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authorCGantert345 <57003061+CGantert345@users.noreply.github.com>2020-01-03 10:37:01 +0100
committerGitHub <noreply@github.com>2020-01-03 10:37:01 +0100
commit46039355e87825a9dce12ebaad0305d20eea3f43 (patch)
tree6b17c400a9b98d2a6ec367deeea9597ac2c78e5b /src/net/gcdc/asn1/uper/UperEncoder.java
parentlogging (diff)
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Diffstat (limited to 'src/net/gcdc/asn1/uper/UperEncoder.java')
-rw-r--r--src/net/gcdc/asn1/uper/UperEncoder.java694
1 files changed, 694 insertions, 0 deletions
diff --git a/src/net/gcdc/asn1/uper/UperEncoder.java b/src/net/gcdc/asn1/uper/UperEncoder.java
new file mode 100644
index 0000000..f9c2f2a
--- /dev/null
+++ b/src/net/gcdc/asn1/uper/UperEncoder.java
@@ -0,0 +1,694 @@
+package net.gcdc.asn1.uper;
+
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.math.BigInteger;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import logger.Logger;
+import logger.LoggerFactory;
+
+import net.gcdc.asn1.datatypes.Asn1Default;
+import net.gcdc.asn1.datatypes.Asn1Optional;
+import net.gcdc.asn1.datatypes.HasExtensionMarker;
+import net.gcdc.asn1.datatypes.IntRange;
+import net.gcdc.asn1.datatypes.IsExtension;
+import net.gcdc.asn1.datatypes.NoAsn1Field;
+import net.gcdc.asn1.datatypes.SizeRange;
+
+
+
+/** A "quick-and-dirty" implementation of ASN.1 encoder for UPER (Unaligned Packed Encoding Rules).
+ *
+ * @see ITU-T Recommendation <a
+ * href="http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=x.691">X.691</a>
+ *
+ * TODO: Cover the rest of (useful) ASN.1 datatypes and PER-visible constraints,
+ * write unit tests for them. Clean-up, do more refactoring.
+ **/
+public final class UperEncoder {
+ public final static Logger logger = LoggerFactory.getLogger("asnLogger");
+
+ private final static int NUM_16K = 16384;
+ @SuppressWarnings("unused")
+ private final static int NUM_32K = 32768;
+ @SuppressWarnings("unused")
+ private final static int NUM_48K = 49152;
+ @SuppressWarnings("unused")
+ private final static int NUM_64K = 65536;
+
+ private UperEncoder(){}
+
+ public static <T> byte[] encode(T obj)
+ throws IllegalArgumentException, UnsupportedOperationException {
+ try {
+ BitBuffer bitbuffer = ByteBitBuffer.createInfinite();
+ encode2(bitbuffer, obj, new Annotation[] {});
+ bitbuffer.flip();
+ byte[] result = Arrays.copyOf(bitbuffer.array(), (bitbuffer.limit() + 7) / 8);
+ return result;
+ } catch (IllegalArgumentException e) {
+ throw new IllegalArgumentException("Can't encode " + obj.getClass().getName() + ": " + e, e);
+ } catch (Asn1EncodingException e) {
+ throw new IllegalArgumentException("Can't encode " + obj.getClass().getName() + ":" + e.getMessage(), e);
+ }
+ }
+
+ public static <T> T decode(byte[] bytes, Class<T> classOfT) throws IllegalArgumentException,
+ UnsupportedOperationException {
+ BitBuffer bitQueue = bitBufferFromBinaryString(binaryStringFromBytes(bytes));
+ T result = decodeAny(bitQueue, classOfT,null, new Annotation[] {});
+ if (bitQueue.remaining() > 7) {
+ throw new IllegalArgumentException("Can't fully decode "
+ + classOfT.getName() + ", got (" + result.getClass().getName() + "): " + result
+ + "; remaining " + bitQueue.remaining() + " bits: " + bitQueue);
+ }
+ return result;
+ }
+
+ public static <T> T decode(byte[] bytes, Class<T> classOfT, Field f) throws IllegalArgumentException,
+ UnsupportedOperationException {
+ BitBuffer bitQueue = bitBufferFromBinaryString(binaryStringFromBytes(bytes));
+ T result = decodeAny(bitQueue, classOfT, f, new Annotation[] {});
+ if (bitQueue.remaining() > 7) {
+ throw new IllegalArgumentException("Can't fully decode "
+ + classOfT.getName() + ", got (" + result.getClass().getName() + "): " + result
+ + "; remaining " + bitQueue.remaining() + " bits: " + bitQueue);
+ }
+ return result;
+ }
+
+
+ static <T> void encode2(BitBuffer bitbuffer, T obj, Annotation[] extraAnnotations) throws Asn1EncodingException {
+ for (Encoder e : encoders) {
+ if (e.canEncode(obj, extraAnnotations)) {
+ e.encode(bitbuffer, obj, extraAnnotations);
+ return;
+ }
+ }
+ logger.debug(String.format("Can't find encoder for %s",obj.getClass().getSimpleName()));
+
+ throw new IllegalArgumentException("Can't find encoder for " + obj.getClass().getName()
+ + " with extra annotations " + Arrays.asList(extraAnnotations));
+ }
+
+ static <T> T decodeAny(BitBuffer bitbuffer,Class<T> classOfT, Field f, Annotation[] extraAnnotations) {
+
+ logger.debug(String.format(String.format("Decoding classOfT : %s",classOfT.getCanonicalName())));
+
+ for (Decoder e : decoders) {
+ if (e.canDecode(classOfT, extraAnnotations)) {
+ return e.decode(bitbuffer, classOfT,f, extraAnnotations);
+ }
+ }
+
+ logger.debug(String.format("Can't find decoder for %s",classOfT.getSimpleName()));
+
+ throw new IllegalArgumentException("Can't find decoder for " + classOfT.getName()
+ + " with extra annotations " + Arrays.asList(extraAnnotations));
+ }
+
+ static <T> T getDefault(Class<T> classOfT, Annotation[] annotations) {
+ AnnotationStore annots = new AnnotationStore(classOfT.getAnnotations(), annotations);
+ Asn1Default defaultAnnotation = annots.getAnnotation(Asn1Default.class);
+
+ if (defaultAnnotation == null){
+ return null;
+ }
+
+ Annotation[] defaultAnnots = new Annotation[] {defaultAnnotation};
+
+ for (Decoder e : decoders) {
+ if (e.canDecode(classOfT, defaultAnnots)) {
+ return e.getDefault(classOfT, defaultAnnots);
+ }
+ }
+ logger.debug(String.format("Can't find decoder for %s",classOfT.getSimpleName()));
+
+ throw new IllegalArgumentException("Can't find default for " + classOfT.getName()
+ + " with extra annotations " + defaultAnnotation.toString());
+ }
+
+ static IntRange newRange(
+ final long minValue,
+ final long maxValue,
+ final boolean hasExtensionMarker) {
+
+ return new IntRange() {
+ @Override public Class<? extends Annotation> annotationType() {
+ return IntRange.class;
+ }
+ @Override public long minValue() { return minValue; }
+ @Override public long maxValue() { return maxValue; }
+ @Override public boolean hasExtensionMarker() { return hasExtensionMarker; }
+ };
+ }
+
+ static IntRange intRangeFromSizeRange(SizeRange sizeRange) {
+ return newRange(sizeRange.minValue(), sizeRange.maxValue(), sizeRange.hasExtensionMarker());
+ }
+
+ private static List<Encoder> encoders = new ArrayList<>();
+ private static List<Decoder> decoders = new ArrayList<>();
+
+ static {
+ encoders.add(new IntCoder());
+ //encoders.add(new BigIntCoder());
+ encoders.add(new ByteCoder());
+ encoders.add(new BooleanCoder());
+ encoders.add(new SequenceCoder());
+ encoders.add(new ChoiceCoder());
+ encoders.add(new EnumCoder());
+ encoders.add(new BitStringCoder());
+ encoders.add(new SeqOfCoder());
+ encoders.add(new StringCoder());
+
+ decoders.add(new IntCoder());
+ //decoders.add(new BigIntCoder());
+ decoders.add(new ByteCoder());
+ decoders.add(new BooleanCoder());
+ decoders.add(new SequenceCoder());
+ decoders.add(new ChoiceCoder());
+ decoders.add(new EnumCoder());
+ decoders.add(new BitStringCoder());
+ decoders.add(new SeqOfCoder());
+ decoders.add(new StringCoder());
+
+ }
+
+
+ static <T> void encodeAsOpenType(
+ BitBuffer bitbuffer, T obj, Annotation[] extraAnnotations)
+ throws IllegalArgumentException, IllegalAccessException, Asn1EncodingException {
+ logger.debug(String.format("OPEN TYPE for {%s}. Encoding preceedes length determinant" ,obj != null ? obj.getClass().getSimpleName() : "null"));
+ BitBuffer tmpbuffer = ByteBitBuffer.createInfinite();
+ encode2(tmpbuffer, obj, extraAnnotations);
+ int numBytes = (tmpbuffer.position() + 7) / 8;
+ logger.debug(String.format("Encoding open type length determinant (%d) for %s (will be inserted before the open type content)", numBytes, obj != null ? obj.getClass().getName() : "null" ));
+ try {
+ encodeLengthDeterminant(bitbuffer, numBytes);
+ } catch (Asn1EncodingException e) {
+ throw new Asn1EncodingException(" length of open type ", e);
+ }
+ tmpbuffer.flip();
+ for (int i = 0; i < tmpbuffer.limit(); i++) {
+ bitbuffer.put(tmpbuffer.get());
+ }
+ //CG padding bits to fill the byte: Open Types are wrapped in an OCTET STRING
+ int paddingBits = numBytes*8 - tmpbuffer.limit();
+ for (int i = 0; i < paddingBits; i++) {
+ bitbuffer.put(false);
+ }
+
+ }
+
+ static <T> T decodeAsOpenType(BitBuffer bitbuffer, Class<T> classOfT,Field f, Annotation[] extraAnnotations) {
+ logger.debug(String.format("OPEN TYPE for %s. Encoding preceedes length determinant", classOfT != null ? classOfT.getName() : "null"));
+ long numBytes = decodeLengthDeterminant(bitbuffer);
+ BitBuffer openTypeBitBuffer = ByteBitBuffer.allocate((int)numBytes * 8);
+ for (int i = 0; i < numBytes * 8; i++) {
+ openTypeBitBuffer.put(bitbuffer.get());
+ }
+ openTypeBitBuffer.flip();
+ if (classOfT != null) {
+ T result = decodeAny(openTypeBitBuffer, classOfT, f, extraAnnotations);
+ // Assert that padding bits are all 0.
+ logger.debug(String.format("open type had padding bits"));
+ for (int i = 0; i < openTypeBitBuffer.remaining(); i++) {
+ boolean paddingBit = openTypeBitBuffer.get();
+ logger.debug(String.format("padding bit %d was <%s>", i, paddingBit ? "1" : "0"));
+ if (paddingBit) {
+ throw new IllegalArgumentException("non-zero padding bit " + i + " for open type " + classOfT.getSimpleName()); }
+ }
+ return result;
+ } else {
+ return null;
+ }
+ }
+
+ /*
+ * skip an unknown extension element
+ * - decode length
+ * - skip the bytes according to the length
+ */
+ static void decodeSkipUnknownElement(BitBuffer bitbuffer, String name) {
+ logger.debug(String.format("Skip unknown extension in %s. Encoding preceedes length determinant", name));
+ long numBytes = decodeLengthDeterminant(bitbuffer);
+ for (int i = 0; i < numBytes * 8; i++) {
+ bitbuffer.get();
+ }
+ logger.debug(String.format(String.format("Skiped %d bytes", numBytes)));
+ }
+
+ static <T> boolean hasNonNullExtensions(
+ T obj, Asn1ContainerFieldSorter sorter)
+ throws IllegalArgumentException, IllegalAccessException {
+ for (Field f : sorter.extensionFields) {
+ //CG elements with default value will not be not included
+ if (f.get(obj) != null && !isDefault(f,f.get(obj)) ) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ private static <T> Constructor<T> findConsturctor(Class<T> classOfT, Object... parameters) {
+ @SuppressWarnings("unchecked")
+ Constructor<T>[] declaredConstructors = (Constructor<T>[]) classOfT
+ .getDeclaredConstructors();
+ for (Constructor<T> c : declaredConstructors) {
+ Class<?>[] parameterTypes = c.getParameterTypes();
+ if (parameterTypes.length == parameters.length) {
+ boolean constructorIsOk = true;
+ for (int i = 0; i < parameters.length; i++) {
+ if (!parameterTypes[i].isAssignableFrom(parameters[i].getClass())) {
+ constructorIsOk = false;
+ break;
+ }
+ }
+ if (constructorIsOk) { return c; }
+ }
+ }
+ Class<?>[] parameterTypes = new Class<?>[parameters.length];
+ for (int i = 0; i < parameters.length; i++) {
+ parameterTypes[i] = parameters[i].getClass();
+ }
+ throw new IllegalArgumentException("Can't get the " + parameters.length +
+ "-argument constructor for parameter(s) "
+ + Arrays.asList(parameters) +
+ " of type(s) " + Arrays.asList(parameterTypes) + " for class "
+ + classOfT.getName() + " (" + classOfT.getClass().getName() + " or " + Arrays.asList(classOfT.getClasses()) + ")" +
+ ", all constructors: " + Arrays.asList(classOfT.getDeclaredConstructors()));
+ }
+
+ /** Instantiate a given class T using given parameters. */
+ static <T> T instantiate(Class<T> classOfT, Object... parameters) {
+ Class<?>[] parameterTypes = new Class<?>[parameters.length];
+ for (int i = 0; i < parameters.length; i++) {
+ parameterTypes[i] = parameters[i].getClass();
+ }
+ Constructor<T> constructor = findConsturctor(classOfT, parameters);
+ boolean constructorIsAccessible = constructor.isAccessible();
+ constructor.setAccessible(true);
+ T result;
+ try {
+ result = constructor.newInstance(parameters);
+ } catch (IllegalArgumentException | InvocationTargetException | InstantiationException | IllegalAccessException e) {
+ throw new IllegalArgumentException("Can't instantiate " + classOfT.getName(), e);
+ }
+ constructor.setAccessible(constructorIsAccessible);
+ return result;
+ }
+
+ static long decodeConstrainedInt(BitBuffer bitqueue, IntRange intRange) {
+ long lowerBound = intRange.minValue();
+ long upperBound = intRange.maxValue();
+ boolean hasExtensionMarker = intRange.hasExtensionMarker();
+ if (upperBound < lowerBound) {
+ throw new IllegalArgumentException("Lower bound " + lowerBound + " is larger that upper bound " + upperBound);
+ }
+ if (hasExtensionMarker) {
+ boolean extensionIsActive = bitqueue.get();
+ if (extensionIsActive) {
+ //in extensions are encoded as uncontraint integers, thius an Asn1BigInteger type should be used(a lower range bound might be applied).
+ throw new UnsupportedOperationException("int extension are not supported yet");
+ }
+ }
+ final Long range = upperBound - lowerBound + 1;
+ if (range == 1) {
+ return lowerBound;
+ }
+ int bitlength = BigInteger.valueOf(range - 1).bitLength();
+ logger.debug(String.format("This int will require %d bits, available %d" , bitlength, bitqueue.remaining()));
+ BitBuffer relevantBits = ByteBitBuffer.allocate( ((bitlength + 7) / 8) * 8); // Full bytes.
+ int numPaddingBits = (8 - (bitlength % 8)) % 8; // Leading padding 0-bits.
+ for (int i = 0; i < numPaddingBits; i++) {
+ relevantBits.put(false);
+ }
+ for (int i = 0; i < bitlength; i++) {
+ relevantBits.put(bitqueue.get());
+ }
+ relevantBits.flip();
+ final BigInteger big = new BigInteger(+1, relevantBits.array());
+ final Long result = lowerBound + big.longValue();
+ logger.debug(String.format("bits %s decoded as %d plus lower bound %d give %d",
+ relevantBits.toBooleanStringFromPosition(0), big.longValue(), lowerBound, result));
+ if ((result < intRange.minValue() || intRange.maxValue() < result)
+ && !intRange.hasExtensionMarker()) {
+ throw new AssertionError("Decoded value "
+ + result + " is outside of range (" + intRange.minValue() + ".."
+ + intRange.maxValue() + ")");
+ }
+ return result;
+ }
+
+
+ //CG Begin
+ static boolean isDefault(Field f, Object obj) {
+
+ if (f.getAnnotation(Asn1Default.class) != null) {
+ String value = f.getAnnotation(Asn1Default.class).value();
+ if (obj.toString().equals(value)){
+ return true;
+ }
+ }
+ return false;
+
+ }
+
+
+ public static boolean isNotAsn1(Field f) {
+ return (f.getAnnotation(NoAsn1Field.class) != null);
+ }
+ //CG End
+
+
+ static boolean hasExtensionMarker(AnnotationStore annotations) {
+ return annotations.getAnnotation(HasExtensionMarker.class) != null;
+ }
+
+ private static boolean isExtension(Field f) {
+ return f.getAnnotation(IsExtension.class) != null;
+ }
+
+ static boolean isMandatory(Field f) {
+ return !isOptional(f);
+ }
+
+ static boolean isOptional(Field f) {
+ //CG elements with default value are treated as optional as they are not encoded in case of the default value
+ if (f.getAnnotation(Asn1Optional.class) != null ||
+ f.getAnnotation(Asn1Default.class) != null) {
+ return true;
+ }
+ return false;
+ }
+
+ static class Asn1ContainerFieldSorter {
+ /** "Outside extension root" */
+ List<Field> extensionFields = new ArrayList<>();
+ List<Field> optionalExtensionFields = new ArrayList<>();
+ List<Field> mandatoryExtensionField = new ArrayList<>();
+ /** "Within extension root" */
+ List<Field> ordinaryFields = new ArrayList<>();
+ List<Field> mandatoryOrdinaryFields = new ArrayList<>();
+ List<Field> optionalOrdinaryFields = new ArrayList<>();
+ List<Field> allFields = new ArrayList<>(); // Excluding test instrumentation.
+
+ Map<Field, Boolean> originalAccess = new HashMap<>();
+
+ Asn1ContainerFieldSorter(Class<?> type) {
+ for (Field f : type.getDeclaredFields()) {
+ if (isTestInstrumentation(f) || isNonAsn1Field(f) ) {
+ continue;
+ }
+ originalAccess.put(f, f.isAccessible());
+ f.setAccessible(true);
+ if (isExtension(f)) {
+ extensionFields.add(f);
+ if (isOptional(f)) {
+ optionalExtensionFields.add(f);
+ } else {
+ mandatoryExtensionField.add(f);
+ }
+ }
+ else {
+ ordinaryFields.add(f);
+ }
+ allFields.add(f);
+ }
+ for (Field f : ordinaryFields) {
+ if (isMandatory(f)) {
+ mandatoryOrdinaryFields.add(f);
+ } else {
+ optionalOrdinaryFields.add(f);
+ }
+ }
+ }
+
+ public void revertAccess() {
+ for (Entry<Field, Boolean> entry : originalAccess.entrySet()) {
+ entry.getKey().setAccessible(entry.getValue());
+ }
+ }
+ }
+
+ static boolean isTestInstrumentation(Field f) {
+ return f.getName().startsWith("$");
+ }
+
+ static boolean isNonAsn1Field(Field f) {
+ if (f.getAnnotation(NoAsn1Field.class) != null) {
+ return true;
+ }
+ return false;
+ }
+
+ static void encodeLengthOfBitmask(BitBuffer bitbuffer, int n) throws Asn1EncodingException {
+ try {
+ if (n <= 63) {
+ logger.debug(String.format("normally small length of bitmask, length %d <= 63 indicated as bit <0>", n));
+ bitbuffer.put(false);
+ encodeConstrainedInt(bitbuffer, n, 1, 63);
+ return;
+ } else {
+ logger.debug(String.format("normally small length of bitmask, length %s > 63 indicated as bit <1>", n));
+ bitbuffer.put(true);
+ encodeLengthDeterminant(bitbuffer, n);
+ return;
+ }
+ } catch (Asn1EncodingException e) {
+ throw new Asn1EncodingException(" length of bitmask ", e);
+ }
+ }
+
+ static void encodeSmallInt(BitBuffer bitbuffer, int n) throws Asn1EncodingException {
+ try {
+ if (n <= 63) {
+ logger.debug(String.format("normally small length of bitmask, length %d <= 63 indicated as bit <0>", n));
+ bitbuffer.put(false);
+ encodeConstrainedInt(bitbuffer, n, 0, 63);
+ return;
+ } else {
+ logger.debug(String.format("normally small length of bitmask, length %s > 63 indicated as bit <1>", n));
+ bitbuffer.put(true);
+ encodeLengthDeterminant(bitbuffer, n);
+ return;
+ }
+ } catch (Asn1EncodingException e) {
+ throw new Asn1EncodingException(" length of bitmask ", e);
+ }
+ }
+
+ static void encodeLengthDeterminant(BitBuffer bitbuffer, int n) throws Asn1EncodingException {
+ try {
+ int position = bitbuffer.position();
+ if (n < 128) {
+ bitbuffer.put(false);
+ encodeConstrainedInt(bitbuffer, n, 0, 127);
+ logger.debug(String.format("Length determinant %d, encoded as <%s>", n, bitbuffer.toBooleanStringFromPosition(position)));
+ if (bitbuffer.position() - position != 8) {
+ throw new AssertionError("length determinant encoded not as 8 bits");
+ }
+ return;
+ } else if (n < NUM_16K) {
+ bitbuffer.put(true);
+ bitbuffer.put(false);
+ encodeConstrainedInt(bitbuffer, n, 0, NUM_16K - 1);
+ logger.debug(String.format("Length determinant %d, encoded as 2bits+14bits: <%s>", n,bitbuffer.toBooleanStringFromPosition(position)));
+ if (bitbuffer.position() - position != 16) {
+ throw new AssertionError("length determinant encoded not as 16 bits");
+ }
+ return;
+ } else {
+ throw new UnsupportedOperationException("Length greater than 16K is not supported yet.");
+ }
+ } catch (Asn1EncodingException e) {
+ throw new Asn1EncodingException(" length determinant ", e);
+ }
+
+ }
+
+ static long decodeLengthOfBitmask(BitBuffer bitbuffer) {
+ logger.debug("decoding length of bitmask");
+ boolean isGreaterThan63 = bitbuffer.get();
+ logger.debug(String.format("length determinant extension preamble size flag: preamble size > 63 is %s", isGreaterThan63));
+ if (!isGreaterThan63) {
+ Long result = decodeConstrainedInt(bitbuffer, newRange(1, 63, false));
+ logger.debug(String.format("normally small length of bitmask, length <= 63, decoded as %d", result));
+ return result;
+ } else {
+ logger.debug(String.format("normally small length of bitmask, length > 63, decoding as ordinary length determinant..."));
+ return decodeLengthDeterminant(bitbuffer);
+ }
+ }
+
+ static long decodeSmallInt(BitBuffer bitbuffer) {
+ logger.debug("decoding small int");
+ boolean isGreaterThan63 = bitbuffer.get();
+ logger.debug(String.format("length determinant extension preamble size flag: preamble size > 63 is %s", isGreaterThan63));
+ if (!isGreaterThan63) {
+ Long result = decodeConstrainedInt(bitbuffer, newRange(0, 63, false));
+ logger.debug(String.format("normally small length of bitmask, length <= 63, decoded as %d", result));
+ return result;
+ } else {
+ logger.debug(String.format("normally small length of bitmask, length > 63, decoding as ordinary length determinant..."));
+ return decodeLengthDeterminant(bitbuffer);
+ }
+ }
+
+ static long decodeLengthDeterminant(BitBuffer bitbuffer) {
+ boolean bit8 = bitbuffer.get();
+ if (!bit8) { // then value is less than 128
+ Long result = decodeConstrainedInt(bitbuffer, newRange(0, 127, false));
+ logger.debug(String.format("length determinant, decoded as %d", result));
+ return result;
+ } else {
+ boolean bit7 = bitbuffer.get();
+ if (!bit7) { // then value is less than 16K
+ Long result = decodeConstrainedInt(bitbuffer, newRange(0, NUM_16K - 1, false));
+ logger.debug(String.format("length determinant, decoded as %d", result));
+ return result;
+ } else { // "Large" n
+ logger.debug("lengthes longer than 16K are not supported yet.");
+ throw new UnsupportedOperationException("lengthes longer than 16K are not supported yet.");
+ }
+ }
+
+ }
+
+ static void encodeConstrainedInt(
+ final BitBuffer bitbuffer,
+ final long value,
+ final long lowerBound,
+ final long upperBound) throws Asn1EncodingException {
+ encodeConstrainedInt(bitbuffer, value, lowerBound, upperBound, false);
+ }
+
+ static void encodeConstrainedInt(
+ final BitBuffer bitbuffer,
+ final long value,
+ final long lowerBound,
+ final long upperBound,
+ final boolean hasExtensionMarker
+ ) throws Asn1EncodingException {
+ if (upperBound < lowerBound) {
+ throw new IllegalArgumentException("Lower bound "
+ + lowerBound + " is larger than upper bound " + upperBound);
+ }
+ if (!hasExtensionMarker && (value < lowerBound || value > upperBound)) {
+ throw new Asn1EncodingException(
+ " Value " + value + " is outside of fixed range " +
+ lowerBound + ".." + upperBound);
+ }
+ final Long range = upperBound - lowerBound + 1;
+ final int position = bitbuffer.position();
+ if (hasExtensionMarker) {
+ boolean outsideOfRange = value < lowerBound || value > upperBound;
+ logger.debug(String.format("constrained int with extension marker, %s extension range",outsideOfRange ? "outside" : "within", outsideOfRange ? "1" : "0"));
+ bitbuffer.put(outsideOfRange);
+ if (outsideOfRange) {
+ throw new UnsupportedOperationException(
+ "INT extensions are not supported yet");
+ }
+ }
+ if (range == 1) {
+ logger.debug("constrained int of empty range, resulting in empty encoding <>");
+ return;
+ }
+ final BigInteger big = BigInteger.valueOf(value - lowerBound);
+ final int numPaddingBits = BigInteger.valueOf(range - 1).bitLength() - big.bitLength();
+ for (int i = 0; i < numPaddingBits; i++) {
+ bitbuffer.put(false);
+ }
+ for (int i = big.bitLength() - 1; i >= 0; i--) {
+ bitbuffer.put(big.testBit(i));
+ }
+ logger.debug(String.format("constrained int %d encoded as <%s>", value, bitbuffer.toBooleanStringFromPosition(position)));
+ return;
+ }
+
+ public static byte[] bytesFromCollection(List<Boolean> bitlist) {
+ int sizeBytes = (bitlist.size() + 7) / 8;
+ byte[] result = new byte[sizeBytes];
+ int byteId = 0;
+ byte bitId = 7;
+ logger.debug(String.format("byte: < %s >", bitlist));
+ for (Boolean b : bitlist) {
+ //logger.debug(String.format("bitId: %s, byteId: %s, value: %s", bitId, byteId, b));
+ result[byteId] |= (b ? 1 : 0) << bitId;
+ bitId--;
+ if (bitId < 0) {
+ bitId = 7;
+ byteId++;
+ }
+ }
+ int nZeros = sizeBytes * 8 - bitlist.size();
+ String zeros = nZeros > 0 ? String.format("%0" + nZeros + "d", 0) : "";
+ logger.debug(String.format("Padding bits (%d): <%s>", nZeros, zeros));
+ return result;
+ }
+
+ final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
+
+ public static String hexStringFromBytes(byte[] bytes) {
+ char[] hexChars = new char[bytes.length * 2];
+ for (int j = 0; j < bytes.length; j++) {
+ int v = bytes[j] & 0xFF;
+ hexChars[j * 2] = hexArray[v >>> 4];
+ hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+ }
+ return new String(hexChars);
+ }
+
+ public static byte[] bytesFromHexString(String s) {
+ int len = s.length();
+ byte[] data = new byte[len / 2];
+ for (int i = 0; i < len; i += 2) {
+ data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ + Character.digit(s.charAt(i + 1), 16));
+ }
+ return data;
+ }
+
+ public static String binaryStringFromBytes(byte[] bytes) {
+ StringBuilder sb = new StringBuilder(bytes.length * Byte.SIZE);
+ for (int i = 0; i < Byte.SIZE * bytes.length; i++)
+ sb.append((bytes[i / Byte.SIZE] << i % Byte.SIZE & 0x80) == 0 ? '0' : '1');
+ return sb.toString();
+ }
+
+ public static byte[] bytesFromBinaryString(String s) {
+ int len = s.length();
+ byte[] result = new byte[(len + Byte.SIZE - 1) / Byte.SIZE];
+ char c;
+ for (int i = 0; i < len; i++)
+ if ((c = s.charAt(i)) == '1') result[i / Byte.SIZE] = (byte) (result[i / Byte.SIZE] | (0x80 >>> (i % Byte.SIZE)));
+ else if (c != '0')
+ throw new IllegalArgumentException();
+ return result;
+ }
+
+ private static BitBuffer bitBufferFromBinaryString(String s) {
+ ByteBitBuffer result = ByteBitBuffer.allocate(s.length());
+ for (int i = 0; i < s.length(); i++) {
+ if (s.charAt(i) != '1' && s.charAt(i) != '0') {
+ throw new IllegalArgumentException("bad character in 'binary' string " + s.charAt(i));
+ }
+ result.put(s.charAt(i) == '1');
+ }
+ result.flip();
+ return result;
+ }
+
+
+
+
+}