Extensible Station Requirements for Cipher Key Types

When the miniport driver is operating in Extensible Station (ExtSTA) mode, the 802.11 station must support four or more default cipher keys. For more information about this type of cipher key, see Default Keys.

It is recommended that the 802.11 station support the following cipher key types:

  • 32 or more key-mapping keys. For more information about this type of cipher key, see Key-Mapping Keys.

  • 32 or more per-station (STA) default keys. For more information about this type of cipher key, see Per-Station Default Keys.

For the TKIP and AES-CCMP cipher algorithms, each cipher key must have a length of 128 bits.

For the WEP cipher suite, the 802.11 station can support one or more of the following WEP algorithms (as defined through the DOT11_CIPHER_ALGORITHM enumeration):

DOT11_CIPHER_ALGO_WEP40

The WEP algorithm that uses a 40-bit cipher key.

DOT11_CIPHER_ALGO_WEP104

The WEP algorithm that uses a 104-bit cipher key.

DOT11_CIPHER_ALGO_WEP

The WEP algorithm that uses a cipher key of any length.

When operating in ExtSTA mode, the miniport driver specifies the following when queried by OID_DOT11_EXTSTA_CAPABILITY:

  • The maximum number of entries within the default key, key-mapping key, and per-STA default key tables.

  • The maximum length of WEP keys supported by the 802.11 station.

 

 

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