PHP rsa encryption, decryption, signature, signature verification public key example code detailed explanation

php rsa encryption, decryption, signature, signature verification

Because the third-party organization uses the Java version of rsa encryption and decryption method, I just started to search a lot of PHP on the Internet version of rsa encryption and decryption, but most of them are not suitable for docking with java.

The following php versions are suitable for docking with the java interface. The Java-applicable key needs to be added when using the php language.

-----BEGIN CERTIFICATE-----
 
-----END CERTIFICATE----- 　　

Use key:
Encryption public key public_key.cer

Decrypt private key private_key.key

Sign private key sign_key.key

Verify public key verify.cer

<?php
class RSAUtils{
  //加密公钥
  function redPukey()
  {    
    //拼接加密公钥路径
    $encryptionKeyPath="D:/encryptions.cer";   
    $encryptionKey4Server = file_get_contents($encryptionKeyPath);

    $pem = chunk_split(base64_encode($encryptionKey4Server),64,"\n");//转换为pem格式的公钥
    $pem = "-----BEGIN CERTIFICATE-----\n".$pem."-----END CERTIFICATE-----\n";
    $publicKey = openssl_pkey_get_public($pem);
    return $publicKey;
  }
  
  //解密私钥
  function redPikey()
  {    
    //拼接解密私钥路径
    $decryptKeyPath="D:/decrypts.key";   
    $decryptKey4Server = file_get_contents($decryptKeyPath);

    $pem = chunk_split($decryptKey4Server,64,"\n");//转换为pem格式的私钥
    $pem = "-----BEGIN PRIVATE KEY-----\n".$pem."-----END PRIVATE KEY-----\n";
    $privateKey = openssl_pkey_get_private($pem);
    return $privateKey;
  }
  
  //签名私钥
  function redSignkey()
  {    
    //拼接签名路径
    $signKeyPath="D:/DEMO/sign.key";
    $signKey4Server = file_get_contents($signKeyPath);

    $pem = chunk_split($signKey4Server,64,"\n");//转换为pem格式的私钥
    $pem = "-----BEGIN PRIVATE KEY-----\n".$pem."-----END PRIVATE KEY-----\n";
    $signKey = openssl_pkey_get_private($pem);
    return $signKey;
  }
  
  //验签公钥
  function redVerifykey()
  {    
    //拼接验签路径
    $verifyKeyPath="D:/DEMO/verify.cer";  
    $verifyKey4Server = file_get_contents($verifyKeyPath);

    $pem = chunk_split(base64_encode($verifyKey4Server),64,"\n");//转换为pem格式的公钥
    $pem = "-----BEGIN CERTIFICATE-----\n".$pem."-----END CERTIFICATE-----\n";
    $verifyKey = openssl_pkey_get_public($pem);
    return $verifyKey;
  }
  
  //公钥加密
  function pubkeyEncrypt($source_data, $pu_key) {
    $data = "";
    $dataArray = str_split($source_data, 117);
    foreach ($dataArray as $value) {
      $encryptedTemp = ""; 
      openssl_public_encrypt($value,$encryptedTemp,$pu_key);//公钥加密
      $data .= base64_encode($encryptedTemp);
    }
    return $data;
  }
  
  //私钥解密
  function pikeyDecrypt($eccryptData,$decryptKey) {
    $decrypted = "";
    $decodeStr = base64_decode($eccryptData);
    $enArray = str_split($decodeStr, 256);

    foreach ($enArray as $va) {
      openssl_private_decrypt($va,$decryptedTemp,$decryptKey);//私钥解密
      $decrypted .= $decryptedTemp;
    }
    return $decrypted;
  }
  
 
}
?>

Note:

Sometimes after encrypting with base64_encode, it is transmitted to other pages in the form of GET. When decrypted with base64_decode, garbled characters appear.

When I encounter this problem, I I was confused, why some can be decrypted correctly, but some are garbled?

After checking later, I found that there are some Chinese characters. When they are passed in the GET format, the + sign will be replaced by a space. .

In order to prevent garbled characters, I made a step of substitution and then decrypted it. Sure enough, the problem of garbled characters no longer exists!

For example, if you pass it in the form of GET oidVariable, then when decrypting and restoring, first replace the spaces with + signs. Then the output will be normal.

is as follows: $oid=base64_decode(str_replace(" ","+",$_GET[oid]));

The above is the detailed content of PHP rsa encryption, decryption, signature, signature verification public key example code detailed explanation. For more information, please follow other related articles on the PHP Chinese website!