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[8];
    const char *reg[13] = {
        "^([[:blank:]]*\n|#.*\n)$",
#ifndef SSL_TLS
        "^[[:blank:]]*ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*\n$",
#else
        "^[[:blank:]]*ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*([[:blank:]]SSL|[[:blank:]]SSL2|[[:blank:]]SSL3|[[:blank:]]TLS1)?[[:blank:]]*\n$",
#endif
        "^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:print:]]+)[[:blank:]]*\n$",
        "^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$",
        "^[[:blank:]]*ACTION[[:blank:]]+(DELETE|COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$",
        "^[[: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;
#ifndef SSL_TLS
        else if (!regexec(&creg[1], line, 7, match, 0))
#else
        else if (!regexec(&creg[1], line, 8, match, 0))
#endif
            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, 5, 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 1;
    
    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 1;
    
#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:]]+)";

    do {
        printf("Enter master passphrase: ");
        get_password(passphr, PASSPHRASE_LEN);
    } while (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));

    create_dir(hdn, S_IRUSR | S_IWUSR | S_IXUSR);
    
    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.
 */
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;
}


/*
 * Create a directory.
 */
int create_dir(char *dname, mode_t mode)
{
    if (!exists_dir(dname))
        if (mkdir(dname, mode))
            error("imapfilter: could not create directory %s; %s\n", dname,
                  strerror(errno));

    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	1.8
43	lefcha	1.1	snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc");
44			}
45			#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	1.28	regmatch_t match[8];
84	lefcha	1.27	const char *reg[13] = {
85	lefcha	1.15	"^([[:blank:]]\n\|#.\n)$",
86	lefcha	1.25	#ifndef SSL_TLS
87	lefcha	1.28	"^[[:blank:]]ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]])\|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*\n$",
88	lefcha	1.25	#else
89	lefcha	1.28	"^[[:blank:]]ACCOUNT[[:blank:]]+(([[:graph:]]+):([[:graph:]])\|([[:graph:]]+))@([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]([[:blank:]]SSL\|[[:blank:]]SSL2\|[[:blank:]]SSL3\|[[:blank:]]TLS1)?[[:blank:]]\n$",
90	lefcha	1.25	#endif
91	lefcha	1.31	"^[[:blank:]]FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+([[:print:]]+)[[:blank:]]\n$",
92	lefcha	1.13	"^[[:blank:]]FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]([[:blank:]]OR\|[[:blank:]]AND)?[[:blank:]]*\n$",
93	lefcha	1.30	"^[[:blank:]]ACTION[[:blank:]]+(DELETE\|COPY[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)\|MOVE[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)\|LIST)[[:blank:]]([[:graph:]])[[:blank:]]\n$",
94	lefcha	1.17	"^[[: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$",
95			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](BCC\|BODY\|CC\|FROM\|SUBJECT\|TEXT\|TO)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]\n$",
96			"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](HEADER)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]+(\"[[:print:]]\"\|[[:graph:]]+)[[:blank:]]*\n$",
97	lefcha	1.26	"^[[:blank:]](MASK[[:blank:]])?[[:blank:]](OR[[:blank:]]\|AND[[:blank:]])?[[:blank:]](NOT[[:blank:]])?[[:blank:]](LARGER\|SMALLER\|OLDER\|NEWER)[[:blank:]]+([[:digit:]]+)[[:blank:]]*\n$",
98	lefcha	1.13	"^[[:blank:]]JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]\n$",
99	lefcha	1.26	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](LOGFILE)[[:blank:]]=[[:blank:]]([[:print:]]+)\n$",
100	lefcha	1.28	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](HEADERS\|NAMESPACE)[[:blank:]]=[[:blank:]](YES\|NO)[[:blank:]]*\n$",
101	lefcha	1.34	"^[[:blank:]](SET[[:blank:]])?[[:blank:]](DAEMON\|TIMEOUT)[[:blank:]]=[[:blank:]]([[:digit:]]+)\n$"
102	lefcha	1.1	};
103
104	lefcha	1.27	for (i = 0; i < 13; i++)
105	lefcha	1.14	regcomp(&creg[i], reg[i], REG_EXTENDED \| REG_ICASE);
106	lefcha	1.1
107	lefcha	1.29	while (fgets(line, LINE_MAX - 1, fd)) {
108	lefcha	1.1	row++;
109	lefcha	1.15	if (!regexec(&creg[0], line, 0, match, 0))
110			continue;
111	lefcha	1.26	#ifndef SSL_TLS
112	lefcha	1.28	else if (!regexec(&creg[1], line, 7, match, 0))
113	lefcha	1.25	#else
114	lefcha	1.28	else if (!regexec(&creg[1], line, 8, match, 0))
115	lefcha	1.25	#endif
116	lefcha	1.13	set_account(line, match);
117	lefcha	1.15	else if (!regexec(&creg[2], line, 3, match, 0))
118	lefcha	1.17	r = set_mboxgrp(line, match);
119	lefcha	1.15	else if (!regexec(&creg[3], line, 3, match, 0))
120	lefcha	1.17	r = set_filter(line, match);
121			else if (!regexec(&creg[4], line, 5, match, 0))
122			r = set_action(line, match);
123	lefcha	1.15	else if (!regexec(&creg[5], line, 7, match, 0) \|\|
124	lefcha	1.18	!regexec(&creg[6], line, 7, match, 0) \|\|
125			!regexec(&creg[7], line, 7, match, 0) \|\|
126			!regexec(&creg[8], line, 7, match, 0))
127	lefcha	1.17	r = set_mask(line, match);
128	lefcha	1.15	else if (!regexec(&creg[9], line, 3, match, 0))
129	lefcha	1.17	r = set_job(line, match);
130	lefcha	1.26	else if (!regexec(&creg[10], line, 4, match, 0) \|\|
131	lefcha	1.27	!regexec(&creg[11], line, 4, match, 0) \|\|
132			!regexec(&creg[12], line, 4, match, 0))
133	lefcha	1.15	set_options(line, match);
134	lefcha	1.17	else
135	lefcha	1.18	return row;
136
137	lefcha	1.17	if (r == ERROR_CONFIG_PARSE)
138			return row;
139	lefcha	1.1	}
140	lefcha	1.3
141	lefcha	1.27	for (i = 0; i < 13; i++)
142	lefcha	1.12	regfree(&creg[i]);
143	lefcha	1.18
144	lefcha	1.15	destroy_data();
145	lefcha	1.6
146	lefcha	1.8	return 0;
147	lefcha	1.1	}
148
149
150			/*
151	lefcha	1.13	* Set other options found in config file.
152	lefcha	1.11	*/
153			void set_options(char line, regmatch_t match)
154			{
155	lefcha	1.26	if (!strncasecmp(line + match[2].rm_so, "logfile", 7)) {
156	lefcha	1.19	if (!*logfile)
157	lefcha	1.26	strncat(logfile, line + match[3].rm_so,
158			min((match[3].rm_eo - match[3].rm_so), PATH_MAX - 1));
159	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "header", 6)) {
160	lefcha	1.26	if (!strncasecmp(line + match[3].rm_so, "yes", 3))
161	lefcha	1.19	options \|= OPTION_HEADERS;
162	lefcha	1.25	else
163			options &= ~(OPTION_HEADERS);
164	lefcha	1.28	} else if (!strncasecmp(line + match[2].rm_so, "namespace", 9)) {
165			if (!strncasecmp(line + match[3].rm_so, "yes", 3))
166			options \|= OPTION_NAMESPACE;
167			else
168			options &= ~(OPTION_NAMESPACE);
169	lefcha	1.27	} else if (!strncasecmp(line + match[2].rm_so, "timeout", 7)) {
170			errno = 0;
171			timeout = strtol(line + match[3].rm_so, NULL, 10);
172			if (errno)
173			timeout = 0;
174	lefcha	1.34	} else if (!strncasecmp(line + match[2].rm_so, "daemon", 6) &&
175			!(options & OPTION_DAEMON_MODE)) {
176			options \|= OPTION_DAEMON_MODE;
177			errno = 0;
178			interval = strtoul(line + match[3].rm_so, NULL, 10);
179			if (errno)
180			interval = 0;
181	lefcha	1.19	}
182	lefcha	1.1	}
183	lefcha	1.29
184
185			#ifdef ENCRYPTED_PASSWORDS
186			/*
187			* Open password file and call parse_passwords().
188			*/
189			int read_passwords(void)
190			{
191			FILE *fd;
192			char pwfile[PATH_MAX];
193	lefcha	1.34
194			if (!(flags & FLAG_BLANK_PASSWORD))
195			return 1;
196	lefcha	1.31
197			passphr = (char *) smalloc(PASSPHRASE_LEN);
198	lefcha	1.29
199			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
200			#ifdef DEBUG
201			printf("debug: passwords file: '%s'\n", pwfile);
202			#endif
203
204			if (!exists_file(pwfile))
205			return 1;
206
207			#ifdef CHECK_PERMISSIONS
208			check_file_perms(pwfile, S_IRUSR \| S_IWUSR);
209			#endif
210
211			fd = fopen(pwfile, "r");
212
213			if (!fd)
214			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
215			pwfile, strerror(errno));
216
217			parse_passwords(fd);
218
219			fclose(fd);
220
221			return 0;
222			}
223
224
225			/*
226			* Parse unencrypted password file.
227			*/
228			int parse_passwords(FILE * fd)
229			{
230			int t = 3;
231			char *pe = NULL;
232			char user[USERNAME_LEN], serv[SERVER_LEN];
233			unsigned char *buf;
234			char c, cp, *line;
235			regex_t creg;
236			regmatch_t match[4];
237			const char *reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)";
238
239			do {
240			printf("Enter master passphrase: ");
241			get_password(passphr, PASSPHRASE_LEN);
242	lefcha	1.31	} while (decrypt_passwords(&buf, fd) && --t);
243	lefcha	1.29
244			if (!t)
245			return ERROR_PASSPHRASE;
246
247	lefcha	1.31	c = cp = sstrdup(buf);
248	lefcha	1.29
249			regcomp(&creg, reg, REG_EXTENDED \| REG_ICASE);
250
251			while ((line = strsep(&c, "\n")) &&
252			!regexec(&creg, line, 4, match, 0)) {
253			user[0] = serv[0] = 0;
254
255			strncat(serv, line + match[1].rm_so,
256			min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1));
257			strncat(user, line + match[2].rm_so,
258			min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1));
259
260			if ((pe = (char *) find_password(user, serv)))
261			strncat(pe, line + match[3].rm_so,
262			min(match[3].rm_eo - match[3].rm_so, PASSWORD_LEN - 1));
263			}
264
265			regfree(&creg);
266	lefcha	1.31	sfree(cp);
267			sfree(buf);
268	lefcha	1.29
269			return 0;
270			}
271
272
273			/*
274			* Store encrypted passwords to file.
275			*/
276			int store_passwords(account_t * accts[])
277			{
278			char pwfile[PATH_MAX];
279			FILE *fd;
280
281			snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords");
282	lefcha	1.32
283			create_file(pwfile, S_IRUSR \| S_IWUSR);
284	lefcha	1.29
285			fd = fopen(pwfile, "w");
286
287			if (!fd)
288			fatal(ERROR_FILE_OPEN, "imapfilter: opening passwords file %s; %s\n",
289			pwfile, strerror(errno));
290
291			encrypt_passwords(fd, accts);
292
293			fclose(fd);
294
295			return 0;
296			}
297			#endif
298	lefcha	1.31
299
300			/*
301			* Create $HOME/.imapfilter directory.
302			*/
303			int create_homedir(void)
304			{
305	lefcha	1.33	char *hdn = ".imapfilter";
306	lefcha	1.31
307			if (home)
308			if (chdir(home))
309			error("imapfilter: could not change directory; %s\n",
310			strerror(errno));
311
312	lefcha	1.33	create_dir(hdn, S_IRUSR \| S_IWUSR \| S_IXUSR);
313
314	lefcha	1.31	return 0;
315			}
316
317
318			/*
319			* Check if a file exists.
320			*/
321			int exists_file(char *fname)
322			{
323			struct stat fs;
324
325			if (access(fname, F_OK))
326			return 0;
327
328			stat(fname, &fs);
329			if (!S_ISREG(fs.st_mode)) {
330			error("imapfilter: file %s not a regular file\n", fname);
331			return ERROR_FILE_OPEN;
332			}
333
334			return 1;
335			}
336
337
338			/*
339			* Check if a directory exists.
340			*/
341			int exists_dir(char *dname)
342			{
343			struct stat ds;
344
345			if (access(dname, F_OK))
346			return 0;
347
348			stat(dname, &ds);
349			if (!S_ISDIR(ds.st_mode)) {
350			error("imapfilter: file %s not a directory\n", dname);
351			return ERROR_FILE_OPEN;
352			}
353
354			return 1;
355			}
356
357
358			/*
359			* Create a file.
360			*/
361			int create_file(char *fname, mode_t mode)
362			{
363			int fd = 0;
364
365	lefcha	1.33	if (!exists_file(fname)) {
366			fd = open(fname, O_CREAT \| O_WRONLY \| O_TRUNC, mode);
367	lefcha	1.31	if (fd == -1) {
368			error("imapfilter: could not create file %s; %s\n", fname,
369			strerror(errno));
370			return ERROR_FILE_OPEN;
371			}
372			close(fd);
373	lefcha	1.33	}
374	lefcha	1.31
375			return 0;
376			}
377
378
379			/*
380			* Create a directory.
381			*/
382			int create_dir(char *dname, mode_t mode)
383			{
384			if (!exists_dir(dname))
385			if (mkdir(dname, mode))
386			error("imapfilter: could not create directory %s; %s\n", dname,
387			strerror(errno));
388
389			return 0;
390			}
391
392
393			#ifdef CHECK_PERMISSIONS
394			/*
395			* Check the permissions of a file.
396			*/
397			int check_file_perms(char *fname, mode_t mode)
398			{
399			struct stat fs;
400
401			if (stat(fname, &fs)) {
402			error("imapfilter: getting file %s status; %s\n", fname,
403			strerror(errno));
404			return ERROR_TRIVIAL;
405			}
406			if (!S_ISREG(fs.st_mode)) {
407			error("imapfilter: file %s not a regular file\n", fname);
408			return ERROR_TRIVIAL;
409			}
410			if ((fs.st_mode & 00777) != mode) {
411			error("imapfilter: warning: improper file %s permissions\n"
412			"imapfilter: warning: file's mode should be %o not %o\n",
413			fname, mode, fs.st_mode & 00777);
414			return ERROR_TRIVIAL;
415			}
416			return 0;
417			}
418
419
420			/*
421			* Check the permissions of a directory.
422			*/
423			int check_dir_perms(char *dname, mode_t mode)
424			{
425			struct stat ds;
426
427			if (stat(dname, &ds)) {
428			error("imapfilter: getting file %s status; %s\n", dname,
429			strerror(errno));
430			return ERROR_TRIVIAL;
431			}
432			if (!S_ISDIR(ds.st_mode)) {
433			error("imapfilter: file %s not a directory\n", dname);
434			return ERROR_TRIVIAL;
435			}
436			if ((ds.st_mode & 00777) != mode) {
437			error("imapfilter: warning: improper dir %s permissions\n"
438			"imapfilter: warning: file's mode should be %o not %o\n",
439			dname, mode, ds.st_mode & 00777);
440			return ERROR_TRIVIAL;
441			}
442			return 0;
443			}
444			#endif
445	lefcha	1.33
446
447	lefcha	1.31