diff options
Diffstat (limited to 'core/src/main/java/org/spongycastle/asn1/DERUTF8String.java')
-rw-r--r-- | core/src/main/java/org/spongycastle/asn1/DERUTF8String.java | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/DERUTF8String.java b/core/src/main/java/org/spongycastle/asn1/DERUTF8String.java new file mode 100644 index 00000000..6bb235d8 --- /dev/null +++ b/core/src/main/java/org/spongycastle/asn1/DERUTF8String.java @@ -0,0 +1,135 @@ +package org.spongycastle.asn1; + +import java.io.IOException; + +import org.spongycastle.util.Arrays; +import org.spongycastle.util.Strings; + +/** + * DER UTF8String object. + */ +public class DERUTF8String + extends ASN1Primitive + implements ASN1String +{ + private byte[] string; + + /** + * Return an UTF8 string from the passed in object. + * + * @param obj a DERUTF8String or an object that can be converted into one. + * @exception IllegalArgumentException + * if the object cannot be converted. + * @return a DERUTF8String instance, or null + */ + public static DERUTF8String getInstance(Object obj) + { + if (obj == null || obj instanceof DERUTF8String) + { + return (DERUTF8String)obj; + } + + if (obj instanceof byte[]) + { + try + { + return (DERUTF8String)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 UTF8 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 DERUTF8String instance, or null + */ + public static DERUTF8String getInstance( + ASN1TaggedObject obj, + boolean explicit) + { + ASN1Primitive o = obj.getObject(); + + if (explicit || o instanceof DERUTF8String) + { + return getInstance(o); + } + else + { + return new DERUTF8String(ASN1OctetString.getInstance(o).getOctets()); + } + } + + /** + * Basic constructor - byte encoded string. + */ + DERUTF8String(byte[] string) + { + this.string = string; + } + + /** + * Basic constructor + */ + public DERUTF8String(String string) + { + this.string = Strings.toUTF8ByteArray(string); + } + + public String getString() + { + return Strings.fromUTF8ByteArray(string); + } + + public String toString() + { + return getString(); + } + + public int hashCode() + { + return Arrays.hashCode(string); + } + + boolean asn1Equals(ASN1Primitive o) + { + if (!(o instanceof DERUTF8String)) + { + return false; + } + + DERUTF8String s = (DERUTF8String)o; + + return Arrays.areEqual(string, s.string); + } + + boolean isConstructed() + { + return false; + } + + int encodedLength() + throws IOException + { + return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; + } + + void encode(ASN1OutputStream out) + throws IOException + { + out.writeEncoded(BERTags.UTF8_STRING, string); + } +} |