A dispatcher for running ntlm_auth.

dlls/secur32/Makefile.in

@@ -8,6 +8,7 @@ IMPORTS   = user32 advapi32 kernel32 ntdll
 
 C_SRCS = \
 	base64_codec.c \
+	dispatcher.c \
 	negotiate.c \
 	ntlm.c \
 	schannel.c \

dlls/secur32/dispatcher.c

+/*
+ * Copyright 2005 Kai Blin
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * A dispatcher to run ntlm_auth for wine's sspi module.
+ */
+
+#include "config.h"
+#include <stdarg.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <sys/types.h>
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif 
+#include <stdlib.h>
+#include <fcntl.h>
+#include "windef.h"
+#include "winbase.h"
+#include "winerror.h"
+#include "sspi.h"
+#include "secur32_priv.h"
+#include "wine/debug.h"
+
+#define INITIAL_BUFFER_SIZE 200
+
+WINE_DEFAULT_DEBUG_CHANNEL(secur32);
+
+SECURITY_STATUS fork_helper(PNegoHelper *new_helper, const char *prog,
+        char* const argv[])
+{
+    int pipe_in[2];
+    int pipe_out[2];
+    int i;
+    PNegoHelper helper;
+
+    TRACE("%s ", debugstr_a(prog));
+    for(i = 0; argv[i] != NULL; ++i)
+    {
+        TRACE("%s ", debugstr_a(argv[i]));
+    }
+    TRACE("\n");
+
+    if( pipe(pipe_in) < 0 )
+    {
+        return SEC_E_INTERNAL_ERROR;
+    }
+    if( pipe(pipe_out) < 0 )
+    {
+        close(pipe_in[0]);
+        close(pipe_in[1]);
+        return SEC_E_INTERNAL_ERROR;
+    }
+    if (!(helper = HeapAlloc(GetProcessHeap(),0, sizeof(NegoHelper))))
+    {
+        close(pipe_in[0]);
+        close(pipe_in[1]);
+        close(pipe_out[0]);
+        close(pipe_out[1]);
+        return SEC_E_INSUFFICIENT_MEMORY;
+    }
+
+    helper->helper_pid = fork();
+
+    if(helper->helper_pid == -1)
+    {
+        close(pipe_in[0]);
+        close(pipe_in[1]);
+        close(pipe_out[0]);
+        close(pipe_out[1]);
+        HeapFree( GetProcessHeap(), 0, helper );
+        return SEC_E_INTERNAL_ERROR;
+    }
+
+    if(helper->helper_pid == 0)
+    {
+        /* We're in the child now */
+        close(0);
+        close(1);
+
+        dup2(pipe_out[0], 0);
+        close(pipe_out[0]);
+        close(pipe_out[1]);
+
+        dup2(pipe_in[1], 1);
+        close(pipe_in[0]);
+        close(pipe_in[1]);
+
+        execvp(prog, argv);
+
+        /* Whoops, we shouldn't get here. Big badaboom.*/
+        write(STDOUT_FILENO, "BH\n", 3);
+        exit(1);
+    }
+    else
+    {
+        *new_helper = helper;
+        helper->version = -1;
+        helper->password = NULL;
+        helper->com_buf = NULL;
+        helper->com_buf_size = 0;
+        helper->com_buf_offset = 0;
+        helper->pipe_in = pipe_in[0];
+        close(pipe_in[1]);
+        helper->pipe_out = pipe_out[1];
+        close(pipe_out[0]);
+    }
+
+    return SEC_E_OK;
+}
+
+static SECURITY_STATUS read_line(PNegoHelper helper, int *offset_len)
+{
+    char *newline;
+    int read_size;
+    
+    if(helper->com_buf == NULL)
+    {
+        TRACE("Creating a new buffer for the helper\n");
+        if((helper->com_buf = HeapAlloc(GetProcessHeap(), 0, INITIAL_BUFFER_SIZE)) == NULL)
+            return SEC_E_INSUFFICIENT_MEMORY;
+        
+        /* Created a new buffer, size is INITIAL_BUFFER_SIZE, offset is 0 */
+        helper->com_buf_size = INITIAL_BUFFER_SIZE;
+        helper->com_buf_offset = 0;
+    }
+
+    do
+    {
+        TRACE("offset = %d, size = %d\n", helper->com_buf_offset, helper->com_buf_size);
+        if(helper->com_buf_offset + INITIAL_BUFFER_SIZE > helper->com_buf_size)
+        {
+            /* increment buffer size in INITIAL_BUFFER_SIZE steps */
+            char *buf = HeapReAlloc(GetProcessHeap(), 0, helper->com_buf,
+                                    helper->com_buf_size + INITIAL_BUFFER_SIZE);
+            TRACE("Resizing buffer!\n");
+            if (!buf) return SEC_E_INSUFFICIENT_MEMORY;
+            helper->com_buf_size += INITIAL_BUFFER_SIZE;
+            helper->com_buf = buf;
+        }
+        if((read_size = read(helper->pipe_in, helper->com_buf + helper->com_buf_offset,
+                    helper->com_buf_size - helper->com_buf_offset)) <= 0)
+        {
+            return SEC_E_INTERNAL_ERROR;
+        }
+        
+        TRACE("read_size = %d, read: %s\n", read_size, 
+                debugstr_a(helper->com_buf + helper->com_buf_offset));
+        helper->com_buf_offset += read_size;
+        newline = memchr(helper->com_buf, '\n', helper->com_buf_offset);
+    }while(newline == NULL);
+
+    /* Now, if there's a newline character, and we read more than that newline,
+     * we have to store the offset so we can preserve the additional data.*/
+    if( newline != helper->com_buf + helper->com_buf_offset)
+    {
+        TRACE("offset_len is calculated from %p - %p\n", 
+                (helper->com_buf + helper->com_buf_offset), newline+1);
+        /* the length of the offset is the number of chars after the newline */
+        *offset_len = (helper->com_buf + helper->com_buf_offset) - (newline + 1);
+    }
+    else
+    {
+        *offset_len = 0;
+    }
+    
+    *newline = '\0';
+
+    return SEC_E_OK;
+}
+
+static SECURITY_STATUS preserve_unused(PNegoHelper helper, int offset_len)
+{
+    TRACE("offset_len = %d\n", offset_len);
+
+    if(offset_len > 0)
+    {
+        memmove(helper->com_buf, helper->com_buf + helper->com_buf_offset, 
+                offset_len);
+        helper->com_buf_offset = offset_len;
+    }
+    else
+    {
+        helper->com_buf_offset = 0;
+    }
+
+    TRACE("helper->com_buf_offset was set to: %d\n", helper->com_buf_offset);
+    return SEC_E_OK;
+}
+
+SECURITY_STATUS run_helper(PNegoHelper helper, char *buffer,
+        unsigned int max_buflen, int *buflen)
+{
+    int offset_len;
+    SECURITY_STATUS sec_status = SEC_E_OK;
+
+    TRACE("In helper: sending %s\n", debugstr_a(buffer));
+
+    /* buffer + '\n' */
+    write(helper->pipe_out, buffer, lstrlenA(buffer));
+    write(helper->pipe_out, "\n", 1);
+
+    if((sec_status = read_line(helper, &offset_len)) != SEC_E_OK)
+    {
+        return sec_status;
+    }
+    
+    TRACE("In helper: recieved %s\n", debugstr_a(helper->com_buf));
+    *buflen = lstrlenA(helper->com_buf);
+
+    if( *buflen > max_buflen)
+    {   
+        ERR("Buffer size too small(%d given, %d required) dropping data!\n",
+                max_buflen, *buflen);
+        return SEC_E_BUFFER_TOO_SMALL;
+    }
+
+    if( *buflen < 2 )
+    {
+        return SEC_E_ILLEGAL_MESSAGE;
+    }
+
+    if( (*buflen <= 3) && (strncmp(helper->com_buf, "BH", 2) == 0))
+    {
+        return SEC_E_INTERNAL_ERROR;
+    }
+
+    /* We only get ERR if the input size is too big. On a GENSEC error,
+     * ntlm_auth will return BH */
+    if(strncmp(helper->com_buf, "ERR", 3) == 0)
+    {
+        return SEC_E_INVALID_TOKEN;
+    }
+
+    memcpy(buffer, helper->com_buf, *buflen+1);
+
+    sec_status = preserve_unused(helper, offset_len);
+    
+    return sec_status;
+}
+
+void cleanup_helper(PNegoHelper helper)
+{
+
+    TRACE("Killing helper %p\n", helper);
+    if( (helper == NULL) || (helper->helper_pid == 0))
+        return;
+      
+    HeapFree(GetProcessHeap(), 0, helper->password);
+    HeapFree(GetProcessHeap(), 0, helper->com_buf);
+
+    /* closing stdin will terminate ntlm_auth */
+    close(helper->pipe_out);
+    close(helper->pipe_in);
+
+    waitpid(helper->helper_pid, NULL, 0);
+
+    helper->helper_pid = 0;
+    HeapFree(GetProcessHeap(), 0, helper);
+}
+
+void check_version(PNegoHelper helper)
+{
+    char temp[80];
+    char *newline;
+
+    TRACE("Checking version of helper\n");
+    if(helper != NULL)
+    {
+        int len = read(helper->pipe_in, temp, sizeof(temp)-1);
+        if (len > 8)
+        {
+            if((newline = memchr(temp, '\n', len)) != NULL)
+                *newline = '\0';
+            else
+                temp[len] = 0;
+
+            TRACE("Exact version is %s\n", debugstr_a(temp));
+            if(strncmp(temp+8, "3.9", 3) == 0)
+            {
+                helper->version = 4;
+            }
+            else if(strncmp(temp+8, "3.0", 3) == 0)
+            {
+                helper->version = 3;
+            }
+            else
+            {
+                TRACE("Unknown version!\n");
+                helper->version = -1;
+            }
+        }
+    }
+}

dlls/secur32/secur32_priv.h

@@ -21,6 +21,7 @@
 #ifndef __SECUR32_PRIV_H__
 #define __SECUR32_PRIV_H__
 
+#include <sys/types.h>
 #include "wine/list.h"
 
 /* Memory allocation functions for memory accessible by callers of secur32.
@@ -51,6 +52,27 @@ typedef struct _SecurePackage
     SecureProvider *provider;
 } SecurePackage;
 
+typedef enum _helper_mode {
+    NTLM_SERVER,
+    NTLM_CLIENT,
+    NEGO_SERVER,
+    NEGO_CLIENT,
+    NUM_HELPER_MODES
+} HelperMode;
+
+typedef struct _NegoHelper {
+    pid_t helper_pid;
+    HelperMode mode;
+    SEC_CHAR *password;
+    int pwlen;
+    int pipe_in;
+    int pipe_out;
+    int version;
+    char *com_buf;
+    int com_buf_size;
+    int com_buf_offset;
+} NegoHelper, *PNegoHelper;
+
 /* Allocates space for and initializes a new provider.  If fnTableA or fnTableW
  * is non-NULL, assumes the provider is built-in (and is thus already loaded.)
  * Otherwise moduleName must not be NULL.
@@ -86,6 +108,17 @@ void SECUR32_initSchannelSP(void);
 void SECUR32_initNegotiateSP(void);
 void SECUR32_initNTLMSP(void);
 
+/* Functions from dispatcher.c used elsewhere in the code */
+SECURITY_STATUS fork_helper(PNegoHelper *new_helper, const char *prog,
+        char * const argv[]);
+
+SECURITY_STATUS run_helper(PNegoHelper helper, char *buffer,
+        unsigned int max_buflen, int *buflen);
+
+void cleanup_helper(PNegoHelper helper);
+
+void check_version(PNegoHelper helper);
+
 /* Functions from base64_codec.c used elsewhere */
 SECURITY_STATUS encodeBase64(PBYTE in_buf, int in_len, char* out_buf, 
         int max_len, int *out_len);