ganzf
/
uniIM


			
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							<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>
        <script src="js/jquery-1.11.3.min.js"></script>
        <script src="js/jsencrypt.min.js"></script>
    </head>
    <body style="text-align: center;">
        <label for="privkey">私钥</label>
        <br/>
        <textarea id="privkey" rows="15" cols="65">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</textarea>
        <br/>
        <label for="pubkey">公钥</label>
        <br/>
        <textarea id="pubkey" rows="15" cols="65">MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC8JU1nBDZ5PgRNAxksTC/MlaBX37vjTH84ppzmuEpH7e6G43QXd7Zof8apIJ4efk6Uiw2/OJfkyMGDsAJTv/zWnuKm6UeyBYxtgP5JFGtTMKTBVuGzH8UzYWdPzybIOCmj55Qku3nYEZyro38dGhSFLSPaU3eoY1tblm5ZFJ+8ewIDAQAB</textarea>
        <br/>
        <label for="input">要加密的字符串:</label>
        <br/>
        <textarea id="input" name="input" type="text" rows='4' cols='70'>123456789</textarea>
        <br/>
        <input id="testme" type="button" value="Test Me!!!" />
        <br/>
        <label for="jiami">加密后的密文:</label>
        <br/>
        <textarea id="jiami" name="jiami" type="text" rows='4' cols='70'></textarea>
        <br/>
        <label for="pubkey">解密后的密文</label>
        <br/>
        <textarea id="jiemi" name="jiemi" type="text" rows='4' cols='70'></textarea>        
<script type="text/javascript">
    $(function() {
        $('#testme').click(function() {
            // 进行RSA加密
            var encrypt = new JSEncrypt();
            //获取公钥
            encrypt.setPublicKey($('#pubkey').val());
            //公钥加密
            var encrypted = encrypt.encryptLong2($('#input').val());
            // 加密后的密文
            $('#jiami').val(encrypted);
            
            //解密
            var decrypt = new JSEncrypt();
            //获取私钥
            decrypt.setPrivateKey($('#privkey').val());
            //解药
            var uncrypted = decrypt.decryptLong2(encrypted);
            $('#jiemi').val(uncrypted);
        });
        
    });
</script>               
        
        
<script>
// Convert a hex string to a byte array
    function hexToBytes(hex) {
        for (var bytes = [], c = 0; c < hex.length; c += 2)
            bytes.push(parseInt(hex.substr(c, 2), 16));
        return bytes;
    }

// Convert a byte array to a hex string
    function bytesToHex(bytes) {
        for (var hex = [], i = 0; i < bytes.length; i++) {
            hex.push((bytes[i] >>> 4).toString(16));
            hex.push((bytes[i] & 0xF).toString(16));
        }
        return hex.join("");
    }
            

//方法一
JSEncrypt.prototype.encryptLong=function (d){
  var k = this.key;
  var maxLength = (((k.n.bitLength() + 7) >> 3) - 11);

  try {
    var lt = "";
    var ct = "";

    if (d.length > maxLength) {
      lt = d.match(/.{1,117}/g);
      lt.forEach(function (entry) {
        var t1 = k.encrypt(entry);
        ct += t1;
      });
      return hexToBytes(ct);
    }
    var t = k.encrypt(d);
    var y = hexToBytes(t);
    return y;
  } catch (ex) {
    return false;
  }
}

JSEncrypt.prototype.decryptLong = function (string) {
    var k = this.getKey();
    var maxLength = ((k.n.bitLength() + 7) >> 3);
    //var maxLength = 128;
    try {

        var str = bytesToHex(string);
        //var b=hex2Bytes(str);

        var inputLen = str.length;

        var ct = "";
        if (str.length > maxLength) {

            var lt = str.match(/.{1,256}/g);
            lt.forEach(function (entry) {
                var t1 = k.decrypt(entry);
                ct += t1;
            });
            return ct;
        }
        var y = k.decrypt(bytesToHex(string));
        return y;
    } catch (ex) {
        return false;
    }
};


//方法2
JSEncrypt.prototype.encryptLong2 = function (string) {
    var k = this.getKey();
    try {
        var lt = "";
        var ct = "";
        //RSA每次加密117bytes，需要辅助方法判断字符串截取位置
        //1.获取字符串截取点
        var bytes = new Array();
        bytes.push(0);
        var byteNo = 0;
        var len, c;
        len = string.length;
        var temp = 0;
        for (var i = 0; i < len; i++) {
            c = string.charCodeAt(i);
            if (c >= 0x010000 && c <= 0x10FFFF) {
                byteNo += 4;
            } else if (c >= 0x000800 && c <= 0x00FFFF) {
                byteNo += 3;
            } else if (c >= 0x000080 && c <= 0x0007FF) {
                byteNo += 2;
            } else {
                byteNo += 1;
            }
            if ((byteNo % 117) >= 114 || (byteNo % 117) == 0) {
                if (byteNo - temp >= 114) {
                    bytes.push(i);
                    temp = byteNo;
                }
            }
        }
        //2.截取字符串并分段加密
        if (bytes.length > 1) {
            for (var i = 0; i < bytes.length - 1; i++) {
                var str;
                if (i == 0) {
                    str = string.substring(0, bytes[i + 1] + 1);
                } else {
                    str = string.substring(bytes[i] + 1, bytes[i + 1] + 1);
                }
                var t1 = k.encrypt(str);
                ct += t1;
            }
            ;
            if (bytes[bytes.length - 1] != string.length - 1) {
                var lastStr = string.substring(bytes[bytes.length - 1] + 1);
                ct += k.encrypt(lastStr);
            }
            return hexToBytes(ct);
        }
        var t = k.encrypt(string);
        var y = hexToBytes(t);
        return y;
    } catch (ex) {
        return false;
    }
};

JSEncrypt.prototype.decryptLong2 = function (string) {
    var k = this.getKey();
    // var maxLength = ((k.n.bitLength()+7)>>3);
    var MAX_DECRYPT_BLOCK = 128;
    try {
        var ct = "";
        var t1;
        var bufTmp;
        var hexTmp;
        var str = bytesToHex(string);
        var buf = hexToBytes(str);
        var inputLen = buf.length;
        //开始长度
        var offSet = 0;
        //结束长度
        var endOffSet = MAX_DECRYPT_BLOCK;

        //分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                bufTmp = buf.slice(offSet, endOffSet);
                hexTmp = bytesToHex(bufTmp);
                t1 = k.decrypt(hexTmp);
                ct += t1;
                
            } else {
                bufTmp = buf.slice(offSet, inputLen);
                hexTmp = bytesToHex(bufTmp);
                t1 = k.decrypt(hexTmp);
                ct += t1;
             
            }
            offSet += MAX_DECRYPT_BLOCK;
            endOffSet += MAX_DECRYPT_BLOCK;
        }
        return ct;
    } catch (ex) {
        return false;
    }
};
</script>
        
        
    </body>
</html>

作者：Astep
链接：https://www.jianshu.com/p/54cb90e6e183
來源：简书
简书著作权归作者所有，任何形式的转载都请联系作者获得授权并注明出处。