在C#中无法获得与python中相同的哈希 [英] Cannot get same hash in C# as in python

问题描述

我有一个字符串，需要对其进行哈希处理才能访问API. API创建者已在Python中提供了一个代码段，该代码段对如下代码进行了散列:

hashed_string = hashlib.sha1(string_to_hash).hexdigest()

使用此哈希字符串访问API时，一切都很好.我试图在C#中获得相同的哈希字符串结果，但没有成功.我已经尝试了许多难以置信的方法，但到目前为止没有任何效果.我也知道最十六进制的部分，因此在尝试模仿行为时请牢记这一点.

有人知道如何在C#中获得相同的结果吗?

这是我尝试在C#中重现相同结果的多种方法之一:

public string Hash(string input)
{
    using (SHA1Managed sha1 = new SHA1Managed())
    {
        var hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));
        var sb = new StringBuilder(hash.Length * 2);

        foreach (byte b in hash)
        {
            sb.Append(b.ToString("X2"));
        }

        return sb.ToString().ToLower();
    }
}

此代码摘自:在C#中使用SHA1算法进行哈希处理

另一种方式

public string ToHexString(string myString)
{
    HMACSHA1 hmSha1 = new HMACSHA1();
    Byte[] hashMe = new ASCIIEncoding().GetBytes(myString);
    Byte[] hmBytes = hmSha1.ComputeHash(hashMe);
    StringBuilder hex = new StringBuilder(hmBytes.Length * 2);
    foreach (byte b in hmBytes)
    {
        hex.AppendFormat("{0:x2}", b);
    }
    return hex.ToString();
}

此代码摘自: Python hmac和C#hmac

编辑2

某些输入/输出:

C#(使用上述说明中提供的第二种方法)

输入:呼叫者ID1495610997apiKey3 * _& E#N @ B1)O)-1Y

输出:1ecded2b66e152f0965adb96727d96b8f5db588a

Python

输入:呼叫者ID1495610997apiKey3 * _& E#N @ B1)O)-1Y

输出:bf11a12bbac84737a39152048e299fa54710d24e

C#(使用上述说明中提供的第一种方法)

输入:callerId1495611935 apiKey {[B {+％P)s; WD5& 5x

输出:7e81e0d40ff83faf1173394930443654a2b39cb3

Python

输入:callerId1495611935 apiKey {[B {+％P)s; WD5& 5x

输出:512158bbdbc78b1f25f67e963fefdc8b6cbcd741

解决方案

C#:

public static string Hash(string input)
{
    using (SHA1Managed sha1 = new SHA1Managed())
    {
        var hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));
        var sb = new StringBuilder(hash.Length * 2);

        foreach (byte b in hash)
        {
            sb.Append(b.ToString("x2")); // x2 is lowercase
        }

        return sb.ToString().ToLower();
    }
}

public static void Main()
{
    var x  ="callerId1495611935​apiKey{[B{+%P)s;WD5&5x";
    Console.WriteLine(Hash(x)); // prints 7e81e0d40ff83faf1173394930443654a2b39cb3
}

Python

import hashlib
s = u'callerId1495611935​apiKey{[B{+%P)s;WD5&5x'
enc = s.encode('utf-8') # encode in utf8
hash = hashlib.sha1(enc)
formatted = h.hexdigest()
print(formatted) # prints 7e81e0d40ff83faf1173394930443654a2b39cb3

---

您的主要问题是，对于C#和Python中的同一字符串，您正在使用不同的编码.两种语言都使用UTF8，并使用相同的大小写.输出是相同的.

请注意，在您的输入字符串(在callerId1495611935和apiKey{[B{+%P)s;WD5&5x之间)中，有一个隐藏

This code is taken from: Hashing with SHA1 Algorithm in C#

Another way

public string ToHexString(string myString)
{
    HMACSHA1 hmSha1 = new HMACSHA1();
    Byte[] hashMe = new ASCIIEncoding().GetBytes(myString);
    Byte[] hmBytes = hmSha1.ComputeHash(hashMe);
    StringBuilder hex = new StringBuilder(hmBytes.Length * 2);
    foreach (byte b in hmBytes)
    {
        hex.AppendFormat("{0:x2}", b);
    }
    return hex.ToString();
}

This code is taken from: Python hmac and C# hmac

EDIT 2

Some input/output:

C# (using second method provided in above description)

input: callerId1495610997apiKey3*_&E#N@B1)O)-1Y

output: 1ecded2b66e152f0965adb96727d96b8f5db588a

Python

input: callerId1495610997apiKey3*_&E#N@B1)O)-1Y

output: bf11a12bbac84737a39152048e299fa54710d24e

C# (using first method provided in above description)

input: callerId1495611935​apiKey{[B{+%P)s;WD5&5x

output: 7e81e0d40ff83faf1173394930443654a2b39cb3

Python

input: callerId1495611935​apiKey{[B{+%P)s;WD5&5x

output: 512158bbdbc78b1f25f67e963fefdc8b6cbcd741

解决方案

C#:

public static string Hash(string input)
{
    using (SHA1Managed sha1 = new SHA1Managed())
    {
        var hash = sha1.ComputeHash(Encoding.UTF8.GetBytes(input));
        var sb = new StringBuilder(hash.Length * 2);

        foreach (byte b in hash)
        {
            sb.Append(b.ToString("x2")); // x2 is lowercase
        }

        return sb.ToString().ToLower();
    }
}

public static void Main()
{
    var x  ="callerId1495611935​apiKey{[B{+%P)s;WD5&5x";
    Console.WriteLine(Hash(x)); // prints 7e81e0d40ff83faf1173394930443654a2b39cb3
}

Python

import hashlib
s = u'callerId1495611935​apiKey{[B{+%P)s;WD5&5x'
enc = s.encode('utf-8') # encode in utf8
hash = hashlib.sha1(enc)
formatted = h.hexdigest()
print(formatted) # prints 7e81e0d40ff83faf1173394930443654a2b39cb3

---

Your main problem is that you are using different encodings for the same string in C# and Python. Use UTF8 in both languages and use the same casing. The output is the same.

Note that inside your input string (between callerId1495611935 and apiKey{[B{+%P)s;WD5&5x) there is an hidden \u200b character. That's why encoding your string in UTF-8 gives a different result than encoding it using ASCII. Does that character have to be inside your string?

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