checks if the string is base64 encoded . concode_field_sep boolean isFileSystemEncrypted concode_elem_sep String PREFER_CIPHER_TRANSFORMATION concode_elem_sep String bestCipherAvailable concode_elem_sep String TAG concode_elem_sep String UTF8 concode_elem_sep String MAC_TRANSFORMATION concode_field_sep boolean init concode_elem_sep byte[] generateInitVector concode_elem_sep String encrypt concode_elem_sep byte[] encrypt concode_elem_sep boolean isFileSystemEncrypted concode_elem_sep String removeNewLine concode_elem_sep String decrypt concode_elem_sep byte[] decrypt concode_elem_sep Cipher getBestCipher concode_elem_sep String hash
boolean function ( String arg0 ) { try { Base64 . decode ( arg0 , Base64 . DEFAULT ) ; return true ; } catch ( IllegalArgumentException loc0 ) { return false ; } }