sodium_crypto_pwhash_str

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_pwhash_str — Get an ASCII-encoded hash

说明

sodium_crypto_pwhash_str(string $password, int $opslimit, int $memlimit): string

Uses a CPU- and memory-hard hash algorithm along with a randomly-generated salt, and memory and CPU limits to generate an ASCII-encoded hash suitable for password storage.

参数

password: string; The password to generate a hash for.
opslimit: Represents a maximum amount of computations to perform. Raising this number will make the function require more CPU cycles to compute a key. There are constants available to set the operations limit to appropriate values depending on intended use, in order of strength: SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE, SODIUM_CRYPTO_PWHASH_OPSLIMIT_MODERATE and SODIUM_CRYPTO_PWHASH_OPSLIMIT_SENSITIVE.
memlimit: The maximum amount of RAM that the function will use, in bytes. There are constants to help you choose an appropriate value, in order of size: SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE, SODIUM_CRYPTO_PWHASH_MEMLIMIT_MODERATE, and SODIUM_CRYPTO_PWHASH_MEMLIMIT_SENSITIVE. Typically these should be paired with the matching opslimit values.

返回值

Returns the hashed password.

In order to produce the same password hash from the same password, the same values for opslimit and memlimit must be used. These are embedded within the generated hash, so everything that's needed to verify the hash is included. This allows the sodium_crypto_pwhash_str_verify() function to verify the hash without needing separate storage for the other parameters.

范例

示例 #1 sodium_crypto_pwhash_str() example


<?php
$password = 'password';
echo sodium_crypto_pwhash_str(
    $password,
    SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE,
    SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE
);

以上例程的输出类似于：

$argon2id$v=19$m=65536,t=2,p=1$oWIfdaXwWwhVmovOBc2NAQ$EbsZ+JnZyyavkafS0hoc4HdaOB0ILWZESAZ7kVGa+Iw

注释

注意:
Hashes are calculated using the Argon2ID algorithm, providing resistance to both GPU and side-channel attacks. In contrast to the password_hash() function, there is no salt parameter (a salt is generated automatically), and the opslimit and memlimit parameters are not optional.

参见

sodium_crypto_pwhash_str_verify() - Verifies that a password matches a hash
sodium_crypto_pwhash() - Derive a key from a password, using Argon2
password_hash() - 创建密码的散列（hash）
password_verify() - 验证密码是否和散列值匹配
» Libsodium Argon2 docs

add a note

User Contributed Notes 1 note

down

marcus at synchromedia dot co dot uk ¶

1 year ago


If you want to ensure that the hashes you generate with sodium_crypto_pwhash_str are compatible with those generated by password_hash, you need to keep an eye on that memory setting. According to the docs, the password_hash memory_cost param is given in "kibibytes", whereas sodium_crypto_pwhash_str uses bytes. I did some experiments to see what the difference is and ran into this:

echo password_hash('password',
                   PASSWORD_ARGON2ID,
                   [
                       'memory_cost' => 15000,
                       'time_cost'   => 26,
                       'threads'     => 1,
                   ];

echo sodium_crypto_pwhash_str(
        'password', 26,
        15000000);

These result in:
$argon2id$v=19$m=15000,t=26,p=1$VG5MSkhUdEdFaGwyVG5sWA$laRHogIVAnC4ggLI8RdCDWlITTdicrdq0tK6SHGf4CI
$argon2id$v=19$m=14648,t=26,p=1$ClQ37/z9u7K6V1C2bkD4QA$51m8KhQQ9gujFSF+JyQR9d5QesayJiKsFmDU4HnGBHg

Notice that the "m=" numbers are different, and also different from what we asked for. It's down to the "kibibytes" unit. If we multiply the 15000 we used for password_hash by 1,024 instead of 1,000, we get 15,360,000, and using that number gives us the expected hash params:

echo sodium_crypto_pwhash_str(
        'password', 26,
        15360000);

$argon2id$v=19$m=15000,t=26,p=1$Qz3pWktOvT6X/LvdAk0bgQ$KosSFPfHUtWg+ppyRs3Op5/zIV6F6iy2Q7Gom8wP29c

This should be compatible with password_hash.

Incidentally the numbers I'm using for the Argon2id hash params are taken from the OWASP password guide, which recommend values different from PHP's default: https://cheatsheetseries.owasp.org/cheatsheets/Password_Storage_Cheat_Sheet.html#argon2id

add a note

官方地址：https://www.php.net/manual/en/function.sodium-crypto-pwhash-str.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络 JAVA NoSQL 数据库面试 C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet ADORecordSet对象 adodb手册 PHP 8.1 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 opcache预加载 Composer的Packagist资源 mysql面试题 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP7添加redis扩展 PHP mkdir()写出来的权限与mode值不符合 Packagist / Composer 中国全量镜像 php中几种注释规范利用php soap实现web service PHP获取指定函数定义在哪个文件中及行号

略微加速

PHP官方手册 - 互联网笔记

sodium_crypto_pwhash_str

说明

参数

返回值

范例

注释

参见

User Contributed Notes 1 note