diff options
Diffstat (limited to 'id.server/src/at/gv/egovernment/moa/id/util')
| -rw-r--r-- | id.server/src/at/gv/egovernment/moa/id/util/ECDSAConstants.java | 35 | ||||
| -rw-r--r-- | id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java | 574 |
2 files changed, 609 insertions, 0 deletions
diff --git a/id.server/src/at/gv/egovernment/moa/id/util/ECDSAConstants.java b/id.server/src/at/gv/egovernment/moa/id/util/ECDSAConstants.java new file mode 100644 index 000000000..057f56a04 --- /dev/null +++ b/id.server/src/at/gv/egovernment/moa/id/util/ECDSAConstants.java @@ -0,0 +1,35 @@ +/* + * Created on 20.01.2005 + * + * @author rschamberger + * $ID$ + */ +package at.gv.egovernment.moa.id.util; + + +/** + * Class used to define Constants used in Class ECDSAKeyValueConverter + * + * * @author rschamberger + */ +public class ECDSAConstants { + + //TODO change to correct NS as soon BMI updates IdentityLink + static String NAMESPACE_ECDSAKEYVALUE_ = "http://www.w3.org/2004/01/xmldsig-more#"; + + /* Schema instance NS + */ + static String NAMESPACE_XSI_ = "http://www.w3.org/2001/XMLSchema-instance"; + + /* ecdsa prefix value + */ + static String NS_PREFIX_ECDSAKEYVALUE_ = "ecdsa"; + + /* namespace namespace + */ + static String NAMESPACE_NAMESPACES_ = "http://www.w3.org/XML/1998/namespace"; + + /* si prefix value + */ + static String NS_PREFIX_XSI_ = "si"; +}; diff --git a/id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java b/id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java new file mode 100644 index 000000000..ca609a027 --- /dev/null +++ b/id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java @@ -0,0 +1,574 @@ +package at.gv.egovernment.moa.id.util; + +import iaik.ixsil.util.URI; + +import iaik.security.ecc.ecdsa.ECDSAParameter; +import iaik.security.ecc.ecdsa.ECPublicKey; +//import iaik.security.ecc.interfaces.ECDSAPublicKey; +import iaik.security.ecc.math.ecgroup.ECGroupFactory; +import iaik.security.ecc.math.ecgroup.ECPoint; +import iaik.security.ecc.math.ecgroup.EllipticCurve; +import iaik.security.ecc.math.ecgroup.ProjectiveCoordinate; +//import iaik.security.ecc.math.field.BinaryField; +//import iaik.security.ecc.math.field.BinaryFieldValue; +import iaik.security.ecc.math.field.Field; +import iaik.security.ecc.math.field.FieldElement; +import iaik.security.ecc.math.field.FieldFactory; +import iaik.security.ecc.math.field.Value; +import iaik.security.ecc.parameter.ECCParameterFactory; +import iaik.security.ecc.spec.ECCParameterSpec; + +import java.math.BigInteger; +import java.security.PublicKey; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Vector; + +import org.w3c.dom.Attr; +import org.w3c.dom.Document; +import org.w3c.dom.Element; +import org.w3c.dom.NamedNodeMap; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +//import at.gv.cio.identitylink.init.Constants; +import at.gv.egovernment.moa.id.util.ECDSAConstants; + +public class ECDSAKeyValueConverter +{ + + + //TODO enhance javadoc + + /** + * converter class which can be used to convert ECDSA keys encoded in XML + * to a PublicKey data structure + * @param keyValueElem ECDSAKeyValue Element + * @return ECPublicKey encoded in PublicKey data structure + * @throws Exception + * + * @author gregor karlinger + */ +public static PublicKey element2ECDSAPublicKey(Element keyValueElem) throws Exception + { + String ecdsaNS = ECDSAConstants.NAMESPACE_ECDSAKEYVALUE_; + + // Domain parameters + Element domainParams = getChildElement(keyValueElem, ecdsaNS, "DomainParameters", 1); + if (domainParams == null) throw new Exception("Domain parameters must not be implicit."); + + Element namedCurve = getChildElement(domainParams, ecdsaNS, "NamedCurve", 1); + ECCParameterSpec eccParameterSpec; + + if (namedCurve != null) + { + URI curveNameURN = new URI(namedCurve.getAttributeNS(null, "URN")); + ECCParameterFactory eccParamFactory = ECCParameterFactory.getInstance(); + eccParameterSpec = eccParamFactory.getParameterByOID(curveNameURN.getPath().substring(4)); + } + else + { + Element excplicitParams = getChildElement(domainParams, ecdsaNS, "ExplicitParams", 1); + Element fieldParams = getChildElement(excplicitParams, ecdsaNS, "FieldParams", 1); + Element curveParams = getChildElement(excplicitParams, ecdsaNS, "CurveParams", 1); + Element basePointParams = getChildElement(excplicitParams, ecdsaNS, "BasePointParams", 1); + + // Field parameters + String fieldParamsTypeStr = fieldParams.getAttributeNS(ECDSAConstants.NAMESPACE_XSI_, "type"); + String ecdsaNSPrefix = getECDSANSPrefix(fieldParams); + BigInteger p = null; + int fieldParamsType = 0; + final int FIELD_TYPE_PRIME = 1; + final int FIELD_TYPE_TNB = 2; + final int FIELD_TYPE_PNB = 3; + int m = -1, k = -1, k1 = -1, k2 = -1, k3 = -1; + if (fieldParamsTypeStr.equals(ecdsaNSPrefix + ":PrimeFieldParamsType")) + { + fieldParamsType = FIELD_TYPE_PRIME; + String pStr = getChildElementText(fieldParams, ecdsaNS, "P", 1); + p = new BigInteger(pStr, 10); + } + else if (fieldParamsTypeStr.equals(ecdsaNSPrefix + ":TnBFieldParamsType")) + { + fieldParamsType = FIELD_TYPE_TNB; + String mStr = getChildElementText(fieldParams, ecdsaNS, "M", 1); + m = Integer.parseInt(mStr); + String kStr = getChildElementText(fieldParams, ecdsaNS, "K", 1); + k = Integer.parseInt(kStr); + } + else if (fieldParamsTypeStr.equals(ecdsaNSPrefix + ":PnBFieldParamsType")) + { + fieldParamsType = FIELD_TYPE_PNB; + String mStr = getChildElementText(fieldParams, ecdsaNS, "M", 1); + m = Integer.parseInt(mStr); + String k1Str = getChildElementText(fieldParams, ecdsaNS, "K1", 1); + k1 = Integer.parseInt(k1Str); + String k2Str = getChildElementText(fieldParams, ecdsaNS, "K2", 1); + k2 = Integer.parseInt(k2Str); + String k3Str = getChildElementText(fieldParams, ecdsaNS, "K3", 1); + k3 = Integer.parseInt(k3Str); + } + else throw new Exception("Unknown field parameters."); + + // Curve parameters + Element aElem = getChildElement(curveParams, ecdsaNS, "A", 1); + String aStr = aElem.getAttributeNS(null, "Value"); + Element bElem = getChildElement(curveParams, ecdsaNS, "B", 1); + String bStr = bElem.getAttributeNS(null, "Value"); + String seedStr = getChildElementText(curveParams, ecdsaNS, "Seed", 1); + BigInteger seed = (seedStr != null) ? new BigInteger(seedStr, 10) : null; + + // Base point parameters + Element basePoint = getChildElement(basePointParams, ecdsaNS, "BasePoint", 1); + Element basePointXElem = getChildElement(basePoint, ecdsaNS, "X", 1); + String basePointXStr = basePointXElem.getAttributeNS(null, "Value"); + Element basePointYElem = getChildElement(basePoint, ecdsaNS, "Y", 1); + String basePointYStr = basePointYElem.getAttributeNS(null, "Value"); + String orderStr = getChildElementText(basePointParams, ecdsaNS, "Order", 1); + BigInteger order = new BigInteger(orderStr, 10); + String cofactorStr = getChildElementText(basePointParams, ecdsaNS, "Cofactor", 1); + BigInteger cofactor = (cofactorStr != null) ? new BigInteger(cofactorStr, 10) : null; + + if (fieldParamsType == FIELD_TYPE_PRIME) + { + BigInteger a = new BigInteger(aStr, 10); + BigInteger b = new BigInteger(bStr, 10); + BigInteger basePointX = new BigInteger(basePointXStr, 10); + BigInteger basePointY = new BigInteger(basePointYStr, 10); + eccParameterSpec = new ECCParameterSpec(p, cofactor, order, seed, null, a, b, basePointX, + basePointY, null); + } + else + { + int[] irreducible = new int[m/32 + ((m % 32 != 0) ? 1 : 0)]; + if (fieldParamsType == FIELD_TYPE_TNB) + { + irreducible[m/32] = 1 << m % 32; + irreducible[k/32] += 1 << k % 32; + irreducible[0] += 1; + } + else + { + irreducible[m/32] = 1 << m % 32; + irreducible[k3/32] += 1 << k3 % 32; + irreducible[k2/32] += 1 << k2 % 32; + irreducible[k1/32] += 1 << k1 % 32; + irreducible[0] += 1; + } + eccParameterSpec = new ECCParameterSpec(irreducible, cofactor, order, octetString2IntArray(aStr), + octetString2IntArray(bStr), octetString2IntArray(basePointXStr), + octetString2IntArray(basePointYStr), null); + } + } + + // Public key + Element publicKeyElem = getChildElement(keyValueElem, ecdsaNS, "PublicKey", 1); + Element publicKeyXElem = getChildElement(publicKeyElem, ecdsaNS, "X", 1); + String publicKeyXStr = publicKeyXElem.getAttributeNS(null, "Value"); + Element publicKeyYElem = getChildElement(publicKeyElem, ecdsaNS, "Y", 1); + String publicKeyYStr = publicKeyYElem.getAttributeNS(null, "Value"); + + ECDSAParameter ecdsaParams = new ECDSAParameter(eccParameterSpec, false); + ECGroupFactory ecGroupFactory = ECGroupFactory.getInstance(); + EllipticCurve eCurve = ecGroupFactory.getCurveWithProjective(eccParameterSpec.getA(), + eccParameterSpec.getB(), eccParameterSpec.getR()); + Field field = eCurve.getField(); + + // Detect type of public key field elements + String elementType = publicKeyXElem.getAttributeNS(ECDSAConstants.NAMESPACE_XSI_, "type"); + String elementTypeLocalName = elementType.substring(elementType.indexOf(':') + 1); + int FIELD_TYPE_PRIME = 1, FIELD_TYPE_CHAR_TWO = 2; + int fieldElemType = ("PrimeFieldElemType".equals(elementTypeLocalName)) + ? FIELD_TYPE_PRIME + : FIELD_TYPE_CHAR_TWO; + + FieldElement publicKeyPointX, publicKeyPointY; + if (fieldElemType == FIELD_TYPE_PRIME) + { + Value xValue = FieldFactory.getInstance().getPrimeFieldValue(new BigInteger(publicKeyXStr, 10)); + publicKeyPointX = field.newElement(xValue); + Value yValue = FieldFactory.getInstance().getPrimeFieldValue(new BigInteger(publicKeyYStr, 10)); + publicKeyPointY = field.newElement(yValue); + } + else + { + publicKeyPointX = field.newElement(octetString2ByteArray(publicKeyXStr)); + publicKeyPointY = field.newElement(octetString2ByteArray(publicKeyYStr)); + } + ProjectiveCoordinate publicKeyPointCoordinate = new ProjectiveCoordinate(publicKeyPointX, + publicKeyPointY, field.getONEelement()); + ECPoint publicKeyPoint = eCurve.newPoint(publicKeyPointCoordinate); + ECPublicKey publicKey = new ECPublicKey(ecdsaParams, publicKeyPoint); + + return publicKey; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + /* + public static Element publicKey2ECDSAKeyValueElement(boolean implParams, String curveOID, + ECDSAPublicKey publicKey, Document factoryDoc) + { + String ecdsaNS = ECDSAConstants.NAMESPACE_ECDSAKEYVALUE_; + String ecdsaNSP = ECDSAConstants.NS_PREFIX_ECDSAKEYVALUE_; + String nsNS = ECDSAConstants.NAMESPACE_NAMESPACES_; + String xsiNS = ECDSAConstants.NAMESPACE_XSI_; + String xsiNSP = ECDSAConstants.NS_PREFIX_XSI_; + + ECDSAParameter params = (ECDSAParameter)publicKey.getParameter(); + EllipticCurve curve = params.getG().getCurve(); + Field field = curve.getField(); + int fieldId = curve.getField().getFieldId(); + + Element eCDSAKeyValue = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":ECDSAKeyValue"); + eCDSAKeyValue.setAttributeNS(nsNS, "xmlns:" + ecdsaNSP, ecdsaNS); + eCDSAKeyValue.setAttributeNS(nsNS, "xmlns:" + xsiNSP, xsiNS); + + // Detect field type + int coeffPositions[] = new int[3]; + int fieldType = 0; + String fieldElemTypeString = null; + final int FT_PRIME = 1, FT_TNB = 2, FT_PNB = 3; + if (fieldId == Field.PRIME_FIELD) + { + fieldType = FT_PRIME; + fieldElemTypeString = ecdsaNSP + ":PrimeFieldElemType"; + } + else + { + // Get irreducible polynomal + BinaryField binaryField = (BinaryField)field; + BinaryFieldValue irreducible = binaryField.getIrreducible(); + + // Get coefficients of irreducible polynomal + int order = irreducible.getOrder(); + int coeffCount = 2; + for (int i = 1; i < order - 1; i++) + { + if (irreducible.testBit(i)) + { + coeffPositions[coeffCount - 2] = i; + coeffCount++; + if (coeffCount == 5) break; + } + } + + // Set polynomal type (TNB or + fieldType = (coeffCount == 3) ? FT_TNB : FT_PNB; + fieldElemTypeString = ecdsaNSP + ":CharTwoFieldElemType"; + } + + if (!implParams) + { + Element domainParameters = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":DomainParameters"); + eCDSAKeyValue.appendChild(factoryDoc.createTextNode("\n ")); + eCDSAKeyValue.appendChild(domainParameters); + + if (curveOID != null) + { + // Named curve + Element namedCurve = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":NamedCurve"); + namedCurve.setAttributeNS(null, "URN", "urn:oid:" + curveOID); + domainParameters.appendChild(factoryDoc.createTextNode("\n ")); + domainParameters.appendChild(namedCurve); + domainParameters.appendChild(factoryDoc.createTextNode("\n ")); + } + else + { + // Explicit parameters + Element explicitParams = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":ExplicitParams"); + + // Field parameters + Element fieldParams = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":FieldParams"); + explicitParams.appendChild(factoryDoc.createTextNode("\n ")); + explicitParams.appendChild(fieldParams); + + if (fieldType == FT_PRIME) + { + fieldParams.setAttributeNS(xsiNS, xsiNSP + ":type", ecdsaNSP + ":PrimeFieldParamsType"); + Element p = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":P"); + p.appendChild(factoryDoc.createTextNode(curve.getField().getSize().toString(10))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(p); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + } + else if (fieldType == FT_TNB) + { + fieldParams.setAttributeNS(xsiNS, xsiNSP + ":type", ecdsaNSP + ":TnBFieldParamsType"); + Element m = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":M"); + m.appendChild(factoryDoc.createTextNode(Integer.toString(curve.getField().getOrder()))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(m); + + Element k = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":K"); + k.appendChild(factoryDoc.createTextNode(Integer.toString(coeffPositions[0], 10))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(k); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + } + else + { + fieldParams.setAttributeNS(xsiNS, xsiNSP + ":type", ecdsaNSP + ":PnBFieldParamsType"); + Element m = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":M"); + m.appendChild(factoryDoc.createTextNode(Integer.toString(curve.getField().getOrder()))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(m); + + Element k1 = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":K1"); + k1.appendChild(factoryDoc.createTextNode(Integer.toString(coeffPositions[0]))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(k1); + + Element k2 = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":K2"); + k2.appendChild(factoryDoc.createTextNode(Integer.toString(coeffPositions[1]))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(k2); + + Element k3 = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":K3"); + k3.appendChild(factoryDoc.createTextNode(Integer.toString(coeffPositions[2]))); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + fieldParams.appendChild(k3); + fieldParams.appendChild(factoryDoc.createTextNode("\n ")); + } + + // Curve parameters + Element curveParams = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":CurveParams"); + explicitParams.appendChild(factoryDoc.createTextNode("\n ")); + explicitParams.appendChild(curveParams); + + Element a = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":A"); + a.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + a.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? curve.getA().getValue().toBigInt().toString(10) + : evenStringLength(curve.getA().getValue().toBigInt().toString(16))); + curveParams.appendChild(factoryDoc.createTextNode("\n ")); + curveParams.appendChild(a); + + Element b = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":B"); + b.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + b.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? curve.getB().getValue().toBigInt().toString(10) + : evenStringLength(curve.getB().getValue().toBigInt().toString(16))); + curveParams.appendChild(factoryDoc.createTextNode("\n ")); + curveParams.appendChild(b); + + if (params.getS() != null) + { + Element seed = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":Seed"); + seed.appendChild(factoryDoc.createTextNode(evenStringLength(params.getS().toString(16)))); + curveParams.appendChild(factoryDoc.createTextNode("\n ")); + curveParams.appendChild(seed); + } + + curveParams.appendChild(factoryDoc.createTextNode("\n ")); + + // Base point params + Element basePointParams = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":BasePointParams"); + explicitParams.appendChild(factoryDoc.createTextNode("\n ")); + explicitParams.appendChild(basePointParams); + + Element basePoint = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":BasePoint"); + basePointParams.appendChild(factoryDoc.createTextNode("\n ")); + basePointParams.appendChild(basePoint); + + Element x = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":X"); + x.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + x.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? params.getG().getCoordinates().getX().getValue().toBigInt().toString(10) + : evenStringLength(params.getG().getCoordinates().getX().getValue().toBigInt().toString(16))); + basePoint.appendChild(factoryDoc.createTextNode("\n ")); + basePoint.appendChild(x); + + Element y = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":Y"); + y.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + y.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? params.getG().getCoordinates().getY().getValue().toBigInt().toString(10) + : evenStringLength(params.getG().getCoordinates().getY().getValue().toBigInt().toString(16))); + basePoint.appendChild(factoryDoc.createTextNode("\n ")); + basePoint.appendChild(y); + basePoint.appendChild(factoryDoc.createTextNode("\n ")); + + Element order = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":Order"); + order.appendChild(factoryDoc.createTextNode(params.getR().toString(10))); + basePointParams.appendChild(factoryDoc.createTextNode("\n ")); + basePointParams.appendChild(order); + + if (params.getK() != null) + { + Element cofactor = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":Cofactor"); + cofactor.appendChild(factoryDoc.createTextNode(params.getK().toString(10))); + basePointParams.appendChild(factoryDoc.createTextNode("\n ")); + basePointParams.appendChild(cofactor); + } + + basePointParams.appendChild(factoryDoc.createTextNode("\n ")); + explicitParams.appendChild(factoryDoc.createTextNode("\n ")); + + domainParameters.appendChild(factoryDoc.createTextNode("\n ")); + domainParameters.appendChild(explicitParams); + domainParameters.appendChild(factoryDoc.createTextNode("\n ")); + } + } + + // Public key point + Element publicKeyPoint = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":PublicKey"); + + Element publicKeyX = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":X"); + publicKeyX.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + publicKeyX.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? publicKey.getW().getCoordinates().getX().getValue().toBigInt().toString(10) + : evenStringLength(publicKey.getW().getCoordinates().getX().getValue().toBigInt().toString(16))); + publicKeyPoint.appendChild(factoryDoc.createTextNode("\n ")); + publicKeyPoint.appendChild(publicKeyX); + + Element publicKeyY = factoryDoc.createElementNS(ecdsaNS, ecdsaNSP + ":Y"); + publicKeyY.setAttributeNS(xsiNS, xsiNSP + ":type", fieldElemTypeString); + publicKeyY.setAttributeNS(null, "Value", + (fieldId == Field.PRIME_FIELD) + ? publicKey.getW().getCoordinates().getY().getValue().toBigInt().toString(10) + : evenStringLength(publicKey.getW().getCoordinates().getY().getValue().toBigInt().toString(16))); + publicKeyPoint.appendChild(factoryDoc.createTextNode("\n ")); + publicKeyPoint.appendChild(publicKeyY); + publicKeyPoint.appendChild(factoryDoc.createTextNode("\n ")); + + eCDSAKeyValue.appendChild(factoryDoc.createTextNode("\n ")); + eCDSAKeyValue.appendChild(publicKeyPoint); + eCDSAKeyValue.appendChild(factoryDoc.createTextNode("\n ")); + + return eCDSAKeyValue; + } + */ + /* ---------------------------------------------------------------------------------------------------- */ + + private static String getECDSANSPrefix(Element element) + { + // FIXXME: Review this function (GK, 11.06.2002) - should return a list of strings, since more than + // one NS prefix can be bound to the ECDSA namespace + + HashMap inScopeNSAttrs = getInScopeNSAttrs(element); + Iterator inScopeNSAttrsIt = inScopeNSAttrs.keySet().iterator(); + while (inScopeNSAttrsIt.hasNext()) + { + Attr currentAttr = (Attr)inScopeNSAttrs.get(inScopeNSAttrsIt.next()); + if (ECDSAConstants.NAMESPACE_ECDSAKEYVALUE_.equals(currentAttr.getValue())) + { + return ("xmlns".equals(currentAttr.getNodeName())) ? "" : currentAttr.getNodeName().substring(6); + } + } + return null; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + // Converts an octet string representation into an int array as needed for the IAIK ECC library + // String: rightmost byte is least significant byte + // IntArray: rightmost byte is LEAST significant byte + private static int[] octetString2IntArray(String octetString) + { + int byteCount = octetString.length()/2; + int[] intArray = new int[byteCount/4 + ((byteCount % 4 != 0) ? 1 : 0)]; + for (int i = 0; i < byteCount; i++) + { + int oSStartPos = octetString.length() - (i + 1) * 2; + int currentByte = Integer.parseInt(octetString.substring(oSStartPos, oSStartPos + 2), 16); + intArray[i/4] += (currentByte & 0xFF) << ((i % 4) * 8); + } + return intArray; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + // Converts an octet string representation into a byte array as needed for the IAIK ECC library + // String: rightmost byte is least significant byte + // ByteArray: rightmost byte is MOST significant byte + private static byte[] octetString2ByteArray(String octetString) + { + int byteCount = octetString.length()/2; + byte[] byteArray = new byte[byteCount]; + for (int i = 0; i < byteCount; i++) + { + int oSStartPos = octetString.length() - (i + 1) * 2; + byteArray[byteCount - i - 1] = (byte) Integer.parseInt(octetString.substring( + oSStartPos, oSStartPos + 2), 16); + } + return byteArray; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + private static String evenStringLength(String hexString) + { + return (hexString.length() % 2 != 0) ? "0" + hexString : hexString; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + private static Element getChildElement(Element parent, String namespace, String localName, + int instance) + { + NodeList namedElements = parent.getElementsByTagNameNS(namespace, localName); + if (namedElements.getLength() < instance) return null; + return (Element)namedElements.item(instance - 1); + } + + /* ---------------------------------------------------------------------------------------------------- */ + + private static String getChildElementText(Element parent, String namespace, String localName, + int instance) + { + Element child = getChildElement(parent, namespace, localName, instance); + if (child == null) return null; + NodeList childNodes = child.getChildNodes(); + int nodeCount = 0; + while (nodeCount < childNodes.getLength()) + { + Node currentNode = childNodes.item(nodeCount); + if (currentNode.getNodeType() == Node.TEXT_NODE) return currentNode.getNodeValue(); + nodeCount++; + } + return null; + } + + /* ---------------------------------------------------------------------------------------------------- */ + + public static HashMap getInScopeNSAttrs(Element element) + { + // Get all ancestors of element + Vector ancestors = new Vector(); + ancestors.add(element); + Node currentAncestor = element; + while ((currentAncestor = currentAncestor.getParentNode()) != null && + currentAncestor.getNodeType() == Node.ELEMENT_NODE) + { + ancestors.add(currentAncestor); + } + + // Scan all ancestors for NS attributes + HashMap inScopeNSAttrs = new HashMap(); + for (int i = ancestors.size() - 1; i >= 0; i--) + { + Element currentAncestorElem = (Element)ancestors.get(i); + NamedNodeMap attrs = currentAncestorElem.getAttributes(); + for (int j = 0; j < attrs.getLength(); j++) + { + Attr currentAttr = (Attr)attrs.item(j); + String currentAttrName = currentAttr.getNodeName(); + if ("xmlns".equals(currentAttrName) || currentAttrName.startsWith("xmlns:")) + { + inScopeNSAttrs.put(currentAttrName, currentAttr); + } + } + } + + // Check if default NS attribute is in list; if value is empty remove it from list + Attr defaultNSAttr = (Attr)inScopeNSAttrs.get("xmlns"); + if (defaultNSAttr != null && "".equals(defaultNSAttr.getValue())) inScopeNSAttrs.remove("xmlns"); + + return inScopeNSAttrs; + } +}
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