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The AVA.java Java example source code
/*
* Copyright (c) 1996, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.security.x509;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Reader;
import java.security.AccessController;
import java.text.Normalizer;
import java.util.*;
import sun.security.action.GetBooleanAction;
import sun.security.util.*;
import sun.security.pkcs.PKCS9Attribute;
/**
* X.500 Attribute-Value-Assertion (AVA): an attribute, as identified by
* some attribute ID, has some particular value. Values are as a rule ASN.1
* printable strings. A conventional set of type IDs is recognized when
* parsing (and generating) RFC 1779, 2253 or 4514 syntax strings.
*
* <P>AVAs are components of X.500 relative names. Think of them as being
* individual fields of a database record. The attribute ID is how you
* identify the field, and the value is part of a particular record.
* <p>
* Note that instances of this class are immutable.
*
* @see X500Name
* @see RDN
*
*
* @author David Brownell
* @author Amit Kapoor
* @author Hemma Prafullchandra
*/
public class AVA implements DerEncoder {
private static final Debug debug = Debug.getInstance("x509", "\t[AVA]");
// See CR 6391482: if enabled this flag preserves the old but incorrect
// PrintableString encoding for DomainComponent. It may need to be set to
// avoid breaking preexisting certificates generated with sun.security APIs.
private static final boolean PRESERVE_OLD_DC_ENCODING =
AccessController.doPrivileged(new GetBooleanAction
("com.sun.security.preserveOldDCEncoding"));
/**
* DEFAULT format allows both RFC1779 and RFC2253 syntax and
* additional keywords.
*/
final static int DEFAULT = 1;
/**
* RFC1779 specifies format according to RFC1779.
*/
final static int RFC1779 = 2;
/**
* RFC2253 specifies format according to RFC2253.
*/
final static int RFC2253 = 3;
// currently not private, accessed directly from RDN
final ObjectIdentifier oid;
final DerValue value;
/*
* If the value has any of these characters in it, it must be quoted.
* Backslash and quote characters must also be individually escaped.
* Leading and trailing spaces, also multiple internal spaces, also
* call for quoting the whole string.
*/
private static final String specialChars1779 = ",=\n+<>#;\\\"";
/*
* In RFC2253, if the value has any of these characters in it, it
* must be quoted by a preceding \.
*/
private static final String specialChars2253 = ",=+<>#;\\\"";
/*
* includes special chars from RFC1779 and RFC2253, as well as ' ' from
* RFC 4514.
*/
private static final String specialCharsDefault = ",=\n+<>#;\\\" ";
private static final String escapedDefault = ",+<>;\"";
/*
* Values that aren't printable strings are emitted as BER-encoded
* hex data.
*/
private static final String hexDigits = "0123456789ABCDEF";
public AVA(ObjectIdentifier type, DerValue val) {
if ((type == null) || (val == null)) {
throw new NullPointerException();
}
oid = type;
value = val;
}
/**
* Parse an RFC 1779, 2253 or 4514 style AVA string: CN=fee fie foe fum
* or perhaps with quotes. Not all defined AVA tags are supported;
* of current note are X.400 related ones (PRMD, ADMD, etc).
*
* This terminates at unescaped AVA separators ("+") or RDN
* separators (",", ";"), and removes cosmetic whitespace at the end of
* values.
*/
AVA(Reader in) throws IOException {
this(in, DEFAULT);
}
/**
* Parse an RFC 1779, 2253 or 4514 style AVA string: CN=fee fie foe fum
* or perhaps with quotes. Additional keywords can be specified in the
* keyword/OID map.
*
* This terminates at unescaped AVA separators ("+") or RDN
* separators (",", ";"), and removes cosmetic whitespace at the end of
* values.
*/
AVA(Reader in, Map<String, String> keywordMap) throws IOException {
this(in, DEFAULT, keywordMap);
}
/**
* Parse an AVA string formatted according to format.
*/
AVA(Reader in, int format) throws IOException {
this(in, format, Collections.<String, String>emptyMap());
}
/**
* Parse an AVA string formatted according to format.
*
* @param in Reader containing AVA String
* @param format parsing format
* @param keywordMap a Map where a keyword String maps to a corresponding
* OID String. Each AVA keyword will be mapped to the corresponding OID.
* If an entry does not exist, it will fallback to the builtin
* keyword/OID mapping.
* @throws IOException if the AVA String is not valid in the specified
* format or an OID String from the keywordMap is improperly formatted
*/
AVA(Reader in, int format, Map<String, String> keywordMap)
throws IOException {
// assume format is one of DEFAULT or RFC2253
StringBuilder temp = new StringBuilder();
int c;
/*
* First get the keyword indicating the attribute's type,
* and map it to the appropriate OID.
*/
while (true) {
c = readChar(in, "Incorrect AVA format");
if (c == '=') {
break;
}
temp.append((char)c);
}
oid = AVAKeyword.getOID(temp.toString(), format, keywordMap);
/*
* Now parse the value. "#hex", a quoted string, or a string
* terminated by "+", ",", ";". Whitespace before or after
* the value is stripped away unless format is RFC2253.
*/
temp.setLength(0);
if (format == RFC2253) {
// read next character
c = in.read();
if (c == ' ') {
throw new IOException("Incorrect AVA RFC2253 format - " +
"leading space must be escaped");
}
} else {
// read next character skipping whitespace
do {
c = in.read();
} while ((c == ' ') || (c == '\n'));
}
if (c == -1) {
// empty value
value = new DerValue("");
return;
}
if (c == '#') {
value = parseHexString(in, format);
} else if ((c == '"') && (format != RFC2253)) {
value = parseQuotedString(in, temp);
} else {
value = parseString(in, c, format, temp);
}
}
/**
* Get the ObjectIdentifier of this AVA.
*/
public ObjectIdentifier getObjectIdentifier() {
return oid;
}
/**
* Get the value of this AVA as a DerValue.
*/
public DerValue getDerValue() {
return value;
}
/**
* Get the value of this AVA as a String.
*
* @exception RuntimeException if we could not obtain the string form
* (should not occur)
*/
public String getValueString() {
try {
String s = value.getAsString();
if (s == null) {
throw new RuntimeException("AVA string is null");
}
return s;
} catch (IOException e) {
// should not occur
throw new RuntimeException("AVA error: " + e, e);
}
}
private static DerValue parseHexString
(Reader in, int format) throws IOException {
int c;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte b = 0;
int cNdx = 0;
while (true) {
c = in.read();
if (isTerminator(c, format)) {
break;
}
int cVal = hexDigits.indexOf(Character.toUpperCase((char)c));
if (cVal == -1) {
throw new IOException("AVA parse, invalid hex " +
"digit: "+ (char)c);
}
if ((cNdx % 2) == 1) {
b = (byte)((b * 16) + (byte)(cVal));
baos.write(b);
} else {
b = (byte)(cVal);
}
cNdx++;
}
// throw exception if no hex digits
if (cNdx == 0) {
throw new IOException("AVA parse, zero hex digits");
}
// throw exception if odd number of hex digits
if (cNdx % 2 == 1) {
throw new IOException("AVA parse, odd number of hex digits");
}
return new DerValue(baos.toByteArray());
}
private DerValue parseQuotedString
(Reader in, StringBuilder temp) throws IOException {
// RFC1779 specifies that an entire RDN may be enclosed in double
// quotes. In this case the syntax is any sequence of
// backslash-specialChar, backslash-backslash,
// backslash-doublequote, or character other than backslash or
// doublequote.
int c = readChar(in, "Quoted string did not end in quote");
List<Byte> embeddedHex = new ArrayList();
boolean isPrintableString = true;
while (c != '"') {
if (c == '\\') {
c = readChar(in, "Quoted string did not end in quote");
// check for embedded hex pairs
Byte hexByte = null;
if ((hexByte = getEmbeddedHexPair(c, in)) != null) {
// always encode AVAs with embedded hex as UTF8
isPrintableString = false;
// append consecutive embedded hex
// as single string later
embeddedHex.add(hexByte);
c = in.read();
continue;
}
if (specialChars1779.indexOf((char)c) < 0) {
throw new IOException
("Invalid escaped character in AVA: " +
(char)c);
}
}
// add embedded hex bytes before next char
if (embeddedHex.size() > 0) {
String hexString = getEmbeddedHexString(embeddedHex);
temp.append(hexString);
embeddedHex.clear();
}
// check for non-PrintableString chars
isPrintableString &= DerValue.isPrintableStringChar((char)c);
temp.append((char)c);
c = readChar(in, "Quoted string did not end in quote");
}
// add trailing embedded hex bytes
if (embeddedHex.size() > 0) {
String hexString = getEmbeddedHexString(embeddedHex);
temp.append(hexString);
embeddedHex.clear();
}
do {
c = in.read();
} while ((c == '\n') || (c == ' '));
if (c != -1) {
throw new IOException("AVA had characters other than "
+ "whitespace after terminating quote");
}
// encode as PrintableString unless value contains
// non-PrintableString chars
if (this.oid.equals((Object)PKCS9Attribute.EMAIL_ADDRESS_OID) ||
(this.oid.equals((Object)X500Name.DOMAIN_COMPONENT_OID) &&
PRESERVE_OLD_DC_ENCODING == false)) {
// EmailAddress and DomainComponent must be IA5String
return new DerValue(DerValue.tag_IA5String,
temp.toString().trim());
} else if (isPrintableString) {
return new DerValue(temp.toString().trim());
} else {
return new DerValue(DerValue.tag_UTF8String,
temp.toString().trim());
}
}
private DerValue parseString
(Reader in, int c, int format, StringBuilder temp) throws IOException {
List<Byte> embeddedHex = new ArrayList<>();
boolean isPrintableString = true;
boolean escape = false;
boolean leadingChar = true;
int spaceCount = 0;
do {
escape = false;
if (c == '\\') {
escape = true;
c = readChar(in, "Invalid trailing backslash");
// check for embedded hex pairs
Byte hexByte = null;
if ((hexByte = getEmbeddedHexPair(c, in)) != null) {
// always encode AVAs with embedded hex as UTF8
isPrintableString = false;
// append consecutive embedded hex
// as single string later
embeddedHex.add(hexByte);
c = in.read();
leadingChar = false;
continue;
}
// check if character was improperly escaped
if (format == DEFAULT &&
specialCharsDefault.indexOf((char)c) == -1) {
throw new IOException
("Invalid escaped character in AVA: '" +
(char)c + "'");
} else if (format == RFC2253) {
if (c == ' ') {
// only leading/trailing space can be escaped
if (!leadingChar && !trailingSpace(in)) {
throw new IOException
("Invalid escaped space character " +
"in AVA. Only a leading or trailing " +
"space character can be escaped.");
}
} else if (c == '#') {
// only leading '#' can be escaped
if (!leadingChar) {
throw new IOException
("Invalid escaped '#' character in AVA. " +
"Only a leading '#' can be escaped.");
}
} else if (specialChars2253.indexOf((char)c) == -1) {
throw new IOException
("Invalid escaped character in AVA: '" +
(char)c + "'");
}
}
} else {
// check if character should have been escaped
if (format == RFC2253) {
if (specialChars2253.indexOf((char)c) != -1) {
throw new IOException
("Character '" + (char)c +
"' in AVA appears without escape");
}
} else if (escapedDefault.indexOf((char)c) != -1) {
throw new IOException
("Character '" + (char)c +
"' in AVA appears without escape");
}
}
// add embedded hex bytes before next char
if (embeddedHex.size() > 0) {
// add space(s) before embedded hex bytes
for (int i = 0; i < spaceCount; i++) {
temp.append(" ");
}
spaceCount = 0;
String hexString = getEmbeddedHexString(embeddedHex);
temp.append(hexString);
embeddedHex.clear();
}
// check for non-PrintableString chars
isPrintableString &= DerValue.isPrintableStringChar((char)c);
if (c == ' ' && escape == false) {
// do not add non-escaped spaces yet
// (non-escaped trailing spaces are ignored)
spaceCount++;
} else {
// add space(s)
for (int i = 0; i < spaceCount; i++) {
temp.append(" ");
}
spaceCount = 0;
temp.append((char)c);
}
c = in.read();
leadingChar = false;
} while (isTerminator(c, format) == false);
if (format == RFC2253 && spaceCount > 0) {
throw new IOException("Incorrect AVA RFC2253 format - " +
"trailing space must be escaped");
}
// add trailing embedded hex bytes
if (embeddedHex.size() > 0) {
String hexString = getEmbeddedHexString(embeddedHex);
temp.append(hexString);
embeddedHex.clear();
}
// encode as PrintableString unless value contains
// non-PrintableString chars
if (this.oid.equals((Object)PKCS9Attribute.EMAIL_ADDRESS_OID) ||
(this.oid.equals((Object)X500Name.DOMAIN_COMPONENT_OID) &&
PRESERVE_OLD_DC_ENCODING == false)) {
// EmailAddress and DomainComponent must be IA5String
return new DerValue(DerValue.tag_IA5String, temp.toString());
} else if (isPrintableString) {
return new DerValue(temp.toString());
} else {
return new DerValue(DerValue.tag_UTF8String, temp.toString());
}
}
private static Byte getEmbeddedHexPair(int c1, Reader in)
throws IOException {
if (hexDigits.indexOf(Character.toUpperCase((char)c1)) >= 0) {
int c2 = readChar(in, "unexpected EOF - " +
"escaped hex value must include two valid digits");
if (hexDigits.indexOf(Character.toUpperCase((char)c2)) >= 0) {
int hi = Character.digit((char)c1, 16);
int lo = Character.digit((char)c2, 16);
return new Byte((byte)((hi<<4) + lo));
} else {
throw new IOException
("escaped hex value must include two valid digits");
}
}
return null;
}
private static String getEmbeddedHexString(List<Byte> hexList)
throws IOException {
int n = hexList.size();
byte[] hexBytes = new byte[n];
for (int i = 0; i < n; i++) {
hexBytes[i] = hexList.get(i).byteValue();
}
return new String(hexBytes, "UTF8");
}
private static boolean isTerminator(int ch, int format) {
switch (ch) {
case -1:
case '+':
case ',':
return true;
case ';':
return format != RFC2253;
default:
return false;
}
}
private static int readChar(Reader in, String errMsg) throws IOException {
int c = in.read();
if (c == -1) {
throw new IOException(errMsg);
}
return c;
}
private static boolean trailingSpace(Reader in) throws IOException {
boolean trailing = false;
if (!in.markSupported()) {
// oh well
return true;
} else {
// make readAheadLimit huge -
// in practice, AVA was passed a StringReader from X500Name,
// and StringReader ignores readAheadLimit anyways
in.mark(9999);
while (true) {
int nextChar = in.read();
if (nextChar == -1) {
trailing = true;
break;
} else if (nextChar == ' ') {
continue;
} else if (nextChar == '\\') {
int followingChar = in.read();
if (followingChar != ' ') {
trailing = false;
break;
}
} else {
trailing = false;
break;
}
}
in.reset();
return trailing;
}
}
AVA(DerValue derval) throws IOException {
// Individual attribute value assertions are SEQUENCE of two values.
// That'd be a "struct" outside of ASN.1.
if (derval.tag != DerValue.tag_Sequence) {
throw new IOException("AVA not a sequence");
}
oid = X500Name.intern(derval.data.getOID());
value = derval.data.getDerValue();
if (derval.data.available() != 0) {
throw new IOException("AVA, extra bytes = "
+ derval.data.available());
}
}
AVA(DerInputStream in) throws IOException {
this(in.getDerValue());
}
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj instanceof AVA == false) {
return false;
}
AVA other = (AVA)obj;
return this.toRFC2253CanonicalString().equals
(other.toRFC2253CanonicalString());
}
/**
* Returns a hashcode for this AVA.
*
* @return a hashcode for this AVA.
*/
public int hashCode() {
return toRFC2253CanonicalString().hashCode();
}
/*
* AVAs are encoded as a SEQUENCE of two elements.
*/
public void encode(DerOutputStream out) throws IOException {
derEncode(out);
}
/**
* DER encode this object onto an output stream.
* Implements the <code>DerEncoder interface.
*
* @param out
* the output stream on which to write the DER encoding.
*
* @exception IOException on encoding error.
*/
public void derEncode(OutputStream out) throws IOException {
DerOutputStream tmp = new DerOutputStream();
DerOutputStream tmp2 = new DerOutputStream();
tmp.putOID(oid);
value.encode(tmp);
tmp2.write(DerValue.tag_Sequence, tmp);
out.write(tmp2.toByteArray());
}
private String toKeyword(int format, Map<String, String> oidMap) {
return AVAKeyword.getKeyword(oid, format, oidMap);
}
/**
* Returns a printable form of this attribute, using RFC 1779
* syntax for individual attribute/value assertions.
*/
public String toString() {
return toKeywordValueString
(toKeyword(DEFAULT, Collections.<String, String>emptyMap()));
}
/**
* Returns a printable form of this attribute, using RFC 1779
* syntax for individual attribute/value assertions. It only
* emits standardised keywords.
*/
public String toRFC1779String() {
return toRFC1779String(Collections.<String, String>emptyMap());
}
/**
* Returns a printable form of this attribute, using RFC 1779
* syntax for individual attribute/value assertions. It
* emits standardised keywords, as well as keywords contained in the
* OID/keyword map.
*/
public String toRFC1779String(Map<String, String> oidMap) {
return toKeywordValueString(toKeyword(RFC1779, oidMap));
}
/**
* Returns a printable form of this attribute, using RFC 2253
* syntax for individual attribute/value assertions. It only
* emits standardised keywords.
*/
public String toRFC2253String() {
return toRFC2253String(Collections.<String, String>emptyMap());
}
/**
* Returns a printable form of this attribute, using RFC 2253
* syntax for individual attribute/value assertions. It
* emits standardised keywords, as well as keywords contained in the
* OID/keyword map.
*/
public String toRFC2253String(Map<String, String> oidMap) {
/*
* Section 2.3: The AttributeTypeAndValue is encoded as the string
* representation of the AttributeType, followed by an equals character
* ('=' ASCII 61), followed by the string representation of the
* AttributeValue. The encoding of the AttributeValue is given in
* section 2.4.
*/
StringBuilder typeAndValue = new StringBuilder(100);
typeAndValue.append(toKeyword(RFC2253, oidMap));
typeAndValue.append('=');
/*
* Section 2.4: Converting an AttributeValue from ASN.1 to a String.
* If the AttributeValue is of a type which does not have a string
* representation defined for it, then it is simply encoded as an
* octothorpe character ('#' ASCII 35) followed by the hexadecimal
* representation of each of the bytes of the BER encoding of the X.500
* AttributeValue. This form SHOULD be used if the AttributeType is of
* the dotted-decimal form.
*/
if ((typeAndValue.charAt(0) >= '0' && typeAndValue.charAt(0) <= '9') ||
!isDerString(value, false))
{
byte[] data = null;
try {
data = value.toByteArray();
} catch (IOException ie) {
throw new IllegalArgumentException("DER Value conversion");
}
typeAndValue.append('#');
for (int j = 0; j < data.length; j++) {
byte b = data[j];
typeAndValue.append(Character.forDigit(0xF & (b >>> 4), 16));
typeAndValue.append(Character.forDigit(0xF & b, 16));
}
} else {
/*
* 2.4 (cont): Otherwise, if the AttributeValue is of a type which
* has a string representation, the value is converted first to a
* UTF-8 string according to its syntax specification.
*
* NOTE: this implementation only emits DirectoryStrings of the
* types returned by isDerString().
*/
String valStr = null;
try {
valStr = new String(value.getDataBytes(), "UTF8");
} catch (IOException ie) {
throw new IllegalArgumentException("DER Value conversion");
}
/*
* 2.4 (cont): If the UTF-8 string does not have any of the
* following characters which need escaping, then that string can be
* used as the string representation of the value.
*
* o a space or "#" character occurring at the beginning of the
* string
* o a space character occurring at the end of the string
* o one of the characters ",", "+", """, "\", "<", ">" or ";"
*
* Implementations MAY escape other characters.
*
* NOTE: this implementation also recognizes "=" and "#" as
* characters which need escaping, and null which is escaped as
* '\00' (see RFC 4514).
*
* If a character to be escaped is one of the list shown above, then
* it is prefixed by a backslash ('\' ASCII 92).
*
* Otherwise the character to be escaped is replaced by a backslash
* and two hex digits, which form a single byte in the code of the
* character.
*/
final String escapees = ",=+<>#;\"\\";
StringBuilder sbuffer = new StringBuilder();
for (int i = 0; i < valStr.length(); i++) {
char c = valStr.charAt(i);
if (DerValue.isPrintableStringChar(c) ||
escapees.indexOf(c) >= 0) {
// escape escapees
if (escapees.indexOf(c) >= 0) {
sbuffer.append('\\');
}
// append printable/escaped char
sbuffer.append(c);
} else if (c == '\u0000') {
// escape null character
sbuffer.append("\\00");
} else if (debug != null && Debug.isOn("ava")) {
// embed non-printable/non-escaped char
// as escaped hex pairs for debugging
byte[] valueBytes = null;
try {
valueBytes = Character.toString(c).getBytes("UTF8");
} catch (IOException ie) {
throw new IllegalArgumentException
("DER Value conversion");
}
for (int j = 0; j < valueBytes.length; j++) {
sbuffer.append('\\');
char hexChar = Character.forDigit
(0xF & (valueBytes[j] >>> 4), 16);
sbuffer.append(Character.toUpperCase(hexChar));
hexChar = Character.forDigit
(0xF & (valueBytes[j]), 16);
sbuffer.append(Character.toUpperCase(hexChar));
}
} else {
// append non-printable/non-escaped char
sbuffer.append(c);
}
}
char[] chars = sbuffer.toString().toCharArray();
sbuffer = new StringBuilder();
// Find leading and trailing whitespace.
int lead; // index of first char that is not leading whitespace
for (lead = 0; lead < chars.length; lead++) {
if (chars[lead] != ' ' && chars[lead] != '\r') {
break;
}
}
int trail; // index of last char that is not trailing whitespace
for (trail = chars.length - 1; trail >= 0; trail--) {
if (chars[trail] != ' ' && chars[trail] != '\r') {
break;
}
}
// escape leading and trailing whitespace
for (int i = 0; i < chars.length; i++) {
char c = chars[i];
if (i < lead || i > trail) {
sbuffer.append('\\');
}
sbuffer.append(c);
}
typeAndValue.append(sbuffer.toString());
}
return typeAndValue.toString();
}
public String toRFC2253CanonicalString() {
/*
* Section 2.3: The AttributeTypeAndValue is encoded as the string
* representation of the AttributeType, followed by an equals character
* ('=' ASCII 61), followed by the string representation of the
* AttributeValue. The encoding of the AttributeValue is given in
* section 2.4.
*/
StringBuilder typeAndValue = new StringBuilder(40);
typeAndValue.append
(toKeyword(RFC2253, Collections.<String, String>emptyMap()));
typeAndValue.append('=');
/*
* Section 2.4: Converting an AttributeValue from ASN.1 to a String.
* If the AttributeValue is of a type which does not have a string
* representation defined for it, then it is simply encoded as an
* octothorpe character ('#' ASCII 35) followed by the hexadecimal
* representation of each of the bytes of the BER encoding of the X.500
* AttributeValue. This form SHOULD be used if the AttributeType is of
* the dotted-decimal form.
*/
if ((typeAndValue.charAt(0) >= '0' && typeAndValue.charAt(0) <= '9') ||
!isDerString(value, true))
{
byte[] data = null;
try {
data = value.toByteArray();
} catch (IOException ie) {
throw new IllegalArgumentException("DER Value conversion");
}
typeAndValue.append('#');
for (int j = 0; j < data.length; j++) {
byte b = data[j];
typeAndValue.append(Character.forDigit(0xF & (b >>> 4), 16));
typeAndValue.append(Character.forDigit(0xF & b, 16));
}
} else {
/*
* 2.4 (cont): Otherwise, if the AttributeValue is of a type which
* has a string representation, the value is converted first to a
* UTF-8 string according to its syntax specification.
*
* NOTE: this implementation only emits DirectoryStrings of the
* types returned by isDerString().
*/
String valStr = null;
try {
valStr = new String(value.getDataBytes(), "UTF8");
} catch (IOException ie) {
throw new IllegalArgumentException("DER Value conversion");
}
/*
* 2.4 (cont): If the UTF-8 string does not have any of the
* following characters which need escaping, then that string can be
* used as the string representation of the value.
*
* o a space or "#" character occurring at the beginning of the
* string
* o a space character occurring at the end of the string
*
* o one of the characters ",", "+", """, "\", "<", ">" or ";"
*
* If a character to be escaped is one of the list shown above, then
* it is prefixed by a backslash ('\' ASCII 92).
*
* Otherwise the character to be escaped is replaced by a backslash
* and two hex digits, which form a single byte in the code of the
* character.
*/
final String escapees = ",+<>;\"\\";
StringBuilder sbuffer = new StringBuilder();
boolean previousWhite = false;
for (int i = 0; i < valStr.length(); i++) {
char c = valStr.charAt(i);
if (DerValue.isPrintableStringChar(c) ||
escapees.indexOf(c) >= 0 ||
(i == 0 && c == '#')) {
// escape leading '#' and escapees
if ((i == 0 && c == '#') || escapees.indexOf(c) >= 0) {
sbuffer.append('\\');
}
// convert multiple whitespace to single whitespace
if (!Character.isWhitespace(c)) {
previousWhite = false;
sbuffer.append(c);
} else {
if (previousWhite == false) {
// add single whitespace
previousWhite = true;
sbuffer.append(c);
} else {
// ignore subsequent consecutive whitespace
continue;
}
}
} else if (debug != null && Debug.isOn("ava")) {
// embed non-printable/non-escaped char
// as escaped hex pairs for debugging
previousWhite = false;
byte valueBytes[] = null;
try {
valueBytes = Character.toString(c).getBytes("UTF8");
} catch (IOException ie) {
throw new IllegalArgumentException
("DER Value conversion");
}
for (int j = 0; j < valueBytes.length; j++) {
sbuffer.append('\\');
sbuffer.append(Character.forDigit
(0xF & (valueBytes[j] >>> 4), 16));
sbuffer.append(Character.forDigit
(0xF & (valueBytes[j]), 16));
}
} else {
// append non-printable/non-escaped char
previousWhite = false;
sbuffer.append(c);
}
}
// remove leading and trailing whitespace from value
typeAndValue.append(sbuffer.toString().trim());
}
String canon = typeAndValue.toString();
canon = canon.toUpperCase(Locale.US).toLowerCase(Locale.US);
return Normalizer.normalize(canon, Normalizer.Form.NFKD);
}
/*
* Return true if DerValue can be represented as a String.
*/
private static boolean isDerString(DerValue value, boolean canonical) {
if (canonical) {
switch (value.tag) {
case DerValue.tag_PrintableString:
case DerValue.tag_UTF8String:
return true;
default:
return false;
}
} else {
switch (value.tag) {
case DerValue.tag_PrintableString:
case DerValue.tag_T61String:
case DerValue.tag_IA5String:
case DerValue.tag_GeneralString:
case DerValue.tag_BMPString:
case DerValue.tag_UTF8String:
return true;
default:
return false;
}
}
}
boolean hasRFC2253Keyword() {
return AVAKeyword.hasKeyword(oid, RFC2253);
}
private String toKeywordValueString(String keyword) {
/*
* Construct the value with as little copying and garbage
* production as practical. First the keyword (mandatory),
* then the equals sign, finally the value.
*/
StringBuilder retval = new StringBuilder(40);
retval.append(keyword);
retval.append("=");
try {
String valStr = value.getAsString();
if (valStr == null) {
// rfc1779 specifies that attribute values associated
// with non-standard keyword attributes may be represented
// using the hex format below. This will be used only
// when the value is not a string type
byte data [] = value.toByteArray();
retval.append('#');
for (int i = 0; i < data.length; i++) {
retval.append(hexDigits.charAt((data [i] >> 4) & 0x0f));
retval.append(hexDigits.charAt(data [i] & 0x0f));
}
} else {
boolean quoteNeeded = false;
StringBuilder sbuffer = new StringBuilder();
boolean previousWhite = false;
final String escapees = ",+=\n<>#;\\\"";
/*
* Special characters (e.g. AVA list separators) cause strings
* to need quoting, or at least escaping. So do leading or
* trailing spaces, and multiple internal spaces.
*/
int length = valStr.length();
boolean alreadyQuoted =
(length > 1 && valStr.charAt(0) == '\"'
&& valStr.charAt(length - 1) == '\"');
for (int i = 0; i < length; i++) {
char c = valStr.charAt(i);
if (alreadyQuoted && (i == 0 || i == length - 1)) {
sbuffer.append(c);
continue;
}
if (DerValue.isPrintableStringChar(c) ||
escapees.indexOf(c) >= 0) {
// quote if leading whitespace or special chars
if (!quoteNeeded &&
((i == 0 && (c == ' ' || c == '\n')) ||
escapees.indexOf(c) >= 0)) {
quoteNeeded = true;
}
// quote if multiple internal whitespace
if (!(c == ' ' || c == '\n')) {
// escape '"' and '\'
if (c == '"' || c == '\\') {
sbuffer.append('\\');
}
previousWhite = false;
} else {
if (!quoteNeeded && previousWhite) {
quoteNeeded = true;
}
previousWhite = true;
}
sbuffer.append(c);
} else if (debug != null && Debug.isOn("ava")) {
// embed non-printable/non-escaped char
// as escaped hex pairs for debugging
previousWhite = false;
// embed escaped hex pairs
byte[] valueBytes =
Character.toString(c).getBytes("UTF8");
for (int j = 0; j < valueBytes.length; j++) {
sbuffer.append('\\');
char hexChar = Character.forDigit
(0xF & (valueBytes[j] >>> 4), 16);
sbuffer.append(Character.toUpperCase(hexChar));
hexChar = Character.forDigit
(0xF & (valueBytes[j]), 16);
sbuffer.append(Character.toUpperCase(hexChar));
}
} else {
// append non-printable/non-escaped char
previousWhite = false;
sbuffer.append(c);
}
}
// quote if trailing whitespace
if (sbuffer.length() > 0) {
char trailChar = sbuffer.charAt(sbuffer.length() - 1);
if (trailChar == ' ' || trailChar == '\n') {
quoteNeeded = true;
}
}
// Emit the string ... quote it if needed
// if string is already quoted, don't re-quote
if (!alreadyQuoted && quoteNeeded) {
retval.append("\"" + sbuffer.toString() + "\"");
} else {
retval.append(sbuffer.toString());
}
}
} catch (IOException e) {
throw new IllegalArgumentException("DER Value conversion");
}
return retval.toString();
}
}
/**
* Helper class that allows conversion from String to ObjectIdentifier and
* vice versa according to RFC1779, RFC2253, and an augmented version of
* those standards.
*/
class AVAKeyword {
private static final Map<ObjectIdentifier,AVAKeyword> oidMap;
private static final Map<String,AVAKeyword> keywordMap;
private String keyword;
private ObjectIdentifier oid;
private boolean rfc1779Compliant, rfc2253Compliant;
private AVAKeyword(String keyword, ObjectIdentifier oid,
boolean rfc1779Compliant, boolean rfc2253Compliant) {
this.keyword = keyword;
this.oid = oid;
this.rfc1779Compliant = rfc1779Compliant;
this.rfc2253Compliant = rfc2253Compliant;
// register it
oidMap.put(oid, this);
keywordMap.put(keyword, this);
}
private boolean isCompliant(int standard) {
switch (standard) {
case AVA.RFC1779:
return rfc1779Compliant;
case AVA.RFC2253:
return rfc2253Compliant;
case AVA.DEFAULT:
return true;
default:
// should not occur, internal error
throw new IllegalArgumentException("Invalid standard " + standard);
}
}
/**
* Get an object identifier representing the specified keyword (or
* string encoded object identifier) in the given standard.
*
* @param keywordMap a Map where a keyword String maps to a corresponding
* OID String. Each AVA keyword will be mapped to the corresponding OID.
* If an entry does not exist, it will fallback to the builtin
* keyword/OID mapping.
* @throws IOException If the keyword is not valid in the specified standard
* or the OID String to which a keyword maps to is improperly formatted.
*/
static ObjectIdentifier getOID
(String keyword, int standard, Map<String, String> extraKeywordMap)
throws IOException {
keyword = keyword.toUpperCase(Locale.ENGLISH);
if (standard == AVA.RFC2253) {
if (keyword.startsWith(" ") || keyword.endsWith(" ")) {
throw new IOException("Invalid leading or trailing space " +
"in keyword \"" + keyword + "\"");
}
} else {
keyword = keyword.trim();
}
// check user-specified keyword map first, then fallback to built-in
// map
String oidString = extraKeywordMap.get(keyword);
if (oidString == null) {
AVAKeyword ak = keywordMap.get(keyword);
if ((ak != null) && ak.isCompliant(standard)) {
return ak.oid;
}
} else {
return new ObjectIdentifier(oidString);
}
// no keyword found, check if OID string
if (standard == AVA.DEFAULT && keyword.startsWith("OID.")) {
keyword = keyword.substring(4);
}
boolean number = false;
if (keyword.length() != 0) {
char ch = keyword.charAt(0);
if ((ch >= '0') && (ch <= '9')) {
number = true;
}
}
if (number == false) {
throw new IOException("Invalid keyword \"" + keyword + "\"");
}
return new ObjectIdentifier(keyword);
}
/**
* Get a keyword for the given ObjectIdentifier according to standard.
* If no keyword is available, the ObjectIdentifier is encoded as a
* String.
*/
static String getKeyword(ObjectIdentifier oid, int standard) {
return getKeyword
(oid, standard, Collections.<String, String>emptyMap());
}
/**
* Get a keyword for the given ObjectIdentifier according to standard.
* Checks the extraOidMap for a keyword first, then falls back to the
* builtin/default set. If no keyword is available, the ObjectIdentifier
* is encoded as a String.
*/
static String getKeyword
(ObjectIdentifier oid, int standard, Map<String, String> extraOidMap) {
// check extraOidMap first, then fallback to built-in map
String oidString = oid.toString();
String keywordString = extraOidMap.get(oidString);
if (keywordString == null) {
AVAKeyword ak = oidMap.get(oid);
if ((ak != null) && ak.isCompliant(standard)) {
return ak.keyword;
}
} else {
if (keywordString.length() == 0) {
throw new IllegalArgumentException("keyword cannot be empty");
}
keywordString = keywordString.trim();
char c = keywordString.charAt(0);
if (c < 65 || c > 122 || (c > 90 && c < 97)) {
throw new IllegalArgumentException
("keyword does not start with letter");
}
for (int i=1; i<keywordString.length(); i++) {
c = keywordString.charAt(i);
if ((c < 65 || c > 122 || (c > 90 && c < 97)) &&
(c < 48 || c > 57) && c != '_') {
throw new IllegalArgumentException
("keyword character is not a letter, digit, or underscore");
}
}
return keywordString;
}
// no compliant keyword, use OID
if (standard == AVA.RFC2253) {
return oidString;
} else {
return "OID." + oidString;
}
}
/**
* Test if oid has an associated keyword in standard.
*/
static boolean hasKeyword(ObjectIdentifier oid, int standard) {
AVAKeyword ak = oidMap.get(oid);
if (ak == null) {
return false;
}
return ak.isCompliant(standard);
}
static {
oidMap = new HashMap<ObjectIdentifier,AVAKeyword>();
keywordMap = new HashMap<String,AVAKeyword>();
// NOTE if multiple keywords are available for one OID, order
// is significant!! Preferred *LAST*.
new AVAKeyword("CN", X500Name.commonName_oid, true, true);
new AVAKeyword("C", X500Name.countryName_oid, true, true);
new AVAKeyword("L", X500Name.localityName_oid, true, true);
new AVAKeyword("S", X500Name.stateName_oid, false, false);
new AVAKeyword("ST", X500Name.stateName_oid, true, true);
new AVAKeyword("O", X500Name.orgName_oid, true, true);
new AVAKeyword("OU", X500Name.orgUnitName_oid, true, true);
new AVAKeyword("T", X500Name.title_oid, false, false);
new AVAKeyword("IP", X500Name.ipAddress_oid, false, false);
new AVAKeyword("STREET", X500Name.streetAddress_oid,true, true);
new AVAKeyword("DC", X500Name.DOMAIN_COMPONENT_OID,
false, true);
new AVAKeyword("DNQUALIFIER", X500Name.DNQUALIFIER_OID, false, false);
new AVAKeyword("DNQ", X500Name.DNQUALIFIER_OID, false, false);
new AVAKeyword("SURNAME", X500Name.SURNAME_OID, false, false);
new AVAKeyword("GIVENNAME", X500Name.GIVENNAME_OID, false, false);
new AVAKeyword("INITIALS", X500Name.INITIALS_OID, false, false);
new AVAKeyword("GENERATION", X500Name.GENERATIONQUALIFIER_OID,
false, false);
new AVAKeyword("EMAIL", PKCS9Attribute.EMAIL_ADDRESS_OID, false, false);
new AVAKeyword("EMAILADDRESS", PKCS9Attribute.EMAIL_ADDRESS_OID,
false, false);
new AVAKeyword("UID", X500Name.userid_oid, false, true);
new AVAKeyword("SERIALNUMBER", X500Name.SERIALNUMBER_OID, false, false);
}
}
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