diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/DERT61String.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/DERT61String.java | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/DERT61String.java b/core/src/main/java/org/spongycastle/asn1/DERT61String.java new file mode 100644 index 00000000..bdcff1d2 --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/DERT61String.java @@ -0,0 +1,151 @@ +package org.spongycastle.asn1; + +import java.io.IOException; + +import org.spongycastle.util.Arrays; +import org.spongycastle.util.Strings; + +/** + * DER T61String (also the teletex string), try not to use this if you don't need to. The standard support the encoding for + * this has been withdrawn. + */ +public class DERT61String + extends ASN1Primitive + implements ASN1String +{ + private byte[] string; + + /** + * return a T61 string from the passed in object. + * + * @param obj a DERT61String or an object that can be converted into one. + * @exception IllegalArgumentException if the object cannot be converted. + * @return a DERT61String instance, or null + */ + public static DERT61String getInstance( + Object obj) + { + if (obj == null || obj instanceof DERT61String) + { + return (DERT61String)obj; + } + + if (obj instanceof byte[]) + { + try + { + return (DERT61String)fromByteArray((byte[])obj); + } + catch (Exception e) + { + throw new IllegalArgumentException("encoding error in getInstance: " + e.toString()); + } + } + + throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); + } + + /** + * return an T61 String 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 a DERT61String instance, or null + */ + public static DERT61String getInstance( + ASN1TaggedObject obj, + boolean explicit) + { + ASN1Primitive o = obj.getObject(); + + if (explicit || o instanceof DERT61String) + { + return getInstance(o); + } + else + { + return new DERT61String(ASN1OctetString.getInstance(o).getOctets()); + } + } + + /** + * basic constructor - string encoded as a sequence of bytes. + * + * @param string the byte encoding of the string to be wrapped. + */ + public DERT61String( + byte[] string) + { + this.string = string; + } + + /** + * basic constructor - with string 8 bit assumed. + * + * @param string the string to be wrapped. + */ + public DERT61String( + String string) + { + this(Strings.toByteArray(string)); + } + + /** + * Decode the encoded string and return it, 8 bit encoding assumed. + * @return the decoded String + */ + public String getString() + { + return Strings.fromByteArray(string); + } + + public String toString() + { + return getString(); + } + + boolean isConstructed() + { + return false; + } + + int encodedLength() + { + return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; + } + + void encode( + ASN1OutputStream out) + throws IOException + { + out.writeEncoded(BERTags.T61_STRING, string); + } + + /** + * Return the encoded string as a byte array. + * @return the actual bytes making up the encoded body of the T61 string. + */ + public byte[] getOctets() + { + return Arrays.clone(string); + } + + boolean asn1Equals( + ASN1Primitive o) + { + if (!(o instanceof DERT61String)) + { + return false; + } + + return Arrays.areEqual(string, ((DERT61String)o).string); + } + + public int hashCode() + { + return Arrays.hashCode(string); + } +} |