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copied!<p>The problem is with SecureRandom generation. It is giving different results on different platforms. It's because of a bug fix on line 320 (in Gingerbread source) of SHA1PRNG_SecureRandomImpl.java in the engineNextBytes() method where</p> <pre><code>bits = seedLength << 3 + 64; </code></pre> <p>was changed to</p> <pre><code>bits = (seedLength << 3) + 64; </code></pre> <p>Use SecretKeyFactory() to generate a Secure key instead of secure random.</p> <pre><code>public class Crypto { Cipher ecipher; Cipher dcipher; byte[] salt = { 1, 2, 4, 5, 7, 8, 3, 6 }; int iterationCount = 1979; Crypto(String passPhase) { try { // Create the key KeySpec keySpec = new PBEKeySpec(passPhase.toCharArray(), salt, iterationCount); SecretKey key = SecretKeyFactory.getInstance("PBEWITHSHA256AND128BITAES-CBC-BC").generateSecret(keySpec); ecipher = Cipher.getInstance(key.getAlgorithm()); dcipher = Cipher.getInstance(key.getAlgorithm()); AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount); ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec); dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec); } catch (Exception e) { // TODO: handle exception //Toast.makeText(this, "I cought ", Toast.LENGTH_LONG).show(); } } public String encrypt(String str) { String rVal; try { byte[] utf8 = str.getBytes("UTF8"); byte[] enc = ecipher.doFinal(utf8); rVal = toHex(enc); } catch (Exception e) { // TODO: handle exception rVal = "Exception Caught "+e.getMessage(); } return rVal; } public String decrypt(String str) { String rVal; try { byte[] dec = toByte(str); byte[] utf8 = dcipher.doFinal(dec); rVal = new String(utf8, "UTF8"); } catch(Exception e) { rVal = "Error in decrypting :"+e.getMessage(); } return rVal; } private static byte[] toByte(String hexString ) { int len = hexString.length()/2; byte[] result = new byte[len]; for ( int i=0; i<len; i++ ) { result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16 ).byteValue(); } return result; } private static String toHex(byte[] buf) { if (buf == null) return ""; StringBuffer result = new StringBuffer( 2*buf.length); for ( int i=0; i<buf.length; i++) { appendHex(result, buf[i]); } return result.toString(); } private final static String HEX = "0123456789ABCDEF"; private static void appendHex(StringBuffer sb, byte b) { sb.append(HEX.charAt((b >> 4) & 0x0f)).append(HEX.charAt(b & 0x0f)); } } </code></pre>

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