Linux Kernel(Android) 密碼編譯演算法總結（四）-應用程式調用OpenSSL密碼編譯演算法

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Linux Kernel(Android) 密碼編譯演算法總結（三）-應用程式調用核心密碼編譯演算法介面

講到了如何調用核心中的介面的方法。

本節主要是介紹如何Android C/C++應用程式調用Openssl的AES密碼編譯演算法。

crypt_ssl.c

#include <stdio.h>#include <string.h>#include <unistd.h>#include <fcntl.h>#include <aes.h>#include <sys/socket.h>#include <linux/if_alg.h>#include <evp.h>#include <stdio.h>#include <stdlib.h>#ifndef AF_ALG    #define AF_ALG 38    #define SOL_ALG 279#endif#define BUF_SIZE 16static void crypt_ssl(char *in, int inlen, char *out,const char *key, char *iv){    AES_KEY akey;    AES_set_encrypt_key(key, 128, &akey);    AES_cbc_encrypt(in, out, inlen, &akey, iv, 1);}int main(int argc, char **argv){    int i;    char out[BUF_SIZE] = {0};    char in[BUF_SIZE] = "Single block msg";    const char key[16] =    "x06xa9x21x40x36xb8xa1x5b"    "x51x2ex03xd5x34x12x00x06";    char iv[16] =    "x3dxafxbax42x9dx9exb4x30"    "xb4x22xdax80x2cx9fxacx41";    if(argc != 2)    {        printf("usage:compare openssl / compare kernel \n");    }    if(strncmp(argv[1], "openssl", 7) == 0)    {        printf("encrypt by openssl...n");        crypt_ssl(in, BUF_SIZE, out, key, iv);    }    for (i = 0; i < BUF_SIZE; i )        printf("0x", (unsigned char)out[i]);    printf("n");    return 0;} 

在Android 原始碼編譯檔案：

Android.mk

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := myencryptLOCAL_MODULE_TAGS := optionalLOCAL_SRC_FILES :=     crypt_ssl.cLOCAL_SHARED_LIBRARIES :=     libdl      liblog     libcryptoLOCAL_C_INCLUDES :=     external/openssl/include/openssl     external/openssl/includeinclude $(BUILD_EXECUTABLE)

編譯完成後在

adb push testhash /system/bin/

adb shell chmod a+x /system/bin/testhash

adb shell testhash

驗證輸出結果.

Linux Kernel(Android) 密碼編譯演算法總結（四）-應用程式調用OpenSSL密碼編譯演算法