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LsaApLogonUser function

Authenticates a user's logon credentials.

This function is called only for a user's initial logon. Subsequent authentication requests must use LsaCallAuthenticationPackage.

If LsaApLogonUser succeeds, it creates a logon session. It also returns information used to build the token representing the newly logged-on user.

Syntax


NTSTATUS LsaApLogonUser(
  _In_   PLSA_CLIENT_REQUEST ClientRequest,
  _In_   SECURITY_LOGON_TYPE LogonType,
  _In_   PVOID AuthenticationInformation,
  _In_   PVOID ClientAuthenticationBase,
  _In_   ULONG AuthenticationInformationLength,
  _Out_  PVOID *ProfileBuffer,
  _Out_  PULONG ProfileBufferLength,
  _Out_  PLUID LogonId,
  _Out_  PNTSTATUS SubStatus,
  _Out_  PLSA_TOKEN_INFORMATION_TYPE TokenInformationType,
  _Out_  PVOID *TokenInformation,
  _Out_  PLSA_UNICODE_STRING *AccountName,
  _Out_  PLSA_UNICODE_STRING *AuthenticatingAuthority
);

Parameters

ClientRequest [in]

Pointer to an opaque LSA_CLIENT_REQUEST buffer that represents the LSA client's request. Your authentication package can pass this value into AllocateClientBuffer and FreeClientBuffer in order to identify the client process in which memory should be allocated or freed.

LogonType [in]

A SECURITY_LOGON_TYPE value identifying the type of logon requested.

AuthenticationInformation [in]

Supplies the authentication information specific to the authentication package. The LSA will free this buffer. This is the same input buffer passed into LsaLogonUser.

ClientAuthenticationBase [in]

Provides the address of the authentication information within the client process. This may be necessary to remap any pointers within the AuthenticationInformation buffer.

AuthenticationInformationLength [in]

Indicates the length, in bytes, of the AuthenticationInformation buffer.

ProfileBuffer [out]

Pointer that receives the address of the profile buffer in the client process. The authentication package is responsible for allocating the ProfileBuffer buffer within the client process by calling the AllocateClientBuffer function. However, if the LSA subsequently encounters an error that prevents a successful logon, the LSA will free this buffer.

The contents of this buffer are determined by the authentication package. The LSA does not alter this buffer; it simply returns the value to the LsaLogonUser function.

ProfileBufferLength [out]

Pointer to a ULONG that receives the length of the ProfileBuffer buffer, in bytes.

LogonId [out]

Pointer to an LUID that receives the new logon ID that uniquely identifies this logon session. The authentication package is responsible for allocating this LUID, and creating the logon session for this logon.

SubStatus [out]

Pointer to an NTSTATUS that receives the reason for failures due to account restrictions. The values returned in SubStatus are determined by the authentication package.

The following table lists the SubStatus values for the MSV1_0 and Kerberos authentication packages.

ValueMeaning
STATUS_INVALID_LOGON_HOURS

The user account has time restrictions; it cannot be used to log on at this time.

STATUS_INVALID_WORKSTATION

The user account has workstation restrictions; it cannot be used to log on to the current workstation.

STATUS_PASSWORD_EXPIRED

The user account password has expired.

STATUS_ACCOUNT_DISABLED

The user account is currently disabled and cannot be used to log on.

 

More information about NTSTATUS codes can be found in the Subauth.h header file shipped with the Platform SDK.

The LsaNtStatusToWinError function converts an NTSTATUS code to a Windows error code.

TokenInformationType [out]

Pointer that receives the address of an LSA_TOKEN_INFORMATION_TYPE value that indicates the type of information returned for inclusion in the token to be created. The information is returned in the TokenInformation buffer.

TokenInformation [out]

Pointer that receives information to be included in the token. The format and content of the TokenInformation buffer are indicated by the TokenInformationType parameter. Your authentication package is responsible for allocating the memory used by TokenInformation; however, this memory will be freed by the LSA.

AccountName [out]

Pointer to an LSA_UNICODE_STRING structure that receives the name of the user account. AccountName must always be returned regardless of the success or failure of the call; its string is included in the audit record for an authentication attempt. Your authentication package is responsible for allocating the memory used by AccountName; however, this memory will be freed by the LSA.

AuthenticatingAuthority [out]

Optional. Pointer to an LSA_UNICODE_STRING structure that receives the description of the authenticating authority for the logon. This parameter may be NULL. This string is included in the audit record for an authentication attempt. Your authentication package is responsible for allocating the memory used by AuthenticatingAuthority; however, this memory will be freed by the LSA.

The MSV1_0 authentication package returns the domain name of the domain validating the account. The Kerberos authentication package returns the NetBIOS domain name.

Return value

If the function succeeds, it should return STATUS_SUCCESS.

If the function fails, it should return an NTSTATUS error code, which can be one of the following values or one of the LSA Policy Function Return Values.

Return codeDescription
STATUS_NO_MEMORY

The logon could not be completed because the client's memory quota is insufficient to allocate the return buffer.

STATUS_NO_LOGON_SERVERS

No domain controllers are available to service the authentication request.

STATUS_LOGON_FAILURE

The logon attempt failed. The reason for failure is not specified; typical reasons include misspelled user names and passwords.

STATUS_ACCOUNT_RESTRICTION

The user account and password were legitimate, but user account restrictions prevent logon at this time. For additional information, see the SubStatus parameter.

STATUS_BAD_VALIDATION_CLASS

The authentication information provided is not recognized by the specified authentication package.

 

Calling applications can use the LsaNtStatusToWinError function to convert the NTSTATUS code to a Windows error code.

Remarks

Authentication packages must implement one of the following functions: LsaApLogonUser, LsaApLogonUserEx, or LsaApLogonUserEx2.

Requirements

Minimum supported client

Windows XP [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Ntsecpkg.h

See also

LSA_CLIENT_REQUEST
LSA_TOKEN_INFORMATION_TYPE
LSA_UNICODE_STRING
LsaApLogonUserEx
LsaApLogonUserEx2
LsaCallAuthenticationPackage

 

 

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