PHP uses openssl_verify to verify signature example program_PHP tutorial

Let’s take a look at the example program for using openssl_verify to verify signatures in PHP. I hope this article will be helpful to all students.

The code is as follows

代码如下

复制代码

/** * 验证签名 * TobeVerified 待验证签名的密文 * PlainText 待验证签名的明文 * CertFile 签名者公钥证书 * return 验证成功返回true，失败返回false(从LastErrMsg属性获取失败原因) */ function VerifyMsg($TobeVerified, $PlainText, $CertFile,$signature_alg=OPENSSL_ALGO_SHA1) { //用公钥验签 $fp=fopen($CertFile,"r"); if(!$fp) { //echo "Error Number:-10005, Error Description: ER_FIND_CERT_FAILED（找不到证书）"; return false; } $pub_key=fread($fp,8192); fclose($fp); $res = openssl_get_publickey($pub_key); if (1==openssl_verify($PlainText,pack("H" . strlen($TobeVerified), $TobeVerified) , $res,$signature_alg)) { //print("www.bKjia.c0m提示您：验证成功"." ");         return true;     }     else     {         //echo "Error Number:-10021, Error Description: ER_VERIFY_ERROR（验签失败）|".openssl_error_string();         return false;     }   }   ?>

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/**

* Verify signature

* TobeVerified The ciphertext of the signature to be verified

* PlainText The plain text of the signature to be verified

* CertFile signer public key certificate

* return Returns true if the verification is successful, false if failed (get the failure reason from the LastErrMsg attribute)

*/
function VerifyMsg($TobeVerified, $PlainText, $CertFile,$signature_alg=OPENSSL_ALGO_SHA1)
{

​
//Verify signature using public key
$fp=fopen($CertFile,"r");
If(!$fp)
{
                                 
//echo "Error Number:-10005, Error Description: ER_FIND_CERT_FAILED (Certificate not found)";
         return false;
}  
$pub_key=fread($fp,8192);
fclose($fp);
$res = openssl_get_publickey($pub_key);
If (1==openssl_verify($PlainText,pack("H" . strlen($TobeVerified), $TobeVerified) , $res,$signature_alg))
{
                                 
//print("www.bKjia.c0m prompts you: Verification successful."
");
         return true;
}  
else
{
                                 
//echo "Error Number:-10021, Error Description: ER_VERIFY_ERROR (signature verification failed)|".openssl_error_string();
         return false;
}  

}

?>

openssl_verify may have three return values ​​1, 0, -1. Only returning 1 indicates that the signature verification is successful.

$signature_alg defaults to OPENSSL_ALGO_SHA1. If it is DSA encryption, set it to OPENSSL_ALGO_DSS1 http://www.bkjia.com/PHPjc/632817.htmlwww.bkjia.comtrue

http: //www.bkjia.com/PHPjc/632817.html

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Let’s take a look at the example program for using openssl_verify to verify signatures in PHP. I hope this article will be useful to all students. help. The code is as follows Copy code ?php /** * Verify signature...