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Updates:
Keywords: ASN.1, Certficate Extensions, HMAC
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
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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.
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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].
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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, ...}
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--
-- 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
--
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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)}
;
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--
-- 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
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-- 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
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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.
--
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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, ...
}
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--
-- 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.
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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
--
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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}
}
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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
}
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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
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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,
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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.
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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) } ;
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-- 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 }
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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 }
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-- 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, ... }
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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
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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 ::= {...}
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--
-- 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
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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})}
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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
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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 }
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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) }
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-- 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.
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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
;
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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.
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[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]