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Verifying an HTTP Key-Value Server with Interaction Trees and VST

Authors: Hengchu Zhang, Wolf Honoré, Nicolas Koh, Yao Li, Yishuai Li, Li-Yao Xia, Lennart Beringer, William Mansky, Benjamin Pierce, and Steve Zdancewic

Published in: LIPIcs, Volume 193, 12th International Conference on Interactive Theorem Proving (ITP 2021)


Abstract
We present a networked key-value server, implemented in C and formally verified in Coq. The server interacts with clients using a subset of the HTTP/1.1 protocol and is specified and verified using interaction trees and the Verified Software Toolchain. The codebase includes a reusable and fully verified C string library that provides 17 standard POSIX string functions and 17 general purpose non-POSIX string functions. For the KVServer socket system calls, we establish a refinement relation between specifications at user-space level and at CertiKOS kernel-space level.

Cite as

Hengchu Zhang, Wolf Honoré, Nicolas Koh, Yao Li, Yishuai Li, Li-Yao Xia, Lennart Beringer, William Mansky, Benjamin Pierce, and Steve Zdancewic. Verifying an HTTP Key-Value Server with Interaction Trees and VST. In 12th International Conference on Interactive Theorem Proving (ITP 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 193, pp. 32:1-32:19, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)


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@InProceedings{zhang_et_al:LIPIcs.ITP.2021.32,
  author =	{Zhang, Hengchu and Honor\'{e}, Wolf and Koh, Nicolas and Li, Yao and Li, Yishuai and Xia, Li-Yao and Beringer, Lennart and Mansky, William and Pierce, Benjamin and Zdancewic, Steve},
  title =	{{Verifying an HTTP Key-Value Server with Interaction Trees and VST}},
  booktitle =	{12th International Conference on Interactive Theorem Proving (ITP 2021)},
  pages =	{32:1--32:19},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-188-7},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{193},
  editor =	{Cohen, Liron and Kaliszyk, Cezary},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ITP.2021.32},
  URN =		{urn:nbn:de:0030-drops-139273},
  doi =		{10.4230/LIPIcs.ITP.2021.32},
  annote =	{Keywords: formal verification, Coq, HTTP, deep specification}
}
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