PHP rsa加密解密使用方法
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:
opensslgenrsa-outrsa_private_key.pem1024 opensslpkcs8-topk8-informPEM-inrsa_private_key.pem-outformPEM-nocrypt-outprivate_key.pem opensslrsa-inrsa_private_key.pem-pubout-outrsa_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
<?php $private_key='-----BEGINRSAPRIVATEKEY----- 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 -----ENDRSAPRIVATEKEY-----'; $public_key='-----BEGINPUBLICKEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC3//sR2tXw0wrC2DySx8vNGlqt 3Y7ldU9+LBLI6e1KS5lfc5jlTGF7KBTSkCHBM3ouEHWqp1ZJ85iJe59aF5gIB2kl Bd6h4wrbbHA2XE1sq21ykja/Gqx7/IRia3zQfxGv/qEkyGOx+XALVoOlZqDwh76o 2n1vP1D+tD3amHsK7QIDAQAB -----ENDPUBLICKEY-----'; //echo$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idResourceid $pu_key=openssl_pkey_get_public($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=""; $decrypted=""; echo"sourcedata:",$data,"\n"; echo"privatekeyencrypt:\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$encrypted,"\n"; echo"publickeydecrypt:\n"; openssl_public_decrypt(base64_decode($encrypted),$decrypted,$pu_key);//私钥加密的内容通过公钥可用解密出来 echo$decrypted,"\n"; echo"---------------------------------------\n"; echo"publickeyencrypt:\n"; openssl_public_encrypt($data,$encrypted,$pu_key);//公钥加密 $encrypted=base64_encode($encrypted); echo$encrypted,"\n"; echo"privatekeydecrypt:\n"; openssl_private_decrypt(base64_decode($encrypted),$decrypted,$pi_key);//私钥解密 echo$decrypted,"\n";