php 的rsa加密与解密

linux系统生成公私钥对方法：

openssl genrsa -out rsa_private_key.pem 1024
openssl pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -out private_key.pem
openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem

第一条命令生成原始 RSA私钥文件 rsa_private_key.pem，第二条命令将原始 RSA私钥转换为 pkcs8格式，第三条生成RSA公钥 rsa_public_key.pem

下面是代码：

公钥加密私钥解密

$source='abcde';
$pkeyid=file_get_contents(DIR_BASE.'/rsa_key/rsa_public_key.pem', 'r');
$res = openssl_get_publickey($pkeyid);
openssl_public_encrypt($source,$crypttext,$res);
echo $crypttext;
$pkeyid=file_get_contents(DIR_BASE.'/rsa_key/rsa_private_key.pem', 'r');
$res2 = openssl_get_privatekey($pkeyid);
if(openssl_private_decrypt($crypttext,$data,$res2)){
echo $data;
}else{
echo "false";
}

私钥加密公钥解密

$source='abcde';
$pkeyid=file_get_contents(DIR_BASE.'/rsa_key/rsa_private_key.pem', 'r');
$res = openssl_get_privatekey($pkeyid);
openssl_private_encrypt($source,$crypttext,$res);
echo $crypttext;
$pkeyid=file_get_contents(DIR_BASE.'/rsa_key/rsa_public_key.pem', 'r');
$res2 = openssl_get_publickey($pkeyid);
if(openssl_public_decrypt($crypttext,$data,$res2)){
echo $data;
}else{
echo "false";
}