1 package org.bouncycastle.util.io.pem; 2 3 import java.io.BufferedReader; 4 import java.io.IOException; 5 import java.io.Reader; 6 import java.util.ArrayList; 7 import java.util.List; 8 9 import org.bouncycastle.util.encoders.Base64; 10 11 public class PemReader 12 extends BufferedReader 13 { 14 private static final String BEGIN = "-----BEGIN "; 15 private static final String END = "-----END "; 16 17 public PemReader(Reader reader) 18 { 19 super(reader); 20 } 21 22 public PemObject readPemObject() 23 throws IOException 24 { 25 String line = readLine(); 26 27 while (line != null && !line.startsWith(BEGIN)) 28 { 29 line = readLine(); 30 } 31 32 if (line != null) 33 { 34 line = line.substring(BEGIN.length()); 35 int index = line.indexOf('-'); 36 String type = line.substring(0, index); 37 38 if (index > 0) 39 { 40 return loadObject(type); 41 } 42 } 43 44 return null; 45 } 46 47 private PemObject loadObject(String type) 48 throws IOException 49 { 50 String line; 51 String endMarker = END + type; 52 StringBuffer buf = new StringBuffer(); 53 List headers = new ArrayList(); 54 55 while ((line = readLine()) != null) 56 { 57 if (line.indexOf(":") >= 0) 58 { 59 int index = line.indexOf(':'); 60 String hdr = line.substring(0, index); 61 String value = line.substring(index + 1).trim(); 62 63 headers.add(new PemHeader(hdr, value)); 64 65 continue; 66 } 67 68 if (line.indexOf(endMarker) != -1) 69 { 70 break; 71 } 72 73 buf.append(line.trim()); 74 } 75 76 if (line == null) 77 { 78 throw new IOException(endMarker + " not found"); 79 } 80 81 return new PemObject(type, headers, Base64.decode(buf.toString())); 82 } 83 84 } 85
