| package org.bouncycastle.util.io.pem; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.bouncycastle.util.encoders.Base64; |
| |
| /** |
| * A generic PEM reader, based on the format outlined in RFC 1421 |
| */ |
| public class PemReader |
| extends BufferedReader |
| { |
| private static final String BEGIN = "-----BEGIN "; |
| private static final String END = "-----END "; |
| |
| public PemReader(Reader reader) |
| { |
| super(reader); |
| } |
| |
| public PemObject readPemObject() |
| throws IOException |
| { |
| String line = readLine(); |
| |
| while (line != null && !line.startsWith(BEGIN)) |
| { |
| line = readLine(); |
| } |
| |
| if (line != null) |
| { |
| line = line.substring(BEGIN.length()); |
| int index = line.indexOf('-'); |
| String type = line.substring(0, index); |
| |
| if (index > 0) |
| { |
| return loadObject(type); |
| } |
| } |
| |
| return null; |
| } |
| |
| private PemObject loadObject(String type) |
| throws IOException |
| { |
| String line; |
| String endMarker = END + type; |
| StringBuffer buf = new StringBuffer(); |
| List headers = new ArrayList(); |
| |
| while ((line = readLine()) != null) |
| { |
| if (line.indexOf(":") >= 0) |
| { |
| int index = line.indexOf(':'); |
| String hdr = line.substring(0, index); |
| String value = line.substring(index + 1).trim(); |
| |
| headers.add(new PemHeader(hdr, value)); |
| |
| continue; |
| } |
| |
| if (line.indexOf(endMarker) != -1) |
| { |
| break; |
| } |
| |
| buf.append(line.trim()); |
| } |
| |
| if (line == null) |
| { |
| throw new IOException(endMarker + " not found"); |
| } |
| |
| return new PemObject(type, headers, Base64.decode(buf.toString())); |
| } |
| |
| } |