| package org.bouncycastle.asn1; |
| |
| import java.io.IOException; |
| |
| import org.bouncycastle.util.Arrays; |
| import org.bouncycastle.util.Strings; |
| |
| /** |
| * DER PrintableString object. |
| */ |
| public class DERPrintableString |
| extends ASN1Primitive |
| implements ASN1String |
| { |
| private final byte[] string; |
| |
| /** |
| * return a printable string from the passed in object. |
| * |
| * @param obj a DERPrintableString or an object that can be converted into one. |
| * @exception IllegalArgumentException if the object cannot be converted. |
| * @return a DERPrintableString instance, or null. |
| */ |
| public static DERPrintableString getInstance( |
| Object obj) |
| { |
| if (obj == null || obj instanceof DERPrintableString) |
| { |
| return (DERPrintableString)obj; |
| } |
| |
| if (obj instanceof byte[]) |
| { |
| try |
| { |
| return (DERPrintableString)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 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. |
| * @return a DERPrintableString instance, or null. |
| */ |
| public static DERPrintableString getInstance( |
| ASN1TaggedObject obj, |
| boolean explicit) |
| { |
| ASN1Primitive o = obj.getObject(); |
| |
| if (explicit || o instanceof DERPrintableString) |
| { |
| return getInstance(o); |
| } |
| else |
| { |
| return new DERPrintableString(ASN1OctetString.getInstance(o).getOctets()); |
| } |
| } |
| |
| /** |
| * basic constructor - byte encoded string. |
| */ |
| DERPrintableString( |
| byte[] string) |
| { |
| this.string = string; |
| } |
| |
| /** |
| * 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 = Strings.toByteArray(string); |
| } |
| |
| public String getString() |
| { |
| return Strings.fromByteArray(string); |
| } |
| |
| public byte[] getOctets() |
| { |
| return Arrays.clone(string); |
| } |
| |
| boolean isConstructed() |
| { |
| return false; |
| } |
| |
| int encodedLength() |
| { |
| return 1 + StreamUtil.calculateBodyLength(string.length) + string.length; |
| } |
| |
| void encode( |
| ASN1OutputStream out) |
| throws IOException |
| { |
| out.writeEncoded(BERTags.PRINTABLE_STRING, string); |
| } |
| |
| public int hashCode() |
| { |
| return Arrays.hashCode(string); |
| } |
| |
| boolean asn1Equals( |
| ASN1Primitive o) |
| { |
| if (!(o instanceof DERPrintableString)) |
| { |
| return false; |
| } |
| |
| DERPrintableString s = (DERPrintableString)o; |
| |
| return Arrays.areEqual(string, s.string); |
| } |
| |
| public String toString() |
| { |
| return getString(); |
| } |
| |
| /** |
| * 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; |
| } |
| } |