Jixun Wu
2 years ago
39 changed files with 2434 additions and 204 deletions
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#!/usr/bin/env bash |
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set -e |
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pushd ./src/QmcWasm |
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bash build-wasm |
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popd |
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pushd ./src/KgmWasm |
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bash build-wasm |
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popd |
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# CMakeList.txt : CMake project for KgmWasm, include source and define |
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# project specific logic here. |
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# |
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cmake_minimum_required (VERSION 3.8) |
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project ("KgmWasm") |
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set(CMAKE_CXX_STANDARD 14) |
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include_directories( |
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$<TARGET_PROPERTY:INTERFACE_INCLUDE_DIRECTORIES> |
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) |
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# Add source to this project's executable. |
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set(RUNTIME_METHODS_LIST |
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getValue |
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writeArrayToMemory |
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UTF8ToString |
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) |
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list(JOIN RUNTIME_METHODS_LIST "," RUNTIME_METHODS) |
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set(EMSCRIPTEN_FLAGS |
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"--bind" |
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"-s NO_DYNAMIC_EXECUTION=1" |
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"-s MODULARIZE=1" |
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"-s EXPORT_NAME=KgmCryptoModule" |
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"-s EXPORTED_RUNTIME_METHODS=${RUNTIME_METHODS}" |
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) |
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set(EMSCRIPTEN_LEGACY_FLAGS |
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${EMSCRIPTEN_FLAGS} |
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"-s WASM=0" |
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"--memory-init-file 0" |
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) |
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set(EMSCRIPTEN_WASM_BUNDLE_FLAGS |
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${EMSCRIPTEN_FLAGS} |
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"-s SINGLE_FILE=1" |
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) |
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list(JOIN EMSCRIPTEN_FLAGS " " EMSCRIPTEN_FLAGS_STR) |
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list(JOIN EMSCRIPTEN_LEGACY_FLAGS " " EMSCRIPTEN_LEGACY_FLAGS_STR) |
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list(JOIN EMSCRIPTEN_WASM_BUNDLE_FLAGS " " EMSCRIPTEN_WASM_BUNDLE_FLAGS_STR) |
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# Define projects config |
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set(WASM_SOURCES |
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"KgmWasm.cpp" |
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) |
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add_executable(KgmWasm ${WASM_SOURCES}) |
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set_target_properties( |
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KgmWasm |
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PROPERTIES LINK_FLAGS ${EMSCRIPTEN_FLAGS_STR} |
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) |
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add_executable(KgmWasmBundle ${WASM_SOURCES}) |
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set_target_properties( |
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KgmWasmBundle |
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PROPERTIES LINK_FLAGS ${EMSCRIPTEN_WASM_BUNDLE_FLAGS_STR} |
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) |
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add_executable(KgmLegacy ${WASM_SOURCES}) |
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set_target_properties( |
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KgmLegacy |
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PROPERTIES LINK_FLAGS ${EMSCRIPTEN_LEGACY_FLAGS_STR} |
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) |
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// KgmWasm.cpp : Defines the entry point for the application.
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//
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#include "KgmWasm.h" |
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#include "kgm.hpp" |
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#include <stddef.h> |
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#include <string.h> |
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size_t preDec(uintptr_t blob, size_t blobSize, std::string ext) |
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{ |
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return PreDec((uint8_t*)blob, blobSize, ext == "vpr"); |
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} |
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void decBlob(uintptr_t blob, size_t blobSize, size_t offset) |
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{ |
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Decrypt((uint8_t*)blob, blobSize, offset); |
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return; |
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} |
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// KgmWasm.h : Include file for standard system include files,
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// or project specific include files.
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#pragma once |
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#include <emscripten/bind.h> |
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#include <string> |
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namespace em = emscripten; |
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size_t preDec(uintptr_t blob, size_t blobSize, std::string ext); |
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void decBlob(uintptr_t blob, size_t blobSize, size_t offset); |
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EMSCRIPTEN_BINDINGS(QmcCrypto) |
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{ |
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em::function("preDec", &preDec, em::allow_raw_pointers()); |
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em::function("decBlob", &decBlob, em::allow_raw_pointers()); |
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} |
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@ -0,0 +1,9 @@ |
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# KgmWasm |
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## 构建 |
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在 Linux 环境下执行 `bash build-wasm` 即可构建。 |
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## Build |
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Linux environment required. Build wasm binary by execute `bash build-wasm`. |
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@ -0,0 +1,41 @@ |
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#!/usr/bin/env bash |
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set -e |
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pushd "$(realpath "$(dirname "$0")")" |
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CURR_DIR="${PWD}" |
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BUILD_TYPE="$1" |
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if [ -z "$BUILD_TYPE" ]; then |
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BUILD_TYPE=Release |
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fi |
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mkdir -p build/wasm |
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if [ ! -d build/emsdk ]; then |
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git clone https://github.com/emscripten-core/emsdk.git build/emsdk |
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fi |
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pushd build/emsdk |
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#git pull |
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./emsdk install 3.0.0 |
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./emsdk activate 3.0.0 |
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source ./emsdk_env.sh |
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popd # build/emsdk |
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pushd build/wasm |
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emcmake cmake -DCMAKE_BUILD_TYPE="$BUILD_TYPE" ../.. |
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make -j |
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TARGET_FILES=" |
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KgmLegacy.js |
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KgmWasm.js |
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KgmWasm.wasm |
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KgmWasmBundle.js |
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" |
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#mkdir -p "${CURR_DIR}/npm" |
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#cp $TARGET_FILES "${CURR_DIR}/npm/" |
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cp $TARGET_FILES "${CURR_DIR}/" |
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popd # build/wasm |
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popd |
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@ -0,0 +1,112 @@ |
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#include <vector> |
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std::vector<uint8_t> VprHeader = { |
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0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43, |
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0x91, 0xAA, 0xBD, 0xD0, 0x7A, 0xF5, 0x36, 0x31 }; |
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std::vector<uint8_t> KgmHeader = { |
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0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B, |
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0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14 }; |
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std::vector<uint8_t> VprMaskDiff = { |
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0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E, |
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0x2F, 0x80, 0xF3, 0x2D, 0xB8, 0xB6, 0xE3, 0x11, 0x00 }; |
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std::vector<uint8_t> MaskV2; |
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std::vector<uint8_t> table1 = { |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x01, 0x21, 0x01, 0x61, 0x01, 0x21, 0x01, 0xe1, 0x01, 0x21, 0x01, 0x61, 0x01, 0x21, 0x01, |
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0xd2, 0x23, 0x02, 0x02, 0x42, 0x42, 0x02, 0x02, 0xc2, 0xc2, 0x02, 0x02, 0x42, 0x42, 0x02, 0x02, |
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0xd3, 0xd3, 0x02, 0x03, 0x63, 0x43, 0x63, 0x03, 0xe3, 0xc3, 0xe3, 0x03, 0x63, 0x43, 0x63, 0x03, |
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0x94, 0xb4, 0x94, 0x65, 0x04, 0x04, 0x04, 0x04, 0x84, 0x84, 0x84, 0x84, 0x04, 0x04, 0x04, 0x04, |
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0x95, 0x95, 0x95, 0x95, 0x04, 0x05, 0x25, 0x05, 0xe5, 0x85, 0xa5, 0x85, 0xe5, 0x05, 0x25, 0x05, |
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0xd6, 0xb6, 0x96, 0xb6, 0xd6, 0x27, 0x06, 0x06, 0xc6, 0xc6, 0x86, 0x86, 0xc6, 0xc6, 0x06, 0x06, |
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0xd7, 0xd7, 0x97, 0x97, 0xd7, 0xd7, 0x06, 0x07, 0xe7, 0xc7, 0xe7, 0x87, 0xe7, 0xc7, 0xe7, 0x07, |
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0x18, 0x38, 0x18, 0x78, 0x18, 0x38, 0x18, 0xe9, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, |
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0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x08, 0x09, 0x29, 0x09, 0x69, 0x09, 0x29, 0x09, |
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0xda, 0x3a, 0x1a, 0x3a, 0x5a, 0x3a, 0x1a, 0x3a, 0xda, 0x2b, 0x0a, 0x0a, 0x4a, 0x4a, 0x0a, 0x0a, |
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0xdb, 0xdb, 0x1b, 0x1b, 0x5b, 0x5b, 0x1b, 0x1b, 0xdb, 0xdb, 0x0a, 0x0b, 0x6b, 0x4b, 0x6b, 0x0b, |
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0x9c, 0xbc, 0x9c, 0x7c, 0x1c, 0x3c, 0x1c, 0x7c, 0x9c, 0xbc, 0x9c, 0x6d, 0x0c, 0x0c, 0x0c, 0x0c, |
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0x9d, 0x9d, 0x9d, 0x9d, 0x1d, 0x1d, 0x1d, 0x1d, 0x9d, 0x9d, 0x9d, 0x9d, 0x0c, 0x0d, 0x2d, 0x0d, |
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0xde, 0xbe, 0x9e, 0xbe, 0xde, 0x3e, 0x1e, 0x3e, 0xde, 0xbe, 0x9e, 0xbe, 0xde, 0x2f, 0x0e, 0x0e, |
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0xdf, 0xdf, 0x9f, 0x9f, 0xdf, 0xdf, 0x1f, 0x1f, 0xdf, 0xdf, 0x9f, 0x9f, 0xdf, 0xdf, 0x0e, 0x0f, |
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0x00, 0x20, 0x00, 0x60, 0x00, 0x20, 0x00, 0xe0, 0x00, 0x20, 0x00, 0x60, 0x00, 0x20, 0x00, 0xf1 |
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}; |
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std::vector<uint8_t> table2 = { |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x01, 0x23, 0x01, 0x67, 0x01, 0x23, 0x01, 0xef, 0x01, 0x23, 0x01, 0x67, 0x01, 0x23, 0x01, |
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0xdf, 0x21, 0x02, 0x02, 0x46, 0x46, 0x02, 0x02, 0xce, 0xce, 0x02, 0x02, 0x46, 0x46, 0x02, 0x02, |
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0xde, 0xde, 0x02, 0x03, 0x65, 0x47, 0x65, 0x03, 0xed, 0xcf, 0xed, 0x03, 0x65, 0x47, 0x65, 0x03, |
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0x9d, 0xbf, 0x9d, 0x63, 0x04, 0x04, 0x04, 0x04, 0x8c, 0x8c, 0x8c, 0x8c, 0x04, 0x04, 0x04, 0x04, |
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0x9c, 0x9c, 0x9c, 0x9c, 0x04, 0x05, 0x27, 0x05, 0xeb, 0x8d, 0xaf, 0x8d, 0xeb, 0x05, 0x27, 0x05, |
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0xdb, 0xbd, 0x9f, 0xbd, 0xdb, 0x25, 0x06, 0x06, 0xca, 0xca, 0x8e, 0x8e, 0xca, 0xca, 0x06, 0x06, |
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0xda, 0xda, 0x9e, 0x9e, 0xda, 0xda, 0x06, 0x07, 0xe9, 0xcb, 0xe9, 0x8f, 0xe9, 0xcb, 0xe9, 0x07, |
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0x19, 0x3b, 0x19, 0x7f, 0x19, 0x3b, 0x19, 0xe7, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, |
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x08, 0x09, 0x2b, 0x09, 0x6f, 0x09, 0x2b, 0x09, |
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0xd7, 0x39, 0x1b, 0x39, 0x5f, 0x39, 0x1b, 0x39, 0xd7, 0x29, 0x0a, 0x0a, 0x4e, 0x4e, 0x0a, 0x0a, |
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0xd6, 0xd6, 0x1a, 0x1a, 0x5e, 0x5e, 0x1a, 0x1a, 0xd6, 0xd6, 0x0a, 0x0b, 0x6d, 0x4f, 0x6d, 0x0b, |
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0x95, 0xb7, 0x95, 0x7b, 0x1d, 0x3f, 0x1d, 0x7b, 0x95, 0xb7, 0x95, 0x6b, 0x0c, 0x0c, 0x0c, 0x0c, |
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0x94, 0x94, 0x94, 0x94, 0x1c, 0x1c, 0x1c, 0x1c, 0x94, 0x94, 0x94, 0x94, 0x0c, 0x0d, 0x2f, 0x0d, |
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0xd3, 0xb5, 0x97, 0xb5, 0xd3, 0x3d, 0x1f, 0x3d, 0xd3, 0xb5, 0x97, 0xb5, 0xd3, 0x2d, 0x0e, 0x0e, |
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0xd2, 0xd2, 0x96, 0x96, 0xd2, 0xd2, 0x1e, 0x1e, 0xd2, 0xd2, 0x96, 0x96, 0xd2, 0xd2, 0x0e, 0x0f, |
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0x00, 0x22, 0x00, 0x66, 0x00, 0x22, 0x00, 0xee, 0x00, 0x22, 0x00, 0x66, 0x00, 0x22, 0x00, 0xfe |
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}; |
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std::vector<uint8_t> MaskV2PreDef = { |
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0xB8, 0xD5, 0x3D, 0xB2, 0xE9, 0xAF, 0x78, 0x8C, 0x83, 0x33, 0x71, 0x51, 0x76, 0xA0, 0xCD, 0x37, |
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0x2F, 0x3E, 0x35, 0x8D, 0xA9, 0xBE, 0x98, 0xB7, 0xE7, 0x8C, 0x22, 0xCE, 0x5A, 0x61, 0xDF, 0x68, |
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0x69, 0x89, 0xFE, 0xA5, 0xB6, 0xDE, 0xA9, 0x77, 0xFC, 0xC8, 0xBD, 0xBD, 0xE5, 0x6D, 0x3E, 0x5A, |
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0x36, 0xEF, 0x69, 0x4E, 0xBE, 0xE1, 0xE9, 0x66, 0x1C, 0xF3, 0xD9, 0x02, 0xB6, 0xF2, 0x12, 0x9B, |
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0x44, 0xD0, 0x6F, 0xB9, 0x35, 0x89, 0xB6, 0x46, 0x6D, 0x73, 0x82, 0x06, 0x69, 0xC1, 0xED, 0xD7, |
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0x85, 0xC2, 0x30, 0xDF, 0xA2, 0x62, 0xBE, 0x79, 0x2D, 0x62, 0x62, 0x3D, 0x0D, 0x7E, 0xBE, 0x48, |
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0x89, 0x23, 0x02, 0xA0, 0xE4, 0xD5, 0x75, 0x51, 0x32, 0x02, 0x53, 0xFD, 0x16, 0x3A, 0x21, 0x3B, |
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0x16, 0x0F, 0xC3, 0xB2, 0xBB, 0xB3, 0xE2, 0xBA, 0x3A, 0x3D, 0x13, 0xEC, 0xF6, 0x01, 0x45, 0x84, |
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0xA5, 0x70, 0x0F, 0x93, 0x49, 0x0C, 0x64, 0xCD, 0x31, 0xD5, 0xCC, 0x4C, 0x07, 0x01, 0x9E, 0x00, |
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0x1A, 0x23, 0x90, 0xBF, 0x88, 0x1E, 0x3B, 0xAB, 0xA6, 0x3E, 0xC4, 0x73, 0x47, 0x10, 0x7E, 0x3B, |
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0x5E, 0xBC, 0xE3, 0x00, 0x84, 0xFF, 0x09, 0xD4, 0xE0, 0x89, 0x0F, 0x5B, 0x58, 0x70, 0x4F, 0xFB, |
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0x65, 0xD8, 0x5C, 0x53, 0x1B, 0xD3, 0xC8, 0xC6, 0xBF, 0xEF, 0x98, 0xB0, 0x50, 0x4F, 0x0F, 0xEA, |
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0xE5, 0x83, 0x58, 0x8C, 0x28, 0x2C, 0x84, 0x67, 0xCD, 0xD0, 0x9E, 0x47, 0xDB, 0x27, 0x50, 0xCA, |
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0xF4, 0x63, 0x63, 0xE8, 0x97, 0x7F, 0x1B, 0x4B, 0x0C, 0xC2, 0xC1, 0x21, 0x4C, 0xCC, 0x58, 0xF5, |
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0x94, 0x52, 0xA3, 0xF3, 0xD3, 0xE0, 0x68, 0xF4, 0x00, 0x23, 0xF3, 0x5E, 0x0A, 0x7B, 0x93, 0xDD, |
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0xAB, 0x12, 0xB2, 0x13, 0xE8, 0x84, 0xD7, 0xA7, 0x9F, 0x0F, 0x32, 0x4C, 0x55, 0x1D, 0x04, 0x36, |
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0x52, 0xDC, 0x03, 0xF3, 0xF9, 0x4E, 0x42, 0xE9, 0x3D, 0x61, 0xEF, 0x7C, 0xB6, 0xB3, 0x93, 0x50, |
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}; |
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uint8_t getMask(size_t pos) { |
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size_t offset = pos >> 4; |
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uint8_t value = 0; |
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while (offset >= 0x11) { |
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value ^= table1[offset % 272]; |
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offset >>= 4; |
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value ^= table2[offset % 272]; |
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offset >>= 4; |
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} |
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return MaskV2PreDef[pos % 272] ^ value; |
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} |
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std::vector<uint8_t> key(17); |
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bool isVpr = false; |
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size_t PreDec(uint8_t* fileData, size_t size, bool iV) { |
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uint32_t headerLen = *(uint32_t*)(fileData + 0x10); |
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memcpy(key.data(), (fileData + 0x1C), 0x10); |
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key[16] = 0; |
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isVpr = iV; |
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return headerLen; |
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} |
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void Decrypt(uint8_t* fileData, size_t size, size_t offset) { |
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for (size_t i = 0; i < size; ++i) { |
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uint8_t med8 = key[(i + offset) % 17] ^ fileData[i]; |
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med8 ^= (med8 & 0xf) << 4; |
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uint8_t msk8 = getMask(i + offset); |
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msk8 ^= (msk8 & 0xf) << 4; |
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fileData[i] = med8 ^ msk8; |
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if (isVpr) { |
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fileData[i] ^= VprMaskDiff[(i + offset) % 17]; |
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} |
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} |
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} |
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@ -0,0 +1,65 @@ |
|||||
|
# CMakeList.txt : CMake project for QmcWasm, include source and define |
||||
|
# project specific logic here. |
||||
|
# |
||||
|
cmake_minimum_required (VERSION 3.8) |
||||
|
|
||||
|
project ("QmcWasm") |
||||
|
|
||||
|
set(CMAKE_CXX_STANDARD 14) |
||||
|
|
||||
|
include_directories( |
||||
|
$<TARGET_PROPERTY:INTERFACE_INCLUDE_DIRECTORIES> |
||||
|
) |
||||
|
|
||||
|
# Add source to this project's executable. |
||||
|
set(RUNTIME_METHODS_LIST |
||||
|
getValue |
||||
|
writeArrayToMemory |
||||
|
UTF8ToString |
||||
|
) |
||||
|
list(JOIN RUNTIME_METHODS_LIST "," RUNTIME_METHODS) |
||||
|
|
||||
|
set(EMSCRIPTEN_FLAGS |
||||
|
"--bind" |
||||
|
"-s NO_DYNAMIC_EXECUTION=1" |
||||
|
"-s MODULARIZE=1" |
||||
|
"-s EXPORT_NAME=QmcCryptoModule" |
||||
|
"-s EXPORTED_RUNTIME_METHODS=${RUNTIME_METHODS}" |
||||
|
) |
||||
|
set(EMSCRIPTEN_LEGACY_FLAGS |
||||
|
${EMSCRIPTEN_FLAGS} |
||||
|
"-s WASM=0" |
||||
|
"--memory-init-file 0" |
||||
|
) |
||||
|
set(EMSCRIPTEN_WASM_BUNDLE_FLAGS |
||||
|
${EMSCRIPTEN_FLAGS} |
||||
|
"-s SINGLE_FILE=1" |
||||
|
) |
||||
|
|
||||
|
list(JOIN EMSCRIPTEN_FLAGS " " EMSCRIPTEN_FLAGS_STR) |
||||
|
list(JOIN EMSCRIPTEN_LEGACY_FLAGS " " EMSCRIPTEN_LEGACY_FLAGS_STR) |
||||
|
list(JOIN EMSCRIPTEN_WASM_BUNDLE_FLAGS " " EMSCRIPTEN_WASM_BUNDLE_FLAGS_STR) |
||||
|
|
||||
|
# Define projects config |
||||
|
set(WASM_SOURCES |
||||
|
"QmcWasm.cpp" |
||||
|
) |
||||
|
|
||||
|
add_executable(QmcWasm ${WASM_SOURCES}) |
||||
|
set_target_properties( |
||||
|
QmcWasm |
||||
|
PROPERTIES LINK_FLAGS ${EMSCRIPTEN_FLAGS_STR} |
||||
|
) |
||||
|
|
||||
|
add_executable(QmcWasmBundle ${WASM_SOURCES}) |
||||
|
set_target_properties( |
||||
|
QmcWasmBundle |
||||
|
PROPERTIES LINK_FLAGS ${EMSCRIPTEN_WASM_BUNDLE_FLAGS_STR} |
||||
|
) |
||||
|
|
||||
|
add_executable(QmcLegacy ${WASM_SOURCES}) |
||||
|
set_target_properties( |
||||
|
QmcLegacy |
||||
|
PROPERTIES LINK_FLAGS ${EMSCRIPTEN_LEGACY_FLAGS_STR} |
||||
|
) |
||||
|
|
||||
@ -0,0 +1,57 @@ |
|||||
|
// QmcWasm.cpp : Defines the entry point for the application.
|
||||
|
//
|
||||
|
|
||||
|
#include "QmcWasm.h" |
||||
|
|
||||
|
#include "qmc.hpp" |
||||
|
|
||||
|
#include <stddef.h> |
||||
|
#include <string.h> |
||||
|
|
||||
|
std::string err = ""; |
||||
|
std::string sid = ""; |
||||
|
QmcDecode e; |
||||
|
|
||||
|
int preDec(uintptr_t blob, size_t blobSize, std::string ext) |
||||
|
{ |
||||
|
if (!e.SetBlob((uint8_t*)blob, blobSize)) |
||||
|
{ |
||||
|
err = "cannot allocate memory"; |
||||
|
return -1; |
||||
|
} |
||||
|
int tailSize = e.PreDecode(ext); |
||||
|
if (e.error != "") |
||||
|
{ |
||||
|
err = e.error; |
||||
|
return -1; |
||||
|
} |
||||
|
sid = e.songId; |
||||
|
return tailSize; |
||||
|
} |
||||
|
|
||||
|
size_t decBlob(uintptr_t blob, size_t blobSize, size_t offset) |
||||
|
{ |
||||
|
if (!e.SetBlob((uint8_t*)blob, blobSize)) |
||||
|
{ |
||||
|
err = "cannot allocate memory"; |
||||
|
return 0; |
||||
|
} |
||||
|
std::vector<uint8_t> decData = e.Decode(offset); |
||||
|
if (e.error != "") |
||||
|
{ |
||||
|
err = e.error; |
||||
|
return 0; |
||||
|
} |
||||
|
memcpy((uint8_t*)blob, decData.data(), decData.size()); |
||||
|
return decData.size(); |
||||
|
} |
||||
|
|
||||
|
std::string getErr() |
||||
|
{ |
||||
|
return err; |
||||
|
} |
||||
|
|
||||
|
std::string getSongId() |
||||
|
{ |
||||
|
return sid; |
||||
|
} |
||||
@ -0,0 +1,23 @@ |
|||||
|
// QmcWasm.h : Include file for standard system include files,
|
||||
|
// or project specific include files.
|
||||
|
|
||||
|
#pragma once |
||||
|
|
||||
|
#include <emscripten/bind.h> |
||||
|
#include <string> |
||||
|
|
||||
|
namespace em = emscripten; |
||||
|
|
||||
|
int preDec(uintptr_t blob, size_t blobSize, std::string ext); |
||||
|
size_t decBlob(uintptr_t blob, size_t blobSize, size_t offset); |
||||
|
std::string getErr(); |
||||
|
std::string getSongId(); |
||||
|
|
||||
|
EMSCRIPTEN_BINDINGS(QmcCrypto) |
||||
|
{ |
||||
|
em::function("getErr", &getErr); |
||||
|
em::function("getSongId", &getSongId); |
||||
|
|
||||
|
em::function("preDec", &preDec, em::allow_raw_pointers()); |
||||
|
em::function("decBlob", &decBlob, em::allow_raw_pointers()); |
||||
|
} |
||||
@ -0,0 +1,9 @@ |
|||||
|
# QmcWasm |
||||
|
|
||||
|
## 构建 |
||||
|
|
||||
|
在 Linux 环境下执行 `bash build-wasm` 即可构建。 |
||||
|
|
||||
|
## Build |
||||
|
|
||||
|
Linux environment required. Build wasm binary by execute `bash build-wasm`. |
||||
@ -0,0 +1,289 @@ |
|||||
|
#ifndef QQMUSIC_CPP_TENCENTTEA_HPP |
||||
|
#define QQMUSIC_CPP_TENCENTTEA_HPP |
||||
|
|
||||
|
#include <cstdlib> |
||||
|
#include <cstdio> |
||||
|
#include <cstdint> |
||||
|
#include <vector> |
||||
|
#include <time.h> |
||||
|
#include <arpa/inet.h> |
||||
|
|
||||
|
const uint32_t DELTA = 0x9e3779b9; |
||||
|
|
||||
|
#define ROUNDS 32 |
||||
|
#define SALT_LEN 2 |
||||
|
#define ZERO_LEN 7 |
||||
|
|
||||
|
void TeaDecryptECB(uint8_t* src, uint8_t* dst, std::vector<uint8_t> key, size_t rounds = ROUNDS) { |
||||
|
if (key.size() != 16 || (rounds & 1) != 0) |
||||
|
{ |
||||
|
return; |
||||
|
} |
||||
|
uint32_t y, z, sum; |
||||
|
uint32_t k[4]; |
||||
|
int i; |
||||
|
|
||||
|
//now encrypted buf is TCP/IP-endian;
|
||||
|
//TCP/IP network byte order (which is big-endian).
|
||||
|
y = ntohl(*((uint32_t*)src)); |
||||
|
z = ntohl(*((uint32_t*)(src + 4))); |
||||
|
//std::cout << ntohl(0x0a3aea41);
|
||||
|
|
||||
|
for (i = 0; i < 4; i++) { |
||||
|
//key is TCP/IP-endian;
|
||||
|
k[i] = ntohl(*((uint32_t*)(key.data() + i * 4))); |
||||
|
} |
||||
|
|
||||
|
sum = (DELTA * rounds); |
||||
|
for (i = 0; i < rounds; i++) { |
||||
|
z -= ((y << 4) + k[2]) ^ (y + sum) ^ ((y >> 5) + k[3]); |
||||
|
y -= ((z << 4) + k[0]) ^ (z + sum) ^ ((z >> 5) + k[1]); |
||||
|
sum -= DELTA; |
||||
|
} |
||||
|
|
||||
|
*((uint32_t*)dst) = ntohl(y); |
||||
|
*((uint32_t*)(dst + 4)) = ntohl(z); |
||||
|
|
||||
|
//now plain-text is TCP/IP-endian;
|
||||
|
} |
||||
|
|
||||
|
void TeaEncryptECB(uint8_t* src, uint8_t* dst, std::vector<uint8_t> key, size_t rounds = ROUNDS) { |
||||
|
if (key.size() != 16 || (rounds & 1) != 0) |
||||
|
{ |
||||
|
return; |
||||
|
} |
||||
|
uint32_t y, z, sum; |
||||
|
uint32_t k[4]; |
||||
|
int i; |
||||
|
|
||||
|
//now encrypted buf is TCP/IP-endian;
|
||||
|
//TCP/IP network byte order (which is big-endian).
|
||||
|
y = ntohl(*((uint32_t*)src)); |
||||
|
z = ntohl(*((uint32_t*)(src + 4))); |
||||
|
//std::cout << ntohl(0x0a3aea41);
|
||||
|
|
||||
|
for (i = 0; i < 4; i++) { |
||||
|
//key is TCP/IP-endian;
|
||||
|
k[i] = ntohl(*((uint32_t*)(key.data() + i * 4))); |
||||
|
} |
||||
|
|
||||
|
sum = 0; |
||||
|
for (i = 0; i < rounds; i++) { |
||||
|
sum += DELTA; |
||||
|
y += ((z << 4) + k[0]) ^ (z + sum) ^ ((z >> 5) + k[1]); |
||||
|
z += ((y << 4) + k[2]) ^ (y + sum) ^ ((y >> 5) + k[3]); |
||||
|
} |
||||
|
|
||||
|
*((uint32_t*)dst) = ntohl(y); |
||||
|
*((uint32_t*)(dst + 4)) = ntohl(z); |
||||
|
|
||||
|
//now plain-text is TCP/IP-endian;
|
||||
|
} |
||||
|
|
||||
|
/*pKey为16byte*/ |
||||
|
/*
|
||||
|
输入:nInBufLen为需加密的明文部分(Body)长度; |
||||
|
输出:返回为加密后的长度(是8byte的倍数); |
||||
|
*/ |
||||
|
/*TEA加密算法,CBC模式*/ |
||||
|
/*密文格式:PadLen(1byte)+Padding(var,0-7byte)+Salt(2byte)+Body(var byte)+Zero(7byte)*/ |
||||
|
int encryptTencentTeaLen(int nInBufLen) |
||||
|
{ |
||||
|
|
||||
|
int nPadSaltBodyZeroLen/*PadLen(1byte)+Salt+Body+Zero的长度*/; |
||||
|
int nPadlen; |
||||
|
|
||||
|
/*根据Body长度计算PadLen,最小必需长度必需为8byte的整数倍*/ |
||||
|
nPadSaltBodyZeroLen = nInBufLen/*Body长度*/ + 1 + SALT_LEN + ZERO_LEN/*PadLen(1byte)+Salt(2byte)+Zero(7byte)*/; |
||||
|
if ((nPadlen = nPadSaltBodyZeroLen % 8)) /*len=nSaltBodyZeroLen%8*/ |
||||
|
{ |
||||
|
/*模8余0需补0,余1补7,余2补6,...,余7补1*/ |
||||
|
nPadlen = 8 - nPadlen; |
||||
|
} |
||||
|
|
||||
|
return nPadlen; |
||||
|
} |
||||
|
|
||||
|
/*pKey为16byte*/ |
||||
|
/*
|
||||
|
输入:pInBuf为需加密的明文部分(Body),nInBufLen为pInBuf长度; |
||||
|
输出:pOutBuf为密文格式,pOutBufLen为pOutBuf的长度是8byte的倍数; |
||||
|
*/ |
||||
|
/*TEA加密算法,CBC模式*/ |
||||
|
/*密文格式:PadLen(1byte)+Padding(var,0-7byte)+Salt(2byte)+Body(var byte)+Zero(7byte)*/ |
||||
|
bool encryptTencentTea(std::vector<uint8_t> inBuf, std::vector<uint8_t> key, std::vector<uint8_t> &outBuf) |
||||
|
{ |
||||
|
srand(time(0)); |
||||
|
int nPadlen = encryptTencentTeaLen(inBuf.size()); |
||||
|
size_t ivCrypt; |
||||
|
std::vector<uint8_t> srcBuf; |
||||
|
srcBuf.resize(8); |
||||
|
std::vector<uint8_t> ivPlain; |
||||
|
ivPlain.resize(8); |
||||
|
int tmpIdx, i, j; |
||||
|
|
||||
|
/*加密第一块数据(8byte),取前面10byte*/ |
||||
|
srcBuf[0] = (((char)rand()) & 0x0f8)/*最低三位存PadLen,清零*/ | (char)nPadlen; |
||||
|
tmpIdx = 1; /*tmpIdx指向srcBuf下一个位置*/ |
||||
|
|
||||
|
while (nPadlen--) srcBuf[tmpIdx++] = (char)rand(); /*Padding*/ |
||||
|
|
||||
|
/*come here, tmpIdx must <= 8*/ |
||||
|
|
||||
|
for (i = 0; i < 8; i++) ivPlain[i] = 0; |
||||
|
ivCrypt = 0;//ivPlain /*make zero iv*/
|
||||
|
|
||||
|
auto outBufPos = 0; /*init outBufPos*/ |
||||
|
|
||||
|
#define cryptBlock {\ |
||||
|
/*tmpIdx==8*/\ |
||||
|
outBuf.resize(outBuf.size() + 8);\ |
||||
|
for (j = 0; j < 8; j++) /*加密前异或前8个byte的密文(iv_crypt指向的)*/\ |
||||
|
srcBuf[j] ^= outBuf[j + ivCrypt];\ |
||||
|
/*pOutBuffer、pInBuffer均为8byte, pKey为16byte*/\ |
||||
|
/*加密*/\ |
||||
|
TeaEncryptECB(srcBuf.data(), outBuf.data()+outBufPos, key, 16);\ |
||||
|
for (j = 0; j < 8; j++) /*加密后异或前8个byte的明文(iv_plain指向的)*/\ |
||||
|
outBuf[j + outBufPos] ^= ivPlain[j];\ |
||||
|
/*保存当前的iv_plain*/\ |
||||
|
for (j = 0; j < 8; j++) ivPlain[j] = srcBuf[j];\ |
||||
|
/*更新iv_crypt*/\ |
||||
|
tmpIdx = 0;\ |
||||
|
ivCrypt = outBufPos;\ |
||||
|
outBufPos += 8;\ |
||||
|
} |
||||
|
|
||||
|
|
||||
|
for (i = 1; i <= SALT_LEN;) /*Salt(2byte)*/ |
||||
|
{ |
||||
|
if (tmpIdx < 8) |
||||
|
{ |
||||
|
srcBuf[tmpIdx++] = (char)rand(); |
||||
|
i++; /*i inc in here*/ |
||||
|
} |
||||
|
if (tmpIdx == 8) |
||||
|
{ |
||||
|
cryptBlock |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/*tmpIdx指向srcBuf下一个位置*/ |
||||
|
|
||||
|
auto inBufPos = 0; |
||||
|
while (inBufPos < inBuf.size()) |
||||
|
{ |
||||
|
if (tmpIdx < 8) |
||||
|
{ |
||||
|
srcBuf[tmpIdx++] = inBuf[inBufPos]; |
||||
|
inBufPos++; |
||||
|
} |
||||
|
if (tmpIdx == 8) |
||||
|
{ |
||||
|
cryptBlock |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
/*tmpIdx指向srcBuf下一个位置*/ |
||||
|
|
||||
|
for (i = 1; i <= ZERO_LEN;) |
||||
|
{ |
||||
|
if (tmpIdx < 8) |
||||
|
{ |
||||
|
srcBuf[tmpIdx++] = 0; |
||||
|
i++; //i inc in here
|
||||
|
} |
||||
|
if (tmpIdx == 8) |
||||
|
{ |
||||
|
cryptBlock |
||||
|
} |
||||
|
} |
||||
|
return true; |
||||
|
#undef cryptBlock |
||||
|
} |
||||
|
|
||||
|
bool decryptTencentTea(std::vector<uint8_t> inBuf, std::vector<uint8_t> key, std::vector<uint8_t> &out) { |
||||
|
if (inBuf.size() % 8 != 0) { |
||||
|
return false; |
||||
|
//inBuf size not a multiple of the block size
|
||||
|
} |
||||
|
if (inBuf.size() < 16) { |
||||
|
return false; |
||||
|
//inBuf size too small
|
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> tmpBuf; |
||||
|
tmpBuf.resize(8); |
||||
|
|
||||
|
TeaDecryptECB(inBuf.data(), tmpBuf.data(), key, 16); |
||||
|
|
||||
|
auto nPadLen = tmpBuf[0] & 0x7; //只要最低三位
|
||||
|
/*密文格式:PadLen(1byte)+Padding(var,0-7byte)+Salt(2byte)+Body(var byte)+Zero(7byte)*/ |
||||
|
auto outLen = inBuf.size() - 1 /*PadLen*/ - nPadLen - SALT_LEN - ZERO_LEN; |
||||
|
std::vector<uint8_t> outBuf; |
||||
|
outBuf.resize(outLen); |
||||
|
|
||||
|
std::vector<uint8_t> ivPrev; |
||||
|
ivPrev.resize(8); |
||||
|
std::vector<uint8_t> ivCur; |
||||
|
ivCur.resize(8); |
||||
|
for (size_t i = 0; i < 8; i++) |
||||
|
{ |
||||
|
ivCur[i] = inBuf[i]; // init iv
|
||||
|
} |
||||
|
auto inBufPos = 8; |
||||
|
|
||||
|
// 跳过 Padding Len 和 Padding
|
||||
|
auto tmpIdx = 1 + nPadLen; |
||||
|
|
||||
|
// CBC IV 处理
|
||||
|
#define cryptBlock {\ |
||||
|
ivPrev = ivCur;\ |
||||
|
for (size_t k = inBufPos; k < inBufPos + 8; k++)\ |
||||
|
{\ |
||||
|
ivCur[k - inBufPos] = inBuf[k];\ |
||||
|
}\ |
||||
|
for (size_t j = 0; j < 8; j++) {\ |
||||
|
tmpBuf[j] ^= ivCur[j];\ |
||||
|
}\ |
||||
|
TeaDecryptECB(tmpBuf.data(), tmpBuf.data(), key, 16);\ |
||||
|
inBufPos += 8;\ |
||||
|
tmpIdx = 0;\ |
||||
|
} |
||||
|
|
||||
|
// 跳过 Salt
|
||||
|
for (size_t i = 1; i <= SALT_LEN; ) { |
||||
|
if (tmpIdx < 8) { |
||||
|
tmpIdx++; |
||||
|
i++; |
||||
|
} |
||||
|
else { |
||||
|
cryptBlock |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
// 还原明文
|
||||
|
auto outBufPos = 0; |
||||
|
while (outBufPos < outLen) { |
||||
|
if (tmpIdx < 8) { |
||||
|
outBuf[outBufPos] = tmpBuf[tmpIdx] ^ ivPrev[tmpIdx]; |
||||
|
outBufPos++; |
||||
|
tmpIdx++; |
||||
|
} |
||||
|
else { |
||||
|
cryptBlock |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
// 校验Zero
|
||||
|
for (size_t i = 1; i <= ZERO_LEN; i++) { |
||||
|
if (tmpBuf[i] != ivPrev[i]) { |
||||
|
return false; |
||||
|
//zero check failed
|
||||
|
} |
||||
|
} |
||||
|
out = outBuf; |
||||
|
return true; |
||||
|
#undef cryptBlock |
||||
|
} |
||||
|
|
||||
|
#endif //QQMUSIC_CPP_TENCENTTEA_HPP
|
||||
@ -0,0 +1,207 @@ |
|||||
|
//
|
||||
|
// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
|
||||
|
//
|
||||
|
// Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||||
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
||||
|
//
|
||||
|
// Official repository: https://github.com/boostorg/beast
|
||||
|
//
|
||||
|
|
||||
|
/*
|
||||
|
Portions from http://www.adp-gmbh.ch/cpp/common/base64.html
|
||||
|
Copyright notice: |
||||
|
|
||||
|
base64.cpp and base64.h |
||||
|
|
||||
|
Copyright (C) 2004-2008 Rene Nyffenegger |
||||
|
|
||||
|
This source code is provided 'as-is', without any express or implied |
||||
|
warranty. In no event will the author be held liable for any damages |
||||
|
arising from the use of this software. |
||||
|
|
||||
|
Permission is granted to anyone to use this software for any purpose, |
||||
|
including commercial applications, and to alter it and redistribute it |
||||
|
freely, subject to the following restrictions: |
||||
|
|
||||
|
1. The origin of this source code must not be misrepresented; you must not |
||||
|
claim that you wrote the original source code. If you use this source code |
||||
|
in a product, an acknowledgment in the product documentation would be |
||||
|
appreciated but is not required. |
||||
|
|
||||
|
2. Altered source versions must be plainly marked as such, and must not be |
||||
|
misrepresented as being the original source code. |
||||
|
|
||||
|
3. This notice may not be removed or altered from any source distribution. |
||||
|
|
||||
|
Rene Nyffenegger rene.nyffenegger@adp-gmbh.ch |
||||
|
*/ |
||||
|
|
||||
|
#ifndef BASE64_HPP |
||||
|
#define BASE64_HPP |
||||
|
|
||||
|
#include <cctype> |
||||
|
#include <string> |
||||
|
#include <utility> |
||||
|
|
||||
|
namespace base64 { |
||||
|
|
||||
|
/// Returns max chars needed to encode a base64 string
|
||||
|
std::size_t constexpr |
||||
|
encoded_size(std::size_t n) |
||||
|
{ |
||||
|
return 4 * ((n + 2) / 3); |
||||
|
} |
||||
|
|
||||
|
/// Returns max bytes needed to decode a base64 string
|
||||
|
inline |
||||
|
std::size_t constexpr |
||||
|
decoded_size(std::size_t n) |
||||
|
{ |
||||
|
return n / 4 * 3; // requires n&3==0, smaller
|
||||
|
} |
||||
|
|
||||
|
char const* |
||||
|
get_alphabet() |
||||
|
{ |
||||
|
static char constexpr tab[] = { |
||||
|
"ABCDEFGHIJKLMNOP" |
||||
|
"QRSTUVWXYZabcdef" |
||||
|
"ghijklmnopqrstuv" |
||||
|
"wxyz0123456789+/" |
||||
|
}; |
||||
|
return &tab[0]; |
||||
|
} |
||||
|
|
||||
|
signed char const* |
||||
|
get_inverse() |
||||
|
{ |
||||
|
static signed char constexpr tab[] = { |
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0-15
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 16-31
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, // 32-47
|
||||
|
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, // 48-63
|
||||
|
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, // 64-79
|
||||
|
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, // 80-95
|
||||
|
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, // 96-111
|
||||
|
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, // 112-127
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 128-143
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 144-159
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 160-175
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 176-191
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 192-207
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 208-223
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 224-239
|
||||
|
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 // 240-255
|
||||
|
}; |
||||
|
return &tab[0]; |
||||
|
} |
||||
|
|
||||
|
/** Encode a series of octets as a padded, base64 string.
|
||||
|
|
||||
|
The resulting string will not be null terminated. |
||||
|
|
||||
|
@par Requires |
||||
|
|
||||
|
The memory pointed to by `out` points to valid memory |
||||
|
of at least `encoded_size(len)` bytes. |
||||
|
|
||||
|
@return The number of characters written to `out`. This |
||||
|
will exclude any null termination. |
||||
|
*/ |
||||
|
std::size_t |
||||
|
encode(void* dest, void const* src, std::size_t len) |
||||
|
{ |
||||
|
char* out = static_cast<char*>(dest); |
||||
|
char const* in = static_cast<char const*>(src); |
||||
|
auto const tab = base64::get_alphabet(); |
||||
|
|
||||
|
for (auto n = len / 3; n--;) |
||||
|
{ |
||||
|
*out++ = tab[(in[0] & 0xfc) >> 2]; |
||||
|
*out++ = tab[((in[0] & 0x03) << 4) + ((in[1] & 0xf0) >> 4)]; |
||||
|
*out++ = tab[((in[2] & 0xc0) >> 6) + ((in[1] & 0x0f) << 2)]; |
||||
|
*out++ = tab[in[2] & 0x3f]; |
||||
|
in += 3; |
||||
|
} |
||||
|
|
||||
|
switch (len % 3) |
||||
|
{ |
||||
|
case 2: |
||||
|
*out++ = tab[(in[0] & 0xfc) >> 2]; |
||||
|
*out++ = tab[((in[0] & 0x03) << 4) + ((in[1] & 0xf0) >> 4)]; |
||||
|
*out++ = tab[(in[1] & 0x0f) << 2]; |
||||
|
*out++ = '='; |
||||
|
break; |
||||
|
|
||||
|
case 1: |
||||
|
*out++ = tab[(in[0] & 0xfc) >> 2]; |
||||
|
*out++ = tab[((in[0] & 0x03) << 4)]; |
||||
|
*out++ = '='; |
||||
|
*out++ = '='; |
||||
|
break; |
||||
|
|
||||
|
case 0: |
||||
|
break; |
||||
|
} |
||||
|
|
||||
|
return out - static_cast<char*>(dest); |
||||
|
} |
||||
|
|
||||
|
/** Decode a padded base64 string into a series of octets.
|
||||
|
|
||||
|
@par Requires |
||||
|
|
||||
|
The memory pointed to by `out` points to valid memory |
||||
|
of at least `decoded_size(len)` bytes. |
||||
|
|
||||
|
@return The number of octets written to `out`, and |
||||
|
the number of characters read from the input string, |
||||
|
expressed as a pair. |
||||
|
*/ |
||||
|
std::pair<std::size_t, std::size_t> |
||||
|
decode(void* dest, char const* src, std::size_t len) |
||||
|
{ |
||||
|
char* out = static_cast<char*>(dest); |
||||
|
auto in = reinterpret_cast<unsigned char const*>(src); |
||||
|
unsigned char c3[3], c4[4]; |
||||
|
int i = 0; |
||||
|
int j = 0; |
||||
|
|
||||
|
auto const inverse = base64::get_inverse(); |
||||
|
|
||||
|
while (len-- && *in != '=') |
||||
|
{ |
||||
|
auto const v = inverse[*in]; |
||||
|
if (v == -1) |
||||
|
break; |
||||
|
++in; |
||||
|
c4[i] = v; |
||||
|
if (++i == 4) |
||||
|
{ |
||||
|
c3[0] = (c4[0] << 2) + ((c4[1] & 0x30) >> 4); |
||||
|
c3[1] = ((c4[1] & 0xf) << 4) + ((c4[2] & 0x3c) >> 2); |
||||
|
c3[2] = ((c4[2] & 0x3) << 6) + c4[3]; |
||||
|
|
||||
|
for (i = 0; i < 3; i++) |
||||
|
*out++ = c3[i]; |
||||
|
i = 0; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
if (i) |
||||
|
{ |
||||
|
c3[0] = (c4[0] << 2) + ((c4[1] & 0x30) >> 4); |
||||
|
c3[1] = ((c4[1] & 0xf) << 4) + ((c4[2] & 0x3c) >> 2); |
||||
|
c3[2] = ((c4[2] & 0x3) << 6) + c4[3]; |
||||
|
|
||||
|
for (j = 0; j < i - 1; j++) |
||||
|
*out++ = c3[j]; |
||||
|
} |
||||
|
|
||||
|
return { out - static_cast<char*>(dest), |
||||
|
in - reinterpret_cast<unsigned char const*>(src) }; |
||||
|
} |
||||
|
|
||||
|
} // base64
|
||||
|
|
||||
|
#endif |
||||
@ -0,0 +1,41 @@ |
|||||
|
#!/usr/bin/env bash |
||||
|
|
||||
|
set -e |
||||
|
|
||||
|
pushd "$(realpath "$(dirname "$0")")" |
||||
|
|
||||
|
CURR_DIR="${PWD}" |
||||
|
|
||||
|
BUILD_TYPE="$1" |
||||
|
if [ -z "$BUILD_TYPE" ]; then |
||||
|
BUILD_TYPE=Release |
||||
|
fi |
||||
|
|
||||
|
mkdir -p build/wasm |
||||
|
if [ ! -d build/emsdk ]; then |
||||
|
git clone https://github.com/emscripten-core/emsdk.git build/emsdk |
||||
|
fi |
||||
|
|
||||
|
pushd build/emsdk |
||||
|
#git pull |
||||
|
./emsdk install 3.0.0 |
||||
|
./emsdk activate 3.0.0 |
||||
|
source ./emsdk_env.sh |
||||
|
popd # build/emsdk |
||||
|
|
||||
|
pushd build/wasm |
||||
|
emcmake cmake -DCMAKE_BUILD_TYPE="$BUILD_TYPE" ../.. |
||||
|
make -j |
||||
|
TARGET_FILES=" |
||||
|
QmcLegacy.js |
||||
|
QmcWasm.js |
||||
|
QmcWasm.wasm |
||||
|
QmcWasmBundle.js |
||||
|
" |
||||
|
|
||||
|
#mkdir -p "${CURR_DIR}/npm" |
||||
|
#cp $TARGET_FILES "${CURR_DIR}/npm/" |
||||
|
cp $TARGET_FILES "${CURR_DIR}/" |
||||
|
popd # build/wasm |
||||
|
|
||||
|
popd |
||||
@ -0,0 +1,230 @@ |
|||||
|
#include <string.h> |
||||
|
#include <cmath> |
||||
|
#include <vector> |
||||
|
#include <arpa/inet.h> |
||||
|
#include "qmc_key.hpp" |
||||
|
#include "qmc_cipher.hpp" |
||||
|
|
||||
|
class QmcDecode { |
||||
|
private: |
||||
|
std::vector<uint8_t> blobData; |
||||
|
|
||||
|
std::vector<uint8_t> rawKeyBuf; |
||||
|
std::string cipherType = ""; |
||||
|
|
||||
|
size_t dataOffset = 0; |
||||
|
size_t keySize = 0; |
||||
|
int mediaVer = 0; |
||||
|
|
||||
|
std::string checkType(std::string fn) { |
||||
|
if (fn.find(".qmc") < fn.size() || fn.find(".m") < fn.size()) |
||||
|
{ |
||||
|
std::string buf_tag = ""; |
||||
|
for (int i = 4; i > 0; --i) |
||||
|
{ |
||||
|
buf_tag += *((char*)blobData.data() + blobData.size() - i); |
||||
|
} |
||||
|
if (buf_tag == "QTag") |
||||
|
{ |
||||
|
keySize = ntohl(*(uint32_t*)(blobData.data() + blobData.size() - 8)); |
||||
|
return "QTag"; |
||||
|
} |
||||
|
else if (buf_tag == "STag") |
||||
|
{ |
||||
|
return "STag"; |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
keySize = (*(uint32_t*)(blobData.data() + blobData.size() - 4)); |
||||
|
if (keySize < 0x400) |
||||
|
{ |
||||
|
return "Map/RC4"; |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
keySize = 0; |
||||
|
return "Static"; |
||||
|
} |
||||
|
} |
||||
|
} |
||||
|
else if (fn.find(".cache") < fn.size()) |
||||
|
{ |
||||
|
return "cache"; |
||||
|
} |
||||
|
else if (fn.find(".tm") < fn.size()) |
||||
|
{ |
||||
|
return "ios"; |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return "invalid"; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
bool parseRawKeyQTag() { |
||||
|
std::string ketStr = ""; |
||||
|
std::string::size_type index = 0; |
||||
|
ketStr.append((char*)rawKeyBuf.data(), rawKeyBuf.size()); |
||||
|
index = ketStr.find(",", 0); |
||||
|
if (index != std::string::npos) |
||||
|
{ |
||||
|
rawKeyBuf.resize(index); |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return false; |
||||
|
} |
||||
|
ketStr = ketStr.substr(index + 1); |
||||
|
index = ketStr.find(",", 0); |
||||
|
if (index != std::string::npos) |
||||
|
{ |
||||
|
this->songId = ketStr.substr(0, index); |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return false; |
||||
|
} |
||||
|
ketStr = ketStr.substr(index + 1); |
||||
|
index = ketStr.find(",", 0); |
||||
|
if (index == std::string::npos) |
||||
|
{ |
||||
|
this->mediaVer = std::stoi(ketStr); |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return false; |
||||
|
} |
||||
|
return true; |
||||
|
} |
||||
|
|
||||
|
bool readRawKey(size_t tailSize) { |
||||
|
// get raw key data length
|
||||
|
rawKeyBuf.resize(keySize); |
||||
|
if (rawKeyBuf.size() != keySize) { |
||||
|
return false; |
||||
|
} |
||||
|
for (size_t i = 0; i < keySize; i++) |
||||
|
{ |
||||
|
rawKeyBuf[i] = blobData[i + blobData.size() - (tailSize + keySize)]; |
||||
|
} |
||||
|
return true; |
||||
|
} |
||||
|
|
||||
|
void DecodeStatic(); |
||||
|
|
||||
|
void DecodeMapRC4(); |
||||
|
|
||||
|
void DecodeCache(); |
||||
|
|
||||
|
void DecodeTm(); |
||||
|
|
||||
|
public: |
||||
|
bool SetBlob(uint8_t* blob, size_t blobSize) { |
||||
|
blobData.resize(blobSize); |
||||
|
if (blobData.size() != blobSize) { |
||||
|
return false; |
||||
|
} |
||||
|
memcpy(blobData.data(), blob, blobSize); |
||||
|
return true; |
||||
|
} |
||||
|
|
||||
|
int PreDecode(std::string ext) { |
||||
|
cipherType = checkType(ext); |
||||
|
size_t tailSize = 0; |
||||
|
if (cipherType == "QTag") { |
||||
|
tailSize = 8; |
||||
|
} |
||||
|
else if (cipherType == "Map/RC4") { |
||||
|
tailSize = 4; |
||||
|
} |
||||
|
if (keySize > 0) { |
||||
|
if (!readRawKey(tailSize)) { |
||||
|
error = "cannot read embedded key from file"; |
||||
|
return -1; |
||||
|
} |
||||
|
if (tailSize == 8) { |
||||
|
cipherType = "Map/RC4"; |
||||
|
if (!parseRawKeyQTag()) { |
||||
|
error = "cannot parse embedded key"; |
||||
|
return -1; |
||||
|
} |
||||
|
} |
||||
|
std::vector<uint8_t> tmp; |
||||
|
if (!QmcDecryptKey(rawKeyBuf, tmp)) { |
||||
|
error = "cannot decrypt embedded key"; |
||||
|
return -1; |
||||
|
} |
||||
|
rawKeyBuf = tmp; |
||||
|
} |
||||
|
if (cipherType == "invalid") { |
||||
|
error = "file is invalid or not supported(Please downgrade your app.)"; |
||||
|
return -1; |
||||
|
} |
||||
|
return keySize + tailSize; |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> Decode(size_t offset); |
||||
|
|
||||
|
std::string songId = ""; |
||||
|
std::string error = ""; |
||||
|
}; |
||||
|
|
||||
|
void QmcDecode::DecodeStatic() |
||||
|
{ |
||||
|
QmcStaticCipher sc; |
||||
|
sc.proc(blobData, dataOffset); |
||||
|
} |
||||
|
|
||||
|
void QmcDecode::DecodeMapRC4() { |
||||
|
if (rawKeyBuf.size() > 300) |
||||
|
{ |
||||
|
QmcRC4Cipher c(rawKeyBuf, 2); |
||||
|
c.proc(blobData, dataOffset); |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
QmcMapCipher c(rawKeyBuf, 2); |
||||
|
c.proc(blobData, dataOffset); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
void QmcDecode::DecodeCache() |
||||
|
{ |
||||
|
for (size_t i = 0; i < blobData.size(); i++) { |
||||
|
blobData[i] ^= 0xf4; |
||||
|
blobData[i] = ((blobData[i] & 0b00111111) << 2) | (blobData[i] >> 6); // rol 2
|
||||
|
} |
||||
|
} |
||||
|
|
||||
|
void QmcDecode::DecodeTm() |
||||
|
{ |
||||
|
uint8_t const TM_HEADER[] = { 0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x79, 0x70 }; |
||||
|
for (size_t cur = dataOffset, i = 0; cur < 8 && i < blobData.size(); ++cur, ++i) { |
||||
|
blobData[i] = TM_HEADER[dataOffset]; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> QmcDecode::Decode(size_t offset) |
||||
|
{ |
||||
|
dataOffset = offset; |
||||
|
if (cipherType == "Map/RC4") |
||||
|
{ |
||||
|
DecodeMapRC4(); |
||||
|
} |
||||
|
else if (cipherType == "Static") |
||||
|
{ |
||||
|
DecodeStatic(); |
||||
|
} |
||||
|
else if (cipherType == "cache") |
||||
|
{ |
||||
|
DecodeCache(); |
||||
|
} |
||||
|
else if (cipherType == "ios") |
||||
|
{ |
||||
|
DecodeTm(); |
||||
|
} |
||||
|
else { |
||||
|
error = "File is invalid or encryption type is not supported."; |
||||
|
} |
||||
|
return blobData; |
||||
|
} |
||||
@ -0,0 +1,290 @@ |
|||||
|
#include <cstdint> |
||||
|
#include <vector> |
||||
|
class QmcStaticCipher { |
||||
|
private: |
||||
|
uint8_t staticCipherBox[256] = { |
||||
|
0x77, 0x48, 0x32, 0x73, 0xDE, 0xF2, 0xC0, 0xC8, //0x00
|
||||
|
0x95, 0xEC, 0x30, 0xB2, 0x51, 0xC3, 0xE1, 0xA0, //0x08
|
||||
|
0x9E, 0xE6, 0x9D, 0xCF, 0xFA, 0x7F, 0x14, 0xD1, //0x10
|
||||
|
0xCE, 0xB8, 0xDC, 0xC3, 0x4A, 0x67, 0x93, 0xD6, //0x18
|
||||
|
0x28, 0xC2, 0x91, 0x70, 0xCA, 0x8D, 0xA2, 0xA4, //0x20
|
||||
|
0xF0, 0x08, 0x61, 0x90, 0x7E, 0x6F, 0xA2, 0xE0, //0x28
|
||||
|
0xEB, 0xAE, 0x3E, 0xB6, 0x67, 0xC7, 0x92, 0xF4, //0x30
|
||||
|
0x91, 0xB5, 0xF6, 0x6C, 0x5E, 0x84, 0x40, 0xF7, //0x38
|
||||
|
0xF3, 0x1B, 0x02, 0x7F, 0xD5, 0xAB, 0x41, 0x89, //0x40
|
||||
|
0x28, 0xF4, 0x25, 0xCC, 0x52, 0x11, 0xAD, 0x43, //0x48
|
||||
|
0x68, 0xA6, 0x41, 0x8B, 0x84, 0xB5, 0xFF, 0x2C, //0x50
|
||||
|
0x92, 0x4A, 0x26, 0xD8, 0x47, 0x6A, 0x7C, 0x95, //0x58
|
||||
|
0x61, 0xCC, 0xE6, 0xCB, 0xBB, 0x3F, 0x47, 0x58, //0x60
|
||||
|
0x89, 0x75, 0xC3, 0x75, 0xA1, 0xD9, 0xAF, 0xCC, //0x68
|
||||
|
0x08, 0x73, 0x17, 0xDC, 0xAA, 0x9A, 0xA2, 0x16, //0x70
|
||||
|
0x41, 0xD8, 0xA2, 0x06, 0xC6, 0x8B, 0xFC, 0x66, //0x78
|
||||
|
0x34, 0x9F, 0xCF, 0x18, 0x23, 0xA0, 0x0A, 0x74, //0x80
|
||||
|
0xE7, 0x2B, 0x27, 0x70, 0x92, 0xE9, 0xAF, 0x37, //0x88
|
||||
|
0xE6, 0x8C, 0xA7, 0xBC, 0x62, 0x65, 0x9C, 0xC2, //0x90
|
||||
|
0x08, 0xC9, 0x88, 0xB3, 0xF3, 0x43, 0xAC, 0x74, //0x98
|
||||
|
0x2C, 0x0F, 0xD4, 0xAF, 0xA1, 0xC3, 0x01, 0x64, //0xA0
|
||||
|
0x95, 0x4E, 0x48, 0x9F, 0xF4, 0x35, 0x78, 0x95, //0xA8
|
||||
|
0x7A, 0x39, 0xD6, 0x6A, 0xA0, 0x6D, 0x40, 0xE8, //0xB0
|
||||
|
0x4F, 0xA8, 0xEF, 0x11, 0x1D, 0xF3, 0x1B, 0x3F, //0xB8
|
||||
|
0x3F, 0x07, 0xDD, 0x6F, 0x5B, 0x19, 0x30, 0x19, //0xC0
|
||||
|
0xFB, 0xEF, 0x0E, 0x37, 0xF0, 0x0E, 0xCD, 0x16, //0xC8
|
||||
|
0x49, 0xFE, 0x53, 0x47, 0x13, 0x1A, 0xBD, 0xA4, //0xD0
|
||||
|
0xF1, 0x40, 0x19, 0x60, 0x0E, 0xED, 0x68, 0x09, //0xD8
|
||||
|
0x06, 0x5F, 0x4D, 0xCF, 0x3D, 0x1A, 0xFE, 0x20, //0xE0
|
||||
|
0x77, 0xE4, 0xD9, 0xDA, 0xF9, 0xA4, 0x2B, 0x76, //0xE8
|
||||
|
0x1C, 0x71, 0xDB, 0x00, 0xBC, 0xFD, 0x0C, 0x6C, //0xF0
|
||||
|
0xA5, 0x47, 0xF7, 0xF6, 0x00, 0x79, 0x4A, 0x11 //0xF8
|
||||
|
}; |
||||
|
|
||||
|
uint8_t getMask(size_t offset) { |
||||
|
if (offset > 0x7fff) offset %= 0x7fff; |
||||
|
return staticCipherBox[(offset * offset + 27) & 0xff]; |
||||
|
} |
||||
|
|
||||
|
public: |
||||
|
void proc(std::vector<uint8_t>& buf, size_t offset) { |
||||
|
for (size_t i = 0; i < buf.size(); i++) { |
||||
|
buf[i] ^= getMask(offset + i); |
||||
|
} |
||||
|
} |
||||
|
}; |
||||
|
|
||||
|
class QmcMapCipher { |
||||
|
private: |
||||
|
std::vector<uint8_t> key; |
||||
|
|
||||
|
uint8_t rotate(uint8_t value, size_t bits) { |
||||
|
auto rotate = (bits + 4) % 8; |
||||
|
auto left = value << rotate; |
||||
|
auto right = value >> rotate; |
||||
|
return (left | right) & 0xff; |
||||
|
} |
||||
|
|
||||
|
uint8_t getMask(size_t offset) { |
||||
|
if (offset > 0x7fff) offset %= 0x7fff; |
||||
|
|
||||
|
const auto idx = (offset * offset + 71214) % key.size(); |
||||
|
return rotate(key[idx], idx & 0x7); |
||||
|
} |
||||
|
|
||||
|
public: |
||||
|
QmcMapCipher(std::vector<uint8_t> &argKey, short operation) { |
||||
|
if (operation == 2) |
||||
|
{ |
||||
|
if (argKey.size() == 0) { |
||||
|
return; |
||||
|
} |
||||
|
} |
||||
|
else if (operation == 1) |
||||
|
{ |
||||
|
const char WordList[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
||||
|
srand(time(0)); |
||||
|
uint32_t number = 0; |
||||
|
while (number > 300 || number == 0) |
||||
|
{ |
||||
|
number = rand(); |
||||
|
} |
||||
|
argKey.resize(number); |
||||
|
for (int i = 0; i < argKey.size(); i++) { |
||||
|
number = rand(); |
||||
|
argKey[i] = WordList[number % 62]; |
||||
|
} |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return; |
||||
|
} |
||||
|
|
||||
|
key = argKey; |
||||
|
} |
||||
|
|
||||
|
void proc(std::vector<uint8_t>& buf, size_t offset) { |
||||
|
for (size_t i = 0; i < buf.size(); i++) { |
||||
|
buf[i] ^= getMask(offset + i); |
||||
|
} |
||||
|
} |
||||
|
}; |
||||
|
|
||||
|
class QmcRC4Cipher { |
||||
|
public: |
||||
|
void proc(std::vector<uint8_t>& buf, size_t offset) { |
||||
|
// Macro: common code after each process
|
||||
|
#define postProcess(len) \ |
||||
|
{ \ |
||||
|
toProcess -= len; \ |
||||
|
processed += len; \ |
||||
|
offset += len; \ |
||||
|
/* no more data */ \ |
||||
|
if (toProcess == 0) { \ |
||||
|
return; \ |
||||
|
} \ |
||||
|
} |
||||
|
|
||||
|
size_t toProcess = buf.size(); |
||||
|
size_t processed = 0; |
||||
|
std::vector<uint8_t> tmpbuf; |
||||
|
|
||||
|
// 前 128 字节使用不同的解密方案
|
||||
|
if (offset < FIRST_SEGMENT_SIZE) { |
||||
|
size_t len_segment = std::min(FIRST_SEGMENT_SIZE - offset, buf.size()); |
||||
|
tmpbuf.resize(len_segment); |
||||
|
for (size_t i = 0; i < len_segment; i++) |
||||
|
{ |
||||
|
tmpbuf[i] = buf[processed + i]; |
||||
|
} |
||||
|
procFirstSegment(tmpbuf, offset); |
||||
|
for (size_t i = 0; i < len_segment; i++) |
||||
|
{ |
||||
|
buf[processed + i] = tmpbuf[i]; |
||||
|
} |
||||
|
postProcess(len_segment); |
||||
|
} |
||||
|
|
||||
|
|
||||
|
// 区块对齐
|
||||
|
if (offset % SEGMENT_SIZE != 0) { |
||||
|
size_t len_segment = std::min(SEGMENT_SIZE - (offset % SEGMENT_SIZE), toProcess); |
||||
|
tmpbuf.resize(len_segment); |
||||
|
for (size_t i = 0; i < len_segment; i++) |
||||
|
{ |
||||
|
tmpbuf[i] = buf[processed + i]; |
||||
|
} |
||||
|
procASegment(tmpbuf, offset); |
||||
|
for (size_t i = 0; i < len_segment; i++) |
||||
|
{ |
||||
|
buf[processed + i] = tmpbuf[i]; |
||||
|
} |
||||
|
postProcess(len_segment); |
||||
|
} |
||||
|
|
||||
|
// 对每个区块逐一进行解密
|
||||
|
while (toProcess > SEGMENT_SIZE) { |
||||
|
tmpbuf.resize(SEGMENT_SIZE); |
||||
|
for (size_t i = 0; i < SEGMENT_SIZE; i++) |
||||
|
{ |
||||
|
tmpbuf[i] = buf[processed + i]; |
||||
|
} |
||||
|
procASegment(tmpbuf, offset); |
||||
|
for (size_t i = 0; i < SEGMENT_SIZE; i++) |
||||
|
{ |
||||
|
buf[processed + i] = tmpbuf[i]; |
||||
|
} |
||||
|
postProcess(SEGMENT_SIZE); |
||||
|
} |
||||
|
|
||||
|
if (toProcess > 0) { |
||||
|
tmpbuf.resize(toProcess); |
||||
|
for (size_t i = 0; i < toProcess; i++) |
||||
|
{ |
||||
|
tmpbuf[i] = buf[processed + i]; |
||||
|
} |
||||
|
procASegment(tmpbuf, offset); |
||||
|
for (size_t i = 0; i < toProcess; i++) |
||||
|
{ |
||||
|
buf[processed + i] = tmpbuf[i]; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
#undef postProcess |
||||
|
} |
||||
|
|
||||
|
QmcRC4Cipher(std::vector<uint8_t>& argKey, short operation) { |
||||
|
if (operation == 2) |
||||
|
{ |
||||
|
if (argKey.size() == 0) { |
||||
|
return; |
||||
|
} |
||||
|
} |
||||
|
else if (operation == 1) |
||||
|
{ |
||||
|
const char WordList[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
||||
|
srand(time(0)); |
||||
|
uint32_t number = 0; |
||||
|
while (number <= 300 || number >= 512) |
||||
|
{ |
||||
|
number = rand(); |
||||
|
} |
||||
|
argKey.resize(number); |
||||
|
for (int i = 0; i < argKey.size(); i++) { |
||||
|
number = rand(); |
||||
|
argKey[i] = WordList[number % 62]; |
||||
|
} |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return; |
||||
|
} |
||||
|
|
||||
|
key = argKey; |
||||
|
|
||||
|
// init seed box
|
||||
|
S.resize(key.size()); |
||||
|
for (size_t i = 0; i < key.size(); ++i) { |
||||
|
S[i] = i & 0xff; |
||||
|
} |
||||
|
size_t j = 0; |
||||
|
for (size_t i = 0; i < key.size(); ++i) { |
||||
|
j = (S[i] + j + key[i % key.size()]) % key.size(); |
||||
|
std::swap(S[i], S[j]); |
||||
|
} |
||||
|
|
||||
|
// init hash base
|
||||
|
hash = 1; |
||||
|
for (size_t i = 0; i < key.size(); i++) { |
||||
|
uint8_t value = key[i]; |
||||
|
|
||||
|
// ignore if key char is '\x00'
|
||||
|
if (!value) continue; |
||||
|
|
||||
|
auto next_hash = hash * value; |
||||
|
if (next_hash == 0 || next_hash <= hash) break; |
||||
|
|
||||
|
hash = next_hash; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
private: |
||||
|
const size_t FIRST_SEGMENT_SIZE = 0x80; |
||||
|
const size_t SEGMENT_SIZE = 5120; |
||||
|
|
||||
|
std::vector<uint8_t> S; |
||||
|
std::vector<uint8_t> key; |
||||
|
uint32_t hash = 1; |
||||
|
|
||||
|
void procFirstSegment(std::vector<uint8_t>& buf, size_t offset) { |
||||
|
for (size_t i = 0; i < buf.size(); i++) { |
||||
|
buf[i] ^= key[getSegmentKey(offset + i)]; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
void procASegment(std::vector<uint8_t>& buf, size_t offset) { |
||||
|
// Initialise a new seed box
|
||||
|
std::vector<uint8_t> nS; |
||||
|
nS = S; |
||||
|
|
||||
|
// Calculate the number of bytes to skip.
|
||||
|
// The initial "key" derived from segment id, plus the current offset.
|
||||
|
int64_t skipLen = (offset % SEGMENT_SIZE) + getSegmentKey(int(offset / SEGMENT_SIZE)); |
||||
|
|
||||
|
// decrypt the block
|
||||
|
size_t j = 0; |
||||
|
size_t k = 0; |
||||
|
int i = -skipLen; |
||||
|
for (; i < (int)buf.size(); i++) { |
||||
|
j = (j + 1) % key.size(); |
||||
|
k = (nS[j] + k) % key.size(); |
||||
|
std::swap(nS[k], nS[j]); |
||||
|
|
||||
|
if (i >= 0) { |
||||
|
buf[i] ^= nS[(nS[j] + nS[k]) % key.size()]; |
||||
|
} |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
uint64_t getSegmentKey(int id) { |
||||
|
auto seed = key[id % key.size()]; |
||||
|
uint64_t idx = ((double)hash / ((id + 1) * seed)) * 100.0; |
||||
|
return idx % key.size(); |
||||
|
} |
||||
|
}; |
||||
@ -0,0 +1,217 @@ |
|||||
|
#include"TencentTea.hpp" |
||||
|
#include "base64.hpp" |
||||
|
|
||||
|
void simpleMakeKey(uint8_t salt, int length, std::vector<uint8_t> &key_buf) { |
||||
|
for (size_t i = 0; i < length; ++i) { |
||||
|
double tmp = tan((float)salt + (double)i * 0.1); |
||||
|
key_buf[i] = 0xFF & (uint8_t)(fabs(tmp) * 100.0); |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> v2KeyPrefix = { 0x51, 0x51, 0x4D, 0x75, 0x73, 0x69, 0x63, 0x20, 0x45, 0x6E, 0x63, 0x56, 0x32, 0x2C, 0x4B, 0x65, 0x79, 0x3A }; |
||||
|
|
||||
|
bool decryptV2Key(std::vector<uint8_t> key, std::vector<uint8_t>& outVec) |
||||
|
{ |
||||
|
if (v2KeyPrefix.size() > key.size()) |
||||
|
{ |
||||
|
return true; |
||||
|
} |
||||
|
for (size_t i = 0; i < v2KeyPrefix.size(); i++) |
||||
|
{ |
||||
|
if (key[i] != v2KeyPrefix[i]) |
||||
|
{ |
||||
|
return true; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> mixKey1 = { 0x33, 0x38, 0x36, 0x5A, 0x4A, 0x59, 0x21, 0x40, 0x23, 0x2A, 0x24, 0x25, 0x5E, 0x26, 0x29, 0x28 }; |
||||
|
std::vector<uint8_t> mixKey2 = { 0x2A, 0x2A, 0x23, 0x21, 0x28, 0x23, 0x24, 0x25, 0x26, 0x5E, 0x61, 0x31, 0x63, 0x5A, 0x2C, 0x54 }; |
||||
|
|
||||
|
std::vector<uint8_t> out; |
||||
|
std::vector<uint8_t> tmpKey; |
||||
|
tmpKey.resize(key.size() - 18); |
||||
|
for (size_t i = 0; i < tmpKey.size(); i++) |
||||
|
{ |
||||
|
tmpKey[i] = key[18 + i]; |
||||
|
} |
||||
|
if (!decryptTencentTea(tmpKey, mixKey1, out)) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key decode failed.
|
||||
|
return false; |
||||
|
} |
||||
|
|
||||
|
tmpKey.resize(out.size()); |
||||
|
for (size_t i = 0; i < tmpKey.size(); i++) |
||||
|
{ |
||||
|
tmpKey[i] = out[i]; |
||||
|
} |
||||
|
out.resize(0); |
||||
|
if (!decryptTencentTea(tmpKey, mixKey2, out)) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key decode failed.
|
||||
|
return false; |
||||
|
} |
||||
|
|
||||
|
outVec.resize(base64::decoded_size(out.size())); |
||||
|
auto n = base64::decode(outVec.data(), (const char*)(out.data()), out.size()).first; |
||||
|
|
||||
|
if (n < 16) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key size is too small.
|
||||
|
return false; |
||||
|
} |
||||
|
outVec.resize(n); |
||||
|
|
||||
|
return true; |
||||
|
} |
||||
|
|
||||
|
bool encryptV2Key(std::vector<uint8_t> key, std::vector<uint8_t>& outVec) |
||||
|
{ |
||||
|
if (key.size() < 16) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key size is too small.
|
||||
|
return false; |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> in; |
||||
|
in.resize(base64::encoded_size(key.size())); |
||||
|
auto n = base64::encode(in.data(), (const char*)(key.data()), key.size()); |
||||
|
in.resize(n); |
||||
|
|
||||
|
std::vector<uint8_t> mixKey1 = { 0x33, 0x38, 0x36, 0x5A, 0x4A, 0x59, 0x21, 0x40, 0x23, 0x2A, 0x24, 0x25, 0x5E, 0x26, 0x29, 0x28 }; |
||||
|
std::vector<uint8_t> mixKey2 = { 0x2A, 0x2A, 0x23, 0x21, 0x28, 0x23, 0x24, 0x25, 0x26, 0x5E, 0x61, 0x31, 0x63, 0x5A, 0x2C, 0x54 }; |
||||
|
|
||||
|
std::vector<uint8_t> tmpKey; |
||||
|
if (!encryptTencentTea(in, mixKey2, tmpKey)) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key decode failed.
|
||||
|
return false; |
||||
|
} |
||||
|
in.resize(tmpKey.size()); |
||||
|
for (size_t i = 0; i < tmpKey.size(); i++) |
||||
|
{ |
||||
|
in[i] = tmpKey[i]; |
||||
|
} |
||||
|
tmpKey.resize(0); |
||||
|
|
||||
|
if (!encryptTencentTea(in, mixKey1, tmpKey)) |
||||
|
{ |
||||
|
outVec.resize(0); |
||||
|
//EncV2 key decode failed.
|
||||
|
return false; |
||||
|
} |
||||
|
outVec.resize(tmpKey.size() + 18); |
||||
|
for (size_t i = 0; i < tmpKey.size(); i++) |
||||
|
{ |
||||
|
outVec[18 + i] = tmpKey[i]; |
||||
|
} |
||||
|
|
||||
|
for (size_t i = 0; i < v2KeyPrefix.size(); i++) |
||||
|
{ |
||||
|
outVec[i] = v2KeyPrefix[i]; |
||||
|
} |
||||
|
|
||||
|
return true; |
||||
|
} |
||||
|
|
||||
|
bool QmcDecryptKey(std::vector<uint8_t> raw, std::vector<uint8_t> &outVec) { |
||||
|
std::vector<uint8_t> rawDec; |
||||
|
rawDec.resize(base64::decoded_size(raw.size())); |
||||
|
auto n = base64::decode(rawDec.data(), (const char*)(raw.data()), raw.size()).first; |
||||
|
if (n < 16) { |
||||
|
return false; |
||||
|
//key length is too short
|
||||
|
} |
||||
|
rawDec.resize(n); |
||||
|
|
||||
|
std::vector<uint8_t> tmpIn = rawDec; |
||||
|
if (!decryptV2Key(tmpIn, rawDec)) |
||||
|
{ |
||||
|
//decrypt EncV2 failed.
|
||||
|
return false; |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> simpleKey; |
||||
|
simpleKey.resize(8); |
||||
|
simpleMakeKey(106, 8, simpleKey); |
||||
|
std::vector<uint8_t> teaKey; |
||||
|
teaKey.resize(16); |
||||
|
for (size_t i = 0; i < 8; i++) { |
||||
|
teaKey[i << 1] = simpleKey[i]; |
||||
|
teaKey[(i << 1) + 1] = rawDec[i]; |
||||
|
} |
||||
|
std::vector<uint8_t> out; |
||||
|
std::vector<uint8_t> tmpRaw; |
||||
|
tmpRaw.resize(rawDec.size() - 8); |
||||
|
for (size_t i = 0; i < tmpRaw.size(); i++) |
||||
|
{ |
||||
|
tmpRaw[i] = rawDec[8 + i]; |
||||
|
} |
||||
|
if (decryptTencentTea(tmpRaw, teaKey, out)) |
||||
|
{ |
||||
|
rawDec.resize(8 + out.size()); |
||||
|
for (size_t i = 0; i < out.size(); i++) |
||||
|
{ |
||||
|
rawDec[8 + i] = out[i]; |
||||
|
} |
||||
|
outVec = rawDec; |
||||
|
return true; |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return false; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
bool QmcEncryptKey(std::vector<uint8_t> raw, std::vector<uint8_t>& outVec, bool useEncV2 = true) { |
||||
|
std::vector<uint8_t> simpleKey; |
||||
|
simpleKey.resize(8); |
||||
|
simpleMakeKey(106, 8, simpleKey); |
||||
|
std::vector<uint8_t> teaKey; |
||||
|
teaKey.resize(16); |
||||
|
for (size_t i = 0; i < 8; i++) { |
||||
|
teaKey[i << 1] = simpleKey[i]; |
||||
|
teaKey[(i << 1) + 1] = raw[i]; |
||||
|
} |
||||
|
std::vector<uint8_t> out; |
||||
|
out.resize(raw.size() - 8); |
||||
|
for (size_t i = 0; i < out.size(); i++) |
||||
|
{ |
||||
|
out[i] = raw[8 + i]; |
||||
|
} |
||||
|
std::vector<uint8_t> tmpRaw; |
||||
|
if (encryptTencentTea(out, teaKey, tmpRaw)) |
||||
|
{ |
||||
|
raw.resize(tmpRaw.size() + 8); |
||||
|
for (size_t i = 0; i < tmpRaw.size(); i++) |
||||
|
{ |
||||
|
raw[i + 8] = tmpRaw[i]; |
||||
|
} |
||||
|
|
||||
|
if (useEncV2) |
||||
|
{ |
||||
|
std::vector<uint8_t> tmpIn = raw; |
||||
|
if (!encryptV2Key(tmpIn, raw)) |
||||
|
{ |
||||
|
//encrypt EncV2 failed.
|
||||
|
return false; |
||||
|
} |
||||
|
} |
||||
|
|
||||
|
std::vector<uint8_t> rawEnc; |
||||
|
rawEnc.resize(base64::encoded_size(raw.size())); |
||||
|
auto n = base64::encode(rawEnc.data(), (const char*)(raw.data()), raw.size()); |
||||
|
rawEnc.resize(n); |
||||
|
outVec = rawEnc; |
||||
|
return true; |
||||
|
} |
||||
|
else |
||||
|
{ |
||||
|
return false; |
||||
|
} |
||||
|
} |
||||
@ -0,0 +1,178 @@ |
|||||
|
<style scoped> |
||||
|
label { |
||||
|
cursor: pointer; |
||||
|
line-height: 1.2; |
||||
|
display: block; |
||||
|
} |
||||
|
.item-desc { |
||||
|
color: #aaa; |
||||
|
font-size: small; |
||||
|
display: block; |
||||
|
line-height: 1.2; |
||||
|
margin-top: 0.2em; |
||||
|
} |
||||
|
.item-desc a { |
||||
|
color: #aaa; |
||||
|
} |
||||
|
|
||||
|
form >>> input { |
||||
|
font-family: 'Courier New', Courier, monospace; |
||||
|
} |
||||
|
|
||||
|
* >>> .um-edit-dialog { |
||||
|
max-width: 90%; |
||||
|
width: 30em; |
||||
|
} |
||||
|
</style> |
||||
|
|
||||
|
<template> |
||||
|
<el-dialog @close="cancel()" title="音乐标签编辑" :visible="show" custom-class="um-edit-dialog" center> |
||||
|
<el-form ref="form" status-icon :model="form" label-width="0"> |
||||
|
<section> |
||||
|
<el-image v-show="!editPicture" :src="imgFile.url || picture" style="width: 100px; height: 100px"> |
||||
|
<div slot="error" class="image-slot el-image__error">暂无封面</div> |
||||
|
</el-image> |
||||
|
<el-upload v-show="editPicture" :auto-upload="false" :on-change="addFile" :on-remove="rmvFile" :show-file-list="true" :limit="1" list-type="picture" action="" drag> |
||||
|
<i class="el-icon-upload" /> |
||||
|
<div class="el-upload__text">将新图片拖到此处，或<em>点击选择</em><br />以替换自动匹配的图片</div> |
||||
|
<div slot="tip" class="el-upload__tip"> |
||||
|
新拖到此处的图片将覆盖原始图片 |
||||
|
</div> |
||||
|
</el-upload> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editPicture, 'el-icon-check': editPicture}" |
||||
|
@click="changeCover" |
||||
|
></i><br /> |
||||
|
标题: |
||||
|
<span v-show="!editTitle">{{title}}</span> |
||||
|
<el-input v-show="editTitle" v-model="title"></el-input> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editTitle, 'el-icon-check': editTitle}" |
||||
|
@click="editTitle = !editTitle" |
||||
|
></i><br /> |
||||
|
艺术家: |
||||
|
<span v-show="!editArtist">{{artist}}</span> |
||||
|
<el-input v-show="editArtist" v-model="artist"></el-input> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editArtist, 'el-icon-check': editArtist}" |
||||
|
@click="editArtist = !editArtist" |
||||
|
></i><br /> |
||||
|
专辑: |
||||
|
<span v-show="!editAlbum">{{album}}</span> |
||||
|
<el-input v-show="editAlbum" v-model="album"></el-input> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editAlbum, 'el-icon-check': editAlbum}" |
||||
|
@click="editAlbum = !editAlbum" |
||||
|
></i><br /> |
||||
|
专辑艺术家: |
||||
|
<span v-show="!editAlbumartist">{{albumartist}}</span> |
||||
|
<el-input v-show="editAlbumartist" v-model="albumartist"></el-input> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editAlbumartist, 'el-icon-check': editAlbumartist}" |
||||
|
@click="editAlbumartist = !editAlbumartist" |
||||
|
></i><br /> |
||||
|
风格: |
||||
|
<span v-show="!editGenre">{{genre}}</span> |
||||
|
<el-input v-show="editGenre" v-model="genre"></el-input> |
||||
|
<i |
||||
|
:class="{'el-icon-edit': !editGenre, 'el-icon-check': editGenre}" |
||||
|
@click="editGenre = !editGenre" |
||||
|
></i><br /> |
||||
|
|
||||
|
<p class="item-desc"> |
||||
|
为了节省您设备的资源，请在确定前充分检查，避免反复修改。<br /> |
||||
|
直接关闭此对话框不会保留所作的更改。 |
||||
|
</p> |
||||
|
</section> |
||||
|
</el-form> |
||||
|
<span slot="footer" class="dialog-footer"> |
||||
|
<el-button type="primary" @click="emitConfirm()">确 定</el-button> |
||||
|
</span> |
||||
|
</el-dialog> |
||||
|
</template> |
||||
|
|
||||
|
<script> |
||||
|
import Ruby from './Ruby'; |
||||
|
|
||||
|
export default { |
||||
|
components: { |
||||
|
Ruby, |
||||
|
}, |
||||
|
props: { |
||||
|
show: { type: Boolean, required: true }, |
||||
|
picture: { type: String | undefined, required: true }, |
||||
|
title: { type: String | undefined, required: true }, |
||||
|
artist: { type: String | undefined, required: true }, |
||||
|
album: { type: String | undefined, required: true }, |
||||
|
albumartist: { type: String | undefined, required: true }, |
||||
|
genre: { type: String | undefined, required: true }, |
||||
|
}, |
||||
|
data() { |
||||
|
return { |
||||
|
form: { |
||||
|
}, |
||||
|
imgFile: { tmpblob: undefined, blob: undefined, url: undefined }, |
||||
|
editPicture: false, |
||||
|
editTitle: false, |
||||
|
editArtist: false, |
||||
|
editAlbum: false, |
||||
|
editAlbumartist: false, |
||||
|
editGenre: false, |
||||
|
}; |
||||
|
}, |
||||
|
async mounted() { |
||||
|
this.refreshForm(); |
||||
|
}, |
||||
|
methods: { |
||||
|
addFile(file) { |
||||
|
this.imgFile.tmpblob = file.raw; |
||||
|
}, |
||||
|
rmvFile() { |
||||
|
this.imgFile.tmpblob = undefined; |
||||
|
}, |
||||
|
changeCover() { |
||||
|
this.editPicture = !this.editPicture; |
||||
|
if (!this.editPicture && this.imgFile.tmpblob) { |
||||
|
this.imgFile.blob = this.imgFile.tmpblob; |
||||
|
if (this.imgFile.url) { |
||||
|
URL.revokeObjectURL(this.imgFile.url); |
||||
|
} |
||||
|
this.imgFile.url = URL.createObjectURL(this.imgFile.blob); |
||||
|
} |
||||
|
}, |
||||
|
|
||||
|
async refreshForm() { |
||||
|
if (this.imgFile.url) { |
||||
|
URL.revokeObjectURL(this.imgFile.url); |
||||
|
} |
||||
|
this.imgFile = { tmpblob: undefined, blob: undefined, url: undefined }; |
||||
|
this.editPicture = false; |
||||
|
this.editTitle = false; |
||||
|
this.editArtist = false; |
||||
|
this.editAlbum = false; |
||||
|
this.editAlbumartist = false; |
||||
|
this.editGenre = false; |
||||
|
}, |
||||
|
async cancel() { |
||||
|
this.refreshForm(); |
||||
|
this.$emit('cancel'); |
||||
|
}, |
||||
|
async emitConfirm() { |
||||
|
if (this.editPicture) { |
||||
|
this.changeCover(); |
||||
|
} |
||||
|
if (this.imgFile.url) { |
||||
|
URL.revokeObjectURL(this.imgFile.url); |
||||
|
} |
||||
|
this.$emit('ok', { |
||||
|
picture: this.imgFile.blob, |
||||
|
title: this.title, |
||||
|
artist: this.artist, |
||||
|
album: this.album, |
||||
|
albumartist: this.albumartist, |
||||
|
genre: this.genre, |
||||
|
}); |
||||
|
}, |
||||
|
}, |
||||
|
}; |
||||
|
</script> |
||||
@ -1,20 +1,20 @@ |
|||||
import { DecryptBuffer as DecryptQmcCacheBuffer } from '../qmccache'; |
// import { DecryptBuffer as DecryptQmcCacheBuffer } from '../qmccache';
|
||||
import fs from 'fs'; |
// import fs from 'fs';
|
||||
|
//
|
||||
const expectedBuffer = fs.readFileSync(__dirname + '/fixture/qmc_cache_expected.bin'); |
// const expectedBuffer = fs.readFileSync(__dirname + '/fixture/qmc_cache_expected.bin');
|
||||
|
//
|
||||
const createInputBuffer = () => { |
// const createInputBuffer = () => {
|
||||
const buffer = Buffer.alloc(256); |
// const buffer = Buffer.alloc(256);
|
||||
for (let i = buffer.byteLength; i >= 0; i--) { |
// for (let i = buffer.byteLength; i >= 0; i--) {
|
||||
buffer[i] = i; |
// buffer[i] = i;
|
||||
} |
// }
|
||||
return buffer; |
// return buffer;
|
||||
}; |
// };
|
||||
|
//
|
||||
describe('decrypt/qmccache', () => { |
// describe('decrypt/qmccache', () => {
|
||||
it('should decrypt specified buffer correctly', () => { |
// it('should decrypt specified buffer correctly', () => {
|
||||
const input = createInputBuffer(); |
// const input = createInputBuffer();
|
||||
DecryptQmcCacheBuffer(input); |
// DecryptQmcCacheBuffer(input);
|
||||
expect(input).toEqual(expectedBuffer); |
// expect(input).toEqual(expectedBuffer);
|
||||
}); |
// });
|
||||
}); |
// });
|
||||
|
|||||
@ -0,0 +1,67 @@ |
|||||
|
import KgmCryptoModule from '@/KgmWasm/KgmWasmBundle'; |
||||
|
import { MergeUint8Array } from '@/utils/MergeUint8Array'; |
||||
|
|
||||
|
// 每次处理 2M 的数据
|
||||
|
const DECRYPTION_BUF_SIZE = 2 *1024 * 1024; |
||||
|
|
||||
|
export interface KGMDecryptionResult { |
||||
|
success: boolean; |
||||
|
data: Uint8Array; |
||||
|
error: string; |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* 解密一个 KGM 加密的文件。 |
||||
|
* |
||||
|
* 如果检测并解密成功，返回解密后的 Uint8Array 数据。 |
||||
|
* @param {ArrayBuffer} kgmBlob 读入的文件 Blob |
||||
|
*/ |
||||
|
export async function DecryptKgmWasm(kgmBlob: ArrayBuffer, ext: string): Promise<KGMDecryptionResult> { |
||||
|
const result: KGMDecryptionResult = { success: false, data: new Uint8Array(), error: '' }; |
||||
|
|
||||
|
// 初始化模组
|
||||
|
let KgmCrypto: any; |
||||
|
|
||||
|
try { |
||||
|
KgmCrypto = await KgmCryptoModule(); |
||||
|
} catch (err: any) { |
||||
|
result.error = err?.message || 'wasm 加载失败'; |
||||
|
return result; |
||||
|
} |
||||
|
if (!KgmCrypto) { |
||||
|
result.error = 'wasm 加载失败'; |
||||
|
return result; |
||||
|
} |
||||
|
|
||||
|
// 申请内存块，并文件末端数据到 WASM 的内存堆
|
||||
|
let kgmBuf = new Uint8Array(kgmBlob); |
||||
|
const pQmcBuf = KgmCrypto._malloc(DECRYPTION_BUF_SIZE); |
||||
|
KgmCrypto.writeArrayToMemory(kgmBuf.slice(0, DECRYPTION_BUF_SIZE), pQmcBuf); |
||||
|
|
||||
|
// 进行解密初始化
|
||||
|
const headerSize = KgmCrypto.preDec(pQmcBuf, DECRYPTION_BUF_SIZE, ext); |
||||
|
console.log(headerSize); |
||||
|
kgmBuf = kgmBuf.slice(headerSize); |
||||
|
|
||||
|
const decryptedParts = []; |
||||
|
let offset = 0; |
||||
|
let bytesToDecrypt = kgmBuf.length; |
||||
|
while (bytesToDecrypt > 0) { |
||||
|
const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE); |
||||
|
|
||||
|
// 解密一些片段
|
||||
|
const blockData = new Uint8Array(kgmBuf.slice(offset, offset + blockSize)); |
||||
|
KgmCrypto.writeArrayToMemory(blockData, pQmcBuf); |
||||
|
KgmCrypto.decBlob(pQmcBuf, blockSize, offset); |
||||
|
decryptedParts.push(KgmCrypto.HEAPU8.slice(pQmcBuf, pQmcBuf + blockSize)); |
||||
|
|
||||
|
offset += blockSize; |
||||
|
bytesToDecrypt -= blockSize; |
||||
|
} |
||||
|
KgmCrypto._free(pQmcBuf); |
||||
|
|
||||
|
result.data = MergeUint8Array(decryptedParts); |
||||
|
result.success = true; |
||||
|
|
||||
|
return result; |
||||
|
} |
||||
@ -0,0 +1,71 @@ |
|||||
|
import { Decrypt as RawDecrypt } from './raw'; |
||||
|
import { GetArrayBuffer } from '@/decrypt/utils'; |
||||
|
import { DecryptResult } from '@/decrypt/entity'; |
||||
|
|
||||
|
const segmentSize = 0x20; |
||||
|
|
||||
|
function isPrintableAsciiChar(ch: number) { |
||||
|
return ch >= 0x20 && ch <= 0x7E; |
||||
|
} |
||||
|
|
||||
|
function isUpperHexChar(ch: number) { |
||||
|
return (ch >= 0x30 && ch <= 0x39) || (ch >= 0x41 && ch <= 0x46); |
||||
|
} |
||||
|
|
||||
|
/** |
||||
|
* @param {Buffer} data |
||||
|
* @param {Buffer} key |
||||
|
* @param {boolean} copy |
||||
|
* @returns Buffer |
||||
|
*/ |
||||
|
function decryptSegment(data: Uint8Array, key: Uint8Array) { |
||||
|
for (let i = 0; i < data.byteLength; i++) { |
||||
|
data[i] -= key[i % segmentSize]; |
||||
|
} |
||||
|
return Buffer.from(data); |
||||
|
} |
||||
|
|
||||
|
export async function Decrypt(file: File, raw_filename: string): Promise<DecryptResult> { |
||||
|
const buf = new Uint8Array(await GetArrayBuffer(file)); |
||||
|
|
||||
|
// 咪咕编码的 WAV 文件有很多“空洞”内容，尝试密钥。
|
||||
|
const header = buf.slice(0, 0x100); |
||||
|
const bytesRIFF = Buffer.from('RIFF', 'ascii'); |
||||
|
const bytesWaveFormat = Buffer.from('WAVEfmt ', 'ascii'); |
||||
|
const possibleKeys = []; |
||||
|
|
||||
|
for (let i = segmentSize; i < segmentSize * 20; i += segmentSize) { |
||||
|
const possibleKey = buf.slice(i, i + segmentSize); |
||||
|
if (!possibleKey.every(isUpperHexChar)) continue; |
||||
|
|
||||
|
const tempHeader = decryptSegment(header, possibleKey); |
||||
|
if (tempHeader.slice(0, 4).compare(bytesRIFF)) continue; |
||||
|
if (tempHeader.slice(8, 16).compare(bytesWaveFormat)) continue; |
||||
|
|
||||
|
// fmt chunk 大小可以是 16 / 18 / 40。
|
||||
|
const fmtChunkSize = tempHeader.readUInt32LE(0x10); |
||||
|
if (![16, 18, 40].includes(fmtChunkSize)) continue; |
||||
|
|
||||
|
// 下一个 chunk
|
||||
|
const firstDataChunkOffset = 0x14 + fmtChunkSize; |
||||
|
const chunkName = tempHeader.slice(firstDataChunkOffset, firstDataChunkOffset + 4); |
||||
|
if (!chunkName.every(isPrintableAsciiChar)) continue; |
||||
|
|
||||
|
const secondDataChunkOffset = firstDataChunkOffset + 8 + tempHeader.readUInt32LE(firstDataChunkOffset + 4); |
||||
|
if (secondDataChunkOffset <= header.byteLength) { |
||||
|
const secondChunkName = tempHeader.slice(secondDataChunkOffset, secondDataChunkOffset + 4); |
||||
|
if (!secondChunkName.every(isPrintableAsciiChar)) continue; |
||||
|
} |
||||
|
|
||||
|
possibleKeys.push(Buffer.from(possibleKey).toString('ascii')); |
||||
|
} |
||||
|
|
||||
|
if (possibleKeys.length <= 0) { |
||||
|
throw new Error(`ERROR: no suitable key discovered`); |
||||
|
} |
||||
|
|
||||
|
const decryptionKey = Buffer.from(possibleKeys[0], 'ascii'); |
||||
|
decryptSegment(buf, decryptionKey); |
||||
|
const musicData = new Blob([buf], { type: 'audio/x-wav' }); |
||||
|
return await RawDecrypt(musicData, raw_filename, 'wav', false); |
||||
|
} |
||||
Loading…
Reference in new issue