mhash_keygen_s2k

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

mhash_keygen_s2k — Generates a key

说明

mhash_keygen_s2k ( int $hash , string $password , string $salt , int $bytes ) : string

Generates a key according to the given hash, using an user provided password.

This is the Salted S2K algorithm as specified in the OpenPGP document (» RFC 2440).

Keep in mind that user supplied passwords are not really suitable to be used as keys in cryptographic algorithms, since users normally choose keys they can write on keyboard. These passwords use only 6 to 7 bits per character (or less). It is highly recommended to use some kind of transformation (like this function) to the user supplied key.

参数

hash: The hash ID used to create the key. One of the MHASH_hashname constants.
password: An user supplied password.
salt: Must be different and random enough for every key you generate in order to create different keys. Because salt must be known when you check the keys, it is a good idea to append the key to it. Salt has a fixed length of 8 bytes and will be padded with zeros if you supply less bytes.
bytes: The key length, in bytes.

返回值

Returns the generated key as a string, or FALSE on error.

php apc 函数检查apc中是否存在某个或者某些key php gnupg 函数 add a key for encryption php gnupg 函数 add a key for signing php mcve 函数 set certificate key files and certificates if server requires client certificate verification php mhash 函数 generates a key php ncurses 函数 check for presence of a function key on terminal keyboard php ncurses 函数 enables/disable 8 bit meta key information php ncurses 函数 returns current soft label key attribute php csprng 函数 generates cryptographically secure pseudo random bytes php sodium 函数 randomly generate a secret key and a corresponding public key php sodium 函数 get random bytes for key php sodium 函数 compute a shared secret given a user s secret key and another user s public key php sodium 函数 get random bytes for key php sodium 函数 randomly generate a secret key and a corresponding public key php sodium 函数 extract the public key from the secret key php statistic 函数 generates a random deviate from the exponential distribution php statistic 函数 generates a random deviate from the f distribution php statistic 函数 generates uniform float between low exclusive and high exclusive php statistic 函数 generates a random floating point number between 0 and 1 php wincache 函数 decrements the value associated with the key