mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-23 22:49:28 -05:00
39 lines
1.7 KiB
Diff
39 lines
1.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Micay <danielmicay@gmail.com>
|
|
Date: Wed, 9 Sep 2020 01:53:11 -0400
|
|
Subject: [PATCH] pad filenames to 32 bytes instead of 16 or 4 bytes
|
|
|
|
This was adopted before the earliest stable release of GrapheneOS, so
|
|
backwards compatibility is not implemented anymore.
|
|
|
|
Signed-off-by: anupritaisno1 <www.anuprita804@gmail.com>
|
|
---
|
|
libfscrypt/fscrypt.cpp | 14 ++------------
|
|
1 file changed, 2 insertions(+), 12 deletions(-)
|
|
|
|
diff --git a/libfscrypt/fscrypt.cpp b/libfscrypt/fscrypt.cpp
|
|
index f6e97f11..b9cd7004 100644
|
|
--- a/libfscrypt/fscrypt.cpp
|
|
+++ b/libfscrypt/fscrypt.cpp
|
|
@@ -226,18 +226,8 @@ bool ParseOptionsForApiLevel(unsigned int first_api_level, const std::string& op
|
|
}
|
|
}
|
|
|
|
- // In the original setting of v1 policies and AES-256-CTS we used 4-byte
|
|
- // padding of filenames, so retain that on old first_api_levels.
|
|
- //
|
|
- // For everything else, use 16-byte padding. This is more secure (it helps
|
|
- // hide the length of filenames), and it makes the inputs evenly divisible
|
|
- // into cipher blocks which is more efficient for encryption and decryption.
|
|
- if (first_api_level <= __ANDROID_API_Q__ && options->version == 1 &&
|
|
- options->filenames_mode == FSCRYPT_MODE_AES_256_CTS) {
|
|
- options->flags |= FSCRYPT_POLICY_FLAGS_PAD_4;
|
|
- } else {
|
|
- options->flags |= FSCRYPT_POLICY_FLAGS_PAD_16;
|
|
- }
|
|
+ // GrapheneOS has always used the maximum 32 byte padding.
|
|
+ options->flags |= FSCRYPT_POLICY_FLAGS_PAD_32;
|
|
|
|
// Use DIRECT_KEY for Adiantum, since it's much more efficient but just as
|
|
// secure since Android doesn't reuse the same master key for multiple
|