crypt_gensalt

(PECL xpass >= 1.1.0)

crypt_gensalt — Compile a string for use as the salt argument to crypt

Descripción

crypt_gensalt(string $prefix = null, int $count = 0): ?string

Compile a string for use as the salt argument to crypt().

Parámetros

prefix: Hashing method. One of the CRYPT_PREFIX_* constant. If null, the best available hashing method will be selected.
count: Controls the processing cost of the hash; the valid range and exact meaning of count depend on the hashing method, but larger numbers correspond to more costly hashes in terms of CPU time and possibly memory usage. If count is 0, a low default cost will be selected.

Valores devueltos

Returns a string with the setting, or null in case of an error.

Ejemplos

Ejemplo #1 A crypt_gensalt() example

<?php
// Generate the salt
$salt = crypt_gensalt(CRYPT_PREFIX_BLOWFISH);
// Hash the password
$hash = crypt("secret", $salt);
// Check the hash
$test = hash_equals(crypt("secret", $hash), $hash);
var_dump($salt, $hash, $test);
?>

El resultado del ejemplo sería:

string(29) "$2y$05$GcPykP.Am8C1.dGamdpwW."
string(60) "$2y$05$GcPykP.Am8C1.dGamdpwW.1RR.7uicWvJPZfJfCEizZHqVWwuaJLm"
bool(true)

Ver también

crypt_preferred_method() - Get the prefix of the preferred hash method
crypt() - Hash de cadenas de un sólo sentido
hash_equals() - Comparación de strings segura contra ataques de temporización

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