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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.asn1;

import java.io.IOException;

import org.bouncycastle.util.Arrays;
import org.bouncycastle.util.Strings;

/**
 * NumericString object - this is an ascii string of characters {0,1,2,3,4,5,6,7,8,9, }.
 * ASN.1 NUMERIC-STRING object.
 * 

* This is an ASCII string of characters {0,1,2,3,4,5,6,7,8,9} + space. *

* See X.680 section 37.2. *

* Explicit character set escape sequences are not allowed. */ public abstract class ASN1NumericString extends ASN1Primitive implements ASN1String { static final ASN1UniversalType TYPE = new ASN1UniversalType(ASN1NumericString.class, BERTags.NUMERIC_STRING) { ASN1Primitive fromImplicitPrimitive(DEROctetString octetString) { return createPrimitive(octetString.getOctets()); } }; /** * Return a Numeric string from the passed in object * * @param obj an ASN1NumericString or an object that can be converted into one. * @exception IllegalArgumentException if the object cannot be converted. * @return an ASN1NumericString instance, or null */ public static ASN1NumericString getInstance(Object obj) { if (obj == null || obj instanceof ASN1NumericString) { return (ASN1NumericString)obj; } if (obj instanceof ASN1Encodable) { ASN1Primitive primitive = ((ASN1Encodable)obj).toASN1Primitive(); if (primitive instanceof ASN1NumericString) { return (ASN1NumericString)primitive; } } if (obj instanceof byte[]) { try { return (ASN1NumericString)TYPE.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 Numeric String from a tagged object. * * @param taggedObject 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 ASN1NumericString instance, or null. */ public static ASN1NumericString getInstance(ASN1TaggedObject taggedObject, boolean explicit) { return (ASN1NumericString)TYPE.getContextInstance(taggedObject, explicit); } final byte[] contents; /** * 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 NumericString. */ ASN1NumericString(String string, boolean validate) { if (validate && !isNumericString(string)) { throw new IllegalArgumentException("string contains illegal characters"); } this.contents = Strings.toByteArray(string); } ASN1NumericString(byte[] contents, boolean clone) { this.contents = clone ? Arrays.clone(contents) : contents; } public final String getString() { return Strings.fromByteArray(contents); } public String toString() { return getString(); } public final byte[] getOctets() { return Arrays.clone(contents); } final boolean encodeConstructed() { return false; } final int encodedLength(boolean withTag) { return ASN1OutputStream.getLengthOfEncodingDL(withTag, contents.length); } final void encode(ASN1OutputStream out, boolean withTag) throws IOException { out.writeEncodingDL(withTag, BERTags.NUMERIC_STRING, contents); } public final int hashCode() { return Arrays.hashCode(contents); } final boolean asn1Equals(ASN1Primitive other) { if (!(other instanceof ASN1NumericString)) { return false; } ASN1NumericString that = (ASN1NumericString)other; return Arrays.areEqual(this.contents, that.contents); } /** * Return true if the string can be represented as a NumericString ('0'..'9', ' ') * * @param str string to validate. * @return true if numeric, false otherwise. */ public static boolean isNumericString(String str) { for (int i = str.length() - 1; i >= 0; i--) { char ch = str.charAt(i); if (ch > 0x007f) { return false; } if (('0' <= ch && ch <= '9') || ch == ' ') { continue; } return false; } return true; } static boolean isNumericString(byte[] contents) { for (int i = 0; i < contents.length; ++i) { switch (contents[i]) { case 0x20: case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: break; default: return false; } } return true; } static ASN1NumericString createPrimitive(byte[] contents) { // TODO Validation - sort out exception types // if (!isNumericString(contents)) return new DERNumericString(contents, false); } }





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