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User Authentication Modules
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The 'uamg' Resource
All UAM files have a 'uamg' resource whose ID is 0. The 'uamg' resource is the UAM Info resource and it contains the following information:
type 'uamg'
{
integer VersionNumber;
integer UAMClass;
integer PasswordLength;
byte PassDlogFlag;
byte VolDlogFlag;
byte UAMType;
byte UReserved;
};
- VersionNumber
- Denotes the version of the UAM API that this UAM conforms to. For version 2.0 of the AFP client UAM interface, VersionNumber must be 2.
- UAMClass
- Denotes the class of the UAM. The value of UAMClass must be one of the following values:
- 0 indicates that this UAM uses Apple Computer's current UAM support, which consists of no user authentication, cleartext password, random number exchange, and two-way random number exchange. They cannot be replaced.
- 1 indicates that this class supports cleartext passwords longer than 8 characters. If you use this class, you don't need a 'uamc' resource because support for this class is built into the client--you only need to implement a server-side UAM. 2 indicates that this class supports encrypted passwords longer than 8 characters. If you use this class, you don't need a 'uamc' resource because support for this class is built into the client--you only need to implement a server-side UAM.
- 3 indicates that this UAM uses a UAM-defined authentication method. Use this class if you want to provide your own user interface and write code that handles the login sequence. Code that implements class 3 UAMs is stored as packed ' uamc ' ID 0 resource.
- PasswordLength
- Specifies the maximum password length that the UAM supports. The value of PasswordLength can be from 0 to 64.
- PassDlogFlag
- Obsolete. Replaced by the configInfo flags returned by UAMOpen Command.
- VolDlogFlag
- Obsolete. Replaced by the configInfo flags returned by UAMOpen Command.
- UAMType
- A user-defined ID in the range of 128 to 255. It is returned by the GetVolParams call as well as other calls. The AFP client does not depend on the value of UAMType to identify a particular UAM; instead, the AFP client uses a UAM's protocol name, as described in The 'uamn' Resource , to distinguish one UAM from another.
- UReserved
- Reserved. The value of UReserved is always zero.
© 1999 Apple Computer, Inc. – (Last Updated 07 May 99)