mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-14 10:24:32 -05:00
70 lines
3.1 KiB
Diff
70 lines
3.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Micay <danielmicay@gmail.com>
|
|
Date: Thu, 15 Dec 2016 17:22:41 -0500
|
|
Subject: [PATCH] fscrypt: pad filenames to 32 bytes, not 16 or 4
|
|
|
|
This is done in a way that's backwards compatible with old installations
|
|
by leaving them with the previous padding settings until factory reset.
|
|
---
|
|
libfscrypt/fscrypt.cpp | 26 ++++++++++++++++++++++++--
|
|
1 file changed, 24 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/libfscrypt/fscrypt.cpp b/libfscrypt/fscrypt.cpp
|
|
index adeb66aa..7b707b9f 100644
|
|
--- a/libfscrypt/fscrypt.cpp
|
|
+++ b/libfscrypt/fscrypt.cpp
|
|
@@ -118,7 +118,7 @@ static bool is_dir_empty(const char *dirname, bool *is_empty)
|
|
return true;
|
|
}
|
|
|
|
-static uint8_t fscrypt_get_policy_flags(int filenames_encryption_mode) {
|
|
+static uint8_t fscrypt_get_policy_flags_old(int filenames_encryption_mode) {
|
|
if (filenames_encryption_mode == FS_ENCRYPTION_MODE_AES_256_CTS) {
|
|
// Use legacy padding with our original filenames encryption mode.
|
|
return FS_POLICY_FLAGS_PAD_4;
|
|
@@ -135,6 +135,18 @@ static uint8_t fscrypt_get_policy_flags(int filenames_encryption_mode) {
|
|
return FS_POLICY_FLAGS_PAD_16;
|
|
}
|
|
|
|
+static uint8_t fscrypt_get_policy_flags(int filenames_encryption_mode) {
|
|
+ if (filenames_encryption_mode == FS_ENCRYPTION_MODE_ADIANTUM) {
|
|
+ return FS_POLICY_FLAGS_PAD_32 | FS_POLICY_FLAG_DIRECT_KEY;
|
|
+ }
|
|
+ return FS_POLICY_FLAGS_PAD_32;
|
|
+}
|
|
+
|
|
+static bool fscrypt_policy_check(const char *directory, const char *policy,
|
|
+ size_t policy_length,
|
|
+ int contents_encryption_mode,
|
|
+ int filenames_encryption_mode);
|
|
+
|
|
static bool fscrypt_policy_set(const char *directory, const char *policy,
|
|
size_t policy_length,
|
|
int contents_encryption_mode,
|
|
@@ -153,6 +165,14 @@ static bool fscrypt_policy_set(const char *directory, const char *policy,
|
|
}
|
|
|
|
fscrypt_policy fp;
|
|
+ memset(&fp, 0, sizeof(fscrypt_policy));
|
|
+
|
|
+ if (ioctl(fd, FS_IOC_GET_ENCRYPTION_POLICY, &fp) == 0) {
|
|
+ close(fd);
|
|
+ return fscrypt_policy_check(directory, policy, policy_length,
|
|
+ contents_encryption_mode, filenames_encryption_mode);
|
|
+ }
|
|
+
|
|
fp.version = 0;
|
|
fp.contents_encryption_mode = contents_encryption_mode;
|
|
fp.filenames_encryption_mode = filenames_encryption_mode;
|
|
@@ -200,7 +220,9 @@ static bool fscrypt_policy_get(const char *directory, char *policy,
|
|
|| (fp.contents_encryption_mode != contents_encryption_mode)
|
|
|| (fp.filenames_encryption_mode != filenames_encryption_mode)
|
|
|| (fp.flags !=
|
|
- fscrypt_get_policy_flags(filenames_encryption_mode))) {
|
|
+ fscrypt_get_policy_flags(filenames_encryption_mode) &&
|
|
+ fp.flags !=
|
|
+ fscrypt_get_policy_flags_old(filenames_encryption_mode))) {
|
|
LOG(ERROR) << "Failed to find matching encryption policy for " << directory;
|
|
return false;
|
|
}
|