android ndk-build 编译静态库libxx.a 以及Android studio openssl 静态库配置(cmake)

#ifndef ssl_hash_h
#define ssl_hash_h


# ifdef  __cplusplus
extern "C" {
#endif


#include <stdio.h>

/*
 * openssl sha256
 * */
int ssl_sha256(const char *in_data,int in_len,char *out_hash);


# ifdef  __cplusplus
}
# endif


#endif /* ssl_hash_h */

#include "ssl_hash.h"
#include "openssl/sha.h"

int ssl_sha256(const char *in_data,int in_len,char *out_hash)
{
    if (!in_data) {
        return -100;
    }
    
    if (!SHA256((const unsigned char *)in_data, in_len, (unsigned char *)out_hash)) {
        return -1001;
    }
    return 1;
}

#Android.mk文件

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
#编码后生成的.a的名称
LOCAL_MODULE    := sslhash 
#要编码的源文件c或cpp
LOCAL_SRC_FILES := ssl_hash.c
#依赖的静态库.a，若要使用动态库使用LOCAL_SHARED_LIBRARIES .so
LOCAL_STATIC_LIBRARIES := libs/${TARGET_ARCH_ABI}/lib/libssl.a libs/${TARGET_ARCH_ABI}/lib/libcrypto.a
#依赖的静态库的头文件
LOCAL_C_INCLUDES := libs/${TARGET_ARCH_ABI}/include
#最后生成静态库
include $(BUILD_STATIC_LIBRARY)

#Application.mk 这里测试，只编译出x86的

APP_ABI := x86

~/Library/Android/sdk/ndk-bundle/ndk-build NDK_PROJECT_PATH=./ NDK_LIBS_OUT=./ APP_BUILD_SCRIPT=./Android.mk NDK_APPLICATION_MK=./Application.mk

    externalNativeBuild {
        cmake {
            path "CMakeLists.txt"
        }
    }

    sourceSets {
        main {
            jniLibs.srcDirs = [‘libs‘]
        }
    }

externalNativeBuild {
            cmake {
                cppFlags ""
                abiFilters "x86"
            }
        }

        ndk{
            abiFilters "x86"
        }

cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
#这里配置指定目录libs
set(OpenSSL_DIR ${CMAKE_SOURCE_DIR}/libs)

# 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.

#这里引用三个静态.a, ssl,sslhash,crypto
add_library(crypto STATIC IMPORTED)
add_library(ssl STATIC IMPORTED)
add_library(sslhash STATIC IMPORTED)


# 这里加载，并且找到相应的 libxxx.a
set_target_properties( # Specifies the target library.
                       crypto

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${OpenSSL_DIR}/${ANDROID_ABI}/lib/libcrypto.a )

set_target_properties( # Specifies the target library.
                       ssl

                       # Specifies the parameter you want to define.
                       PROPERTIES IMPORTED_LOCATION

                       # Provides the path to the library you want to import.
                       ${OpenSSL_DIR}/${ANDROID_ABI}/lib/libssl.a )

 set_target_properties( # Specifies the target library.
                        sslhash

                        # Specifies the parameter you want to define.
                        PROPERTIES IMPORTED_LOCATION

                        # Provides the path to the library you want to import.
                        ${OpenSSL_DIR}/${ANDROID_ABI}/lib/libsslhash.a)

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.

#这里openssl需要 zlib库，加载系统的
find_library( z-lib z )

#这里指定一下咱的头文件目录，openssl头文件，以及咱封装的ssl_hash.h头文件
include_directories( ${OpenSSL_DIR}/${ANDROID_ABI}/include
                     ${OpenSSL_DIR}/${ANDROID_ABI}/
)

#最后一步连接，这里注意，一定要把sslhash,咱封装的这个.a放到ssl,crypto的前面，不然报错说方法未定义，可能因为sslhash引用了openssl的东西，
target_link_libraries( # Specifies the target library.
                       native-lib

                       # Links the target library to the log library
                       # included in the NDK.
                        sslhash
                        ssl
                        crypto
                        ${log-lib}
                        ${z-lib})

    public native String stringFromJNI();

    //添加的测试方法
    public native int sslsha(byte[] indata,int inlen,byte[] outhash);

#include "ssl_hash.h"


extern "C"
JNIEXPORT jint JNICALL
Java_androidapp_cocoajin_com_tjni_MainActivity_sslsha(JNIEnv *env, jobject instance,
                                                      jbyteArray indata_, jint inlen,
                                                      jbyteArray outhash_) {
    jbyte *indata = env->GetByteArrayElements(indata_, NULL);
    jbyte *outhash = env->GetByteArrayElements(outhash_, NULL);

    int ret = ssl_sha256((const char *)indata,inlen,(char *)outhash);

    env->ReleaseByteArrayElements(indata_, indata, 0);
    env->ReleaseByteArrayElements(outhash_, outhash, 0);

    return ret;
}

//默认系统的
extern "C"
JNIEXPORT jstring JNICALL
Java_androidapp_cocoajin_com_tjni_MainActivity_stringFromJNI(
        JNIEnv *env,
        jobject /* this */) {
    std::string hello = "Hello from C++";
    return env->NewStringUTF(hello.c_str());
}

        // Example of a call to a native method
        TextView tv = (TextView) findViewById(R.id.sample_text);

        String he = "hello";
        byte[] habb = new byte[32];
        sslsha(he.getBytes(),he.length(),habb);

        tv.setText(ByteHexUtil.bytesToHexString(habb));