//生成 sha256WithRSA 签名
function getSign($content, $privateKey){
$privateKey = "-----BEGIN RSA PRIVATE KEY-----\n" .
wordwrap($privateKey, 64, "\n", true) .
"\n-----END RSA PRIVATE KEY-----";
$key = openssl_get_privatekey($privateKey);
openssl_sign($content, $signature, $key, "SHA256");
openssl_free_key($key);
$sign = base64_encode($signature);
return $sign;
}
//验证 sha256WithRSA 签名
function verify($content, $sign, $publicKey){
$publicKey = "-----BEGIN PUBLIC KEY-----\n" .
wordwrap($publicKey, 64, "\n", true) .
"\n-----END PUBLIC KEY-----";
$key = openssl_get_publickey($publicKey);
$ok = openssl_verify($content,base64_decode($sign), $key, 'SHA256');
openssl_free_key($key);
return $ok;
}
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