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 |
|
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#include <string.h> |
7 |
|
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#include <stdlib.h> |
8 |
lefcha |
1.50 |
#include <ctype.h> |
9 |
lefcha |
1.1 |
#include <limits.h> |
10 |
lefcha |
1.10 |
#include <sys/stat.h> |
11 |
lefcha |
1.28 |
#include <fcntl.h> |
12 |
lefcha |
1.29 |
#include <time.h> |
13 |
lefcha |
1.1 |
|
14 |
|
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#include "config.h" |
15 |
|
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#include "imapfilter.h" |
16 |
lefcha |
1.13 |
#include "data.h" |
17 |
lefcha |
1.1 |
|
18 |
lefcha |
1.50 |
#ifdef SSL_TLS |
19 |
|
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#include <openssl/ssl.h> |
20 |
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#include <openssl/x509.h> |
21 |
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#include <openssl/pem.h> |
22 |
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#endif |
23 |
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|
24 |
lefcha |
1.1 |
|
25 |
lefcha |
1.6 |
extern char logfile[PATH_MAX]; |
26 |
lefcha |
1.11 |
extern unsigned int options; |
27 |
lefcha |
1.46 |
extern char charset[CHARSET_LEN]; |
28 |
lefcha |
1.34 |
extern unsigned int flags; |
29 |
|
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extern unsigned int interval; |
30 |
lefcha |
1.28 |
extern long timeout; |
31 |
lefcha |
1.29 |
extern char *home; |
32 |
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|
33 |
|
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#ifdef ENCRYPTED_PASSWORDS |
34 |
lefcha |
1.52 |
char *passphr = NULL; /* Master password to access the passwords |
35 |
lefcha |
1.48 |
* file. */ |
36 |
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|
37 |
lefcha |
1.28 |
#endif |
38 |
lefcha |
1.27 |
|
39 |
lefcha |
1.1 |
|
40 |
|
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/* |
41 |
lefcha |
1.13 |
* Find the path to configuration file, open it and call parse_config(). |
42 |
lefcha |
1.1 |
*/ |
43 |
lefcha |
1.48 |
int |
44 |
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read_config(char *cfg) |
45 |
lefcha |
1.1 |
{ |
46 |
lefcha |
1.48 |
int r; |
47 |
|
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FILE *fd; |
48 |
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char *c; |
49 |
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|
50 |
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c = NULL; |
51 |
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|
52 |
|
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if (cfg == NULL) { |
53 |
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cfg = c = (char *)xmalloc(PATH_MAX * sizeof(char)); |
54 |
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snprintf(cfg, PATH_MAX, "%s/%s", home, ".imapfilterrc"); |
55 |
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} |
56 |
lefcha |
1.1 |
#ifdef DEBUG |
57 |
lefcha |
1.48 |
fprintf(stderr, "debug: configuration file: '%s'\n", cfg); |
58 |
lefcha |
1.1 |
#endif |
59 |
lefcha |
1.13 |
#ifdef CHECK_PERMISSIONS |
60 |
lefcha |
1.48 |
check_file_perms(cfg, S_IRUSR | S_IWUSR); |
61 |
lefcha |
1.12 |
#endif |
62 |
lefcha |
1.48 |
fd = fopen(cfg, "r"); |
63 |
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if (fd == NULL) |
64 |
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fatal(ERROR_FILE_OPEN, "opening config file %s; %s\n", cfg, |
65 |
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strerror(errno)); |
66 |
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|
67 |
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if (c != NULL) |
68 |
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xfree(c); |
69 |
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|
70 |
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if ((r = parse_config(fd))) |
71 |
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fatal(ERROR_CONFIG_PARSE, |
72 |
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"parse error in config file at row %d\n", r); |
73 |
lefcha |
1.1 |
|
74 |
lefcha |
1.48 |
fclose(fd); |
75 |
lefcha |
1.1 |
|
76 |
lefcha |
1.11 |
#ifdef DEBUG |
77 |
lefcha |
1.48 |
fprintf(stderr, "debug: options: %0#10x '%s'\n", options, charset); |
78 |
lefcha |
1.11 |
#endif |
79 |
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|
80 |
lefcha |
1.48 |
return 0; |
81 |
lefcha |
1.1 |
} |
82 |
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|
83 |
lefcha |
1.6 |
|
84 |
lefcha |
1.10 |
/* |
85 |
lefcha |
1.13 |
* Parse configuration file. |
86 |
lefcha |
1.1 |
*/ |
87 |
lefcha |
1.48 |
int |
88 |
|
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parse_config(FILE * fd) |
89 |
lefcha |
1.1 |
{ |
90 |
lefcha |
1.48 |
int i, r; |
91 |
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unsigned int row; |
92 |
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char line[LINE_MAX]; |
93 |
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regex_t creg[13]; |
94 |
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regmatch_t match[11]; |
95 |
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const char *reg[13] = { |
96 |
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"^([[:blank:]]*\n|#.*\n)$", |
97 |
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98 |
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"^[[:blank:]]*ACCOUNT[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
99 |
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"(([[:graph:]]+):([[:graph:]]*)|([[:graph:]]+))@" |
100 |
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"([[:alnum:].-]+)(:[[:digit:]]+)?[[:blank:]]*" |
101 |
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"([[:blank:]]SSL|[[:blank:]]SSL2|[[:blank:]]SSL3|" |
102 |
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"[[:blank:]]TLS1)?[[:blank:]]*\n$", |
103 |
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104 |
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"^[[:blank:]]*FOLDER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
105 |
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"([[:print:]]+)[[:blank:]]*\n$", |
106 |
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107 |
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"^[[:blank:]]*FILTER[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]*" |
108 |
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"([[:blank:]]OR|[[:blank:]]AND)?[[:blank:]]*\n$", |
109 |
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110 |
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"^[[:blank:]]*ACTION[[:blank:]]+(DELETE|" |
111 |
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"COPY[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|" |
112 |
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"MOVE[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)|" |
113 |
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"RCOPY[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
114 |
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"(\"[[:print:]]*\"|[[:graph:]]+)|" |
115 |
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"RMOVE[[:blank:]]+([[:alnum:]_-]+)[[:blank:]]+" |
116 |
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"(\"[[:print:]]*\"|[[:graph:]]+)|" |
117 |
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"FLAG[[:blank:]]+(REPLACE|ADD|REMOVE)[[:blank:]]+" |
118 |
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"([[:alpha:],]+)|" |
119 |
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"LIST)[[:blank:]]*([[:graph:]]*)[[:blank:]]*\n$", |
120 |
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121 |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
122 |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
123 |
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"(ANSWERED|DELETED|DRAFT|FLAGGED|NEW|OLD|RECENT|SEEN|" |
124 |
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"UNANSWERED|UNDELETED|UNDRAFT|UNFLAGGED|UNSEEN)[[:blank:]]*\n$", |
125 |
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126 |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
127 |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
128 |
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"(BCC|BODY|CC|FROM|SUBJECT|TEXT|TO)[[:blank:]]+" |
129 |
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"(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$", |
130 |
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|
131 |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
132 |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
133 |
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"(HEADER)[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)" |
134 |
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"[[:blank:]]+(\"[[:print:]]*\"|[[:graph:]]+)[[:blank:]]*\n$", |
135 |
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136 |
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"^[[:blank:]]*(MASK[[:blank:]])?[[:blank:]]*(OR[[:blank:]]|" |
137 |
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"AND[[:blank:]])?[[:blank:]]*(NOT[[:blank:]])?[[:blank:]]*" |
138 |
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"(LARGER|SMALLER|OLDER|NEWER)[[:blank:]]+([[:digit:]]+)" |
139 |
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"[[:blank:]]*\n$", |
140 |
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|
141 |
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"^[[:blank:]]*JOB[[:blank:]]+([[:alnum:],_-]+)[[:blank:]]+" |
142 |
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"([[:alnum:],_-]+)[[:blank:]]*\n$", |
143 |
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|
144 |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(LOGFILE|CHARSET)" |
145 |
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"[[:blank:]]*=[[:blank:]]*(\"[[:print:]]*\"|[[:graph:]]+)" |
146 |
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"[[:blank:]]*\n$", |
147 |
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148 |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(ERRORS|EXPUNGE|" |
149 |
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"HEADERS|NAMESPACE|SUBSCRIBE|WARNING)[[:blank:]]*=[[:blank:]]*" |
150 |
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"(YES|NO)[[:blank:]]*\n$", |
151 |
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152 |
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"^[[:blank:]]*(SET[[:blank:]])?[[:blank:]]*(DAEMON|TIMEOUT)" |
153 |
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"[[:blank:]]*=[[:blank:]]*([[:digit:]]+)\n$" |
154 |
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}; |
155 |
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156 |
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r = row = 0; |
157 |
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|
158 |
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for (i = 0; i < 13; i++) |
159 |
|
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regcomp(&creg[i], reg[i], REG_EXTENDED | REG_ICASE); |
160 |
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|
161 |
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/* First process all the variables. This is done because some |
162 |
|
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* variables' arguments are used before the other commands are |
163 |
|
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* processed. */ |
164 |
|
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while (fgets(line, LINE_MAX - 1, fd)) |
165 |
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if (!regexec(&creg[10], line, 4, match, 0) || |
166 |
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!regexec(&creg[11], line, 4, match, 0) || |
167 |
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!regexec(&creg[12], line, 4, match, 0)) |
168 |
|
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set_options(line, match); |
169 |
lefcha |
1.3 |
|
170 |
lefcha |
1.48 |
/* Then rewind and process everything else. */ |
171 |
|
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fseek(fd, 0L, SEEK_SET); |
172 |
|
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while (fgets(line, LINE_MAX - 1, fd)) { |
173 |
|
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row++; |
174 |
|
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if (!regexec(&creg[0], line, 0, match, 0)) |
175 |
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continue; |
176 |
|
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else if (!regexec(&creg[1], line, 9, match, 0)) |
177 |
|
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set_account(line, match); |
178 |
|
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else if (!regexec(&creg[2], line, 3, match, 0)) |
179 |
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r = set_mboxgrp(line, match); |
180 |
|
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else if (!regexec(&creg[3], line, 3, match, 0)) |
181 |
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r = set_filter(line, match); |
182 |
|
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else if (!regexec(&creg[4], line, 11, match, 0)) |
183 |
|
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r = set_action(line, match); |
184 |
|
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else if (!regexec(&creg[5], line, 5, match, 0)) |
185 |
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r = set_mask(line, match, MASK_MATCH_1); |
186 |
|
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else if (!regexec(&creg[6], line, 6, match, 0)) |
187 |
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r = set_mask(line, match, MASK_MATCH_2); |
188 |
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else if (!regexec(&creg[7], line, 7, match, 0)) |
189 |
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r = set_mask(line, match, MASK_MATCH_3); |
190 |
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else if (!regexec(&creg[8], line, 6, match, 0)) |
191 |
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r = set_mask(line, match, MASK_MATCH_4); |
192 |
|
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else if (!regexec(&creg[9], line, 3, match, 0)) |
193 |
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r = set_job(line, match); |
194 |
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/* Skip variable processing. */ |
195 |
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else if (!regexec(&creg[10], line, 4, match, 0) || |
196 |
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!regexec(&creg[11], line, 4, match, 0) || |
197 |
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!regexec(&creg[12], line, 4, match, 0)); |
198 |
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else |
199 |
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return row; |
200 |
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|
201 |
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if (r == ERROR_CONFIG_PARSE) |
202 |
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return row; |
203 |
|
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} |
204 |
lefcha |
1.18 |
|
205 |
lefcha |
1.48 |
for (i = 0; i < 13; i++) |
206 |
|
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regfree(&creg[i]); |
207 |
lefcha |
1.6 |
|
208 |
lefcha |
1.52 |
destroy_unneeded(); |
209 |
lefcha |
1.48 |
|
210 |
|
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return 0; |
211 |
lefcha |
1.1 |
} |
212 |
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|
213 |
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|
214 |
|
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/* |
215 |
lefcha |
1.52 |
* Signal SIGHUP received, destroy all data structures and reread the |
216 |
|
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* configuration file. |
217 |
|
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*/ |
218 |
|
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void |
219 |
|
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reread_config(char *cfg) |
220 |
|
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{ |
221 |
|
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destroy_all(); |
222 |
|
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read_config(cfg); |
223 |
|
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read_passwords(); |
224 |
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|
225 |
|
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flags &= ~(FLAG_SIGHUP_RECEIVED); |
226 |
|
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} |
227 |
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228 |
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|
229 |
|
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/* |
230 |
lefcha |
1.13 |
* Set other options found in config file. |
231 |
lefcha |
1.11 |
*/ |
232 |
lefcha |
1.48 |
void |
233 |
|
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set_options(char *line, regmatch_t * m) |
234 |
lefcha |
1.11 |
{ |
235 |
lefcha |
1.48 |
if (!strncasecmp(line + m[2].rm_so, "logfile", 7)) { |
236 |
|
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if (*logfile == '\0') { |
237 |
|
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if (*(line + m[3].rm_so) == '"' && |
238 |
|
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*(line + m[3].rm_eo - 1) == '"') |
239 |
|
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strncat(logfile, line + m[3].rm_so + 1, |
240 |
|
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min((m[3].rm_eo - m[3].rm_so - 2), |
241 |
|
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PATH_MAX - 1)); |
242 |
|
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else |
243 |
|
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strncat(logfile, line + m[3].rm_so, |
244 |
|
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min((m[3].rm_eo - m[3].rm_so), |
245 |
|
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PATH_MAX - 1)); |
246 |
|
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} |
247 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "charset", 7)) { |
248 |
|
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if (*(line + m[3].rm_so) == '"' && |
249 |
|
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*(line + m[3].rm_eo - 1) == '"') |
250 |
|
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strncat(charset, line + m[3].rm_so + 1, |
251 |
|
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min((m[3].rm_eo - m[3].rm_so - 2), |
252 |
|
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CHARSET_LEN - 1)); |
253 |
|
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else |
254 |
|
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strncat(charset, line + m[3].rm_so, |
255 |
|
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min((m[3].rm_eo - m[3].rm_so), CHARSET_LEN - 1)); |
256 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "errors", 6)) { |
257 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
258 |
|
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options |= OPTION_ERRORS; |
259 |
|
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else |
260 |
|
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options &= ~(OPTION_ERRORS); |
261 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "expunge", 7)) { |
262 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
263 |
|
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options |= OPTION_EXPUNGE; |
264 |
|
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else |
265 |
|
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options &= ~(OPTION_EXPUNGE); |
266 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "header", 6)) { |
267 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
268 |
|
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options |= OPTION_HEADERS; |
269 |
|
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else |
270 |
|
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options &= ~(OPTION_HEADERS); |
271 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "namespace", 9)) { |
272 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
273 |
|
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options |= OPTION_NAMESPACE; |
274 |
|
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else |
275 |
|
|
options &= ~(OPTION_NAMESPACE); |
276 |
|
|
} else if (!strncasecmp(line + m[2].rm_so, "subscribe", 9)) { |
277 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
278 |
|
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options |= OPTION_SUBSCRIBE; |
279 |
|
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else |
280 |
|
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options &= ~(OPTION_SUBSCRIBE); |
281 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "warning", 7)) { |
282 |
|
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if (!strncasecmp(line + m[3].rm_so, "yes", 3)) |
283 |
|
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options |= OPTION_WARNING; |
284 |
|
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else |
285 |
|
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options &= ~(OPTION_WARNING); |
286 |
|
|
} else if (!strncasecmp(line + m[2].rm_so, "timeout", 7)) { |
287 |
|
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errno = 0; |
288 |
|
|
timeout = strtol(line + m[3].rm_so, NULL, 10); |
289 |
|
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if (errno) |
290 |
|
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timeout = 0; |
291 |
|
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} else if (!strncasecmp(line + m[2].rm_so, "daemon", 6) && |
292 |
|
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!(options & OPTION_DAEMON_MODE)) { |
293 |
|
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options |= OPTION_DAEMON_MODE; |
294 |
|
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errno = 0; |
295 |
|
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interval = strtoul(line + m[3].rm_so, NULL, 10); |
296 |
|
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if (errno) |
297 |
|
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interval = 0; |
298 |
|
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} |
299 |
lefcha |
1.1 |
} |
300 |
lefcha |
1.29 |
|
301 |
|
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|
302 |
|
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#ifdef ENCRYPTED_PASSWORDS |
303 |
|
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/* |
304 |
|
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* Open password file and call parse_passwords(). |
305 |
|
|
*/ |
306 |
lefcha |
1.48 |
int |
307 |
|
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read_passwords(void) |
308 |
lefcha |
1.29 |
{ |
309 |
lefcha |
1.48 |
FILE *fd; |
310 |
|
|
char pwfile[PATH_MAX]; |
311 |
lefcha |
1.38 |
|
312 |
lefcha |
1.48 |
if (!(flags & FLAG_BLANK_PASSWORD)) |
313 |
|
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return ERROR_CONFIG_PARSE; |
314 |
lefcha |
1.38 |
|
315 |
lefcha |
1.48 |
snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords"); |
316 |
lefcha |
1.29 |
#ifdef DEBUG |
317 |
lefcha |
1.48 |
fprintf(stderr, "debug: passwords file: '%s'\n", pwfile); |
318 |
lefcha |
1.29 |
#endif |
319 |
lefcha |
1.38 |
|
320 |
lefcha |
1.48 |
if (!exists_file(pwfile)) |
321 |
|
|
return ERROR_FILE_OPEN; |
322 |
lefcha |
1.38 |
|
323 |
lefcha |
1.29 |
#ifdef CHECK_PERMISSIONS |
324 |
lefcha |
1.48 |
check_file_perms(pwfile, S_IRUSR | S_IWUSR); |
325 |
lefcha |
1.29 |
#endif |
326 |
|
|
|
327 |
lefcha |
1.48 |
fd = fopen(pwfile, "r"); |
328 |
|
|
if (fd == NULL) |
329 |
|
|
fatal(ERROR_FILE_OPEN, "opening passwords file %s; %s\n", |
330 |
|
|
pwfile, strerror(errno)); |
331 |
lefcha |
1.29 |
|
332 |
lefcha |
1.48 |
parse_passwords(fd); |
333 |
lefcha |
1.29 |
|
334 |
lefcha |
1.48 |
fclose(fd); |
335 |
lefcha |
1.29 |
|
336 |
lefcha |
1.48 |
return 0; |
337 |
lefcha |
1.29 |
} |
338 |
|
|
|
339 |
|
|
|
340 |
|
|
/* |
341 |
|
|
* Parse unencrypted password file. |
342 |
|
|
*/ |
343 |
lefcha |
1.48 |
int |
344 |
|
|
parse_passwords(FILE * fd) |
345 |
lefcha |
1.29 |
{ |
346 |
lefcha |
1.48 |
int t; |
347 |
|
|
char *pe; |
348 |
|
|
char user[USERNAME_LEN], serv[SERVER_LEN]; |
349 |
|
|
unsigned char *buf; |
350 |
|
|
char *c, *cp, *line; |
351 |
|
|
regex_t creg; |
352 |
|
|
regmatch_t match[4]; |
353 |
|
|
const char *reg; |
354 |
|
|
int r; |
355 |
|
|
|
356 |
|
|
t = 3; |
357 |
|
|
pe = NULL; |
358 |
|
|
reg = "([[:alnum:].-]+) ([[:graph:]]+) ([[:graph:]]+)"; |
359 |
|
|
|
360 |
lefcha |
1.52 |
if (!passphr) { |
361 |
|
|
passphr = (char *)smalloc(PASSPHRASE_LEN); |
362 |
|
|
*passphr = '\0'; |
363 |
|
|
|
364 |
|
|
do { |
365 |
|
|
fseek(fd, 0L, SEEK_SET); |
366 |
|
|
printf("Enter master passphrase: "); |
367 |
|
|
get_password(passphr, PASSPHRASE_LEN); |
368 |
|
|
} while ((r = decrypt_passwords(&buf, fd)) && --t != 0); |
369 |
|
|
|
370 |
|
|
if (!t) |
371 |
|
|
return ERROR_PASSPHRASE; |
372 |
|
|
} else |
373 |
|
|
decrypt_passwords(&buf, fd); |
374 |
lefcha |
1.48 |
|
375 |
|
|
c = cp = sstrdup(buf); |
376 |
|
|
|
377 |
|
|
regcomp(&creg, reg, REG_EXTENDED | REG_ICASE); |
378 |
|
|
|
379 |
|
|
line = strtok_r(c, "\n", &c); |
380 |
|
|
while (line != NULL && !regexec(&creg, line, 4, match, 0)) { |
381 |
|
|
user[0] = serv[0] = '\0'; |
382 |
|
|
|
383 |
|
|
strncat(serv, line + match[1].rm_so, |
384 |
|
|
min(match[1].rm_eo - match[1].rm_so, SERVER_LEN - 1)); |
385 |
|
|
strncat(user, line + match[2].rm_so, |
386 |
|
|
min(match[2].rm_eo - match[2].rm_so, USERNAME_LEN - 1)); |
387 |
|
|
|
388 |
|
|
if ((pe = (char *)find_password(user, serv))) |
389 |
|
|
strncat(pe, line + match[3].rm_so, |
390 |
|
|
min(match[3].rm_eo - match[3].rm_so, |
391 |
|
|
PASSWORD_LEN - 1)); |
392 |
lefcha |
1.29 |
|
393 |
lefcha |
1.48 |
line = strtok_r(NULL, "\n", &c); |
394 |
|
|
} |
395 |
lefcha |
1.38 |
|
396 |
lefcha |
1.48 |
regfree(&creg); |
397 |
|
|
sfree(cp); |
398 |
|
|
sfree(buf); |
399 |
lefcha |
1.29 |
|
400 |
lefcha |
1.48 |
return 0; |
401 |
lefcha |
1.29 |
} |
402 |
|
|
|
403 |
|
|
|
404 |
|
|
/* |
405 |
|
|
* Store encrypted passwords to file. |
406 |
|
|
*/ |
407 |
lefcha |
1.48 |
int |
408 |
|
|
store_passwords(account_t * accts[]) |
409 |
lefcha |
1.29 |
{ |
410 |
lefcha |
1.48 |
char pwfile[PATH_MAX]; |
411 |
|
|
FILE *fd; |
412 |
lefcha |
1.29 |
|
413 |
lefcha |
1.48 |
snprintf(pwfile, PATH_MAX, "%s/%s", home, ".imapfilter/passwords"); |
414 |
lefcha |
1.38 |
|
415 |
lefcha |
1.48 |
create_file(pwfile, S_IRUSR | S_IWUSR); |
416 |
lefcha |
1.29 |
|
417 |
lefcha |
1.48 |
fd = fopen(pwfile, "w"); |
418 |
lefcha |
1.29 |
|
419 |
lefcha |
1.48 |
if (fd == NULL) |
420 |
|
|
fatal(ERROR_FILE_OPEN, "opening passwords file %s; %s\n", |
421 |
|
|
pwfile, strerror(errno)); |
422 |
lefcha |
1.38 |
|
423 |
lefcha |
1.48 |
encrypt_passwords(fd, accts); |
424 |
lefcha |
1.38 |
|
425 |
lefcha |
1.48 |
fclose(fd); |
426 |
lefcha |
1.29 |
|
427 |
lefcha |
1.48 |
return 0; |
428 |
lefcha |
1.29 |
} |
429 |
lefcha |
1.48 |
|
430 |
lefcha |
1.47 |
#endif /* ENCRYPTED_PASSWORDS */ |
431 |
lefcha |
1.31 |
|
432 |
|
|
|
433 |
|
|
/* |
434 |
|
|
* Create $HOME/.imapfilter directory. |
435 |
|
|
*/ |
436 |
lefcha |
1.48 |
int |
437 |
|
|
create_homedir(void) |
438 |
lefcha |
1.31 |
{ |
439 |
lefcha |
1.48 |
char *hdn; |
440 |
lefcha |
1.38 |
|
441 |
lefcha |
1.48 |
hdn = ".imapfilter"; |
442 |
lefcha |
1.31 |
|
443 |
lefcha |
1.48 |
if (home != NULL) |
444 |
|
|
if (chdir(home)) |
445 |
|
|
error("could not change directory; %s\n", |
446 |
|
|
strerror(errno)); |
447 |
|
|
|
448 |
lefcha |
1.49 |
if (!exists_dir(hdn)) { |
449 |
lefcha |
1.48 |
if (mkdir(hdn, S_IRUSR | S_IWUSR | S_IXUSR)) |
450 |
|
|
error("could not create directory %s; %s\n", hdn, |
451 |
|
|
strerror(errno)); |
452 |
lefcha |
1.49 |
} |
453 |
|
|
#ifdef CHECK_PERMISSIONS |
454 |
|
|
else { |
455 |
|
|
check_dir_perms(hdn, S_IRUSR | S_IWUSR | S_IXUSR); |
456 |
|
|
} |
457 |
|
|
#endif |
458 |
lefcha |
1.36 |
|
459 |
lefcha |
1.48 |
return 0; |
460 |
lefcha |
1.31 |
} |
461 |
|
|
|
462 |
|
|
|
463 |
|
|
/* |
464 |
|
|
* Check if a file exists. |
465 |
|
|
*/ |
466 |
lefcha |
1.48 |
int |
467 |
|
|
exists_file(char *fname) |
468 |
lefcha |
1.31 |
{ |
469 |
lefcha |
1.48 |
struct stat fs; |
470 |
lefcha |
1.38 |
|
471 |
lefcha |
1.48 |
if (access(fname, F_OK)) |
472 |
|
|
return 0; |
473 |
lefcha |
1.38 |
|
474 |
lefcha |
1.48 |
stat(fname, &fs); |
475 |
|
|
if (!S_ISREG(fs.st_mode)) { |
476 |
|
|
error("file %s not a regular file\n", fname); |
477 |
|
|
return ERROR_FILE_OPEN; |
478 |
|
|
} |
479 |
|
|
return 1; |
480 |
lefcha |
1.31 |
} |
481 |
|
|
|
482 |
|
|
|
483 |
lefcha |
1.38 |
/* |
484 |
lefcha |
1.31 |
* Check if a directory exists. |
485 |
|
|
*/ |
486 |
lefcha |
1.48 |
int |
487 |
|
|
exists_dir(char *dname) |
488 |
lefcha |
1.31 |
{ |
489 |
lefcha |
1.48 |
struct stat ds; |
490 |
lefcha |
1.38 |
|
491 |
lefcha |
1.48 |
if (access(dname, F_OK)) |
492 |
|
|
return 0; |
493 |
lefcha |
1.38 |
|
494 |
lefcha |
1.48 |
stat(dname, &ds); |
495 |
|
|
if (!S_ISDIR(ds.st_mode)) { |
496 |
|
|
error("file %s not a directory\n", dname); |
497 |
|
|
return ERROR_FILE_OPEN; |
498 |
|
|
} |
499 |
|
|
return 1; |
500 |
lefcha |
1.31 |
} |
501 |
|
|
|
502 |
|
|
|
503 |
|
|
/* |
504 |
lefcha |
1.36 |
* Create a file with the specified permissions. |
505 |
lefcha |
1.31 |
*/ |
506 |
lefcha |
1.48 |
int |
507 |
|
|
create_file(char *fname, mode_t mode) |
508 |
lefcha |
1.31 |
{ |
509 |
lefcha |
1.48 |
int fd; |
510 |
|
|
|
511 |
|
|
fd = 0; |
512 |
lefcha |
1.38 |
|
513 |
lefcha |
1.48 |
if (!exists_file(fname)) { |
514 |
|
|
fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode); |
515 |
|
|
if (fd == -1) { |
516 |
|
|
error("could not create file %s; %s\n", fname, |
517 |
|
|
strerror(errno)); |
518 |
|
|
return ERROR_FILE_OPEN; |
519 |
|
|
} |
520 |
|
|
close(fd); |
521 |
|
|
} |
522 |
|
|
return 0; |
523 |
lefcha |
1.31 |
} |
524 |
|
|
|
525 |
|
|
|
526 |
|
|
#ifdef CHECK_PERMISSIONS |
527 |
|
|
/* |
528 |
|
|
* Check the permissions of a file. |
529 |
|
|
*/ |
530 |
lefcha |
1.48 |
int |
531 |
|
|
check_file_perms(char *fname, mode_t mode) |
532 |
lefcha |
1.31 |
{ |
533 |
lefcha |
1.48 |
struct stat fs; |
534 |
lefcha |
1.38 |
|
535 |
lefcha |
1.48 |
if (stat(fname, &fs)) { |
536 |
|
|
error("getting file %s status; %s\n", fname, |
537 |
|
|
strerror(errno)); |
538 |
|
|
return ERROR_TRIVIAL; |
539 |
|
|
} |
540 |
|
|
if (!S_ISREG(fs.st_mode)) { |
541 |
|
|
error("file %s not a regular file\n", fname); |
542 |
|
|
return ERROR_TRIVIAL; |
543 |
|
|
} |
544 |
|
|
if ((fs.st_mode & 00777) != mode) { |
545 |
|
|
error("warning: improper file %s permissions\n", fname); |
546 |
|
|
error("warning: file's mode should be %o not %o\n", mode, |
547 |
|
|
fs.st_mode & 00777); |
548 |
|
|
return ERROR_TRIVIAL; |
549 |
|
|
} |
550 |
|
|
return 0; |
551 |
lefcha |
1.31 |
} |
552 |
|
|
|
553 |
|
|
|
554 |
|
|
/* |
555 |
|
|
* Check the permissions of a directory. |
556 |
|
|
*/ |
557 |
lefcha |
1.48 |
int |
558 |
|
|
check_dir_perms(char *dname, mode_t mode) |
559 |
lefcha |
1.31 |
{ |
560 |
lefcha |
1.48 |
struct stat ds; |
561 |
lefcha |
1.31 |
|
562 |
lefcha |
1.48 |
if (stat(dname, &ds)) { |
563 |
|
|
error("getting file %s status; %s\n", dname, |
564 |
|
|
strerror(errno)); |
565 |
|
|
return ERROR_TRIVIAL; |
566 |
|
|
} |
567 |
|
|
if (!S_ISDIR(ds.st_mode)) { |
568 |
|
|
error("file %s not a directory\n", dname); |
569 |
|
|
return ERROR_TRIVIAL; |
570 |
|
|
} |
571 |
|
|
if ((ds.st_mode & 00777) != mode) { |
572 |
|
|
error("warning: improper dir %s permissions\n", dname); |
573 |
lefcha |
1.50 |
error("warning: dir's mode should be %o not %o\n", mode, |
574 |
lefcha |
1.48 |
ds.st_mode & 00777); |
575 |
|
|
return ERROR_TRIVIAL; |
576 |
|
|
} |
577 |
|
|
return 0; |
578 |
lefcha |
1.31 |
} |
579 |
lefcha |
1.38 |
|
580 |
lefcha |
1.47 |
#endif /* CHECK_PERMISSIONS */ |
581 |
lefcha |
1.50 |
|
582 |
|
|
|
583 |
|
|
#ifdef SSL_TLS |
584 |
|
|
/* |
585 |
|
|
* Get SSL/TLS certificate check it, maybe ask user about it and act |
586 |
|
|
* accordingly. |
587 |
|
|
*/ |
588 |
|
|
int |
589 |
|
|
imf_ssl_cert(SSL * ssl) |
590 |
|
|
{ |
591 |
|
|
X509 *cert; |
592 |
|
|
unsigned char md[EVP_MAX_MD_SIZE]; |
593 |
|
|
unsigned int mdlen; |
594 |
|
|
|
595 |
|
|
mdlen = 0; |
596 |
|
|
|
597 |
|
|
if (!(cert = SSL_get_peer_certificate(ssl))) |
598 |
|
|
return ERROR_SSL; |
599 |
|
|
|
600 |
|
|
if (!(X509_digest(cert, EVP_md5(), md, &mdlen))) |
601 |
|
|
return ERROR_SSL; |
602 |
|
|
|
603 |
|
|
switch (imf_ssl_check_cert(cert, md, &mdlen)) { |
604 |
|
|
case SSL_CERT_NONEXISTENT: |
605 |
|
|
imf_ssl_print_cert(cert, md, &mdlen); |
606 |
lefcha |
1.51 |
if (flags & FLAG_DAEMON_MODE || |
607 |
|
|
imf_ssl_new_cert(cert) == SSL_CERT_ACTION_REJECT) |
608 |
lefcha |
1.50 |
goto abort; |
609 |
|
|
break; |
610 |
|
|
case SSL_CERT_MISMATCH: |
611 |
|
|
imf_ssl_print_cert(cert, md, &mdlen); |
612 |
lefcha |
1.51 |
if (flags & FLAG_DAEMON_MODE || |
613 |
|
|
imf_ssl_cert_mismatch() == SSL_CERT_ACTION_ABORT) |
614 |
lefcha |
1.50 |
goto abort; |
615 |
|
|
break; |
616 |
|
|
case SSL_CERT_OK: |
617 |
|
|
if (options & OPTION_DETAILS_VERBOSE) |
618 |
|
|
imf_ssl_print_cert(cert, md, &mdlen); |
619 |
|
|
} |
620 |
|
|
|
621 |
|
|
X509_free(cert); |
622 |
|
|
return 0; |
623 |
|
|
|
624 |
|
|
abort: |
625 |
|
|
X509_free(cert); |
626 |
|
|
return ERROR_SSL; |
627 |
|
|
} |
628 |
|
|
|
629 |
|
|
|
630 |
|
|
/* |
631 |
|
|
* Check if the SSL/TLS certificate exists in the certificates file. |
632 |
|
|
*/ |
633 |
|
|
int |
634 |
|
|
imf_ssl_check_cert(X509 * pcert, unsigned char *pmd, unsigned int *pmdlen) |
635 |
|
|
{ |
636 |
|
|
int r; |
637 |
|
|
FILE *fd; |
638 |
|
|
X509 *cert; |
639 |
|
|
unsigned char md[EVP_MAX_MD_SIZE]; |
640 |
|
|
unsigned int mdlen; |
641 |
|
|
char *cfn; |
642 |
|
|
|
643 |
|
|
r = SSL_CERT_NONEXISTENT; |
644 |
|
|
cert = NULL; |
645 |
|
|
cfn = ".imapfilter/certificates"; |
646 |
|
|
|
647 |
|
|
if (!exists_file(cfn)) |
648 |
|
|
return SSL_CERT_NONEXISTENT; |
649 |
|
|
|
650 |
|
|
fd = fopen(cfn, "r"); |
651 |
|
|
if (fd == NULL) |
652 |
|
|
return ERROR_FILE_OPEN; |
653 |
|
|
|
654 |
|
|
while ((cert = PEM_read_X509(fd, &cert, NULL, NULL)) != NULL) { |
655 |
|
|
if (X509_subject_name_cmp(cert, pcert) != 0 || |
656 |
|
|
X509_issuer_name_cmp(cert, pcert) != 0) |
657 |
|
|
continue; |
658 |
|
|
|
659 |
|
|
if (!X509_digest(cert, EVP_md5(), md, &mdlen) || |
660 |
|
|
*pmdlen != mdlen) |
661 |
|
|
continue; |
662 |
|
|
|
663 |
|
|
if (memcmp(pmd, md, mdlen) != 0) { |
664 |
|
|
r = SSL_CERT_MISMATCH; |
665 |
|
|
break; |
666 |
|
|
} |
667 |
|
|
r = SSL_CERT_OK; |
668 |
|
|
break; |
669 |
|
|
} |
670 |
|
|
|
671 |
|
|
fclose(fd); |
672 |
|
|
X509_free(cert); |
673 |
|
|
|
674 |
|
|
return r; |
675 |
|
|
} |
676 |
|
|
|
677 |
|
|
|
678 |
|
|
/* |
679 |
|
|
* Print information about the SSL/TLS certificate. |
680 |
|
|
*/ |
681 |
|
|
void |
682 |
|
|
imf_ssl_print_cert(X509 * cert, unsigned char *md, unsigned int *mdlen) |
683 |
|
|
{ |
684 |
|
|
unsigned int i; |
685 |
|
|
char *c; |
686 |
|
|
|
687 |
|
|
c = X509_NAME_oneline(X509_get_subject_name(cert), NULL, 0); |
688 |
|
|
printf("Server certificate subject: %s\n", c); |
689 |
|
|
xfree(c); |
690 |
|
|
|
691 |
|
|
c = X509_NAME_oneline(X509_get_issuer_name(cert), NULL, 0); |
692 |
|
|
printf("Server certificate issuer: %s\n", c); |
693 |
|
|
xfree(c); |
694 |
|
|
|
695 |
|
|
printf("Server key fingerprint: "); |
696 |
|
|
for (i = 0; i < *mdlen; i++) |
697 |
|
|
printf(i != *mdlen - 1 ? "%02X:" : "%02X\n", md[i]); |
698 |
|
|
} |
699 |
|
|
|
700 |
|
|
|
701 |
|
|
/* |
702 |
|
|
* Ask the user to reject/accept the SSL/TLS certificate. |
703 |
|
|
*/ |
704 |
|
|
int |
705 |
|
|
imf_ssl_new_cert(X509 * cert) |
706 |
|
|
{ |
707 |
|
|
FILE *fd; |
708 |
|
|
char c, *cfn, buf[LINE_MAX]; |
709 |
|
|
|
710 |
|
|
do { |
711 |
|
|
printf("(R)eject, accept (t)emporarily or " |
712 |
|
|
"accept (p)ermanently? "); |
713 |
|
|
fgets(buf, LINE_MAX, stdin); |
714 |
|
|
c = tolower(*buf); |
715 |
|
|
} while (c != 'r' && c != 't' && c != 'p'); |
716 |
|
|
|
717 |
|
|
if (c == 'r') |
718 |
|
|
return SSL_CERT_ACTION_REJECT; |
719 |
|
|
else if (c == 't') |
720 |
|
|
return SSL_CERT_ACTION_ACCEPT; |
721 |
|
|
|
722 |
|
|
cfn = ".imapfilter/certificates"; |
723 |
|
|
|
724 |
|
|
create_file(cfn, S_IRUSR | S_IWUSR); |
725 |
|
|
|
726 |
|
|
fd = fopen(cfn, "a"); |
727 |
|
|
if (fd == NULL) |
728 |
|
|
return SSL_CERT_ACTION_REJECT; |
729 |
|
|
|
730 |
|
|
PEM_write_X509(fd, cert); |
731 |
|
|
|
732 |
|
|
fclose(fd); |
733 |
|
|
|
734 |
|
|
return SSL_CERT_ACTION_ACCEPT; |
735 |
|
|
} |
736 |
|
|
|
737 |
|
|
|
738 |
|
|
/* |
739 |
|
|
* Ask user to proceed, while a fingerprint mismatch in the SSL/TLS |
740 |
|
|
* certificate was found. |
741 |
|
|
*/ |
742 |
|
|
int |
743 |
|
|
imf_ssl_cert_mismatch(void) |
744 |
|
|
{ |
745 |
|
|
char c, buf[LINE_MAX]; |
746 |
|
|
|
747 |
|
|
do { |
748 |
|
|
printf("WARNING: SSL/TLS certificate fingerprint mismatch.\n" |
749 |
|
|
"Proceed with the connection (y/n)? "); |
750 |
|
|
fgets(buf, LINE_MAX, stdin); |
751 |
|
|
c = tolower(*buf); |
752 |
|
|
} while (c != 'y' && c != 'n'); |
753 |
|
|
|
754 |
|
|
if (c == 'y') |
755 |
|
|
return SSL_CERT_ACTION_CONTINUE; |
756 |
|
|
else |
757 |
|
|
return SSL_CERT_ACTION_ABORT; |
758 |
|
|
} |
759 |
|
|
|
760 |
|
|
#endif /* SSL_TLS */ |