PHP uses OpenSSL to generate signature instance programs

Instance

The code is as follows

<?php      /**        * Generate signature content based on original text       *        * @param string $data original content       *        * @return String       */ function sign ($strData)     {  $filePath = ' test.pfx '; if (!file_exists ($filePath)) { return false;         }     $PKCS = file_get_contents ($filePath); if (Openssl_pkcs12_read ($PKCS, $certs, ')) { $privateKey = $certs [' Pkey ']; $publicKey = $certs [' cert ']; $SIGNEDMSG = ""; if (openssl_sign ($strData, $SIGNEDMSG, $privateKey)) { $signedMsg =bin2hex ($SIGNEDMSG); return $SIGNEDMSG; } else { return ";             }  } else { return ' 0 ';         }      }       /*          Openssl_pkcs12_read can read the private key in the PFX format without needing to convert to a file in PEM format      */ ?>

Openssl_sign default Signature_alg parameter is OPENSSL_ALGO_SHA1

If you use DSA encryption you need to use the OPENSSL_ALGO_DSS1 parameter

Signature_alg Other parameters

Openssl_algo_dss1 (integer)

OPENSSL_ALGO_SHA1 (integer)

openssl_algo_sha224 (integer)

openssl_algo_sha256 (integer)

openssl_algo_sha384 (integer)

openssl_algo_sha512 (integer)

openssl_algo_rmd160 (integer)

OPENSSL_ALGO_MD5 (integer)

OPENSSL_ALGO_MD4 (integer)

OPENSSL_ALGO_MD2 (integer)