SIMLock锁卡功能解析

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SIMLock锁卡功能解析

SIMLock锁卡功能解析 - 桀骜不驯24 - 博客园

一、锁卡背景介绍

　　锁卡即SIMLock,当手机开机启动或者插入SIM卡时，手机modem侧预置在NV项中的配置信息会与SIM卡中的信息做比对，检测是否匹配。若匹配，则SIM卡可以正常使用。若不匹配，则SIM卡相关功能均无法正常使用，例如拨打电话、发送短信及上网等；或者是只能注册2G网，不能注册4G。

　　锁卡的目的：一些运营商会要求控制某一类卡的使用，从而保护自己的利益（运营商定制机）

　　SIMLock锁和图案锁，数字密码锁，PIN码锁，PUK锁一样，是Keyguard模块中的一种锁。

二、锁卡的需求

　　锁卡的需求方式有7种之多，常见的有NP锁，NS锁，CP锁，SP锁等

　　从安卓机器来看，目前最常用的是SP锁（MCC/MNC），本文将解析SP锁的加锁流程

三、锁卡流程解析

　　1.首先modem侧检测SIM卡的配置信息并与之作比对，若匹配则继续加载SIM卡，若不匹配，则上报加锁信息

　　2.RIL层检测到modem上报的加锁信息，然后发送给framework层，最终在AP层监测到事件：

　　3.AP层显示出锁卡界面，要求用户输入解锁码进行解锁

四、相关流程图

1.加锁流程图

2.解锁流程图

五、代码解析

　　MTK平台已经支持SIMLock功能，但只能在代码中写固定的MCC/MNC，不能灵活配置。即一套代码只能对应一套对应的锁卡配置信息，对于手机厂商来说，显然不满足需求，发货国家遍布全球，锁卡配置信息均不同，代码版本太多无法管理，故肯定要废弃MTK的这套SIMLock功能。

（1）modem侧客制化

　　涉及的代码文件：

 

  1.  
    custom/modem/common/ps/custom_nvram_extra.c
     
  2.  
    custom/modem/common/ps/customer_at_command.c
     
  3.  
    custom/service/nvram/custom_nvram_sec.c
     
  4.  
    custom/service/nvram/custom_nvram_sec.h
     
  5.  
    interface/service/nvram/nvram_data_items.h
     
  6.  
    service/nvram/src/nvram_factory_config.c
     
  7.  
    service/nvram/src/nvram_main.c
     


 

a.扩展锁卡配置信息的组数
 

　　custom_nvram_sec.h
 

　　#define SML_MAX_SUPPORT_CAT_N       50
 　　初始化数组的时候，需要添加对应的默认配置信息
 

 

  •  
    const nvram_sml_context_struct NVRAM_EF_SML_DEFAULT = 
     
  •  
     SML_MAGIC_HEAD_VALUE, 
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_N_CAT,0,0, /* Category N */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_NS_CAT ,0,0, /* Category NS */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_SP_CAT ,0,0, /* Category SP */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_C_CAT ,0,0, /* Category C */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_SIM_CAT ,0,0, /* Category SIM */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_NS_CAT ,0,0, /* Link NS-SP */
     
  •  
    SML_STATE_UNLOCK,SML_RETRY_COUNT_C_CAT ,0,0, /* Link SIM-C */
     
  •  
    SML_KEY_SET,0x21,0x43,0x65,0x87,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_SET,0x65,0x87,0x21,0x43,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_SET,0x11,0x22,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_EMPTY,0x33,0x44,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_EMPTY,0x55,0x66,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_SET,0x77,0x88,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    SML_KEY_SET,0x99,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    /* Category N code */
     
  •  
    0x73,0x00,0x1F,0x73,0x00,0x2F,0x73,0x00,0x3F,0x73,0x00,0x4F,0x73,0x00,0x5F,
     
  •  
    0x73,0x00,0x6F,0x73,0x00,0x7F,0x73,0x00,0x8F,0x73,0x00,0x9F,0x73,0x01,0x0F,
     
  •  
    0x73,0x01,0x1F,0x73,0x09,0x9F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,
     
  •  
    /* Category NS code */
     
  •  
    0xc2,0xc2,0xc2,0xc2,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,
     
  •  
    /* Category SP code */
     
  •  
    0xc3,0xc3,0xc3,0xc3,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,
     
  •  
    /* Category C code */
     
  •  
    0xc4,0xc4,0xc4,0xc4,0xc4,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,
     
  •  
    /* Category SIM code */
     
  •  
    0xc5,0xc5,0xc5,0xc5,0xc5,0xc5,0xc5,0xc5,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
     
  •  
    /* Link Category NS-SP */
     
  •  
    0xc6,0xc6,0xc6,0xc6,0xc6,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00, 
     
  •  
    /* Link Category SIM-C */
     
  •  
    0xc7,0xc7,0xc7,0xc7,0xc7,0xc7,0xc7,0xc7,0xc7,0xc7,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
     
  •  
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
     
  •  
    0xFF,0xFF,
     
  •  
    SML_MAGIC_TAIL_VALUE 
     
  •  
    ;
     
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