package org.spongycastle.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.spongycastle.util.encoders.Base64; 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())); } }