org.hyperledger.fabric.sdk.identity

Class IdemixSigningIdentity

java.lang.Object

org.hyperledger.fabric.sdk.identity.IdemixSigningIdentity

All Implemented Interfaces:

Identity, SigningIdentity

public class IdemixSigningIdentity
extends Object
implements SigningIdentity

IdemixSigningIdentity is an Idemix implementation of the SigningIdentity It contains IdemixIdentity (a public part) and a corresponding secret part that contains the user secret key and the commitment opening (randomness) to the pseudonym value (a commitment to the user secret)

We note that since the attributes and their disclosure is fixed we are not adding them as fields here.

Constructor Summary

Constructors

Constructor and Description
IdemixSigningIdentity(IdemixEnrollment enrollment)
IdemixSigningIdentity(IdemixIssuerPublicKey ipk, PublicKey revocationPk, String mspId, org.apache.milagro.amcl.FP256BN.BIG sk, IdemixCredential cred, org.hyperledger.fabric.protos.idemix.Idemix.CredentialRevocationInformation cri, String ou, int role) Create new Idemix Signing Identity with a fresh pseudonym

Method Summary

Modifier and Type	Method and Description
org.hyperledger.fabric.protos.msp.Identities.SerializedIdentity	createSerializedIdentity() Converts an identity to bytes
IdemixPseudonym	getNym()
IdemixSignature	getProof()
byte[]	sign(byte[] msg) Sings a message with the secret key and the corresponding certificate
boolean	verifySignature(byte[] msg, byte[] sig) Verifies a signature on a message

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IdemixSigningIdentity

public IdemixSigningIdentity(IdemixEnrollment enrollment)
                      throws CryptoException,
                             InvalidArgumentException

Throws:

CryptoException

InvalidArgumentException

IdemixSigningIdentity

public IdemixSigningIdentity(IdemixIssuerPublicKey ipk,
                             PublicKey revocationPk,
                             String mspId,
                             org.apache.milagro.amcl.FP256BN.BIG sk,
                             IdemixCredential cred,
                             org.hyperledger.fabric.protos.idemix.Idemix.CredentialRevocationInformation cri,
                             String ou,
                             int role)
                      throws CryptoException,
                             InvalidArgumentException

Create new Idemix Signing Identity with a fresh pseudonym

Parameters:

ipk - issuer public key

revocationPk - the issuer's long term revocation public key

mspId - MSP identifier

sk - user's secret

cred - idemix credential

cri - the credential revocation information

ou - is OU attribute

role - is role attribute

Throws:

CryptoException

InvalidArgumentException

Method Detail

sign

public byte[] sign(byte[] msg)
            throws CryptoException,
                   InvalidArgumentException

Description copied from interface: SigningIdentity

Sings a message with the secret key and the corresponding certificate

Specified by:

sign in interface SigningIdentity

Returns:

signature

Throws:

CryptoException

InvalidArgumentException

createSerializedIdentity

public org.hyperledger.fabric.protos.msp.Identities.SerializedIdentity createSerializedIdentity()

Description copied from interface: Identity

Converts an identity to bytes

Specified by:

createSerializedIdentity in interface Identity

Returns:

SerializedIdentity

verifySignature

public boolean verifySignature(byte[] msg,
                               byte[] sig)
                        throws CryptoException,
                               InvalidArgumentException

Description copied from interface: SigningIdentity

Verifies a signature on a message

Specified by:

verifySignature in interface SigningIdentity

Returns:

true/false

Throws:

CryptoException

InvalidArgumentException

getNym

public IdemixPseudonym getNym()

getProof

public IdemixSignature getProof()