#include <stdio.h>
#include <stdlib.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
#include "putty.h"
#include "storage.h"
+#include "tree234.h"
-/* FIXME. For the moment, we do nothing at all here. */
+/*
+ * For the moment, the only existing Unix utility is pterm and that
+ * has no GUI configuration at all, so our write routines need do
+ * nothing. Eventually I suppose these will read and write an rc
+ * file somewhere or other.
+ */
void *open_settings_w(char *sessionname)
{
{
}
+/*
+ * Reading settings, for the moment, is done by retrieving X
+ * resources from the X display. When we introduce disk files, I
+ * think what will happen is that the X resources will override
+ * PuTTY's inbuilt defaults, but that the disk files will then
+ * override those. This isn't optimal, but it's the best I can
+ * immediately work out.
+ */
+
+struct xrm_string {
+ char *key;
+ char *value;
+};
+
+static tree234 *xrmtree = NULL;
+
+int xrmcmp(void *av, void *bv)
+{
+ struct xrm_string *a = (struct xrm_string *)av;
+ struct xrm_string *b = (struct xrm_string *)bv;
+ return strcmp(a->key, b->key);
+}
+
+void provide_xrm_string(char *string)
+{
+ char *p, *q;
+ struct xrm_string *xrms, *ret;
+
+ p = q = strchr(string, ':');
+ if (!q) {
+ fprintf(stderr, "pterm: expected a colon in resource string"
+ " \"%s\"\n", string);
+ return;
+ }
+ q++;
+ while (p > string && p[-1] != '.' && p[-1] != '*')
+ p--;
+ xrms = smalloc(sizeof(struct xrm_string));
+ xrms->key = smalloc(q-p);
+ memcpy(xrms->key, p, q-p);
+ xrms->key[q-p-1] = '\0';
+ while (*q && isspace(*q))
+ q++;
+ xrms->value = dupstr(q);
+
+ if (!xrmtree)
+ xrmtree = newtree234(xrmcmp);
+
+ ret = add234(xrmtree, xrms);
+ if (ret) {
+ /* Override an existing string. */
+ del234(xrmtree, ret);
+ add234(xrmtree, xrms);
+ }
+}
+
+char *get_setting(char *key)
+{
+ struct xrm_string tmp, *ret;
+ tmp.key = key;
+ if (xrmtree) {
+ ret = find234(xrmtree, &tmp, NULL);
+ if (ret)
+ return ret->value;
+ }
+ return x_get_default(key);
+}
+
void *open_settings_r(char *sessionname)
{
- return NULL;
+ static int thing_to_return_an_arbitrary_non_null_pointer_to;
+ return &thing_to_return_an_arbitrary_non_null_pointer_to;
}
char *read_setting_s(void *handle, char *key, char *buffer, int buflen)
{
- return NULL;
+ char *val = get_setting(key);
+ if (!val)
+ return NULL;
+ else {
+ strncpy(buffer, val, buflen);
+ buffer[buflen-1] = '\0';
+ return buffer;
+ }
}
int read_setting_i(void *handle, char *key, int defvalue)
{
- return defvalue;
+ char *val = get_setting(key);
+ if (!val)
+ return defvalue;
+ else
+ return atoi(val);
}
void close_settings_r(void *handle)
{
}
+enum {
+ INDEX_DIR, INDEX_HOSTKEYS
+};
+
+static void make_filename(char *filename, int index)
+{
+ char *home;
+ int len;
+ home = getenv("HOME");
+ strncpy(filename, home, FILENAME_MAX);
+ len = strlen(filename);
+ strncpy(filename + len,
+ index == INDEX_DIR ? "/.putty" :
+ index == INDEX_HOSTKEYS ? "/.putty/sshhostkeys" :
+ "/.putty/ERROR", FILENAME_MAX - len);
+ filename[FILENAME_MAX-1] = '\0';
+}
+
+/*
+ * Read an entire line of text from a file. Return a buffer
+ * malloced to be as big as necessary (caller must free).
+ */
+static char *fgetline(FILE *fp)
+{
+ char *ret = smalloc(512);
+ int size = 512, len = 0;
+ while (fgets(ret + len, size - len, fp)) {
+ len += strlen(ret + len);
+ if (ret[len-1] == '\n')
+ break; /* got a newline, we're done */
+ size = len + 512;
+ ret = srealloc(ret, size);
+ }
+ if (len == 0) { /* first fgets returned NULL */
+ sfree(ret);
+ return NULL;
+ }
+ ret[len] = '\0';
+ return ret;
+}
+
+/*
+ * Lines in the host keys file are of the form
+ *
+ * type@port:hostname keydata
+ *
+ * e.g.
+ *
+ * rsa@22:foovax.example.org 0x23,0x293487364395345345....2343
+ */
int verify_host_key(char *hostname, int port, char *keytype, char *key)
{
- return 1; /* key does not exist in registry */
+ FILE *fp;
+ char filename[FILENAME_MAX];
+ char *line;
+ int ret;
+
+ make_filename(filename, INDEX_HOSTKEYS);
+ fp = fopen(filename, "r");
+ if (!fp)
+ return 1; /* key does not exist */
+
+ ret = 1;
+ while ( (line = fgetline(fp)) ) {
+ int i;
+ char *p = line;
+ char porttext[20];
+
+ line[strcspn(line, "\n")] = '\0'; /* strip trailing newline */
+
+ i = strlen(keytype);
+ if (strncmp(p, keytype, i))
+ goto done;
+ p += i;
+
+ if (*p != '@')
+ goto done;
+ p++;
+
+ sprintf(porttext, "%d", port);
+ i = strlen(porttext);
+ if (strncmp(p, porttext, i))
+ goto done;
+ p += i;
+
+ if (*p != ':')
+ goto done;
+ p++;
+
+ i = strlen(hostname);
+ if (strncmp(p, hostname, i))
+ goto done;
+ p += i;
+
+ if (*p != ' ')
+ goto done;
+ p++;
+
+ /*
+ * Found the key. Now just work out whether it's the right
+ * one or not.
+ */
+ if (!strcmp(p, key))
+ ret = 0; /* key matched OK */
+ else
+ ret = 2; /* key mismatch */
+
+ done:
+ sfree(line);
+ if (ret != 1)
+ break;
+ }
+
+ return ret;
}
void store_host_key(char *hostname, int port, char *keytype, char *key)
{
+ FILE *fp;
+ int fd;
+ char filename[FILENAME_MAX];
+
+ make_filename(filename, INDEX_HOSTKEYS);
+ fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
+ if (fd < 0) {
+ char dir[FILENAME_MAX];
+
+ make_filename(dir, INDEX_DIR);
+ mkdir(dir, 0700);
+ fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
+ }
+ if (fd < 0) {
+ perror(filename);
+ exit(1);
+ }
+ fp = fdopen(fd, "a");
+ fprintf(fp, "%s@%d:%s %s\n", keytype, port, hostname, key);
+ fclose(fp);
}
void read_random_seed(noise_consumer_t consumer)
projects / u / mdw / putty / blobdiff