Merge pull request #11811 from jamesreprise/doc-aes-128-gcm->aes-256-gcm

Update documentation to reflect upgrading from AES-128 GCM to AES-256 GCM

fdbbackup/backup.actor.cpp

@@ -1132,7 +1132,7 @@ static void printBackupUsage(bool devhelp) {
 	       "                 This option indicates to the backup agent that it will only need to record the log files, "
 	       "and ignore the range files.\n");
 	printf("  --encryption-key-file"
-	       "                 The AES-128-GCM key in the provided file is used for encrypting backup files.\n");
+	       "                 The AES-256-GCM key in the provided file is used for encrypting backup files.\n");
 	printf("  --encrypt-files 0/1"
 	       "                 If passed, this argument will allow the user to override the database encryption state to "
 	       "either enable (1) or disable (0) encryption at rest with snapshot backups. This option refers to block "
@@ -1216,7 +1216,7 @@ static void printRestoreUsage(bool devhelp) {
 	       "                 Indicates to the backup agent to only begin replaying log files from a certain version, "
 	       "instead of the entire set.\n");
 	printf("  --encryption-key-file"
-	       "                 The AES-128-GCM key in the provided file is used for decrypting backup files.\n");
+	       "                 The AES-256-GCM key in the provided file is used for decrypting backup files.\n");
 	printf("  --blob-manifest-url URL\n"
 	       "                 Restore from blob granules. Manifest files are stored to the destination URL.\n");
 	printf(TLS_HELP);

fdbrpc/include/fdbrpc/AsyncFileEncrypted.h

@@ -29,7 +29,7 @@
 #include <array>
 
 /*
- * Append-only file encrypted using AES-128-GCM.
+ * Append-only file encrypted using AES-256-GCM.
  * */
 class AsyncFileEncrypted : public IAsyncFile, public ReferenceCounted<AsyncFileEncrypted> {
 public:

flow/include/flow/IAsyncFile.h

@@ -59,7 +59,7 @@ class IAsyncFile {
 		OPEN_NO_AIO =
 		    0x200000, // Don't use AsyncFileKAIO or similar implementations that rely on filesystem support for AIO
 		OPEN_CACHED_READ_ONLY = 0x400000, // AsyncFileCached opens files read/write even if you specify read only
-		OPEN_ENCRYPTED = 0x800000 // File is encrypted using AES-128-GCM (must be either read-only or write-only)
+		OPEN_ENCRYPTED = 0x800000 // File is encrypted using AES-256-GCM (must be either read-only or write-only)
 	};
 
 	virtual void addref() = 0;