[iso] fix GRUB version detection for Fedora Rawhide

* How nice of "Open Source proponent" IBM/Red-Hat/Fedora to fix double space typos while making sure the
  provenance of the software they are using is hidden:
  https://src.fedoraproject.org/rpms/grub2/blob/rawhide/f/0024-Don-t-say-GNU-Linux-in-generated-menus.patch
* Long story short: Fedora fixed the double space in "GRUB  version", but of course they didn't upstream
  this change since it is part of a patch that removes every possible mention of GNU. This made our GRUB
  version detection break, since it relies on finding a "GRUB  version" string.
* Fix this by looking for both "GRUB  version" and "GRUB version".
* This, however, does not fix Fedora Rawhide BIOS boot, since they also added custom GRUB calls such as
  'grub_debug_is_enabled', which we don't have in our vanilla produced GRUB binary.
* Closes #2002.

ChangeLog.txt

@@ -1,16 +1,17 @@
 o Version 3.20 (2022.08.??)
     Enable applicable Windows User Experience options for Windows 10
-    Make Windows User Experience options persist between sessions
+    Remember last Windows User Experience selection between sessions
     Add automatic local account creation and regional options duplication
     (NB: This is limited to creating an account with the same name as the current user and
      with an empty password that the user will be prompted to change after first reboot)
     Add a workaround for ISOs that have a 'syslinux' symbolic link to '/isolinux/' (Knoppix)
-    Revert to inserting registry keys for the TPM/SB/RAM bypass where possible
+    Revert to offline insertion of registry keys for the TPM/SB/RAM bypass where possible
     Remove storage bypass, since this is a bogus bypass that doesn't do anything
     Improve BIOS compatibility when displaying the "UEFI boot only" alert message
     Fix Windows User Experience dialog appearing twice for Windows To Go
     Fix Windows User Experience options not being applied for ARM64
     Fix Microsoft Account bypass not being applied unless TPM/SB/RAM bypass is selected
+    Fix overeager detection of GRUB2 bootloaders with nonstandard prefixes
 
 o Version 3.19 (2022.07.01)
     Add a new selection dialog for Windows 11 setup customization:

src/iso.c

@@ -847,19 +847,28 @@ static int iso_extract_files(iso9660_t* p_iso, const char *psz_path)
 
 void GetGrubVersion(char* buf, size_t buf_size)
 {
+	// In typical "I'll make my own Open Source... with blackjack and hookers!" fashion,
+	// IBM/Red-Hat/Fedora took it upon themselves to "fix" the double space typo from the
+	// GRUB version string. But of course, just like their introduction of GRUB calls like
+	// 'grub_debug_is_enabled', they didn't want to bother upstreaming their changes...
+	// On the other hand, boy do they want to leech of FSF/GNU developed software, while
+	// not having it mention GNU anywhere. See:
+	// https://src.fedoraproject.org/rpms/grub2/blob/rawhide/f/0024-Don-t-say-GNU-Linux-in-generated-menus.patch
+	const char* grub_version_str[] = { "GRUB  version %s", "GRUB version %s" };
 	char *p, unauthorized[] = {'<', '>', ':', '|', '*', '?', '\\', '/'};
-	size_t i;
-	const char grub_version_str[] = "GRUB  version %s";
+	size_t i, j;
 
-	for (i=0; i<buf_size; i++) {
-		if (memcmp(&buf[i], grub_version_str, sizeof(grub_version_str)) == 0) {
-			static_strcpy(img_report.grub2_version, &buf[i + sizeof(grub_version_str)]);
-			break;
+	for (i = 0; i < buf_size; i++) {
+		for (j = 0; j < ARRAYSIZE(grub_version_str); j++) {
+			if (memcmp(&buf[i], grub_version_str[j], strlen(grub_version_str[j]) + 1) == 0) {
+				static_strcpy(img_report.grub2_version, &buf[i + strlen(grub_version_str[j]) + 1]);
+				break;
+			}
 		}
 	}
 	// Sanitize the string
 	for (p = &img_report.grub2_version[0]; *p; p++) {
-		for (i=0; i<sizeof(unauthorized); i++) {
+		for (i = 0; i < sizeof(unauthorized); i++) {
 			if (*p == unauthorized[i])
 				*p = '_';
 		}
@@ -1139,7 +1148,7 @@ BOOL ExtractISO(const char* src_iso, const char* dest_dir, BOOL scan)
 				// when using '/boot/grub2' as a prefix is very small and always located at the
 				// very end the file to patch the damn thing and get on with our life!
 				uprintf("  Detected Grub version: %s%s", img_report.grub2_version,
-					img_report.has_grub2 >= 1 ? " with NONSTANDARD prefix" : "");
+					img_report.has_grub2 > 1 ? " with NONSTANDARD prefix" : "");
 				for (k = 0; k < ARRAYSIZE(grub_patch); k++) {
 					if (strcmp(img_report.grub2_version, grub_patch[k].version) == 0)
 						break;

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 3.20.1926"
+CAPTION "Rufus 3.20.1927"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -395,8 +395,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,20,1926,0
- PRODUCTVERSION 3,20,1926,0
+ FILEVERSION 3,20,1927,0
+ PRODUCTVERSION 3,20,1927,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -414,13 +414,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "3.20.1926"
+            VALUE "FileVersion", "3.20.1927"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2022 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-3.20.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "3.20.1926"
+            VALUE "ProductVersion", "3.20.1927"
         END
     END
     BLOCK "VarFileInfo"