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Java SDK for Hyperledger Fabric. Deprecated as of Fabric v2.5, replaced by org.hyperledger.fabric:fabric-gateway.
package org.hyperledger.fabric.sdk.user;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.X509EncodedKeySpec;
import com.google.protobuf.InvalidProtocolBufferException;
import org.apache.milagro.amcl.FP256BN.BIG;
import org.hyperledger.fabric.protos.idemix.Idemix;
import org.hyperledger.fabric.protos.msp.MspConfig;
import org.hyperledger.fabric.sdk.User;
import org.hyperledger.fabric.sdk.exception.CryptoException;
import org.hyperledger.fabric.sdk.idemix.IdemixCredential;
import org.hyperledger.fabric.sdk.idemix.IdemixIssuerPublicKey;
import org.hyperledger.fabric.sdk.identity.IdemixEnrollment;
public class IdemixUserStore {
private static final String USER_PATH = "user";
private static final String VERIFIER_PATH = "msp";
private static final String IPK_CONFIG = "IssuerPublicKey";
private static final String REVOCATION_PUBLIC_KEY = "RevocationPublicKey";
protected final String storePath;
protected final String mspId;
protected final IdemixIssuerPublicKey ipk;
public IdemixUserStore(String storePath, String mspId) throws CryptoException {
this.storePath = storePath;
this.mspId = mspId;
Idemix.IssuerPublicKey ipkProto = readIdemixIssuerPublicKey(Paths.get(mspId, VERIFIER_PATH + IPK_CONFIG).toString());
this.ipk = new IdemixIssuerPublicKey(ipkProto);
if (!this.ipk.check()) {
throw new CryptoException("Failed verifying issuer public key.");
}
}
public User getUser(String id) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
MspConfig.IdemixMSPSignerConfig signerConfig = readIdemixMSPConfig(Paths.get(this.mspId, USER_PATH + id).toString());
PublicKey revocationPk = readIdemixRevocationPublicKey(this.mspId);
BIG sk = BIG.fromBytes(signerConfig.getSk().toByteArray());
IdemixCredential cred = new IdemixCredential(Idemix.Credential.parseFrom(signerConfig.getCred()));
Idemix.CredentialRevocationInformation cri = Idemix.CredentialRevocationInformation.parseFrom(signerConfig.getCredentialRevocationInformation());
IdemixEnrollment enrollment = new IdemixEnrollment(this.ipk, revocationPk, this.mspId, sk, cred, cri, signerConfig.getOrganizationalUnitIdentifier(), signerConfig.getRole());
return new IdemixUser(id, this.mspId, enrollment);
}
/**
* Helper function: parse Idemix MSP Signer config (is part of the MSPConfig proto) from path
*
* @param id
* @return IdemixMSPSignerConfig proto
*/
protected MspConfig.IdemixMSPSignerConfig readIdemixMSPConfig(String id) throws IOException {
Path path = Paths.get(this.storePath + id);
return MspConfig.IdemixMSPSignerConfig.parseFrom(Files.readAllBytes(path));
}
/**
* Parse Idemix issuer public key from the config file
*
* @param id
* @return Idemix IssuerPublicKey proto
*/
protected Idemix.IssuerPublicKey readIdemixIssuerPublicKey(String id) {
Path path = Paths.get(this.storePath + id);
byte[] data = null;
try {
data = Files.readAllBytes(path);
} catch (IOException e) {
e.printStackTrace();
}
Idemix.IssuerPublicKey ipk = null;
try {
ipk = Idemix.IssuerPublicKey.parseFrom(data);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
return ipk;
}
/**
* Parse Idemix long-term revocation public key
*
* @param id
* @return idemix long-term revocation public key
*/
protected PublicKey readIdemixRevocationPublicKey(String id) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException {
Path path = Paths.get(this.mspId, VERIFIER_PATH + id);
return KeyFactory.getInstance("EC").generatePublic(new X509EncodedKeySpec(Files.readAllBytes(path)));
}
}