/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1999 by Sun Microsystems, Inc. * All rights reserved. * */ // ServiceLocationAttributeV1.java: SLPv1 character encoding and decoding // Author: James Kempf // Created On: Fri Oct 9 19:18:17 1998 // Last Modified By: James Kempf // Last Modified On: Sat Oct 24 13:17:58 1998 // Update Count: 15 // package com.sun.slp; import java.util.*; /** * Handles attribute string encoding and decoding for SLPv1. * * @author James Kempf */ class ServiceLocationAttributeV1 extends ServiceLocationAttribute { String charCode = IANACharCode.UTF8; // how to encode the attribute. // Characters to escape. final private static String UNESCAPABLE_CHARS = ",=!>= 'A') && ((char)i <= 'Z')) { c = (char)((char)i - 'A'); } if (((char)i >= 'a') && ((char)i <= 'z')) { c = (char)((char)i - 'a' +(char) 26); } if (((char)i >= '0') && ((char)i <= '9')) { c = (char)((char)i - '0' +(char) 52); } if ((char)i == '+') { c = (char)62; } if ((char)i == '/') { c = (char)63; } if ((char)i == '=') { c = (char)0; } if (c == 0xffff) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } return c; } // format of the encoding is "(###:encoding)" where ### is the length // convert a string in the encoding to the buffer format static Opaque radix64ToOpaque(String s) throws ServiceLocationException { if (s == null || s.trim().length() == 0) { return new Opaque(new byte[0]); } int oplen = 0; int scan = 0; while (scan < s.length()) { if (s.charAt(scan) == '(') { break; // scan till begins } scan++; } scan++; // past the '(' while (scan < s.length()) { if (Character.isWhitespace(s.charAt(scan)) == false) { break; } scan++; } while (scan < s.length()) { if (Character.isDigit(s.charAt(scan))) { oplen *= 10; oplen += (s.charAt(scan) - '0'); scan++; } else { break; } } if (scan >= s.length()) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } if (s.charAt(scan) != ':') { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } scan++; // past the ':' byte b[] = new byte[oplen]; int pos = 0; int timesthrough = (oplen/3); if ((oplen %3) != 0) { timesthrough++; } for (int i = 0; i < timesthrough; i++) { // get 4 bytes to make 3 with, skipping blanks char v[] = new char[4]; for (int x = 0; x < 4; x++) { while ((scan < s.length()) && Character.isWhitespace(s.charAt(scan))) { scan++; // eat white } if (scan >= s.length()) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } v[x] = LUT2(s.charAt(scan), s); scan++; } b[pos++] = (byte) (((0x3F & v[0]) << 2) + ((0x30 & v[1]) >> 4)); if (pos >= oplen) break; b[pos++] = (byte) (((0x0F & v[1]) << 4) + ((0x3C & v[2]) >> 2)); if (pos >= oplen) break; b[pos++] = (byte) (((0x03 & v[2]) << 6) + (0x3F & v[3])); } // end of conversion loop if (scan >= s.length()) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } if (s.charAt(scan) != ')') {// check for too many chars. throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_radix64_error", new Object[] {s}); } return new Opaque(b); } // convert an Opaque to the encoding static String opaqueToRadix64(Opaque oq) { byte[] b = oq.bytes; if (b == null) { return new String(""); } StringBuffer sb = new StringBuffer("("+b.length+":"); int datalen; int fill = b.length%3; if (fill == 0) { datalen = (b.length / 3) * 4; } else { datalen = ((b.length / 3) + 1) * 4; } int dataoffset = 0; int more = (b.length%3); if (more != 0) { more = 1; } int a[] = new int[4]; for (int i = 0; i < ((b.length/3)+more-1); i++) { a[0] = (int)(0xFC & (char)b[ dataoffset ]) >> 2; a[1] = ((int)(0x03 & (char)b[ dataoffset ]) << 4) + ((int)(0xF0 & (char)b[ dataoffset + 1]) >> 4); a[2] = ((int)(0x0F & (char)b[ dataoffset + 1]) << 2) + ((int)(0xC0 & (char)b[ dataoffset + 2]) >> 6); a[3] = (int)(0x3F & (char)b[ dataoffset + 2]); for (int j = 0; j < 4; j++) { sb.append(LUT((char)a[j])); } dataoffset += 3; } byte f1 = 0, f2 = 0; if (fill == 0) { f1 = b[ dataoffset + 1 ]; f2 = b[ dataoffset + 2 ]; } else if (fill == 2) { f1 = b[ dataoffset + 1 ]; } a[0] = (int) (0xFC & (char)b[ dataoffset ]) >> 2; a[1] = ((int) (0x03 & (char)b[ dataoffset ]) << 4) + ((int) (0xF0 & (char)f1) >> 4); a[2] = ((int) (0x0F & (char)f1) << 2) + ((int) (0xC0 & (char)f2) >> 6); a[3] = (int) (0x3F & (char)f2); for (int j = 0; j < 4; j++) { sb.append(LUT((char) a[j])); } sb.append(")"); return sb.toString(); } } // Create an SLPv1 attribute from a general attribute. ServiceLocationAttributeV1(ServiceLocationAttribute attr) { id = attr.id; values = attr.values; } // Create an SLPv1 attribute from the parenthesized expression, using // charCode to decode any encodings. ServiceLocationAttributeV1(String exp, String charCode, boolean allowMultiValuedBooleans) throws ServiceLocationException { this.charCode = charCode; // If start and end paren, then parse out assignment. if (exp.startsWith("(") && exp.endsWith(")")) { StringTokenizer tk = new StringTokenizer(exp.substring(1, exp.length() - 1), "=", true); try { // Get the tag. id = unescapeAttributeString(tk.nextToken(), charCode); if (id.length() <= 0) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "null_id", new Object[] {exp}); } tk.nextToken(); // get rid of "=" // Gather the rest. String rest = tk.nextToken(""); // Parse the comma separated list. values = SrvLocHeader.parseCommaSeparatedListIn(rest, true); // Convert to objects. int i, n = values.size(); Class vecClass = null; for (i = 0; i < n; i++) { String value = (String)values.elementAt(i); // Need to determine which type to use. Object o = evaluate(value, charCode); // Convert Opaque to byte array. if (o instanceof Opaque) { o = ((Opaque)o).bytes; } values.setElementAt(o, i); } } catch (NoSuchElementException ex) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "assignment_syntax_err", new Object[] {exp}); } verifyValueTypes(values, allowMultiValuedBooleans); } else { // Check to make sure there's no parens. if (exp.indexOf('(') != -1 || exp.indexOf(')') != -1) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "assignment_syntax_err", new Object[] {exp}); } // Unescape the keyword. id = unescapeAttributeString(exp, charCode); } } // Duplicate of the one in ServiceLocatioAttribute, except we use our // unescapeAttributeString. static Object evaluate(String value, String charCode) throws ServiceLocationException { Object o = null; // If it can be converted into an integer, then convert it. try { o = Integer.valueOf(value); } catch (NumberFormatException ex) { // Wasn't an integer. Try boolean. if (value.equalsIgnoreCase(TRUE) || value.equalsIgnoreCase(FALSE)) { o = Boolean.valueOf(value); } else { // Process the string to remove escapes. String val = (String)value; // If it begins with the opaque prefix, treat it as an // opaque. Use radix64 parser to convert. if (val.startsWith("(")) { o = Radix64.radix64ToOpaque(val); } else { o = unescapeAttributeString(val, charCode); } } } return o; } // Externalize the attribute, using its charCode to encode any reserved // characters. String externalize() throws ServiceLocationException { if (values == null) { // keyword attribute... return escapeAttributeString(id, charCode); } Vector v = new Vector(); for (Enumeration e = values.elements(); e.hasMoreElements(); ) { Object o = e.nextElement(); String s = null; s = escapeValueInternal(o, charCode); v.addElement(s); } StringBuffer buf = new StringBuffer("(" + escapeAttributeString(id, charCode) + "="); buf.append(SrvLocHeader.vectorToCommaSeparatedList(v)); buf.append(")"); return buf.toString(); } // Exactly like the one in ServiceLocationAttribute, but use our // escapeAttributeString. private static String escapeValueInternal(Object val, String charCode) { String s; // Escape any characters needing it. if (val instanceof String) { try { s = escapeAttributeString((String)val, charCode); } catch (ServiceLocationException ex) { throw new IllegalArgumentException(ex.getMessage()); } } else if (val instanceof Opaque) { // Convert to radix 64. s = Radix64.opaqueToRadix64((Opaque)val); } else { s = val.toString(); } return s; } // Escape an attribute string with the char code. static String escapeAttributeString(String string, String charCode) throws ServiceLocationException { StringBuffer buf = new StringBuffer(); int i, n = string.length(); boolean is8bit = (charCode.equals(IANACharCode.ASCII) || charCode.equals(IANACharCode.LATIN1)); for (i = 0; i < n; i++) { char c = string.charAt(i); if (ESCAPABLE_CHARS.indexOf(c) != -1) { buf.append("&#"); buf.append(IANACharCode.escapeChar(c, charCode)); buf.append(";"); } else { // Need to check ASCII and LATIN1 to make sure that // the character is not outside their range of // representation. if (is8bit && (short)c > 255) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_8bit_error", new Object[] {new Character(c)}); } buf.append(c); } } return buf.toString(); } // Unescape attribute string, using charCode for reserved characters. static String unescapeAttributeString(String string, String charCode) throws ServiceLocationException { // Process escapes. int i, n = string.length(); StringBuffer buf = new StringBuffer(n); for (i = 0; i < n; i++) { char c = string.charAt(i); // Check for invalids. int idx = -1; if ((idx = UNESCAPABLE_CHARS.indexOf(c)) != -1) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } // Check for escapes. if (c != '&') { buf.append(c); } else { // Check to be sure we've got enough characters left. We need // at least 3. if ((i + 1) >= n) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } c = string.charAt(++i); if (c != '#') { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } // Iterate through numbers, collecting. StringBuffer num = new StringBuffer(n); for (i++; i < n; i++) { c = string.charAt(i); if (!Character.isDigit(c)) { break; } num.append(c); } // If the buffer is empty, then throw exception if (num.length() <= 0) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } // If the last one isn't ";", we've got a problem. if (c != ';') { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } // OK, now convert to a character and add to buffer. try { buf.append(IANACharCode.unescapeChar(num.toString(), charCode)); } catch (NumberFormatException ex) { throw new ServiceLocationException( ServiceLocationException.PARSE_ERROR, "v1_escape_error", new Object[] {string}); } } } return buf.toString(); } }