| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| |
| /** |
| * Public facade of ASN.1 Boolean data. |
| * <p> |
| * Use following to place a new instance of ASN.1 Boolean in your dataset: |
| * </p> |
| * <ul> |
| * <li> ASN1Boolean.TRUE literal</li> |
| * <li> ASN1Boolean.FALSE literal</li> |
| * <li> {@link ASN1Boolean#getInstance(boolean) ASN1Boolean.getInstance(boolean)}</li> |
| * <li> {@link ASN1Boolean#getInstance(int) ASN1Boolean.getInstance(int)}</li> |
| * </ul> |
| * </p> |
| */ |
| public class ASN1Boolean |
| extends ASN1Primitive |
| { |
| private static final byte[] TRUE_VALUE = new byte[] { (byte)0xff }; |
| private static final byte[] FALSE_VALUE = new byte[] { 0 }; |
| |
| // BEGIN android-changed |
| final private byte[] value; |
| // END android-changed |
| |
| public static final ASN1Boolean FALSE = new ASN1Boolean(false); |
| public static final ASN1Boolean TRUE = new ASN1Boolean(true); |
| |
| /** |
| * return a boolean from the passed in object. |
| * |
| * @param obj an ASN1Boolean or an object that can be converted into one. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| * @return an ASN1Boolean instance. |
| */ |
| public static ASN1Boolean getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof ASN1Boolean) |
| { |
| return (ASN1Boolean)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| byte[] enc = (byte[])obj; |
| try |
| { |
| return (ASN1Boolean)fromByteArray(enc); |
| } |
| catch (IOException e) |
| { |
| throw new IllegalArgumentException("failed to construct boolean from byte[]: " + e.getMessage()); |
| } |
| } |
| |
| throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); |
| } |
| |
| /** |
| * return an ASN1Boolean from the passed in boolean. |
| * @return an ASN1Boolean instance. |
| */ |
| public static ASN1Boolean getInstance( |
| boolean value) |
| { |
| return (value ? TRUE : FALSE); |
| } |
| |
| /** |
| * return an ASN1Boolean from the passed in value. |
| * @return an ASN1Boolean instance. |
| */ |
| public static ASN1Boolean getInstance( |
| int value) |
| { |
| return (value != 0 ? TRUE : FALSE); |
| } |
| |
| // BEGIN android-added |
| /** |
| * return a ASN1Boolean from the passed in array. |
| */ |
| public static ASN1Boolean getInstance( |
| byte[] octets) |
| { |
| return (octets[0] != 0) ? TRUE : FALSE; |
| } |
| |
| // END android-added |
| /** |
| * return a Boolean from a tagged object. |
| * |
| * @param obj the tagged object holding the object we want |
| * @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 ASN1Boolean instance. |
| */ |
| public static ASN1Boolean getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof ASN1Boolean) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return ASN1Boolean.fromOctetString(((ASN1OctetString)o).getOctets()); |
| } |
| } |
| |
| // BEGIN android-changed |
| protected ASN1Boolean( |
| // END android-changed |
| byte[] value) |
| { |
| if (value.length != 1) |
| { |
| throw new IllegalArgumentException("byte value should have 1 byte in it"); |
| } |
| |
| if (value[0] == 0) |
| { |
| this.value = FALSE_VALUE; |
| } |
| else if ((value[0] & 0xff) == 0xff) |
| { |
| this.value = TRUE_VALUE; |
| } |
| else |
| { |
| this.value = Arrays.clone(value); |
| } |
| } |
| |
| /** |
| * @deprecated use getInstance(boolean) method. |
| * @param value true or false. |
| */ |
| // BEGIN android-changed |
| protected ASN1Boolean( |
| boolean value) |
| // END android-changed |
| { |
| this.value = (value) ? TRUE_VALUE : FALSE_VALUE; |
| } |
| |
| public boolean isTrue() |
| { |
| return (value[0] != 0); |
| } |
| |
| boolean isConstructed() |
| { |
| return false; |
| } |
| |
| int encodedLength() |
| { |
| return 3; |
| } |
| |
| void encode( |
| ASN1OutputStream out) |
| throws IOException |
| { |
| out.writeEncoded(BERTags.BOOLEAN, value); |
| } |
| |
| protected boolean asn1Equals( |
| ASN1Primitive o) |
| { |
| if (o instanceof ASN1Boolean) |
| { |
| return (value[0] == ((ASN1Boolean)o).value[0]); |
| } |
| |
| return false; |
| } |
| |
| public int hashCode() |
| { |
| return value[0]; |
| } |
| |
| |
| public String toString() |
| { |
| return (value[0] != 0) ? "TRUE" : "FALSE"; |
| } |
| |
| static ASN1Boolean fromOctetString(byte[] value) |
| { |
| if (value.length != 1) |
| { |
| throw new IllegalArgumentException("BOOLEAN value should have 1 byte in it"); |
| } |
| |
| if (value[0] == 0) |
| { |
| return FALSE; |
| } |
| else if ((value[0] & 0xff) == 0xff) |
| { |
| return TRUE; |
| } |
| else |
| { |
| return new ASN1Boolean(value); |
| } |
| } |
| } |