LSA_AP_LOGON_USER_EX callback function (ntsecpkg.h)

Authenticates a user's logon credentials.

This function is called by the Local Security Authority (LSA) only for a user's initial logon. Subsequent authentication requests must use LsaCallAuthenticationPackage. If LsaApLogonUserEx succeeds, it creates a logon session and returns information used to build the token representing the newly logged on user.

This function differs from LsaApLogonUser in that the machine name is added to the audit record for the logon attempt.

Syntax

LSA_AP_LOGON_USER_EX LsaApLogonUserEx;

NTSTATUS LsaApLogonUserEx(
  [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] PUNICODE_STRING *AccountName,
  [out] PUNICODE_STRING *AuthenticatingAuthority,
  [out] PUNICODE_STRING *MachineName
)
{...}

Parameters

[in] ClientRequest

Pointer to an opaque LSA_CLIENT_REQUEST data type representing the LSA client's request.

[in] LogonType

A SECURITY_LOGON_TYPE structure which identifies the type of logon being attempted.

[in] AuthenticationInformation

Supplies the authentication information specific to the authentication package. The LSA will free this buffer.

[in] ClientAuthenticationBase

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

[in] AuthenticationInformationLength

Indicates the length of the AuthenticationInformation buffer.

[out] ProfileBuffer

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 which prevents a successful logon, then the LSA will take care of freeing 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.

[out] ProfileBufferLength

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

[out] LogonId

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

[out] SubStatus

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 are SubStatus values for the MSV1_0 and Kerberos authentication packages.

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

[out] TokenInformationType

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 by means of the TokenInformation parameter.

[out] TokenInformation

Pointer that receives the address of information to be included in the token. The format and content of TokenInformation 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.

[out] AccountName

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 It will be freed by the LSA.

[out] AuthenticatingAuthority

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.

[out] MachineName

Optional. Pointer that receives the address of an LSA_UNICODE_STRING structure containing the name of the client's workstation. This information is included in the audit record for an authentication attempt. Your authentication package is responsible for allocating the memory used by MachineName; however, this memory will be freed by the LSA.

The MSV1_0 authentication package returns the NetBIOS name of the client's workstation.

Return value

If the function succeeds, it should return STATUS_SUCCESS.

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

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.

LsaApLogonUserEx was added for C2 certification. C2 is a security classification defined by the United States government.

Requirements

See also

LSA_CLIENT_REQUEST

LSA_TOKEN_INFORMATION_TYPE

LSA_UNICODE_STRING

LsaApLogonUser

LsaApLogonUserEx2

LsaCallAuthenticationPackage