Abstract:
An application management agent running on a wireless communications device restricts access to device functionality (e.g., applications and device features) unless the application management agent has determined that a particular configuration profile has been installed on the device (after which the application management agent permits access to device functionality, and an operating system of the device enforces policy settings specified in the configuration profile). The application management agent confirms the presence of the configuration profile by initiating an SSL handshake with a client certificate request for a client SSL certificate embedded in the configuration profile. Validation against the embedded client SSL certificate implicitly confirms the presence of the configuration profile and validates the content of the configuration profile.
Abstract:
Examples provide for automatically provisioning hosts in a cloud environment. A cloud daemon generates a cloud host-state configuration, for a given cloud instance of a host, stored on a cloud metadata service prior to first boot of the given cloud instance of the host. A first boot of a plurality of cloud instances of hosts is performed using a stateless, master boot image lacking host-specific configuration data. On completion of the first boot of a given cloud instance of a host, the cloud host-state configuration is installed on the master boot image to generate a self-configured boot image including host-specific configuration data for the given cloud instance of the host. A second boot is performed on the given cloud instance of the host by executing the self-configured boot image to automatically provision the given cloud instance of the host in the cloud environment.
Abstract:
A computer system provides a mechanism for assuring a safe, non-preemptible access to a private data area (PRDA) belonging to a CPU. PRDA accesses generally include obtaining an address of a PRDA and performing operations on the PRDA using the obtained address. Safe, non-preemptible access to a PRDA generally ensures that a context accesses the PRDA of the CPU on which the context is executing, but not the PRDA of another CPU. While a context executes on a first CPU, the context obtains the address of the PRDA. After the context is migrated to a second CPU, the context performs one or more operations on the PRDA belonging to the second CPU using the address obtained while the context executed on the first CPU. In another embodiment, preemption and possible migration of a context from one CPU to another CPU is delayed while a context executes non-preemptible code.
Abstract:
A mapping table is passed to system software upon loading of the system software in a computer system. The mapping table is generated from a user-defined configuration file and maps device identifiers of various devices implemented in the computer system, as assigned by the device manufacturers, to device identifiers that are recognizable by the system software. The mapping is used by the system software when it performs binding of device drivers to devices so that devices that have been given generic and sometimes obscure names by the device manufacturers can still be associated with and bound to device drivers loaded by the system software.
Abstract:
A computer system that does not natively support non-maskable interrupts (NMIs) implements NMI-like functionality in a secure monitor. The computer system detects a high priority interrupt and determines whether or not interrupts are enabled or disabled. If interrupts are enabled, the computer system injects an exception into a currently executing thread of system software operating at the second privilege level, and an exception handler processes the exception like a standard exception. If interrupts are disabled, the computer system saves the current system state (e.g., the current program counter and CPU state) and values of one or more exception handling registers in temporary storage and injects an exception into the currently executing thread of the system software, and the exception handler processes the exception in a special manner.
Abstract:
Particular embodiments provide a method to authenticate a user of an application running on a mobile operating system (OS) installed on a mobile device, wherein the mobile OS invokes callback methods of the application upon making changes to an execution state of the application. Code embedded into the application causes the application to communicate with a management agent installed in the mobile OS upon invocation of a hooked callback method. Upon invocation of the hooked callback method, the embedded code assesses whether the user should be provided an authentication challenge prior to enabling the application to run in the foreground, and presents the authentication challenge if necessary. Finally, the embedded code returns execution control from the management agent back to the application wherein the application executes the at least one callback method prior to running in the foreground.
Abstract:
In an example, a computer system includes a hardware platform and a hypervisor executing on the hardware platform. The hypervisor includes a kernel and a plurality of user-space instances within a user-space above the kernel. Each user-space instance is isolated from each other user-space instance through namespaces. Each user-space instance includes resources confined by hierarchical resource groups. The computer system includes a plurality of virtual hypervisors, where each virtual hypervisor executes in a respective user-space instance of the plurality of user-space instances.
Abstract:
In a virtualized computer system operable in more than two hierarchical privilege levels, components of a hypervisor, which include a virtual machine kernel and virtual machine monitors (VMMs), are assigned to different privilege levels. The virtual machine kernel operates at a low privilege level to be able to exploit certain features provided by the low privilege level, and the VMMs operate at a high privilege level to support execution of virtual machines. Upon determining that a context switch from the virtual machine kernel to a VMM is to be performed, the computer system exits the low privilege level, and enters the high privilege level to execute a trampoline that supports context switches to VMMs, such as state changes, and then the VMM. The trampoline is deactivated after execution control is switched to the VMM.
Abstract:
In an example, a method of creating a secured workspace in a mobile device includes installing an application management agent on the mobile device, wherein the application management agent is configured to communicate with a remote server to obtain a security policy. The method further includes installing a wrapped enterprise application to the mobile device. The wrapped enterprise application includes code injected therein that, when executed by the mobile device, causes the mobile device to intercept at least a portion of instructions being executed by the wrapped enterprise application and to interpose alternative instructions that comply with the security policy. The method further includes communicating among the wrapped enterprise application, the application management agent, and other wrapped enterprise applications through pasteboard and uniform resource locator (URL) handlers provided by an operating system of the mobile device.
Abstract:
An application management agent running on a wireless communications device restricts access to device functionality (e.g., applications and device features) unless the application management agent has determined that a particular configuration profile has been installed on the device (after which the application management agent permits access to device functionality, and an operating system of the device enforces policy settings specified in the configuration profile). The application management agent confirms the presence of the configuration profile by initiating an SSL handshake with a client certificate request for a client SSL certificate embedded in the configuration profile. Validation against the embedded client SSL certificate implicitly confirms the presence of the configuration profile and validates the content of the configuration profile.