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Internet Engineering Task Force (IETF) J. Schaad Request for Comments: 6268 Soaring Hawk Consulting Updates: 5911 S. Turner Category: Informational IECA, Inc. ISSN: 2070-1721 July 2011 Additional New ASN.1 Modules for the Cryptographic Message Syntax (CMS) and the Public Key Infrastructure Using X.509 (PKIX) Abstract The Cryptographic Message Syntax (CMS) format, and many associated formats, are expressed using ASN.1. The current ASN.1 modules conform to the 1988 version of ASN.1. This document updates some auxiliary ASN.1 modules to conform to the 2008 version of ASN.1; the 1988 ASN.1 modules remain the normative version. There are no bits- on-the-wire changes to any of the formats; this is simply a change to the syntax. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6268. Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must Schaad & Turner Informational [Page 1]
RFC 6268 Additional New ASN.1 Modules July 2011 include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. ASN.1 Updates (2002 to 2008) . . . . . . . . . . . . . . . 4 1.2. Requirements Terminology . . . . . . . . . . . . . . . . . 4 2. ASN.1 Module RFC 3274 . . . . . . . . . . . . . . . . . . . . 5 3. ASN.1 Module RFC 3779 . . . . . . . . . . . . . . . . . . . . 7 4. ASN.1 Module RFC 6019 . . . . . . . . . . . . . . . . . . . . 10 5. ASN.1 Module RFC 4073 . . . . . . . . . . . . . . . . . . . . 11 6. ASN.1 Module RFC 4231 . . . . . . . . . . . . . . . . . . . . 12 7. ASN.1 Module RFC 4334 . . . . . . . . . . . . . . . . . . . . 15 8. ASN.1 Module RFC 5083 . . . . . . . . . . . . . . . . . . . . 16 9. ASN.1 Module RFC 5652 . . . . . . . . . . . . . . . . . . . . 18 10. ASN.1 Module RFC 5752 . . . . . . . . . . . . . . . . . . . . 29 11. Module Identifiers in ASN.1 . . . . . . . . . . . . . . . . . 30 12. Security Considerations . . . . . . . . . . . . . . . . . . . 32 13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 32 13.1. Normative References . . . . . . . . . . . . . . . . . . . 32 13.2. Informative References . . . . . . . . . . . . . . . . . . 33 Schaad & Turner Informational [Page 2]
RFC 6268 Additional New ASN.1 Modules July 2011 1. Introduction Some developers would like the IETF to use the latest version of ASN.1 in its standards. Most of the RFCs that relate to security protocols still use ASN.1 from the 1988 standard, which has been deprecated. This is particularly true for the standards that relate to PKIX, CMS, and Secure/Multipurpose Internet Mail Extensions (S/MIME). In this document we have either changed the syntax to use the 2008 ASN.1 standard, or done some updates from previous conversions. The ASN.1 modules updated came from the following RFCs: o RFC 3274, Compressed Data Content Type for Cryptographic Message Syntax (CMS) [RFC3274]. o RFC 3779, X.509 Extensions for IP Addresses and AS Identifiers [RFC3779]. o RFC 6019, BinaryTime: An Alternate Format for Representing Date and Time in ASN.1 [RFC6019]. o RFC 4073, Protecting Multiple Contents with the Cryptographic Message Syntax (CMS) [RFC4073]. o RFC 4231, Identifiers and Test Vectors for HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 [RFC4231]. o RFC 4334, Certificate Extensions and Attributes Supporting Authentication in Point-to-Point Protocol (PPP) and Wireless Local Area Networks (WLAN) [RFC4334]. o RFC 5083, Cryptographic Message Syntax (CMS) Authenticated- Enveloped-Data Content Type [RFC5083]. o RFC 5652, Cryptographic Message Syntax (CMS) [RFC5652]. o RFC 5752, Multiple Signatures in Cryptographic Message Syntax (CMS) [RFC5752]. Note that some of the modules in this document get some of their definitions from places different than the modules in the original RFCs. The idea is that these modules, when combined with the modules in [RFC5911] and [RFC5912], can stand on their own and do not need to import definitions from anywhere else. Schaad & Turner Informational [Page 3]
RFC 6268 Additional New ASN.1 Modules July 2011 This document does not explicitly update the RFCs from which the ASN.1 modules have been extracted. This is because the original 1988 ASN.1 syntax remains the normative version and the modules in this document as well as in [RFC5911] and [RFC5912] are informative (but hopefully useful) annexes. 1.1. ASN.1 Updates (2002 to 2008) The modules defined in this document are compatible with the most current ASN.1 specification published in 2008 (see [ASN1-2008]). The changes between the 2002 specification and the 2008 specification include the creation of additional pre-defined types (DATE, DATE- TIME, DURATION, NOT-A-NUMBER, OID-IRI, RELATIVE-OID-IRI, TIME, TIME- OF-DAY) and the ability to define different encoding rules (ENCODING- CONTROL, INSTRUCTIONS). None of the newly defined tokens are currently used in any of the ASN.1 specifications published here. Information on the changes to ASN.1 between the 1988 and 2002 versions can be found in [RFC6025]. 1.2. Requirements Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Schaad & Turner Informational [Page 4]
RFC 6268 Additional New ASN.1 Modules July 2011 2. ASN.1 Module RFC 3274 We have updated the ASN.1 module associated with this document to be 2008 compliant and to use the set of classes previously defined in [RFC5911]. CompressedDataContent-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-compressedDataContent(54) } DEFINITIONS IMPLICIT TAGS ::= BEGIN IMPORTS CMSVersion, ContentSet, CONTENT-TYPE FROM CryptographicMessageSyntax-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } AlgorithmIdentifier{}, SMIME-CAPS, ParamOptions FROM AlgorithmInformation-2009 {iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-algorithmInformation-02(58)} ; -- -- ContentTypes contains the set of content types that are -- defined in this module. -- -- The contents of ContentTypes should be added to -- ContentSet defined in [RFC5652] -- ContentTypes CONTENT-TYPE ::= {ct-compressedData} -- -- SMimeCaps contains the set of S/MIME capabilities that -- are associated with the algorithms defined in this -- document. -- -- SMimeCaps are added to the SMimeCapsSet defined in -- [RFC5751] as updated by [RFC5911]. SMimeCaps SMIME-CAPS ::= {cpa-zlibCompress.&smimeCaps, ...} Schaad & Turner Informational [Page 5]
RFC 6268 Additional New ASN.1 Modules July 2011 -- -- Define the compressed data content type -- ct-compressedData CONTENT-TYPE ::= { TYPE CompressedData IDENTIFIED BY id-ct-compressedData } CompressedData ::= SEQUENCE { version CMSVersion (v0), -- Always set to 0 compressionAlgorithm CompressionAlgorithmIdentifier, encapContentInfo EncapsulatedContentInfo } EncapsulatedContentInfo ::= SEQUENCE { eContentType CONTENT-TYPE.&id({ContentSet}), eContent [0] EXPLICIT OCTET STRING OPTIONAL } CompressionAlgorithmIdentifier ::= AlgorithmIdentifier{COMPRESS-ALGORITHM, {CompressAlgorithmSet}} CompressAlgorithmSet COMPRESS-ALGORITHM ::= { cpa-zlibCompress, ... } -- Algorithm Identifiers id-alg-zlibCompress OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) alg(3) 8 } cpa-zlibCompress COMPRESS-ALGORITHM ::= { IDENTIFIER id-alg-zlibCompress PARAMS TYPE NULL ARE preferredAbsent SMIME-CAPS {IDENTIFIED BY id-alg-zlibCompress} } -- Content Type Object Identifiers id-ct-compressedData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) ct(1) 9 } -- -- Class defined for compression algorithms -- Schaad & Turner Informational [Page 6]
RFC 6268 Additional New ASN.1 Modules July 2011 COMPRESS-ALGORITHM ::= CLASS { &id OBJECT IDENTIFIER UNIQUE, &Params OPTIONAL, ¶mPresence ParamOptions DEFAULT absent, &smimeCaps SMIME-CAPS OPTIONAL } WITH SYNTAX { IDENTIFIER &id [PARAMS [TYPE &Params] ARE ¶mPresence] [SMIME-CAPS &smimeCaps] } END 3. ASN.1 Module RFC 3779 We have updated the ASN.1 module associated with RFC 3779 to be ASN.1 2008 compliant and to use the set of classes previously defined in [RFC5912]. IPAddrAndASCertExtn-2010 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) mod(0) id-mod-ip-addr-and-as-ident-2(72) } DEFINITIONS EXPLICIT TAGS ::= BEGIN EXPORTS ALL; IMPORTS -- PKIX specific OIDs and arcs -- id-pe FROM PKIX1Explicit-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkix1-explicit-02(51)} EXTENSION FROM PKIX-CommonTypes-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkixCommon-02(57)} ; Schaad & Turner Informational [Page 7]
RFC 6268 Additional New ASN.1 Modules July 2011 -- -- Extensions contains the set of extensions defined in this -- module -- -- These are intended to be placed in public key certificates -- and thus should be added to the CertExtensions extension -- set in PKIXImplicit-2009 defined for [RFC5280] -- Extensions EXTENSION ::= { ext-pe-ipAddrBlocks | ext-pe-autonomousSysIds } -- IP Address Delegation Extension OID -- ext-pe-ipAddrBlocks EXTENSION ::= { SYNTAX IPAddrBlocks IDENTIFIED BY id-pe-ipAddrBlocks } id-pe-ipAddrBlocks OBJECT IDENTIFIER ::= { id-pe 7 } -- IP Address Delegation Extension Syntax -- IPAddrBlocks ::= SEQUENCE OF IPAddressFamily IPAddressFamily ::= SEQUENCE { -- AFI & opt SAFI -- addressFamily OCTET STRING (SIZE (2..3)), ipAddressChoice IPAddressChoice } IPAddressChoice ::= CHOICE { inherit NULL, -- inherit from issuer -- addressesOrRanges SEQUENCE OF IPAddressOrRange } IPAddressOrRange ::= CHOICE { addressPrefix IPAddress, addressRange IPAddressRange } IPAddressRange ::= SEQUENCE { min IPAddress, max IPAddress } IPAddress ::= BIT STRING Schaad & Turner Informational [Page 8]
RFC 6268 Additional New ASN.1 Modules July 2011 -- Autonomous System Identifier Delegation Extension OID -- ext-pe-autonomousSysIds EXTENSION ::= { SYNTAX ASIdentifiers IDENTIFIED BY id-pe-autonomousSysIds } id-pe-autonomousSysIds OBJECT IDENTIFIER ::= { id-pe 8 } -- Autonomous System Identifier Delegation Extension Syntax -- ASIdentifiers ::= SEQUENCE { asnum [0] ASIdentifierChoice OPTIONAL, rdi [1] ASIdentifierChoice OPTIONAL } (WITH COMPONENTS {..., asnum PRESENT} | WITH COMPONENTS {..., rdi PRESENT}) ASIdentifierChoice ::= CHOICE { inherit NULL, -- inherit from issuer -- asIdsOrRanges SEQUENCE OF ASIdOrRange } ASIdOrRange ::= CHOICE { id ASId, range ASRange } ASRange ::= SEQUENCE { min ASId, max ASId } ASId ::= INTEGER END Schaad & Turner Informational [Page 9]
RFC 6268 Additional New ASN.1 Modules July 2011 4. ASN.1 Module RFC 6019 We have updated the ASN.1 module associated with this document to be 2008 compliant and to use the set of classes previously defined in [RFC5911]. BinarySigningTimeModule-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-binSigningTime-2009(55) } DEFINITIONS IMPLICIT TAGS ::= BEGIN IMPORTS -- From PKIX-CommonTypes-2009 [RFC5912] ATTRIBUTE FROM PKIX-CommonTypes-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkixCommon-02(57) } ; -- -- BinaryTime Definition -- -- BinaryTime contains the number seconds since -- midnight Jan 1, 1970 UTC. -- Leap seconds are EXCLUDED from the computation. -- BinaryTime ::= INTEGER (0..MAX) -- -- Signing Binary Time Attribute -- -- The binary signing time should be added to -- SignedAttributeSet and AuthAttributeSet in CMS [RFC5652] -- and to AuthEnvDataAttributeSet in [RFC5083] with the -- new modules in this document, RFC 6268. -- Schaad & Turner Informational [Page 10]
RFC 6268 Additional New ASN.1 Modules July 2011 aa-binarySigningTime ATTRIBUTE ::= { TYPE BinarySigningTime IDENTIFIED BY id-aa-binarySigningTime } id-aa-binarySigningTime OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) smime(16) aa(2) 46 } BinarySigningTime ::= BinaryTime END 5. ASN.1 Module RFC 4073 We have updated the ASN.1 module associated with this document to be 2008 compliant and to use the set of classes previously defined in [RFC5911]. ContentCollectionModule-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-context-Collect-2009(56) } DEFINITIONS IMPLICIT TAGS ::= BEGIN IMPORTS -- From CryptographicMessageSyntax-2010 [RFC6268] CONTENT-TYPE, ContentInfo FROM CryptographicMessageSyntax-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } AttributeSet{}, ATTRIBUTE FROM PKIX-CommonTypes-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkixCommon-02(57) } ; -- -- An object set of all content types defined by this module. -- This is to be added to ContentSet in the CMS module -- ContentSet CONTENT-TYPE ::= { ct-ContentCollection | ct-ContentWithAttributes, ... } Schaad & Turner Informational [Page 11]
RFC 6268 Additional New ASN.1 Modules July 2011 -- -- Content Collection Content Type and Object Identifier -- ct-ContentCollection CONTENT-TYPE ::= { TYPE ContentCollection IDENTIFIED BY id-ct-contentCollection } id-ct-contentCollection OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) ct(1) 19 } ContentCollection ::= SEQUENCE SIZE (1..MAX) OF ContentInfo -- -- Content With Attributes Content Type and Object Identifier -- ct-ContentWithAttributes CONTENT-TYPE ::= { TYPE ContentWithAttributes IDENTIFIED BY id-ct-contentWithAttrs } id-ct-contentWithAttrs OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) ct(1) 20 } ContentWithAttributes ::= SEQUENCE { content ContentInfo, attrs SEQUENCE SIZE (1..MAX) OF AttributeSet {{ ContentAttributeSet }} } ContentAttributeSet ATTRIBUTE ::= { ... } END 6. ASN.1 Module RFC 4231 RFC 4231 does not contain an ASN.1 module to be updated. We have therefore created an ASN.1 module to represent the ASN.1 that is present in the document. Note that the parameters are defined as expecting a parameter for the algorithm identifiers in this module; this is different from most of the algorithms used in PKIX and S/MIME. There is no concept of being able to truncate the MAC (Message Authentication Code) value in the ASN.1 unlike the XML definitions. This is reflected by not having a minimum MAC length defined in the ASN.1. Schaad & Turner Informational [Page 12]
RFC 6268 Additional New ASN.1 Modules July 2011 HMAC-2010 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) mod(0) id-mod-hmac(74) } DEFINITIONS EXPLICIT TAGS ::= BEGIN EXPORTS ALL; IMPORTS MAC-ALGORITHM, SMIME-CAPS FROM AlgorithmInformation-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-algorithmInformation-02(58)}; -- -- This object set contains all of the MAC algorithms that are -- defined in this module. -- One would add it to a constraining set of objects such as the -- MessageAuthenticationCodeAlgorithmSet in [RFC5652] -- MessageAuthAlgs MAC-ALGORITHM ::= { maca-hMAC-SHA224 | maca-hMAC-SHA256 | maca-hMAC-SHA384 | maca-hMAC-SHA512 } -- -- This object set contains all of the S/MIME capabilities that -- have been defined for all the MAC algorithms in this module. -- One would add this to an object set that is used to restrict -- S/MIME capabilities such as the SMimeCapsSet variable in -- RFC 3851 (obsoleted by RFC 5751) as modified in RFC 5911. -- SMimeCaps SMIME-CAPS ::= { maca-hMAC-SHA224.&smimeCaps | maca-hMAC-SHA256.&smimeCaps | maca-hMAC-SHA384.&smimeCaps | maca-hMAC-SHA512.&smimeCaps } -- -- Define the base OID for the algorithm identifiers -- Schaad & Turner Informational [Page 13]
RFC 6268 Additional New ASN.1 Modules July 2011 rsadsi OBJECT IDENTIFIER ::= {iso(1) member-body(2) us(840) rsadsi(113549)} digestAlgorithm OBJECT IDENTIFIER ::= {rsadsi 2} -- -- Define the necessary algorithm identifiers -- id-hmacWithSHA224 OBJECT IDENTIFIER ::= {digestAlgorithm 8} id-hmacWithSHA256 OBJECT IDENTIFIER ::= {digestAlgorithm 9} id-hmacWithSHA384 OBJECT IDENTIFIER ::= {digestAlgorithm 10} id-hmacWithSHA512 OBJECT IDENTIFIER ::= {digestAlgorithm 11} -- -- Define each of the MAC-ALGORITHM objects to describe the -- algorithms defined -- maca-hMAC-SHA224 MAC-ALGORITHM ::= { IDENTIFIER id-hmacWithSHA224 PARAMS TYPE NULL ARE preferredPresent IS-KEYED-MAC TRUE SMIME-CAPS {IDENTIFIED BY id-hmacWithSHA224} } maca-hMAC-SHA256 MAC-ALGORITHM ::= { IDENTIFIER id-hmacWithSHA256 PARAMS TYPE NULL ARE preferredPresent IS-KEYED-MAC TRUE SMIME-CAPS {IDENTIFIED BY id-hmacWithSHA256} } maca-hMAC-SHA384 MAC-ALGORITHM ::= { IDENTIFIER id-hmacWithSHA384 PARAMS TYPE NULL ARE preferredPresent IS-KEYED-MAC TRUE SMIME-CAPS {IDENTIFIED BY id-hmacWithSHA384} } Schaad & Turner Informational [Page 14]
RFC 6268 Additional New ASN.1 Modules July 2011 maca-hMAC-SHA512 MAC-ALGORITHM ::= { IDENTIFIER id-hmacWithSHA512 PARAMS TYPE NULL ARE preferredPresent IS-KEYED-MAC TRUE SMIME-CAPS {IDENTIFIED BY id-hmacWithSHA512} } END 7. ASN.1 Module RFC 4334 We have updated the ASN.1 module associated with RFC 4334 to be ASN.1 2008 compliant and to use the set of classes previously defined in [RFC5912]. WLANCertExtn-2010 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-wlan-extns-2(73) } DEFINITIONS IMPLICIT TAGS ::= BEGIN EXPORTS ALL; IMPORTS EXTENSION, ATTRIBUTE FROM PKIX-CommonTypes-2009 {iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkixCommon-02(57)} id-pe, id-kp FROM PKIX1Explicit-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkix1-explicit-02(51)} id-aca FROM PKIXAttributeCertificate-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-attribute-cert-02(47)} ; -- Extended Key Usage Values KeyUsageValues OBJECT IDENTIFIER ::= { id-kp-eapOverPPP | id-kp-eapOverLAN } Schaad & Turner Informational [Page 15]
RFC 6268 Additional New ASN.1 Modules July 2011 id-kp-eapOverPPP OBJECT IDENTIFIER ::= { id-kp 13 } id-kp-eapOverLAN OBJECT IDENTIFIER ::= { id-kp 14 } -- Wireless LAN SSID Extension ext-pe-wlanSSID EXTENSION ::= { SYNTAX SSIDList IDENTIFIED BY id-pe-wlanSSID CRITICALITY {FALSE} } id-pe-wlanSSID OBJECT IDENTIFIER ::= { id-pe 13 } SSIDList ::= SEQUENCE SIZE (1..MAX) OF SSID SSID ::= OCTET STRING (SIZE (1..32)) -- Wireless LAN SSID Attribute Certificate Attribute -- Uses same syntax as the certificate extension: SSIDList at-aca-wlanSSID ATTRIBUTE ::= { TYPE SSIDList IDENTIFIED BY id-aca-wlanSSID } id-aca-wlanSSID OBJECT IDENTIFIER ::= { id-aca 7 } END 8. ASN.1 Module RFC 5083 This module is updated from RFC 5911 [RFC5911] by the following changes: 1. Define separate attribute sets for the unprotected attributes used in EnvelopedData, EncryptedData, and AuthenticatedEnvelopedData (RFC 5083). 2. Define a parameterized type EncryptedContentInfoType so that the basic type can be used with different algorithm sets (used for EnvelopedData, EncryptedData, and AuthenticatedEnvelopedData (RFC Schaad & Turner Informational [Page 16]
RFC 6268 Additional New ASN.1 Modules July 2011 5083)). The parameterized type is assigned to an unparameterized type of EncryptedContentInfo to minimize the output changes from previous versions. Protocol designers can make use of the '08 ASN.1 constraints to define different sets of attributes for EncryptedData and EnvelopedData and for AuthenticatedData and AuthEnvelopedData. Previously, attributes could only be constrained based on whether they were in the clear or unauthenticated not on the encapsulating content type. CMS-AuthEnvelopedData-2010 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cmsAuthEnvData-2009(57) } DEFINITIONS IMPLICIT TAGS ::= BEGIN IMPORTS CMSVersion, EncryptedContentInfoType{}, MessageAuthenticationCode, OriginatorInfo, RecipientInfos, CONTENT-TYPE, Attributes{}, ATTRIBUTE, CONTENT-ENCRYPTION, AlgorithmIdentifier{}, aa-signingTime, aa-messageDigest, aa-contentType FROM CryptographicMessageSyntax-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } ContentEncryptionAlgs FROM CMS-AES-CCM-and-AES-GCM-2009 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-aes-ccm-gcm-02(44) } ; ContentTypes CONTENT-TYPE ::= {ct-authEnvelopedData, ... } ct-authEnvelopedData CONTENT-TYPE ::= { TYPE AuthEnvelopedData IDENTIFIED BY id-ct-authEnvelopedData } id-ct-authEnvelopedData OBJECT IDENTIFIER ::= {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) ct(1) 23} AuthEnvelopedData ::= SEQUENCE { version CMSVersion, originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL, recipientInfos RecipientInfos, authEncryptedContentInfo EncryptedContentInfo, Schaad & Turner Informational [Page 17]
RFC 6268 Additional New ASN.1 Modules July 2011 authAttrs [1] IMPLICIT AuthAttributes OPTIONAL, mac MessageAuthenticationCode, unauthAttrs [2] IMPLICIT UnauthAttributes OPTIONAL } EncryptedContentInfo ::= EncryptedContentInfoType { AuthContentEncryptionAlgorithmIdentifier } AuthContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier {CONTENT-ENCRYPTION, {AuthContentEncryptionAlgorithmSet}} AuthContentEncryptionAlgorithmSet CONTENT-ENCRYPTION ::= { ContentEncryptionAlgs, ...} AuthAttributes ::= Attributes{{AuthEnvDataAttributeSet}} UnauthAttributes ::= Attributes{{UnauthEnvDataAttributeSet}} AuthEnvDataAttributeSet ATTRIBUTE ::= { aa-contentType | aa-messageDigest | aa-signingTime, ... } UnauthEnvDataAttributeSet ATTRIBUTE ::= {...} END 9. ASN.1 Module RFC 5652 This module is updated from RFC 5911 [RFC5911] by the following changes: 1. Define separate attribute sets for the unprotected attributes used in EnvelopedData, EncryptedData, and AuthenticatedEnvelopedData (RFC 5083). 2. Define a parameterized type EncryptedContentInfoType so that the basic type can be used with algorithm sets (used for EnvelopedData, EncryptedData, and AuthenticatedEnvelopedData (RFC 5083)). The parameterized type is assigned to an unparameterized type of EncryptedContentInfo to minimize the output changes from previous versions. We are anticipating the definition of attributes that are going to be restricted to the use of only EnvelopedData. We are therefore separating the different attribute sets so that protocol designers that need to do this will be able to define attributes that are used for EnvelopedData, but not for EncryptedData. The same separation is also being applied to AuthenticatedData and AuthEnvelopedData. Schaad & Turner Informational [Page 18]
RFC 6268 Additional New ASN.1 Modules July 2011 CryptographicMessageSyntax-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } DEFINITIONS IMPLICIT TAGS ::= BEGIN IMPORTS ParamOptions, DIGEST-ALGORITHM, SIGNATURE-ALGORITHM, PUBLIC-KEY, KEY-DERIVATION, KEY-WRAP, MAC-ALGORITHM, KEY-AGREE, KEY-TRANSPORT, CONTENT-ENCRYPTION, ALGORITHM, AlgorithmIdentifier{} FROM AlgorithmInformation-2009 {iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-algorithmInformation-02(58)} SignatureAlgs, MessageDigestAlgs, KeyAgreementAlgs, MessageAuthAlgs, KeyWrapAlgs, ContentEncryptionAlgs, KeyTransportAlgs, KeyDerivationAlgs, KeyAgreePublicKeys FROM CryptographicMessageSyntaxAlgorithms-2009 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cmsalg-2001-02(37) } Certificate, CertificateList, CertificateSerialNumber, Name, ATTRIBUTE FROM PKIX1Explicit-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkix1-explicit-02(51) } AttributeCertificate FROM PKIXAttributeCertificate-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-attribute-cert-02(47) } AttributeCertificateV1 FROM AttributeCertificateVersion1-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-v1AttrCert-02(49) } ; Schaad & Turner Informational [Page 19]
RFC 6268 Additional New ASN.1 Modules July 2011 -- Cryptographic Message Syntax -- The following are used for version numbers using the ASN.1 -- NOTE: The document reference represents where the versioned -- feature was introduced to the module. -- -- idiom "[[n:" -- Version 1 = PKCS #7 -- Version 2 = S/MIME V2 -- Version 3 = RFC 2630 -- Version 4 = RFC 3369 -- Version 5 = RFC 3852 CONTENT-TYPE ::= CLASS { &id OBJECT IDENTIFIER UNIQUE, &Type OPTIONAL } WITH SYNTAX { [TYPE &Type] IDENTIFIED BY &id } ContentType ::= CONTENT-TYPE.&id ContentInfo ::= SEQUENCE { contentType CONTENT-TYPE. &id({ContentSet}), content [0] EXPLICIT CONTENT-TYPE. &Type({ContentSet}{@contentType})} ContentSet CONTENT-TYPE ::= { -- Define the set of content types to be recognized. ct-Data | ct-SignedData | ct-EncryptedData | ct-EnvelopedData | ct-AuthenticatedData | ct-DigestedData, ... } SignedData ::= SEQUENCE { version CMSVersion, digestAlgorithms SET OF DigestAlgorithmIdentifier, encapContentInfo EncapsulatedContentInfo, certificates [0] IMPLICIT CertificateSet OPTIONAL, crls [1] IMPLICIT RevocationInfoChoices OPTIONAL, signerInfos SignerInfos } SignerInfos ::= SET OF SignerInfo EncapsulatedContentInfo ::= SEQUENCE { eContentType CONTENT-TYPE.&id({ContentSet}), eContent [0] EXPLICIT OCTET STRING ( CONTAINING CONTENT-TYPE. &Type({ContentSet}{@eContentType})) OPTIONAL } Schaad & Turner Informational [Page 20]
RFC 6268 Additional New ASN.1 Modules July 2011 SignerInfo ::= SEQUENCE { version CMSVersion, sid SignerIdentifier, digestAlgorithm DigestAlgorithmIdentifier, signedAttrs [0] IMPLICIT SignedAttributes OPTIONAL, signatureAlgorithm SignatureAlgorithmIdentifier, signature SignatureValue, unsignedAttrs [1] IMPLICIT Attributes {{UnsignedAttributes}} OPTIONAL } SignedAttributes ::= Attributes {{ SignedAttributesSet }} SignerIdentifier ::= CHOICE { issuerAndSerialNumber IssuerAndSerialNumber, ..., [[3: subjectKeyIdentifier [0] SubjectKeyIdentifier ]] } SignedAttributesSet ATTRIBUTE ::= { aa-signingTime | aa-messageDigest | aa-contentType, ... } UnsignedAttributes ATTRIBUTE ::= { aa-countersignature, ... } SignatureValue ::= OCTET STRING EnvelopedData ::= SEQUENCE { version CMSVersion, originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL, recipientInfos RecipientInfos, encryptedContentInfo EncryptedContentInfo, ..., [[2: unprotectedAttrs [1] IMPLICIT Attributes {{ UnprotectedEnvAttributes }} OPTIONAL ]] } OriginatorInfo ::= SEQUENCE { certs [0] IMPLICIT CertificateSet OPTIONAL, crls [1] IMPLICIT RevocationInfoChoices OPTIONAL } RecipientInfos ::= SET SIZE (1..MAX) OF RecipientInfo EncryptedContentInfo ::= EncryptedContentInfoType { ContentEncryptionAlgorithmIdentifier } EncryptedContentInfoType { AlgorithmIdentifierType } ::= SEQUENCE { contentType CONTENT-TYPE.&id({ContentSet}), contentEncryptionAlgorithm AlgorithmIdentifierType, encryptedContent [0] IMPLICIT OCTET STRING OPTIONAL } Schaad & Turner Informational [Page 21]
RFC 6268 Additional New ASN.1 Modules July 2011 -- If you want to do constraints, you might use: -- EncryptedContentInfo ::= SEQUENCE { -- contentType CONTENT-TYPE.&id({ContentSet}), -- contentEncryptionAlgorithm ContentEncryptionAlgorithmIdentifier, -- encryptedContent [0] IMPLICIT ENCRYPTED {CONTENT-TYPE. -- &Type({ContentSet}{@contentType}) OPTIONAL } -- ENCRYPTED {ToBeEncrypted} ::= OCTET STRING ( CONSTRAINED BY -- { ToBeEncrypted } ) UnprotectedEnvAttributes ATTRIBUTE ::= { ... } UnprotectedEncAttributes ATTRIBUTE ::= { ... } RecipientInfo ::= CHOICE { ktri KeyTransRecipientInfo, ..., [[3: kari [1] KeyAgreeRecipientInfo ]], [[4: kekri [2] KEKRecipientInfo]], [[5: pwri [3] PasswordRecipientInfo, ori [4] OtherRecipientInfo ]] } EncryptedKey ::= OCTET STRING KeyTransRecipientInfo ::= SEQUENCE { version CMSVersion, -- always set to 0 or 2 rid RecipientIdentifier, keyEncryptionAlgorithm AlgorithmIdentifier {KEY-TRANSPORT, {KeyTransportAlgorithmSet}}, encryptedKey EncryptedKey } KeyTransportAlgorithmSet KEY-TRANSPORT ::= { KeyTransportAlgs, ... } RecipientIdentifier ::= CHOICE { issuerAndSerialNumber IssuerAndSerialNumber, ..., [[2: subjectKeyIdentifier [0] SubjectKeyIdentifier ]] } KeyAgreeRecipientInfo ::= SEQUENCE { version CMSVersion, -- always set to 3 originator [0] EXPLICIT OriginatorIdentifierOrKey, ukm [1] EXPLICIT UserKeyingMaterial OPTIONAL, keyEncryptionAlgorithm AlgorithmIdentifier {KEY-AGREE, {KeyAgreementAlgorithmSet}}, recipientEncryptedKeys RecipientEncryptedKeys } KeyAgreementAlgorithmSet KEY-AGREE ::= { KeyAgreementAlgs, ... } Schaad & Turner Informational [Page 22]
RFC 6268 Additional New ASN.1 Modules July 2011 OriginatorIdentifierOrKey ::= CHOICE { issuerAndSerialNumber IssuerAndSerialNumber, subjectKeyIdentifier [0] SubjectKeyIdentifier, originatorKey [1] OriginatorPublicKey } OriginatorPublicKey ::= SEQUENCE { algorithm AlgorithmIdentifier {PUBLIC-KEY, {OriginatorKeySet}}, publicKey BIT STRING } OriginatorKeySet PUBLIC-KEY ::= { KeyAgreePublicKeys, ... } RecipientEncryptedKeys ::= SEQUENCE OF RecipientEncryptedKey RecipientEncryptedKey ::= SEQUENCE { rid KeyAgreeRecipientIdentifier, encryptedKey EncryptedKey } KeyAgreeRecipientIdentifier ::= CHOICE { issuerAndSerialNumber IssuerAndSerialNumber, rKeyId [0] IMPLICIT RecipientKeyIdentifier } RecipientKeyIdentifier ::= SEQUENCE { subjectKeyIdentifier SubjectKeyIdentifier, date GeneralizedTime OPTIONAL, other OtherKeyAttribute OPTIONAL } SubjectKeyIdentifier ::= OCTET STRING KEKRecipientInfo ::= SEQUENCE { version CMSVersion, -- always set to 4 kekid KEKIdentifier, keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier, encryptedKey EncryptedKey } KEKIdentifier ::= SEQUENCE { keyIdentifier OCTET STRING, date GeneralizedTime OPTIONAL, other OtherKeyAttribute OPTIONAL } PasswordRecipientInfo ::= SEQUENCE { version CMSVersion, -- always set to 0 keyDerivationAlgorithm [0] KeyDerivationAlgorithmIdentifier OPTIONAL, keyEncryptionAlgorithm KeyEncryptionAlgorithmIdentifier, encryptedKey EncryptedKey } OTHER-RECIPIENT ::= TYPE-IDENTIFIER Schaad & Turner Informational [Page 23]
RFC 6268 Additional New ASN.1 Modules July 2011 OtherRecipientInfo ::= SEQUENCE { oriType OTHER-RECIPIENT. &id({SupportedOtherRecipInfo}), oriValue OTHER-RECIPIENT. &Type({SupportedOtherRecipInfo}{@oriType})} SupportedOtherRecipInfo OTHER-RECIPIENT ::= { ... } DigestedData ::= SEQUENCE { version CMSVersion, digestAlgorithm DigestAlgorithmIdentifier, encapContentInfo EncapsulatedContentInfo, digest Digest, ... } Digest ::= OCTET STRING EncryptedData ::= SEQUENCE { version CMSVersion, encryptedContentInfo EncryptedContentInfo, ..., [[2: unprotectedAttrs [1] IMPLICIT Attributes {{UnprotectedEncAttributes}} OPTIONAL ]] } AuthenticatedData ::= SEQUENCE { version CMSVersion, originatorInfo [0] IMPLICIT OriginatorInfo OPTIONAL, recipientInfos RecipientInfos, macAlgorithm MessageAuthenticationCodeAlgorithm, digestAlgorithm [1] DigestAlgorithmIdentifier OPTIONAL, encapContentInfo EncapsulatedContentInfo, authAttrs [2] IMPLICIT AuthAttributes OPTIONAL, mac MessageAuthenticationCode, unauthAttrs [3] IMPLICIT UnauthAttributes OPTIONAL } AuthAttributes ::= SET SIZE (1..MAX) OF Attribute {{AuthAttributeSet}} AuthAttributeSet ATTRIBUTE ::= { aa-contentType | aa-messageDigest | aa-signingTime, ...} MessageAuthenticationCode ::= OCTET STRING UnauthAttributes ::= SET SIZE (1..MAX) OF Attribute {{UnauthAttributeSet}} UnauthAttributeSet ATTRIBUTE ::= {...} Schaad & Turner Informational [Page 24]
RFC 6268 Additional New ASN.1 Modules July 2011 -- -- General algorithm definitions -- DigestAlgorithmIdentifier ::= AlgorithmIdentifier {DIGEST-ALGORITHM, {DigestAlgorithmSet}} DigestAlgorithmSet DIGEST-ALGORITHM ::= { CryptographicMessageSyntaxAlgorithms-2009.MessageDigestAlgs, ... } SignatureAlgorithmIdentifier ::= AlgorithmIdentifier {SIGNATURE-ALGORITHM, {SignatureAlgorithmSet}} SignatureAlgorithmSet SIGNATURE-ALGORITHM ::= { SignatureAlgs, ... } KeyEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier {KEY-WRAP, {KeyEncryptionAlgorithmSet}} KeyEncryptionAlgorithmSet KEY-WRAP ::= { KeyWrapAlgs, ... } ContentEncryptionAlgorithmIdentifier ::= AlgorithmIdentifier {CONTENT-ENCRYPTION, {ContentEncryptionAlgorithmSet}} ContentEncryptionAlgorithmSet CONTENT-ENCRYPTION ::= { ContentEncryptionAlgs, ... } MessageAuthenticationCodeAlgorithm ::= AlgorithmIdentifier {MAC-ALGORITHM, {MessageAuthenticationCodeAlgorithmSet}} MessageAuthenticationCodeAlgorithmSet MAC-ALGORITHM ::= { MessageAuthAlgs, ... } KeyDerivationAlgorithmIdentifier ::= AlgorithmIdentifier {KEY-DERIVATION, {KeyDerivationAlgs, ...}} RevocationInfoChoices ::= SET OF RevocationInfoChoice RevocationInfoChoice ::= CHOICE { crl CertificateList, ..., [[5: other [1] IMPLICIT OtherRevocationInfoFormat ]] } OTHER-REVOK-INFO ::= TYPE-IDENTIFIER Schaad & Turner Informational [Page 25]
RFC 6268 Additional New ASN.1 Modules July 2011 OtherRevocationInfoFormat ::= SEQUENCE { otherRevInfoFormat OTHER-REVOK-INFO. &id({SupportedOtherRevokInfo}), otherRevInfo OTHER-REVOK-INFO. &Type({SupportedOtherRevokInfo}{@otherRevInfoFormat})} SupportedOtherRevokInfo OTHER-REVOK-INFO ::= { ... } CertificateChoices ::= CHOICE { certificate Certificate, extendedCertificate [0] IMPLICIT ExtendedCertificate, -- Obsolete ..., [[3: v1AttrCert [1] IMPLICIT AttributeCertificateV1]], -- Obsolete [[4: v2AttrCert [2] IMPLICIT AttributeCertificateV2]], [[5: other [3] IMPLICIT OtherCertificateFormat]] } AttributeCertificateV2 ::= AttributeCertificate OTHER-CERT-FMT ::= TYPE-IDENTIFIER OtherCertificateFormat ::= SEQUENCE { otherCertFormat OTHER-CERT-FMT. &id({SupportedCertFormats}), otherCert OTHER-CERT-FMT. &Type({SupportedCertFormats}{@otherCertFormat})} SupportedCertFormats OTHER-CERT-FMT ::= { ... } CertificateSet ::= SET OF CertificateChoices IssuerAndSerialNumber ::= SEQUENCE { issuer Name, serialNumber CertificateSerialNumber } CMSVersion ::= INTEGER { v0(0), v1(1), v2(2), v3(3), v4(4), v5(5) } UserKeyingMaterial ::= OCTET STRING KEY-ATTRIBUTE ::= TYPE-IDENTIFIER OtherKeyAttribute ::= SEQUENCE { keyAttrId KEY-ATTRIBUTE. &id({SupportedKeyAttributes}), keyAttr KEY-ATTRIBUTE. &Type({SupportedKeyAttributes}{@keyAttrId})} Schaad & Turner Informational [Page 26]
RFC 6268 Additional New ASN.1 Modules July 2011 SupportedKeyAttributes KEY-ATTRIBUTE ::= { ... } -- Content Type Object Identifiers id-ct-contentInfo OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) smime(16) ct(1) 6 } ct-Data CONTENT-TYPE ::= { IDENTIFIED BY id-data } id-data OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs7(7) 1 } ct-SignedData CONTENT-TYPE ::= { TYPE SignedData IDENTIFIED BY id-signedData} id-signedData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs7(7) 2 } ct-EnvelopedData CONTENT-TYPE ::= { TYPE EnvelopedData IDENTIFIED BY id-envelopedData} id-envelopedData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs7(7) 3 } ct-DigestedData CONTENT-TYPE ::= { TYPE DigestedData IDENTIFIED BY id-digestedData} id-digestedData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs7(7) 5 } ct-EncryptedData CONTENT-TYPE ::= { TYPE EncryptedData IDENTIFIED BY id-encryptedData} id-encryptedData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs7(7) 6 } ct-AuthenticatedData CONTENT-TYPE ::= { TYPE AuthenticatedData IDENTIFIED BY id-ct-authData} id-ct-authData OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) ct(1) 2 } -- -- The CMS Attributes -- MessageDigest ::= OCTET STRING Schaad & Turner Informational [Page 27]
RFC 6268 Additional New ASN.1 Modules July 2011 SigningTime ::= Time Time ::= CHOICE { utcTime UTCTime, generalTime GeneralizedTime } Countersignature ::= SignerInfo -- Attribute Object Identifiers aa-contentType ATTRIBUTE ::= { TYPE ContentType IDENTIFIED BY id-contentType } id-contentType OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) 3 } aa-messageDigest ATTRIBUTE ::= { TYPE MessageDigest IDENTIFIED BY id-messageDigest} id-messageDigest OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) 4 } aa-signingTime ATTRIBUTE ::= { TYPE SigningTime IDENTIFIED BY id-signingTime } id-signingTime OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) 5 } aa-countersignature ATTRIBUTE ::= { TYPE Countersignature IDENTIFIED BY id-countersignature } id-countersignature OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) 6 } -- -- Obsolete Extended Certificate syntax from PKCS#6 -- ExtendedCertificateOrCertificate ::= CHOICE { certificate Certificate, extendedCertificate [0] IMPLICIT ExtendedCertificate } ExtendedCertificate ::= SEQUENCE { extendedCertificateInfo ExtendedCertificateInfo, signatureAlgorithm SignatureAlgorithmIdentifier, signature Signature } ExtendedCertificateInfo ::= SEQUENCE { version CMSVersion, certificate Certificate, attributes UnauthAttributes } Schaad & Turner Informational [Page 28]
RFC 6268 Additional New ASN.1 Modules July 2011 Signature ::= BIT STRING Attribute{ ATTRIBUTE:AttrList } ::= SEQUENCE { attrType ATTRIBUTE. &id({AttrList}), attrValues SET OF ATTRIBUTE. &Type({AttrList}{@attrType}) } Attributes { ATTRIBUTE:AttrList } ::= SET SIZE (1..MAX) OF Attribute {{ AttrList }} END 10. ASN.1 Module RFC 5752 We have updated the ASN.1 module associated with this document to be 2008 compliant and to use the set of classes previously defined in [RFC5911]. MultipleSignatures-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) smime(16) modules(0) id-mod-multipleSign-2009(59) } DEFINITIONS IMPLICIT TAGS ::= BEGIN -- EXPORTS All -- The types and values defined in this module are exported for use -- in the other ASN.1 modules. Other applications may use them for -- their own purposes. IMPORTS -- Imports from PKIX-Common-Types-2009 [RFC5912] ATTRIBUTE FROM PKIX-CommonTypes-2009 { iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-pkixCommon-02(57)} -- Imports from CryptographicMessageSyntax-2010 [RFC6268] DigestAlgorithmIdentifier, SignatureAlgorithmIdentifier FROM CryptographicMessageSyntax-2010 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-cms-2009(58) } Schaad & Turner Informational [Page 29]
RFC 6268 Additional New ASN.1 Modules July 2011 -- Imports from ExtendedSecurityServices-2009 [RFC5911] ESSCertIDv2 FROM ExtendedSecurityServices-2009 { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) id-mod-ess-2006-02(42) } ; -- -- Section 3.0 -- -- at-multipleSignatures should be added ONLY to the -- SignedAttributesSet defined in [RFC5652] -- at-multipleSignatures ATTRIBUTE ::= { TYPE MultipleSignatures IDENTIFIED BY id-aa-multipleSignatures } id-aa-multipleSignatures OBJECT IDENTIFIER ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9) id-aa(2) 51 } MultipleSignatures ::= SEQUENCE { bodyHashAlg DigestAlgorithmIdentifier, signAlg SignatureAlgorithmIdentifier, signAttrsHash SignAttrsHash, cert ESSCertIDv2 OPTIONAL } SignAttrsHash ::= SEQUENCE { algID DigestAlgorithmIdentifier, hash OCTET STRING } END 11. Module Identifiers in ASN.1 One potential issue that can occur when updating modules is the fact that a large number of modules may need to be updated if they import from a newly updated module. This section addresses one method that can be used to deal with this problem, but the modules in this document don't currently implement the solution discussed here. Schaad & Turner Informational [Page 30]
RFC 6268 Additional New ASN.1 Modules July 2011 When looking at an import statement, there are three portions: The list of items imported, a textual name for the module, and an object identifier for the module. Full implementations of ASN.1 do module matching using first the object identifier, and if that is not present, the textual name of the module. Note however that some older implementations used the textual name of the module for the purposes of matching. In a full implementation, the name assigned to the module is scoped to the ASN.1 module that it appears in (and thus the need to match the module it is importing from). One can create a module that contains only the module number assignments and import the module assignments from the new module. This means that when a module is replaced, one can replace the previous module, update the module number assignment module, and recompile without having to modify any other modules. A sample module assignment module would be: ModuleNumbers DEFINITIONS TAGS ::= BEGIN id-mod-CMS ::= { iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) 58 } id-mod-AlgInfo ::= {iso(1) identified-organization(3) dod(6) internet(1) security(5) mechanisms(5) pkix(7) id-mod(0) id-mod-algorithmInformation-02(58)} END This would be used in the following import statement: IMPORTS id-mod-CMS, id-mod-AlgInfo FROM ModuleNumbers -- Note it will match on the name since no -- OID is provided CMSVersion, EncapsulatedContentInfo, CONTENT-TYPE FROM CryptographicMessageSyntax-2010 id-mod-CMS AlgorithmIdentifier{}, SMIME-CAPS, ParamOptions FROM AlgorithmInformation-2009 id-mod-AlgInfo ; Schaad & Turner Informational [Page 31]
RFC 6268 Additional New ASN.1 Modules July 2011 12. Security Considerations This document itself does not have any security considerations. The ASN.1 modules keep the same bits-on-the-wire as the modules that they replace. 13. References 13.1. Normative References [ASN1-2008] ITU-T, "ITU-T Recommendations X.680, X.681, X.682, and X.683", 2008. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3274] Gutmann, P., "Compressed Data Content Type for Cryptographic Message Syntax (CMS)", RFC 3274, June 2002. [RFC3779] Lynn, C., Kent, S., and K. Seo, "X.509 Extensions for IP Addresses and AS Identifiers", RFC 3779, June 2004. [RFC4073] Housley, R., "Protecting Multiple Contents with the Cryptographic Message Syntax (CMS)", RFC 4073, May 2005. [RFC4231] Nystrom, M., "Identifiers and Test Vectors for HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA- 512", RFC 4231, December 2005. [RFC4334] Housley, R. and T. Moore, "Certificate Extensions and Attributes Supporting Authentication in Point-to-Point Protocol (PPP) and Wireless Local Area Networks (WLAN)", RFC 4334, February 2006. [RFC5083] Housley, R., "Cryptographic Message Syntax (CMS) Authenticated-Enveloped-Data Content Type", RFC 5083, November 2007. [RFC5280] Cooper, D., Santesson, S., Farrell, S., Boeyen, S., Housley, R., and W. Polk, "Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile", RFC 5280, May 2008. [RFC5652] Housley, R., "Cryptographic Message Syntax (CMS)", STD 70, RFC 5652, September 2009. Schaad & Turner Informational [Page 32]
RFC 6268 Additional New ASN.1 Modules July 2011 [RFC5752] Turner, S. and J. Schaad, "Multiple Signatures in Cryptographic Message Syntax (CMS)", RFC 5752, January 2010. [RFC5911] Hoffman, P. and J. Schaad, "New ASN.1 Modules for Cryptographic Message Syntax (CMS) and S/MIME", RFC 5911, June 2010. [RFC5912] Hoffman, P. and J. Schaad, "New ASN.1 Modules for the Public Key Infrastructure Using X.509 (PKIX)", RFC 5912, June 2010. [RFC6019] Housley, R., "BinaryTime: An Alternate Format for Representing Date and Time in ASN.1", RFC 6019, September 2010. 13.2. Informative References [RFC5751] Ramsdell, B. and S. Turner, "Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification", RFC 5751, January 2010. [RFC6025] Wallace, C. and C. Gardiner, "ASN.1 Translation", RFC 6025, October 2010. Authors' Addresses Jim Schaad Soaring Hawk Consulting EMail: ietf@augustcellars.com Sean Turner IECA, Inc. 3057 Nutley Street, Suite 106 Fairfax, VA 22031 EMail: turners@ieca.com Schaad & Turner Informational [Page 33]