江伟的笔记

主要用于php对接java的接口
rsa签名用SHA1WithRSA算法

<?php
/**
 * DES加密/解密，RSA加密/验签
 * @author jiangwei<jw90098@gmail.com>
 * @version $Id: Crypt.class.php  $
 */

class Crypt
{

    // DES加密
    public function encrypt($str, $key)  {  
        $block = mcrypt_get_block_size('des', 'ecb');  
        $pad = $block - (strlen($str) % $block);  
        $str .= str_repeat(chr($pad), $pad);  
        $str = mcrypt_encrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);  
        return base64_encode($str);  
    }  

    // DES解密
    public function decrypt($str, $key) {  
        $str = base64_decode($str);  
        $str = mcrypt_decrypt(MCRYPT_DES, $key, $str, MCRYPT_MODE_ECB);  
        $block = mcrypt_get_block_size('des', 'ecb');  
        $pad = ord($str[($len = strlen($str)) - 1]);  
        return substr($str, 0, strlen($str) - $pad);  
    }  


    // RSA签名(SHA1WithRSA算法)
    public function sign($content, $rsaPrivateKeyPem) {
            $priKey = file_get_contents($rsaPrivateKeyPem);
            $res = openssl_get_privatekey($priKey);
            openssl_sign($content, $sign, $res);
            openssl_free_key($res);
            $sign = base64_encode($sign);
            return $sign;
     }

     // RSA验签
     public function verify($data, $sign, $publicRsaPath)  {
        //读取公钥文件
        $pubKey = file_get_contents($publicRsaPath);
        //转换为openssl格式密钥
        $res = openssl_get_publickey($pubKey);
        //调用openssl内置方法验签，返回bool值
        $result = (bool)openssl_verify($data, base64_decode($sign), $res);
        //释放资源
        openssl_free_key($res);
        //返回资源是否成功
        return $result;
    }
}

php7 废除了 mcrypt_encrypt, 改用 openssl_encrypt

class DES{
    public static function encrypt($str,$key){
        $str = self::pkcs5_pad($str, 8);
        if (strlen($str) % 8) {
            $str = str_pad($str,
                strlen($str) + 8 - strlen($str) % 8, "\0");
        }
        $sign = openssl_encrypt (
            $str,
            'DES-EDE3' ,
            $key,
            OPENSSL_RAW_DATA | OPENSSL_NO_PADDING ,
            ''
        );

        return strtoupper(bin2hex($sign));
    }

    private static function pkcs5_pad($text, $blocksize) {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }
}

对比示例 java php