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RFC 2985
PKCS #9: Selected Object Classes and Attribute Types Version 2.0.
M. Nystrom, B. Kaliski. November 2000.

 
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Network Working Group M. Nystrom Request for Comments: 2985 B. Kaliski Category: Informational RSA Security November 2000 PKCS #9: Selected Object Classes and Attribute Types Version 2.0 Status of this Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The Internet Society (2000). All Rights Reserved. Abstract This memo represents a republication of PKCS #9 v2.0 from RSA Laboratories' Public-Key Cryptography Standards (PKCS) series, and change control is retained within the PKCS process. The body of this document, except for the security considerations section, is taken directly from that specification. This memo provides a selection of object classes and attribute types for use in conjunction with public-key cryptography and Lightweight Directory Access Protocol (LDAP) accessible directories. It also includes ASN.1 syntax for all constructs. Table of Contents 1. Introduction ................................................. 2 2. Definitions, notation and document convention ................ 2 2.1 Definitions ................................................. 2 2.2 Notation and document convention ............................ 3 3. Overview ..................................................... 4 4. Auxiliary object classes ..................................... 5 4.1 The "pkcsEntity" auxiliary object class ..................... 5 4.2 The "naturalPerson" auxiliary object class .................. 6 5. Selected attribute types ..................................... 6 5.1 Attribute types for use with the "pkcsEntity" object class .. 6 5.2 Attribute types for use with the "naturalPerson" object class 7 5.3 Attribute types for use in PKCS #7 data .................... 12 5.4 Attribute types for use in PKCS #10 certificate requests ... 16 Nystrom & Kaliski Informational [Page 1]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.5 Attribute types for use in PKCS #12 "PFX" PDUs or PKCS #15 tokens ..................................................... 17 5.6 Attributes defined in S/MIMIE .............................. 18 6. Matching rules .............................................. 19 6.1 Case ignore match .......................................... 19 6.2 Signing time match ......................................... 20 7. Security Considerations ..................................... 20 8. Authors' Addresses .......................................... 21 A. ASN.1 module ................................................ 22 B. BNF schema summary .......................................... 30 B.1 Syntaxes ................................................... 30 B.2 Object classes ............................................. 31 B.3 Attribute types ............................................ 32 B.4 Matching rules ............................................. 36 C. Intellectual property considerations ........................ 37 D. Revision history ............................................ 37 E. References .................................................. 39 F. Contact information & About PKCS ............................ 41 Full Copyright Statement ........................................ 41 1. Introduction This document defines two new auxiliary object classes, pkcsEntity and naturalPerson, and selected attribute types for use with these classes. It also defines some attribute types for use in conjunction with PKCS #7 [14] (and S/MIME CMS [3]) digitally signed messages, PKCS #10 [16] certificate-signing requests, PKCS #12 [17] personal information exchanges and PKCS #15 [18] cryptographic tokens. Matching rules for use with these attributes are also defined, whenever necessary. 2. Definitions, notation and document conventions 2.1 Definitions For the purposes of this document, the following definitions apply. ASN.1 Abstract Syntax Notation One, as defined in [5]. Attributes An ASN.1 type that specifies a set of attributes. Each attribute contains an attribute type (specified by object identifier) and one or more attribute values. Some attribute types are restricted in their definition to have a single value; others may have multiple values. This type is defined in [7]. Nystrom & Kaliski Informational [Page 2]
RFC 2985 Selected Object Classes and Attribute Types November 2000 CertificationRequestInfo An ASN.1 type that specifies a subject name, a public key, and a set of attributes. This type is defined in [16]. ContentInfo An ASN.1 type that specifies content exchanged between entities. The contentType field, which has type OBJECT IDENTIFIER, specifies the content type, and the content field, whose type is defined by the contentType field, contains the content value. This type is defined in [14] and [3]. PrivateKeyInfo A type that specifies a private key and a set of extended attributes. This type and the associated EncryptedPrivateKeyInfo type are defined in [15]. SignerInfo A type that specifies per-signer information in the signed-data content type, including a set of attributes authenticated by the signer, and a set of attributes not authenticated by the signer. This type is defined in [14] and [3]. DER Distinguished Encoding Rules for ASN.1, as defined in [6]. UCS Universal Multiple-Octet Coded Character Set, as defined in [11]. UTF8String UCS Transformation Format encoded string. The UTF-8 encoding is defined in [11]. 2.2 Notation and document conventions In this document, all attribute type and object class definitions are written in the ASN.1 value notation defined in [5]. Appendix B contains most of these definitions written in the augmented BNF notation defined in [2] as well. This has been done in an attempt to simplify the task of integrating this work into LDAP [22] development environments. The keywords "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [1]. Nystrom & Kaliski Informational [Page 3]
RFC 2985 Selected Object Classes and Attribute Types November 2000 3. Overview This document specifies two new auxiliary object classes, pkcsEntity and naturalPerson, and some new attribute types and matching rules. All ASN.1 object classes, attributes, matching rules and types are exported for use in other environments. Attribute types defined in this document that are useful in conjunction with storage of PKCS-related data and the pkcsEntity object class includes PKCS #12 PFX PDUs, PKCS #15 tokens and encrypted private keys. Attribute types defined in this document that are useful in conjunction with PKCS #10 certificate requests and the naturalPerson object class includes electronic-mail address, pseudonym, unstructured name, and unstructured address. Attribute types defined in this document that are useful in PKCS #7 digitally signed messages are content type, message digest, signing time, sequence number, random nonce and countersignature. The attributes would be used in the authenticatedAttributes and unauthenticatedAttributes fields of a SignerInfo or an AuthenticatedData ([3]) value. Attribute types that are useful especially in PKCS #10 certification requests are the challenge password and the extension-request attribute. The attributes would be used in the attributes field of a CertificationRequestInfo value. Note - The attributes types (from [8]) in Table 1, and probably several others, might also be helpful in PKCS #10, PKCS #12 and PKCS #15-aware applications. Nystrom & Kaliski Informational [Page 4]
RFC 2985 Selected Object Classes and Attribute Types November 2000 businessCategory preferredDeliveryMethod commonName presentationAddress countryName registeredAddress description roleOccupant destinationIndicator serialNumber facsimileTelephoneNumber stateOrProvinceName iSDNAddress streetAddress localityName supportedApplicationContext member surname objectClass telephoneNumber organizationName teletexTerminalIdentifier physicalDeliveryOfficeName telexNumber postalAddress title postalCode x121Address postOfficeBox Table 1: ISO/IEC 9594-6 attribute types useful in PKCS documents 4. Auxiliary object classes This document defines two new auxiliary object classes: pkcsEntity and naturalPerson. 4.1 The pkcsEntity auxiliary object class The pkcsEntity object class is a general-purpose auxiliary object class that is intended to hold attributes about PKCS-related entities. It has been designed for use within directory services based on the LDAP protocol [22] and the X.500 family of protocols, where support for PKCS-defined attributes is considered useful. pkcsEntity OBJECT-CLASS ::= { SUBCLASS OF { top } KIND auxiliary MAY CONTAIN { PKCSEntityAttributeSet } ID pkcs-9-oc-pkcsEntity } PKCSEntityAttributeSet ATTRIBUTE ::= { pKCS7PDU | userPKCS12 | pKCS15Token | encryptedPrivateKeyInfo, ... -- For future extensions } Attributes in the PKCSEntityAttributeSet are defined in Section 5. Nystrom & Kaliski Informational [Page 5]
RFC 2985 Selected Object Classes and Attribute Types November 2000 4.2 The naturalPerson auxiliary object class The naturalPerson object class is a general-purpose auxiliary object class that is intended to hold attributes about human beings. It has been designed for use within directory services based on the LDAP protocol [22] and the X.500 family of protocols, where support for these attributes is considered useful. naturalPerson OBJECT-CLASS ::= { SUBCLASS OF { top } KIND auxiliary MAY CONTAIN { NaturalPersonAttributeSet } ID pkcs-9-oc-naturalPerson } NaturalPersonAttributeSet ATTRIBUTE ::= { emailAddress | unstructuredName | unstructuredAddress | dateOfBirth | placeOfBirth | gender | countryOfCitizenship | countryOfResidence | pseudonym | serialNumber, ... -- For future extensions } Attributes in the NaturalPersonAttributeSet are defined in Section 5. 5. Selected attribute types 5.1 Attribute types for use with the "pkcsEntity" object class 5.1.1 PKCS #7 PDU PKCS #7 provides several formats for enveloped, signed and otherwise protected data. When such information is stored in a directory service, the pKCS7PDU attribute may be used. pKCS7PDU ATTRIBUTE ::= { WITH SYNTAX ContentInfo ID pkcs-9-at-pkcs7PDU } Nystrom & Kaliski Informational [Page 6]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.1.2 PKCS #12 token PKCS #12 provides a format for exchange of personal identity information. When such information is stored in a directory service, the userPKCS12 attribute should be used. userPKCS12 ATTRIBUTE ::= { WITH SYNTAX PFX ID pkcs-9-at-userPKCS12 } This type was originally defined in [20]. 5.1.3 PKCS #15 token PKCS #15 provides a format for cryptographic tokens. When software variants of such tokens are stored in a directory service, the pKCS15Token attribute should be used. pKCS15Token ATTRIBUTE ::= { WITH SYNTAX PKCS15Token ID pkcs-9-at-pkcs15Token } 5.1.4 PKCS #8 encrypted private key information PKCS #8 provides a format for encrypted private keys. When such information is stored in a directory service, the encryptedPrivateKeyInfo attribute should be used. encryptedPrivateKeyInfo ATTRIBUTE ::= { WITH SYNTAX EncryptedPrivateKeyInfo ID pkcs-9-at-encryptedPrivateKeyInfo } 5.2 Attribute types for use with the "naturalPerson" object class 5.2.1 Electronic-mail address The emailAddress attribute type specifies the electronic-mail address or addresses of a subject as an unstructured ASCII string. The interpretation of electronic-mail addresses is intended to be specified by certificate issuers etc.; no particular interpretation is required. Nystrom & Kaliski Informational [Page 7]
RFC 2985 Selected Object Classes and Attribute Types November 2000 emailAddress ATTRIBUTE ::= { WITH SYNTAX IA5String (SIZE(1..pkcs-9-ub-emailAddress)) EQUALITY MATCHING RULE pkcs9CaseIgnoreMatch ID pkcs-9-at-emailAdress } An electronic-mail address attribute can have multiple attribute values. When comparing two email addresses, case is irrelevant. The pkcs9CaseIgnoreMatch is defined in Section 6. Note - It is likely that other standards bodies overseeing electronic-mail systems will, or have, registered electronic-mail address attribute types specific to their system. The electronic- mail address attribute type defined here was intended as a short-term substitute for those specific attribute types, but is included here for backwards-compatibility reasons. 5.2.2 Unstructured name The unstructuredName attribute type specifies the name or names of a subject as an unstructured ASCII string. The interpretation of unstructured names is intended to be specified by certificate issuers etc.; no particular interpretation is required. unstructuredName ATTRIBUTE ::= { WITH SYNTAX PKCS9String {pkcs-9-ub-unstructuredName} EQUALITY MATCHING RULE pkcs9CaseIgnoreMatch ID pkcs-9-at-unstructuredName } PKCS9String { INTEGER : maxSize} ::= CHOICE { ia5String IA5String (SIZE(1..maxSize)), directoryString DirectoryString {maxSize} } An unstructured-name attribute can have multiple attribute values. When comparing two unstructured names, case is irrelevant. The PKCS9String type is defined as a choice of IA5String and DirectoryString. Applications SHOULD use the IA5String type when generating attribute values in accordance with this version of this document, unless internationalization issues makes this impossible. In that case, the UTF8String alternative of the DirectoryString alternative is the preferred choice. PKCS #9-attribute processing systems MUST be able to recognize and process all string types in PKCS9String values. Nystrom & Kaliski Informational [Page 8]
RFC 2985 Selected Object Classes and Attribute Types November 2000 Note - Version 1.1 of this document defined unstructuredName as having the syntax IA5String, but did contain a note explaining that this might be changed to a CHOICE of different string types in future versions. To better accommodate international names, this type has been extended to also include a directory string in this version of this document. Since [21] does not support a directory string type containing IA5Strings, a separate syntax object identifier has been defined (see [21] and Appendix B). 5.2.3 Unstructured address The unstructuredAddress attribute type specifies the address or addresses of a subject as an unstructured directory string. The interpretation of unstructured addresses is intended to be specified by certificate issuers etc; no particular interpretation is required. A likely interpretation is as an alternative to the postalAddress attribute type defined in [8]. unstructuredAddress ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-unstructuredAddress} EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-unstructuredAddress } An unstructured-address attribute can have multiple attribute values. The caseIgnoreMatch matching rule is defined in [8]. Note 1 - It is recommended to use the ASN.1 type TeletexString's new-line character (hexadecimal code 0d) as a line separator in multi-line addresses. Note 2 - Previous versions of this document defined unstructuredAddress as having the following syntax: CHOICE { teletexString TeletexString, printableString PrintableString, } But also mentioned the possibility of a future definition as follows: CHOICE { teletexString TeletexString, printableString PrintableString, universalString UniversalString } Nystrom & Kaliski Informational [Page 9]
RFC 2985 Selected Object Classes and Attribute Types November 2000 In this version of this document, the X.520 type DirectoryString has been used in order to be more aligned with international standards and current practice. When generating attribute values in accordance with this version of this document, applications SHOULD use the PrintableString alternative unless internationalization issues makes this impossible. In those cases, the UTF8String alternative SHOULD be used. PKCS #9-attribute processing systems MUST be able to recognize and process all string types in DirectoryString values. 5.2.4 Date of birth The dateOfBirth attribute specifies the date of birth for the subject it is associated with. dateOfBirth ATTRIBUTE ::= { WITH SYNTAX GeneralizedTime EQUALITY MATCHING RULE generalizedTimeMatch SINGLE VALUE TRUE ID pkcs-9-at-dateOfBirth } dateOfBirth attributes must be single-valued. The generalizedTimeMatch matching rule is defined in [8]. 5.2.5 Place of birth The placeOfBirth attribute specifies the place of birth for the subject it is associated with. placeOfBirth ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-placeOfBirth} EQUALITY MATCHING RULE caseExactMatch SINGLE VALUE TRUE ID pkcs-9-at-placeOfBirth } placeOfBirth attributes must be single-valued. The caseExactMatch matching rule is defined in [8]. Nystrom & Kaliski Informational [Page 10]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.2.6 Gender The gender attribute specifies the gender of the subject it is associated with. gender ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(1) ^ FROM ("M" | "F" | "m" | "f")) EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-gender } The letter "M" (or "m") represents "male" and the letter "F" (or "f") represents "female". gender attributes must be single-valued. 5.2.7 Country of citizenship The countryOfCitizenship attribute specifies the (claimed) countries of citizenship for the subject it is associated with. It SHALL be a 2-letter acronym of a country in accordance with [4]. countryOfCitizenship ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(2) ^ CONSTRAINED BY { -- Must be a two-letter country acronym in accordance with -- ISO/IEC 3166 --}) EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-countryOfCitizenship } Attributes of this type need not be single-valued. 5.2.8 Country of residence The countryOfResidence attribute specifies the (claimed) country of residence for the subject is associated with. It SHALL be a 2-letter acronym of a country in accordance with [4]. countryOfResidence ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(2) ^ CONSTRAINED BY { -- Must be a two-letter country acronym in accordance with -- ISO/IEC 3166 --}) EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-countryOfResidence } Attributes of this type need not be single-valued, since it is possible to be a resident of several countries. Nystrom & Kaliski Informational [Page 11]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.2.9 Pseudonym The pseudonym attribute type shall contain a pseudonym of a subject. The exact interpretation of pseudonyms is intended to be specified by certificate issuers etc.; no particular interpretation is required. pseudonym ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-pseudonym} EQUALITY MATCHING RULE caseExactMatch ID id-at-pseudonym } Note - The pseudonym attribute has received an object identifier in the joint-iso-itu-t object identifier tree. The caseExactMatch matching rule is defined in [8]. 5.2.10 Serial number The serialNumber attribute is defined in [8]. 5.3 Attribute types for use in PKCS #7 data 5.3.1 Content type The contentType attribute type specifies the content type of the ContentInfo value being signed in PKCS #7 (or S/MIME CMS) digitally signed data. In such data, the contentType attribute type is required if there are any PKCS #7 authenticated attributes. contentType ATTRIBUTE ::= { WITH SYNTAX ContentType EQUALITY MATCHING RULE objectIdentifierMatch SINGLE VALUE TRUE ID pkcs-9-at-contentType } ContentType ::= OBJECT IDENTIFIER As indicated, content-type attributes must have a single attribute value. For two content-type values to match, their octet string representation must be of equal length and corresponding octets identical. The objectIdentifierMatch matching rule is defined in [7]. Note - This attribute type is described in [3] as well. Nystrom & Kaliski Informational [Page 12]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.3.2 Message digest The messageDigest attribute type specifies the message digest of the contents octets of the DER-encoding of the content field of the ContentInfo value being signed in PKCS #7 digitally signed data, where the message digest is computed under the signer's message digest algorithm. The message-digest attribute type is required in these cases if there are any PKCS #7 authenticated attributes present. messageDigest ATTRIBUTE ::= { WITH SYNTAX MessageDigest EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-messageDigest } MessageDigest ::= OCTET STRING As indicated, a message-digest attribute must have a single attribute value. For two messageDigest values to match, their octet string representation must be of equal length and corresponding octets identical. The octetStringMatch matching rule is defined in [8]. Note - This attribute is described in [3] as well. 5.3.3 Signing time The signingTime attribute type is intended for PKCS #7 digitally signed data. It specifies the time at which the signer (purportedly) performed the signing process. signingTime ATTRIBUTE ::= { WITH SYNTAX SigningTime EQUALITY MATCHING RULE signingTimeMatch SINGLE VALUE TRUE ID pkcs-9-at-signingTime } SigningTime ::= Time -- imported from ISO/IEC 9594-8 A signing-time attribute must have a single attribute value. The signingTimeMatch matching rule (defined in Section 6.1) returns TRUE if an attribute value represents the same time as a presented value. Nystrom & Kaliski Informational [Page 13]
RFC 2985 Selected Object Classes and Attribute Types November 2000 Quoting from [3]: "Dates between 1 January 1950 and 31 December 2049 (inclusive) MUST be encoded as UTCTime. Any dates with year values before 1950 or after 2049 MUST be encoded as GeneralizedTime. [Further,] UTCTime values MUST be expressed in Greenwich Mean Time (Zulu) and MUST include seconds (i.e., times are YYMMDDHHMMSSZ), even where the number of seconds is zero. Midnight (GMT) must be represented as "YYMMDD000000Z". Century information is implicit, and the century shall be determined as follows: - Where YY is greater than or equal to 50, the year shall be interpreted as 19YY; and - Where YY is less than 50, the year shall be interpreted as 20YY. GeneralizedTime values shall be expressed in Greenwich Mean Time (Zulu) and must include seconds (i.e., times are YYYYMMDDHHMMSSZ), even where the number of seconds is zero. GeneralizedTime values must not include fractional seconds." Note 1 - The definition of SigningTime matches the definition of Time specified in [10]. Note 2 - No requirement is imposed concerning the correctness of the signing time, and acceptance of a purported signing time is a matter of a recipient's discretion. It is expected, however, that some signers, such as time-stamp servers, will be trusted implicitly. 5.3.4 Random nonce The randomNonce attribute type is intended for PKCS #7 digitally signed data. It may be used by a signer unable (or unwilling) to specify the time at which the signing process was performed. Used in a correct manner, it will make it possible for the signer to protect against certain attacks, i.e. replay attacks. randomNonce ATTRIBUTE ::= { WITH SYNTAX RandomNonce EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-randomNonce } RandomNonce ::= OCTET STRING (SIZE(4..MAX)) -- At least four bytes long A random nonce attribute must have a single attribute value. Nystrom & Kaliski Informational [Page 14]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.3.5 Sequence number The sequenceNumber attribute type is intended for PKCS #7 digitally signed data. A signer wishing to associate a sequence number to all signature operations (much like a physical checkbook) may use it as an alternative to the randomNonce attribute. Used in a correct manner, it will make it possible for the signer to protect against certain attacks, i.e. replay attacks. sequenceNumber ATTRIBUTE ::= { WITH SYNTAX SequenceNumber EQUALITY MATCHING RULE integerMatch SINGLE VALUE TRUE ID pkcs-9-at-sequenceNumber } SequenceNumber ::= INTEGER (1..MAX) A sequence number attribute must have a single attribute value. The integerMatch matching rule is defined in [8]. 5.3.6 Countersignature The counterSignature attribute type specifies one or more signatures on the content octets of the DER encoding of the encryptedDigest field of a SignerInfo value in PKCS #7 digitally signed data. Thus, the countersignature attribute type countersigns (signs in serial) another signature. The countersignature attribute must be an unauthenticated PKCS #7 attribute; it cannot be an authenticated attribute. counterSignature ATTRIBUTE ::= { WITH SYNTAX SignerInfo ID pkcs-9-at-counterSignature } Countersignature values have the same meaning as SignerInfo values for ordinary signatures (see Section 9 of [14] and Section 5.3 of [3]), except that: 1. The authenticatedAttributes field must contain a messageDigest attribute if it contains any other attributes, but need not contain a contentType attribute, as there is no content type for countersignatures; and Nystrom & Kaliski Informational [Page 15]
RFC 2985 Selected Object Classes and Attribute Types November 2000 2. The input to the message-digesting process is the content octets of the DER encoding of the signatureValue field of the SignerInfo value with which the attribute is associated. A countersignature attribute can have multiple attribute values. Note 1 - The fact that a countersignature is computed on a signature (encrypted digest) means that the countersigning process need not know the original content input to the signing process. This has advantages both in efficiency and in confidentiality. Note 2 - A countersignature, since it has type SignerInfo, can itself contain a countersignature attribute. Thus it is possible to construct arbitrarily long series of countersignatures. 5.4 Attribute types for use with PKCS #10 certificate requests 5.4.1 Challenge password The challengePassword attribute type specifies a password by which an entity may request certificate revocation. The interpretation of challenge passwords is intended to be specified by certificate issuers etc; no particular interpretation is required. challengePassword ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-challengePassword} EQUALITY MATCHING RULE caseExactMatch SINGLE VALUE TRUE ID pkcs-9-at-challengePassword } A challenge-password attribute must have a single attribute value. ChallengePassword attribute values generated in accordance with this version of this document SHOULD use the PrintableString encoding whenever possible. If internationalization issues make this impossible, the UTF8String alternative SHOULD be used. PKCS #9- attribute processing systems MUST be able to recognize and process all string types in DirectoryString values. Note - Version 1.1 of this document defined challengePassword as having the syntax CHOICE {PrintableString, T61String}, but did contain a note explaining that this might be changed to a CHOICE of different string types in the future See also Note 2 in section 5.2.3. Nystrom & Kaliski Informational [Page 16]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.4.2 Extension request The extensionRequest attribute type may be used to carry information about certificate extensions the requester wishes to be included in a certificate. extensionRequest ATTRIBUTE ::= { WITH SYNTAX ExtensionRequest SINGLE VALUE TRUE ID pkcs-9-at-extensionRequest } ExtensionRequest ::= Extensions The Extensions type is imported from [10]. 5.4.3 Extended-certificate attributes (deprecated) The extendedCertificateAttributes attribute type specified a set of attributes for a PKCS #6 [13] extended certificate in a PKCS #10 certification request (the value of the extended certificate- attributes attribute would become the extension in the requested PKCS #6 extended certificate). Since the status of PKCS #6 is historic after the introduction of X.509 v3 certificates [10], the use of this attribute is deprecated. extendedCertificateAttributes ATTRIBUTE ::= { WITH SYNTAX SET OF Attribute SINGLE VALUE TRUE ID pkcs-9-at-extendedCertificateAttributes } An extended certificate attributes attribute must have a single attribute value (that value is a set, which itself may contain multiple values, but there must be only one set). 5.5 Attributes for use in PKCS #12 "PFX" PDUs or PKCS #15 tokens 5.5.1 Friendly name The friendlyName attribute type specifies a user-friendly name of the object it belongs to. It is referenced in [17]. Nystrom & Kaliski Informational [Page 17]
RFC 2985 Selected Object Classes and Attribute Types November 2000 friendlyName ATTRIBUTE ::= { WITH SYNTAX BMPString (SIZE(1..pkcs-9-ub-friendlyName)) EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-friendlyName } As indicated, friendlyName attributes must have a single attribute value. 5.5.2 Local key identifier The localKeyId attribute type specifies an identifier for a particular key. It is only to be used locally in applications. This attribute is referenced in [17]. localKeyId ATTRIBUTE ::= { WITH SYNTAX OCTET STRING EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-localKeyId } As indicated, localKeyId attributes must have a single attribute value. For two localKeyId values to match, their octet string representation must be of equal length and corresponding octets identical. 5.6 Attributes defined in S/MIME S/MIME (c.f. [12]) defines some attributes and object identifiers in the PKCS #9 object identifier tree. For completeness, they are mentioned here. 5.6.1 Signing description The signingDescription attribute is intended to provide a short synopsis of a message that can be used to present a user with an additional confirmation step before committing to a cryptographic operation. In most cases, the replication of the "Subject:" line from the header of a message should be sufficient and is recommended. signingDescription ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-signingDescription} EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-signingDescription } Nystrom & Kaliski Informational [Page 18]
RFC 2985 Selected Object Classes and Attribute Types November 2000 5.6.2 S/MIME capabilities The syntax and semantics of the smimeCapabilities attribute is defined in [12]. It is included here for the sake of completeness. smimeCapabilities ATTRIBUTE ::= { WITH SYNTAX SMIMECapabilities SINGLE VALUE ID pkcs-9-at-smimeCapabilities } SMIMECapabilities ::= SEQUENCE OF SMIMECapability SMIMECapability ::= SEQUENCE { algorithm ALGORITHM.&id ({SMIMEv3Algorithms}), parameters ALGORITHM.&Type ({SMIMEv3Algorithms}{@algorithm}) } SMIMEv3Algorithms ALGORITHM ::= {... -- See RFC 2633 -- } 6. Matching rules This section defines matching rules used in the definition of attributes in this document. 6.1 Case ignore match The pkcs9CaseIgnoreMatch rule compares for equality a presented string with an attribute value of type PKCS9String, without regard to the case (upper or lower) of the strings (e.g. "Pkcs" and "PKCS" match). pkcs9CaseIgnoreMatch MATCHING-RULE ::= { SYNTAX PKCS9String {pkcs9-ub-match} ID id-mr-pkcs9CaseIgnoreMatch } The rule returns TRUE if the strings are the same length and corresponding characters are identical except possibly with regard to case. Where the strings being matched are of different ASN.1 syntax, the comparison proceeds as normal so long as the corresponding characters are in both character sets. Otherwise matching fails. Nystrom & Kaliski Informational [Page 19]
RFC 2985 Selected Object Classes and Attribute Types November 2000 6.2 Signing time match The signingTimeMatch rule compares for equality a presented value with an attribute value of type SigningTime. signingTimeMatch MATCHING-RULE ::= { SYNTAX SigningTime ID pkcs-9-mr-signingTimeMatch } The rule returns TRUE if the attribute value represents the same time as the presented value. If a time is specified with seconds (or fractional seconds) absent, the number of seconds (fractional seconds) is assumed to be zero. Where the strings being matched are of different ASN.1 syntax, the comparison proceeds as follows: a) Convert both values to DER-encoded values of type GeneralizedTime, coordinated universal time. If this is not possible the matching fails. b) Compare the strings for equality. The rule returns TRUE if and only if the strings are of the same length and corresponding octets are identical. 7. Security Considerations Attributes of directory entries are used to provide descriptive information about the real-world objects they represent, which can be people, organizations or devices. Most countries have privacy laws regarding the publication of information about people. The challengePassword attribute should not be stored un-encrypted in a directory. Users of directory-aware applications making use of attributes defined for use with the pkcsEntity object class should make sure that the class's attributes are adequately protected, since they may potentially be read by third parties. If a password-protected value is stored (PKCS #8, #12 or #15), the directory should authenticate the requester before delivering the value to prevent an off-line password-search attack. Note that this potentially raises non- repudiation issues since the directory itself can try a password search to recover a private value, if stored this way. Nystrom & Kaliski Informational [Page 20]
RFC 2985 Selected Object Classes and Attribute Types November 2000 8. Authors' Addresses Magnus Nystrom RSA Security Box 10704 S-121 29 Stockholm Sweden EMail: magnus@rsasecurity.com Burt Kaliski RSA Security 20 Crosby Drive Bedford, MA 01730 USA EMail: bkaliski@rsasecurity.com Nystrom & Kaliski Informational [Page 21]
RFC 2985 Selected Object Classes and Attribute Types November 2000 APPENDICES A. ASN.1 module This appendix includes all of the ASN.1 type and value definitions contained in this document in the form of the ASN.1 module PKCS-9. PKCS-9 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) modules(0) pkcs-9(1)} DEFINITIONS IMPLICIT TAGS ::= BEGIN -- EXPORTS All -- -- All types and values defined in this module is exported for use -- in other ASN.1 modules. IMPORTS informationFramework, authenticationFramework, selectedAttributeTypes, upperBounds , id-at FROM UsefulDefinitions {joint-iso-itu-t ds(5) module(1) usefulDefinitions(0) 3} ub-name FROM UpperBounds upperBounds OBJECT-CLASS, ATTRIBUTE, MATCHING-RULE, Attribute, top, objectIdentifierMatch FROM InformationFramework informationFramework ALGORITHM, Extensions, Time FROM AuthenticationFramework authenticationFramework DirectoryString, octetStringMatch, caseIgnoreMatch, caseExactMatch, generalizedTimeMatch, integerMatch, serialNumber FROM SelectedAttributeTypes selectedAttributeTypes ContentInfo, SignerInfo FROM CryptographicMessageSyntax {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-9(9) smime(16) modules(0) cms(1)} EncryptedPrivateKeyInfo FROM PKCS-8 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-8(8) modules(1) pkcs-8(1)} Nystrom & Kaliski Informational [Page 22]
RFC 2985 Selected Object Classes and Attribute Types November 2000 PFX FROM PKCS-12 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-12(12) modules(0) pkcs-12(1)} PKCS15Token FROM PKCS-15 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-15(15) modules(1) pkcs-15(1)}; -- Upper bounds pkcs-9-ub-pkcs9String INTEGER ::= 255 pkcs-9-ub-emailAddress INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-unstructuredName INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-unstructuredAddress INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-challengePassword INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-friendlyName INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-signingDescription INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-match INTEGER ::= pkcs-9-ub-pkcs9String pkcs-9-ub-pseudonym INTEGER ::= ub-name pkcs-9-ub-placeOfBirth INTEGER ::= ub-name -- Object Identifiers pkcs-9 OBJECT IDENTIFIER ::= {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) 9} -- Main arcs pkcs-9-mo OBJECT IDENTIFIER ::= {pkcs-9 0} -- Modules branch pkcs-9-oc OBJECT IDENTIFIER ::= {pkcs-9 24} -- Object class branch pkcs-9-at OBJECT IDENTIFIER ::= {pkcs-9 25} -- Attribute branch, for -- new attributes pkcs-9-sx OBJECT IDENTIFIER ::= {pkcs-9 26} -- For syntaxes (RFC 2252) pkcs-9-mr OBJECT IDENTIFIER ::= {pkcs-9 27} -- Matching rules -- Object classes pkcs-9-oc-pkcsEntity OBJECT IDENTIFIER ::= {pkcs-9-oc 1} pkcs-9-oc-naturalPerson OBJECT IDENTIFIER ::= {pkcs-9-oc 2} -- Attributes pkcs-9-at-emailAddress OBJECT IDENTIFIER ::= {pkcs-9 1} pkcs-9-at-unstructuredName OBJECT IDENTIFIER ::= {pkcs-9 2} pkcs-9-at-contentType OBJECT IDENTIFIER ::= {pkcs-9 3} pkcs-9-at-messageDigest OBJECT IDENTIFIER ::= {pkcs-9 4} pkcs-9-at-signingTime OBJECT IDENTIFIER ::= {pkcs-9 5} pkcs-9-at-counterSignature OBJECT IDENTIFIER ::= {pkcs-9 6} pkcs-9-at-challengePassword OBJECT IDENTIFIER ::= {pkcs-9 7} pkcs-9-at-unstructuredAddress OBJECT IDENTIFIER ::= {pkcs-9 8} Nystrom & Kaliski Informational [Page 23]
RFC 2985 Selected Object Classes and Attribute Types November 2000 pkcs-9-at-extendedCertificateAttributes OBJECT IDENTIFIER ::= {pkcs-9 9} -- Obsolete (?) attribute identifiers, purportedly from "tentative -- PKCS #9 draft" -- pkcs-9-at-issuerAndSerialNumber OBJECT IDENTIFIER ::= {pkcs-9 10} -- pkcs-9-at-passwordCheck OBJECT IDENTIFIER ::= {pkcs-9 11} -- pkcs-9-at-publicKey OBJECT IDENTIFIER ::= {pkcs-9 12} pkcs-9-at-signingDescription OBJECT IDENTIFIER ::= {pkcs-9 13} pkcs-9-at-extensionRequest OBJECT IDENTIFIER ::= {pkcs-9 14} pkcs-9-at-smimeCapabilities OBJECT IDENTIFIER ::= {pkcs-9 15} -- Unused (?) -- pkcs-9-at-? OBJECT IDENTIFIER ::= {pkcs-9 17} -- pkcs-9-at-? OBJECT IDENTIFIER ::= {pkcs-9 18} -- pkcs-9-at-? OBJECT IDENTIFIER ::= {pkcs-9 19} pkcs-9-at-friendlyName OBJECT IDENTIFIER ::= {pkcs-9 20} pkcs-9-at-localKeyId OBJECT IDENTIFIER ::= {pkcs-9 21} pkcs-9-at-userPKCS12 OBJECT IDENTIFIER ::= {2 16 840 1 113730 3 1 216} pkcs-9-at-pkcs15Token OBJECT IDENTIFIER ::= {pkcs-9-at 1} pkcs-9-at-encryptedPrivateKeyInfo OBJECT IDENTIFIER ::= {pkcs-9-at 2} pkcs-9-at-randomNonce OBJECT IDENTIFIER ::= {pkcs-9-at 3} pkcs-9-at-sequenceNumber OBJECT IDENTIFIER ::= {pkcs-9-at 4} pkcs-9-at-pkcs7PDU OBJECT IDENTIFIER ::= {pkcs-9-at 5} -- IETF PKIX Attribute branch ietf-at OBJECT IDENTIFIER ::= {1 3 6 1 5 5 7 9} pkcs-9-at-dateOfBirth OBJECT IDENTIFIER ::= {ietf-at 1} pkcs-9-at-placeOfBirth OBJECT IDENTIFIER ::= {ietf-at 2} pkcs-9-at-gender OBJECT IDENTIFIER ::= {ietf-at 3} pkcs-9-at-countryOfCitizenship OBJECT IDENTIFIER ::= {ietf-at 4} pkcs-9-at-countryOfResidence OBJECT IDENTIFIER ::= {ietf-at 5} -- Syntaxes (for use with LDAP accessible directories) pkcs-9-sx-pkcs9String OBJECT IDENTIFIER ::= {pkcs-9-sx 1} pkcs-9-sx-signingTime OBJECT IDENTIFIER ::= {pkcs-9-sx 2} -- Matching rules pkcs-9-mr-caseIgnoreMatch OBJECT IDENTIFIER ::= {pkcs-9-mr 1} pkcs-9-mr-signingTimeMatch OBJECT IDENTIFIER ::= {pkcs-9-mr 2} Nystrom & Kaliski Informational [Page 24]
RFC 2985 Selected Object Classes and Attribute Types November 2000 -- Arcs with attributes defined elsewhere smime OBJECT IDENTIFIER ::= {pkcs-9 16} -- Main arc for S/MIME (RFC 2633) certTypes OBJECT IDENTIFIER ::= {pkcs-9 22} -- Main arc for certificate types defined in PKCS #12 crlTypes OBJECT IDENTIFIER ::= {pkcs-9 23} -- Main arc for crl types defined in PKCS #12 -- Other object identifiers id-at-pseudonym OBJECT IDENTIFIER ::= {id-at 65} -- Useful types PKCS9String {INTEGER : maxSize} ::= CHOICE { ia5String IA5String (SIZE(1..maxSize)), directoryString DirectoryString {maxSize} } -- Object classes pkcsEntity OBJECT-CLASS ::= { SUBCLASS OF { top } KIND auxiliary MAY CONTAIN { PKCSEntityAttributeSet } ID pkcs-9-oc-pkcsEntity } naturalPerson OBJECT-CLASS ::= { SUBCLASS OF { top } KIND auxiliary MAY CONTAIN { NaturalPersonAttributeSet } ID pkcs-9-oc-naturalPerson } -- Attribute sets PKCSEntityAttributeSet ATTRIBUTE ::= { pKCS7PDU | userPKCS12 | pKCS15Token | encryptedPrivateKeyInfo, ... -- For future extensions } Nystrom & Kaliski Informational [Page 25]
RFC 2985 Selected Object Classes and Attribute Types November 2000 NaturalPersonAttributeSet ATTRIBUTE ::= { emailAddress | unstructuredName | unstructuredAddress | dateOfBirth | placeOfBirth | gender | countryOfCitizenship | countryOfResidence | pseudonym | serialNumber, ... -- For future extensions } -- Attributes pKCS7PDU ATTRIBUTE ::= { WITH SYNTAX ContentInfo ID pkcs-9-at-pkcs7PDU } userPKCS12 ATTRIBUTE ::= { WITH SYNTAX PFX ID pkcs-9-at-userPKCS12 } pKCS15Token ATTRIBUTE ::= { WITH SYNTAX PKCS15Token ID pkcs-9-at-pkcs15Token } encryptedPrivateKeyInfo ATTRIBUTE ::= { WITH SYNTAX EncryptedPrivateKeyInfo ID pkcs-9-at-encryptedPrivateKeyInfo } emailAddress ATTRIBUTE ::= { WITH SYNTAX IA5String (SIZE(1..pkcs-9-ub-emailAddress)) EQUALITY MATCHING RULE pkcs9CaseIgnoreMatch ID pkcs-9-at-emailAddress } unstructuredName ATTRIBUTE ::= { WITH SYNTAX PKCS9String {pkcs-9-ub-unstructuredName} EQUALITY MATCHING RULE pkcs9CaseIgnoreMatch ID pkcs-9-at-unstructuredName } Nystrom & Kaliski Informational [Page 26]
RFC 2985 Selected Object Classes and Attribute Types November 2000 unstructuredAddress ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-unstructuredAddress} EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-unstructuredAddress } dateOfBirth ATTRIBUTE ::= { WITH SYNTAX GeneralizedTime EQUALITY MATCHING RULE generalizedTimeMatch SINGLE VALUE TRUE ID pkcs-9-at-dateOfBirth } placeOfBirth ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-placeOfBirth} EQUALITY MATCHING RULE caseExactMatch SINGLE VALUE TRUE ID pkcs-9-at-placeOfBirth } gender ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(1) ^ FROM ("M" | "F" | "m" | "f")) EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-gender } countryOfCitizenship ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(2))(CONSTRAINED BY { -- Must be a two-letter country acronym in accordance with -- ISO/IEC 3166 --}) EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-countryOfCitizenship } countryOfResidence ATTRIBUTE ::= { WITH SYNTAX PrintableString (SIZE(2))(CONSTRAINED BY { -- Must be a two-letter country acronym in accordance with -- ISO/IEC 3166 --}) EQUALITY MATCHING RULE caseIgnoreMatch ID pkcs-9-at-countryOfResidence } Nystrom & Kaliski Informational [Page 27]
RFC 2985 Selected Object Classes and Attribute Types November 2000 pseudonym ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-pseudonym} EQUALITY MATCHING RULE caseExactMatch ID id-at-pseudonym } contentType ATTRIBUTE ::= { WITH SYNTAX ContentType EQUALITY MATCHING RULE objectIdentifierMatch SINGLE VALUE TRUE ID pkcs-9-at-contentType } ContentType ::= OBJECT IDENTIFIER messageDigest ATTRIBUTE ::= { WITH SYNTAX MessageDigest EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-messageDigest } MessageDigest ::= OCTET STRING signingTime ATTRIBUTE ::= { WITH SYNTAX SigningTime EQUALITY MATCHING RULE signingTimeMatch SINGLE VALUE TRUE ID pkcs-9-at-signingTime } SigningTime ::= Time -- imported from ISO/IEC 9594-8 randomNonce ATTRIBUTE ::= { WITH SYNTAX RandomNonce EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-randomNonce } RandomNonce ::= OCTET STRING (SIZE(4..MAX)) -- At least four bytes long Nystrom & Kaliski Informational [Page 28]
RFC 2985 Selected Object Classes and Attribute Types November 2000 sequenceNumber ATTRIBUTE ::= { WITH SYNTAX SequenceNumber EQUALITY MATCHING RULE integerMatch SINGLE VALUE TRUE ID pkcs-9-at-sequenceNumber } SequenceNumber ::= INTEGER (1..MAX) counterSignature ATTRIBUTE ::= { WITH SYNTAX SignerInfo ID pkcs-9-at-counterSignature } challengePassword ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-challengePassword} EQUALITY MATCHING RULE caseExactMatch SINGLE VALUE TRUE ID pkcs-9-at-challengePassword } extensionRequest ATTRIBUTE ::= { WITH SYNTAX ExtensionRequest SINGLE VALUE TRUE ID pkcs-9-at-extensionRequest } ExtensionRequest ::= Extensions extendedCertificateAttributes ATTRIBUTE ::= { WITH SYNTAX SET OF Attribute SINGLE VALUE TRUE ID pkcs-9-at-extendedCertificateAttributes } friendlyName ATTRIBUTE ::= { WITH SYNTAX BMPString (SIZE(1..pkcs-9-ub-friendlyName)) EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-friendlyName } localKeyId ATTRIBUTE ::= { WITH SYNTAX OCTET STRING EQUALITY MATCHING RULE octetStringMatch SINGLE VALUE TRUE ID pkcs-9-at-localKeyId } Nystrom & Kaliski Informational [Page 29]
RFC 2985 Selected Object Classes and Attribute Types November 2000 signingDescription ATTRIBUTE ::= { WITH SYNTAX DirectoryString {pkcs-9-ub-signingDescription} EQUALITY MATCHING RULE caseIgnoreMatch SINGLE VALUE TRUE ID pkcs-9-at-signingDescription } smimeCapabilities ATTRIBUTE ::= { WITH SYNTAX SMIMECapabilities SINGLE VALUE TRUE ID pkcs-9-at-smimeCapabilities } SMIMECapabilities ::= SEQUENCE OF SMIMECapability SMIMECapability ::= SEQUENCE { algorithm ALGORITHM.&id ({SMIMEv3Algorithms}), parameters ALGORITHM.&Type ({SMIMEv3Algorithms}{@algorithm}) } SMIMEv3Algorithms ALGORITHM ::= {...-- See RFC 2633 --} -- Matching rules pkcs9CaseIgnoreMatch MATCHING-RULE ::= { SYNTAX PKCS9String {pkcs-9-ub-match} ID pkcs-9-mr-caseIgnoreMatch } signingTimeMatch MATCHING-RULE ::= { SYNTAX SigningTime ID pkcs-9-mr-signingTimeMatch } END B. BNF schema summary This appendix provides augmented BNF [2] definitions of the object class and most attribute types specified in this document along with their associated syntaxes and matching rules. The ABNF definitions have been done in accordance with [21], in an attempt to ease integration with LDAP-accessible Directory systems. Lines have been folded in some cases to improve readability. B.1 Syntaxes This section defines all syntaxes that are used in this document. Nystrom & Kaliski Informational [Page 30]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.1.1 PKCS9String ( 1.2.840.113549.1.9.26.1 DESC 'PKCS9String' ) The encoding of a value in this syntax is the string value itself. B.1.2 SigningTime ( 1.2.840.113549.1.9.26.2 DESC 'SigningTime' ) Values in this syntax are encoded as printable strings, represented as specified in [5]. Note that the time zone must be specified. For example, "199412161032Z". B.2 Object classes B.2.1 pkcsEntity ( 1.2.840.113549.1.9.24.1 NAME 'pkcsEntity' SUP top AUXILIARY MAY ( pKCS7PDU $ userPKCS12 $ pKCS15Token $ encryptedPrivateKeyInfo ) ) B.2.2 naturalPerson ( 1.2.840.113549.1.9.24.2 NAME 'naturalPerson' SUP top AUXILIARY MAY ( emailAddress $ unstructuredName $ unstructuredAddress $ dateOfBirth & placeOfBirth & gender & countryOfCitizenship & countryOfResidence & pseudonym & serialNumber ) ) Nystrom & Kaliski Informational [Page 31]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.3 Attribute types B.3.1 pKCS7PDU This attribute is to be stored and requested in binary form, as pKCS7PDU;binary. The attribute values are BER- or DER-encoded ContentInfo values. ( 1.2.840.113549.1.9.25.5 NAME 'pKCS7PDU' DESC 'PKCS #7 ContentInfo PDU' SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 ) B.3.2 userPKCS12 This attribute is to be stored and requested in binary form, as userPKCS12;binary. The attribute values are PFX PDUs stored as binary (BER- or DER-encoded) data. ( 2.16.840.1.113730.3.1.216 NAME 'userPKCS12' DESC 'PKCS #12 PFX PDU for exchange of personal information' SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 ) B.3.3 pKCS15Token This attribute is to be stored and requested in binary form, as pKCS15Token;binary. The attribute values are PKCS15Token PDUs stored as binary (BER- or DER-encoded) data. ( 1.2.840.113549.1.9.25.1 NAME 'pKCS15Token' DESC 'PKCS #15 token PDU' SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 ) B.3.4 encryptedPrivateKeyInfo This attribute is to be stored and requested in binary form, as encryptedPrivateKeyInfo;binary. The attribute values are EncryptedPrivateKeyInfo PDUs stored as binary (BER- or DER-encoded) data. Nystrom & Kaliski Informational [Page 32]
RFC 2985 Selected Object Classes and Attribute Types November 2000 ( 1.2.840.113549.1.9.25.2 NAME 'encryptedPrivateKeyInfo' DESC 'PKCS #8 encrypted private key info' SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 ) B.3.5 emailAddress ( 1.2.840.113549.1.9.1 NAME 'emailAddress' DESC 'Email address' EQUALITY pkcs9CaseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.26 ) B.3.6 unstructuredName ( 1.2.840.113549.1.9.2 NAME 'unstructuredName' DESC 'PKCS #9 unstructured name' EQUALITY pkcs9CaseIgnoreMatch SYNTAX 1.2.840.113549.1.9.26.1 ) B.3.7 unstructuredAddress ( 1.2.840.113549.1.9.8 NAME 'unstructuredAddress' DESC 'PKCS #9 unstructured address' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 ) B.3.8 dateOfBirth ( 1.3.6.1.5.5.7.9.1 NAME 'dateOfBirth' DESC 'Date of birth' EQUALITY generalizedTimeMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 SINGLE-VALUE ) Nystrom & Kaliski Informational [Page 33]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.3.9 placeOfBirth ( 1.3.6.1.5.5.7.9.2 NAME 'placeOfBirth' DESC 'Place of birth' EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 SINGLE-VALUE ) B.3.10 gender ( 1.3.6.1.5.5.7.9.3 NAME 'gender' DESC 'Gender' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.44 SINGLE-VALUE ) B.3.11 countryOfCitizenship ( 1.3.6.1.5.5.7.9.4 NAME 'countryOfCitizenship' DESC 'Country of citizenship' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.44 ) B.3.12 countryOfResidence ( 1.3.6.1.5.5.7.9.5 NAME 'countryOfResidence' DESC 'Country of residence' EQUALITY caseIgnoreMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.44 ) Nystrom & Kaliski Informational [Page 34]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.3.13 pseudonym ( 2.5.4.65 NAME 'pseudonym' DESC 'Pseudonym' EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 ) B.3.14 contentType In the (highly unlikely) event of this attribute being stored in a Directory it is to be stored and requested in binary form, as contentType;binary. Attribute values shall be OCTET STRINGs stored as binary (BER- or DER-encoded) data. ( 1.2.840.113549.1.9.3 NAME 'contentType' DESC 'PKCS #7 content type attribute' EQUALITY objectIdentifierMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.38 SINGLE-VALUE ) B.3.15 messageDigest In the (highly unlikely) event of this attribute being stored in a Directory it is to be stored and requested in binary form, as messageDigest;binary. Attribute values shall be OCTET STRINGs stored as binary (BER- or DER-encoded) data. ( 1.2.840.113549.1.9.4 NAME 'messageDigest' DESC 'PKCS #7 mesage digest attribute' EQUALITY octetStringMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 SINGLE-VALUE ) Nystrom & Kaliski Informational [Page 35]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.3.16 signingTime ( 1.2.840.113549.1.9.5 NAME 'signingTime' DESC 'PKCS #7 signing time' EQUALITY signingTimeMatch SYNTAX 1.2.840.113549.1.9.26.2 SINGLE-VALUE ) B.3.17 counterSignature In the (highly unlikely) event that this attribute is to be stored in a directory, it is to be stored and requested in binary form, as counterSignature;binary. Attribute values shall be stored as binary (BER- or DER-encoded) data. ( 1.2.840.113549.1.9.6 NAME 'counterSignature' DESC 'PKCS #7 countersignature' SYNTAX 1.3.6.1.4.1.1466.115.121.1.5 ) B.3.18 challengePassword ( 1.2.840.113549.1.9.7 NAME 'challengePassword' DESC 'Challenge password for certificate revocations' EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15 SINGLE-VALUE ) Note - It is not recommended to store unprotected values of this attribute in a directory. B.4 Matching rules B.4.1 pkcs9CaseIgnoreMatch ( 1.2.840.113549.1.9.27.1 NAME 'pkcs9CaseIgnoreMatch' SYNTAX 1.2.840.113549.1.9.26.1 ) Nystrom & Kaliski Informational [Page 36]
RFC 2985 Selected Object Classes and Attribute Types November 2000 B.4.2 signingTimeMatch ( 1.2.840.113549.1.9.27.3 NAME 'signingTimeMatch' SYNTAX 1.2.840.113549.1.9.26.2 ) C. Intellectual property considerations RSA Security makes no patent claims on the general constructions described in this document, although specific underlying techniques may be covered. License to copy this document is granted provided that it is identified as "RSA Security Inc. Public-Key Cryptography Standards (PKCS)" in all material mentioning or referencing this document. RSA Security makes no representations regarding intellectual property claims by other parties. Such determination is the responsibility of the user. D. Revision history Version 1.0 Version 1.0 was part of the June 3, 1991 initial public release of PKCS. Version 1.0 was also published as NIST/OSI Implementors' Workshop document SEC-SIG-91-24. Version 1.1 Version 1.1 incorporated several editorial changes, including updates to the references and the addition of a revision history. The following substantive changes were made: - Section 6: challengePassword, unstructuredAddress, and extendedCertificateAttributes attribute types were added - Section 7: challengePassword, unstructuredAddress, and extendedCertificateAttributes object identifiers were added Nystrom & Kaliski Informational [Page 37]
RFC 2985 Selected Object Classes and Attribute Types November 2000 Version 2.0 Version 2.0 incorporates several editorial changes as well. In addition, the following substantive changes have been made: - Addition of a Section defining two new auxiliary object classes, pkcsEntity and naturalPerson - Addition of several new attribute types and matching rules for use in conjunction with these object classes and elsewhere - Update of all ASN.1 to be in line with the 1997 version of this syntax - Addition a "compilable" ASN.1 module - Addition, in accordance with [21], an ABNF description of all attributes and object classes - Addition of an intellectual property considerations section Nystrom & Kaliski Informational [Page 38]
RFC 2985 Selected Object Classes and Attribute Types November 2000 E. References [1] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [2] Crocker, D. and P. Overell, "Augmented BNF for Syntax Specifications: ABNF", RFC 2234, November 1997. [3] Housley, R., "Cryptographic Message Syntax CMS", RFC 2630, June 1999. [4] ISO/IEC 3166-1:Codes for the representation of names of countries and their subdivisions - Part 1: Country codes. 1997. [5] ISO/IEC 8824-1:1999: Information technology - Abstract Syntax Notation One (ASN.1) - Specification of basic notation.1999. [6] ISO/IEC 8825-1:1999: Information technology - ASN.1 Encoding Rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER). 1999. [7] ISO/IEC 9594-2:1997: Information technology - Open Systems Interconnection - The Directory: Models. 1997. [8] ISO/IEC 9594-6:1997: Information technology - Open Systems Interconnection - The Directory: Selected attribute types. 1997. [9] ISO/IEC 9594-7:1997: Information technology - Open Systems Interconnection - The Directory: Selected object classes. 1997. [10] ISO/IEC 9594-8:1997: Information technology - Open Systems Interconnection - The Directory: Authentication framework. 1997. [11] ISO/IEC 10646-1: Information Technology - Universal Multiple- Octet Coded Character Set (UCS) - Part 1: Architecture and Basic Multilingual Plane. 1993. [12] Ramsdell, R., "S/MIME Version 3 Message Specification", RFC 2633, June 1999. [13] RSA Laboratories. PKCS #6: Extended-Certificate Syntax Standard. Version 1.5, November 1993. [14] RSA Laboratories. PKCS #7: Cryptographic Message Syntax Standard. Version 1.5, November 1993. Nystrom & Kaliski Informational [Page 39]
RFC 2985 Selected Object Classes and Attribute Types November 2000 [15] RSA Laboratories. PKCS #8: Private-Key Information Syntax Standard. Version 1.2, November 1993. [16] RSA Laboratories. PKCS #10: Certification Request Syntax Standard. Version 1.0, November 1993. [17] RSA Laboratories. PKCS #12: Personal Information Exchange Syntax Standard. Version 1.0, June 1999. [18] RSA Laboratories. PKCS #15: Cryptographic Token Information Format Standard. Version 1.1, June 2000. [19] Santesson, S., Polk, W., Barzin, P. and M. Nystrom, "Internet X.509 Public Key Infrastructure - Qualified Certificates Profile", Work in Progress. [20] Smith, M. "Definition of the inetOrgPerson LDAP Object Class", RFC 2798, April 2000. [21] Wahl, M., Coulbeck, A., Howes, T. and S. Kille, "Lightweight Directory Access Protocol (v3): Attribute Syntax Definitions", RFC 2252, December 1997. [22] Wahl, M., Howes, T. and S. Kille, "Lightweight Directory Access Protocol (v3)", RFC 2251, December 1997. Nystrom & Kaliski Informational [Page 40]
RFC 2985 Selected Object Classes and Attribute Types November 2000 F. Contact information & About PKCS The Public-Key Cryptography Standards are specifications produced by RSA Laboratories in cooperation with secure systems developers worldwide for the purpose of accelerating the deployment of public- key cryptography. First published in 1991 as a result of meetings with a small group of early adopters of public-key technology, the PKCS documents have become widely referenced and implemented. Contributions from the PKCS series have become part of many formal and de facto standards, including ANSI X9 documents, PKIX, SET, S/MIME, and SSL. Further development of PKCS occurs through mailing list discussions and occasional workshops, and suggestions for improvement are welcome. For more information, contact: PKCS Editor RSA Laboratories 20 Crosby Drive Bedford, MA 01730 USA pkcs-editor@rsasecurity.com http://www.rsasecurity.com/rsalabs/PKCS Nystrom & Kaliski Informational [Page 41]
RFC 2985 Selected Object Classes and Attribute Types November 2000 Full Copyright Statement Copyright (C) The Internet Society (2000). All Rights Reserved. This document and translations of it may be copied and furnished to others provided that the above copyright notice and this paragraph are included on all such copies. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Acknowledgement Funding for the RFC Editor function is currently provided by the Internet Society. Nystrom & Kaliski Informational [Page 42]

   

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