RC4加密中的其他字符

发布于 2025-02-13 12:33:20 字数 3087 浏览 0 评论 0原文

尝试使用打开的SSL RC4函数加密字符串时，我将面临问题。 somme添加字符在加密字符串的末尾添加。

这是我的代码：

RC4_KEY rc4_key;
QString key= "612c207468652066";

QByteArray keyData=key.QString::toUtf8();
unsigned char * mykey=reinterpret_cast<unsigned char *>(keyData.data());

QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";
qDebug()<< "input"<<input << input.size();
QByteArray inputData=input.QString::toUtf8();
unsigned char * ciphertext1= (unsigned char*)malloc(input.size());
memset(ciphertext1, 0, input.size());
ciphertext1=reinterpret_cast<unsigned char *>(QByteArray::fromHex(inputData).data());
printf("ciphertext1: %s\n", ciphertext1);

RC4_set_key(&rc4_key,keyData.size() , mykey);

unsigned char * firsthashJson= (unsigned char*)malloc(input.size());
firsthashJson[input.size()-1]=0x00;
memset(firsthashJson, 0, input.size());
RC4(&rc4_key,input.length(),ciphertext1, firsthashJson);
printf("Decrypted: %s\n", firsthashJson);

QString str1 = QString::fromUtf8((char*)firsthashJson);

我获得了以下结果： B036FE3EAE7881FE135562335F9A ## 5265705250 ## B2A475F7A99CF400D34DA436D52222D9B C5566D8B7A015C7A16EE2D5E730199ACF1F61FE2F3D6B9525E1C45ACB36383253B4FC＆lt; ú««««í ☻§@ı2w5▒ktâuæb¢¢dôxúx。°«▓j）→8èê╔┤║视@│K↕▬↨[

║gtuë B036FE3EAE7881FE135562335F9A ## 5265705250 ## B2A475F7A99CF400D34DA436D522D 9BC5566D8B7A015C7A16EE2D5E730199ACF1F61FE2F3D6B9525E1C45ACB36383253B4FC

来源有任何想法

。

您对此问题的 #####################################

感谢您的帮助。

不幸的是，我在这里遇到了同样的问题：新代码：

RC4_KEY rc4_key;
QString key= "612c207468652066";

QByteArray keyData=key.QString::toUtf8();
unsigned char * mykey=reinterpret_cast<unsigned char *>(keyData.data());

QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";
qDebug()<< "input"<<input << input.size();
QByteArray inputData=input.QString::toUtf8();
unsigned char * ciphertext1= (unsigned char*)malloc(input.size());
memset(ciphertext1, 0, input.size());
ciphertext1=reinterpret_cast<unsigned char *>(QByteArray::fromHex(inputData).data());
printf("ciphertext1: %s\n", ciphertext1);

RC4_set_key(&rc4_key,keyData.size() , mykey);

unsigned char * firsthashJson= (unsigned char*)malloc(input.size()+1);

memset(firsthashJson, 0, input.size()+1);
firsthashJson[input.size()]=0;

RC4(&rc4_key,input.size(),ciphertext1, firsthashJson);
printf("Decrypted: %s\n", firsthashJson);

firsthashJson[input.size()]=0;
QString str1 = QString::fromUtf8((char*)firsthashJson);

qDebug()<<"final string "<<str1<< str1.size();

原文

I am facing an issue when trying to encrypt a string using Open SSL RC4 function. Somme additionnal characters where added at the end of the encrypted string.

Here is my code :

RC4_KEY rc4_key;
QString key= "612c207468652066";

QByteArray keyData=key.QString::toUtf8();
unsigned char * mykey=reinterpret_cast<unsigned char *>(keyData.data());

QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";
qDebug()<< "input"<<input << input.size();
QByteArray inputData=input.QString::toUtf8();
unsigned char * ciphertext1= (unsigned char*)malloc(input.size());
memset(ciphertext1, 0, input.size());
ciphertext1=reinterpret_cast<unsigned char *>(QByteArray::fromHex(inputData).data());
printf("ciphertext1: %s\n", ciphertext1);

RC4_set_key(&rc4_key,keyData.size() , mykey);

unsigned char * firsthashJson= (unsigned char*)malloc(input.size());
firsthashJson[input.size()-1]=0x00;
memset(firsthashJson, 0, input.size());
RC4(&rc4_key,input.length(),ciphertext1, firsthashJson);
printf("Decrypted: %s\n", firsthashJson);

QString str1 = QString::fromUtf8((char*)firsthashJson);

I obtained the following result: b036fe3eae7881fe135562335f9a##5265705250##b2a475f7a99cf400d34da436d522d9bc5566d8b7a015c7a16ee2d5e730199acf1f61fe2f3d6b9525e1c45acb36383253b4fc< Ú«Í`ã¿rßÖQÕ§ìj‗¤Ì&Öâ¤#>XÏ¸0õ+▲®╩Ä=╚líUm"ód☻Ô1ı┘©ÜLÔ»âH÷/o┐öñ▄|▄ÐÄ┤N ☻§@ı2w5▒KTâUÆB¢ÏdÔxÚ⌂ê☺°¹╔«▓J)→8èê╔┤║ù@│k ↕▬↨[║GtUË(♂D

the expected one is : b036fe3eae7881fe135562335f9a##5265705250##b2a475f7a99cf400d34da436d522d9bc5566d8b7a015c7a16ee2d5e730199acf1f61fe2f3d6b9525e1c45acb36383253b4fc

Do you have any idea of the source cause of this issue.

Thanks in advance for your help.

###############################################################

@paddy
Thank you for your help.

Unfortunately i have the same issue here is the new code:

RC4_KEY rc4_key;
QString key= "612c207468652066";

QByteArray keyData=key.QString::toUtf8();
unsigned char * mykey=reinterpret_cast<unsigned char *>(keyData.data());

QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";
qDebug()<< "input"<<input << input.size();
QByteArray inputData=input.QString::toUtf8();
unsigned char * ciphertext1= (unsigned char*)malloc(input.size());
memset(ciphertext1, 0, input.size());
ciphertext1=reinterpret_cast<unsigned char *>(QByteArray::fromHex(inputData).data());
printf("ciphertext1: %s\n", ciphertext1);

RC4_set_key(&rc4_key,keyData.size() , mykey);

unsigned char * firsthashJson= (unsigned char*)malloc(input.size()+1);

memset(firsthashJson, 0, input.size()+1);
firsthashJson[input.size()]=0;

RC4(&rc4_key,input.size(),ciphertext1, firsthashJson);
printf("Decrypted: %s\n", firsthashJson);

firsthashJson[input.size()]=0;
QString str1 = QString::fromUtf8((char*)firsthashJson);

qDebug()<<"final string "<<str1<< str1.size();

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心头的小情儿 2025-02-20 12:33:20

您的核心问题是您将input.size（）作为len参数传递给rc4，但是input.size（）实际上是双重 ciphertext1，因为十六进制编码。

这是一个正确的版本，而没有留下QT的舒适性和安全性：

QString key = "612c207468652066";
QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";

RC4_KEY rc4_key;
RC4_set_key(&rc4_key, key.size(), key.toUtf8().data()); // Or qUtf8Printable(key)
QByteArray ciphertext = QByteArray::fromHex(input.toUtf8());

QByteArray firsthashJson(ciphertext.size(), 0);
RC4(&rc4_key, ciphertext.size(), ciphertext.data(), firsthashJson.data());

QString decrypted = QString::fromUtf8(firsthashJson);
qDebug()<<"final string " << decrypted;

Your core problem is that you are passing input.size() as the len parameter to RC4, but input.size() is actually double the size of your ciphertext1 because of hex encoding.

Here is a correct version without leaving the comfort and safety of Qt:

QString key = "612c207468652066";
QString input = "7447806cc997966f6b8b59a57c01bfe6fe8381d4fed5628b531fbeb1c4629151722ee712fa906dfea1c68b7015243bfcdd42d3e990c1bd6daa56df620a9d1e441f4ba308da5584e032f06fe925ee9df328fadab0ad2a5869fdea366189a397f72b320a4f11b0cc41cbfaa3b6923f20cc8c4c80d9c9b69eb5e2a6cc2fb9ee2e72ca79f08617b3b5812eddb3f58b68";

RC4_KEY rc4_key;
RC4_set_key(&rc4_key, key.size(), key.toUtf8().data()); // Or qUtf8Printable(key)
QByteArray ciphertext = QByteArray::fromHex(input.toUtf8());

QByteArray firsthashJson(ciphertext.size(), 0);
RC4(&rc4_key, ciphertext.size(), ciphertext.data(), firsthashJson.data());

QString decrypted = QString::fromUtf8(firsthashJson);
qDebug()<<"final string " << decrypted;

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