Android NDK 使用MD5+签名校验加密Token

cpp

• MD5.cpp

#include "MD5.h"

using namespace std;

/* Constants for MD5Transform routine. */
#define S11 7
#define S12 12
#define S13 17
#define S14 22
#define S21 5
#define S22 9
#define S23 14
#define S24 20
#define S31 4
#define S32 11
#define S33 16
#define S34 23
#define S41 6
#define S42 10
#define S43 15
#define S44 21


/* F, G, H and I are basic MD5 functions.
*/
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))

/* ROTATE_LEFT rotates x left n bits.
*/
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))

/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
Rotation is separate from addition to prevent recomputation.
*/
#define FF(a, b, c, d, x, s, ac) { \
	(a) += F((b), (c), (d)) + (x)+ac; \
	(a) = ROTATE_LEFT((a), (s)); \
	(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
	(a) += G((b), (c), (d)) + (x)+ac; \
	(a) = ROTATE_LEFT((a), (s)); \
	(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
	(a) += H((b), (c), (d)) + (x)+ac; \
	(a) = ROTATE_LEFT((a), (s)); \
	(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
	(a) += I((b), (c), (d)) + (x)+ac; \
	(a) = ROTATE_LEFT((a), (s)); \
	(a) += (b); \
}


const byte MD5::PADDING[64] = { 0x80 };
const char MD5::HEX[16] = {
	'0', '1', '2', '3',
	'4', '5', '6', '7',
	'8', '9', 'a', 'b',
	'c', 'd', 'e', 'f'
};


/* Default construct. */
MD5::MD5() {
	reset();
}

/* Construct a MD5 object with a input buffer. */
MD5::MD5(const void* input, size_t length) {
	reset();
	update(input, length);
}

/* Construct a MD5 object with a string. */
MD5::MD5(const string& str) {
	reset();
	update(str);
}

/* Construct a MD5 object with a file. */
MD5::MD5(ifstream& in) {
	reset();
	update(in);
}

/* Return the message-digest */
byte* MD5::digest() {

	if (!_finished) {
		_finished = true;
		final();
	}
	return _digest;
}

/* Reset the calculate state */
void MD5::reset() {

	_finished = false;
	/* reset number of bits. */
	_count[0] = _count[1] = 0;
	/* Load magic initialization constants. */
	_state[0] = 0x67452301;
	_state[1] = 0xefcdab89;
	_state[2] = 0x98badcfe;
	_state[3] = 0x10325476;
}

/* Updating the context with a input buffer. */
void MD5::update(const void* input, size_t length) {
	update((const byte*)input, length);
}

/* Updating the context with a string. */
void MD5::update(const string& str) {
	update((const byte*)str.c_str(), str.length());
}

/* Updating the context with a file. */
void MD5::update(ifstream& in) {

	if (!in) {
		return;
	}

	std::streamsize length;
	char buffer[BUFFER_SIZE];
	while (!in.eof()) {
		in.read(buffer, BUFFER_SIZE);
		length = in.gcount();
		if (length > 0) {
			update(buffer, length);
		}
	}
	in.close();
}

/* MD5 block update operation. Continues an MD5 message-digest
operation, processing another message block, and updating the
context.
*/
void MD5::update(const byte* input, size_t length) {

	uint32 i, index, partLen;

	_finished = false;

	/* Compute number of bytes mod 64 */
	index = (uint32)((_count[0] >> 3) & 0x3f);

	/* update number of bits */
	if ((_count[0] += ((uint32)length << 3)) < ((uint32)length << 3)) {
		++_count[1];
	}
	_count[1] += ((uint32)length >> 29);

	partLen = 64 - index;

	/* transform as many times as possible. */
	if (length >= partLen) {

		memcpy(&_buffer[index], input, partLen);
		transform(_buffer);

		for (i = partLen; i + 63 < length; i += 64) {
			transform(&input[i]);
		}
		index = 0;

	}
	else {
		i = 0;
	}

	/* Buffer remaining input */
	memcpy(&_buffer[index], &input[i], length - i);
}

/* MD5 finalization. Ends an MD5 message-_digest operation, writing the
the message _digest and zeroizing the context.
*/
void MD5::final() {

	byte bits[8];
	uint32 oldState[4];
	uint32 oldCount[2];
	uint32 index, padLen;

	/* Save current state and count. */
	memcpy(oldState, _state, 16);
	memcpy(oldCount, _count, 8);

	/* Save number of bits */
	encode(_count, bits, 8);

	/* Pad out to 56 mod 64. */
	index = (uint32)((_count[0] >> 3) & 0x3f);
	padLen = (index < 56) ? (56 - index) : (120 - index);
	update(PADDING, padLen);

	/* Append length (before padding) */
	update(bits, 8);

	/* Store state in digest */
	encode(_state, _digest, 16);

	/* Restore current state and count. */
	memcpy(_state, oldState, 16);
	memcpy(_count, oldCount, 8);
}

/* MD5 basic transformation. Transforms _state based on block. */
void MD5::transform(const byte block[64]) {

	uint32 a = _state[0], b = _state[1], c = _state[2], d = _state[3], x[16];

	decode(block, x, 64);

	/* Round 1 */
	FF(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
	FF(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
	FF(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
	FF(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
	FF(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
	FF(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
	FF(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
	FF(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
	FF(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
	FF(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
	FF(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
	FF(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
	FF(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
	FF(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
	FF(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
	FF(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */

	/* Round 2 */
	GG(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
	GG(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
	GG(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
	GG(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
	GG(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
	GG(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
	GG(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
	GG(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
	GG(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
	GG(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
	GG(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
	GG(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
	GG(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
	GG(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
	GG(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
	GG(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */

	/* Round 3 */
	HH(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
	HH(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
	HH(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
	HH(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
	HH(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
	HH(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
	HH(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
	HH(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
	HH(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
	HH(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
	HH(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
	HH(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
	HH(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
	HH(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
	HH(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
	HH(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */

	/* Round 4 */
	II(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
	II(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
	II(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
	II(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
	II(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
	II(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
	II(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
	II(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
	II(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
	II(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
	II(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
	II(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
	II(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
	II(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
	II(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
	II(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */

	_state[0] += a;
	_state[1] += b;
	_state[2] += c;
	_state[3] += d;
}

/* Encodes input (ulong) into output (byte). Assumes length is
a multiple of 4.
*/
void MD5::encode(const uint32* input, byte* output, size_t length) {

	for (size_t i = 0, j = 0; j < length; ++i, j += 4) {
		output[j] = (byte)(input[i] & 0xff);
		output[j + 1] = (byte)((input[i] >> 8) & 0xff);
		output[j + 2] = (byte)((input[i] >> 16) & 0xff);
		output[j + 3] = (byte)((input[i] >> 24) & 0xff);
	}
}

/* Decodes input (byte) into output (ulong). Assumes length is
a multiple of 4.
*/
void MD5::decode(const byte* input, uint32* output, size_t length) {

	for (size_t i = 0, j = 0; j < length; ++i, j += 4) {
		output[i] = ((uint32)input[j]) | (((uint32)input[j + 1]) << 8) |
			(((uint32)input[j + 2]) << 16) | (((uint32)input[j + 3]) << 24);
	}
}

/* Convert byte array to hex string. */
string MD5::bytesToHexString(byte* input, size_t length) {

	string str;
	str.reserve(length << 1);
	for (size_t i = 0; i < length; ++i) {
		int t = input[i];
		int a = t / 16;
		int b = t % 16;
		str.append(1, HEX[a]);
		str.append(1, HEX[b]);
	}
	return str;
}

/* Convert digest to string value */
string MD5::toString() {
	return bytesToHexString(digest(), 16);

}

• MD5.h

#ifndef MD5_H
#define MD5_H

#include <string>
#include <fstream>

/* Type define */
typedef unsigned char byte;
typedef unsigned int uint32;

using std::string;
using std::ifstream;

/* MD5 declaration. */
class MD5 {
public:
	MD5();
	MD5(const void* input, size_t length);
	MD5(const string& str);
	MD5(ifstream& in);
	void update(const void* input, size_t length);
	void update(const string& str);
	void update(ifstream& in);
	byte* digest();
	string toString();
	void reset();

private:
	void update(const byte* input, size_t length);
	void final();
	void transform(const byte block[64]);
	void encode(const uint32* input, byte* output, size_t length);
	void decode(const byte* input, uint32* output, size_t length);
public:
	string bytesToHexString(byte* input, size_t length);

	/* class uncopyable */
	MD5(const MD5&);
	MD5& operator=(const MD5&);

private:
	uint32 _state[4]; /* state (ABCD) */
	uint32 _count[2]; /* number of bits, modulo 2^64 (low-order word first) */
	byte _buffer[64]; /* input buffer */
	byte _digest[16]; /* message digest */
	bool _finished;   /* calculate finished ? */

	static const byte PADDING[64]; /* padding for calculate */
	static const char HEX[16];
	enum { BUFFER_SIZE = 1024 };
};

#endif /*MD5_H*/

• native-lib.cpp

#include <jni.h>
#include <string>
#include <iostream>
#include <android/log.h>
#include "MD5.h"

#define LOG_TAG "TAG_C"
#define LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)

using namespace std;

// 预设的包名
static const char *PACKAGE_NAME = "com.package.xxx";
// 预设的签名MD5值
static const char *APP_SIGNATURE_MD5 = "e0cc175b9c0f1b6a831c399e269772661";
// 预设的签名
const char *APP_SIGNATURE = "f70d01010105000382010f003082010a02820101008c0d4146f43b2d21546818dffa";

extern "C"
JNIEXPORT jstring JNICALL
Java_com_packet_1xxx_EncryptionUtil_encryptionMD5(JNIEnv *env, jclass clazz, jobject context,
                                                      jstring input, jint result_type) {
    // TODO: implement encryptionMD5()
    if (!context) {   // 上下文判空
        return env->NewStringUTF("error content");
    }

    if (!context) { // 字符串判空
        return env->NewStringUTF("error input string");
    }

    // region ----------------------- 包名校验 -----------------------

    // 获取上下文的 Class
    jclass j_context_clz = env->GetObjectClass(context);
    // 获取 getPackageName 方法的方法签名
    jmethodID j_mid = env->GetMethodID(j_context_clz, "getPackageName", "()Ljava/lang/String;");
    // 获取包名
    jstring j_package_name = static_cast<jstring>(env->CallObjectMethod(context, j_mid));
    const char *c_package_name = env->GetStringUTFChars(j_package_name, NULL);
    LOGD("input package name --> %s ", c_package_name);
    if (strcmp(c_package_name, PACKAGE_NAME) != 0) {    // 包名不一致直接返回
        return env->NewStringUTF("error_package");
    }

    // endregion -----------------------------------------------------

    // region ----------------------- 签名校验 -----------------------

    // 获取方法签名
    j_mid = env->GetMethodID(j_context_clz, "getPackageManager",
                             "()Landroid/content/pm/PackageManager;");
    // PackageManager
    jobject j_package_manager = env->CallObjectMethod(context, j_mid);
    // 获取PackageInfo
    jclass j_package_manager_clz = env->GetObjectClass(j_package_manager);
    j_mid = env->GetMethodID(j_package_manager_clz, "getPackageInfo",
                             "(Ljava/lang/String;I)Landroid/content/pm/PackageInfo;");
    // 获取 PackageInfo 对象
    jobject j_package_info = env->CallObjectMethod(j_package_manager, j_mid, j_package_name,
                                                   0x00000040);
    //获取签名数组
    clazz = env->GetObjectClass(j_package_info);
    jfieldID j_signature_id = env->GetFieldID(clazz, "signatures",
                                              "[Landroid/content/pm/Signature;");
    jobjectArray signature_array = static_cast<jobjectArray>(env->GetObjectField(j_package_info,
                                                                                 j_signature_id));
    // 获取数组的第一个元素
    jobject signature_first = env->GetObjectArrayElement(signature_array, 0);

    clazz = env->GetObjectClass(signature_first);
    j_mid = env->GetMethodID(clazz, "toCharsString", "()Ljava/lang/String;");
    jstring j_signature = static_cast<jstring>(env->CallObjectMethod(signature_first, j_mid));
    const char *c_signature = env->GetStringUTFChars(j_signature, NULL);
//    LOGD("input signature1 = %s", c_signature);

    if (strncmp(c_signature, APP_SIGNATURE, strlen(APP_SIGNATURE)) != 0) {  // 签名不一致
        return env->NewStringUTF("error_signature");
    }

    // endregion -----------------------------------------------------

    // 获取需要加密的数据
    const char *c_input = env->GetStringUTFChars(input, NULL);
//    LOGD("c_input --> %s ", c_input);
	//加盐
    char *k = "!1@$%2t5&";
    std::string const& cc = std::string(c_input) + std::string(k);
    char const *c = cc.c_str();

    // 此处可以对需要加密的数据进行加密前的处理，增加破解难度
//    LOGD("sn --> %s ", c);
    MD5 md5_input;
    md5_input.update(c);
    string result = md5_input.bytesToHexString(md5_input.digest(), 16);

    if (result_type == 1) {
        // 转大写
        transform(result.begin(), result.end(), result.begin(), ::toupper);
    }

    return env->NewStringUTF(result.c_str());
}

• CMakeLists.txt

# 指定 cmake 的最小版本
cmake_minimum_required(VERSION 3.4.1)

# 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).
        native-lib.cpp
        MD5.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.

target_link_libraries( # Specifies the target library.
        native-lib

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

java

• EncryptionUtil.java

package com.package.xxx;

import android.content.Context;

public class EncryptionUtil {

    static {
        System.loadLibrary("native-lib");
    }

    /**
     * 签名校验+MD5加密
     *
     * @param context    签名校验
     * @param input      需要加密的数据
     * @param resultType 加密的输出类型 0: 默认 1: 大写
     * @return
     */
    public static native String encryptionMD5(Context context, String input, int resultType);

}

• MainActivity.java

package com.package.xxx;

import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Log.e("TAG1", "-->" + AppUtil.getSign(this, getPackageName()));
        Log.e("TAG2", "-->" + AppUtil.getSignMD5(this, getPackageName()));
        Log.e("TAG3", "==>" + EncryptionUtil.encryptionMD5(this, "a=zs&bl=18&63644", 0));

    }
	//test
    public void encryptionMD5(View view) {
        Log.e("TAG4", "------>" + EncryptionUtil.encryptionMD5(this, "abc", 0));
    }

}

• AppUtil.java

package com.package.xxx;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class AppUtil {

    /**
     * 获取应用签名
     *
     * @param context
     * @param packageName
     * @return
     */
    public static String getSign(Context context, String packageName) {
        try {
            PackageInfo info = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
            byte[] bytes = info.signatures[0].toByteArray();
            return byte2hex(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

    /**
     * 获取签名的MD5值
     *
     * @param context
     * @param packageName
     * @return
     */
    public static String getSignMD5(Context context, String packageName) {
        try {
            PackageInfo info = context.getPackageManager().getPackageInfo(packageName, PackageManager.GET_SIGNATURES);
            byte[] bytes = info.signatures[0].toByteArray();
            return encryptionMD5(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }

    private static String encryptionMD5(byte[] byteStr) {
        MessageDigest messageDigest = null;
        StringBuffer md5StrBuff = new StringBuffer();
        try {
            messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.reset();
            messageDigest.update(byteStr);
            byte[] byteArray = messageDigest.digest();
            for (int i = 0; i < byteArray.length; i++) {
                if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
                    md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
                } else {
                    md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
                }
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return md5StrBuff.toString();
    }

    private static String byte2hex(byte[] bytes) {
        String hs = "";
        String tmp = "";
        for (int i = 0; i < bytes.length; i++) {
            tmp = (Integer.toHexString(bytes[i] & 0XFF));
            if (tmp.length() == 1)
                hs = hs + "0" + tmp;
            else
                hs = hs + tmp;
        }
        return hs.toUpperCase();
    }

}

• layout下activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <Button
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:onClick="encryptionMD5"
        android:text="MD5加密" />

</LinearLayout>

• AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.package.xxx">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

• app包下的build.gradle

apply plugin: 'com.android.application'

android {
    ndkVersion '23.1.7779620'
    compileSdkVersion 29
    buildToolsVersion "29.0.2"
    defaultConfig {
        applicationId "com.package.xxx"
        minSdkVersion 15
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        externalNativeBuild {
            cmake {
                cppFlags ""
            }
        }
    }

    // 配置打包签名信息
    signingConfigs {
        release {
            keyAlias "test"
            keyPassword "123123"
            storeFile file("../ndk_md5.jks")//密钥
            storePassword "123123"
        }

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            // 配置签名信息
            signingConfig signingConfigs.release
        }

        debug {
            // 配置签名信息
            signingConfig signingConfigs.release
        }

    }
    externalNativeBuild {
        cmake {
            path "src/main/cpp/CMakeLists.txt"
            version "3.10.2"
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.appcompat:appcompat:1.0.2'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
}

• project包下的build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        google()
        jcenter()
        
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.0.1'
        
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}