2 * Pageant client code.
\r
10 #define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
\r
11 #define AGENT_MAX_MSGLEN 8192
\r
13 int agent_exists(void)
\r
16 hwnd = FindWindow("Pageant", "Pageant");
\r
24 * Unfortunately, this asynchronous agent request mechanism doesn't
\r
25 * appear to work terribly well. I'm going to comment it out for
\r
26 * the moment, and see if I can come up with a better one :-/
\r
28 #ifdef WINDOWS_ASYNC_AGENT
\r
30 struct agent_query_data {
\r
32 unsigned char *mapping;
\r
36 void (*callback)(void *, void *, int);
\r
40 DWORD WINAPI agent_query_thread(LPVOID param)
\r
42 struct agent_query_data *data = (struct agent_query_data *)param;
\r
46 id = SendMessage(data->hwnd, WM_COPYDATA, (WPARAM) NULL,
\r
47 (LPARAM) &data->cds);
\r
50 retlen = 4 + GET_32BIT(data->mapping);
\r
51 ret = snewn(retlen, unsigned char);
\r
53 memcpy(ret, data->mapping, retlen);
\r
58 UnmapViewOfFile(data->mapping);
\r
59 CloseHandle(data->handle);
\r
60 sfree(data->mapname);
\r
62 agent_schedule_callback(data->callback, data->callback_ctx, ret, retlen);
\r
69 int agent_query(void *in, int inlen, void **out, int *outlen,
\r
70 void (*callback)(void *, void *, int), void *callback_ctx)
\r
75 unsigned char *p, *ret;
\r
82 hwnd = FindWindow("Pageant", "Pageant");
\r
84 return 1; /* *out == NULL, so failure */
\r
85 mapname = dupprintf("PageantRequest%08x", (unsigned)GetCurrentThreadId());
\r
86 filemap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
\r
87 0, AGENT_MAX_MSGLEN, mapname);
\r
88 if (filemap == NULL || filemap == INVALID_HANDLE_VALUE)
\r
89 return 1; /* *out == NULL, so failure */
\r
90 p = MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0, 0);
\r
91 memcpy(p, in, inlen);
\r
92 cds.dwData = AGENT_COPYDATA_ID;
\r
93 cds.cbData = 1 + strlen(mapname);
\r
94 cds.lpData = mapname;
\r
95 #ifdef WINDOWS_ASYNC_AGENT
\r
96 if (callback != NULL && !(flags & FLAG_SYNCAGENT)) {
\r
98 * We need an asynchronous Pageant request. Since I know of
\r
99 * no way to stop SendMessage from blocking the thread it's
\r
100 * called in, I see no option but to start a fresh thread.
\r
101 * When we're done we'll PostMessage the result back to our
\r
102 * main window, so that the callback is done in the primary
\r
103 * thread to avoid concurrency.
\r
105 struct agent_query_data *data = snew(struct agent_query_data);
\r
108 data->handle = filemap;
\r
109 data->mapname = mapname;
\r
110 data->callback = callback;
\r
111 data->callback_ctx = callback_ctx;
\r
112 data->cds = cds; /* structure copy */
\r
114 if (CreateThread(NULL, 0, agent_query_thread, data, 0, &threadid))
\r
121 * The user either passed a null callback (indicating that the
\r
122 * query is required to be synchronous) or CreateThread failed.
\r
123 * Either way, we need a synchronous request.
\r
125 id = SendMessage(hwnd, WM_COPYDATA, (WPARAM) NULL, (LPARAM) &cds);
\r
127 retlen = 4 + GET_32BIT(p);
\r
128 ret = snewn(retlen, unsigned char);
\r
130 memcpy(ret, p, retlen);
\r
135 UnmapViewOfFile(p);
\r
136 CloseHandle(filemap);
\r