Posted in PHP onAugust 05, 2019
本文实例讲述了RSA实现JS前端加密与PHP后端解密功能。分享给大家供大家参考,具体如下:
web前端,用户注册与登录,不能直接以明文形式提交用户密码,容易被截获,这时就引入RSA。
前端加密
需引入4个JS扩展文件,jsbn.js、prng4.js、rng.js和rsa.js。
<html> <head> <title>RSA Login Test</title> <meta charset="utf-8"> <script type="text/javascript" src="./js/jsbn.js"></script> <script type="text/javascript" src="./js/prng4.js"></script> <script type="text/javascript" src="./js/rng.js"></script> <script type="text/javascript" src="./js/rsa.js"></script> <script src="//cdn.bootcss.com/jquery/3.0.0/jquery.min.js"></script> <script type="text/javascript"> function cmdEncrypt() { var passwd = $('#passwd').val(); var rsa = new RSAKey(); //openssl生成的modulus,十六进制数据 var modulus = "DB1EA572B55F5D9C8ADF092F5DCC3559CFEA8CE8BB54E3A71DA9B1AFBD7D17CF80ADB224FE4EA5379BC782F41C137748D8F1B5A36AD62A127EF5E87EFB25C209A66BCEE9925CE09631BF2271E81123E93438646625080FF04F4F2CF532B077E3E390486DF40E7586F0AE522C873F33170222F46BDB6084F55DE6B7031E55DBE7"; //openssl生成秘钥时的e的值(0x10001) var exponent = "10001"; rsa.setPublic(modulus, exponent); var res = rsa.encrypt(passwd); $('#passwd').val(res); } </script> </head> <body> <form action="./login.php" method="post" > <label for="username">用户名:</label><input type="text" name="username" id="username"> <label for="passwd">密 码:</label><input type="password" name="password" id="passwd"> <input type="submit" value="登录" onclick="cmdEncrypt();"> </form> </body> </html>
前端代码十分简单,只有短短的几行,下面分别解释具体的含义:
- 1.
new
一个RSAKey对象, - 2.定义modulus(模数),我们可以根据私钥计算出该值(十六进制),具体指令:
rsa -in rsa_private_key.pem -noout -modulus
- 3.定义exponent,此值在openssl生成秘钥时,输出,一般情况下e的取值是一个定值10001(十六进制)
- 4.设置公钥
- 5.加密数据
至此,我们就完成了前端的公钥加密。
后端解密
//私钥 $private_key = "-----BEGIN RSA PRIVATE KEY----- MIICXAIBAAKBgQDICrXl+ELhqFE0xCGA3/xdN1VxwUc5kxAKb5f3F28HY40zdXbn uwpdQNKnHwTNvHZupBRHlYpqX+1Plti81sRadtYKNwVoLRlwwP3mzIyRRvO0hf3c VXn33r4A5y1YUh+txvfgikbmmnsjP4pP3CIZC0TeDMt1+h17cV6s6KDdOQIDAQAB AoGAdu2/NQkDIkvCc7+DN65yyCyklOvW34jqSXoM++8nqFnsUcKtPZn60HRAiPEt Fu/L7X2JPQHP9+wuF1pUYvjAZQb5E9n8G12nxduBS5Ux085INOWP69pXnsljhyip mpRgPf7ZsgGlftVXlg+HrUfzxj26NqEKwn61mi+CjMSMt/ECQQDpg868PEiJED/g pUMTT7gRgDAdmPJ0+ALn82zsfA84zDA8Po9EREfXRM2Mar/fuvXL/vc0FBRYGaA/ VAinKJ6tAkEA203JDovTnfG87zNl9z0/z3kUxCMRy+7M28+7btF1eaDzxJWVFWtX cv4EjHjDN6ClhT6ATuamw0sNlta9n4cGPQJASBltXItUbhV5U5hTNIQ5thWZRZoy ylDFPO7ZI89ON+A7yG4ceByI/ft9Z6ySH7cvK1RG6WqFuYn4A3Wj0lDlZQJBAIjr Pq0TRbLl25ToXTAIkI9jREDUuGa/mC1gu+ALbDHc+HTzAxpVY0rLJ2Hgf9l6Nf1D sW4ReWqSsFBNkCRKc+0CQClxcPv2wwSGMFhLTqpKeySPIeVy4NrTHv8zEYvm7MuU Gvlsj6sqvcuUQbVHoLRpqQiDi8TPaEMHzS9fhDjVUUc= -----END RSA PRIVATE KEY-----"; $hex_encrypt_data = trim($_POST['password']); //十六进制数据 $encrypt_data = pack("H*", $hex_encrypt_data); //对十六进制数据进行转换 openssl_private_decrypt($encrypt_data, $decrypt_data, $private_key); //解密数据 echo '解密后的数据:' . $decrypt_data;
openssl操作截图:
需要注意的是:前端加密的时候如果是中文,则解密后是乱码。
openssl工具和完整demo,详见:https://github.com/cqingt/RSA_JS_PHP
RSA实现JS前端加密与PHP后端解密功能示例
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