crypt_gensalt

(PECL xpass >= 1.1.0)

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

Опис

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

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

Параметри

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.

Значення, що повертаються

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

Приклади

Приклад #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);
?>

Поданий вище приклад виведе:

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

Прогляньте також

crypt_preferred_method() - Get the prefix of the preferred hash method
crypt() - One-way string hashing
hash_equals() - Timing attack safe string comparison

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