 0755), environment);
        check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
#else
        longjmp(environment, (int)"Log in to zweihander.ccs.ucsb.edu to add users");
#endif

        return 0;
}
Revision:	564
Committed:	2005-08-28T03:22:30-07:00 (19 years, 9 months ago) by douglas
Content type:	text/x-c
File size:	3096 byte(s)
Log Message:	Security, eh!
#	User	Rev	Content
1	douglas	562	// Douglas Thrift
2			//
3			// CCS Computer Science
4			//
5			// Add User
6
7			#include <sys/resource.h>
8			#include <sys/time.h>
9			#include <sys/types.h>
10
11			#include "common.h"
12
13			int main(int argc, char *argv[])
14			{
15	douglas	564	if (argc < 1)
16			return 1;
17
18	douglas	562	int exception;
19			jmp_buf environment;
20
21			switch (exception = setjmp(environment))
22			{
23			case 0:
24			break;
25			case 1:
26			perror(argv[0]);
27
28			return 1;
29			default:
30			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
31
32			return 1;
33			}
34
35			#ifdef _Zweihander_
36			regex_t user_, name_;
37
38			regcheck(regcomp(&user_, "^-user=([a-z0-9]{1,16})$", REG_EXTENDED), &user_, environment);
39			regcheck(regcomp(&name_, "^-name=([^:]+)$", REG_EXTENDED), &name_, environment);
40
41			char user[MAXLOGNAME] = "", *name = NULL;
42	douglas	564
43	douglas	562	for (int index = 1; index != argc; ++index)
44			{
45			regmatch_t match[2];
46
47			if (!regcheck(regexec(&user_, argv[index], 2, match, 0), &user_, environment))
48			strlcpy(user, argv[index] + match[1].rm_so, match[1].rm_eo - match[1].rm_so + 1);
49			else if (!regcheck(regexec(&name_, argv[index], 2, match, 0), &name_, environment))
50			name = argv[index] + match[1].rm_so;
51			else
52			{
53			printf("Usage: %s [-user=user] [-name=name]\n", argv[0]);
54
55			return 1;
56			}
57			}
58
59			regfree(&user_);
60			regfree(&name_);
61			authenticate(argv[0], environment);
62
63			if (!strlen(user))
64			{
65			regcheck(regcomp(&user_, "^[a-z0-9]{1,16}$", REG_EXTENDED), &user_, environment);
66
67			do
68			{
69			printf("User Name: ");
70
71			size_t size;
72			char *user_ = fcheck(fgetln(stdin, &size), stdin, environment);
73
74			strlcpy(user, user_, size < sizeof (user) ? size : sizeof (user));
75			}
76			while (regcheck(regexec(&user_, user, 0, NULL, 0), &user_, environment));
77
78			regfree(&user_);
79			}
80
81			if (!name)
82			{
83			regcheck(regcomp(&name_, "^[^:]+$", REG_EXTENDED), &name_, environment);
84	douglas	563	get("Full Name", &name_, &name, environment);
85	douglas	562	regfree(&name_);
86			}
87
88			char password[_PASSWORD_LEN];
89
90			getpassword(password, environment);
91			check(setuid(geteuid()), environment);
92
93			char slappasswd[] = "/tmp/slappasswd.XXXXXX";
94
95			putpassword(password, slappasswd, environment);
96
97			int pipe_[2];
98
99			check(pipe(pipe_), environment);
100
101			pid_t bash;
102
103			if (!(bash = check(fork(), environment)))
104			{
105			check(dup2(pipe_[0], 0), environment);
106			check(close(pipe_[1]), environment);
107			check(setenv("USER", user, 1), environment);
108			check(setenv("NAME", name, 1), environment);
109			check(setenv("FILE", slappasswd, 1), environment);
110			check(execl("/ccs/bin/adduser.sh", argv[0], NULL), environment);
111			}
112
113			check(close(pipe_[0]), environment);
114
115			FILE *smbpasswd = fdopen(pipe_[1], "w");
116
117			if (fprintf(smbpasswd, "%s\n%s\n", password, password) < 0)
118			longjmp(environment, 1);
119
120			if (fclose(smbpasswd))
121			longjmp(environment, 1);
122
123			int status;
124
125			check(waitpid(bash, &status, 0), environment);
126			check(unlink(slappasswd), environment);
127
128			if (WEXITSTATUS(status))
129			return 1;
130
131			struct passwd *entry = getpwnam(user);
132
133			if (!entry)
134			longjmp(environment, 1);
135
136			check(mkdir(entry->pw_dir, 0755), environment);
137			check(chown(entry->pw_dir, entry->pw_uid, entry->pw_gid), environment);
138			#else
139			longjmp(environment, (int)"Log in to zweihander.ccs.ucsb.edu to add users");
140			#endif
141
142			return 0;
143			}