PHP 如何在开始会话之前计算会话 ID 的长度 [英] PHP How can I calculate length of Session ID before starting session
问题描述
如何根据 php.ini 值计算 PHP 会话 ID 的长度 session.hash_function 和 session.hash_bits_per_character，并在开始会话之前.
How can I calculate length of PHP session id, based on php.ini values session.hash_function and session.hash_bits_per_character, and before starting the session.
我想在开始会话之前创建和分配自定义会话 ID，如 session_id($customSessionId);.
I want to create and assign custom session id like session_id($customSessionId);, before starting session.
在我的本地机器中，session.hash_function 的值为 0(MD5 的可能值为0"，SHA-1 的可能值为1")和 session.hash_bits_per_character 的值code> 为 5(可能的值为 '4' [0-9, af]、'5' [0-9, av] 和 '6' [0-9, az, AZ, "-", ","])，会话 id 的结果长度为 26.
In my local machine value of session.hash_function is 0 (possible values are '0' for MD5 and '1' for SHA-1) and value of session.hash_bits_per_character is 5 (possible values are '4' [0-9, a-f], '5' [0-9, a-v], and '6' [0-9, a-z, A-Z, "-", ","]), and the resulting length of session id is 26.
当session.hash_function和session.hash_bits_per_character有另一组值时，session id的长度是多少，可以在开始会话之前计算?
What will be the length of session id when session.hash_function and session.hash_bits_per_character have another set of values, which can be calculated before starting session?
我想通过分析默认会话设置来计算不同服务器(本地、暂存或生产)上不同长度的会话 ID.
I want to calculate session ids with different length on different servers (local, staging or production), and by analyzing default session settings.
启动会话和计算会话 ID 非常简单.但我想对代码进行编码:
Starting the session and calculating session id is pretty much simpler. But i want to code the code something like:
// $length = {code to get length from hash_function and hash_bits_per_character}
// this is my custom function to generate new session id having length $length
$myCustomSessionId = generateCustomSessionId($length);
// assign my custom session id
session_id($myCustomSessionId);
//and finally start the session :)
session_start();
推荐答案
这里是 5.3 的所有会话哈希算法.如果您想在自己的服务器上试用，请使用底部的代码
Here are all of the session hash algorithms for 5.3. Use my code at the bottom if you want to try it out on your own server
algo bits length
md2 4 32
md2 5 26
md2 6 22
md4 4 32
md4 5 26
md4 6 22
md5 4 32
md5 5 26
md5 6 22
sha1 4 40
sha1 5 32
sha1 6 27
sha224 4 56
sha224 5 45
sha224 6 38
sha256 4 64
sha256 5 52
sha256 6 43
sha384 4 96
sha384 5 77
sha384 6 64
sha512 4 128
sha512 5 103
sha512 6 86
ripemd128 4 32
ripemd128 5 26
ripemd128 6 22
ripemd160 4 40
ripemd160 5 32
ripemd160 6 27
ripemd256 4 64
ripemd256 5 52
ripemd256 6 43
ripemd320 4 80
ripemd320 5 64
ripemd320 6 54
whirlpool 4 128
whirlpool 5 103
whirlpool 6 86
tiger128,3 4 32
tiger128,3 5 26
tiger128,3 6 22
tiger160,3 4 40
tiger160,3 5 32
tiger160,3 6 27
tiger192,3 4 48
tiger192,3 5 39
tiger192,3 6 32
tiger128,4 4 32
tiger128,4 5 26
tiger128,4 6 22
tiger160,4 4 40
tiger160,4 5 32
tiger160,4 6 27
tiger192,4 4 48
tiger192,4 5 39
tiger192,4 6 32
snefru 4 64
snefru 5 52
snefru 6 43
snefru256 4 64
snefru256 5 52
snefru256 6 43
gost 4 64
gost 5 52
gost 6 43
adler32 4 8
adler32 5 7
adler32 6 6
crc32 4 8
crc32 5 7
crc32 6 6
crc32b 4 8
crc32b 5 7
crc32b 6 6
salsa10 4 128
salsa10 5 103
salsa10 6 86
salsa20 4 128
salsa20 5 103
salsa20 6 86
haval128,3 4 32
haval128,3 5 26
haval128,3 6 22
haval160,3 4 40
haval160,3 5 32
haval160,3 6 27
haval192,3 4 48
haval192,3 5 39
haval192,3 6 32
haval224,3 4 56
haval224,3 5 45
haval224,3 6 38
haval256,3 4 64
haval256,3 5 52
haval256,3 6 43
haval128,4 4 32
haval128,4 5 26
haval128,4 6 22
haval160,4 4 40
haval160,4 5 32
haval160,4 6 27
haval192,4 4 48
haval192,4 5 39
haval192,4 6 32
haval224,4 4 56
haval224,4 5 45
haval224,4 6 38
haval256,4 4 64
haval256,4 5 52
haval256,4 6 43
haval128,5 4 32
haval128,5 5 26
haval128,5 6 22
haval160,5 4 40
haval160,5 5 32
haval160,5 6 27
haval192,5 4 48
haval192,5 5 39
haval192,5 6 32
haval224,5 4 56
haval224,5 5 45
haval224,5 6 38
haval256,5 4 64
haval256,5 5 52
haval256,5 6 43
这是我用来生成它们的代码:
Here is the code I used to generate them:
session_start();
$algos = hash_algos();
foreach ($algos as $key => $algo) {
ini_set('session.hash_function', $algo);
for ($i = 4; $i <= 6; $i++) {
ini_set('session.hash_bits_per_character', $i);
session_regenerate_id();
echo $algo . ' - ' . $i . ' - ' . strlen(session_id()) . '<br>';
}
}
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