# sodium_crypto_core_ristretto255_from_hash

(PHP 8 >= 8.1.0)

sodium_crypto_core_ristretto255_from_hash — Maps a vector

### 说明

sodium_crypto_core_ristretto255_from_hash(string `$s`): string

Maps a 64-bytes vector `s` to a group element. Available as of libsodium 1.0.18.

警告

本函数还未编写文档，仅有参数列表。

### 参数

`s`

  A 64-bytes vector.

### 返回值

Returns a 32-byte random string.

### 示例

示例 #1 sodium_crypto_core_ristretto255_from_hash() example

`<?php
$hashes = sodium_hex2bin(
'5d1be09e3d0c82fc538112490e35701979d99e06ca3e2b5b54bffe8b4dc772c1' .
'4d98b696a1bbfb5ca32c436cc61c16563790306c79eaca7705668b47dffe5bb6'
);
var_dump(sodium_bin2hex(sodium_crypto_core_ristretto255_from_hash($hashes)));
?>`

以上示例会输出：

    string(64) "3066f82a1a747d45120d1740f14358531a8f04bbffe6a819f86dfe50f44a0a46"

### 参见

- sodium_hex2bin() - Decodes a hexadecimally encoded binary string
- sodium_bin2hex() - Encode to hexadecimal
- sodium_crypto_core_ristretto255_from_hash()

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