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SM2 cryptography message syntax specification
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Similar standards GM/T 0009 GM/T 0010-2023: SM2 cryptography message syntax specification---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GMT0010-2023
GM
CRYPTOGRAPHIC INDUSTRY STANDARD
ICS 35.030
CCS L 80
Replacing GM/T 0010-2012
SM2 Cryptography Message Syntax Specification
Issued on: DECEMBER 4, 2023
Implemented on: JUNE 1, 2024
Issued by. State Cryptography Administration
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Abbreviated Terms... 6
5 OID Definitions... 6
6 Definitions of Basic Types... 6
6.1 CertificateRevocationLists... 6
6.2 ContentEncryptionAlgorithmIdentifier... 6
6.3 DigestAlgorithmIdentifier... 7
6.4 DigestEncryptionAlgorithmIdentifier... 7
6.5 Certificate... 7
6.6 IssuerAndSerialNumber... 7
6.7 KeyEncryptionAlgorithmIdentifier... 7
6.8 Version... 7
6.9 ContentInfo... 8
7 Data (a Data Type)... 8
8 SignedData (a Signed Data Type)... 8
8.1 signData type... 8
8.2 signerInfo type... 9
9 EnvelopedData (a Digital Enveloped Data Type)... 10
9.1 envelopedData type... 10
9.2 recipientInfo type... 11
10 SignedAndEnvelopedData (a Signed and Enveloped Data Type)... 12
11 EncryptedData (an Encrypted Data Type)... 13
12 KeyAgreementInfo (a Key Agreement Type)... 14
Appendix A (Informative) Example... 15
Appendix B (Normative) SM2 Implicit Certificate Cryptographic Signature Message
Syntax... 27
Appendix C (Normative) SM2 Key Format... 32
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GM/T 0010-2012 SM2 Cryptography Message Syntax Specification.
Compared with GM/T 0010-2012, the major technical changes of this Document are as follows
besides the structural adjustments and editorial modifications.
a) Add normative references GB/T 25069, GM/T 0015 and GM/Z 4001 (see Clause 3, 6.5);
and delete the reference to PKCS# 6 (see 6.5 of the 2012 Edition);
b) Delete the terms "algorithm identifier" and "SM2 cryptographic algorithm" (see 3.1 and
3.2 of the 2012 Edition); and add the term "implicit certificate" (see 3.1 of this Edition);
c) Add 3 OIDs related to implicit certificates (see Clause 5 of this Edition);
d) Delete the description of extended certificate types (see 6.5 of the 2012 Edition);
e) Change "contentInfo SM2Signature" (see Clause 8 of this Edition; Clause 8 of the 2012
Edition);
f) Change userCertificate (see Clause 12 of this Edition; Clause 12 of the 2012 Edition);
Chapter);
g) Add normative Appendix B (see Appendix B of this Edition).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall not assume the responsibility to identify these patents.
This Document was proposed by and under the jurisdiction of Cryptography Standardization
Technical Committee.
Drafting organizations of this Document. Koal Software Co., Ltd.; Beijing Haitai Fangyuan
High Technology Co., Ltd.; Beijing Certificate Authority Co., Ltd.; Guangdong Electronic
Certification Authority Co., Ltd.; Wuxi Jiangnan Information Security Engineering Technology
Center; CETC Cyberspace Security Technology Co., Ltd.; Beijing Infosec Technologies Co.,
Ltd.; Beijing Guomai Xinan Technology Co., Ltd.; Shanghai Electronic Certificate Authority
Center Co., Ltd.; Xingtang Communication Technology Co., Ltd.; Shandong De'an Information
Technology Co., Ltd.; Shandong University; Shenzhen Aolian Information Security
Technology Co., Ltd.; SmartPunch (Shanghai) Testing Technology Co., Ltd.; Shanghai Yidong
Network Information Co., Ltd.; and National Research Center for Information Technology
Security.
Chief drafting staffs of this Document. Liu Ping, Zheng Qiang, Tang Wuzheng, Liu Zengshou,
Li Shusheng, Zhao Yongsheng, Zhao Min, Liang Ningning, Wang Zongbin, Yuan Feng, Kong
SM2 Cryptography Message Syntax Specification
1 Scope
This Document specifies the syntax of encrypted and signed messages using the SM2
cryptographic algorithm.
This Document is applicable to the standardized encapsulation of the results of encryption and
signing operations using the SM2 cryptographic algorithm.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 25069 Information security techniques - Terminology
GM/T 0006 Cryptographic application identifier criterion specification
GM/T 0009 SM2 cryptography algorithm application specification
GM/T 0015 Digital certificate format
GM/Z 4001 Cryptology terminology
3 Terms and Definitions
For the purposes of this Document, the terms and definitions given in GB/T 25069 and GM/Z
4001 apply.
3.1 Implicit certificate
A digital certificate that contains user identification, public key recovery data, and issuer
identification information but does not explicitly contain a digital signature from a certification
authority (CA).
NOTE. The actual public key associated with the user is calculated from the elliptic curve system
parameters, the CA's public key, and the associated user information and public key recovery data in the
implicit certificate.
4 Abbreviated Terms
The following abbreviated terms are applicable to this Document.
CA. certification authority
OID. object identity
5 OID Definitions
This Document defines the identifiers for 9 objects, such as data, signedData, envelopedData,
signedAndEnvelopedData, encryptedData, keyAgreementInfo, imcSignedData,
imcEnvelopedData, and imcSignedAndEnvelopedData; see Table 1 in detail.
6 Definitions of Basic Types
6.1 CertificateRevocationLists
The CertificateRevocationLists type identifies a set of certificate revocation lists.
CertificateRevocationLists ∷ = SET OF CertificateRevocationList
6.2 ContentEncryptionAlgorithmIdentifier
The ContentEncryptionAlgorithmIdentifier type identifies a data encryption algorithm. Its OID
shall comply with GM/T 0006.
ContentEncryptionAlgorithmIdentifier ∷ = AlgorithmIdentifier
6.3 DigestAlgorithmIdentifier
The DigestAlgorithmIdentifier type indicates a message digest algorithm. This Document is the
SM3 cryptographic algorithm; and its OID shall comply with GM/T 0006.
DigestAlgorithmIdentifier ∷ = AlgorithmIdentifier
6.4 DigestEncryptionAlgorithmIdentifier
The DigestEncryptionAlgorithmIdentifier type indicates a signature algorithm. This Document
is the SM2 signature algorithm; and its OID shall comply with GM/T 0006.
DigestEncryptionAlgorithmIdentifier ∷ = AlgorithmIdentifier
6.5 Certificate
The Certificate type specifies a certificate that conforms to the format in GM/T 0015.It
represents a set sufficient to contain the certificate chain from a recognized "root" or "top CA"
to all signers.
Certificates ∷ = SET OF Certificate
6.6 IssuerAndSerialNumber
The IssuerAndSerialNumber type specifies a certificate issuer's distinguished name and the
certificate serial number determined by the issuer, which can be used to identify a certificate
and the entity and public key corresponding to the certificate.
IssuerAndSerialNumber ∷ = SEQUENCE {
issuer Name,
serialNumber CertificateSerialNumber
6.7 KeyEncryptionAlgorithmIdentifier
The KeyEncryptionAlgorithmIdentifier type identifies the encryption algorithm used to
encrypt a symmetric key.
KeyEncryptionAlgorithmIdentifier ∷ = AlgorithmIdentifier
6.8 Version
The Version type indicates the syntax version number.
Version ∷ = INTEGER(1)
6.9 ContentInfo
The ContentInfo type indicates the general syntax structure of content exchange. The general
syntax structure of content exchange is defined as follows.
ContentInfo ∷ = SEQUENCE {
contentType ContentType,
content[0] EXPLICIT ANY DEFINED BY contentType OPTIONAL
ContentType ∷ = OBJECT IDENTIFIER
Thereof.
ContentType is an object identifier, as defined in Clause 5.
content is optional.
7 Data (a Data Type)
The Data structure of data type is defined as follows.
Data ∷ = OCTET STRING
The Data of data type represents an arbitrary byte string.
8 SignedData (a Signed Data Type)
8.1 signData type
The data type of signedData consists of data of any type and a signature value of at least one
signer. Data of any type can be signed by any number of signers at the same time. For an
example of the signature data type, see A.1 in Appendix A. The signed data type in an implicit
certificate shall comply with B.1 in Appendix B.
The data type structure of the signedData is defined as follows.
SignedData ∷ = SEQUENCE {
version Version,
digestAlgorithms DigestAlgorithmIdentifiers,
contentInfo ContentInfo,
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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