11 #define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
12 #define AGENT_MAX_MSGLEN 8192
14 #define GET_32BIT(cp) \
15 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
16 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
17 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
18 ((unsigned long)(unsigned char)(cp)[3]))
20 int agent_exists(void)
23 hwnd = FindWindow("Pageant", "Pageant");
30 struct agent_query_data {
32 unsigned char *mapping;
36 void (*callback)(void *, void *, int);
40 DWORD WINAPI agent_query_thread(LPVOID param)
42 struct agent_query_data *data = (struct agent_query_data *)param;
46 id = SendMessage(data->hwnd, WM_COPYDATA, (WPARAM) NULL,
50 retlen = 4 + GET_32BIT(data->mapping);
51 ret = snewn(retlen, unsigned char);
53 memcpy(ret, data->mapping, retlen);
58 UnmapViewOfFile(data->mapping);
59 CloseHandle(data->handle);
62 agent_schedule_callback(data->callback, data->callback_ctx, ret, retlen);
67 int agent_query(void *in, int inlen, void **out, int *outlen,
68 void (*callback)(void *, void *, int), void *callback_ctx)
73 unsigned char *p, *ret;
80 hwnd = FindWindow("Pageant", "Pageant");
82 return 1; /* *out == NULL, so failure */
83 mapname = dupprintf("PageantRequest%08x", (unsigned)GetCurrentThreadId());
84 filemap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
85 0, AGENT_MAX_MSGLEN, mapname);
87 return 1; /* *out == NULL, so failure */
88 p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
90 cds.dwData = AGENT_COPYDATA_ID;
91 cds.cbData = 1 + strlen(mapname);
93 if (callback != NULL && !(flags & FLAG_SYNCAGENT)) {
95 * We need an asynchronous Pageant request. Since I know of
96 * no way to stop SendMessage from blocking the thread it's
97 * called in, I see no option but to start a fresh thread.
98 * When we're done we'll PostMessage the result back to our
99 * main window, so that the callback is done in the primary
100 * thread to avoid concurrency.
102 struct agent_query_data *data = snew(struct agent_query_data);
105 data->handle = filemap;
106 data->mapname = mapname;
107 data->callback = callback;
108 data->callback_ctx = callback_ctx;
109 data->cds = cds; /* structure copy */
111 if (CreateThread(NULL, 0, agent_query_thread, data, 0, &threadid))
117 * The user either passed a null callback (indicating that the
118 * query is required to be synchronous) or CreateThread failed.
119 * Either way, we need a synchronous request.
121 id = SendMessage(hwnd, WM_COPYDATA, (WPARAM) NULL, (LPARAM) & cds);
123 retlen = 4 + GET_32BIT(p);
124 ret = snewn(retlen, unsigned char);
126 memcpy(ret, p, retlen);
132 CloseHandle(filemap);