php openssl_sign()函数有什么用?
php openssl_sign()函数用于生成签名;该函数通过使用与$priv_key_id参数关联的私钥生成加密数字签名,为指定的数据输入签名。$priv_key_id是一个由openssl_get_privatekey()返回的密钥。
php openssl_sign()函数
openssl_sign - 生成签名
语法
openssl_sign( string $data , string &$signature , mixed $priv_key_id [, mixed $signature_alg = OPENSSL_ALGO_SHA1 ] )
openssl_sign() 通过使用与priv_key_id关联的私钥生成加密数字签名,为指定的数据输入签名。 请注意,数据本身未加密。
参数:
返回值
成功时返回 TRUE, 或者在失败时返回 FALSE。
示例
//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_pem, OPENSSL_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);
版本支持
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