/** Read a Key Pair */
public Object parseObject(PemObject obj) throws IOException {
boolean isEncrypted = false;
String dekInfo = null;
List headers = obj.getHeaders();
for (Iterator it = headers.iterator(); it.hasNext(); ) {
PemHeader hdr = (PemHeader) it.next();
if (hdr.getName().equals("Proc-Type") && hdr.getValue().equals("4,ENCRYPTED")) {
isEncrypted = true;
} else if (hdr.getName().equals("DEK-Info")) {
dekInfo = hdr.getValue();
}
}
//
// extract the key
//
byte[] keyBytes = obj.getContent();
try {
if (isEncrypted) {
StringTokenizer tknz = new StringTokenizer(dekInfo, ",");
String dekAlgName = tknz.nextToken();
byte[] iv = Hex.decode(tknz.nextToken());
return new PEMEncryptedKeyPair(dekAlgName, iv, keyBytes, pemKeyPairParser);
}
return pemKeyPairParser.parse(keyBytes);
} catch (IOException e) {
if (isEncrypted) {
throw new PEMException("exception decoding - please check password and data.", e);
} else {
throw new PEMException(e.getMessage(), e);
}
} catch (IllegalArgumentException e) {
if (isEncrypted) {
throw new PEMException("exception decoding - please check password and data.", e);
} else {
throw new PEMException(e.getMessage(), e);
}
}
}