org.bouncycastle.asn1.gm

Class SM9Signature

java.lang.Object

org.bouncycastle.asn1.ASN1Object

org.bouncycastle.asn1.gm.SM9Signature

All Implemented Interfaces:

ASN1Encodable, Encodable

public class SM9Signature
extends ASN1Object

The SM9 signature data structure of GM/T 0080-2020 (the (h, S) values are defined by the signature algorithm in GM/T 0044.2).

 SM9Signature ::= SEQUENCE {
     h  OCTET STRING,   -- the integer h, 32 bytes big-endian
     S  BIT STRING      -- the point S of G1, uncompressed (0x04 || x || y)
 }
 

The h OCTET STRING / S BIT STRING encoding has been cross-checked against the GmSSL and gmsm (emmansun) reference implementations of GM/T 0080-2020. This is the structure the JCA SM9 signature produces and consumes; the lightweight SM9Signer works with the raw h || S components, which this type wraps.

Both components have a fixed size, h 32 bytes and S 65, and both constructors hold them to it.

Constructor Summary

Constructors

Constructor and Description
SM9Signature(byte[] h, byte[] s)

Method Summary

Modifier and Type	Method and Description
byte[]	getH()
static SM9Signature	getInstance(java.lang.Object o)
byte[]	getS()
ASN1Primitive	toASN1Primitive() Method providing a primitive representation of this object suitable for encoding.

Methods inherited from class org.bouncycastle.asn1.ASN1Object

encodeTo, encodeTo, equals, getEncoded, getEncoded, hasEncodedTagValue, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SM9Signature

public SM9Signature(byte[] h,
                    byte[] s)

Method Detail

getInstance

public static SM9Signature getInstance(java.lang.Object o)

getH

public byte[] getH()

getS

public byte[] getS()

toASN1Primitive

public ASN1Primitive toASN1Primitive()

Description copied from class: ASN1Object

Method providing a primitive representation of this object suitable for encoding.

Specified by:

toASN1Primitive in interface ASN1Encodable

Specified by:

toASN1Primitive in class ASN1Object

Returns:

a primitive representation of this object.