package org.uic.barcode.dynamicFrame; import java.security.InvalidKeyException; import java.security.KeyFactory; import java.security.NoSuchAlgorithmException; import java.security.PrivateKey; import java.security.PublicKey; import java.security.Signature; import java.security.SignatureException; import java.security.spec.InvalidKeySpecException; import java.security.spec.X509EncodedKeySpec; import org.uic.barcode.utils.AlgorithmNameResolver; import net.gcdc.asn1.datatypes.Asn1Optional; import net.gcdc.asn1.datatypes.CharacterRestriction; import net.gcdc.asn1.datatypes.HasExtensionMarker; import net.gcdc.asn1.datatypes.RestrictedString; import net.gcdc.asn1.datatypes.Sequence; import net.gcdc.asn1.datatypesimpl.OctetString; import net.gcdc.asn1.uper.UperEncoder; /** * The DynamicHeader for bar codes * * Implementation of the Draft under discussion, not final. */ @Sequence @HasExtensionMarker public class DynamicFrame extends Object{ public DynamicFrame() {} /** The format. */ @RestrictedString(CharacterRestriction.IA5String) public String format; /*level 2 data*/ Level2DataType level2SignedData; /** The signature of level 2 data*/ @Asn1Optional public OctetString level2Signature; /** * Gets the format. * * @return the format */ public String getFormat() { return format; } /** * Sets the format. * * @param format the new format */ public void setFormat(String format) { this.format = format; } public Level2DataType getLevel2SignedData() { return level2SignedData; } public void setLevel2SignedData(Level2DataType level2SignedData) { this.level2SignedData = level2SignedData; } public OctetString getLevel2Signature() { return level2Signature; } public void setLevel2Signature(OctetString level2Signature) { this.level2Signature = level2Signature; } /** * Encode. * * Encode the header as ASN.1 PER UNALIGNED byte array * * @return the byte[] */ public byte[] encode() { return UperEncoder.encode(this); } /** * Decode. * * Decode the header from an ASN.1 PER UNALIGNED encoded byte array * * @param bytes the bytes * @return the dynamic header */ public static DynamicFrame decode(byte[] bytes) { return UperEncoder.decode(bytes, DynamicFrame.class); } /** * Verify the level 2 signature * * Note: an appropriate security provider (e.g. BC) must be registered before * */ public int validateLevel2() { String level2KeyAlg = this.getLevel2SignedData().getLevel1Data().level2KeyAlg; if (level2KeyAlg == null || level2KeyAlg.length() == 0) { return Constants.LEVEL2_VALIDATION_NO_KEY; } if (this.level2Signature.toByteArray() == null || this.level2Signature.toByteArray().length == 0) { return Constants.LEVEL2_VALIDATION_NO_SIGNATURE; } String keyAlgName = null; try { keyAlgName = AlgorithmNameResolver.getName(AlgorithmNameResolver.TYPE_KEY_GENERATOR_ALG, level2KeyAlg); } catch (Exception e1) { return Constants.LEVEL2_VALIDATION_KEY_ALG_NOT_IMPLEMENTED; } if (keyAlgName == null || keyAlgName.length() == 0) { return Constants.LEVEL2_VALIDATION_KEY_ALG_NOT_IMPLEMENTED; } PublicKey key = null; try { key = KeyFactory.getInstance(keyAlgName).generatePublic(new X509EncodedKeySpec(this.getLevel2SignedData().getLevel1Data().level2publicKey.toByteArray())); } catch (InvalidKeySpecException | NoSuchAlgorithmException e1) { return Constants.LEVEL2_VALIDATION_KEY_ALG_NOT_IMPLEMENTED; } //find the algorithm name for the signature OID String algo = null; try { algo = AlgorithmNameResolver.getName(AlgorithmNameResolver.TYPE_SIGNATURE_ALG,this.getLevel2SignedData().getLevel1Data().level2SigningAlg); } catch (Exception e1) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } if (algo == null) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } Signature sig; try { sig = Signature.getInstance(algo); } catch (NoSuchAlgorithmException e) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } try { sig.initVerify(key); } catch (InvalidKeyException e) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } try { sig.update(UperEncoder.encode(level2SignedData)); } catch (SignatureException e) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } catch (IllegalArgumentException e) { return Constants.LEVEL2_VALIDATION_ENCODING_ERROR; } catch (UnsupportedOperationException e) { return Constants.LEVEL2_VALIDATION_ENCODING_ERROR; } byte[] signature = level2Signature.toByteArray(); try { if (sig.verify(signature)){ return Constants.LEVEL2_VALIDATION_OK; } else { return Constants.LEVEL2_VALIDATION_FRAUD; } } catch (SignatureException e) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } } /** * Verify the level 1 signature * * Note: an appropriate security provider (e.g. BC) must be registered before * */ public int validateLevel1(PublicKey key) { if (this.level2SignedData == null) { return Constants.LEVEL1_VALIDATION_NO_SIGNATURE; } if (this.level2SignedData.level1Signature == null || this.level2SignedData.level1Signature.toByteArray().length == 0) { return Constants.LEVEL1_VALIDATION_NO_SIGNATURE; } byte[] signature = this.getLevel2SignedData().level1Signature.toByteArray(); //find the algorithm name for the signature OID String algo = null; try { algo = AlgorithmNameResolver.getSignatureAlgorithmName(getLevel2SignedData().getLevel1Data().level1SigningAlg); } catch (Exception e1) { return Constants.LEVEL1_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } if (algo == null) { return Constants.LEVEL1_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } Signature sig; try { sig = Signature.getInstance(algo); } catch (NoSuchAlgorithmException e) { return Constants.LEVEL1_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } try { sig.initVerify(key); } catch (InvalidKeyException e) { return Constants.LEVEL1_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } try { sig.update(this.level2SignedData.level1Data.encode()); } catch (SignatureException e) { return Constants.LEVEL1_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } catch (IllegalArgumentException e) { return Constants.LEVEL1_VALIDATION_ENCODING_ERROR; } catch (UnsupportedOperationException e) { return Constants.LEVEL1_VALIDATION_ENCODING_ERROR; } try { if (sig.verify(signature)){ return Constants.LEVEL2_VALIDATION_OK; } else { return Constants.LEVEL2_VALIDATION_FRAUD; } } catch (SignatureException e) { return Constants.LEVEL2_VALIDATION_SIG_ALG_NOT_IMPLEMENTED; } } public void signLevel2(PrivateKey key) throws Exception { //find the algorithm name for the signature OID String algo = AlgorithmNameResolver.getSignatureAlgorithmName(this.getLevel2SignedData().getLevel1Data().level2SigningAlg); Signature sig = Signature.getInstance(algo); sig.initSign(key); byte[] data = level2SignedData.encode(); sig.update(data); this.level2Signature = new OctetString(sig.sign()); } }