Linux Kernel(Android) 加密算法总结(三)-应用程序调用内核加密算法接口
讲到了如何调用内核中的接口的方法。
本节主要是介绍如何Android C/C++应用程序调用Openssl的AES加密算法。
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 16 static 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 源代码编译文件:
Android.mk
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := myencrypt LOCAL_MODULE_TAGS := optional LOCAL_SRC_FILES := crypt_ssl.c LOCAL_SHARED_LIBRARIES := libdl liblog libcrypto LOCAL_C_INCLUDES := external/openssl/include/openssl external/openssl/include include $(BUILD_EXECUTABLE)
编译完成后在
adb push testhash /system/bin/
adb shell chmod a+x /system/bin/testhash
adb shell testhash
验证输出结果.
时间: 2024-11-05 03:40:55