package com.google.bitcoin.bouncycastle.asn1; import java.io.IOException; /** * DER PrintableString object. */ public class DERPrintableString extends ASN1Object implements DERString { String string; /** * return a printable string from the passed in object. * * @exception IllegalArgumentException if the object cannot be converted. */ public static DERPrintableString getInstance( Object obj) { if (obj == null || obj instanceof DERPrintableString) { return (DERPrintableString)obj; } if (obj instanceof ASN1OctetString) { return new DERPrintableString(((ASN1OctetString)obj).getOctets()); } if (obj instanceof ASN1TaggedObject) { return getInstance(((ASN1TaggedObject)obj).getObject()); } throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName()); } /** * return a Printable 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. */ public static DERPrintableString getInstance( ASN1TaggedObject obj, boolean explicit) { return getInstance(obj.getObject()); } /** * basic constructor - byte encoded string. */ public DERPrintableString( byte[] string) { char[] cs = new char[string.length]; for (int i = 0; i != cs.length; i++) { cs[i] = (char)(string[i] & 0xff); } this.string = new String(cs); } /** * basic constructor - this does not validate the string */ public DERPrintableString( String string) { this(string, false); } /** * Constructor with optional validation. * * @param string the base string to wrap. * @param validate whether or not to check the string. * @throws IllegalArgumentException if validate is true and the string * contains characters that should not be in a PrintableString. */ public DERPrintableString( String string, boolean validate) { if (validate && !isPrintableString(string)) { throw new IllegalArgumentException("string contains illegal characters"); } this.string = string; } public String getString() { return string; } public byte[] getOctets() { char[] cs = string.toCharArray(); byte[] bs = new byte[cs.length]; for (int i = 0; i != cs.length; i++) { bs[i] = (byte)cs[i]; } return bs; } void encode( DEROutputStream out) throws IOException { out.writeEncoded(PRINTABLE_STRING, this.getOctets()); } public int hashCode() { return this.getString().hashCode(); } boolean asn1Equals( DERObject o) { if (!(o instanceof DERPrintableString)) { return false; } DERPrintableString s = (DERPrintableString)o; return this.getString().equals(s.getString()); } public String toString() { return string; } /** * return true if the passed in String can be represented without * loss as a PrintableString, false otherwise. * * @return true if in printable set, false otherwise. */ public static boolean isPrintableString( String str) { for (int i = str.length() - 1; i >= 0; i--) { char ch = str.charAt(i); if (ch > 0x007f) { return false; } if ('a' <= ch && ch <= 'z') { continue; } if ('A' <= ch && ch <= 'Z') { continue; } if ('0' <= ch && ch <= '9') { continue; } switch (ch) { case ' ': case '\'': case '(': case ')': case '+': case '-': case '.': case ':': case '=': case '?': case '/': case ',': continue; } return false; } return true; } }