请教一下华为光猫固件里的signature签名是如何封装的或者升级版本时绕过signature签名

hudengke718

我的软件版本是V300R017C10SPC125修改了升级包，对所有校验的地方重新计算。但是在升级时这个signature签名通不过，有256个字节的校验信息不知道如何计算的。



<SWM>[hw_swm_signature.c_2959]Verify Signature hash ERROR!Real=[0d5948d9978d99f09681e9c902b87bff7401acd6a895ae96184174980477d3ab],Verify=[1a34143483c9138f359c87fed811d733daac4974da4d02e6c24c1249cb92db51]
<SWM>[hw_swm_pdt_init.c_3871]HW_SWM_PacketErrorParse ERROR!uiReturn = 0xf720404e
<SWM>[hw_swm_load.c_1813]HW_SWM_LoadThread End While!uiState=1,process=0%
<SWM>[hw_swm_receive.c_275]HW_SWM_StopRcv!uiPara=0xf720404e
<SWM>[hw_swm_load.c_1481]Start join recv thread!
<SWM>[hw_swm_receive.c_275]HW_SWM_StopRcv!uiPara=0xf7204028
<SWM>[hw_swm_receive.c_275]HW_SWM_StopRcv!uiPara=0xf7204028
<SWM>[hw_swm_load.c_850]Set Load Failed!
<SWM>[hw_swm_receive.c_881]receive thread. olt crc:[0xd1c1f5a4]
<SWM>[hw_swm_receive.c_894]HW_SWM_ReceiveThread Exit!uiRet=0xf7204028
<SWM>[hw_swm_load.c_850]Set Load Failed!
Killed
<SWM>[hw_swm_load.c_1487]End join recv thread!
<SWM>[hw_swm_load.c_1490]uiResult=[0xf720404e]
<SWM>[hw_swm_load.c_1492]uiResult=[0xf720404e]
<SWM>[hw_swm_segment.c_2901]Before:ProcLen=[0],RecvLen=[23163]
<SWM>[hw_swm_segment.c_2909]After:ProcLen=[0],RecvLen=[23163]
Load TimeOut AlarmID: 104058
<SWM>[hw_swm_load.c_1842]Exit Load Ctrl!!!!
<SWM>[hw_swm_packet.c_6559]Set uiFsmState to 0!
SWM UPGRATED:[1|3|0xf720404e|HS8145C]
HW_SWM_PDT_IsLoadRoofs Called
<SWM>[hw_swm_load.c_1888]HW_SWM_LoadThread End While!uiRet=0xf720404e
<SWM>[hw_swm_externproc.c_1583]HW_SWM_Notify Notify by Mid_19 Err_0xf720404e
<SWM>[hw_swm_core.c_420]
<SWM>[hw_swm_externproc.c_1164]receive olt crc:[0xd1c1f5a4]
<SWM>[hw_swm_load.c_850]Set Load Failed!
<SWM>[hw_swm_receive.c_275]HW_SWM_StopRcv!uiPara=0xf720404e