【技术】瑞萨RL78系列MCU软件加密机制解析
瑞萨RL78系列 MCU ,整合了NEC的MCU 78K和R8C系列的高级特性,实现了低功耗和高性能。RL78基于16位CISC架构,集成丰富的的模拟资源,可面向通用控制器,LCD控制器,汽车控制器等各个应用领域。让用户能够以更低的成本构建小型、高能效系统。
为了保障用户代码安全,RL78系列MCU提供了加密机制。其工作机理是通过在片内Flash地址000C4H ~ 000CDH处写入特定的加密数值来实现加密,通过OPTION(000C3)位来控制加密等级,如下表所示。
Table 1
下图为10 bytes 的ID加密数据,可写入除0xff以外的任意数据。
图 1:ID数据表格
如何配置加密ID:
配置ID一种简单的方式是通过CS编译器去设定,如下图在build tool界面中,common options可配置需要的ID数据。通过下载或者DEBUG功能下载到MCU中。
图 2:ID配置页面
同一界面在link option中可配置加密等级功能:
图 3:加密等级配置页面
加密的优劣:
由于OPTION以及ID地址在用户Flash地址范围内,在实际使用过程中,工程配置不当或者忘记ID密码而导致E1的DEBUG接口被锁死,此时必须通过烧录接口擦除整片Flash才能继续使用仿真器仿真调试,增加了我们调试的时间。
但在希望使用加密功能时,例如在最终的产品生产烧写时,通过简单的加密ID设置便可以完成MCU的加密操作,保证在ID密码不泄漏的情况下,无法读取MCU 内部FLASH的内容,从而增加软件的安全性。
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狼顾 Lv4. 资深工程师 2018-05-08加密还是很重要的
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心有林夕 Lv4. 资深工程师 2018-01-27学习
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向幸福出发 Lv7. 资深专家 2017-11-17学习
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目录- RL78家族特点 通用型MCU LCD MCU ASSP 智能模拟 汽车 开发环境&开发工具 解决方案 产品一览表 封装
型号- R5F104PFAFA,R5F101PHAFB,R5F104PFAFB,R5F10BAFLSP,R5F101PHAFA,R5F113TJLFB,R5F110MEAFB,R5F10JGCAFB,R5F10AACLSP,R5F10AGCLNA,R5F111MHAFB,R5F10WMGAFA,R5F10WMGAFB,R5F101ACASP,R5F104JHAFA,R5F101JJAFA,R5F104BDANA,R5F101BFANA,R5F10PADLSP,R5F1006EASP,R5F101FDAFP,R5F100LJAFA,R5F100LJAFB,R5F100JGAFA,R5F101LCABG,R5F104CFALA,R5F1018CALA,R5F100BCANA,R5F10Y14ASP,R5F100FLAFP,RL78-S2,R5F100EHANA,R5F11MMDAFB,R5F10PGFLFB,R5F100MKAFB,R5F100MKAFA,R5F100CEALA,R5F10BLELFB,R5F100FAAFP,R5F104AAASP,R5F100SJAFB,RL78/F1X,R5F113GLLFB,R5F10BGFLNA,R5F10WLEAFB,R5F104GCAFB,R5F10KGCANA,R5F10WLEAFA,R5F101GCANA,R5F110PJAFB,R5F11BGEAFB,R5F10369ASP,R5F10BMFLFB,R5F100EGANA,R5F113MKLFB,R5F104LJAFP,R5F100GJANA,R5F10278ANA,R5F100MLAFB,R5F1176AGSP,R5F11FLLANA,R5F100FKAFP,R5F100CFALA,R5F10AGELFB,R5F111NGALA,R5F104LJAFA,R5F104LJAFB,R5F10JBCANA,R5F104LHALA,R5F100MLAFA,R5F101SLAFB,R5F101GFAFB,R5F10ALCLFB,R5F10WLFAFB,R5F104BFAFP,R5F104GDAFB,R5F10WLFAFA,R5F11EF8AFP,R5F10PPHLFB,R5F104GLANA,R5F10BGGLNA,R5F1017AANA,R5F10AADLSP,R5F10RFCAFP,R5F110MFAFB,R5F101LLAFA,R5F104JGAFA,R5F104BCANA,R5F1006DASP,R5F10NLE/G,R5F1008AALA,R5F101FEAFP,R5F110NEALA,R5F100AAASP,R5F104GAANA,R5F10RF8AFP,R5F11EAAASP,R5F100JHAFA,R5F10MPEDFB,R5F100BDANA,R5F104CEALA,R5F104MKAFA,R5F10MPGDFB,R5F104MKAFB,R5F10PGELFB,R5F113GKLNA,R5F11MMEAFB,R5F100GLANA,R5F10367ASP,R5F100MJAFA,R5F100MJAFB,R5F10AGGLFB,R5F117BAGFP,R5F10NPJDFB,R5F100LJABG,R5F100GDAFB,R5F104LLAFB,R5F104LLAFA,R5F104LJALA,R5F100SKAFB,R5F101GDANA,R5F10PPJLFB,R5F101PGAFA,R5F10277ANA,R5F10BAELSP,R5F113TKLFB,R5F101PGAFB,R5F101LEABG,R5F10AGDLNA,R5F100GAANA,R5F10NMJ/G,R5F107AEMSP,RL78/G10,R5F101BEANA,RL78/G11,R5F10PMFLFB,RL78/G12,RL78/G13,RL78/G14,R5F101GGAFB,R5F104BEAFP,R5F104FCAFP,R5F101CGALA,R5F100JFAFA,R5F113TLLFB,R5F101LDABG,R5F10BADLSP,R5F11BLCAFB,RL78/G1A,RL78/G1C,RL78/G1D,RL78/G1E,RL78/G1F,RL78/G1G,RL78/G1H,R5F117GAGFB,R5F10BLFLFB,R5F101AAASP,R5F10PMELFB,R5F101BDANA,R5F10RLAAFB,R5F101FFAFP,R5F10AAELSP,R5F10EGAAFB,R5F100BEANA,R5F101CFALA,R5F104FDAFP,R5F10RLAAFA,R5F10Y16ASP,R5F104CDALA,R5F10368ASP,R5F10PGDLFB,R5F104MLAFB,R5F10BMGLFB,R5F11MMFAFB,R5F100GKANA,R5F104MLAFA,R5F101JKAFA,R5F101LCAFA,R5F11768GSP,R5F101LCAFB,R5F100CGALA,R5F10AGFLFB,R5F111NHALA,R5F101GEANA,R5F110PHAFB,R5F100GCAFB,R5F104LKAFB,RL78/F12,RL78/F13,R5F101SKAFB,R5F11B7CANA,R5F11CBCGNA,RL78/F14,R5F104LKAFA,RL78/F15,R5F100SLAFB,R5F1018DALA,R5F104GEAFB,RL78/G1X,R5F10WLGAFA,R5F10WLGAFB,R5F11BGCAFB,R5F101EHANA,R5F101LFABG,R5F104LHAFP,R5F10FMCAFB,R5F10Y46ASP,R5F11BLEAFB,R5F100LCABG,R5F104BGANA,R5F10AGCLFB,R5F10JGCANA,R5F104JEAFA,R5F110PGAFB,R5F104LHAFB,R5F104LHAFA,R5F100PHAFA,R5F100PHAFB,R5F101GHAFB,R5F104LFALA,R5F10PPFLFB,R5F10268ASP,R5F113TGLFB,R5F10BGCLNA,R5F104FJAFP,R5F100JJAFA,R5F113GLLNA,R5F104MJAFA,R5F100ACASP,R5F104MJAFB,R5F10ABDLNA,R5F102A8ASP,R5F1016EASP,R5F101LEAFB,R5F101LEAFA,R5F101PKAFA,R5F101PKAFB,R5F100FDAFP,R5F111NEALA,R5F10PGFLNA,R5F101FGAFP,R5F100GEAFB,R5F10BGFLFB,R5F101MFAFA,R5F104EFANA,R5F101MFAFB,R5F11MPFAFB,R5F100BFANA,R5F104GKAFB,R5F10E8DALA,R5F10AAALSP,RL78/I1A,RL78/I1B,RL78/I1C,RL78/I1D,R5F101LDAFA,RL78/I1E,R5F104ACASP,R5F101LDAFB,R5F101JLAFA,R5F101GFANA,R5F101EGANA,R5F11MPEAFB,R5F104GLAFB,R5F104GAAFB,R5F104LGAFP,R5F10RBAAFP,R5F10WLCAFA,R5F10WLCAFB,R5F111MEAFB,R5F10PGHLFB,R5F113LLLFB,R5F101BCANA,R5F104LGAFB,R5F107ACMSP,R5F104BFANA,R5F10WMDAFB,R5F11CBCMNA,R5F100FCAFP,R5F104LGAFA,R5F10WMDAFA,R5F100PGAFA,R5F100SHAFB,R5F104LEALA,R5F100PGAFB,R5F10PPELFB,R5F101CEALA,R5F10BGDLNA,R5F113THLFB,RL78/I1X,R5F100ADASP,R5F10ABELNA,R5F10WLDAFB,RL78/L1A,R5F100GDANA,R5F11FLJANA,R5F101LFAFB,RL78/L1C,R5F100FEAFP,R5F100EAANA,R5F101LFAFA,R5F10PGELNA,R5F101FHAFP,R5F10BGGLFB,R5F117BAGNA,R5F101CDALA,R5F11MPGAFB,R5F10RLCAFA,R5F104EGANA,R5F10RLCAFB,R5F10WLDAFA,R5F100BGANA,R5F11EFAAFP,R5F100LKAFA,R5F11EA8ASP,R5F111MGAFB,R5F104GJANA,R5F10AGDLFB,R5F10EGCAFB,R5F10WMFAFA,R5F10WMFAFB,RL78/L1E,R5F10MMEDFB,R5F10BLDLFB,R5F111NFALA,R5F101GGANA,R5F11BCEALA,R5F104LGALA,R5F1007EANA,R5F10267ASP,R5F100LKAFB,R5F110PFAFB,R5F104CGALA,R5F10BMELFB,R5F10PPGLFB,RL78/L1X,R5F101EFANA,R5F10PAELSP,R5F100LLAFB,R5F10AGALNA,R5F10PGGLFB,R5F111MFAFB,R5F100LLAFA,R5F104EHANA,R5F104GKANA,R5F102A9ASP,R5F113LKLFB,RY7011A0000DZ00,R5F10EGDAFB,R5F101PJAFA,R5F101PJAFB,R5F10A6ALSP,R5F10KBCAFP,R5F10WMEAFA,R5F104JFAFA,R5F10BLCLFB,R5F117BCGFP,R5F104BEANA,R5F1006CASP,R5F100GFAFB,R5F101GJAFB,R5F10WMEAFB,R5F100PFAFB,R5F101MGAFB,R5F10BGELNA,R5F100PFAFA,R5F10266ASP,R5F10RLAANB,R5F110PEAFB,R5F1018AALA,R5F101MGAFA,R5F100AEASP,R5F10EGAANA,R5F101LGABG,R5F10E8EALA,R5F10FMDAFB,R5F10Y47ASP,R5F104BGAFP,R5F10279ANA,R5F10BAGLSP,R5F113MLLFB,R5F10PGDLNA,R5F100GCANA,R5F111PJAFB,R5F11FLKANA,R5F11BBEAFP,R5F101JCAFA,R5F1026AASP,R5F10RJAAFA,R5F104FAAFP,R5F10NMJDFB,R5F107DEMSP,R5F110NJALA,R5F100MFAFB,R5F100MFAFA,R5F1037AANA,R5F1007CANA,R5F111PGAFB,R5F10A6CLSP,R5F10PMJLFB,R5F100GHAFB,R5F10BBDLNA,R5F10BGCLFB,R5F104GFANA,R5F100LFABG,R5F104MGAFB,R5F104MGAFA,R5F101GHANA,R5F104ECANA,R5F104LEAFP,R5F101EEANA,R5F10RBCAFP,R5F104AFASP,R5F104PKAFB,R5F101BAANA,R5F100GEANA,R5F104LEAFA,RL78/G1,R5F104LEAFB,R5F104FGAFP,R5F101GKAFB,R5F101JEAFA,R5F11BBCAFP,R5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