10 #define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
11 #define AGENT_MAX_MSGLEN 8192
13 #define GET_32BIT(cp) \
14 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
15 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
16 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
17 ((unsigned long)(unsigned char)(cp)[3]))
19 int agent_exists(void)
22 hwnd = FindWindow("Pageant", "Pageant");
30 * Unfortunately, this asynchronous agent request mechanism doesn't
31 * appear to work terribly well. I'm going to comment it out for
32 * the moment, and see if I can come up with a better one :-/
34 #ifdef WINDOWS_ASYNC_AGENT
36 struct agent_query_data {
38 unsigned char *mapping;
42 void (*callback)(void *, void *, int);
46 DWORD WINAPI agent_query_thread(LPVOID param)
48 struct agent_query_data *data = (struct agent_query_data *)param;
52 id = SendMessage(data->hwnd, WM_COPYDATA, (WPARAM) NULL,
56 retlen = 4 + GET_32BIT(data->mapping);
57 ret = snewn(retlen, unsigned char);
59 memcpy(ret, data->mapping, retlen);
64 UnmapViewOfFile(data->mapping);
65 CloseHandle(data->handle);
68 agent_schedule_callback(data->callback, data->callback_ctx, ret, retlen);
75 int agent_query(void *in, int inlen, void **out, int *outlen,
76 void (*callback)(void *, void *, int), void *callback_ctx)
81 unsigned char *p, *ret;
88 hwnd = FindWindow("Pageant", "Pageant");
90 return 1; /* *out == NULL, so failure */
91 mapname = dupprintf("PageantRequest%08x", (unsigned)GetCurrentThreadId());
92 filemap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
93 0, AGENT_MAX_MSGLEN, mapname);
95 return 1; /* *out == NULL, so failure */
96 p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
98 cds.dwData = AGENT_COPYDATA_ID;
99 cds.cbData = 1 + strlen(mapname);
100 cds.lpData = mapname;
101 #ifdef WINDOWS_ASYNC_AGENT
102 if (callback != NULL && !(flags & FLAG_SYNCAGENT)) {
104 * We need an asynchronous Pageant request. Since I know of
105 * no way to stop SendMessage from blocking the thread it's
106 * called in, I see no option but to start a fresh thread.
107 * When we're done we'll PostMessage the result back to our
108 * main window, so that the callback is done in the primary
109 * thread to avoid concurrency.
111 struct agent_query_data *data = snew(struct agent_query_data);
114 data->handle = filemap;
115 data->mapname = mapname;
116 data->callback = callback;
117 data->callback_ctx = callback_ctx;
118 data->cds = cds; /* structure copy */
120 if (CreateThread(NULL, 0, agent_query_thread, data, 0, &threadid))
127 * The user either passed a null callback (indicating that the
128 * query is required to be synchronous) or CreateThread failed.
129 * Either way, we need a synchronous request.
131 id = SendMessage(hwnd, WM_COPYDATA, (WPARAM) NULL, (LPARAM) & cds);
133 retlen = 4 + GET_32BIT(p);
134 ret = snewn(retlen, unsigned char);
136 memcpy(ret, p, retlen);
142 CloseHandle(filemap);