Rechercher une fonction PHP

openssl_sign

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

openssl_signGenerate signature

Description

openssl_sign ( string $data , string &$signature , mixed $priv_key_id [, mixed $signature_alg = OPENSSL_ALGO_SHA1 ] ) : bool

openssl_sign() computes a signature for the specified data by generating a cryptographic digital signature using the private key associated with priv_key_id. Note that the data itself is not encrypted.

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Parameters

data

The string of data you wish to sign

signature

If the call was successful the signature is returned in signature.

priv_key_id

resource - a key, returned by openssl_get_privatekey()

string - a PEM formatted key

signature_alg

int - one of these Signature Algorithms.

string - a valid string returned by openssl_get_md_methods() example, "sha256WithRSAEncryption" or "sha384".

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Return Values

Returns TRUE on success or FALSE on failure.

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Examples

Example #1 openssl_sign() example

<?php
// $data is assumed to contain the data to be signed

// fetch private key from file and ready it
$pkeyid openssl_pkey_get_private("file://src/openssl-0.9.6/demos/sign/key.pem");

// compute signature
openssl_sign($data$signature$pkeyid);

// free the key from memory
openssl_free_key($pkeyid);
?>

Example #2 openssl_sign() example

<?php
//data you want to sign
$data 'my data';

//create new private and public key
$new_key_pair openssl_pkey_new(array(
    
"private_key_bits" => 2048,
    
"private_key_type" => OPENSSL_KEYTYPE_RSA,
));
openssl_pkey_export($new_key_pair$private_key_pem);

$details openssl_pkey_get_details($new_key_pair);
$public_key_pem $details['key'];

//create signature
openssl_sign($data$signature$private_key_pemOPENSSL_ALGO_SHA256);

//save for later
file_put_contents('private_key.pem'$private_key_pem);
file_put_contents('public_key.pem'$public_key_pem);
file_put_contents('signature.dat'$signature);

//verify signature
$r openssl_verify($data$signature$public_key_pem"sha256WithRSAEncryption");
var_dump($r);
?>

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-openssl-sign.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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