Android直接执行so里的函数

#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>

int main(int argc, char *argv[])
{
    //decrypt_db in.db out.db key

	//char key_in[256] = "thMSot/QNM/iFsDVNksPtXHiqi0wxjD0m2SMLipLEQ4=";
    char *in_db = argv[1];
    char *out_db = argv[2];

    char *key_in = argv[3];
	char key_out[256] = {0};

	void *p;
    void (*key_func)(char *, char *);
    void (*decrypt)(char *, char *, char *);

    //dlopen
    p=dlopen("./libdatabase_sqlcrypto.so",RTLD_NOW);
    if(p==NULL)
    {
        printf("dlopen error!\n");
        exit(0);
    }
    else
        printf("dlopen ok!\n");

    //dlsym aes_decrypt_key128
    key_func=dlsym(p, "aes_decrypt_key128");
    key_func(key_in, key_out);
    //printf("key_in:%s\n", key_in);
    //printf("key_out:%s\n", key_out);

    char cipher[16] = {0};
    char plain[16] = {0};

    //read cipher
    FILE *fp_read;
	fp_read = fopen(in_db, "rb");
	FILE *fp_write;
	fp_write = fopen(out_db, "wb");

	//dlsym aes_decrypt
	decrypt=dlsym(p, "aes_decrypt");

	while(fread(cipher, 1, 16, (FILE*)fp_read) == 16) //read cipher
	{
	    //decrypt
	    decrypt(cipher, plain, key_out);

	    //write plain
		fwrite(plain, 1, 16, (FILE*)fp_write);
	}

	fclose(fp_read);
	fclose(fp_write);
    dlclose(p);
}