| /* |
| * ==================================================================== |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.ssl; |
| |
| import java.util.BitSet; |
| |
| import org.apache.hc.core5.http.ParseException; |
| import org.apache.hc.core5.http.ProtocolVersion; |
| import org.apache.hc.core5.http.message.ParserCursor; |
| import org.apache.hc.core5.http.message.TokenParser; |
| |
| final class TlsVersionParser { |
| |
| public final static TlsVersionParser INSTANCE = new TlsVersionParser(); |
| |
| private final TokenParser tokenParser; |
| |
| TlsVersionParser() { |
| this.tokenParser = TokenParser.INSTANCE; |
| } |
| |
| ProtocolVersion parse( |
| final CharSequence buffer, |
| final ParserCursor cursor, |
| final BitSet delimiters) throws ParseException { |
| final int lowerBound = cursor.getLowerBound(); |
| final int upperBound = cursor.getUpperBound(); |
| |
| int pos = cursor.getPos(); |
| if (pos + 4 > cursor.getUpperBound()) { |
| throw new ParseException("Invalid TLS protocol version", buffer, lowerBound, upperBound, pos); |
| } |
| if (buffer.charAt(pos) != 'T' || buffer.charAt(pos + 1) != 'L' || buffer.charAt(pos + 2) != 'S' |
| || buffer.charAt(pos + 3) != 'v') { |
| throw new ParseException("Invalid TLS protocol version", buffer, lowerBound, upperBound, pos); |
| } |
| pos = pos + 4; |
| cursor.updatePos(pos); |
| if (cursor.atEnd()) { |
| throw new ParseException("Invalid TLS version", buffer, lowerBound, upperBound, pos); |
| } |
| final String s = this.tokenParser.parseToken(buffer, cursor, delimiters); |
| final int idx = s.indexOf('.'); |
| if (idx == -1) { |
| final int major; |
| try { |
| major = Integer.parseInt(s); |
| } catch (final NumberFormatException e) { |
| throw new ParseException("Invalid TLS major version", buffer, lowerBound, upperBound, pos); |
| } |
| return new ProtocolVersion("TLS", major, 0); |
| } else { |
| final String s1 = s.substring(0, idx); |
| final int major; |
| try { |
| major = Integer.parseInt(s1); |
| } catch (final NumberFormatException e) { |
| throw new ParseException("Invalid TLS major version", buffer, lowerBound, upperBound, pos); |
| } |
| final String s2 = s.substring(idx + 1); |
| final int minor; |
| try { |
| minor = Integer.parseInt(s2); |
| } catch (final NumberFormatException e) { |
| throw new ParseException("Invalid TLS minor version", buffer, lowerBound, upperBound, pos); |
| } |
| return new ProtocolVersion("TLS", major, minor); |
| } |
| } |
| |
| ProtocolVersion parse(final String s) throws ParseException { |
| if (s == null) { |
| return null; |
| } |
| final ParserCursor cursor = new ParserCursor(0, s.length()); |
| return parse(s, cursor, null); |
| } |
| |
| } |
| |