SAM_ChangeKeyEntry error switching a virgin MIFARE SAM AV2 from AV1 to AV2 Mode

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  • 5. July 2017 at 14:57
    Hi,

    I'm trying to execute the SAM_ChangeKeyEntry command in MIFARE SAM AV2 to change the type of MIFARE SAM AV2 master key to AES-128. I'm following the sequence indicate in AN18211, but the response for the ChangeKeyEntry command is always 6982.
    I know that the error indicates 'cryptogram incorrect', but I've the doubt on which data have to be used to calculate the CRC. Only command data before encryption?

    Thanks in advanced

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    Re: SAM_ChangeKeyEntry error switching a virgin MIFARE SAM AV2 from AV1 to AV2 Mode

    10. July 2017 at 10:41
    Hi Jesús Manuel,

    Application note “AN10980 – MIFARE SAM AV2 – Host Communication” contains a calculated example of SAM_ChangeKeyEntry().

    “Security status not satisfied” could also mean that you not authenticated before you try to change a key. Do you authenticated successfully in host mode?

    Regards,
    The TapLinx team
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    Re: SAM_ChangeKeyEntry error switching a virgin MIFARE SAM AV2 from AV1 to AV2 Mode

    16. May 2018 at 10:42
    Hi,

    I have similar Problem with virgin SAM AV2

    i want to make the Change key entries to Transport values in AV1 mode (AN1823)
    and the result of ChangeKeyEntry is 67 00


    SAM_GetVersion
    TX: 80 60 00 00 00 00
    RX: 04 01 01 03 02 28 01 04 01 01 03 02 28 01 04 31 27 8A 5F 4F 80 98 46 69 00 00 05 09 10 00 A1 - 90 00

    SAM_GetKeyEntry
    TX: 80 64 00 00 00 00
    RX: 00 00 00 00 00 00 00 00 00 FF 00 00 - 90 00

    SAM_AuthenticateHost (TDEA)
    TX: 80 A4 00 00 02 00 00 00
    RX: 80 31 90 40 41 9E 15 4D - 90 AF

    SAM_AuthenticateHost (TDEA)
    TX: 80 A4 00 00 10 A3 F5 91 F7 AB 88 24 43 D7 49 A1 3F 36 0F B1 17 00
    RX: BF DA 8B BE 9C 4F 0A 0F - 90 00

    SAM_ChangeKeyEntry (TDEA)
    TX: 80 C1 00 FF 40 xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx 00
    RX: 67 00

    some idea?

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    Re: SAM_ChangeKeyEntry error switching a virgin MIFARE SAM AV2 from AV1 to AV2 Mode

    16. May 2018 at 14:06
    solved!
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