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Groups > comp.lang.php > #10291
| Date | 2013-07-28 21:16 +0200 |
|---|---|
| From | Luuk <luuk@invalid.lan> |
| Newsgroups | comp.lang.php, comp.datbase.mysql |
| Subject | Re: is mysqli_real_escape_string bullet proof with binary data? |
| References | (6 earlier) <kt1lk6$s80$1@dont-email.me> <isgfca-6kg.ln1@luuk.invalid.lan> <kt36ib$4g8$2@dont-email.me> <1ppfca-lqi.ln1@luuk.invalid.lan> <kt3pl9$gap$2@dont-email.me> |
| Message-ID | <097gca-1mo.ln1@luuk.invalid.lan> (permalink) |
Cross-posted to 2 groups.
On 28-07-2013 21:05, Jerry Stuckle wrote:
> On 7/28/2013 11:25 AM, Luuk wrote:
>> On 28-07-2013 15:39, Jerry Stuckle wrote:
>>> On 7/28/2013 8:54 AM, Luuk wrote:
>>>>>>> ..and hope that the file 'upArrow.png' does not contain a ['] or
>>>>>>> three?
>>>>>>>
>>>>>>
>>>>>> luuk@opensuse:~/public_html/temp> grep "'" upArrow.png
>>>>>> Binary file upArrow.png matches
>>>>>>
>>>>>> luuk@opensuse:~/public_html/temp> hexdump -C upArrow.png | grep "'"
>>>>>> 00000110 53 00 a0 04 00 60 cb 63 62 e3 00 50 2d 00 60 27
>>>>>> |S....`.cb..P-.`'|
>>>>>> 00000260 00 b0 6a 3e 01 7b 91 2d a8 5d 63 03 f6 4b 27 10
>>>>>> |..j>.{.-.]c..K'.|
>>>>>> 000003a0 51 c2 27 22 93 a8 4b b4 26 ba 11 f9 c4 18 62 32
>>>>>> |Q.'"..K.&.....b2|
>>>>>> 000003c0 37 24 12 89 43 32 27 b9 90 02 49 b1 a4 54 d2 12
>>>>>> |7$..C2'...I..T..|
>>>>>> 00000530 fb 81 0e 41 c7 4a 27 5c 27 47 67 8f ce 05 9d e7
>>>>>> |...A.J'\'Gg.....|
>>>>>> 00000720 0e 85 50 7e e8 d6 d0 07 61 e6 61 8b c3 7e 0c 27
>>>>>> |..P~....a.a..~.'|
>>>>>> 000007c0 91 bc 35 79 24 c5 33 a5 2c e5 b9 84 27 a9 90 bc
>>>>>> |..5y$.3.,...'...|
>>>>>> 000009e0 dd bd f3 7a 6f f7 c5 f7 f5 df 16 dd 7e 72 27 fd
>>>>>> |...zo.......~r'.|
>>>>>> 000009f0 ce cb bb d9 77 27 ee ad bc 4f bc 5f f4 40 ed 41
>>>>>> |....w'...O._.@.A|
>>>>>>
>>>>>>
>>>
>>> It doesn't make any difference. The png could contain one or more
>>> delimiters, i.e. an apostrophe, which will cause a syntax error in a
>>> non-prepared statement.
>>
>> It DOES contain single-quotes (that is an apostophe?).
>> and that DOES NOT cause a syntax error,
>> because i'm using a prepared statement.
>>
>>>
>>> Escaping strings is not just to prevent security leeks - it is also to
>>> ensure valid SQL.
>>>
>>
>> I dont see any errors in the query.log or error.log of my MySQL
>> installation (about updating this `testpng`-table).
>> Therefore i dont see a point in ensuring validity of an already valid
>> SQL.
>>
>> Can you give an example an file that would break my script?
>> The script is here: http://pastebin.com/5D8ZGEhy
>> My emailadress is: luuk34@gmail.com
>>
>> I think i have shown that this script is working OK, and that there is
>> no reason to do something with escaping string here.
>>
>
> You're not reading my replies, Luuk. I said if it contains delimiters
> and YOU ARE NOT USING PREPARED STATEMENTS. For instance:
>
> "INSERT INTO MyTABLE (bin_column) VALUES ('$png_data');
>
> Prepared statements are good for some things - but you have to also be
> aware of the additional processing required when you use them.
>
>
From my code (at: http://pastebin.com/5D8ZGEhy):
$stmt = $link->prepare("INSERT INTO testpng (image) VALUES (?)");
$file = file_get_contents('upArrow.png');
echo "Size before: ".strlen($file)."<br>\n";
$stmt->bind_param('s', $file);
Is above not a prepared statment?
Back to comp.lang.php | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
is mysqli_real_escape_string bullet proof with binary data? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-27 10:31 +0100
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-27 11:45 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-27 12:08 +0100
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-27 15:28 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-27 15:36 +0100
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-27 17:22 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-27 17:34 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 19:44 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-28 14:54 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? "J.O. Aho" <user@example.net> - 2013-07-28 15:35 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-28 09:39 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-28 17:25 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-28 15:05 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-28 21:16 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-28 20:46 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2013-07-29 09:17 -0700
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-29 14:01 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-30 00:04 +0100
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-29 21:02 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-29 20:34 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 09:52 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-27 15:58 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 10:36 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 10:43 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Norman Peelman <npeelman@cfl.rr.com> - 2013-07-27 09:35 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 09:56 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Norman Peelman <npeelman@cfl.rr.com> - 2013-07-27 20:01 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? The Natural Philosopher <tnp@invalid.invalid> - 2013-07-27 15:33 +0100
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-27 09:57 -0400
I've always used GD, but never been 100% happy with it (Was: is mysqli_real_escape_string bullet proof with binary data?) "J.O. Aho" <user@example.net> - 2013-07-27 18:09 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Luuk <luuk@invalid.lan> - 2013-07-29 20:37 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? "J.O. Aho" <user@example.net> - 2013-07-30 07:31 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-30 02:08 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? Scott Johnson <noonehome@chalupasworld.com> - 2013-07-30 05:35 -0700
Re: is mysqli_real_escape_string bullet proof with binary data? "J.O. Aho" <user@example.net> - 2013-07-30 17:53 +0200
Re: is mysqli_real_escape_string bullet proof with binary data? Jerry Stuckle <jstucklex@attglobal.net> - 2013-07-30 12:37 -0400
Re: is mysqli_real_escape_string bullet proof with binary data? tony@mountifield.org (Tony Mountifield) - 2013-07-30 09:35 +0000
Re: is mysqli_real_escape_string bullet proof with binary data? Denis McMahon <denismfmcmahon@gmail.com> - 2013-07-31 04:56 +0000
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