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6.1.6.9.1.1 LSAPR_AUTH_INFORMATION

The format of the LSAPR_AUTH_INFORMATION structure is as follows.


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LastUpdateTime

...

AuthType

AuthInfoLength

AuthInfo (variable)

...

Padding (variable)

...

LastUpdateTime (8 bytes): This LARGE_INTEGER value represents the last time that the authentication information was set, in FILETIME format, as specified in [MS-DTYP] section 2.3.

AuthType (4 bytes): This ULONG value dictates the type of AuthInfo that is being stored. There are four values that are recognized by Windows.

Possible Values

Meaning

TRUST_AUTH_TYPE_NONE

0

AuthInfo byte field is invalid/not relevant.

TRUST_AUTH_TYPE_NT4OWF

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AuthInfo byte field contains an RC4 Key [RFC4757].

TRUST_AUTH_TYPE_CLEAR

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AuthInfo byte field contains a cleartext password, encoded as a Unicode string.

TRUST_AUTH_TYPE_VERSION

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AuthInfo byte field contains a version number, used by Netlogon for versioning interdomain trust secrets.

AuthInfoLength (4 bytes): A ULONG count of bytes in AuthInfo.

AuthInfo (variable): A BYTE field containing authentication data. Its size is [1...AuthInfoLength].

Padding (variable): Some number of bytes used to align the end of the LSAPR_AUTH_INFORMATION structure to a ULONG boundary. This padding is not included in the AuthInfoLength and consists of zeros.