进一步有进一步惊喜

void printData(uint8_t *data,int32_t len){
    int j = 1;
    for (int i=0;i<len;i++){
        printf("%2x ",(uint8_t)data[i]);
        if(j % 16 == 0){
            printf("\n");
        }
        j++;
    }
}
// 加密数据
void encryptConfigFile(){
    char *filename = "./long_plain.txt";
    char content[1024*10];
    char encrypt[1024*10];
    size_t filesize;
    FILE *fp = fopen(filename,"r");
    filesize = fread(content,1,1024*10,fp);
    content[filesize] = '\0';
    printf("\n=========================\n");
    printf("file content:\n%s",content);
    printf("\n=========================\n");
    printf("\n 文件大小: %lu %lu\n",filesize,strlen(content));
    printf("\n==============从文件读取到的数据===================\n");
    printData(content,filesize);
    printf("\n================================================\n");
    // 加密数据
    uint8_t *dataforencrypt = (uint8_t *)calloc(1,strlen(content)+AES_BLOCK_SIZE);
    if (NULL == dataforencrypt){
        dbg("无法分配内存");
        return;
    }
    memcpy(dataforencrypt,content,strlen(content));
    size_t padding_len = strlen(content);
    pkcs5padding((uint8_t * const)dataforencrypt,(size_t * const)&padding_len,AES_BLOCK_SIZE);
    size_t encrypt_len = 0;
    char key[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
    char iv[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};

    if (!aes_cbc_encrypt(dataforencrypt,padding_len,encrypt,&encrypt_len,key,sizeof(key),iv,sizeof(iv))){
        dbg("加密失败");
    }
    fclose(fp);
    printf("\n================加密后数据==========\n");
    printData(encrypt,encrypt_len);
    printf("\n===================================\n");

    fp = fopen("long_encrypt.txt","w+");
    // 第一个字节写入2,后面是加密数据。然后写入文件
    uint8_t *write_data = NULL;
    write_data = calloc(1,encrypt_len+1);
    write_data[0] = 2;
    uint8_t *tmp = &write_data[1];
    memcpy(tmp,encrypt,encrypt_len);
    fwrite(write_data,encrypt_len+1,1,fp);
    printf("\n===============写入文件数据==============\n");
    printData(write_data,encrypt_len+1);
    printf("\n===========================================\n");
    printf("\n");
    printf("加密写入文件成功\n");
    fclose(fp);
    free(write_data);
}
// 解密文件
void decryptConfigFile(){
    char *filename = "./long_encrypt.txt";
    uint8_t content[10*1024];
    size_t  filesize;
    FILE *fp = fopen(filename,"r");
    filesize = fread(content,1,1024*10,fp);
    // 取出第一个字节，
    uint8_t version = content[0];
    printf("version = %d\n",version);
    printf("\n=============读取到文件内容=============\n");
    printData(content,filesize);
    printf("\n========================================\n");
    // 获得待解密的数据
    uint8_t *decrypt_data = NULL;
    uint8_t *tmp = &content[1];
    decrypt_data = calloc(1,filesize-1);
    // 读出后面的数据
    memcpy(decrypt_data,tmp,filesize-1);
    char key[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
    char iv[] = {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f};
    //
    printf("\n=========待解密数据============\n");
    printData(decrypt_data,filesize-1);
    printf("\n==============================\n");
    // 解密
    uint8_t decrypt[10*1024];
    size_t decrypt_len;
    if (!aes_cbc_decrypt(decrypt_data,filesize-1,decrypt,&decrypt_len,key,sizeof(key),iv,sizeof(iv))){
        dbg("解密失败\n");
        return;
    }
    dbg("\n===========解密后的数据================\n");
    printData(decrypt,decrypt_len);
    printf("\n====================================\n");
   	pkcs5unpadding(decrypt,&decrypt_len);
    printf("\n===========unpadding之后的数据==========================\n");
    printData(decrypt,decrypt_len);
    printf("\n===============================================\n");

    decrypt[decrypt_len] = '\0';
    printf("解密后数据:\n%s\n",decrypt);
    fclose(fp);
    fp = fopen("long_decrypt.txt","w+");
    fwrite(decrypt,decrypt_len,1,fp);
    fclose(fp);
    printf("\n解密后数据写入文件成功\n");
}