Technical Manual

East Wind Technologies, Inc.
Copyright © 2022 East Wind Technologies, Inc. All rights reserved. 40/59
3.7.2.3 DESFire Change Key Settings
Function: Modify the master key/application master key configuration setting. DES/3DES
encryption and CRC checksum will be used in the process of instruction execution.
Host sends:
Frame
0x91
KeySettings
Checksum
KeySettings: 8 bytes encrypted key settings.
Success:
Frame
0x91
Status
Checksum
Status: status code returned from the card.
Please reference: DESFire Returned State Code.
Failure:
Frame
0x6E
Checksum
3.7.2.4 DESFire Get Key Settings
Function: Get the master key/appalication master key configureation settings.
Host sends:
Frame
0x92
Checksum
Success:
Frame
0x92
Status
KeySetting
Max.KeyNo
Checksum
Status: status code returned from the card.
Please reference: DESFire Returned State Code.
KeySetting: 1 byte
Max.KeyNo: 1byte, Max. Key numbers of current application
Failure:
Frame
0x6D
Checksum
3.7.2.5 DESFire Change Key
Function: Modify the key stored in the card. DES/3DES encryption and CRC checksum will
be use in the process of instruction execution.
Host sends:
Frame
0x93
KeyID
ekKey
Checksum
KeyID: 1 byte.
ekKey: 24bytes (Refer to the datasheet for encryption calculations, or use the tools we
provide and references to source code).
Success:
Frame
0x93
Status
Checksum
Status: status code returned from the card.
Please reference: DESFire Returned State Code.
Failure:
Frame
0x6C
Checksum