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PHP rsa加密解密使用方法

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2016-06-13 09:05:52989browse

PHP rsa加密解密使用方法

   PHP rsa加密解密使用方法

       这篇文章主要介绍了PHP rsa加密解密使用方法,本文讲解了生成公钥、私钥及PHP中使用生成的公钥、私钥进行加密解密实例,需要的朋友可以参考下

  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:

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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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$private_key = '-----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-----';

 

$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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