User Objects

Home >	ProtectToolkit-C Programming Guide > Object Classes > User Objects

User Objects

User objects provide a means to obtain Authentication values (these objects can be used when logging into a Token). The User object is supported only on soft (non-smart card based) tokens. It is automatically created whenever a Token is initialized.

The attributes of the User Object may be read to obtain an Authentication Challenge or to get a Temporary PIN.

For more details on the use of the User Object, refer to the description of C_Login.

Table 1: User Attributes
Attribute	Data Type	Meaning
`CKA_AUTH_CHALLENGE`	`CK_CHAR[16]`	The current challenge value. Each time this attribute is read a new challenge value will be returned.
`CKA_TEMP_PIN`	`CK_CHAR[32]`	The current Temporary PIN value. Each time this attribute is read a new PIN value will be returned. A `CKU_USER` or `CKU_SO` must be logged in or else a read of this attribute will return `CKR_USER_NOT_LOGGED_IN` error. The PIN returned can only be used to authenticate the same user that is currently logged in.