diff options
Diffstat (limited to 'id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java')
| -rw-r--r-- | id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java | 574 |
1 files changed, 0 insertions, 574 deletions
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 deleted file mode 100644 index 2567cd739..000000000 --- a/id.server/src/at/gv/egovernment/moa/id/util/ECDSAKeyValueConverter.java +++ /dev/null @@ -1,574 +0,0 @@ -package at.gv.egovernment.moa.id.util; - -import iaik.security.ecc.ecdsa.ECDSAParameter; -import iaik.security.ecc.ecdsa.ECPublicKey; -import iaik.security.ecc.math.ecgroup.AffineCoordinate; -import iaik.security.ecc.math.ecgroup.Coordinate; -import iaik.security.ecc.math.ecgroup.CoordinateTypes; -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.field.Field; -import iaik.security.ecc.math.field.FieldElement; -import iaik.security.ecc.math.field.PrimeField; -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.Element; -import org.w3c.dom.NamedNodeMap; -import org.w3c.dom.Node; -import org.w3c.dom.NodeList; - -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) - { - // URL curveNameURN = new URL(namedCurve.getAttributeNS(null, "URN")); - String curveNameOID = namedCurve.getAttributeNS(null, "URN").substring(8); - ECCParameterFactory eccParamFactory = ECCParameterFactory.getInstance(); - // eccParameterSpec = eccParamFactory.getParameterByOID(curveNameURN.getPath().substring(4)); - eccParameterSpec = eccParamFactory.getParameterByOID(curveNameOID); - } - 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, CoordinateTypes.PROJECTIVE_COORDINATES); - ECGroupFactory ecGroupFactory = ECGroupFactory.getInstance(); - EllipticCurve eCurve = ecGroupFactory.getCurve(eccParameterSpec.getA(), - eccParameterSpec.getB(), eccParameterSpec.getR(), CoordinateTypes.PROJECTIVE_COORDINATES); - 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); - PrimeField pf = (PrimeField) field; - publicKeyPointX = pf.newElement(new BigInteger(publicKeyXStr, 10)); -// Value yValue = FieldFactory.getInstance().getPrimeFieldValue(new BigInteger(publicKeyYStr, 10)); -// publicKeyPointY = field.newElement(yValue); - publicKeyPointY = pf.newElement(new BigInteger(publicKeyYStr, 10)); - } - else - { - publicKeyPointX = field.newElement(octetString2ByteArray(publicKeyXStr)); - publicKeyPointY = field.newElement(octetString2ByteArray(publicKeyYStr)); - } -// ProjectiveCoordinate publicKeyPointCoordinate = new ProjectiveCoordinate(publicKeyPointX, -// publicKeyPointY, field.getONEelement()); - Coordinate publicKeyPointCoordinate = new AffineCoordinate(publicKeyPointX, - publicKeyPointY).toProjective(); - 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; - } -}
\ No newline at end of file |