Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c434d801 authored by David Anderson's avatar David Anderson
Browse files

libdm: Redact keys from dm-crypt targets when calling GetTable. 

Ignore-AOSP-First: security fix
Bug: 368069390
Test: libdm_test
Change-Id: I40b9a0129e58b1a0f116ca29f0ee66f91a27a73d
Merged-In: I40b9a0129e58b1a0f116ca29f0ee66f91a27a73d
parent fb73f178

fs_mgr/libdm/dm.cpp

+14 −0
Original line number Diff line number Diff line
@@ -494,6 +494,17 @@ bool DeviceMapper::GetTableInfo(const std::string& name, std::vector<TargetInfo> 
    return GetTable(name, DM_STATUS_TABLE_FLAG, table);

}



void RedactTableInfo(const struct dm_target_spec& spec, std::string* data) {

    if (DeviceMapper::GetTargetType(spec) == "crypt") {

        auto parts = android::base::Split(*data, " ");

        if (parts.size() < 2) {

            return;

        }

        parts[1] = "redacted";

        *data = android::base::Join(parts, " ");

    }

}



// private methods of DeviceMapper

bool DeviceMapper::GetTable(const std::string& name, uint32_t flags,

                            std::vector<TargetInfo>* table) {
@@ -532,6 +543,9 @@ bool DeviceMapper::GetTable(const std::string& name, uint32_t flags, 
            // Note: we use c_str() to eliminate any extra trailing 0s.

            data = std::string(&buffer[data_offset], next_cursor - data_offset).c_str();

        }

        if (flags & DM_STATUS_TABLE_FLAG) {

            RedactTableInfo(*spec, &data);

        }

        table->emplace_back(*spec, data);

        cursor = next_cursor;

    }