diff options
Diffstat (limited to 'prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/BCGOST3410PublicKey.java')
| -rw-r--r-- | prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/BCGOST3410PublicKey.java | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/BCGOST3410PublicKey.java b/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/BCGOST3410PublicKey.java new file mode 100644 index 00000000..658715c9 --- /dev/null +++ b/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/BCGOST3410PublicKey.java @@ -0,0 +1,224 @@ +package org.spongycastle.jcajce.provider.asymmetric.gost; + +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.math.BigInteger; + +import org.spongycastle.asn1.ASN1ObjectIdentifier; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.DEROctetString; +import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers; +import org.spongycastle.asn1.cryptopro.GOST3410PublicKeyAlgParameters; +import org.spongycastle.asn1.x509.AlgorithmIdentifier; +import org.spongycastle.asn1.x509.SubjectPublicKeyInfo; +import org.spongycastle.crypto.params.GOST3410PublicKeyParameters; +import org.spongycastle.jcajce.provider.asymmetric.util.KeyUtil; +import org.spongycastle.jce.interfaces.GOST3410Params; +import org.spongycastle.jce.interfaces.GOST3410PublicKey; +import org.spongycastle.jce.spec.GOST3410ParameterSpec; +import org.spongycastle.jce.spec.GOST3410PublicKeyParameterSetSpec; +import org.spongycastle.jce.spec.GOST3410PublicKeySpec; + +public class BCGOST3410PublicKey + implements GOST3410PublicKey +{ + static final long serialVersionUID = -6251023343619275990L; + + private BigInteger y; + private transient GOST3410Params gost3410Spec; + + BCGOST3410PublicKey( + GOST3410PublicKeySpec spec) + { + this.y = spec.getY(); + this.gost3410Spec = new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec(spec.getP(), spec.getQ(), spec.getA())); + } + + BCGOST3410PublicKey( + GOST3410PublicKey key) + { + this.y = key.getY(); + this.gost3410Spec = key.getParameters(); + } + + BCGOST3410PublicKey( + GOST3410PublicKeyParameters params, + GOST3410ParameterSpec spec) + { + this.y = params.getY(); + this.gost3410Spec = spec; + } + + BCGOST3410PublicKey( + BigInteger y, + GOST3410ParameterSpec gost3410Spec) + { + this.y = y; + this.gost3410Spec = gost3410Spec; + } + + BCGOST3410PublicKey( + SubjectPublicKeyInfo info) + { + GOST3410PublicKeyAlgParameters params = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters()); + DEROctetString derY; + + try + { + derY = (DEROctetString)info.parsePublicKey(); + + byte[] keyEnc = derY.getOctets(); + byte[] keyBytes = new byte[keyEnc.length]; + + for (int i = 0; i != keyEnc.length; i++) + { + keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // was little endian + } + + this.y = new BigInteger(1, keyBytes); + } + catch (IOException e) + { + throw new IllegalArgumentException("invalid info structure in GOST3410 public key"); + } + + this.gost3410Spec = GOST3410ParameterSpec.fromPublicKeyAlg(params); + } + + public String getAlgorithm() + { + return "GOST3410"; + } + + public String getFormat() + { + return "X.509"; + } + + public byte[] getEncoded() + { + SubjectPublicKeyInfo info; + byte[] keyEnc = this.getY().toByteArray(); + byte[] keyBytes; + + if (keyEnc[0] == 0) + { + keyBytes = new byte[keyEnc.length - 1]; + } + else + { + keyBytes = new byte[keyEnc.length]; + } + + for (int i = 0; i != keyBytes.length; i++) + { + keyBytes[i] = keyEnc[keyEnc.length - 1 - i]; // must be little endian + } + + try + { + if (gost3410Spec instanceof GOST3410ParameterSpec) + { + if (gost3410Spec.getEncryptionParamSetOID() != null) + { + info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94, new GOST3410PublicKeyAlgParameters(new ASN1ObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getDigestParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getEncryptionParamSetOID()))), new DEROctetString(keyBytes)); + } + else + { + info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94, new GOST3410PublicKeyAlgParameters(new ASN1ObjectIdentifier(gost3410Spec.getPublicKeyParamSetOID()), new ASN1ObjectIdentifier(gost3410Spec.getDigestParamSetOID()))), new DEROctetString(keyBytes)); + } + } + else + { + info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_94), new DEROctetString(keyBytes)); + } + + return KeyUtil.getEncodedSubjectPublicKeyInfo(info); + } + catch (IOException e) + { + return null; + } + } + + public GOST3410Params getParameters() + { + return gost3410Spec; + } + + public BigInteger getY() + { + return y; + } + + public String toString() + { + StringBuffer buf = new StringBuffer(); + String nl = System.getProperty("line.separator"); + + buf.append("GOST3410 Public Key").append(nl); + buf.append(" y: ").append(this.getY().toString(16)).append(nl); + + return buf.toString(); + } + + public boolean equals(Object o) + { + if (o instanceof BCGOST3410PublicKey) + { + BCGOST3410PublicKey other = (BCGOST3410PublicKey)o; + + return this.y.equals(other.y) && this.gost3410Spec.equals(other.gost3410Spec); + } + + return false; + } + + public int hashCode() + { + return y.hashCode() ^ gost3410Spec.hashCode(); + } + + private void readObject( + ObjectInputStream in) + throws IOException, ClassNotFoundException + { + in.defaultReadObject(); + + String publicKeyParamSetOID = (String)in.readObject(); + if (publicKeyParamSetOID != null) + { + this.gost3410Spec = new GOST3410ParameterSpec(publicKeyParamSetOID, (String)in.readObject(), (String)in.readObject()); + } + else + { + this.gost3410Spec = new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), (BigInteger)in.readObject())); + in.readObject(); + in.readObject(); + } + } + + private void writeObject( + ObjectOutputStream out) + throws IOException + { + out.defaultWriteObject(); + + if (gost3410Spec.getPublicKeyParamSetOID() != null) + { + out.writeObject(gost3410Spec.getPublicKeyParamSetOID()); + out.writeObject(gost3410Spec.getDigestParamSetOID()); + out.writeObject(gost3410Spec.getEncryptionParamSetOID()); + } + else + { + out.writeObject(null); + out.writeObject(gost3410Spec.getPublicKeyParameters().getP()); + out.writeObject(gost3410Spec.getPublicKeyParameters().getQ()); + out.writeObject(gost3410Spec.getPublicKeyParameters().getA()); + out.writeObject(gost3410Spec.getDigestParamSetOID()); + out.writeObject(gost3410Spec.getEncryptionParamSetOID()); + } + } +} |