Network Working Group T. Freeman
Request for Comments: 5055 Microsoft Corp
Category: Standards Track R. Housley
Vigil Security
A. Malpani
Malpani Consulting Services
D. Cooper
W. Polk
NIST
December 2007
Server-Based Certificate Validation Protocol (SCVP)
Status of This Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Abstract
The Server-Based Certificate Validation Protocol (SCVP) allows a
client to delegate certification path construction and certification
path validation to a server. The path construction or validation
(e.g., making sure that none of the certificates in the path are
revoked) is performed according to a validation policy, which
contains one or more trust anchors. It allows simplification of
client implementations and use of a set of predefined validation
policies.
Table of Contents
1. Introduction ....................................................4
1.1. Terminology ................................................4
1.2. SCVP Overview ..............................................5
1.3. SCVP Requirements ..........................................5
1.4. Validation Policies ........................................6
1.5. Validation Algorithm .......................................7
1.6. Validation Requirements ....................................8
2. Protocol Overview ...............................................9
3. Validation Request ..............................................9
3.1. cvRequestVersion ..........................................12
3.2. query .....................................................12
3.2.1. queriedCerts .......................................13
3.2.2. checks .............................................15
Freeman, et al. Standards Track [Page 1]RFC 5055 SCVP December 2007
3.2.3. wantBack ...........................................16
3.2.4. validationPolicy ...................................19
3.2.4.1. validationPolRef ..........................20
3.2.4.1.1. Default Validation Policy ......21
3.2.4.2. validationAlg .............................22
3.2.4.2.1. Basic Validation Algorithm .....22
3.2.4.2.2. Basic Validation
Algorithm Errors ...............23
3.2.4.2.3. Name Validation Algorithm ......24
3.2.4.2.4. Name Validation
Algorithm Errors ...............25
3.2.4.3. userPolicySet .............................26
3.2.4.4. inhibitPolicyMapping ......................26
3.2.4.5. requireExplicitPolicy .....................27
3.2.4.6. inhibitAnyPolicy ..........................27
3.2.4.7. trustAnchors ..............................27
3.2.4.8. keyUsages .................................28
3.2.4.9. extendedKeyUsages .........................28
3.2.4.10. specifiedKeyUsages .......................29
3.2.5. responseFlags ......................................30
3.2.5.1. fullRequestInResponse .....................30
3.2.5.2. responseValidationPolByRef ................30
3.2.5.3. protectResponse ...........................31
3.2.5.4. cachedResponse ............................31
3.2.6. serverContextInfo ..................................32
3.2.7. validationTime .....................................32
3.2.8. intermediateCerts ..................................33
3.2.9. revInfos ...........................................34
3.2.10. producedAt ........................................35
3.2.11. queryExtensions ...................................35
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