http NTLM: change return type of Curl_input_ntlm() to CURLcode

Remove CURLntlm enum, no longer required.

lib/http.c

@@ -767,9 +767,9 @@ CURLcode Curl_http_input_auth(struct connectdata *conn,
       if(authp->picked == CURLAUTH_NTLM ||
          authp->picked == CURLAUTH_NTLM_SSO) {
         /* NTLM authentication is picked and activated */
-        CURLntlm ntlm =
+        CURLcode ntlm =
           Curl_input_ntlm(conn, (bool)(httpcode == 407), start);
-        if(CURLNTLM_BAD != ntlm) {
+        if(CURLE_OK == ntlm) {
           data->state.authproblem = FALSE;
 #ifdef WINBIND_NTLM_AUTH_ENABLED
           if(authp->picked == CURLAUTH_NTLM_SSO) {

lib/http_ntlm.c

@@ -265,7 +265,7 @@ static unsigned int readint_le(unsigned char *buf)
        from the beginning of the NTLM message.
 */
 
-CURLntlm Curl_input_ntlm(struct connectdata *conn,
+CURLcode Curl_input_ntlm(struct connectdata *conn,
                          bool proxy,         /* if proxy or not */
                          const char *header) /* rest of the www-authenticate:
                                                 header */
@@ -275,10 +275,12 @@ CURLntlm Curl_input_ntlm(struct connectdata *conn,
 #ifndef USE_WINDOWS_SSPI
   static const char type2_marker[] = { 0x02, 0x00, 0x00, 0x00 };
 #endif
+  CURLcode result = CURLE_OK;
 
 #ifdef USE_NSS
-  if(CURLE_OK != Curl_nss_force_init(conn->data))
-    return CURLNTLM_BAD;
+  result = Curl_nss_force_init(conn->data);
+  if(result)
+    return result;
 #endif
 
   ntlm = proxy ? &conn->proxyntlm : &conn->ntlm;
@@ -314,7 +316,7 @@ CURLntlm Curl_input_ntlm(struct connectdata *conn,
       unsigned char *buffer;
       size = Curl_base64_decode(header, &buffer);
       if(!buffer)
-        return CURLNTLM_BAD;
+        return CURLE_OUT_OF_MEMORY;
 
       ntlm->state = NTLMSTATE_TYPE2; /* we got a type-2 */
 
@@ -334,7 +336,8 @@ CURLntlm Curl_input_ntlm(struct connectdata *conn,
          (memcmp(buffer + 8, type2_marker, sizeof(type2_marker)) != 0)) {
         /* This was not a good enough type-2 message */
         free(buffer);
-        return CURLNTLM_BAD;
+        infof(conn->data, "NTLM handshake failure (bad type-2 message)\n");
+        return CURLE_REMOTE_ACCESS_DENIED;
       }
 
       ntlm->flags = readint_le(&buffer[20]);
@@ -352,14 +355,16 @@ CURLntlm Curl_input_ntlm(struct connectdata *conn,
       free(buffer);
     }
     else {
-      if(ntlm->state >= NTLMSTATE_TYPE1)
-        return CURLNTLM_BAD;
+      if(ntlm->state >= NTLMSTATE_TYPE1) {
+        infof(conn->data, "NTLM handshake failure (internal error)\n");
+        return CURLE_REMOTE_ACCESS_DENIED;
+      }
 
       ntlm->state = NTLMSTATE_TYPE1; /* we should sent away a type-1 */
     }
   }
 
-  return CURLNTLM_FINE;
+  return result;
 }
 
 #ifndef USE_WINDOWS_SSPI

lib/http_ntlm.h

@@ -22,17 +22,8 @@
  *
  ***************************************************************************/
 
-typedef enum {
-  CURLNTLM_NONE, /* not a ntlm */
-  CURLNTLM_BAD,  /* an ntlm, but one we don't like */
-  CURLNTLM_FIRST, /* the first 401-reply we got with NTLM */
-  CURLNTLM_FINE, /* an ntlm we act on */
-
-  CURLNTLM_LAST  /* last entry in this enum, don't use */
-} CURLntlm;
-
 /* this is for ntlm header input */
-CURLntlm Curl_input_ntlm(struct connectdata *conn, bool proxy,
+CURLcode Curl_input_ntlm(struct connectdata *conn, bool proxy,
                          const char *header);
 
 /* this is for creating ntlm header output */