X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/5c58ad2d1527936b4d30891497eef48bde0fe1f3..2d466ffd08675d26db45e524c2fe6a8cf4628e2b:/pageantc.c

diff --git a/pageantc.c b/pageantc.c
index e718313e..384abe28 100644
--- a/pageantc.c
+++ b/pageantc.c
@@ -6,109 +6,39 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+#include "puttymem.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
 
-int agent_exists(void) {
+#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);
-
-    msglen = strlen(name) + 1 + inlen;
-    p = malloc(msglen);
-    if (!p) {
-        CloseHandle(my_mailslot);
-        CloseHandle(agent_mailslot);
-        return;
-    }
-
-    strcpy(p, name);
-    memcpy(p+strlen(p)+1, in, inlen);
-
-    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);
-
-    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
+void agent_query(void *in, int inlen, void **out, int *outlen)
+{
     HWND hwnd;
     char mapname[64];
     HANDLE filemap;
-    void *p, *ret;
+    unsigned char *p, *ret;
     int id, retlen;
     COPYDATASTRUCT cds;
 
@@ -118,40 +48,37 @@ void agent_query(void *in, int inlen, void **out, int *outlen) {
     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);
+	return;
+    sprintf(mapname, "PageantRequest%08x", (unsigned)GetCurrentThreadId());
+    filemap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE,
+				0, AGENT_MAX_MSGLEN, mapname);
+    if (!filemap)
+	return;
+    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;
+    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 */
+	retlen = 4 + GET_32BIT(p);
+	debug(("len is %d\n", retlen));
+	ret = smalloc(retlen);
+	if (ret) {
+	    memcpy(ret, p, retlen);
+	    *out = ret;
+	    *outlen = retlen;
+	}
     }
+    UnmapViewOfFile(p);
+    CloseHandle(filemap);
 }
 
 #ifdef TESTMODE
 
-int main(void) {
+int main(void)
+{
     void *msg;
     int len;
     int i;
@@ -159,7 +86,7 @@ int main(void) {
     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((" %02x", ((unsigned char *) msg)[i]));
     debug(("\n"));
     return 0;
 }