GB/T 37376-2024Transportation - Digital certificate format (English PDF)

6.2.1 Basic elements

6.2.1.1 Encoding rules The data structure defined in this document shall comply with the requirements of GB/T 16262 (all parts). The various information in the digital certificate format shall be encoded using the COER encoding rules specified in ISO/IEC 8825-7.

6.2.1.2 Basic data types The basic data types are defined as follows: The following octet strings are used in the data structure definitions.

6.2.1.3 Application identifier Definition type. Aid 6.2.1.4 3-byte (OCTET) hash value Definition type. HashedId3 6.2.1.5 8-byte (OCTET) hash value Definition type. HashedId

8 Structure. HashedId8..= OCTET STRING (SIZE(8)) SequenceOfHashedId8..= SEQUENCE OF HashedId

8 Description. This data structure contains an 8-byte truncated hash value of another data structure. The HashedId8 of a given data structure is obtained by computing the hash value of the encoded data structure and taking the low-order 8 octets of the hash output. The low-order 8 bytes are the last 8 octets of the hash value, when represented in network byte order. 6.2.1.6 10-byte (OCTET) hash value Type definition. HashedId

10 Structure. HashedId10..= OCTET STRING (SIZE(10)) SequenceOfHashedId10..= SEQUENCE OF HashedId

10 Description. This data structure contains a 10-byte truncated hash value of another data structure. HashedId10 of a given data structure is obtained by computing the hash value of the encoded data structure and taking the low-order 10 octets of the hash output. The low-order 10 bytes are the last 10 octets of the hash value, when represented in network byte order.

6.2.1.7 Hash algorithm Type definition. HashAlgorithm Structure. Description. This data structure represents a hash algorithm. 6.2.1.8 32-bit time Definition type. Time

32 Structure. Time32..= Uint

32 Description. Time32 is a 32-bit unsigned integer, with high-order first encoding format, giving the number of seconds of the International Atomic Time since

08.00.00 Beijing time on January 1, 2004. 6.2.1.9 64-bit time Definition type. Time

64 Structure. Time64..= Uint

64 Description. Time64 is a 64-bit unsigned integer, with high-order first encoding format, giving the number of microseconds of the International Atomic Time since

08.00.00 Beijing time on January 1, 2004.

6.2.2 Certificate

6.2.2.30 Verification key indicator Definition type. VerificationKeyIndicator Structure.

6.3 ITS certificate revocation list

6.3.1 ITS CRL encapsulation format Definition type. SecuredCrl Structure. Description. ITS CRL is defined as a secure encapsulation message, whose content field type is signed data. The signature data payload structure in the signed CRL has no range data extDataHash field; the data field contains ITSSecData, whose content field type is UnsecuredData data and contains signature content. ITSSecData and other ITS CRL security encapsulation related data structures shall comply with the requirements of Appendix C.

6.3.2 ITS CRL content Definition type. CrlContents Structure.

6.3.3 Priority information Definition Type. CrlPriorityInfo Structure.

6.3.6 Revocation certificate link value information Definition type. ToBeSignedLinkageValueCrl Structure.

6.3.7 Revocation batch information Definition type. JMaxGroup Structure. Description. This data structure contains the following information. - jMax is used for the link value-based revocation algorithm. This value applies to all revocation information contained in contents; - contents contains individual link data.

6.3.8 Linkage authority information Definition type. LAGroup Structure.

6.3.9 Total revocation information Definition type. IMaxGroup Structure.

6.3.10 Individual linkage data Definition type. IndividualRevocation Structure. Description. This data structure contains the following information. - linkageSeed1 is used as the LinkageSeed 1 parameter for the revocation algorithm based on the double seed link value; - linkageSeed2 is used as the LinkageSeed 2 parameter for the revocation algorithm based on the double seed link value.

6.3.11 Dual link authority CRL information Definition type. GroupCrlEntry Structure.

6.3.12 Single link authority CRL information Definition type. GroupSingleSeedCrlEntry Structure. Description. This data structure contains the following information.