Rare characters when decoding chain in Base64

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Rare characters when decoding chain in Base64

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Good, I've been trying for several days to pass a chain in base64 to something worthy, I explain that I've tried to see what solution I can give you.

First of all I use PHP, the string is encoded in C # with Convert.Tobase64String()

I pass the string "AAECAQcGqga5sgKsuwLTwwKZxwKixwIMS5EDogSRBv8HsgiCrQLSrgL+vAKhwgK8wwLKwwIA" by base64_decode()

I get a result like this "��K��Ү��"

Thought is so ASCII characters I perform the following procedure

$a = base64_decode($base64);
$b = array();
foreach(str_split($a) as $c)
$b[] = bindec(sprintf("%08b", ord($c)));

An array with numbers comes out but should correspond to an id in a list. Thing they do not.

The code in C # I can not apply for confidentiality reasons, but what I can say is that the content is a Byte array.

php c# array base64

asked by Francisco Manuel Gonzalez Triv 02.06.2017 в 23:25

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score 0 · Answer 1

I had this problem in PHP for some reason I did not erase those characters, modify the function to the following: Assuming your result is east:

$var = "�����������K�������Ү��������";

and we have this function:

function desencriptar($valor_encriptado) {
          $utf8 = array(
            '/[áàâãªä]/u'   =>   'a',
            '/[ÁÀÂÃÄ]/u'    =>   'A',
            '/[ÍÌÎÏ]/u'     =>   'I',
            '/[íìîï]/u'     =>   'i',
            '/[éèêë]/u'     =>   'e',
            '/[ÉÈÊË]/u'     =>   'E',
            '/[óòôõºö]/u'   =>   'o',
            '/[ÓÒÔÕÖ]/u'    =>   'O',
            '/[úùûü]/u'     =>   'u',
            '/[ÚÙÛÜ]/u'     =>   'U',
            '/ç/'           =>   'c',
            '/Ç/'           =>   'C',
            '/ñ/'           =>   'n',
            '/Ñ/'           =>   'N',
            '/–/'           =>   '-', // UTF-8 hyphen to "normal" hyphen
            '/[’‘‹›‚]/u'    =>   ' ', // Literally a single quote
            '/[“”«»„]/u'    =>   ' ', // Double quote
            '/ /'           =>   ' ', // nonbreaking space (equiv. to 0x160)
        '/[^a-zA-Z0-9-+#=\/?\'\s]/' => ''
        );
        return preg_replace(array_keys($utf8), array_values($utf8), $valor_encriptado );     
    }

We clean the variable

var_dump(desencriptar($var));