Amazon Technologies, Inc.

Correct Computation, Inc.

Michael W Hicks

Neha Rungta

Emina Torlak

Kyle Headley

Andrew Marshall Wells

Richard Matthew Mccutchen

John Holman Kastner

Anwar Mamat

Aaron Joseph Eline

Mark Edward Stalzer

Darin Keith McAdams

Ian Nicholas Sweet

Eleftherios Ioannidis

Joseph Wallace Cutler

B S Lavender

Darin Mcadams

Julian Lovelock

Shaobo He

Kesha Hanne Hietala

Craig Ryan Disselkoen

A system and method for authorization policy evaluation. Authorization policies are authored in a general-purpose authorization language. An evaluation engine is used in a provider network by application developers to manage access within their applications based on fine-grained permissions. The policy language combines elements of role-based and attributed-based access control within an intuitive syntax and efficient evaluation strategy. The policy syntax separates role-based expressions of a policy from attribute-based expressions of the policy.

Authorization policy evaluation

A system and method for authorization policy analysis. A policy analyzer answers first-order questions about authorization policies by reducing the policies to Satisfiability modulo theories (SMT). Input to the analyzer includes a policy to be analyzed and a schema for that policy. If the policy passes strict validation against the schema, then the analyzer symbolically evaluates the policy to encode its semantics as an SMT expression. The SMT expression is used for formulate a desired query about policy behavior such as, for example, if there is any input on which two policies both evaluate to true. The reduction to SMT produces a quantifier-free formula in a combination of decidable theories to support large scale deployments. This reduction is achieved by focusing the analysis on policies that pass strict validation, rather than attempting to analyze arbitrary policies.

Authorization policy analysis

A system and method for authorization policy validation. A validator takes as input an authorization policy to be analyzed and a schema that specifies entity types and their attributes, types of entity parents in an entity hierarchy, and which entity types can be used with which actions. The validator checks that the policy conforms to the schema. If the check passes, then the policy is guaranteed to be free of both type errors and attribute access errors for any input that conforms to the schema.

Authorization policy validation

In one embodiment, an application programming interface (API) and machine code associated with a software library are accessed. Data sources and data sinks in the software library are identified based on the API, and a data flow among the data sources and data sinks is determined based on a dynamic analysis of the machine code associated with the software library. A flow graph associated with the software library is then generated to represent the data flow among the data sources and data sinks, and a source code model associated with the software library is generated based on the flow graph.

Automated generation of source code models from machine code for code analysis

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Silver Spring, MD, United States of America

Michael W Hicks