首先,我知道这看起来像是复制品:ePassport reading with PN532, Keep Getting SW1 SW2 = 0x69 0x88 (Incorrect Secure Messaging Data Objects)
…但我在这一过程中又前进了一步。在
我正在尝试使用python和PN7120 nfc阅读器读取MRTD(ePassport)。我用pyPassport 2.0作为基础。在
我知道读卡器没问题,因为我可以用同样的设备用安卓系统来读护照。在
我遵循the ICAO 9303 Part 11 documentation,并模拟了“工作示例”(附录D,相同的文件)。在
问题
使用真实的passport时,步骤“select applet”、“get challenge”、“do bac”和“select file”步骤运行正常,但读取二进制文件会导致6988(不正确的安全消息传递数据对象)。在
当我通过注入ksmac/ssc来模拟“工作示例”时,我得到了与第75页(AppD-7)第g点所述完全相同的protectedadu结果
同样,步骤“select file”几乎使用了完全相同的过程(参见def protect),并获得成功(rapd u 90 00)。在
我把每件事都和极端细节做了至少两次比较,真的不知道下一步该怎么看。我希望有人能给一些建议或见解。在
相关日志(最后出错)
Calculate Session Keys (KSenc and KSmac) using appendix 5.1
KSenc: 3DE649F8AEA41C04FB6D4CD9043757AD
KSmac: 8C34AD61974F68CEBA3E0EAEA1456476
Calculate Send Sequence Counter
SSC: AB1D2F337FD997D6
Reading Common
Select File
APDU 00 A4 02 0C 02 [011E]
Mask class byte and pad command header
CmdHeader: 0CA4020C80000000
Pad data
Data: 011E800000000000
Encrypt data with KSenc 3DE649F8AEA41C04FB6D4CD9043757AD
EncryptedData: FF0E241E2F94B508
Build DO'87
DO87: 870901FF0E241E2F94B508
Concatenate CmdHeader and DO87
M: 0CA4020C80000000870901FF0E241E2F94B508
Compute MAC of M
Increment SSC with 1
SSC: AB1D2F337FD997D7
Concatenate SSC and M and add padding
N: AB1D2F337FD997D70CA4020C80000000870901FF0E241E2F94B5088000000000
Compute MAC over N with KSmac 8C34AD61974F68CEBA3E0EAEA1456476
CC: 22FF803EC3104336
Build DO'8E
DO8E: 8E0822FF803EC3104336
Construct and send protected APDU
ProtectedAPDU: 0CA4020C15870901FF0E241E2F94B5088E0822FF803EC310433600
[SM] - 0C A4 02 0C 15 [870901FF0E241E2F94B5088E0822FF803EC3104336] 00
[SM] - [990290008E08AAEA3B783FD6CA9D] 90 00
Receive response APDU of MRTD's chip
RAPDU: 990290008E08AAEA3B783FD6CA9DC29000
Read Binary
APDU 00 B0 00 00 [] 04
Mask class byte and pad command header
CmdHeader: 0CB0000080000000
Build DO'97
DO97: 970104
Concatenate CmdHeader and DO97
M: 0CB0000080000000970104
Compute MAC of M
Increment SSC with 1
SSC: AB1D2F337FD997D8
Concatenate SSC and M and add padding
N: AB1D2F337FD997D80CB00000800000009701048000000000
Compute MAC over N with KSmac 8C34AD61974F68CEBA3E0EAEA1456476
CC: 68DD9FD88472834A
Build DO'8E
DO8E: 8E0868DD9FD88472834A
Construct and send protected APDU
ProtectedAPDU: 0CB000000D9701048E0868DD9FD88472834A00
[SM] - 0C B0 00 00 0D [9701048E0868DD9FD88472834A] 00
[SM] - [] 69 88 //SM data objects incorrect
谢谢!!在
弄明白了:
由于二进制/十六进制/字符串转换错误(here),选择文件响应的SM验证步骤被跳过,因此SSC没有正确递增。在
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