http_negotiate: Return CURLcode in Curl_input_negotiate() instead of int

lib/http.c

@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -834,14 +834,13 @@ CURLcode Curl_http_input_auth(struct connectdata *conn, bool proxy,
   while(*auth) {
 #ifdef USE_SPNEGO
     if(checkprefix("Negotiate", auth)) {
-      int neg;
       *availp |= CURLAUTH_NEGOTIATE;
       authp->avail |= CURLAUTH_NEGOTIATE;
 
       if(authp->picked == CURLAUTH_NEGOTIATE) {
         if(negdata->state == GSS_AUTHSENT || negdata->state == GSS_AUTHNONE) {
-          neg = Curl_input_negotiate(conn, proxy, auth);
-          if(neg == 0) {
+          CURLcode result = Curl_input_negotiate(conn, proxy, auth);
+          if(!result) {
             DEBUGASSERT(!data->req.newurl);
             data->req.newurl = strdup(data->change.url);
             if(!data->req.newurl)

lib/http_negotiate.c

@@ -64,10 +64,8 @@ get_gss_name(struct connectdata *conn, bool proxy, gss_name_t *server)
   return GSS_ERROR(major_status) ? -1 : 0;
 }
 
-/* returning zero (0) means success, everything else is treated as "failure"
-   with no care exactly what the failure was */
-int Curl_input_negotiate(struct connectdata *conn, bool proxy,
-                         const char *header)
+CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
+                              const char *header)
 {
   struct SessionHandle *data = conn->data;
   struct negotiatedata *neg_ctx = proxy?&data->state.proxyneg:
@@ -85,12 +83,12 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
      * rejected it (since we're again here). Exit with an error since we
      * can't invent anything better */
     Curl_cleanup_negotiate(data);
-    return -1;
+    return CURLE_LOGIN_DENIED;
   }
 
   if(neg_ctx->server_name == NULL &&
-      (ret = get_gss_name(conn, proxy, &neg_ctx->server_name)))
-    return ret;
+      get_gss_name(conn, proxy, &neg_ctx->server_name))
+      return CURLE_OUT_OF_MEMORY;
 
   header += strlen("Negotiate");
   while(*header && ISSPACE(*header))
@@ -100,8 +98,12 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
   if(len > 0) {
     result = Curl_base64_decode(header, (unsigned char **)&input_token.value,
                                 &rawlen);
-    if(result || rawlen == 0)
-      return -1;
+    if(result)
+      return result;
+
+    if(!rawlen)
+      return CURLE_BAD_CONTENT_ENCODING;
+
     input_token.length = rawlen;
 
     DEBUGASSERT(input_token.value != NULL);
@@ -125,19 +127,19 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
       gss_release_buffer(&discard_st, &output_token);
     Curl_gss_log_error(conn->data, minor_status,
                        "gss_init_sec_context() failed: ");
-    return -1;
+    return CURLE_OUT_OF_MEMORY;
   }
 
   if(!output_token.value || !output_token.length) {
     if(output_token.value)
       gss_release_buffer(&discard_st, &output_token);
-    return -1;
+    return CURLE_OUT_OF_MEMORY;
   }
 
   neg_ctx->output_token = output_token;
-  return 0;
-}
 
+  return CURLE_OK;
+}
 
 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
 {

lib/http_negotiate.h

@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -25,8 +25,8 @@
 #ifdef USE_SPNEGO
 
 /* this is for Negotiate header input */
-int Curl_input_negotiate(struct connectdata *conn, bool proxy,
-                         const char *header);
+CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
+                              const char *header);
 
 /* this is for creating Negotiate header output */
 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy);

lib/http_negotiate_sspi.c

@@ -42,10 +42,8 @@
 /* The last #include file should be: */
 #include "memdebug.h"
 
-/* returning zero (0) means success, everything else is treated as "failure"
-   with no care exactly what the failure was */
-int Curl_input_negotiate(struct connectdata *conn, bool proxy,
-                         const char *header)
+CURLcode Curl_input_negotiate(struct connectdata *conn, bool proxy,
+                              const char *header)
 {
   BYTE              *input_token = NULL;
   SecBufferDesc     out_buff_desc;
@@ -88,20 +86,20 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
      * rejected it (since we're again here). Exit with an error since we
      * can't invent anything better */
     Curl_cleanup_negotiate(conn->data);
-    return -1;
+    return CURLE_LOGIN_DENIED;
   }
 
   if(!neg_ctx->server_name) {
     /* Check proxy auth requested but no given proxy name */
     if(proxy && !conn->proxy.name)
-      return -1;
+      return CURLE_BAD_FUNCTION_ARGUMENT;
 
     /* Generate our SPN */
     neg_ctx->server_name = Curl_sasl_build_spn("HTTP",
                                                 proxy ? conn->proxy.name :
                                                         conn->host.name);
     if(!neg_ctx->server_name)
-      return -1;
+      return CURLE_OUT_OF_MEMORY;
   }
 
   if(!neg_ctx->output_token) {
@@ -110,7 +108,7 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
                                                 TEXT(SP_NAME_NEGOTIATE),
                                                 &SecurityPackage);
     if(status != SEC_E_OK)
-      return -1;
+      return CURLE_NOT_BUILT_IN;
 
     /* Allocate input and output buffers according to the max token size
        as indicated by the security package */
@@ -130,7 +128,7 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
     if(neg_ctx->context) {
       /* The server rejected our authentication and hasn't suppled any more
          negotiation mechanisms */
-      return -1;
+      return CURLE_LOGIN_DENIED;
     }
 
     /* We have to acquire credentials and allocate memory for the context */
@@ -138,13 +136,13 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
     neg_ctx->context = malloc(sizeof(CtxtHandle));
 
     if(!neg_ctx->credentials || !neg_ctx->context)
-      return -1;
+      return CURLE_OUT_OF_MEMORY;
 
     if(userp && *userp) {
       /* Populate our identity structure */
       result = Curl_create_sspi_identity(userp, passwdp, &neg_ctx->identity);
       if(result)
-        return -1;
+        return result;
 
       /* Allow proper cleanup of the identity structure */
       neg_ctx->p_identity = &neg_ctx->identity;
@@ -161,14 +159,17 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
                                          neg_ctx->p_identity, NULL, NULL,
                                          neg_ctx->credentials, &expiry);
     if(neg_ctx->status != SEC_E_OK)
-      return -1;
+      return CURLE_LOGIN_DENIED;
   }
   else {
     result = Curl_base64_decode(header,
                                 (unsigned char **)&input_token,
                                 &input_token_len);
-    if(result || !input_token_len)
-      return -1;
+    if(result)
+      return result;
+
+    if(!input_token_len)
+      return CURLE_BAD_CONTENT_ENCODING;
   }
 
   /* Setup the "output" security buffer */
@@ -207,22 +208,21 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
   Curl_safefree(input_token);
 
   if(GSS_ERROR(neg_ctx->status))
-    return -1;
+    return CURLE_OUT_OF_MEMORY;
 
   if(neg_ctx->status == SEC_I_COMPLETE_NEEDED ||
      neg_ctx->status == SEC_I_COMPLETE_AND_CONTINUE) {
     neg_ctx->status = s_pSecFn->CompleteAuthToken(neg_ctx->context,
                                                   &out_buff_desc);
     if(GSS_ERROR(neg_ctx->status))
-      return -1;
+      return CURLE_RECV_ERROR;
   }
 
   neg_ctx->output_token_length = out_sec_buff.cbBuffer;
 
-  return 0;
+  return CURLE_OK;
 }
 
-
 CURLcode Curl_output_negotiate(struct connectdata *conn, bool proxy)
 {
   struct negotiatedata *neg_ctx = proxy?&conn->data->state.proxyneg: