diff options
Diffstat (limited to 'prov/src/main/jdk1.1/org/spongycastle/jcajce/provider/asymmetric/dsa/DSASigner.java')
| -rw-r--r-- | prov/src/main/jdk1.1/org/spongycastle/jcajce/provider/asymmetric/dsa/DSASigner.java | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/prov/src/main/jdk1.1/org/spongycastle/jcajce/provider/asymmetric/dsa/DSASigner.java b/prov/src/main/jdk1.1/org/spongycastle/jcajce/provider/asymmetric/dsa/DSASigner.java new file mode 100644 index 00000000..16fe1696 --- /dev/null +++ b/prov/src/main/jdk1.1/org/spongycastle/jcajce/provider/asymmetric/dsa/DSASigner.java @@ -0,0 +1,280 @@ +package org.spongycastle.jcajce.provider.asymmetric.dsa; + +import java.io.IOException; +import java.math.BigInteger; +import java.security.InvalidKeyException; +import java.security.PrivateKey; +import java.security.PublicKey; +import java.security.SecureRandom; +import java.security.SignatureException; +import java.security.Signature; +import java.security.interfaces.DSAKey; +import java.security.spec.AlgorithmParameterSpec; + +import org.spongycastle.asn1.ASN1Encoding; +import org.spongycastle.asn1.ASN1Integer; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.DERSequence; +import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers; +import org.spongycastle.asn1.x509.SubjectPublicKeyInfo; +import org.spongycastle.asn1.x509.X509ObjectIdentifiers; +import org.spongycastle.crypto.CipherParameters; +import org.spongycastle.crypto.DSA; +import org.spongycastle.crypto.Digest; +import org.spongycastle.crypto.digests.NullDigest; +import org.spongycastle.crypto.digests.SHA1Digest; +import org.spongycastle.crypto.digests.SHA224Digest; +import org.spongycastle.crypto.digests.SHA256Digest; +import org.spongycastle.crypto.digests.SHA384Digest; +import org.spongycastle.crypto.digests.SHA512Digest; +import org.spongycastle.crypto.params.ParametersWithRandom; + +public class DSASigner + extends Signature + implements PKCSObjectIdentifiers, X509ObjectIdentifiers +{ + private Digest digest; + private DSA signer; + private SecureRandom random; + + protected DSASigner( + Digest digest, + DSA signer) + { + super("DSA"); + this.digest = digest; + this.signer = signer; + } + + protected void engineInitVerify( + PublicKey publicKey) + throws InvalidKeyException + { + CipherParameters param; + +// if (publicKey instanceof GOST3410Key) +// { +// param = GOST3410Util.generatePublicKeyParameter(publicKey); +// } +// else if (publicKey instanceof DSAKey) + if (publicKey instanceof DSAKey) + { + param = DSAUtil.generatePublicKeyParameter(publicKey); + } + else + { + try + { + byte[] bytes = publicKey.getEncoded(); + + publicKey = new BCDSAPublicKey(SubjectPublicKeyInfo.getInstance(bytes)); + + if (publicKey instanceof DSAKey) + { + param = DSAUtil.generatePublicKeyParameter(publicKey); + } + else + { + throw new InvalidKeyException("can't recognise key type in DSA based signer"); + } + } + catch (Exception e) + { + throw new InvalidKeyException("can't recognise key type in DSA based signer"); + } + } + + digest.reset(); + signer.init(false, param); + } + + protected void engineInitSign( + PrivateKey privateKey, + SecureRandom random) + throws InvalidKeyException + { + this.random = random; + engineInitSign(privateKey); + } + + protected void engineInitSign( + PrivateKey privateKey) + throws InvalidKeyException + { + CipherParameters param; + +// if (privateKey instanceof GOST3410Key) +// { +// param = GOST3410Util.generatePrivateKeyParameter(privateKey); +// } +// else +// { + param = DSAUtil.generatePrivateKeyParameter(privateKey); +// } + + if (random != null) + { + param = new ParametersWithRandom(param, random); + } + + digest.reset(); + signer.init(true, param); + } + + protected void engineUpdate( + byte b) + throws SignatureException + { + digest.update(b); + } + + protected void engineUpdate( + byte[] b, + int off, + int len) + throws SignatureException + { + digest.update(b, off, len); + } + + protected byte[] engineSign() + throws SignatureException + { + byte[] hash = new byte[digest.getDigestSize()]; + + digest.doFinal(hash, 0); + + try + { + BigInteger[] sig = signer.generateSignature(hash); + + return derEncode(sig[0], sig[1]); + } + catch (Exception e) + { + throw new SignatureException(e.toString()); + } + } + + protected boolean engineVerify( + byte[] sigBytes) + throws SignatureException + { + byte[] hash = new byte[digest.getDigestSize()]; + + digest.doFinal(hash, 0); + + BigInteger[] sig; + + try + { + sig = derDecode(sigBytes); + } + catch (Exception e) + { + throw new SignatureException("error decoding signature bytes."); + } + + return signer.verifySignature(hash, sig[0], sig[1]); + } + + protected void engineSetParameter( + AlgorithmParameterSpec params) + { + throw new UnsupportedOperationException("engineSetParameter unsupported"); + } + + /** + * @deprecated replaced with <a href = "#engineSetParameter(java.security.spec.AlgorithmParameterSpec)"> + */ + protected void engineSetParameter( + String param, + Object value) + { + throw new UnsupportedOperationException("engineSetParameter unsupported"); + } + + /** + * @deprecated + */ + protected Object engineGetParameter( + String param) + { + throw new UnsupportedOperationException("engineSetParameter unsupported"); + } + + private byte[] derEncode( + BigInteger r, + BigInteger s) + throws IOException + { + ASN1Integer[] rs = new ASN1Integer[]{ new ASN1Integer(r), new ASN1Integer(s) }; + return new DERSequence(rs).getEncoded(ASN1Encoding.DER); + } + + private BigInteger[] derDecode( + byte[] encoding) + throws IOException + { + ASN1Sequence s = (ASN1Sequence)ASN1Primitive.fromByteArray(encoding); + return new BigInteger[]{ + ((ASN1Integer)s.getObjectAt(0)).getValue(), + ((ASN1Integer)s.getObjectAt(1)).getValue() + }; + } + + static public class stdDSA + extends DSASigner + { + public stdDSA() + { + super(new SHA1Digest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } + + static public class dsa224 + extends DSASigner + { + public dsa224() + { + super(new SHA224Digest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } + + static public class dsa256 + extends DSASigner + { + public dsa256() + { + super(new SHA256Digest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } + + static public class dsa384 + extends DSASigner + { + public dsa384() + { + super(new SHA384Digest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } + + static public class dsa512 + extends DSASigner + { + public dsa512() + { + super(new SHA512Digest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } + + static public class noneDSA + extends DSASigner + { + public noneDSA() + { + super(new NullDigest(), new org.spongycastle.crypto.signers.DSASigner()); + } + } +} |