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Diffstat (limited to 'core/src/main/java/org/bouncycastle/asn1/ASN1Set.java')
| -rw-r--r-- | core/src/main/java/org/bouncycastle/asn1/ASN1Set.java | 560 |
1 files changed, 0 insertions, 560 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/ASN1Set.java b/core/src/main/java/org/bouncycastle/asn1/ASN1Set.java deleted file mode 100644 index 895f0021..00000000 --- a/core/src/main/java/org/bouncycastle/asn1/ASN1Set.java +++ /dev/null @@ -1,560 +0,0 @@ -package org.bouncycastle.asn1; - -import java.io.ByteArrayOutputStream; -import java.io.IOException; -import java.util.Enumeration; -import java.util.Vector; - -/** - * ASN.1 <code>SET</code> and <code>SET OF</code> constructs. - * <p> - * Note: This does not know which syntax the set is! - * (The difference: ordering of SET elements or not ordering.) - * <p> - * DER form is always definite form length fields, while - * BER support uses indefinite form. - * <p> - * The CER form support does not exist. - * <p> - * <hr> - * <h2>X.690</h2> - * <h3>8: Basic encoding rules</h3> - * <h4>8.11 Encoding of a set value </h4> - * <b>8.11.1</b> The encoding of a set value shall be constructed - * <p> - * <b>8.11.2</b> The contents octets shall consist of the complete - * encoding of a data value from each of the types listed in the - * ASN.1 definition of the set type, in an order chosen by the sender, - * unless the type was referenced with the keyword - * <b>OPTIONAL</b> or the keyword <b>DEFAULT</b>. - * <p> - * <b>8.11.3</b> The encoding of a data value may, but need not, - * be present for a type which was referenced with the keyword - * <b>OPTIONAL</b> or the keyword <b>DEFAULT</b>. - * <blockquote> - * NOTE — The order of data values in a set value is not significant, - * and places no constraints on the order during transfer - * </blockquote> - * <h4>8.12 Encoding of a set-of value</h4> - * <b>8.12.1</b> The encoding of a set-of value shall be constructed. - * <p> - * <b>8.12.2</b> The text of 8.10.2 applies: - * <i>The contents octets shall consist of zero, - * one or more complete encodings of data values from the type listed in - * the ASN.1 definition.</i> - * <p> - * <b>8.12.3</b> The order of data values need not be preserved by - * the encoding and subsequent decoding. - * - * <h3>9: Canonical encoding rules</h3> - * <h4>9.1 Length forms</h4> - * If the encoding is constructed, it shall employ the indefinite length form. - * If the encoding is primitive, it shall include the fewest length octets necessary. - * [Contrast with 8.1.3.2 b).] - * <h4>9.3 Set components</h4> - * The encodings of the component values of a set value shall - * appear in an order determined by their tags as specified - * in 8.6 of ITU-T Rec. X.680 | ISO/IEC 8824-1. - * Additionally, for the purposes of determining the order in which - * components are encoded when one or more component is an untagged - * choice type, each untagged choice type is ordered as though it - * has a tag equal to that of the smallest tag in that choice type - * or any untagged choice types nested within. - * - * <h3>10: Distinguished encoding rules</h3> - * <h4>10.1 Length forms</h4> - * The definite form of length encoding shall be used, - * encoded in the minimum number of octets. - * [Contrast with 8.1.3.2 b).] - * <h4>10.3 Set components</h4> - * The encodings of the component values of a set value shall appear - * in an order determined by their tags as specified - * in 8.6 of ITU-T Rec. X.680 | ISO/IEC 8824-1. - * <blockquote> - * NOTE — Where a component of the set is an untagged choice type, - * the location of that component in the ordering will depend on - * the tag of the choice component being encoded. - * </blockquote> - * - * <h3>11: Restrictions on BER employed by both CER and DER</h3> - * <h4>11.5 Set and sequence components with default value </h4> - * The encoding of a set value or sequence value shall not include - * an encoding for any component value which is equal to - * its default value. - * <h4>11.6 Set-of components </h4> - * <p> - * The encodings of the component values of a set-of value - * shall appear in ascending order, the encodings being compared - * as octet strings with the shorter components being padded at - * their trailing end with 0-octets. - * <blockquote> - * NOTE — The padding octets are for comparison purposes only - * and do not appear in the encodings. - * </blockquote> - */ -public abstract class ASN1Set - extends ASN1Primitive -{ - private Vector set = new Vector(); - private boolean isSorted = false; - - /** - * return an ASN1Set from the given object. - * - * @param obj the object we want converted. - * @exception IllegalArgumentException if the object cannot be converted. - * @return an ASN1Set instance, or null. - */ - public static ASN1Set getInstance( - Object obj) - { - if (obj == null || obj instanceof ASN1Set) - { - return (ASN1Set)obj; - } - else if (obj instanceof ASN1SetParser) - { - return ASN1Set.getInstance(((ASN1SetParser)obj).toASN1Primitive()); - } - else if (obj instanceof byte[]) - { - try - { - return ASN1Set.getInstance(ASN1Primitive.fromByteArray((byte[])obj)); - } - catch (IOException e) - { - throw new IllegalArgumentException("failed to construct set from byte[]: " + e.getMessage()); - } - } - else if (obj instanceof ASN1Encodable) - { - ASN1Primitive primitive = ((ASN1Encodable)obj).toASN1Primitive(); - - if (primitive instanceof ASN1Set) - { - return (ASN1Set)primitive; - } - } - - throw new IllegalArgumentException("unknown object in getInstance: " + obj.getClass().getName()); - } - - /** - * Return an ASN1 set from a tagged object. There is a special - * case here, if an object appears to have been explicitly tagged on - * reading but we were expecting it to be implicitly tagged in the - * normal course of events it indicates that we lost the surrounding - * set - so we need to add it back (this will happen if the tagged - * object is a sequence that contains other sequences). If you are - * dealing with implicitly tagged sets you really <b>should</b> - * be using this method. - * - * @param obj the tagged object. - * @param explicit true if the object is meant to be explicitly tagged - * false otherwise. - * @exception IllegalArgumentException if the tagged object cannot - * be converted. - * @return an ASN1Set instance. - */ - public static ASN1Set getInstance( - ASN1TaggedObject obj, - boolean explicit) - { - if (explicit) - { - if (!obj.isExplicit()) - { - throw new IllegalArgumentException("object implicit - explicit expected."); - } - - return (ASN1Set)obj.getObject(); - } - else - { - // - // constructed object which appears to be explicitly tagged - // and it's really implicit means we have to add the - // surrounding set. - // - if (obj.isExplicit()) - { - if (obj instanceof BERTaggedObject) - { - return new BERSet(obj.getObject()); - } - else - { - return new DLSet(obj.getObject()); - } - } - else - { - if (obj.getObject() instanceof ASN1Set) - { - return (ASN1Set)obj.getObject(); - } - - // - // in this case the parser returns a sequence, convert it - // into a set. - // - if (obj.getObject() instanceof ASN1Sequence) - { - ASN1Sequence s = (ASN1Sequence)obj.getObject(); - - if (obj instanceof BERTaggedObject) - { - return new BERSet(s.toArray()); - } - else - { - return new DLSet(s.toArray()); - } - } - } - } - - throw new IllegalArgumentException("unknown object in getInstance: " + obj.getClass().getName()); - } - - protected ASN1Set() - { - } - - /** - * create a sequence containing one object - * @param obj object to be added to the SET. - */ - protected ASN1Set( - ASN1Encodable obj) - { - set.addElement(obj); - } - - /** - * create a sequence containing a vector of objects. - * @param v a vector of objects to make up the SET. - * @param doSort true if should be sorted DER style, false otherwise. - */ - protected ASN1Set( - ASN1EncodableVector v, - boolean doSort) - { - for (int i = 0; i != v.size(); i++) - { - set.addElement(v.get(i)); - } - - if (doSort) - { - this.sort(); - } - } - - /** - * create a sequence containing a vector of objects. - */ - protected ASN1Set( - ASN1Encodable[] array, - boolean doSort) - { - for (int i = 0; i != array.length; i++) - { - set.addElement(array[i]); - } - - if (doSort) - { - this.sort(); - } - } - - public Enumeration getObjects() - { - return set.elements(); - } - - /** - * return the object at the set position indicated by index. - * - * @param index the set number (starting at zero) of the object - * @return the object at the set position indicated by index. - */ - public ASN1Encodable getObjectAt( - int index) - { - return (ASN1Encodable)set.elementAt(index); - } - - /** - * return the number of objects in this set. - * - * @return the number of objects in this set. - */ - public int size() - { - return set.size(); - } - - public ASN1Encodable[] toArray() - { - ASN1Encodable[] values = new ASN1Encodable[this.size()]; - - for (int i = 0; i != this.size(); i++) - { - values[i] = this.getObjectAt(i); - } - - return values; - } - - public ASN1SetParser parser() - { - final ASN1Set outer = this; - - return new ASN1SetParser() - { - private final int max = size(); - - private int index; - - public ASN1Encodable readObject() throws IOException - { - if (index == max) - { - return null; - } - - ASN1Encodable obj = getObjectAt(index++); - if (obj instanceof ASN1Sequence) - { - return ((ASN1Sequence)obj).parser(); - } - if (obj instanceof ASN1Set) - { - return ((ASN1Set)obj).parser(); - } - - return obj; - } - - public ASN1Primitive getLoadedObject() - { - return outer; - } - - public ASN1Primitive toASN1Primitive() - { - return outer; - } - }; - } - - public int hashCode() - { - Enumeration e = this.getObjects(); - int hashCode = size(); - - while (e.hasMoreElements()) - { - Object o = getNext(e); - hashCode *= 17; - - hashCode ^= o.hashCode(); - } - - return hashCode; - } - - /** - * Change current SET object to be encoded as {@link DERSet}. - * This is part of Distinguished Encoding Rules form serialization. - */ - ASN1Primitive toDERObject() - { - if (isSorted) - { - ASN1Set derSet = new DERSet(); - - derSet.set = this.set; - - return derSet; - } - else - { - Vector v = new Vector(); - - for (int i = 0; i != set.size(); i++) - { - v.addElement(set.elementAt(i)); - } - - ASN1Set derSet = new DERSet(); - - derSet.set = v; - - derSet.sort(); - - return derSet; - } - } - - /** - * Change current SET object to be encoded as {@link DLSet}. - * This is part of Direct Length form serialization. - */ - ASN1Primitive toDLObject() - { - ASN1Set derSet = new DLSet(); - - derSet.set = this.set; - - return derSet; - } - - boolean asn1Equals( - ASN1Primitive o) - { - if (!(o instanceof ASN1Set)) - { - return false; - } - - ASN1Set other = (ASN1Set)o; - - if (this.size() != other.size()) - { - return false; - } - - Enumeration s1 = this.getObjects(); - Enumeration s2 = other.getObjects(); - - while (s1.hasMoreElements()) - { - ASN1Encodable obj1 = getNext(s1); - ASN1Encodable obj2 = getNext(s2); - - ASN1Primitive o1 = obj1.toASN1Primitive(); - ASN1Primitive o2 = obj2.toASN1Primitive(); - - if (o1 == o2 || o1.equals(o2)) - { - continue; - } - - return false; - } - - return true; - } - - private ASN1Encodable getNext(Enumeration e) - { - ASN1Encodable encObj = (ASN1Encodable)e.nextElement(); - - // unfortunately null was allowed as a substitute for DER null - if (encObj == null) - { - return DERNull.INSTANCE; - } - - return encObj; - } - - /** - * return true if a <= b (arrays are assumed padded with zeros). - */ - private boolean lessThanOrEqual( - byte[] a, - byte[] b) - { - int len = Math.min(a.length, b.length); - for (int i = 0; i != len; ++i) - { - if (a[i] != b[i]) - { - return (a[i] & 0xff) < (b[i] & 0xff); - } - } - return len == a.length; - } - - private byte[] getEncoded( - ASN1Encodable obj) - { - ByteArrayOutputStream bOut = new ByteArrayOutputStream(); - ASN1OutputStream aOut = new ASN1OutputStream(bOut); - - try - { - aOut.writeObject(obj); - } - catch (IOException e) - { - throw new IllegalArgumentException("cannot encode object added to SET"); - } - - return bOut.toByteArray(); - } - - protected void sort() - { - if (!isSorted) - { - isSorted = true; - if (set.size() > 1) - { - boolean swapped = true; - int lastSwap = set.size() - 1; - - while (swapped) - { - int index = 0; - int swapIndex = 0; - byte[] a = getEncoded((ASN1Encodable)set.elementAt(0)); - - swapped = false; - - while (index != lastSwap) - { - byte[] b = getEncoded((ASN1Encodable)set.elementAt(index + 1)); - - if (lessThanOrEqual(a, b)) - { - a = b; - } - else - { - Object o = set.elementAt(index); - - set.setElementAt(set.elementAt(index + 1), index); - set.setElementAt(o, index + 1); - - swapped = true; - swapIndex = index; - } - - index++; - } - - lastSwap = swapIndex; - } - } - } - } - - boolean isConstructed() - { - return true; - } - - abstract void encode(ASN1OutputStream out) - throws IOException; - - public String toString() - { - return set.toString(); - } -} |