android studio使用openssl

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hac425 11月 19, 2017
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前言

逆向的基础是开发, 逆向分析时很多时候会使用一些公开的加密函数来对数据进行加密,通过使用 openssl 熟悉下。

正文

首先得先编译出来 openssl,然后把它们复制到你的工程目录下。

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includeopenssl 的头文件。lib 下的那些是编译出来的so。

然后修改 build.gradle 中的 cmake 项:

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cppFlags 是编译选项, abiFilters指定编译so的 abi,和 刚才 lib 目录中的目录项对应。后面会用到。

增加 paste image

jniLibs.srcDirs 的值为openssl so的目录。表示打包时直接复制这些就行了。
最终的 build.gradle

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apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.administrator.oi"
minSdkVersion 19
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
externalNativeBuild {
cmake {
cppFlags "-std=c++11 -frtti -fexceptions"
abiFilters 'armeabi', 'armeabi-v7a'
}
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
sourceSets {
main {
jniLibs.srcDirs = ["C:\\Users\\Administrator\\AndroidStudioProjects\\oi\\app\\openssl_resouce\\lib"]
}
}
externalNativeBuild {
cmake {
path "CMakeLists.txt"
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

然后修改 CMakeLists.txt, 中文注释的地方就是修改的地方。

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# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html
# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 3.4.1)
# 设置头文件加载的目录
include_directories(C:/Users/Administrator/AndroidStudioProjects/oi/app/openssl_resouce/include)
#动态方式加载
add_library(openssl SHARED IMPORTED )
add_library(ssl SHARED IMPORTED )
#引入第三方.so库,根据${ANDROID_ABI} 引用不同的库
set_target_properties(openssl PROPERTIES IMPORTED_LOCATION C:/Users/Administrator/AndroidStudioProjects/oi/app/openssl_resouce/lib/${ANDROID_ABI}/libcrypto.so)
set_target_properties(ssl PROPERTIES IMPORTED_LOCATION C:/Users/Administrator/AndroidStudioProjects/oi/app/openssl_resouce/lib/${ANDROID_ABI}/libssl.so)
# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.
add_library( # Sets the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/native-lib.cpp )
# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.
find_library( # Sets the name of the path variable.
log-lib
# Specifies the name of the NDK library that
# you want CMake to locate.
log )
# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.
# 设置链接选项
target_link_libraries( # Specifies the target library.
native-lib
openssl
ssl
# Links the target library to the log library
# included in the NDK.
${log-lib} )

然后就可以使用了。

项目路径

https://gitee.com/hac425/android_openssl/

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本文链接:http://blog.hac425.top/2017/11/19/android_studio_use_openssl.html