* Pageant client code.
*/
-#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
-#ifdef TESTMODE
-#define debug(x) (printf x)
-#else
-#define debug(x)
-#endif
+#include "putty.h"
-int agent_exists(void) {
+#define AGENT_COPYDATA_ID 0x804e50ba /* random goop */
+#define AGENT_MAX_MSGLEN 8192
+
+#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)
+{
HWND hwnd;
hwnd = FindWindow("Pageant", "Pageant");
if (!hwnd)
- return FALSE;
+ return FALSE;
else
- return TRUE;
+ return TRUE;
}
-void agent_query(void *in, int inlen, void **out, int *outlen) {
-#if 0
-#define MAILSLOTNAME "\\\\.\\mailslot\\pageant_listener"
- SECURITY_ATTRIBUTES sa;
- HANDLE my_mailslot, agent_mailslot;
- char name[64];
- char *p;
- DWORD msglen, byteswritten, bytesread, inid;
-
- *out = NULL;
- *outlen = 0;
-
- agent_mailslot = CreateFile(MAILSLOTNAME, GENERIC_WRITE,
- FILE_SHARE_READ, (LPSECURITY_ATTRIBUTES)NULL,
- OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
- (HANDLE)NULL);
- debug(("opened %s: %p\n", MAILSLOTNAME, agent_mailslot));
- if (agent_mailslot == INVALID_HANDLE_VALUE)
- return;
-
- inid = GetCurrentThreadId();
- inid--;
-
- sa.nLength = sizeof(sa);
- sa.lpSecurityDescriptor = NULL;
- sa.bInheritHandle = TRUE;
-
- do {
- sprintf(name, "\\\\.\\mailslot\\pclient_request_%08x", ++inid);
- /*
- * Five-minute timeout.
- */
- my_mailslot = CreateMailslot(name, 0, 0, &sa);
- debug(("mailslot %s: %p\n", name, my_mailslot));
- } while (my_mailslot == INVALID_HANDLE_VALUE);
- Sleep(3000);
+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;
- msglen = strlen(name) + 1 + inlen;
- p = malloc(msglen);
- if (!p) {
- CloseHandle(my_mailslot);
- CloseHandle(agent_mailslot);
- return;
+ 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);
- strcpy(p, name);
- memcpy(p+strlen(p)+1, in, inlen);
+ agent_schedule_callback(data->callback, data->callback_ctx, ret, retlen);
- debug(("ooh\n"));
- if (WriteFile(agent_mailslot, p, msglen, &byteswritten, NULL) == 0) {
- debug(("eek!\n"));
- free(p);
- CloseHandle(my_mailslot);
- CloseHandle(agent_mailslot);
- return;
- }
- debug(("aah\n"));
- free(p);
- CloseHandle(agent_mailslot);
+ return 0;
+}
- WaitForSingleObject(my_mailslot, 3000000);
- debug(("waited\n"));
- if (!GetMailslotInfo(my_mailslot, NULL, &msglen, NULL, NULL)) {
- CloseHandle(my_mailslot);
- return;
- }
- if (msglen == MAILSLOT_NO_MESSAGE) {
- debug(("no message\n"));
- CloseHandle(my_mailslot);
- return;
- }
- debug(("msglen=%d\n", msglen));
- p = malloc(msglen);
- if (!p) {
- CloseHandle(my_mailslot);
- return;
- }
- if (ReadFile(my_mailslot, p, msglen, &bytesread, NULL) == 0 &&
- bytesread == msglen) {
- *out = p;
- *outlen = msglen;
- }
- CloseHandle(my_mailslot);
-#endif
+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;
- void *p, *ret;
+ unsigned char *p, *ret;
int id, retlen;
COPYDATASTRUCT cds;
*outlen = 0;
hwnd = FindWindow("Pageant", "Pageant");
- debug(("hwnd is %p\n", hwnd));
if (!hwnd)
- return;
- cds.dwData = 0; /* FIXME */
- cds.cbData = inlen;
- cds.lpData = in;
- id = SendMessage(hwnd, WM_COPYDATA, (WPARAM)NULL, (LPARAM)&cds);
- debug(("return is %d\n", id));
- if (id > 0) {
- sprintf(mapname, "PageantReply%08x", id);
- filemap = OpenFileMapping(FILE_MAP_READ, FALSE, mapname);
- debug(("name is `%s', filemap is %p\n", mapname, filemap));
- debug(("error is %d\n", GetLastError()));
- if (filemap != NULL && filemap != INVALID_HANDLE_VALUE) {
- p = MapViewOfFile(filemap, FILE_MAP_READ, 0, 0, 0);
- debug(("p is %p\n", p));
- if (p) {
- retlen = *(int *)p;
- debug(("len is %d\n", retlen));
- ret = malloc(retlen);
- if (ret) {
- memcpy(ret, ((int *)p) + 1, retlen);
- *out = ret;
- *outlen = retlen;
- }
- UnmapViewOfFile(p);
- }
- CloseHandle(filemap);
- }
- /* FIXME: tell agent to close its handle too */
+ 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);
+ if (!filemap)
+ 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.lpData = mapname;
+ 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);
}
-}
-
-#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;
+ /*
+ * 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);
+ ret = snewn(retlen, unsigned char);
+ if (ret) {
+ memcpy(ret, p, retlen);
+ *out = ret;
+ *outlen = retlen;
+ }
+ }
+ UnmapViewOfFile(p);
+ CloseHandle(filemap);
+ return 1;
}
-
-#endif
projects / u / mdw / putty / blobdiff