2 * uxstore.c: Unix-specific implementation of the interface defined
17 #include <sys/types.h>
23 #define FNLEN PATH_MAX
25 #define FNLEN 1024 /* XXX */
29 INDEX_DIR
, INDEX_HOSTKEYS
, INDEX_HOSTKEYS_TMP
, INDEX_RANDSEED
,
30 INDEX_SESSIONDIR
, INDEX_SESSION
,
33 static const char hex
[16] = "0123456789ABCDEF";
35 static char *mungestr(const char *in
)
40 in
= "Default Settings";
42 ret
= out
= snewn(3*strlen(in
)+1, char);
46 * There are remarkably few punctuation characters that
47 * aren't shell-special in some way or likely to be used as
48 * separators in some file format or another! Hence we use
49 * opt-in for safe characters rather than opt-out for
50 * specific unsafe ones...
52 if (*in
!='+' && *in
!='-' && *in
!='.' && *in
!='@' && *in
!='_' &&
53 !(*in
>= '0' && *in
<= '9') &&
54 !(*in
>= 'A' && *in
<= 'Z') &&
55 !(*in
>= 'a' && *in
<= 'z')) {
57 *out
++ = hex
[((unsigned char) *in
) >> 4];
58 *out
++ = hex
[((unsigned char) *in
) & 15];
67 static char *unmungestr(const char *in
)
70 out
= ret
= snewn(strlen(in
)+1, char);
72 if (*in
== '%' && in
[1] && in
[2]) {
80 *out
++ = (i
<< 4) + j
;
90 static void make_filename(char *filename
, int index
, const char *subname
)
94 home
= getenv("HOME");
97 strncpy(filename
, home
, FNLEN
);
98 len
= strlen(filename
);
99 if (index
== INDEX_SESSION
) {
100 char *munged
= mungestr(subname
);
101 char *fn
= dupprintf("/.putty/sessions/%s", munged
);
102 strncpy(filename
+ len
, fn
, FNLEN
- len
);
106 strncpy(filename
+ len
,
107 index
== INDEX_DIR ?
"/.putty" :
108 index
== INDEX_SESSIONDIR ?
"/.putty/sessions" :
109 index
== INDEX_HOSTKEYS ?
"/.putty/sshhostkeys" :
110 index
== INDEX_HOSTKEYS_TMP ?
"/.putty/sshhostkeys.tmp" :
111 index
== INDEX_RANDSEED ?
"/.putty/randomseed" :
112 "/.putty/ERROR", FNLEN
- len
);
114 filename
[FNLEN
-1] = '\0';
117 void *open_settings_w(const char *sessionname
, char **errmsg
)
119 char filename
[FNLEN
];
125 * Start by making sure the .putty directory and its sessions
126 * subdir actually exist. Ignore error returns from mkdir since
127 * they're perfectly likely to be `already exists', and any
128 * other error will trip us up later on so there's no real need
131 make_filename(filename
, INDEX_DIR
, sessionname
);
132 mkdir(filename
, 0700);
133 make_filename(filename
, INDEX_SESSIONDIR
, sessionname
);
134 mkdir(filename
, 0700);
136 make_filename(filename
, INDEX_SESSION
, sessionname
);
137 fp
= fopen(filename
, "w");
139 *errmsg
= dupprintf("Unable to create %s: %s",
140 filename
, strerror(errno
));
141 return NULL
; /* can't open */
146 void write_setting_s(void *handle
, const char *key
, const char *value
)
148 FILE *fp
= (FILE *)handle
;
149 fprintf(fp
, "%s=%s\n", key
, value
);
152 void write_setting_i(void *handle
, const char *key
, int value
)
154 FILE *fp
= (FILE *)handle
;
155 fprintf(fp
, "%s=%d\n", key
, value
);
158 void close_settings_w(void *handle
)
160 FILE *fp
= (FILE *)handle
;
165 * Reading settings, for the moment, is done by retrieving X
166 * resources from the X display. When we introduce disk files, I
167 * think what will happen is that the X resources will override
168 * PuTTY's inbuilt defaults, but that the disk files will then
169 * override those. This isn't optimal, but it's the best I can
170 * immediately work out.
171 * FIXME: the above comment is a bit out of date. Did it happen?
179 static tree234
*xrmtree
= NULL
;
181 int keycmp(void *av
, void *bv
)
183 struct keyval
*a
= (struct keyval
*)av
;
184 struct keyval
*b
= (struct keyval
*)bv
;
185 return strcmp(a
->key
, b
->key
);
188 void provide_xrm_string(char *string
)
191 struct keyval
*xrms
, *ret
;
193 p
= q
= strchr(string
, ':');
195 fprintf(stderr
, "pterm: expected a colon in resource string"
196 " \"%s\"\n", string
);
200 while (p
> string
&& p
[-1] != '.' && p
[-1] != '*')
202 xrms
= snew(struct keyval
);
203 key
= snewn(q
-p
, char);
207 while (*q
&& isspace((unsigned char)*q
))
209 xrms
->value
= dupstr(q
);
212 xrmtree
= newtree234(keycmp
);
214 ret
= add234(xrmtree
, xrms
);
216 /* Override an existing string. */
217 del234(xrmtree
, ret
);
218 add234(xrmtree
, xrms
);
222 const char *get_setting(const char *key
)
224 struct keyval tmp
, *ret
;
227 ret
= find234(xrmtree
, &tmp
, NULL
);
231 return x_get_default(key
);
234 void *open_settings_r(const char *sessionname
)
236 char filename
[FNLEN
];
241 make_filename(filename
, INDEX_SESSION
, sessionname
);
242 fp
= fopen(filename
, "r");
244 return NULL
; /* can't open */
246 ret
= newtree234(keycmp
);
248 while ( (line
= fgetline(fp
)) ) {
249 char *value
= strchr(line
, '=');
255 value
[strcspn(value
, "\r\n")] = '\0'; /* trim trailing NL */
257 kv
= snew(struct keyval
);
258 kv
->key
= dupstr(line
);
259 kv
->value
= dupstr(value
);
270 char *read_setting_s(void *handle
, const char *key
, char *buffer
, int buflen
)
272 tree234
*tree
= (tree234
*)handle
;
274 struct keyval tmp
, *kv
;
278 (kv
= find234(tree
, &tmp
, NULL
)) != NULL
) {
282 val
= get_setting(key
);
287 strncpy(buffer
, val
, buflen
);
288 buffer
[buflen
-1] = '\0';
293 int read_setting_i(void *handle
, const char *key
, int defvalue
)
295 tree234
*tree
= (tree234
*)handle
;
297 struct keyval tmp
, *kv
;
301 (kv
= find234(tree
, &tmp
, NULL
)) != NULL
) {
305 val
= get_setting(key
);
313 int read_setting_fontspec(void *handle
, const char *name
, FontSpec
*result
)
315 return !!read_setting_s(handle
, name
, result
->name
, sizeof(result
->name
));
317 int read_setting_filename(void *handle
, const char *name
, Filename
*result
)
319 return !!read_setting_s(handle
, name
, result
->path
, sizeof(result
->path
));
322 void write_setting_fontspec(void *handle
, const char *name
, FontSpec result
)
324 write_setting_s(handle
, name
, result
.name
);
326 void write_setting_filename(void *handle
, const char *name
, Filename result
)
328 write_setting_s(handle
, name
, result
.path
);
331 void close_settings_r(void *handle
)
333 tree234
*tree
= (tree234
*)handle
;
339 while ( (kv
= index234(tree
, 0)) != NULL
) {
341 sfree((char *)kv
->key
);
342 sfree((char *)kv
->value
);
349 void del_settings(const char *sessionname
)
351 char filename
[FNLEN
];
352 make_filename(filename
, INDEX_SESSION
, sessionname
);
356 void *enum_settings_start(void)
359 char filename
[FNLEN
];
361 make_filename(filename
, INDEX_SESSIONDIR
, NULL
);
362 dp
= opendir(filename
);
367 char *enum_settings_next(void *handle
, char *buffer
, int buflen
)
369 DIR *dp
= (DIR *)handle
;
372 char fullpath
[FNLEN
];
376 make_filename(fullpath
, INDEX_SESSIONDIR
, NULL
);
377 len
= strlen(fullpath
);
379 while ( (de
= readdir(dp
)) != NULL
) {
382 strncpy(fullpath
+len
+1, de
->d_name
, FNLEN
-(len
+1));
383 fullpath
[FNLEN
-1] = '\0';
386 if (stat(fullpath
, &st
) < 0 || !S_ISREG(st
.st_mode
))
387 continue; /* try another one */
389 unmunged
= unmungestr(de
->d_name
);
390 strncpy(buffer
, unmunged
, buflen
);
391 buffer
[buflen
-1] = '\0';
399 void enum_settings_finish(void *handle
)
401 DIR *dp
= (DIR *)handle
;
406 * Lines in the host keys file are of the form
408 * type@port:hostname keydata
412 * rsa@22:foovax.example.org 0x23,0x293487364395345345....2343
414 int verify_host_key(const char *hostname
, int port
,
415 const char *keytype
, const char *key
)
418 char filename
[FNLEN
];
422 make_filename(filename
, INDEX_HOSTKEYS
, NULL
);
423 fp
= fopen(filename
, "r");
425 return 1; /* key does not exist */
428 while ( (line
= fgetline(fp
)) ) {
433 line
[strcspn(line
, "\n")] = '\0'; /* strip trailing newline */
436 if (strncmp(p
, keytype
, i
))
444 sprintf(porttext
, "%d", port
);
445 i
= strlen(porttext
);
446 if (strncmp(p
, porttext
, i
))
454 i
= strlen(hostname
);
455 if (strncmp(p
, hostname
, i
))
464 * Found the key. Now just work out whether it's the right
468 ret
= 0; /* key matched OK */
470 ret
= 2; /* key mismatch */
482 void store_host_key(const char *hostname
, int port
,
483 const char *keytype
, const char *key
)
486 char *newtext
, *line
;
488 char filename
[FNLEN
], tmpfilename
[FNLEN
];
490 newtext
= dupprintf("%s@%d:%s %s\n", keytype
, port
, hostname
, key
);
491 headerlen
= 1 + strcspn(newtext
, " "); /* count the space too */
494 * Open both the old file and a new file.
496 make_filename(tmpfilename
, INDEX_HOSTKEYS_TMP
, NULL
);
497 wfp
= fopen(tmpfilename
, "w");
501 make_filename(dir
, INDEX_DIR
, NULL
);
503 wfp
= fopen(tmpfilename
, "w");
507 make_filename(filename
, INDEX_HOSTKEYS
, NULL
);
508 rfp
= fopen(filename
, "r");
511 * Copy all lines from the old file to the new one that _don't_
512 * involve the same host key identifier as the one we're adding.
515 while ( (line
= fgetline(rfp
)) ) {
516 if (strncmp(line
, newtext
, headerlen
))
523 * Now add the new line at the end.
529 rename(tmpfilename
, filename
);
534 void read_random_seed(noise_consumer_t consumer
)
539 make_filename(fname
, INDEX_RANDSEED
, NULL
);
540 fd
= open(fname
, O_RDONLY
);
544 while ( (ret
= read(fd
, buf
, sizeof(buf
))) > 0)
550 void write_random_seed(void *data
, int len
)
555 make_filename(fname
, INDEX_RANDSEED
, NULL
);
557 * Don't truncate the random seed file if it already exists; if
558 * something goes wrong half way through writing it, it would
559 * be better to leave the old data there than to leave it empty.
561 fd
= open(fname
, O_CREAT
| O_WRONLY
, 0600);
565 make_filename(dir
, INDEX_DIR
, NULL
);
567 fd
= open(fname
, O_CREAT
| O_WRONLY
, 0600);
571 int ret
= write(fd
, data
, len
);
574 data
= (char *)data
+ len
;
580 void cleanup_all(void)