PHP Manual
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# openssl_sign

(PHP 4 >= 4.0.4, PHP 5)

openssl_sign -- Generate signature

## Description

bool openssl_sign ( string data, string &signature, mixed priv_key_id [, int signature_alg] )

警告
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。

如果成功则返回 `TRUE`，失败则返回 `FALSE`。 If successful the signature is returned in signature.

openssl_sign() computes a signature for the specified data by using SHA1 for hashing followed by encryption using the private key associated with priv_key_id. Note that the data itself is not encrypted.

例子 1. openssl_sign() example

`<?php // $data is assumed to contain the data to be signed // fetch private key from file and ready it $fp = fopen("/src/openssl-0.9.6/demos/sign/key.pem", "r"); $priv_key = fread($fp, 8192); fclose($fp); $pkeyid = openssl_get_privatekey($priv_key); // compute signature openssl_sign($data, $signature, $pkeyid); // free the key from memory openssl_free_key($pkeyid); ?>`

See also openssl_verify().

后退 | 起点 | 前进
openssl_seal | 上一级 | openssl_verify