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3.1.4.4.1 AES Credential

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If AES support is negotiated between the client and the server, the Netlogon credentials are computed using the AES-128 encryption algorithm in 8-bit CFB mode with a zero initialization vector.

 ComputeNetlogonCredential(Input, Sk, 
              Output)
  
       SET IV = 0
       CALL AesEncrypt(Input, Sk, IV, Output)

AesEncrypt is the AES-128 encryption algorithm in 8-bit CFB mode with a zero initialization vector [FIPS197].