PHP under SSL encryption decryption, verification, signature method (very simple) _php tips

Super simple, dependent on the OpenSSL extension, here is no more nonsense, directly to the code

Signature:

function sign ($data) {
 //Read private key file
 $priKey = file_get_contents (' Key/rsa_private_key.pem ');
 
 Conversion to OpenSSL key must be a private key without pkcs8 conversion
 $res = Openssl_get_privatekey ($priKey);
 
 Call the OpenSSL built-in signature method to generate the signature $sign
 openssl_sign ($data, $sign, $res);
 
 Release of resources
 Openssl_free_key ($res);
 
 return $sign;
}

Verify:

function Verify ($data, $sign) {
 //Read Alipay public key file
 $pubKey = file_get_contents (' Key/alipay_public_key.pem ');
 
 Convert to OpenSSL format key
 $res = Openssl_get_publickey ($pubKey);
 
 Call OpenSSL built-in method verification, return bool value
 $result = (bool) openssl_verify ($data, $sign, $res);
  
 Release of resources
 Openssl_free_key ($res);
 
 return $result;

Decrypt

function Decrypt ($content) {
 
 //Read merchant private key
 $priKey = file_get_contents (' Key/rsa_private_key.pem ');
  
 Conversion to OpenSSL key must be a private key without pkcs8 conversion
 $res = Openssl_get_privatekey ($priKey);
 
 Declares the plaintext string variable
 $result = ';
 
 Loops are decrypted in 128-bit for
 ($i = 0; $i < strlen ($content)/128 $i + +) {
  $data = substr ($content, $i * 128, 128);
   
 The split length 128 string fragment is decrypted by the private key and returns the plaintext
  Openssl_private_decrypt ($data, $decrypt, $res) after $decrypt parsing;
 
 Clear-Text fragment stitching
  $result. = $decrypt;
 }
 
 Release of resources
 Openssl_free_key ($res);
 
 Returns the plaintext return
 $result;
}

I hope this article will help you learn about PHP programming.