【Android 安全】DEX 加密 ( 代理 Application 开发 | 交叉编译 OpenSSL 开源库 )

韩曙亮

发布于 2023-03-28 19:06:35

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文章被收录于专栏：韩曙亮的移动开发专栏韩曙亮的移动开发专栏

文章目录

一、OpenSSL 开源库简介

OpenSSL 是开源密码库 , 其中封装了常用的密码算法 , 常用密钥 , 证书封装管理 , SSL 协议 ;

SSL : 全称 Secure Sockets Layer , 安全套接层协议 , 提供网络中的保密传输功能 ;

参考简介 : 百度百科-OpenSSL

OpenSSL 官网 : https://www.openssl.org/

OpenSSL Wiki 页面 : https://wiki.openssl.org/index.php/Main_Page

OpenSSL Wiki Android 编译页面 : https://wiki.openssl.org/index.php/Android

OpenSSL 源码下载地址 : https://www.openssl.org/source/

GitHub 地址 : https://www.openssl.org/source/

二、OpenSSL 源码及环境变量脚本下载

参考 OpenSSL Wiki Android 编译页面 : https://wiki.openssl.org/index.php/Android ;

需要准备两个文件 :

源码文件 : 文档中提示下载 openssl-1.0.1g.tar.gz 版本的 OpenSSL , 在 https://www.openssl.org/source/old/1.0.1/ 页面可以查看 1.0.1 版本的历史源码 ; 也可以尝试下载其它版本进行交叉编译 ;
编译脚本 : setenv-android.sh , 以下是编译脚本内容 , 编译脚本中主要是进行一些环境变量配置 ;

#!/bin/bash
# Cross-compile environment for Android on ARMv7 and x86
#
# Contents licensed under the terms of the OpenSSL license
# http://www.openssl.org/source/license.html
#
# See http://wiki.openssl.org/index.php/FIPS_Library_and_Android
#   and http://wiki.openssl.org/index.php/Android

#####################################################################

# Set ANDROID_NDK_ROOT to you NDK location. For example,
# /opt/android-ndk-r8e or /opt/android-ndk-r9. This can be done in a
# login script. If ANDROID_NDK_ROOT is not specified, the script will
# try to pick it up with the value of _ANDROID_NDK_ROOT below. If
# ANDROID_NDK_ROOT is set, then the value is ignored.
# _ANDROID_NDK="android-ndk-r8e"
_ANDROID_NDK="android-ndk-r9"
# _ANDROID_NDK="android-ndk-r10"

# Set _ANDROID_EABI to the EABI you want to use. You can find the
# list in $ANDROID_NDK_ROOT/toolchains. This value is always used.
# _ANDROID_EABI="x86-4.6"
# _ANDROID_EABI="arm-linux-androideabi-4.6"
_ANDROID_EABI="arm-linux-androideabi-4.8"

# Set _ANDROID_ARCH to the architecture you are building for.
# This value is always used.
# _ANDROID_ARCH=arch-x86
_ANDROID_ARCH=arch-arm

# Set _ANDROID_API to the API you want to use. You should set it
# to one of: android-14, android-9, android-8, android-14, android-5
# android-4, or android-3. You can't set it to the latest (for
# example, API-17) because the NDK does not supply the platform. At
# Android 5.0, there will likely be another platform added (android-22?).
# This value is always used.
# _ANDROID_API="android-14"
_ANDROID_API="android-18"
# _ANDROID_API="android-19"

#####################################################################

# If the user did not specify the NDK location, try and pick it up.
# We expect something like ANDROID_NDK_ROOT=/opt/android-ndk-r8e
# or ANDROID_NDK_ROOT=/usr/local/android-ndk-r8e.

if [ -z "$ANDROID_NDK_ROOT" ]; then

  _ANDROID_NDK_ROOT=""
  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/usr/local/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="/usr/local/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/opt/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="/opt/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$HOME/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="$HOME/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$PWD/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="$PWD/$_ANDROID_NDK"
  fi

  # If a path was set, then export it
  if [ ! -z "$_ANDROID_NDK_ROOT" ] && [ -d "$_ANDROID_NDK_ROOT" ]; then
    export ANDROID_NDK_ROOT="$_ANDROID_NDK_ROOT"
  fi
fi

# Error checking
# ANDROID_NDK_ROOT should always be set by the user (even when not running this script)
# http://groups.google.com/group/android-ndk/browse_thread/thread/a998e139aca71d77
if [ -z "$ANDROID_NDK_ROOT" ] || [ ! -d "$ANDROID_NDK_ROOT" ]; then
  echo "Error: ANDROID_NDK_ROOT is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT"
  # exit 1
fi

# Error checking
if [ ! -d "$ANDROID_NDK_ROOT/toolchains" ]; then
  echo "Error: ANDROID_NDK_ROOT/toolchains is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT/toolchains"
  # exit 1
fi

# Error checking
if [ ! -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI" ]; then
  echo "Error: ANDROID_EABI is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI"
  # exit 1
fi

#####################################################################

# Based on ANDROID_NDK_ROOT, try and pick up the required toolchain. We expect something like:
# /opt/android-ndk-r83/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin
# Once we locate the toolchain, we add it to the PATH. Note: this is the 'hard way' of
# doing things according to the NDK documentation for Ice Cream Sandwich.
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html

ANDROID_TOOLCHAIN=""
for host in "linux-x86_64" "linux-x86" "darwin-x86_64" "darwin-x86"
do
  if [ -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin" ]; then
    ANDROID_TOOLCHAIN="$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin"
    break
  fi
done

# Error checking
if [ -z "$ANDROID_TOOLCHAIN" ] || [ ! -d "$ANDROID_TOOLCHAIN" ]; then
  echo "Error: ANDROID_TOOLCHAIN is not valid. Please edit this script."
  # echo "$ANDROID_TOOLCHAIN"
  # exit 1
fi

case $_ANDROID_ARCH in
	arch-arm)	  
      ANDROID_TOOLS="arm-linux-androideabi-gcc arm-linux-androideabi-ranlib arm-linux-androideabi-ld"
	  ;;
	arch-x86)	  
      ANDROID_TOOLS="i686-linux-android-gcc i686-linux-android-ranlib i686-linux-android-ld"
	  ;;	  
	*)
	  echo "ERROR ERROR ERROR"
	  ;;
esac

for tool in $ANDROID_TOOLS
do
  # Error checking
  if [ ! -e "$ANDROID_TOOLCHAIN/$tool" ]; then
    echo "Error: Failed to find $tool. Please edit this script."
    # echo "$ANDROID_TOOLCHAIN/$tool"
    # exit 1
  fi
done

# Only modify/export PATH if ANDROID_TOOLCHAIN good
if [ ! -z "$ANDROID_TOOLCHAIN" ]; then
  export ANDROID_TOOLCHAIN="$ANDROID_TOOLCHAIN"
  export PATH="$ANDROID_TOOLCHAIN":"$PATH"
fi

#####################################################################

# For the Android SYSROOT. Can be used on the command line with --sysroot
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html
export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH"
export CROSS_SYSROOT="$ANDROID_SYSROOT"
export NDK_SYSROOT="$ANDROID_SYSROOT"

# Error checking
if [ -z "$ANDROID_SYSROOT" ] || [ ! -d "$ANDROID_SYSROOT" ]; then
  echo "Error: ANDROID_SYSROOT is not valid. Please edit this script."
  # echo "$ANDROID_SYSROOT"
  # exit 1
fi

#####################################################################

# If the user did not specify the FIPS_SIG location, try and pick it up
# If the user specified a bad location, then try and pick it up too.
if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then

  # Try and locate it
  _FIPS_SIG=""
  if [ -d "/usr/local/ssl/$_ANDROID_API" ]; then
    _FIPS_SIG=`find "/usr/local/ssl/$_ANDROID_API" -name incore`
  fi

  if [ ! -e "$_FIPS_SIG" ]; then
    _FIPS_SIG=`find $PWD -name incore`
  fi

  # If a path was set, then export it
  if [ ! -z "$_FIPS_SIG" ] && [ -e "$_FIPS_SIG" ]; then
    export FIPS_SIG="$_FIPS_SIG"
  fi
fi

# Error checking. Its OK to ignore this if you are *not* building for FIPS
if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then
  echo "Error: FIPS_SIG does not specify incore module. Please edit this script."
  # echo "$FIPS_SIG"
  # exit 1
fi

#####################################################################

# Most of these should be OK (MACHINE, SYSTEM, ARCH). RELEASE is ignored.
export MACHINE=armv7
export RELEASE=2.6.37
export SYSTEM=android
export ARCH=arm
export CROSS_COMPILE="arm-linux-androideabi-"

if [ "$_ANDROID_ARCH" == "arch-x86" ]; then
	export MACHINE=i686
	export RELEASE=2.6.37
	export SYSTEM=android
	export ARCH=x86
	export CROSS_COMPILE="i686-linux-android-"
fi

# For the Android toolchain
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html
export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH"
export SYSROOT="$ANDROID_SYSROOT"
export NDK_SYSROOT="$ANDROID_SYSROOT"
export ANDROID_NDK_SYSROOT="$ANDROID_SYSROOT"
export ANDROID_API="$_ANDROID_API"

# CROSS_COMPILE and ANDROID_DEV are DFW (Don't Fiddle With). Its used by OpenSSL build system.
# export CROSS_COMPILE="arm-linux-androideabi-"
export ANDROID_DEV="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH/usr"
export HOSTCC=gcc

VERBOSE=1
if [ ! -z "$VERBOSE" ] && [ "$VERBOSE" != "0" ]; then
  echo "ANDROID_NDK_ROOT: $ANDROID_NDK_ROOT"
  echo "ANDROID_ARCH: $_ANDROID_ARCH"
  echo "ANDROID_EABI: $_ANDROID_EABI"
  echo "ANDROID_API: $ANDROID_API"
  echo "ANDROID_SYSROOT: $ANDROID_SYSROOT"
  echo "ANDROID_TOOLCHAIN: $ANDROID_TOOLCHAIN"
  echo "FIPS_SIG: $FIPS_SIG"
  echo "CROSS_COMPILE: $CROSS_COMPILE"
  echo "ANDROID_DEV: $ANDROID_DEV"
fi

将上述两个文件都放在同一个目录中 ;

三、修改环境变量脚本

修改 Setenv-android.sh 脚本中的如下选项 :

_ANDROID_NDK : NDK 版本 , 如 android-ndk-r8e ; 如果设置了 ANDROID_NDK_ROOT 环境变量 , 该选项可以不用设置 ;

_ANDROID_NDK="android-ndk-r17c"

ANDROID_NDK_ROOT : 指定 NDK 路径 , 如果配置了该路径 , 可以忽略上面的 _ANDROID_NDK 配置 ;

# 这里如果用户没有指定 ANDROID_NDK_ROOT NDK 工具根目录 , 就执行下面的逻辑, 
# 如果指定了, 就没有下面代码什么事了
# 这里指定下该环境变量 , 上面的 _ANDROID_NDK 变量也失去了相应作用
export ANDROID_NDK_ROOT=/root/NDK/android-ndk-r17c

_ANDROID_ARCH : 编译的 CPU 架构 , arch-x86 , arch-arm ;

_ANDROID_ARCH=arch-arm

_ANDROID_EABI : 交叉编译器 , 如 arm-linux-androideabi-4.6, arm-linux-androideabi-4.8, x86-4.6 or x86-4.8 ; 配置前到 NDK 目录下的 toolchains 中查看要使用哪个版本的交叉编译工具 , 该配置一定要从 NDK 目录中查找 ;

_ANDROID_EABI="arm-linux-androideabi-4.9"

_ANDROID_API : 最低 Android 版本 , 如 android-14 , android-18 ;

_ANDROID_API="android-18"

修改后的 setenv-android.sh 脚本 :

#!/bin/bash
# Cross-compile environment for Android on ARMv7 and x86
#
# Contents licensed under the terms of the OpenSSL license
# http://www.openssl.org/source/license.html
#
# See http://wiki.openssl.org/index.php/FIPS_Library_and_Android
#   and http://wiki.openssl.org/index.php/Android

#####################################################################

# Set ANDROID_NDK_ROOT to you NDK location. For example,
# /opt/android-ndk-r8e or /opt/android-ndk-r9. This can be done in a
# login script. If ANDROID_NDK_ROOT is not specified, the script will
# try to pick it up with the value of _ANDROID_NDK_ROOT below. If
# ANDROID_NDK_ROOT is set, then the value is ignored.
# _ANDROID_NDK="android-ndk-r8e"
_ANDROID_NDK="android-ndk-r17c"
# _ANDROID_NDK="android-ndk-r10"

# Set _ANDROID_EABI to the EABI you want to use. You can find the
# list in $ANDROID_NDK_ROOT/toolchains. This value is always used.
# _ANDROID_EABI="x86-4.6"
# _ANDROID_EABI="arm-linux-androideabi-4.6"
_ANDROID_EABI="arm-linux-androideabi-4.9"

# Set _ANDROID_ARCH to the architecture you are building for.
# This value is always used.
# _ANDROID_ARCH=arch-x86
_ANDROID_ARCH=arch-arm

# Set _ANDROID_API to the API you want to use. You should set it
# to one of: android-14, android-9, android-8, android-14, android-5
# android-4, or android-3. You can't set it to the latest (for
# example, API-17) because the NDK does not supply the platform. At
# Android 5.0, there will likely be another platform added (android-22?).
# This value is always used.
# _ANDROID_API="android-14"
_ANDROID_API="android-18"
# _ANDROID_API="android-19"

#####################################################################

# If the user did not specify the NDK location, try and pick it up.
# We expect something like ANDROID_NDK_ROOT=/opt/android-ndk-r8e
# or ANDROID_NDK_ROOT=/usr/local/android-ndk-r8e.

# 这里如果用户没有指定 ANDROID_NDK_ROOT NDK 工具根目录 , 就执行下面的逻辑, 
# 如果指定了, 就没有下面代码什么事了
# 这里指定下该环境变量 , 上面的 _ANDROID_NDK 变量也失去了相应作用
export ANDROID_NDK_ROOT=/root/NDK/android-ndk-r17c

if [ -z "$ANDROID_NDK_ROOT" ]; then

  _ANDROID_NDK_ROOT=""
  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/usr/local/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="/usr/local/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "/opt/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="/opt/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$HOME/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="$HOME/$_ANDROID_NDK"
  fi

  if [ -z "$_ANDROID_NDK_ROOT" ] && [ -d "$PWD/$_ANDROID_NDK" ]; then
    _ANDROID_NDK_ROOT="$PWD/$_ANDROID_NDK"
  fi

  # If a path was set, then export it
  if [ ! -z "$_ANDROID_NDK_ROOT" ] && [ -d "$_ANDROID_NDK_ROOT" ]; then
    export ANDROID_NDK_ROOT="$_ANDROID_NDK_ROOT"
  fi
fi

# Error checking
# ANDROID_NDK_ROOT should always be set by the user (even when not running this script)
# http://groups.google.com/group/android-ndk/browse_thread/thread/a998e139aca71d77
if [ -z "$ANDROID_NDK_ROOT" ] || [ ! -d "$ANDROID_NDK_ROOT" ]; then
  echo "Error: ANDROID_NDK_ROOT is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT"
  # exit 1
fi

# Error checking
if [ ! -d "$ANDROID_NDK_ROOT/toolchains" ]; then
  echo "Error: ANDROID_NDK_ROOT/toolchains is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT/toolchains"
  # exit 1
fi

# Error checking
if [ ! -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI" ]; then
  echo "Error: ANDROID_EABI is not a valid path. Please edit this script."
  # echo "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI"
  # exit 1
fi

#####################################################################

# Based on ANDROID_NDK_ROOT, try and pick up the required toolchain. We expect something like:
# /opt/android-ndk-r83/toolchains/arm-linux-androideabi-4.7/prebuilt/linux-x86_64/bin
# Once we locate the toolchain, we add it to the PATH. Note: this is the 'hard way' of
# doing things according to the NDK documentation for Ice Cream Sandwich.
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html

ANDROID_TOOLCHAIN=""
for host in "linux-x86_64" "linux-x86" "darwin-x86_64" "darwin-x86"
do
  if [ -d "$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin" ]; then
    ANDROID_TOOLCHAIN="$ANDROID_NDK_ROOT/toolchains/$_ANDROID_EABI/prebuilt/$host/bin"
    break
  fi
done

# Error checking
if [ -z "$ANDROID_TOOLCHAIN" ] || [ ! -d "$ANDROID_TOOLCHAIN" ]; then
  echo "Error: ANDROID_TOOLCHAIN is not valid. Please edit this script."
  # echo "$ANDROID_TOOLCHAIN"
  # exit 1
fi

case $_ANDROID_ARCH in
	arch-arm)	  
      ANDROID_TOOLS="arm-linux-androideabi-gcc arm-linux-androideabi-ranlib arm-linux-androideabi-ld"
	  ;;
	arch-x86)	  
      ANDROID_TOOLS="i686-linux-android-gcc i686-linux-android-ranlib i686-linux-android-ld"
	  ;;	  
	*)
	  echo "ERROR ERROR ERROR"
	  ;;
esac

for tool in $ANDROID_TOOLS
do
  # Error checking
  if [ ! -e "$ANDROID_TOOLCHAIN/$tool" ]; then
    echo "Error: Failed to find $tool. Please edit this script."
    # echo "$ANDROID_TOOLCHAIN/$tool"
    # exit 1
  fi
done

# Only modify/export PATH if ANDROID_TOOLCHAIN good
if [ ! -z "$ANDROID_TOOLCHAIN" ]; then
  export ANDROID_TOOLCHAIN="$ANDROID_TOOLCHAIN"
  export PATH="$ANDROID_TOOLCHAIN":"$PATH"
fi

#####################################################################

# For the Android SYSROOT. Can be used on the command line with --sysroot
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html
export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH"
export CROSS_SYSROOT="$ANDROID_SYSROOT"
export NDK_SYSROOT="$ANDROID_SYSROOT"

# Error checking
if [ -z "$ANDROID_SYSROOT" ] || [ ! -d "$ANDROID_SYSROOT" ]; then
  echo "Error: ANDROID_SYSROOT is not valid. Please edit this script."
  # echo "$ANDROID_SYSROOT"
  # exit 1
fi

#####################################################################

# If the user did not specify the FIPS_SIG location, try and pick it up
# If the user specified a bad location, then try and pick it up too.
if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then

  # Try and locate it
  _FIPS_SIG=""
  if [ -d "/usr/local/ssl/$_ANDROID_API" ]; then
    _FIPS_SIG=`find "/usr/local/ssl/$_ANDROID_API" -name incore`
  fi

  if [ ! -e "$_FIPS_SIG" ]; then
    _FIPS_SIG=`find $PWD -name incore`
  fi

  # If a path was set, then export it
  if [ ! -z "$_FIPS_SIG" ] && [ -e "$_FIPS_SIG" ]; then
    export FIPS_SIG="$_FIPS_SIG"
  fi
fi

# Error checking. Its OK to ignore this if you are *not* building for FIPS
if [ -z "$FIPS_SIG" ] || [ ! -e "$FIPS_SIG" ]; then
  echo "Error: FIPS_SIG does not specify incore module. Please edit this script."
  # echo "$FIPS_SIG"
  # exit 1
fi

#####################################################################

# Most of these should be OK (MACHINE, SYSTEM, ARCH). RELEASE is ignored.
export MACHINE=armv7
export RELEASE=2.6.37
export SYSTEM=android
export ARCH=arm
export CROSS_COMPILE="arm-linux-androideabi-"

if [ "$_ANDROID_ARCH" == "arch-x86" ]; then
	export MACHINE=i686
	export RELEASE=2.6.37
	export SYSTEM=android
	export ARCH=x86
	export CROSS_COMPILE="i686-linux-android-"
fi

# For the Android toolchain
# https://android.googlesource.com/platform/ndk/+/ics-mr0/docs/STANDALONE-TOOLCHAIN.html
export ANDROID_SYSROOT="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH"
export SYSROOT="$ANDROID_SYSROOT"
export NDK_SYSROOT="$ANDROID_SYSROOT"
export ANDROID_NDK_SYSROOT="$ANDROID_SYSROOT"
export ANDROID_API="$_ANDROID_API"

# CROSS_COMPILE and ANDROID_DEV are DFW (Don't Fiddle With). Its used by OpenSSL build system.
# export CROSS_COMPILE="arm-linux-androideabi-"
export ANDROID_DEV="$ANDROID_NDK_ROOT/platforms/$_ANDROID_API/$_ANDROID_ARCH/usr"
export HOSTCC=gcc

VERBOSE=1
if [ ! -z "$VERBOSE" ] && [ "$VERBOSE" != "0" ]; then
  echo "ANDROID_NDK_ROOT: $ANDROID_NDK_ROOT"
  echo "ANDROID_ARCH: $_ANDROID_ARCH"
  echo "ANDROID_EABI: $_ANDROID_EABI"
  echo "ANDROID_API: $ANDROID_API"
  echo "ANDROID_SYSROOT: $ANDROID_SYSROOT"
  echo "ANDROID_TOOLCHAIN: $ANDROID_TOOLCHAIN"
  echo "FIPS_SIG: $FIPS_SIG"
  echo "CROSS_COMPILE: $CROSS_COMPILE"
  echo "ANDROID_DEV: $ANDROID_DEV"
fi

四、OpenSSL 交叉编译

准备源码和环境变量脚本 ,

# 如果之前有该目录, 删除
rm -rf openssl-1.1.0g/
# 解压源码
tar xvf openssl-1.1.0g.tar.gz
# 修改 shell 脚本权限 
chmod a+x setenv-android.sh

初始化环境变量 , 并进入源码根目录 ;

# 初始化环境变量 
source ./setenv-android.sh
# 进入源码根目录 
cd openssl-1.1.0g/

在源码根目录中运行如下命令 , --openssldir 指定输出目录 , --prefix 指定编译后的动态库输出目录 ;

# 生成 Makefile 编译脚本 
./config shared no-ssl2 no-ssl3 no-comp no-hw no-engine --openssldir=`pwd`/android/arm/openssl --prefix=`pwd`/android/arm

编译源码 : 执行下面的代码 , 完成交叉编译工作 ;

# 编译源码 
make depend 
make all

将生成的库安装到指定的目录中 ; 该步骤的作用是将编译后的结果 , 输出到 --prefix=pwd/android/arm 指定的目录中 ;

# 安装源码到指定目录 
sudo -E make install CC=/root/NDK/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc RANLIB=/root/NDK/android-ndk-r17c/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ranlib

编译结果 :