imapfilter/imapfilter/file.c

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <regex.h>
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>

#include "config.h"
#include "imapfilter.h"
#include "data.h"


extern char logfile[PATH_MAX];
extern unsigned int options;
extern unsigned int flags;
extern unsigned int interval;
extern long timeout;
extern char *home;

#ifdef ENCRYPTED_PASSWORDS
char *passphr;                  /* Master password to access the
                                   passwords file. */
#endif


/*
 * Find the path to configuration file, open it and call parse_config().
 */
int read_config(char *cfg)
{
    int r;
    FILE *fd;
    char *c = NULL;

    if (!cfg) {
        cfg = c = (char *) xmalloc(PATH_MAX * sizeof(char));
        snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
    }

#ifdef DEBUG
    printf("debug: configuration file: '%s'\n", cfg);
#endif
#ifdef CHECK_PERMISSIONS
    check_file_perms(cfg, S_IRUSR | S_IWUSR);
#endif
    fd = fopen(cfg, "r");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n",
              cfg, strerror(errno));

    if (c)
        xfree(c);

    if ((r = parse_config(fd)))
        fatal(ERROR_CONFIG_PARSE,
              "imapfilter: parse error in config file at row %d\n", r);

    fclose(fd);

#ifdef DEBUG
    printf("debug: options: %0#10x\n", options);
#endif

    return 0;
}


/*
 * Parse configuration file.
 */
int parse_config(FILE * fd)
{
    int i, r = 0;
    unsigned int row = 0;
    char line[LINE_MAX];
    regex_t creg[13];
    regmatch_t match[9];
    const char *reg[13] = {
        "^([[:blank:]]*\n|#.*\n)$",

        "^[[:blank:]]*ACCOUNT[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
        "(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@([[:alnum:].-]+)"
        "(:[[:digit:]]+)?[[:blank:]]*([[:blank:]]SSL|[[:blank:]]SSL2|"
        "[[:blank:]]SSL3|[[:blank:]]TLS1)?[[:blank:]]*\n$",

        "^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
        "([[:print:]]+)[[:blank:]]*\n$",

        "^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*"
        "([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$",

        "^[[:blank:]]*ACTION[[:blank:]]+(DELETE|"
        "COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|"
        "MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|"
        "RCOPY[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
        "(\"[[:print:]]*\"|[[:graph:]]+)|"
        "RMOVE[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
        "(\"[[:print:]]*\"|[[:graph:]]+)|"
        "LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$",

        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
        "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
        "(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|UNANSWERED|"
        "UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$",

        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
        "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
        "(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+(\"[[:print:]]*\"|"
        "[[:graph:]]+)[[:blank:]]*\n$",

        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
        "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
        "(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]+"
        "(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$",

        "^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|"
        "AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*"
        "(LARGER|SMALLER|OLDER|NEWER)[[:blank:]]+([[:digit:]]+)"
        "[[:blank:]]*\n$",

        "^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+"
        "([[:alnum:],_-]+)[[:blank:]]*\n$",

        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(LOGFILE)"
        "[[:blank:]]*=[[:blank:]]*([[:print:]]+)\n$",

        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(HEADERS|NAMESPACE)"
        "[[:blank:]]*=[[:blank:]]*(YES|NO)[[:blank:]]*\n$",

        "^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(DAEMON|TIMEOUT)"
        "[[:blank:]]*=[[:blank:]]*([[:digit:]]+)\n$"
    };

    for (i = 0; i < 13; i++)
        regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE);

    while (fgets(line, LINE_MAX - 1, fd)) {
        row++;
        if (!regexec(&creg[0], line, 0, match, 0))
            continue;
        else if (!regexec(&creg[1], line, 9, match, 0))
            set_account(line, match);
        else if (!regexec(&creg[2], line, 3, match, 0))
            r = set_mboxgrp(line, match);
        else if (!regexec(&creg[3], line, 3, match, 0))
            r = set_filter(line, match);
        else if (!regexec(&creg[4], line, 9, match, 0))
            r = set_action(line, match);
        else if (!regexec(&creg[5], line, 7, match, 0) ||
                 !regexec(&creg[6], line, 7, match, 0) ||
                 !regexec(&creg[7], line, 7, match, 0) ||
                 !regexec(&creg[8], line, 7, match, 0))
            r = set_mask(line, match);
        else if (!regexec(&creg[9], line, 3, match, 0))
            r = set_job(line, match);
        else if (!regexec(&creg[10], line, 4, match, 0) ||
                 !regexec(&creg[11], line, 4, match, 0) ||
                 !regexec(&creg[12], line, 4, match, 0))
            set_options(line, match);
        else
            return row;

        if (r == ERROR_CONFIG_PARSE)
            return row;
    }

    for (i = 0; i < 13; i++)
        regfree(&creg[i]);

    destroy_data();

    return 0;
}


/*
 * Set other options found in config file.
 */
void set_options(char *line, regmatch_t * match)
{
    if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) {
        if (!*logfile)
            strncat(logfile, line + match[3].rm_so,
                    min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1));
    } else if (!strncasecmp(line + match[2].rm_so, "header", 6)) {
        if (!strncasecmp(line + match[3].rm_so, "yes", 3))
            options |= OPTION_HEADERS;
        else
            options &= ~(OPTION_HEADERS);
    } else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) {
        if (!strncasecmp(line + match[3].rm_so, "yes", 3))
            options |= OPTION_NAMESPACE;
        else
            options &= ~(OPTION_NAMESPACE);
    } else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) {
        errno = 0;
        timeout = strtol(line + match[3].rm_so, NULL, 10);
        if (errno)
            timeout = 0;
    } else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) && 
               !(options & OPTION_DAEMON_MODE)) {
        options |= OPTION_DAEMON_MODE;
        errno = 0;
        interval = strtoul(line + match[3].rm_so, NULL, 10);
        if (errno)
            interval = 0;
    }
}


#ifdef ENCRYPTED_PASSWORDS
/*
 * Open password file and call parse_passwords().
 */
int read_passwords(void)
{
    FILE *fd;
    char pwfile[PATH_MAX];
    
    if (!(flags & FLAG_BLANK_PASSWORD))
        return ERROR_CONFIG_PARSE;
    
    passphr = (char *) smalloc(PASSPHRASE_LEN);

    snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
#ifdef DEBUG
    printf("debug: passwords file: '%s'\n", pwfile);
#endif
    
    if (!exists_file(pwfile))
        return ERROR_FILE_OPEN;
    
#ifdef CHECK_PERMISSIONS
    check_file_perms(pwfile, S_IRUSR | S_IWUSR);
#endif

    fd = fopen(pwfile, "r");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
              pwfile, strerror(errno));

    parse_passwords(fd);

    fclose(fd);

    return 0;
}


/*
 *  Parse unencrypted password file.
 */
int parse_passwords(FILE * fd)
{
    int t = 3;
    char *pe = NULL;
    char user[USERNAME_LEN], serv[SERVER_LEN];
    unsigned char *buf;
    char *c, *cp, *line;
    regex_t creg;
    regmatch_t match[4];
    const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";
    int r;

    do {
        fseek(fd, 0L, SEEK_SET);
        printf("Enter master passphrase: ");
        get_password(passphr, PASSPHRASE_LEN);
    } while ((r = decrypt_passwords(&buf, fd)) && --t);
    
    if (!t)
        return ERROR_PASSPHRASE;

    c = cp = sstrdup(buf);
    
    regcomp(&creg, reg, REG_EXTENDED | REG_ICASE);

    while ((line = strsep(&c, "\n")) &&
           !regexec(&creg, line, 4, match, 0)) {
        user[0] = serv[0] = 0;
        
        strncat(serv, line + match[1].rm_so,
                min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
        strncat(user, line + match[2].rm_so,
                min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
        
        if ((pe = (char *) find_password(user, serv)))
            strncat(pe, line + match[3].rm_so,
                    min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1));
    }
    
    regfree(&creg);
    sfree(cp);   
    sfree(buf);

    return 0;
}


/*
 * Store encrypted passwords to file.
 */
int store_passwords(account_t * accts[])
{
    char pwfile[PATH_MAX];
    FILE *fd;

    snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
    
    create_file(pwfile, S_IRUSR | S_IWUSR);

    fd = fopen(pwfile, "w");

    if (!fd)
        fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
              pwfile, strerror(errno));
    
    encrypt_passwords(fd, accts);
    
    fclose(fd);

    return 0;
}
#endif


/*
 * Create $HOME/.imapfilter directory.
 */
int create_homedir(void)
{
    char *hdn = ".imapfilter";
    
    if (home)
        if (chdir(home))
            error("imapfilter: could not change directory; %s\n",
                  strerror(errno));

    if (!exists_dir(hdn))
        if (mkdir(hdn, S_IRUSR | S_IWUSR | S_IXUSR))
            error("imapfilter: could not create directory %s; %s\n", hdn,
                  strerror(errno));

    return 0;
}


/*
 * Check if a file exists.
 */
int exists_file(char *fname)
{
    struct stat fs;
    
    if (access(fname, F_OK))
        return 0;
    
    stat(fname, &fs);
    if (!S_ISREG(fs.st_mode)) {
        error("imapfilter: file %s not a regular file\n", fname);
        return ERROR_FILE_OPEN;
    }
    
    return 1;
}


/* 
 * Check if a directory exists.
 */
int exists_dir(char *dname)
{
    struct stat ds;
    
    if (access(dname, F_OK))
        return 0;
    
    stat(dname, &ds);
    if (!S_ISDIR(ds.st_mode)) {
        error("imapfilter: file %s not a directory\n", dname);
        return ERROR_FILE_OPEN;
    }
    
    return 1;
}


/*
 * Create a file with the specified permissions.
 */
int create_file(char *fname, mode_t mode)
{
    int fd = 0;
    
    if (!exists_file(fname)) {
        fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode);
        if (fd == -1) {
            error("imapfilter: could not create file %s; %s\n", fname,
                  strerror(errno));
            return ERROR_FILE_OPEN;
        }
        close(fd);
    }

    return 0;
}


#ifdef CHECK_PERMISSIONS
/*
 * Check the permissions of a file.
 */
int check_file_perms(char *fname, mode_t mode)
{
    struct stat fs;
    
    if (stat(fname, &fs)) {
        error("imapfilter: getting file %s status; %s\n", fname,
              strerror(errno));
        return ERROR_TRIVIAL;
    }
    if (!S_ISREG(fs.st_mode)) {
        error("imapfilter: file %s not a regular file\n", fname);
        return ERROR_TRIVIAL;
    }
    if ((fs.st_mode & 00777) != mode) {
        error("imapfilter: warning: improper file %s permissions\n"
              "imapfilter: warning: file's mode should be %o not %o\n",
              fname, mode, fs.st_mode & 00777);
        return ERROR_TRIVIAL;
    }
    return 0;
}


/*
 * Check the permissions of a directory.
 */
int check_dir_perms(char *dname, mode_t mode)
{
    struct stat ds;

    if (stat(dname, &ds)) {
        error("imapfilter: getting file %s status; %s\n", dname,
              strerror(errno));
        return ERROR_TRIVIAL;
    }
    if (!S_ISDIR(ds.st_mode)) {
        error("imapfilter: file %s not a directory\n", dname);
        return ERROR_TRIVIAL;
    }
    if ((ds.st_mode & 00777) != mode) {
        error("imapfilter: warning: improper dir %s permissions\n"
              "imapfilter: warning: file's mode should be %o not %o\n",
              dname, mode, ds.st_mode & 00777);
        return ERROR_TRIVIAL;
    }
    return 0;
}
#endif


1	lefcha	1.1	#include <stdio.h>
2	lefcha	1.28	#include <unistd.h>
3	lefcha	1.1	#include <errno.h>
4	lefcha	1.5	#include <sys/types.h>
5	lefcha	1.1	#include <regex.h>
6			#include <string.h>
7			#include <stdlib.h>
8			#include <limits.h>
9	lefcha	1.10	#include <sys/stat.h>
10	lefcha	1.28	#include <fcntl.h>
11	lefcha	1.29	#include <time.h>
12	lefcha	1.1
13			#include "config.h"
14			#include "imapfilter.h"
15	lefcha	1.13	#include "data.h"
16	lefcha	1.1
17
18	lefcha	1.6	extern char logfile[PATH_MAX];
19	lefcha	1.11	extern unsigned int options;
20	lefcha	1.34	extern unsigned int flags;
21			extern unsigned int interval;
22	lefcha	1.28	extern long timeout;
23	lefcha	1.29	extern char *home;
24
25			#ifdef ENCRYPTED_PASSWORDS
26	lefcha	1.31	char passphr; / Master password to access the
27			passwords file. */
28	lefcha	1.28	#endif
29	lefcha	1.27
30	lefcha	1.1
31			/*
32	lefcha	1.13	* Find the path to configuration file, open it and call parse_config().
33	lefcha	1.1	*/
34			int read_config(char *cfg)
35			{
36			int r;
37	lefcha	1.29	FILE *fd;
38	lefcha	1.23	char *c = NULL;
39	lefcha	1.24
40	lefcha	1.1	if (!cfg) {
41	lefcha	1.23	cfg = c = (char ) xmalloc(PATH_MAX sizeof(char));
42	lefcha	1.1	snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
43			}
44	lefcha	1.36
45	lefcha	1.1	#ifdef DEBUG
46	lefcha	1.11	printf("debug: configuration file: '%s'\n", cfg);
47	lefcha	1.1	#endif
48	lefcha	1.13	#ifdef CHECK_PERMISSIONS
49	lefcha	1.28	check_file_perms(cfg, S_IRUSR \| S_IWUSR);
50	lefcha	1.12	#endif
51	lefcha	1.29	fd = fopen(cfg, "r");
52	lefcha	1.1
53	lefcha	1.29	if (!fd)
54	lefcha	1.17	fatal(ERROR_FILE_OPEN, "imapfilter: opening config file %s; %s\n",
55	lefcha	1.11	cfg, strerror(errno));
56	lefcha	1.1
57	lefcha	1.23	if (c)
58	lefcha	1.29	xfree(c);
59	lefcha	1.23
60	lefcha	1.29	if ((r = parse_config(fd)))
61	lefcha	1.17	fatal(ERROR_CONFIG_PARSE,
62			"imapfilter: parse error in config file at row %d\n", r);
63	lefcha	1.1
64	lefcha	1.29	fclose(fd);
65	lefcha	1.1
66	lefcha	1.11	#ifdef DEBUG
67			printf("debug: options: %0#10x\n", options);
68			#endif
69
70	lefcha	1.17	return 0;
71	lefcha	1.1	}
72
73	lefcha	1.6
74	lefcha	1.10	/*
75	lefcha	1.13	* Parse configuration file.
76	lefcha	1.1	*/
77	lefcha	1.29	int parse_config(FILE * fd)
78	lefcha	1.1	{
79	lefcha	1.17	int i, r = 0;
80	lefcha	1.1	unsigned int row = 0;
81			char line[LINE_MAX];
82	lefcha	1.27	regex_t creg[13];
83	lefcha	1.36	regmatch_t match[9];
84	lefcha	1.27	const char *reg[13] = {
85	lefcha	1.15	"^([[:blank:]]\n\|#.\n)$",
86	lefcha	1.36
87			"^[[:blank:]]*ACCOUNT[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
88			"(([[:graph:]]+):([[:graph:]]*)\|([[:graph:]]+))@([[:alnum:].-]+)"
89			"(:[[:digit:]]+)?[[:blank:]]*([[:blank:]]SSL\|[[:blank:]]SSL2\|"
90			"[[:blank:]]SSL3\|[[:blank:]]TLS1)?[[:blank:]]*\n$",
91
92			"^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
93			"([[:print:]]+)[[:blank:]]*\n$",
94
95			"^[[:blank:]]FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]"
96			"([[:blank:]]OR\|[[:blank:]]AND)?[[:blank:]]*\n$",
97
98			"^[[:blank:]]*ACTION[[:blank:]]+(DELETE\|"
99			"COPY[[:blank:]]+(\"[[:print:]]*\"\|[[:graph:]]+)\|"
100			"MOVE[[:blank:]]+(\"[[:print:]]*\"\|[[:graph:]]+)\|"
101			"RCOPY[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
102			"(\"[[:print:]]*\"\|[[:graph:]]+)\|"
103			"RMOVE[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+"
104			"(\"[[:print:]]*\"\|[[:graph:]]+)\|"
105			"LIST)[[:blank:]]([[:graph:]])[[:blank:]]*\n$",
106
107			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|"
108			"AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]]"
109			"(ANSWERED\|DELETED\|DRAFT\|FLAGGED\|NEW\|OLD\|RECENT\|SEEN\|UNANSWERED\|"
110			"UNDELETED\|UNDRAFT\|UNFLAGGED\|UNSEEN)[[:blank:]]*\n$",
111
112			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|"
113			"AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]]"
114			"(BCC\|BODY\|CC\|FROM\|SUBJECT\|TEXT\|TO)[[:blank:]]+(\"[[:print:]]*\"\|"
115			"[[:graph:]]+)[[:blank:]]*\n$",
116
117			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|"
118			"AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]]"
119			"(HEADER)[[:blank:]]+(\"[[:print:]]*\"\|[[:graph:]]+)[[:blank:]]+"
120			"(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]\n$",
121
122			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|"
123			"AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]]"
124			"(LARGER\|SMALLER\|OLDER\|NEWER)[[:blank:]]+([[:digit:]]+)"
125			"[[:blank:]]*\n$",
126
127			"^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+"
128			"([[:alnum:],_-]+)[[:blank:]]*\n$",
129
130			"^[[:blank:]](SET[[:blank:]])?[[:blank:]](LOGFILE)"
131			"[[:blank:]]=[[:blank:]]([[:print:]]+)\n$",
132
133			"^[[:blank:]](SET[[:blank:]])?[[:blank:]](HEADERS\|NAMESPACE)"
134			"[[:blank:]]=[[:blank:]](YES\|NO)[[:blank:]]*\n$",
135
136			"^[[:blank:]](SET[[:blank:]])?[[:blank:]](DAEMON\|TIMEOUT)"
137			"[[:blank:]]=[[:blank:]]([[:digit:]]+)\n$"
138	lefcha	1.1	};
139
140	lefcha	1.27	for (i = 0; i < 13; i++)
141	lefcha	1.14	regcomp(&creg[i], reg[i], REG_EXTENDED \| REG_ICASE);
142	lefcha	1.1
143	lefcha	1.29	while (fgets(line, LINE_MAX - 1, fd)) {
144	lefcha	1.1	row++;
145	lefcha	1.15	if (!regexec(&creg[0], line, 0, match, 0))
146			continue;
147	lefcha	1.36	else if (!regexec(&creg[1], line, 9, match, 0))
148	lefcha	1.13	set_account(line, match);
149	lefcha	1.15	else if (!regexec(&creg[2], line, 3, match, 0))
150	lefcha	1.17	r = set_mboxgrp(line, match);
151	lefcha	1.15	else if (!regexec(&creg[3], line, 3, match, 0))
152	lefcha	1.17	r = set_filter(line, match);
153	lefcha	1.36	else if (!regexec(&creg[4], line, 9, match, 0))
154	lefcha	1.17	r = set_action(line, match);
155	lefcha	1.15	else if (!regexec(&creg[5], line, 7, match, 0) \|\|
156	lefcha	1.18	!regexec(&creg[6], line, 7, match, 0) \|\|
157			!regexec(&creg[7], line, 7, match, 0) \|\|
158			!regexec(&creg[8], line, 7, match, 0))
159	lefcha	1.17	r = set_mask(line, match);
160	lefcha	1.15	else if (!regexec(&creg[9], line, 3, match, 0))
161	lefcha	1.17	r = set_job(line, match);
162	lefcha	1.26	else if (!regexec(&creg[10], line, 4, match, 0) \|\|
163	lefcha	1.27	!regexec(&creg[11], line, 4, match, 0) \|\|
164			!regexec(&creg[12], line, 4, match, 0))
165	lefcha	1.15	set_options(line, match);
166	lefcha	1.17	else
167	lefcha	1.18	return row;
168
169	lefcha	1.17	if (r == ERROR_CONFIG_PARSE)
170			return row;
171	lefcha	1.1	}
172	lefcha	1.3
173	lefcha	1.27	for (i = 0; i < 13; i++)
174	lefcha	1.12	regfree(&creg[i]);
175	lefcha	1.18
176	lefcha	1.15	destroy_data();
177	lefcha	1.6
178	lefcha	1.8	return 0;
179	lefcha	1.1	}
180
181
182			/*
183	lefcha	1.13	* Set other options found in config file.
184	lefcha	1.11	*/
185			void set_options(char line, regmatch_t match)
186			{
187	lefcha	1.26	if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) {
188	lefcha	1.19	if (!*logfile)
189	lefcha	1.26	strncat(logfile, line + match[3].rm_so,
190			min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1));
191	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "header", 6)) {
192	lefcha	1.26	if (!strncasecmp(line + match[3].rm_so, "yes", 3))
193	lefcha	1.19	options \|= OPTION_HEADERS;
194	lefcha	1.25	else
195			options &= ~(OPTION_HEADERS);
196	lefcha	1.28	} else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) {
197			if (!strncasecmp(line + match[3].rm_so, "yes", 3))
198			options \|= OPTION_NAMESPACE;
199			else
200			options &= ~(OPTION_NAMESPACE);
201	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) {
202			errno = 0;
203			timeout = strtol(line + match[3].rm_so, NULL, 10);
204			if (errno)
205			timeout = 0;
206	lefcha	1.34	} else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) &&
207			!(options & OPTION_DAEMON_MODE)) {
208			options \|= OPTION_DAEMON_MODE;
209			errno = 0;
210			interval = strtoul(line + match[3].rm_so, NULL, 10);
211			if (errno)
212			interval = 0;
213	lefcha	1.19	}
214	lefcha	1.1	}
215	lefcha	1.29
216
217			#ifdef ENCRYPTED_PASSWORDS
218			/*
219			* Open password file and call parse_passwords().
220			*/
221			int read_passwords(void)
222			{
223			FILE *fd;
224			char pwfile[PATH_MAX];
225	lefcha	1.34
226			if (!(flags & FLAG_BLANK_PASSWORD))
227	lefcha	1.36	return ERROR_CONFIG_PARSE;
228	lefcha	1.31
229			passphr = (char *) smalloc(PASSPHRASE_LEN);
230	lefcha	1.29
231			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
232			#ifdef DEBUG
233			printf("debug: passwords file: '%s'\n", pwfile);
234			#endif
235
236			if (!exists_file(pwfile))
237	lefcha	1.36	return ERROR_FILE_OPEN;
238	lefcha	1.29
239			#ifdef CHECK_PERMISSIONS
240			check_file_perms(pwfile, S_IRUSR \| S_IWUSR);
241			#endif
242
243			fd = fopen(pwfile, "r");
244
245			if (!fd)
246			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
247			pwfile, strerror(errno));
248
249			parse_passwords(fd);
250
251			fclose(fd);
252
253			return 0;
254			}
255
256
257			/*
258			* Parse unencrypted password file.
259			*/
260			int parse_passwords(FILE * fd)
261			{
262			int t = 3;
263			char *pe = NULL;
264			char user[USERNAME_LEN], serv[SERVER_LEN];
265			unsigned char *buf;
266			char c, cp, *line;
267			regex_t creg;
268			regmatch_t match[4];
269			const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";
270	lefcha	1.36	int r;
271	lefcha	1.29
272			do {
273	lefcha	1.36	fseek(fd, 0L, SEEK_SET);
274	lefcha	1.29	printf("Enter master passphrase: ");
275			get_password(passphr, PASSPHRASE_LEN);
276	lefcha	1.36	} while ((r = decrypt_passwords(&buf, fd)) && --t);
277	lefcha	1.29
278			if (!t)
279			return ERROR_PASSPHRASE;
280
281	lefcha	1.31	c = cp = sstrdup(buf);
282	lefcha	1.29
283			regcomp(&creg, reg, REG_EXTENDED \| REG_ICASE);
284
285			while ((line = strsep(&c, "\n")) &&
286			!regexec(&creg, line, 4, match, 0)) {
287			user[0] = serv[0] = 0;
288
289			strncat(serv, line + match[1].rm_so,
290			min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
291			strncat(user, line + match[2].rm_so,
292			min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
293
294			if ((pe = (char *) find_password(user, serv)))
295			strncat(pe, line + match[3].rm_so,
296			min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1));
297			}
298
299			regfree(&creg);
300	lefcha	1.31	sfree(cp);
301			sfree(buf);
302	lefcha	1.29
303			return 0;
304			}
305
306
307			/*
308			* Store encrypted passwords to file.
309			*/
310			int store_passwords(account_t * accts[])
311			{
312			char pwfile[PATH_MAX];
313			FILE *fd;
314
315			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
316	lefcha	1.32
317			create_file(pwfile, S_IRUSR \| S_IWUSR);
318	lefcha	1.29
319			fd = fopen(pwfile, "w");
320
321			if (!fd)
322			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
323			pwfile, strerror(errno));
324
325			encrypt_passwords(fd, accts);
326
327			fclose(fd);
328
329			return 0;
330			}
331			#endif
332	lefcha	1.31
333
334			/*
335			* Create $HOME/.imapfilter directory.
336			*/
337			int create_homedir(void)
338			{
339	lefcha	1.33	char *hdn = ".imapfilter";
340	lefcha	1.31
341			if (home)
342			if (chdir(home))
343			error("imapfilter: could not change directory; %s\n",
344			strerror(errno));
345
346	lefcha	1.36	if (!exists_dir(hdn))
347			if (mkdir(hdn, S_IRUSR \| S_IWUSR \| S_IXUSR))
348			error("imapfilter: could not create directory %s; %s\n", hdn,
349			strerror(errno));
350
351	lefcha	1.31	return 0;
352			}
353
354
355			/*
356			* Check if a file exists.
357			*/
358			int exists_file(char *fname)
359			{
360			struct stat fs;
361
362			if (access(fname, F_OK))
363			return 0;
364
365			stat(fname, &fs);
366			if (!S_ISREG(fs.st_mode)) {
367			error("imapfilter: file %s not a regular file\n", fname);
368			return ERROR_FILE_OPEN;
369			}
370
371			return 1;
372			}
373
374
375			/*
376			* Check if a directory exists.
377			*/
378			int exists_dir(char *dname)
379			{
380			struct stat ds;
381
382			if (access(dname, F_OK))
383			return 0;
384
385			stat(dname, &ds);
386			if (!S_ISDIR(ds.st_mode)) {
387			error("imapfilter: file %s not a directory\n", dname);
388			return ERROR_FILE_OPEN;
389			}
390
391			return 1;
392			}
393
394
395			/*
396	lefcha	1.36	* Create a file with the specified permissions.
397	lefcha	1.31	*/
398			int create_file(char *fname, mode_t mode)
399			{
400			int fd = 0;
401
402	lefcha	1.33	if (!exists_file(fname)) {
403			fd = open(fname, O_CREAT \| O_WRONLY \| O_TRUNC, mode);
404	lefcha	1.31	if (fd == -1) {
405			error("imapfilter: could not create file %s; %s\n", fname,
406			strerror(errno));
407			return ERROR_FILE_OPEN;
408			}
409			close(fd);
410	lefcha	1.33	}
411	lefcha	1.31
412			return 0;
413			}
414
415
416			#ifdef CHECK_PERMISSIONS
417			/*
418			* Check the permissions of a file.
419			*/
420			int check_file_perms(char *fname, mode_t mode)
421			{
422			struct stat fs;
423	lefcha	1.36
424	lefcha	1.31	if (stat(fname, &fs)) {
425			error("imapfilter: getting file %s status; %s\n", fname,
426			strerror(errno));
427			return ERROR_TRIVIAL;
428			}
429			if (!S_ISREG(fs.st_mode)) {
430			error("imapfilter: file %s not a regular file\n", fname);
431			return ERROR_TRIVIAL;
432			}
433			if ((fs.st_mode & 00777) != mode) {
434			error("imapfilter: warning: improper file %s permissions\n"
435			"imapfilter: warning: file's mode should be %o not %o\n",
436			fname, mode, fs.st_mode & 00777);
437			return ERROR_TRIVIAL;
438			}
439			return 0;
440			}
441
442
443			/*
444			* Check the permissions of a directory.
445			*/
446			int check_dir_perms(char *dname, mode_t mode)
447			{
448			struct stat ds;
449
450			if (stat(dname, &ds)) {
451			error("imapfilter: getting file %s status; %s\n", dname,
452			strerror(errno));
453			return ERROR_TRIVIAL;
454			}
455			if (!S_ISDIR(ds.st_mode)) {
456			error("imapfilter: file %s not a directory\n", dname);
457			return ERROR_TRIVIAL;
458			}
459			if ((ds.st_mode & 00777) != mode) {
460			error("imapfilter: warning: improper dir %s permissions\n"
461			"imapfilter: warning: file's mode should be %o not %o\n",
462			dname, mode, ds.st_mode & 00777);
463			return ERROR_TRIVIAL;
464			}
465			return 0;
466			}
467			#endif
468	lefcha	1.33
469
470	lefcha	1.31