2 * uxstore.c: Unix-specific implementation of the interface defined
16 #include <sys/types.h>
22 INDEX_DIR, INDEX_HOSTKEYS, INDEX_HOSTKEYS_TMP, INDEX_RANDSEED,
23 INDEX_SESSIONDIR, INDEX_SESSION,
26 static const char hex[16] = "0123456789ABCDEF";
28 static char *mungestr(const char *in)
33 in = "Default Settings";
35 ret = out = snewn(3*strlen(in)+1, char);
39 * There are remarkably few punctuation characters that
40 * aren't shell-special in some way or likely to be used as
41 * separators in some file format or another! Hence we use
42 * opt-in for safe characters rather than opt-out for
43 * specific unsafe ones...
45 if (*in!='+' && *in!='-' && *in!='.' && *in!='@' && *in!='_' &&
46 !(*in >= '0' && *in <= '9') &&
47 !(*in >= 'A' && *in <= 'Z') &&
48 !(*in >= 'a' && *in <= 'z')) {
50 *out++ = hex[((unsigned char) *in) >> 4];
51 *out++ = hex[((unsigned char) *in) & 15];
60 static char *unmungestr(const char *in)
63 out = ret = snewn(strlen(in)+1, char);
65 if (*in == '%' && in[1] && in[2]) {
73 *out++ = (i << 4) + j;
83 static void make_filename(char *filename, int index, const char *subname)
87 home = getenv("HOME");
90 strncpy(filename, home, FILENAME_MAX);
91 len = strlen(filename);
92 if (index == INDEX_SESSION) {
93 char *munged = mungestr(subname);
94 char *fn = dupprintf("/.putty/sessions/%s", munged);
95 strncpy(filename + len, fn, FILENAME_MAX - len);
99 strncpy(filename + len,
100 index == INDEX_DIR ? "/.putty" :
101 index == INDEX_SESSIONDIR ? "/.putty/sessions" :
102 index == INDEX_HOSTKEYS ? "/.putty/sshhostkeys" :
103 index == INDEX_HOSTKEYS_TMP ? "/.putty/sshhostkeys.tmp" :
104 index == INDEX_RANDSEED ? "/.putty/randomseed" :
105 "/.putty/ERROR", FILENAME_MAX - len);
107 filename[FILENAME_MAX-1] = '\0';
110 void *open_settings_w(const char *sessionname, char **errmsg)
112 char filename[FILENAME_MAX];
118 * Start by making sure the .putty directory and its sessions
119 * subdir actually exist. Ignore error returns from mkdir since
120 * they're perfectly likely to be `already exists', and any
121 * other error will trip us up later on so there's no real need
124 make_filename(filename, INDEX_DIR, sessionname);
125 mkdir(filename, 0700);
126 make_filename(filename, INDEX_SESSIONDIR, sessionname);
127 mkdir(filename, 0700);
129 make_filename(filename, INDEX_SESSION, sessionname);
130 fp = fopen(filename, "w");
132 *errmsg = dupprintf("Unable to create %s: %s",
133 filename, strerror(errno));
134 return NULL; /* can't open */
139 void write_setting_s(void *handle, const char *key, const char *value)
141 FILE *fp = (FILE *)handle;
142 fprintf(fp, "%s=%s\n", key, value);
145 void write_setting_i(void *handle, const char *key, int value)
147 FILE *fp = (FILE *)handle;
148 fprintf(fp, "%s=%d\n", key, value);
151 void close_settings_w(void *handle)
153 FILE *fp = (FILE *)handle;
158 * Reading settings, for the moment, is done by retrieving X
159 * resources from the X display. When we introduce disk files, I
160 * think what will happen is that the X resources will override
161 * PuTTY's inbuilt defaults, but that the disk files will then
162 * override those. This isn't optimal, but it's the best I can
163 * immediately work out.
164 * FIXME: the above comment is a bit out of date. Did it happen?
172 static tree234 *xrmtree = NULL;
174 int keycmp(void *av, void *bv)
176 struct keyval *a = (struct keyval *)av;
177 struct keyval *b = (struct keyval *)bv;
178 return strcmp(a->key, b->key);
181 void provide_xrm_string(char *string)
184 struct keyval *xrms, *ret;
186 p = q = strchr(string, ':');
188 fprintf(stderr, "pterm: expected a colon in resource string"
189 " \"%s\"\n", string);
193 while (p > string && p[-1] != '.' && p[-1] != '*')
195 xrms = snew(struct keyval);
196 key = snewn(q-p, char);
200 while (*q && isspace((unsigned char)*q))
202 xrms->value = dupstr(q);
205 xrmtree = newtree234(keycmp);
207 ret = add234(xrmtree, xrms);
209 /* Override an existing string. */
210 del234(xrmtree, ret);
211 add234(xrmtree, xrms);
215 const char *get_setting(const char *key)
217 struct keyval tmp, *ret;
220 ret = find234(xrmtree, &tmp, NULL);
224 return x_get_default(key);
227 void *open_settings_r(const char *sessionname)
229 char filename[FILENAME_MAX];
234 make_filename(filename, INDEX_SESSION, sessionname);
235 fp = fopen(filename, "r");
237 return NULL; /* can't open */
239 ret = newtree234(keycmp);
241 while ( (line = fgetline(fp)) ) {
242 char *value = strchr(line, '=');
248 value[strcspn(value, "\r\n")] = '\0'; /* trim trailing NL */
250 kv = snew(struct keyval);
251 kv->key = dupstr(line);
252 kv->value = dupstr(value);
263 char *read_setting_s(void *handle, const char *key, char *buffer, int buflen)
265 tree234 *tree = (tree234 *)handle;
267 struct keyval tmp, *kv;
271 (kv = find234(tree, &tmp, NULL)) != NULL) {
275 val = get_setting(key);
280 strncpy(buffer, val, buflen);
281 buffer[buflen-1] = '\0';
286 int read_setting_i(void *handle, const char *key, int defvalue)
288 tree234 *tree = (tree234 *)handle;
290 struct keyval tmp, *kv;
294 (kv = find234(tree, &tmp, NULL)) != NULL) {
298 val = get_setting(key);
306 int read_setting_fontspec(void *handle, const char *name, FontSpec *result)
308 return !!read_setting_s(handle, name, result->name, sizeof(result->name));
310 int read_setting_filename(void *handle, const char *name, Filename *result)
312 return !!read_setting_s(handle, name, result->path, sizeof(result->path));
315 void write_setting_fontspec(void *handle, const char *name, FontSpec result)
317 write_setting_s(handle, name, result.name);
319 void write_setting_filename(void *handle, const char *name, Filename result)
321 write_setting_s(handle, name, result.path);
324 void close_settings_r(void *handle)
326 tree234 *tree = (tree234 *)handle;
332 while ( (kv = index234(tree, 0)) != NULL) {
334 sfree((char *)kv->key);
335 sfree((char *)kv->value);
342 void del_settings(const char *sessionname)
344 char filename[FILENAME_MAX];
345 make_filename(filename, INDEX_SESSION, sessionname);
349 void *enum_settings_start(void)
352 char filename[FILENAME_MAX];
354 make_filename(filename, INDEX_SESSIONDIR, NULL);
355 dp = opendir(filename);
360 char *enum_settings_next(void *handle, char *buffer, int buflen)
362 DIR *dp = (DIR *)handle;
365 char fullpath[FILENAME_MAX];
369 make_filename(fullpath, INDEX_SESSIONDIR, NULL);
370 len = strlen(fullpath);
372 while ( (de = readdir(dp)) != NULL ) {
373 if (len < FILENAME_MAX) {
375 strncpy(fullpath+len+1, de->d_name, FILENAME_MAX-(len+1));
376 fullpath[FILENAME_MAX-1] = '\0';
379 if (stat(fullpath, &st) < 0 || !S_ISREG(st.st_mode))
380 continue; /* try another one */
382 unmunged = unmungestr(de->d_name);
383 strncpy(buffer, unmunged, buflen);
384 buffer[buflen-1] = '\0';
392 void enum_settings_finish(void *handle)
394 DIR *dp = (DIR *)handle;
399 * Lines in the host keys file are of the form
401 * type@port:hostname keydata
405 * rsa@22:foovax.example.org 0x23,0x293487364395345345....2343
407 int verify_host_key(const char *hostname, int port,
408 const char *keytype, const char *key)
411 char filename[FILENAME_MAX];
415 make_filename(filename, INDEX_HOSTKEYS, NULL);
416 fp = fopen(filename, "r");
418 return 1; /* key does not exist */
421 while ( (line = fgetline(fp)) ) {
426 line[strcspn(line, "\n")] = '\0'; /* strip trailing newline */
429 if (strncmp(p, keytype, i))
437 sprintf(porttext, "%d", port);
438 i = strlen(porttext);
439 if (strncmp(p, porttext, i))
447 i = strlen(hostname);
448 if (strncmp(p, hostname, i))
457 * Found the key. Now just work out whether it's the right
461 ret = 0; /* key matched OK */
463 ret = 2; /* key mismatch */
475 void store_host_key(const char *hostname, int port,
476 const char *keytype, const char *key)
479 char *newtext, *line;
481 char filename[FILENAME_MAX], tmpfilename[FILENAME_MAX];
483 newtext = dupprintf("%s@%d:%s %s\n", keytype, port, hostname, key);
484 headerlen = 1 + strcspn(newtext, " "); /* count the space too */
487 * Open both the old file and a new file.
489 make_filename(tmpfilename, INDEX_HOSTKEYS_TMP, NULL);
490 wfp = fopen(tmpfilename, "w");
492 char dir[FILENAME_MAX];
494 make_filename(dir, INDEX_DIR, NULL);
496 wfp = fopen(tmpfilename, "w");
500 make_filename(filename, INDEX_HOSTKEYS, NULL);
501 rfp = fopen(filename, "r");
504 * Copy all lines from the old file to the new one that _don't_
505 * involve the same host key identifier as the one we're adding.
508 while ( (line = fgetline(rfp)) ) {
509 if (strncmp(line, newtext, headerlen))
516 * Now add the new line at the end.
522 rename(tmpfilename, filename);
527 void read_random_seed(noise_consumer_t consumer)
530 char fname[FILENAME_MAX];
532 make_filename(fname, INDEX_RANDSEED, NULL);
533 fd = open(fname, O_RDONLY);
537 while ( (ret = read(fd, buf, sizeof(buf))) > 0)
543 void write_random_seed(void *data, int len)
546 char fname[FILENAME_MAX];
548 make_filename(fname, INDEX_RANDSEED, NULL);
550 * Don't truncate the random seed file if it already exists; if
551 * something goes wrong half way through writing it, it would
552 * be better to leave the old data there than to leave it empty.
554 fd = open(fname, O_CREAT | O_WRONLY, 0600);
556 char dir[FILENAME_MAX];
558 make_filename(dir, INDEX_DIR, NULL);
560 fd = open(fname, O_CREAT | O_WRONLY, 0600);
564 int ret = write(fd, data, len);
567 data = (char *)data + len;
573 void cleanup_all(void)