php服务端与客户端交互、提供开放api时,通常需要对敏感的部分api数据传输进行数据加密,这时候rsa非对称加密就能派上用处了,下面通过一个例子来说明如何用php来实现数据的加密解密
1、加密解密的第一步是生成公钥、私钥对,私钥加密的内容能通过公钥解密(反过来亦可以)
下载开源RSA密钥生成工具openssl(通常Linux系统都自带该程序),解压缩至独立的文件夹,进入其中的bin目录,执行以下命令:
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
从上面看出通过私钥能生成对应的公钥,因此我们将私钥private_key.pem用在服务器端,公钥发放给android跟ios等前端
2、php中用生成的公钥、私钥进行加密解密,直接上代码
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<?php
$private_key = '-----BEGIN RSA PRIVATE KEY-----
MIICXQIBAAKBgQC3 //sR2tXw0wrC2DySx8vNGlqt3Y7ldU9+LBLI6e1KS5lfc5jl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----- END RSA PRIVATE KEY-----';
$public_key = '-----BEGIN PUBLIC KEY-----
MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3 //sR2tXw0wrC2DySx8vNGlqt
3Y7ldU9+LBLI6e1KS5lfc5jlTGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2kl
Bd6h4wrbbHA2XE1sq21ykja/Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o
2n1vP1D+tD3amHsK7QIDAQAB
----- END PUBLIC KEY-----';
//echo $private_key;
$pi_key = openssl_pkey_get_private( $private_key ); //这个函数可用来判断私钥是否是可用的,可用返回资源id Resource id
$pu_key = openssl_pkey_get_public( $public_key ); //这个函数可用来判断公钥是否是可用的
print_r( $pi_key ); echo "\n" ;
print_r( $pu_key ); echo "\n" ;
$data = "aassssasssddd" ; //原始数据
$encrypted = "" ;
$decrypted = "" ;
echo "source data:" , $data , "\n" ;
echo "private key encrypt:\n" ;
openssl_private_encrypt( $data , $encrypted , $pi_key ); //私钥加密
$encrypted = base64_encode ( $encrypted ); //加密后的内容通常含有特殊字符,需要编码转换下,在网络间通过url传输时要注意base64编码是否是url安全的
echo $encrypted , "\n" ;
echo "public key decrypt:\n" ;
openssl_public_decrypt( base64_decode ( $encrypted ), $decrypted , $pu_key ); //私钥加密的内容通过公钥可用解密出来
echo $decrypted , "\n" ;
echo "---------------------------------------\n" ;
echo "public key encrypt:\n" ;
openssl_public_encrypt( $data , $encrypted , $pu_key ); //公钥加密
$encrypted = base64_encode ( $encrypted );
echo $encrypted , "\n" ;
echo "private key decrypt:\n" ;
openssl_private_decrypt( base64_decode ( $encrypted ), $decrypted , $pi_key ); //私钥解密
echo $decrypted , "\n" ;
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/ghjbk/p/7519834.html