Detailed explanation of how PHP uses openssl encryption and decryption examples

Summary: php uses openssl encryption and decryption

Referenced other people’s articles and made notes myself

①Preparation
Find php.ini and remove the ';' in front of openssl.dll.
Find the location of openssl.cnf, mine is in D:\xampp\apache\conf.
Configure apache to support SSL: Open apache's configuration file conf/httpd.conf
LoadModule ssl_module modules/mod_ssl.so, Include conf/extra/httpd-ssl.conf
Remove the ## in front of the two lines ##Pay attention to modifying two fields in the httpd-ssl.conf file:
SSLCertificateFile "C:/Apache2.2/conf/server.crt"
SSLCertificateKeyFile "C:/Apache2.2/conf/server. key"

② Code

<?php $config = array(    "private_key_bits" => 1024,                     //字节数    512 1024  2048   4096 等
    "private_key_type" => OPENSSL_KEYTYPE_RSA,     //加密类型
    "config" => "D:/xampp/apache/conf/openssl.cnf");
    $privkeypass = '123456789'; //私钥密码
    $numberofdays = 365;     //有效时长
    $cerpath = "./test.cer"; //生成证书路径
    $pfxpath = "./test.pfx"; //密钥文件路径
    $dn = array(    "countryName" => "UK",    "stateOrProvinceName" => "Somerset",    "localityName" => "Glastonbury",    "organizationName" => "The Brain Room Limited",    "organizationalUnitName" => "PHP Documentation Team",    "commonName" => "Wez Furlong",    "emailAddress" => "wez@example.com");// 生成公钥私钥资源$res = openssl_pkey_new($config);// 导出私钥 
$priKeyopenssl_pkey_export($res, $priKey,null,$config);//  导出公钥 
$pubKey$pubKey = openssl_pkey_get_details($res);
$pubKey = $pubKey["key"];
//print_r($priKey); 私钥
//print_r($pubKey); 公钥
//直接测试私钥 公钥
$data = '直接测试成功!';// 加密
openssl_public_encrypt($data, $encrypted, $pubKey);// 解密
openssl_private_decrypt($encrypted, $decrypted, $priKey);
echo $decrypted;//生成文件
$csr = openssl_csr_new($dn, $priKey,$config); //基于$dn生成新的 CSR （证书签名请求）
$sscert = openssl_csr_sign($csr, null, $priKey, 365,$config);//根据配置对证书进行签名
openssl_x509_export($sscert, $csrkey); //将公钥 证书存储到一个文件$sscert，由 PEM 编码格式命名。
openssl_pkcs12_export($sscert, $privatekey, $priKey, $privkeypass); //将私钥存储到名为的出 PKCS12 文件格式的字符串。 导出密钥$privatekey//生成证书文件$fp = fopen($cerpath, "w");
fwrite($fp, $csrkey);
fclose($fp);//生成密钥文件$fp = fopen($pfxpath, "w");
fwrite($fp, $privatekey);
fclose($fp);// 测试私钥 秘钥
$privkeypass = '123456789'; //私钥密码
$pfxpath = "./test.pfx"; //密钥文件路径
$priv_key = file_get_contents($pfxpath); //获取密钥文件内容
$data = "测试数据！"; 
//加密数据测试test
//私钥加密
openssl_pkcs12_read($priv_key, $certs, $privkeypass); //读取公钥、私钥
$prikeyid = $certs['pkey']; //私钥
openssl_sign($data, $signMsg, $prikeyid,OPENSSL_ALGO_SHA1); //注册生成加密信息
$signMsg = base64_encode($signMsg); //base64转码加密信息
//公钥解密
$unsignMsg=base64_decode($signMsg);//base64解码加密信息
openssl_pkcs12_read($priv_key, $certs, $privkeypass); //读取公钥、私钥
$pubkeyid = $certs['cert']; //公钥
$res = openssl_verify($data, $unsignMsg, $pubkeyid); //验证
echo $res?'证书测试成功！':'证书测试失败！';; //输出验证结果，1：验证成功，0：验证失败

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