| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef OBBFILE_H_ |
| #define OBBFILE_H_ |
| |
| #include <stdint.h> |
| #include <strings.h> |
| |
| #include <utils/RefBase.h> |
| #include <utils/String8.h> |
| |
| namespace android { |
| |
| // OBB flags (bit 0) |
| #define OBB_OVERLAY (1 << 0) |
| #define OBB_SALTED (1 << 1) |
| |
| class ObbFile : public RefBase { |
| protected: |
| virtual ~ObbFile(); |
| |
| public: |
| ObbFile(); |
| |
| bool readFrom(const char* filename); |
| bool readFrom(int fd); |
| bool writeTo(const char* filename); |
| bool writeTo(int fd); |
| bool removeFrom(const char* filename); |
| bool removeFrom(int fd); |
| |
| const char* getFileName() const { |
| return mFileName; |
| } |
| |
| const String8 getPackageName() const { |
| return mPackageName; |
| } |
| |
| void setPackageName(String8 packageName) { |
| mPackageName = packageName; |
| } |
| |
| int32_t getVersion() const { |
| return mVersion; |
| } |
| |
| void setVersion(int32_t version) { |
| mVersion = version; |
| } |
| |
| int32_t getFlags() const { |
| return mFlags; |
| } |
| |
| void setFlags(int32_t flags) { |
| mFlags = flags; |
| } |
| |
| const unsigned char* getSalt(size_t* length) const { |
| if ((mFlags & OBB_SALTED) == 0) { |
| *length = 0; |
| return NULL; |
| } |
| |
| *length = sizeof(mSalt); |
| return mSalt; |
| } |
| |
| bool setSalt(const unsigned char* salt, size_t length) { |
| if (length != sizeof(mSalt)) { |
| return false; |
| } |
| |
| memcpy(mSalt, salt, sizeof(mSalt)); |
| mFlags |= OBB_SALTED; |
| return true; |
| } |
| |
| bool isOverlay() { |
| return (mFlags & OBB_OVERLAY) == OBB_OVERLAY; |
| } |
| |
| void setOverlay(bool overlay) { |
| if (overlay) { |
| mFlags |= OBB_OVERLAY; |
| } else { |
| mFlags &= ~OBB_OVERLAY; |
| } |
| } |
| |
| static inline uint32_t get4LE(const unsigned char* buf) { |
| return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24); |
| } |
| |
| static inline void put4LE(unsigned char* buf, uint32_t val) { |
| buf[0] = val & 0xFF; |
| buf[1] = (val >> 8) & 0xFF; |
| buf[2] = (val >> 16) & 0xFF; |
| buf[3] = (val >> 24) & 0xFF; |
| } |
| |
| private: |
| /* Package name this ObbFile is associated with */ |
| String8 mPackageName; |
| |
| /* Package version this ObbFile is associated with */ |
| int32_t mVersion; |
| |
| /* Flags for this OBB type. */ |
| int32_t mFlags; |
| |
| /* The encryption salt. */ |
| unsigned char mSalt[8]; |
| |
| const char* mFileName; |
| |
| size_t mFooterStart; |
| |
| bool parseObbFile(int fd); |
| }; |
| |
| } |
| #endif /* OBBFILE_H_ */ |