* Pageant client code.
*/
-#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
+#include "putty.h"
+
#define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
#define AGENT_MAX_MSGLEN 8192
-#ifdef TESTMODE
-#define debug(x) (printf x)
-#else
-#define debug(x)
-#endif
-
#define GET_32BIT(cp) \
(((unsigned long)(unsigned char)(cp)[0] << 24) | \
((unsigned long)(unsigned char)(cp)[1] << 16) | \
((unsigned long)(unsigned char)(cp)[2] << 8) | \
((unsigned long)(unsigned char)(cp)[3]))
-int agent_exists(void) {
+int agent_exists(void)
+{
HWND hwnd;
hwnd = FindWindow("Pageant", "Pageant");
if (!hwnd)
- return FALSE;
+ return FALSE;
else
- return TRUE;
+ return TRUE;
+}
+
+struct agent_query_data {
+ COPYDATASTRUCT cds;
+ unsigned char *mapping;
+ HANDLE handle;
+ char *mapname;
+ HWND hwnd;
+ void (*callback)(void *, void *, int);
+ void *callback_ctx;
+};
+
+DWORD WINAPI agent_query_thread(LPVOID param)
+{
+ struct agent_query_data *data = (struct agent_query_data *)param;
+ unsigned char *ret;
+ int id, retlen;
+
+ id = SendMessage(data->hwnd, WM_COPYDATA, (WPARAM) NULL,
+ (LPARAM) &data->cds);
+ ret = NULL;
+ if (id > 0) {
+ retlen = 4 + GET_32BIT(data->mapping);
+ ret = snewn(retlen, unsigned char);
+ if (ret) {
+ memcpy(ret, data->mapping, retlen);
+ }
+ }
+ if (!ret)
+ retlen = 0;
+ UnmapViewOfFile(data->mapping);
+ CloseHandle(data->handle);
+ sfree(data->mapname);
+
+ agent_schedule_callback(data->callback, data->callback_ctx, ret, retlen);
+
+ return 0;
}
-void agent_query(void *in, int inlen, void **out, int *outlen) {
+int agent_query(void *in, int inlen, void **out, int *outlen,
+ void (*callback)(void *, void *, int), void *callback_ctx)
+{
HWND hwnd;
- char mapname[64];
+ char *mapname;
HANDLE filemap;
unsigned char *p, *ret;
int id, retlen;
*outlen = 0;
hwnd = FindWindow("Pageant", "Pageant");
- debug(("hwnd is %p\n", hwnd));
if (!hwnd)
- return;
- sprintf(mapname, "PageantRequest%08x", GetCurrentThreadId());
+ return 1; /* *out == NULL, so failure */
+ mapname = dupprintf("PageantRequest%08x", (unsigned)GetCurrentThreadId());
filemap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
- 0, AGENT_MAX_MSGLEN, mapname);
+ 0, AGENT_MAX_MSGLEN, mapname);
if (!filemap)
- return;
+ return 1; /* *out == NULL, so failure */
p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
memcpy(p, in, inlen);
cds.dwData = AGENT_COPYDATA_ID;
- cds.cbData = 1+strlen(mapname);
+ cds.cbData = 1 + strlen(mapname);
cds.lpData = mapname;
- id = SendMessage(hwnd, WM_COPYDATA, (WPARAM)NULL, (LPARAM)&cds);
- debug(("return is %d\n", id));
+ if (callback != NULL && !(flags & FLAG_SYNCAGENT)) {
+ /*
+ * We need an asynchronous Pageant request. Since I know of
+ * no way to stop SendMessage from blocking the thread it's
+ * called in, I see no option but to start a fresh thread.
+ * When we're done we'll PostMessage the result back to our
+ * main window, so that the callback is done in the primary
+ * thread to avoid concurrency.
+ */
+ struct agent_query_data *data = snew(struct agent_query_data);
+ DWORD threadid;
+ data->mapping = p;
+ data->handle = filemap;
+ data->mapname = mapname;
+ data->callback = callback;
+ data->callback_ctx = callback_ctx;
+ data->cds = cds; /* structure copy */
+ data->hwnd = hwnd;
+ if (CreateThread(NULL, 0, agent_query_thread, data, 0, &threadid))
+ return 0;
+ sfree(data);
+ }
+
+ /*
+ * The user either passed a null callback (indicating that the
+ * query is required to be synchronous) or CreateThread failed.
+ * Either way, we need a synchronous request.
+ */
+ id = SendMessage(hwnd, WM_COPYDATA, (WPARAM) NULL, (LPARAM) & cds);
if (id > 0) {
- retlen = 4 + GET_32BIT(p);
- debug(("len is %d\n", retlen));
- ret = malloc(retlen);
- if (ret) {
- memcpy(ret, p, retlen);
- *out = ret;
- *outlen = retlen;
- }
+ retlen = 4 + GET_32BIT(p);
+ ret = snewn(retlen, unsigned char);
+ if (ret) {
+ memcpy(ret, p, retlen);
+ *out = ret;
+ *outlen = retlen;
+ }
}
UnmapViewOfFile(p);
CloseHandle(filemap);
+ return 1;
}
-
-#ifdef TESTMODE
-
-int main(void) {
- void *msg;
- int len;
- int i;
-
- agent_query("\0\0\0\1\1", 5, &msg, &len);
- debug(("%d:", len));
- for (i = 0; i < len; i++)
- debug((" %02x", ((unsigned char *)msg)[i]));
- debug(("\n"));
- return 0;
-}
-
-#endif