Examples with RSAPublicKey com.github.zhenwei.core.asn1.pkcs.RSAPublicKey used on opensource projects

Example 1 with RSAPublicKey

use of com.github.zhenwei.core.asn1.pkcs.RSAPublicKey in project sshj by hierynomus.

the class RSAPrivateKeyInfoKeyPairConverter method getKeyPair.

/**
 * Get PEM Key Pair parsing RSA Public Key attributes from RSA Private Key Information
 *
 * @param privateKeyInfo RSA Private Key Information
 * @return PEM Key Pair
 * @throws IOException Thrown on Public Key parsing failures
 */
@Override
public PEMKeyPair getKeyPair(final PrivateKeyInfo privateKeyInfo) throws IOException {
    Objects.requireNonNull(privateKeyInfo, "Private Key Info required");
    final AlgorithmIdentifier algorithmIdentifier = privateKeyInfo.getPrivateKeyAlgorithm();
    final ASN1ObjectIdentifier algorithm = algorithmIdentifier.getAlgorithm();
    if (PKCSObjectIdentifiers.rsaEncryption.equals(algorithm)) {
        logger.debug("RSA Algorithm Found [{}]", algorithm);
    } else {
        throw new IllegalArgumentException(String.format("RSA Algorithm OID required [%s]", algorithm));
    }
    final RSAPublicKey rsaPublicKey = getRsaPublicKey(privateKeyInfo);
    final SubjectPublicKeyInfo subjectPublicKeyInfo = new SubjectPublicKeyInfo(algorithmIdentifier, rsaPublicKey);
    return new PEMKeyPair(subjectPublicKeyInfo, privateKeyInfo);
}

Example 2 with RSAPublicKey

use of com.github.zhenwei.core.asn1.pkcs.RSAPublicKey in project LinLong-Java by zhenwei1108.

the class RSAPublicKey method toASN1Primitive.

/**
 * This outputs the key in PKCS1v2 format.
 * <pre>
 *      RSAPublicKey ::= SEQUENCE {
 *                          modulus INTEGER, -- n
 *                          publicExponent INTEGER, -- e
 *                      }
 * </pre>
 * <p>
 */
public ASN1Primitive toASN1Primitive() {
    ASN1EncodableVector v = new ASN1EncodableVector(2);
    v.add(new ASN1Integer(getModulus()));
    v.add(new ASN1Integer(getPublicExponent()));
    return new DERSequence(v);
}

Example 3 with RSAPublicKey

use of com.github.zhenwei.core.asn1.pkcs.RSAPublicKey in project LinLong-Java by zhenwei1108.

the class PublicKeyDataObject method getInstance.

public static PublicKeyDataObject getInstance(Object obj) {
    if (obj instanceof PublicKeyDataObject) {
        return (PublicKeyDataObject) obj;
    }
    if (obj != null) {
        ASN1Sequence seq = ASN1Sequence.getInstance(obj);
        ASN1ObjectIdentifier usage = ASN1ObjectIdentifier.getInstance(seq.getObjectAt(0));
        if (usage.on(EACObjectIdentifiers.id_TA_ECDSA)) {
            return new ECDSAPublicKey(seq);
        } else {
            return new RSAPublicKey(seq);
        }
    }
    return null;
}

Example 4 with RSAPublicKey

use of com.github.zhenwei.core.asn1.pkcs.RSAPublicKey in project LinLong-Java by zhenwei1108.

the class RSAPublicKeyStructure method toASN1Primitive.

/**
 * This outputs the key in PKCS1v2 format.
 * <pre>
 *      RSAPublicKey ::= SEQUENCE {
 *                          modulus INTEGER, -- n
 *                          publicExponent INTEGER, -- e
 *                      }
 * </pre>
 * <p>
 */
public ASN1Primitive toASN1Primitive() {
    ASN1EncodableVector v = new ASN1EncodableVector(2);
    v.add(new ASN1Integer(getModulus()));
    v.add(new ASN1Integer(getPublicExponent()));
    return new DERSequence(v);
}

Example 5 with RSAPublicKey

use of com.github.zhenwei.core.asn1.pkcs.RSAPublicKey in project robovm by robovm.

the class PublicKeyFactory method createKey.

/**
     * Create a public key from the passed in SubjectPublicKeyInfo
     * 
     * @param keyInfo the SubjectPublicKeyInfo containing the key data
     * @return the appropriate key parameter
     * @throws IOException on an error decoding the key
     */
public static AsymmetricKeyParameter createKey(SubjectPublicKeyInfo keyInfo) throws IOException {
    AlgorithmIdentifier algId = keyInfo.getAlgorithm();
    if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.rsaEncryption) || algId.getAlgorithm().equals(X509ObjectIdentifiers.id_ea_rsa)) {
        RSAPublicKey pubKey = RSAPublicKey.getInstance(keyInfo.parsePublicKey());
        return new RSAKeyParameters(false, pubKey.getModulus(), pubKey.getPublicExponent());
    } else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.dhpublicnumber)) {
        DHPublicKey dhPublicKey = DHPublicKey.getInstance(keyInfo.parsePublicKey());
        BigInteger y = dhPublicKey.getY().getValue();
        DHDomainParameters dhParams = DHDomainParameters.getInstance(algId.getParameters());
        BigInteger p = dhParams.getP().getValue();
        BigInteger g = dhParams.getG().getValue();
        BigInteger q = dhParams.getQ().getValue();
        BigInteger j = null;
        if (dhParams.getJ() != null) {
            j = dhParams.getJ().getValue();
        }
        DHValidationParameters validation = null;
        DHValidationParms dhValidationParms = dhParams.getValidationParms();
        if (dhValidationParms != null) {
            byte[] seed = dhValidationParms.getSeed().getBytes();
            BigInteger pgenCounter = dhValidationParms.getPgenCounter().getValue();
            // TODO Check pgenCounter size?
            validation = new DHValidationParameters(seed, pgenCounter.intValue());
        }
        return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
    } else if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement)) {
        DHParameter params = DHParameter.getInstance(algId.getParameters());
        ASN1Integer derY = (ASN1Integer) keyInfo.parsePublicKey();
        BigInteger lVal = params.getL();
        int l = lVal == null ? 0 : lVal.intValue();
        DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
        return new DHPublicKeyParameters(derY.getValue(), dhParams);
    } else // END android-removed
    if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa) || algId.getAlgorithm().equals(OIWObjectIdentifiers.dsaWithSHA1)) {
        ASN1Integer derY = (ASN1Integer) keyInfo.parsePublicKey();
        ASN1Encodable de = algId.getParameters();
        DSAParameters parameters = null;
        if (de != null) {
            DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
            parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
        }
        return new DSAPublicKeyParameters(derY.getValue(), parameters);
    } else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey)) {
        X962Parameters params = new X962Parameters((ASN1Primitive) algId.getParameters());
        X9ECParameters x9;
        if (params.isNamedCurve()) {
            ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier) params.getParameters();
            x9 = X962NamedCurves.getByOID(oid);
            if (x9 == null) {
                x9 = SECNamedCurves.getByOID(oid);
                if (x9 == null) {
                    x9 = NISTNamedCurves.getByOID(oid);
                // BEGIN android-removed
                // if (x9 == null)
                // {
                //     x9 = TeleTrusTNamedCurves.getByOID(oid);
                // }
                // END android-removed
                }
            }
        } else {
            x9 = X9ECParameters.getInstance(params.getParameters());
        }
        ASN1OctetString key = new DEROctetString(keyInfo.getPublicKeyData().getBytes());
        X9ECPoint derQ = new X9ECPoint(x9.getCurve(), key);
        // TODO We lose any named parameters here
        ECDomainParameters dParams = new ECDomainParameters(x9.getCurve(), x9.getG(), x9.getN(), x9.getH(), x9.getSeed());
        return new ECPublicKeyParameters(derQ.getPoint(), dParams);
    } else {
        throw new RuntimeException("algorithm identifier in key not recognised");
    }
}