[PATCH v2 1/2] NetworkPkg: Add PCD to enable the HTTP connections switch

[Jiaxin Wu <jiaxin.wu@intel.com>]

v2:
* Rename the PCD to PcdAllowHttpConnections.
* Refine the PCD descriptions.

If the value of PcdAllowHttpConnections is TRUE, HTTP connections is
allowed. Both the "https://" and "http://" URI schemes are permitted.
Otherwise, HTTP connections is denied. Only the "https://" URI scheme
is permitted.

Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Kinney Michael D <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Wu Jiaxin <jiaxin.wu@intel.com>
---
 NetworkPkg/HttpBootDxe/HttpBootClient.c  | 20 +++++++-
 NetworkPkg/HttpBootDxe/HttpBootConfig.c  | 81 ++++++++++++++++++++------------
 NetworkPkg/HttpBootDxe/HttpBootDxe.inf   |  5 +-
 NetworkPkg/HttpBootDxe/HttpBootSupport.c | 53 ++++++++++++++++++++-
 NetworkPkg/HttpBootDxe/HttpBootSupport.h | 17 ++++++-
 NetworkPkg/HttpDxe/HttpDxe.inf           |  5 +-
 NetworkPkg/HttpDxe/HttpImpl.c            | 12 ++++-
 NetworkPkg/NetworkPkg.dec                |  8 +++-
 8 files changed, 164 insertions(+), 37 deletions(-)

diff --git a/NetworkPkg/HttpBootDxe/HttpBootClient.c b/NetworkPkg/HttpBootDxe/HttpBootClient.c
index 916f237..99db3d5 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootClient.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootClient.c
@@ -1,9 +1,9 @@
 /** @file
   Implementation of the boot file download function.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials are licensed and made available under 
 the terms and conditions of the BSD License that accompanies this distribution.  
 The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php.                                          
@@ -190,10 +190,19 @@ HttpBootDhcp4ExtractUriInfo (
     Private->BootFileUriParser = Private->FilePathUriParser;
     Private->BootFileUri = Private->FilePathUri;
   }
 
   //
+  // Check the URI scheme.
+  //
+  Status = HttpBootCheckUriScheme (Private->BootFileUri);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "HttpBootDhcp4ExtractUriInfo: %r.\n", Status));
+    return Status;
+  }
+
+  //
   // Configure the default DNS server if server assigned.
   //
   if ((SelectOffer->OfferType == HttpOfferTypeDhcpNameUriDns) || 
       (SelectOffer->OfferType == HttpOfferTypeDhcpDns) ||
       (SelectOffer->OfferType == HttpOfferTypeDhcpIpUriDns)) {
@@ -293,10 +302,19 @@ HttpBootDhcp6ExtractUriInfo (
     Private->BootFileUriParser = Private->FilePathUriParser;
     Private->BootFileUri = Private->FilePathUri;
   }
 
   //
+  // Check the URI scheme.
+  //
+  Status = HttpBootCheckUriScheme (Private->BootFileUri);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "HttpBootDhcp6ExtractUriInfo: %r.\n", Status));
+    return Status;
+  }
+
+  //
   //  Set the Local station address to IP layer.
   //
   Status = HttpBootSetIp6Address (Private);
   if (EFI_ERROR (Status)) {
     return Status;
diff --git a/NetworkPkg/HttpBootDxe/HttpBootConfig.c b/NetworkPkg/HttpBootDxe/HttpBootConfig.c
index 7c883b8..f32bf18 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootConfig.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootConfig.c
@@ -1,9 +1,9 @@
 /** @file
   Helper functions for configuring or getting the parameters relating to HTTP Boot.
 
-Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2016 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php
 
@@ -444,13 +444,20 @@ HttpBootFormCallback (
   IN OUT    EFI_IFR_TYPE_VALUE               *Value,
   OUT       EFI_BROWSER_ACTION_REQUEST       *ActionRequest
   )
 {
   EFI_INPUT_KEY                   Key;
-  UINTN                           Index;
   CHAR16                          *Uri;
+  UINTN                           UriLen;
+  CHAR8                           *AsciiUri;
   HTTP_BOOT_FORM_CALLBACK_INFO    *CallbackInfo;
+  EFI_STATUS                      Status;
+
+  Uri      = NULL;
+  UriLen   = 0;
+  AsciiUri = NULL;
+  Status   = EFI_SUCCESS;
   
   if (This == NULL || Value == NULL) {
     return EFI_INVALID_PARAMETER;
   }
 
@@ -464,53 +471,67 @@ HttpBootFormCallback (
   case KEY_INITIATOR_URI:
     //
     // Get user input URI string
     //
     Uri = HiiGetString (CallbackInfo->RegisteredHandle, Value->string, NULL);
-    if (Uri == NULL) {
-      return EFI_UNSUPPORTED;
-    }
 
     //
-    // Convert the scheme to all lower case.
+    // The URI should be either an empty string (for corporate environment) ,or http(s) for home environment.
+    // Pop up a message box for the unsupported URI.
     //
-    for (Index = 0; Index < StrLen (Uri); Index++) {
-      if (Uri[Index] == L':') {
-        break;
+    if (StrLen (Uri) != 0) {
+      UriLen = StrLen (Uri) + 1;
+      AsciiUri = AllocateZeroPool (UriLen);
+      if (AsciiUri == NULL) {
+        FreePool (Uri);
+        return EFI_OUT_OF_RESOURCES;
       }
-      if (Uri[Index] >= L'A' && Uri[Index] <= L'Z') {
-        Uri[Index] -= (CHAR16)(L'A' - L'a');
+
+      UnicodeStrToAsciiStrS (Uri, AsciiUri, UriLen);
+
+      Status = HttpBootCheckUriScheme (AsciiUri);
+      
+      if (Status == EFI_INVALID_PARAMETER) {
+
+        DEBUG ((EFI_D_ERROR, "HttpBootFormCallback: %r.\n", Status));
+
+        CreatePopUp (
+          EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+          &Key,
+          L"ERROR: Unsupported URI!",
+          L"Only supports HTTP and HTTPS",
+          NULL
+          ); 
+      } else if (Status == EFI_ACCESS_DENIED) {
+      
+        DEBUG ((EFI_D_ERROR, "HttpBootFormCallback: %r.\n", Status));
+      
+        CreatePopUp (
+          EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
+          &Key,
+          L"ERROR: Unsupported URI!",
+          L"HTTP is disabled",
+          NULL
+          );
       }
     }
 
-    //
-    // Set the converted URI string back
-    //
-    HiiSetString (CallbackInfo->RegisteredHandle, Value->string, Uri, NULL);
-
-    //
-    // The URI should be either an empty string (for corporate environment) ,or http(s) for home environment.
-    // Pop up a message box for other unsupported URI.
-    //
-    if ((StrLen (Uri) != 0) && (StrnCmp (Uri, L"http://", 7) != 0) && (StrnCmp (Uri, L"https://", 8) != 0)) {
-      CreatePopUp (
-        EFI_LIGHTGRAY | EFI_BACKGROUND_BLUE,
-        &Key,
-        L"ERROR: Unsupported URI!",
-        L"Only supports HTTP and HTTPS",
-        NULL
-        );
+    if (Uri != NULL) {
+      FreePool (Uri);
     }
 
-    FreePool (Uri);
+    if (AsciiUri != NULL) {
+      FreePool (AsciiUri);
+    }   
+    
     break;
 
   default:
     break;
   }
 
-  return EFI_SUCCESS;
+  return Status;
 }
 
 /**
   Initialize the configuration form.
 
diff --git a/NetworkPkg/HttpBootDxe/HttpBootDxe.inf b/NetworkPkg/HttpBootDxe/HttpBootDxe.inf
index e6ce864..982e6b4 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootDxe.inf
+++ b/NetworkPkg/HttpBootDxe/HttpBootDxe.inf
@@ -1,9 +1,9 @@
 ## @file
 #  This modules produce the Load File Protocol for UEFI HTTP boot.
 # 
-#  Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution.  The full text of the license may be found at
 #  http://opensource.org/licenses/bsd-license.php
 #  
@@ -92,7 +92,10 @@
   ## SOMETIMES_CONSUMES ## HII
   gHttpBootConfigGuid
   gEfiVirtualCdGuid            ## SOMETIMES_CONSUMES ## GUID
   gEfiVirtualDiskGuid          ## SOMETIMES_CONSUMES ## GUID
 
+[Pcd]
+  gEfiNetworkPkgTokenSpaceGuid.PcdAllowHttpConnections       ## CONSUMES  
+
 [UserExtensions.TianoCore."ExtraFiles"]
   HttpBootDxeExtra.uni
diff --git a/NetworkPkg/HttpBootDxe/HttpBootSupport.c b/NetworkPkg/HttpBootDxe/HttpBootSupport.c
index bdb29ae..69b129f 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootSupport.c
+++ b/NetworkPkg/HttpBootDxe/HttpBootSupport.c
@@ -1,9 +1,9 @@
 /** @file
   Support functions implementation for UEFI HTTP boot driver.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
 This program and the accompanying materials are licensed and made available under
 the terms and conditions of the BSD License that accompanies this distribution.
 The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php.                                          
@@ -987,10 +987,61 @@ HttpIoRecvResponse (
 
   return Status;
 }
 
 /**
+  This function checks the HTTP(S) URI scheme.
+
+  @param[in]    Uri              The pointer to the URI string.
+  
+  @retval EFI_SUCCESS            The URI scheme is valid.
+  @retval EFI_INVALID_PARAMETER  The URI scheme is not HTTP or HTTPS.
+  @retval EFI_ACCESS_DENIED      HTTP is disabled and the URI is HTTP.
+
+**/
+EFI_STATUS
+HttpBootCheckUriScheme (
+  IN      CHAR8                  *Uri
+  )
+{
+  UINTN                Index;
+  EFI_STATUS           Status;
+
+  Status = EFI_SUCCESS;
+
+  //
+  // Convert the scheme to all lower case.
+  //
+  for (Index = 0; Index < AsciiStrLen (Uri); Index++) {
+    if (Uri[Index] == ':') {
+      break;
+    }
+    if (Uri[Index] >= 'A' && Uri[Index] <= 'Z') {
+      Uri[Index] -= (CHAR8)('A' - 'a');
+    }
+  }
+
+  //
+  // Return EFI_INVALID_PARAMETER if the URI is not HTTP or HTTPS.
+  //
+  if ((AsciiStrnCmp (Uri, "http://", 7) != 0) && (AsciiStrnCmp (Uri, "https://", 8) != 0)) {
+    DEBUG ((EFI_D_ERROR, "HttpBootCheckUriScheme: Invalid Uri.\n"));
+    return EFI_INVALID_PARAMETER;
+  }
+  
+  //
+  // HTTP is disabled, return EFI_ACCESS_DENIED if the URI is HTTP.
+  //
+  if (!PcdGetBool (PcdAllowHttpConnections) && (AsciiStrnCmp (Uri, "http://", 7) == 0)) {
+    DEBUG ((EFI_D_ERROR, "HttpBootCheckUriScheme: HTTP is disabled.\n"));
+    return EFI_ACCESS_DENIED;
+  }
+
+  return Status;
+}
+
+/**
   Get the URI address string from the input device path.
 
   Caller need to free the buffer in the UriAddress pointer.
   
   @param[in]   FilePath         Pointer to the device path which contains a URI device path node.
diff --git a/NetworkPkg/HttpBootDxe/HttpBootSupport.h b/NetworkPkg/HttpBootDxe/HttpBootSupport.h
index 4d02427..65302d2 100644
--- a/NetworkPkg/HttpBootDxe/HttpBootSupport.h
+++ b/NetworkPkg/HttpBootDxe/HttpBootSupport.h
@@ -1,9 +1,9 @@
 /** @file
   Support functions declaration for UEFI HTTP boot driver.
 
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials are licensed and made available under 
 the terms and conditions of the BSD License that accompanies this distribution.  
 The full text of the license may be found at
 http://opensource.org/licenses/bsd-license.php.                                          
     
@@ -330,10 +330,25 @@ HttpIoRecvResponse (
   IN      BOOLEAN                  RecvMsgHeader,
      OUT  HTTP_IO_RESPONSE_DATA    *ResponseData
   );
 
 /**
+  This function checks the HTTP(S) URI scheme.
+
+  @param[in]    Uri              The pointer to the URI string.
+  
+  @retval EFI_SUCCESS            The URI scheme is valid.
+  @retval EFI_INVALID_PARAMETER  The URI scheme is not HTTP or HTTPS.
+  @retval EFI_ACCESS_DENIED      HTTP is disabled and the URI is HTTP.
+
+**/
+EFI_STATUS
+HttpBootCheckUriScheme (
+  IN      CHAR8                  *Uri
+  );
+
+/**
   Get the URI address string from the input device path.
 
   Caller need to free the buffer in the UriAddress pointer.
   
   @param[in]   FilePath         Pointer to the device path which contains a URI device path node.
diff --git a/NetworkPkg/HttpDxe/HttpDxe.inf b/NetworkPkg/HttpDxe/HttpDxe.inf
index 1118181..df2efdc 100644
--- a/NetworkPkg/HttpDxe/HttpDxe.inf
+++ b/NetworkPkg/HttpDxe/HttpDxe.inf
@@ -1,9 +1,9 @@
 ## @file
 #  Implementation of EFI HTTP protocol interfaces.
 #
-#  Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution. The full text of the license may be found at
 #  http://opensource.org/licenses/bsd-license.php.
@@ -73,7 +73,10 @@
   gEfiTlsConfigurationProtocolGuid                 ## SOMETIMES_CONSUMES
 
 [Guids]
   gEfiTlsCaCertificateGuid                         ## CONSUMES  ## GUID
 
+[Pcd]
+  gEfiNetworkPkgTokenSpaceGuid.PcdAllowHttpConnections       ## CONSUMES  
+
 [UserExtensions.TianoCore."ExtraFiles"]
   HttpDxeExtra.uni
\ No newline at end of file
diff --git a/NetworkPkg/HttpDxe/HttpImpl.c b/NetworkPkg/HttpDxe/HttpImpl.c
index d19f733..85b0083 100644
--- a/NetworkPkg/HttpDxe/HttpImpl.c
+++ b/NetworkPkg/HttpDxe/HttpImpl.c
@@ -1,9 +1,9 @@
 /** @file
   Implementation of EFI_HTTP_PROTOCOL protocol interfaces.
 
-  Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
   (C) Copyright 2015-2016 Hewlett Packard Enterprise Development LP<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -353,10 +353,20 @@ EfiHttpRequest (
     // be able to determine whether to use http or https.
     //
     HttpInstance->UseHttps = IsHttpsUrl (Url);
 
     //
+    // HTTP is disabled, return directly if the URI is not HTTPS.
+    //
+    if (!PcdGetBool (PcdAllowHttpConnections) && !(HttpInstance->UseHttps)) {
+      
+      DEBUG ((EFI_D_ERROR, "EfiHttpRequest: HTTP is disabled.\n"));
+
+      return EFI_ACCESS_DENIED;
+    }
+
+    //
     // Check whether we need to create Tls child and open the TLS protocol.
     //
     if (HttpInstance->UseHttps && HttpInstance->TlsChildHandle == NULL) {
       //
       // Use TlsSb to create Tls child and open the TLS protocol.
diff --git a/NetworkPkg/NetworkPkg.dec b/NetworkPkg/NetworkPkg.dec
index 24d45f4..d51f816 100644
--- a/NetworkPkg/NetworkPkg.dec
+++ b/NetworkPkg/NetworkPkg.dec
@@ -2,11 +2,11 @@
 # Network Package.
 #
 # This package provides network modules that conform to UEFI 2.4 specification.
 #
 # (C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
-# Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2009 - 2017, Intel Corporation. All rights reserved.<BR>
 #
 # This program and the accompanying materials are licensed and made available under
 # the terms and conditions of the BSD License which accompanies this distribution.
 # The full text of the license may be found at
 # http://opensource.org/licenses/bsd-license.php
@@ -77,10 +77,16 @@
 
   ## Private Key's size.
   # @Prompt Private Key's size.
   gEfiNetworkPkgTokenSpaceGuid.PcdIpsecUefiCertificateKeySize|0x3d5|UINT32|0x00000006
 
+  ## Indicates whether HTTP connections (i.e., unsecured) are permitted or not.
+  # TRUE  - HTTP connections is allowed. Both the "https://" and "http://" URI schemes are permitted.
+  # FALSE - HTTP connections is denied. Only the "https://" URI scheme is permitted.
+  # @Prompt Indicates whether HTTP connections are permitted or not.
+  gEfiNetworkPkgTokenSpaceGuid.PcdAllowHttpConnections|FALSE|BOOLEAN|0x00000008
+
 [PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
   ## IPv6 DHCP Unique Identifier (DUID) Type configuration (From RFCs 3315 and 6355).
   # 01 = DUID Based on Link-layer Address Plus Time [DUID-LLT]
   # 04 = UUID-Based DHCPv6 Unique Identifier (DUID-UUID)
   # 02 = DUID Assigned by Vendor Based on Enterprise Number [DUID-EN] (not supported)
-- 
1.9.5.msysgit.1