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fstab: add support for metadata_encryption flag

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Change-Id: Ic1f12f280e9e99cfe3587e35b88a1f2e9d97a1b2
This commit is contained in:
Captain Throwback
2022-02-08 12:45:01 -05:00
parent cda1588bc5
commit 32bcdcd32e
1 changed files with 22 additions and 0 deletions
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partition.cpp
+22
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@@ -133,6 +133,7 @@ enum TW_FSTAB_FLAGS {
TWFLAG_DISPLAY,
TWFLAG_ENCRYPTABLE,
TWFLAG_FILEENCRYPTION,
TWFLAG_METADATA_ENCRYPTION,
TWFLAG_FLASHIMG,
TWFLAG_FORCEENCRYPT,
TWFLAG_FSFLAGS,
@@ -180,6 +181,7 @@ const struct flag_list tw_flags[] = {
{ "display=", TWFLAG_DISPLAY },
{ "encryptable=", TWFLAG_ENCRYPTABLE },
{ "fileencryption=", TWFLAG_FILEENCRYPTION },
{ "metadata_encryption=", TWFLAG_METADATA_ENCRYPTION },
{ "flashimg", TWFLAG_FLASHIMG },
{ "forceencrypt=", TWFLAG_FORCEENCRYPT },
{ "fsflags=", TWFLAG_FSFLAGS },
@@ -936,6 +938,26 @@ void TWPartition::Apply_TW_Flag(const unsigned flag, const char* str, const bool
LOGINFO("FBE contents '%s', filenames '%s'\n", FBE_contents.c_str(), FBE_filenames.c_str());
}
break;
case TWFLAG_METADATA_ENCRYPTION:
// This flag isn't used by TWRP but is needed for FBEv2 metadata decryption
// metadata_encryption=aes-256-xts:wrappedkey_v0
{
std::string META = str;
size_t colon_loc = META.find(":");
if (colon_loc == std::string::npos) {
property_set("metadata.contents", META.c_str());
property_set("metadata.filenames", "");
LOGINFO("Metadata contents '%s', filenames ''\n", META.c_str());
break;
}
std::string META_contents, META_filenames;
META_contents = META.substr(0, colon_loc);
META_filenames = META.substr(colon_loc + 1);
property_set("metadata.contents", META_contents.c_str());
property_set("metadata.filenames", META_filenames.c_str());
LOGINFO("Metadata contents '%s', filenames '%s'\n", META_contents.c_str(), META_filenames.c_str());
}
break;
case TWFLAG_WRAPPEDKEY:
// no more processing needed. leaving it here in case we want to do something in the future
break;