Table of Contents
回复讨论(解决方案)
Home Backend Development PHP Tutorial PHP加密算法转换delphi出问题

PHP加密算法转换delphi出问题

Jun 20, 2016 pm 12:42 PM

 function encrypt($string,$operation,$key='')    {        $key=md5($key);        $key_length=strlen($key);        $string=$operation=='D'?base64_decode($string):substr(md5($string.$key),0,8).$string;        $string_length=strlen($string);        $rndkey=$box=array();        $result='';        for($i=0;$i<=255;$i++)        {            $rndkey[$i]=ord($key[$i%$key_length]);            $box[$i]=$i;        }        for($j=$i=0;$i<256;$i++)        {            $j=($j+$box[$i]+$rndkey[$i])%256;            $tmp=$box[$i];            $box[$i]=$box[$j];            $box[$j]=$tmp;        }        for($a=$j=$i=0;$i<$string_length;$i++)        {            $a=($a+1)%256;            $j=($j+$box[$a])%256;            $tmp=$box[$a];            $box[$a]=$box[$j];            $box[$j]=$tmp;            $result.=chr(ord($string[$i])^($box[($box[$a]+$box[$j])%256]));        }        if($operation=='D')        {            if(substr($result,0,8)==substr(md5(substr($result,8).$key),0,8))            {                return substr($result,8);            }            else            {                return'';            }        }        else        {            return str_replace('=','',base64_encode($result));        }    }$id = '123sdfsdf';$key = 'aasd1234567985fdgdfdfgdg';$token = encrypt($id, 'E', $key);echo '加密:'.encrypt($id, 'E', $key);echo '<br />';echo '解密:'.encrypt($token, 'D', $key);
Copy after login



function encrypt(str, operation, key: string): string;  function StrToMD5(s: string): string;  var    Md5Encode: TIdHashMessageDigest5;  begin         Md5Encode := TIdHashMessageDigest5.Create;    Result := Md5Encode.AsHex(Md5Encode.HashValue(S));    Md5Encode.Free;       end;var  key_length: Integer;  string_length: Integer;  I, j, A: Integer;  rndkey: array[0..255] of Byte;  Box: array[0..255] of Byte;  tmp: Byte;begin  key := LowerCase(StrToMD5(key));  key_length := Length(key);  if operation = 'D' then    str := DecodeString(str)  else    str := Copy(lowerCase(StrToMD5(str + key)), 1, 8) + str;  string_length := Length(str);  result := '';  for i := 0 to 255 do  begin    rndkey[i] := ord(key[(i mod key_length) + 1]);    Box[i] := i;  end;  j := 0;  for i := 0 to 255 do  begin    j := (j + Box[i] + rndkey[i]) mod 256;    tmp := Box[i];    Box[i] := Box[j];    Box[j] := tmp;  end;  a := 0;  j := 0;  for i := 1 to string_length do  begin    A := (A + 1) mod 256;    j := (j + Box[A]) mod 256;    tmp := Box[A];    Box[A] := Box[j];    Box[j] := tmp;    result := result + chr(ord(str[i]) xor (Box[(Box[A] + Box[j]) mod 256]));  end;  if (operation = 'D') then  begin      if (copy(result, 1, 8) = copy(lowerCase(StrToMd5(copy(result, 9, Length(Result) - 8) + key)), 1, 8)) then    begin      Result := copy(result, 9, Length(Result) - 8);    end    else    begin      Result := '';    end;  end  else  begin    Result := StringReplace(EncodeString(result), '=', '', [rfReplaceAll]);  end; end;
Copy after login

自己网上找的PHP加密算法,但是转成DELPHI 时候只有加密正确 解密不正确
求前辈帮忙完美转换


回复讨论(解决方案)

这个完全没什么技术难度,你只是不会调试而已。
既然能把代码转过去了,哪行对应哪行就清楚了
取一行php输出一下变量,delphi输出一下变量,如果变量值有不同就是这行错了。
程序就在那里慢慢查肯定能查出是哪行错了,实在不行一行行对比也行啊。
 所以找到问题只是时间问题,这个完全没有难度只是费时费力而已。

你这个是什么加密算法?

delphi 的 DecodeString 是对应 php 的 base64_decode 吗?
那么 DecodeString 函数是残废的 base64 串是如何处理的?
建议你补齐尾部的 =

这个完全没什么技术难度,你只是不会调试而已。
既然能把代码转过去了,哪行对应哪行就清楚了
取一行php输出一下变量,delphi输出一下变量,如果变量值有不同就是这行错了。
程序就在那里慢慢查肯定能查出是哪行错了,实在不行一行行对比也行啊。
 所以找到问题只是时间问题,这个完全没有难度只是费时费力而已。


调试过了 DecodeString 后解密出来的字符串 delphi 比 php 少了2位

delphi 的 DecodeString 是对应 php 的 base64_decode 吗?
那么 DecodeString 函数是残废的 base64 串是如何处理的?
建议你补齐尾部的 =



我试试吧后尾补=看看,

delphi 的 DecodeString 是对应 php 的 base64_decode 吗?
那么 DecodeString 函数是残废的 base64 串是如何处理的?
建议你补齐尾部的 =


补齐尾部的=也不行,现在发现DecodeString解密出来的字符出错了

按你给出的参数,$token 尾部有一个 = 被删去
这与你 delphi 比 php 少了2位 的说法是吻合的
base64 将 3 个字解扩展成 4 个字节 ,尾部的 2 个字符扩展后需用 = 补齐
解码时如果因残废了而舍弃,就正好少了2个字符

你怎么补的?贴出代码




按你给出的参数,$token 尾部有一个 = 被删去
这与你 delphi 比 php 少了2位 的说法是吻合的
base64 将 3 个字解扩展成 4 个字节 ,尾部的 2 个字符扩展后需用 = 补齐
解码时如果因残废了而舍弃,就正好少了2个字符



按照你的方法我的delphi 版后面加了 = 
然后解密出来 字符再转成 Asc码比对了下delphi 和 PHP 分别为
delphi 版
1571920612038416510212118647183621641859132545612373206113391
php 版
157192061203841651021211864718362164185913254561237320611339
后面少了个1

  if operation = 'D' then
     在这里给 str 加上 (4 - Length(str)%4)%4 个 =
    str := DecodeString(str)
  else

或者你看看
DecodeString("YWI=")

DecodeString("YWI")
的结果分别是什么

  if operation = 'D' then
     在这里给 str 加上 (4 - Length(str)%4)%4 个 =
    str := DecodeString(str)
  else



按照你的方法可以了,原来要补齐4的整数=谢谢版主
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

What are Enumerations (Enums) in PHP 8.1? What are Enumerations (Enums) in PHP 8.1? Apr 03, 2025 am 12:05 AM

The enumeration function in PHP8.1 enhances the clarity and type safety of the code by defining named constants. 1) Enumerations can be integers, strings or objects, improving code readability and type safety. 2) Enumeration is based on class and supports object-oriented features such as traversal and reflection. 3) Enumeration can be used for comparison and assignment to ensure type safety. 4) Enumeration supports adding methods to implement complex logic. 5) Strict type checking and error handling can avoid common errors. 6) Enumeration reduces magic value and improves maintainability, but pay attention to performance optimization.

Describe the SOLID principles and how they apply to PHP development. Describe the SOLID principles and how they apply to PHP development. Apr 03, 2025 am 12:04 AM

The application of SOLID principle in PHP development includes: 1. Single responsibility principle (SRP): Each class is responsible for only one function. 2. Open and close principle (OCP): Changes are achieved through extension rather than modification. 3. Lisch's Substitution Principle (LSP): Subclasses can replace base classes without affecting program accuracy. 4. Interface isolation principle (ISP): Use fine-grained interfaces to avoid dependencies and unused methods. 5. Dependency inversion principle (DIP): High and low-level modules rely on abstraction and are implemented through dependency injection.

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What is REST API design principles? What is REST API design principles? Apr 04, 2025 am 12:01 AM

RESTAPI design principles include resource definition, URI design, HTTP method usage, status code usage, version control, and HATEOAS. 1. Resources should be represented by nouns and maintained at a hierarchy. 2. HTTP methods should conform to their semantics, such as GET is used to obtain resources. 3. The status code should be used correctly, such as 404 means that the resource does not exist. 4. Version control can be implemented through URI or header. 5. HATEOAS boots client operations through links in response.

How do you handle exceptions effectively in PHP (try, catch, finally, throw)? How do you handle exceptions effectively in PHP (try, catch, finally, throw)? Apr 05, 2025 am 12:03 AM

In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.

What are anonymous classes in PHP and when might you use them? What are anonymous classes in PHP and when might you use them? Apr 04, 2025 am 12:02 AM

The main function of anonymous classes in PHP is to create one-time objects. 1. Anonymous classes allow classes without names to be directly defined in the code, which is suitable for temporary requirements. 2. They can inherit classes or implement interfaces to increase flexibility. 3. Pay attention to performance and code readability when using it, and avoid repeatedly defining the same anonymous classes.

See all articles