PHP RSA加密解密实例

<?php
header('Content-Type:text/html;charset=utf-8');
                    //RSA加密解密实例
$private_key =  <<<EOF
-----BEGIN RSA PRIVATE KEY-----  
MIICXQIBAAKBgQC3//sR2tXw0wrC2DySx8vNGlqt3Y7ldU9+LBLI6e1KS5lfc5jl  
TGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2klBd6h4wrbbHA2XE1sq21ykja/  
Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o2n1vP1D+tD3amHsK7QIDAQAB  
AoGBAKH14bMitESqD4PYwODWmy7rrrvyFPEnJJTECLjvKB7IkrVxVDkp1XiJnGKH  
2h5syHQ5qslPSGYJ1M/XkDnGINwaLVHVD3BoKKgKg1bZn7ao5pXT+herqxaVwWs6  
ga63yVSIC8jcODxiuvxJnUMQRLaqoF6aUb/2VWc2T5MDmxLhAkEA3pwGpvXgLiWL  
3h7QLYZLrLrbFRuRN4CYl4UYaAKokkAvZly04Glle8ycgOc2DzL4eiL4l/+x/gaq  
deJU/cHLRQJBANOZY0mEoVkwhU4bScSdnfM6usQowYBEwHYYh/OTv1a3SqcCE1f+  
qbAclCqeNiHajCcDmgYJ53LfIgyv0wCS54kCQAXaPkaHclRkQlAdqUV5IWYyJ25f  
oiq+Y8SgCCs73qixrU1YpJy9yKA/meG9smsl4Oh9IOIGI+zUygh9YdSmEq0CQQC2  
4G3IP2G3lNDRdZIm5NZ7PfnmyRabxk/UgVUWdk47IwTZHFkdhxKfC8QepUhBsAHL  
QjifGXY4eJKUBm3FpDGJAkAFwUxYssiJjvrHwnHFbg0rFkvvY63OSmnRxiL4X6EY  
yI9lblCsyfpl25l7l5zmJrAHn45zAiOoBrWqpM5edu7c  
-----END RSA PRIVATE KEY-----
EOF;
  
$public_key = '-----BEGIN PUBLIC KEY-----  
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3//sR2tXw0wrC2DySx8vNGlqt  
3Y7ldU9+LBLI6e1KS5lfc5jlTGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2kl  
Bd6h4wrbbHA2XE1sq21ykja/Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o  
2n1vP1D+tD3amHsK7QIDAQAB  
-----END PUBLIC KEY-----'; 
//签名
function sign($data, $sign, $private_key){
    $d = openssl_sign($data, $sign, $private_key ,'SHA256');
    $sign = base64_encode($sign);
    return $sign; 
}
//验证
function verify($data, $sign, $public_key){+
    $sign = base64_decode($sign);
    $v = openssl_verify($data, $sign, $public_key ,'SHA256');
    return $v;
}

//私钥加密
function private_encrypt($data,$encrypted,$pi_key){
    openssl_private_encrypt($data,$encrypted,$pi_key); 
    $encrypted = base64_encode($encrypted);  
    return $encrypted; 
}
//公钥解密
function public_decrypt($data,$decrypted,$pu_key){
    openssl_public_decrypt(base64_decode($data),$decrypted,$pu_key); 
    return $decrypted; 
}
//公钥加密
function public_encrypt($data,$encrypted,$pu_key){
    openssl_public_encrypt($data,$encrypted,$pu_key); 
    $encrypted = base64_encode($encrypted);  
    return $encrypted;
}
//私钥解密
function private_decrypt($data,$decrypted,$pi_key){
    openssl_private_decrypt(base64_decode($data),$decrypted,$pi_key); 
    return $decrypted; 
}
$sign = '';
$encrypted = '';   
$decrypted = ''; 
$pi_key =  openssl_pkey_get_private($private_key);
$pu_key = openssl_pkey_get_public($public_key);

/*---------签名-------------*/
$data = 'AAAAA';
echo $data.'<br>签名:<br>';
echo sign($data, $sign, $private_key);
/*---------签名-------------*/
echo '<hr>';
/*---------验签-------------*/
$data = 'BBBBB';
$sign = 'dMHW4RooOpbUw8DYubIvkQskmGKG7jho0Lhp6FmHe/m28xzgLOLHAw+8zs+GzalYVGQYQ3cUbd4qCbT4uDG2I5cubC4R8fVPUItrt233d3YMVkacnNKWnoR9VeoEaS2HO6VrYBehXNVW6reGoOOJiqYLn/aWtYx84HbMKRKWRtg=';
echo $data.'和'.$sign.'<br>验签:<br>';
echo verify($data, $sign, $public_key);
/*---------验签-------------*/
echo '<hr><hr>';
/*---------私钥加密-------------*/
$data = 'CCCCCCCC';
echo $data.'<br>私钥加密:<br>';
echo private_encrypt($data, $encrypted, $pi_key);
/*---------私钥加密-------------*/
echo '<hr>';

/*---------公钥解密-------------*/
$data = 'BvjbtUzDKzZ2UbtWIFy7KPNJJGpDnS5Qd+w/kpYSFTg8l1kz+DqvCqfkBho2TRj8S5SFfy4DmFxyPnvpIhhUMC6bCMCOD8ULzk20rhqs7UZfX1OoTx9+IE7MO3slM91OqquO2HILHiiihIVBBn/l/0zAzH6GIC44LXJQUKJMDYI=';
echo $data.'<br>公钥解密:<br>';
echo public_decrypt($data, $decrypted, $pu_key);
/*---------公钥解密-------------*/
echo '<hr><hr>';
/*---------公钥加密-------------*/
$data = 'AAAAAAAAAAAAAAAAAAAA';
echo $data.'<br>公钥加密:<br>';
echo public_encrypt($data, $encrypted, $pu_key);
/*---------公钥加密-------------*/
echo '<hr>';

/*---------私钥解密-------------*/
$data = 'JZ2aRDoeiO1xzPFAhjbtJNMRRqZwrjjPK9d0dgRVtlMhWucHu6jrQR9QRETtM6eQgkrdvbxeMtJ87e6YmptYZUZZjALymT0yU7VO5aAVBKXnmyokqqfuJF41PYS6bSih/VFaIoanrTZGUf03suurjkbebx3yKLIBPdEgly6eM/k=';
echo $data.'<br>私钥解密:<br>';
echo private_decrypt($data,$decrypted,$pi_key);
/*---------私钥解密-------------*/
echo '<hr>';