Program: 187876
Project: 187876
Buggy source:
/** 
 * encrypt a string using a random session key
 * @author Peli
 * @param plaintext
 * @return encrypted String
 * @throws Exception
 */
public String encryptWithSessionKey(String plaintext) throws CryptoHelperException {
  Log.i(TAG,"String_Node_Str");
  status=false;
  if (password == null) {
    String msg="String_Node_Str";
    throw new CryptoHelperException(msg);
  }
  byte[] cipherSessionKey={};
  byte[] ciphertext={};
  SecretKey sessionKey=null;
  byte[] sessionKeyEncoded=null;
  String sessionKeyString=null;
  try {
    KeyGenerator keygen;
    keygen=KeyGenerator.getInstance("String_Node_Str");
    keygen.init(256);
    sessionKey=keygen.generateKey();
    sessionKeyEncoded=sessionKey.getEncoded();
    sessionKeyString=new String(sessionKeyEncoded);
  }
 catch (  NoSuchAlgorithmException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  PBEKeySpec sessionPbeKeySpec=new PBEKeySpec(sessionKeyString.toCharArray());
  SecretKey sessionPbeKey=null;
  try {
    sessionPbeKey=keyFac.generateSecret(sessionPbeKeySpec);
  }
 catch (  InvalidKeySpecException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  try {
    pbeCipher.init(Cipher.ENCRYPT_MODE,pbeKey,pbeParamSpec);
    cipherSessionKey=pbeCipher.doFinal(sessionKeyEncoded);
  }
 catch (  IllegalBlockSizeException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  BadPaddingException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidKeyException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidAlgorithmParameterException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  try {
    pbeCipher.init(Cipher.ENCRYPT_MODE,sessionPbeKey,pbeParamSpec);
    ciphertext=pbeCipher.doFinal(plaintext.getBytes());
    status=true;
  }
 catch (  IllegalBlockSizeException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  BadPaddingException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidKeyException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidAlgorithmParameterException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  String stringCipherSessionKey=toHexString(cipherSessionKey);
  String stringCiphertext=toHexString(ciphertext);
  Log.i(TAG,"String_Node_Str" + stringCipherSessionKey.length() + "String_Node_Str"+ stringCipherSessionKey);
  return stringCipherSessionKey + stringCiphertext;
}

Fixed version (ground truth):
/** 
 * encrypt a string using a random session key
 * @author Peli
 * @param plaintext
 * @return encrypted String
 * @throws Exception
 */
public String encryptWithSessionKey(String plaintext) throws CryptoHelperException {
  Log.i(TAG,"String_Node_Str");
  status=false;
  if (password == null) {
    String msg="String_Node_Str";
    throw new CryptoHelperException(msg);
  }
  byte[] cipherSessionKey={};
  byte[] ciphertext={};
  SecretKey sessionKey=null;
  byte[] sessionKeyEncoded=null;
  String sessionKeyString=null;
  try {
    KeyGenerator keygen;
    keygen=KeyGenerator.getInstance("String_Node_Str");
    keygen.init(256);
    sessionKey=keygen.generateKey();
    sessionKeyEncoded=sessionKey.getEncoded();
    sessionKeyString=new String(sessionKeyEncoded);
  }
 catch (  NoSuchAlgorithmException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  PBEKeySpec sessionPbeKeySpec=new PBEKeySpec(sessionKeyString.toCharArray());
  SecretKey sessionPbeKey=null;
  try {
    sessionPbeKey=keyFac.generateSecret(sessionPbeKeySpec);
  }
 catch (  InvalidKeySpecException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  try {
    pbeCipher.init(Cipher.ENCRYPT_MODE,pbeKey,pbeParamSpec);
    cipherSessionKey=pbeCipher.doFinal(sessionKeyEncoded);
  }
 catch (  IllegalBlockSizeException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  BadPaddingException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidKeyException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidAlgorithmParameterException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  try {
    pbeCipher.init(Cipher.ENCRYPT_MODE,sessionPbeKey,pbeParamSpec);
    ciphertext=pbeCipher.doFinal(plaintext.getBytes());
    status=true;
  }
 catch (  IllegalBlockSizeException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  BadPaddingException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidKeyException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
catch (  InvalidAlgorithmParameterException e) {
    Log.e(TAG,"String_Node_Str" + e.toString());
  }
  String stringCipherVersion="String_Node_Str";
  String stringCipherSessionKey=toHexString(cipherSessionKey);
  String stringCiphertext=toHexString(ciphertext);
  Log.i(TAG,"String_Node_Str" + stringCipherSessionKey.length() + "String_Node_Str"+ stringCipherSessionKey);
  StringBuilder sb=new StringBuilder(stringCipherVersion.length() + stringCipherSessionKey.length() + stringCiphertext.length());
  sb.append(stringCipherVersion);
  sb.append(stringCipherSessionKey);
  sb.append(stringCiphertext);
  return sb.toString();
}