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Php mhash keygen s2k () function

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(PHP 4 >= 4.0.4, PHP 5)

mhash_keygen_s2k -- Generates a key

Syntax

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

mhash_keygen_s2k() generates a key that is bytes long, from a user given password. This is the Salted S2K algorithm as specified in the OpenPGP document (RFC 2440). That algorithm will use the specified hash algorithm to create the key. The salt must be different and random enough for every key you generate in order to create different keys. That salt must be known when you check the keys, thus 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.

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.

Php mhash keygen s2k Function syntax tag

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Php mhash keygen s2k syntax tutorial

php tutorial guide and code design are for easy learning and programming. The code practice section provided at the top is for practising of this syntax. Use the code section up to practice your php programming online. Learning php is very easy, all you need is to use the examples on this site and practice them to perfect your skills.


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