Abstract: For a flexible error trace mechanism, embodiments may be implemented for C/C++ interface libraries, or in programs written in C/C++ or other programming languages. In one embodiment, when an error occurs in a function call, a trace element may be recorded that may include the source file name, function name, line number and other information that may be used to identify the error. In one embodiment, the library function may call a plurality of library functions in a function call stack. For each of the plurality of library functions, if the library function generates an error, an error trace element may be added to the error trace. After completion of the library function, the program may obtain the error trace for the library function. The error(s), if any, may be debugged using the information in the obtained error trace.

Abstract: A system and method for providing pluggable authentication and access control in computer systems and services are described. The authentication and access control process may be categorized into three components: an authentication protocol, a user repository and an access control model. In one embodiment, the authentication and access control mechanism may be implemented as three pluggable modules: an authentication protocol handler module for the authenticator side, an authentication protocol handler for the side to be authenticated, and an access control context module on the authenticator side. The pluggable modules may be exchangeable to support a variety of authentication types, user repositories, and access control models. The authentication protocol handlers provide symmetrical methods to handle requests and responses in the authentication process that reflect the symmetrical nature of the authentication process.

Abstract: A system and method for providing pluggable authentication and access control in computer systems and services are described. The authentication and access control process may be categorized into three components: an authentication protocol, a user repository and an access control model. In one embodiment, the authentication and access control mechanism may be implemented as three pluggable modules: an authentication protocol handler module for the authenticator side, an authentication protocol handler for the side to be authenticated, and an access control context module on the authenticator side. The pluggable modules may be exchangeable to support a variety of authentication types, user repositories, and access control models. The authentication protocol handlers provide symmetrical methods to handle requests and responses in the authentication process that reflect the symmetrical nature of the authentication process.