C#•7mo ago

✅ attempting to encrypt with ECB

hello. i am trying to encrypt some data however i get different results from what im doing in python as a test here is the python code

def hexaescrypt(data, key):
    """ returns hex string of aes encrypted data """
    c = AES.new(key.encode(), AES.MODE_ECB)
    a = b2a_hex(c.encrypt(data))
    print(a)
    return a

def hexaescrypt(data, key):
    """ returns hex string of aes encrypted data """
    c = AES.new(key.encode(), AES.MODE_ECB)
    a = b2a_hex(c.encrypt(data))
    print(a)
    return a

and here is my recreated c# code

  public static byte[] genAESCrypt(byte[] data, byte[] key)
        {
            using Aes myAes = Aes.Create();
            myAes.Mode = CipherMode.ECB;
            myAes.Padding = PaddingMode.PKCS7;
            myAes.Key = key;
            var encryptor = myAes.CreateEncryptor();
            var encryptedBytes = encryptor.TransformFinalBlock(data, 0, data.Length);
            return encryptedBytes;
        }

  public static byte[] genAESCrypt(byte[] data, byte[] key)
        {
            using Aes myAes = Aes.Create();
            myAes.Mode = CipherMode.ECB;
            myAes.Padding = PaddingMode.PKCS7;
            myAes.Key = key;
            var encryptor = myAes.CreateEncryptor();
            var encryptedBytes = encryptor.TransformFinalBlock(data, 0, data.Length);
            return encryptedBytes;
        }

here is my starting bytes

98AD3BBBBE513C6C350912819A7A6FE4A46232396461383831623535303762343965306431393935373830356435376563A431A433353939363839A437A40000

after encryption in python

376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44

after encryption in c#

B9161861D4B8C6BFFCF574172E570426A3CC72635D3D58656203B4DF436B0FE41C8A962418F61E3AB2D9B1179CFF0F727C469775A7E6C17E780AFC9A7AB3EB443D0D871C865D5449AB015558F784802F

i know the python implementation is correct.

59 Replies

The Fog from Human Resources•7mo ago

You seem to be adding a padding in the C# version but not the Py version

Ronald WayneOP•7mo ago

iirc python auto pads i think

The Fog from Human Resources•7mo ago

But what mode

Ronald WayneOP•7mo ago

not sure

The Fog from Human Resources•7mo ago

Everything must match in order to get the same result I assume it's the padding If your AES is hashed in a third party lib maybe consider switching to a built in class

Ronald WayneOP•7mo ago

aes needs padding of / 16 bytes right? my source bytes should match that

The Fog from Human Resources•7mo ago

I'm not sure The iirc AES can have a variable prefix and key length as long as they match a specific pattern and length guideline

Ronald WayneOP•7mo ago

Ill have to look later as its 4am rn and ive been working on this since 1am

The Fog from Human Resources•7mo ago

Aight

Anton•7mo ago

Are you encrypting strings? Maybe the encoding is different

canton7•7mo ago

What key are you using for your test, so we can try and replicate? It also looks like the Python key is a string? (From the .encode()). You don't show how you're turning the C# string into a byte array

Ronald WayneOP•7mo ago

The previous function already returns a byte array

canton7•7mo ago

What's "the previous function"?

Ronald WayneOP•7mo ago

Im calculating a byte array given some other data In that other function

canton7•7mo ago

OK, and do you want to share that function with us, so that we can see if it does the same as the Python code does? The key being different is one possible cause of your problem Also:

What key are you using for your test, so we can try and replicate?

Ronald WayneOP•7mo ago

Ive already verified the bytearrays are the same. I will get the key soon but i havent been able to get to my pc yet

Shazanman•7mo ago

I think you meant achieve deterministic AES encryption?

canton7•7mo ago

I've no idea what that means...

Shazanman•7mo ago

You need to use specific modes which allow IV inputs

canton7•7mo ago

ECB doesn't use an IV

Shazanman•7mo ago

yes that's the issue

canton7•7mo ago

Is it?

Shazanman•7mo ago

well if he's trying to achieve deteministic encryption Comparing output from AES encryption is useless imo Isn't encryption supposed to be getting random data in the first place?

canton7•7mo ago

AES is always deterministic. The fact that he hasn't set the IV shouldn't be an issue, as ECB doesn't use the IV No. If you encrypt the same thing with the same key and same parameters, you should get identical output

Shazanman•7mo ago

but are the modes same and those parameters?

canton7•7mo ago

Obviously something is different, as the output is different

Ronald WayneOP•7mo ago

the key is "jo6aey6haid2Teih"

Shazanman•7mo ago

and both implementations use the same key?

Ronald WayneOP•7mo ago

yeah

canton7•7mo ago

For anyone else looking at this, repro: https://sharplab.io/#v2:EYLgtghglgdgNAFxAJwK4wD4AEBMBGAWACgsAGAAizwDoBlAUwGNVkoEBPagYWXYAcEAewDmyCHwAW7ANzEylGgBV6ADwSyixAG4Rk5WH1QJyAXnJdBMLfWQJqAMWSCwACVW0ErGMIAUAIgBOAA4AQQARAGYAIRiogFEAVjwIrgA2LgiE0gC8HCC8AJCAdhDU+ziAFhCK1JwIuoDUmuSgiNa8Wsyu0giizoqIxoSI0iaI5IDBrqK2kcyx4b6E1Ijq8bWIrsnJldbCgZKK0mPSPwBKDR09AGt6dlNyOJhGQQATWGFqENouAElf6gAcXoCCi7AQ9AAzv4AFaCVIQO6pCTQV44ZRQCTnDTaXTkQRGQzGMzCegwEJxH68AQ+AxGODkW7sC5yAo+CxWGx2RSCNwqDxeXwEhBEs4szQkDrkYDg+gAbQAuuRSeTKTx+AgfDKIYryK8IAgIAztfKlUyzsQAN7Eci2ygUEJQ8hgdiOyEPN3cZD0A30Hziu3O11Q6gAWTe9AeXCgkhs4de9GocS4UQ0gZdnoAChBXu9vA9s7mPvHE5mANJcWhFNN2jMhst3B5Mmu2uuQ6i/ABqDxg9AA7tLZXKOgqW+QruQyYxqUI9GY216fRCntONYJkP6xxOpzP6K8wRD3WYd2vkNRFGIYJCAGbrsD2WAQAA2USfgkY1x8+sNDNIDO/EDUAAMmSwgIBIAZ2lgRSTs8u77rKkIaAAvsQrIBP4gA8G4AIPvYkAA===

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C#/VB/F# compiler playground.

canton7•7mo ago

FWIW, using a CryptoStream has the same result: https://sharplab.io/#v2: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canton7•7mo ago

@literally a cat Is that how you're turning the key string into bytes in your "other function"?

Ronald WayneOP•7mo ago

im using Encoding.UTF8.GetBytes("jo6aey6haid2Teih") for the key ok so by default python's ecb mode does not apply padding wait a sec i think my previous function might be incorrect here was the python source

def genurlkey(songid, md5origin, mediaver=4, fmt=1):
    """ Calculate the download url given the songid, origin and media+format """
    data_concat = b'\xa4'.join(_ for _ in [md5origin.encode(),
                                           str(fmt).encode(),
                                           str(songid).encode(),
                                           str(mediaver).encode()])
    data = b'\xa4'.join([md5hex(data_concat), data_concat]) + b'\xa4'
    if len(data) % 16 != 0:
        data += b'\0' * (16 - len(data) % 16)
    print(data)
    print(len(data))
    return hexaescrypt(data, "jo6aey6haid2Teih")

def genurlkey(songid, md5origin, mediaver=4, fmt=1):
    """ Calculate the download url given the songid, origin and media+format """
    data_concat = b'\xa4'.join(_ for _ in [md5origin.encode(),
                                           str(fmt).encode(),
                                           str(songid).encode(),
                                           str(mediaver).encode()])
    data = b'\xa4'.join([md5hex(data_concat), data_concat]) + b'\xa4'
    if len(data) % 16 != 0:
        data += b'\0' * (16 - len(data) % 16)
    print(data)
    print(len(data))
    return hexaescrypt(data, "jo6aey6haid2Teih")

c# rewrite wait its too long for discord

Ronald WayneOP•7mo ago

https://dotnetfiddle.net/mX2irU

C# Online Compiler | .NET Fiddle

Test your C# code online with .NET Fiddle code editor.

Ronald WayneOP•7mo ago

debug output

Ronald WayneOP•7mo ago

top is py bottom is c#

canton7•7mo ago

md5Hash and data are different between py and C# there? Python, for some awful reason, renders bytes in a bytestring as ASCII chars if it can. So b'12' is not hex '12', it's hex '31-32' That could just be a change in how you're printing those strings though, and since you haven't shared that code, I can't check

Ronald WayneOP•7mo ago

For python im just printing all variables with .encode and c# bitconverter.tostring

The Fog from Human Resources•7mo ago

Python Bad on Gang

canton7•7mo ago

Could you please share your full exact code?

Ronald WayneOP•7mo ago

     Console.WriteLine("md5originBytes: " + BitConverter.ToString(md5originBytes));
            Console.WriteLine("fmtBytes: " + BitConverter.ToString(fmtBytes));
            Console.WriteLine("songidBytes: " + BitConverter.ToString(songidBytes));
            Console.WriteLine("mediaverBytes: " + BitConverter.ToString(mediaverBytes));
            Console.WriteLine("data_concat: " + BitConverter.ToString(data_concat));
            Console.WriteLine("md5Hash: " + BitConverter.ToString(md5.ComputeHash(data_concat)));
            Console.WriteLine("data: " + BitConverter.ToString(data));
            Console.WriteLine("append: " + BitConverter.ToString(append));
            Console.WriteLine("paddedData: " + BitConverter.ToString(paddedData));
            Console.WriteLine("Length: " + paddedData.Length);

     Console.WriteLine("md5originBytes: " + BitConverter.ToString(md5originBytes));
            Console.WriteLine("fmtBytes: " + BitConverter.ToString(fmtBytes));
            Console.WriteLine("songidBytes: " + BitConverter.ToString(songidBytes));
            Console.WriteLine("mediaverBytes: " + BitConverter.ToString(mediaverBytes));
            Console.WriteLine("data_concat: " + BitConverter.ToString(data_concat));
            Console.WriteLine("md5Hash: " + BitConverter.ToString(md5.ComputeHash(data_concat)));
            Console.WriteLine("data: " + BitConverter.ToString(data));
            Console.WriteLine("append: " + BitConverter.ToString(append));
            Console.WriteLine("paddedData: " + BitConverter.ToString(paddedData));
            Console.WriteLine("Length: " + paddedData.Length);

    print("md5originBytes:", md5origin.encode())
    print("fmtBytes:", str(fmt).encode())
    print("songidBytes:", str(songid).encode())
    print("mediaverBytes:", str(mediaver).encode())
    print("data_concat:", data_concat)
    print("md5Hash:", md5hex(data_concat))
    print("data:", data)
    print("Padded data length:", len(data))

    print("md5originBytes:", md5origin.encode())
    print("fmtBytes:", str(fmt).encode())
    print("songidBytes:", str(songid).encode())
    print("mediaverBytes:", str(mediaver).encode())
    print("data_concat:", data_concat)
    print("md5Hash:", md5hex(data_concat))
    print("data:", data)
    print("Padded data length:", len(data))

canton7•7mo ago

OK, so you genuinely do print the data_concat in a different way Having a mix of str(...).encode() and not is really quite confusing there!

Ronald WayneOP•7mo ago

lemme make them all str.encode and rerun it

md5originBytes: b'b29da881b5507b49e0d19957805d57ec'
fmtBytes: b'1'
songidBytes: b'3599689'
mediaverBytes: b'7'
data_concat: b"b'b29da881b5507b49e0d19957805d57ec\\xa41\\xa43599689\\xa47'"
md5Hash: b"b'98ad3bbbbe513c6c350912819a7a6fe4'"
data: b"b'98ad3bbbbe513c6c350912819a7a6fe4\\xa4b29da881b5507b49e0d19957805d57ec\\xa41\\xa43599689\\xa47\\xa4\\x00\\x00'"
Padded data length: 80
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'

md5originBytes: b'b29da881b5507b49e0d19957805d57ec'
fmtBytes: b'1'
songidBytes: b'3599689'
mediaverBytes: b'7'
data_concat: b"b'b29da881b5507b49e0d19957805d57ec\\xa41\\xa43599689\\xa47'"
md5Hash: b"b'98ad3bbbbe513c6c350912819a7a6fe4'"
data: b"b'98ad3bbbbe513c6c350912819a7a6fe4\\xa4b29da881b5507b49e0d19957805d57ec\\xa41\\xa43599689\\xa47\\xa4\\x00\\x00'"
Padded data length: 80
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'

huh

canton7•7mo ago

Can you copy the C# strings as text as well, so I can compare, without having to open/close an image

Ronald WayneOP•7mo ago

[un@archlinux Debug]$ mono app.exe 
md5originBytes: 62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63
fmtBytes: 31
songidBytes: 33-35-39-39-36-38-39
mediaverBytes: 37
data_concat: 62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37
md5Hash: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4
data: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37
append: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37-A4
paddedData: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37-A4-00-00
Length: 64
Final Data:
0x98 0xad 0x3b 0xbb 0xbe 0x51 0x3c 0x6c 0x35 0x09 0x12 0x81 0x9a 0x7a 0x6f 0xe4 0xa4 0x62 0x32 0x39 0x64 0x61 0x38 0x38 0x31 0x62 0x35 0x35 0x30 0x37 0x62 0x34 0x39 0x65 0x30 0x64 0x31 0x39 0x39 0x35 0x37 0x38 0x30 0x35 0x64 0x35 0x37 0x65 0x63 0xa4 0x31 0xa4 0x33 0x35 0x39 0x39 0x36 0x38 0x39 0xa4 0x37 0xa4 0x00 0x00 
64
AS COMBINED
98AD3BBBBE513C6C350912819A7A6FE4A46232396461383831623535303762343965306431393935373830356435376563A431A433353939363839A437A40000
encrypting
B9161861D4B8C6BFFCF574172E570426A3CC72635D3D58656203B4DF436B0FE41C8A962418F61E3AB2D9B1179CFF0F727C469775A7E6C17E780AFC9A7AB3EB44

[un@archlinux Debug]$ mono app.exe 
md5originBytes: 62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63
fmtBytes: 31
songidBytes: 33-35-39-39-36-38-39
mediaverBytes: 37
data_concat: 62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37
md5Hash: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4
data: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37
append: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37-A4
paddedData: 98-AD-3B-BB-BE-51-3C-6C-35-09-12-81-9A-7A-6F-E4-A4-62-32-39-64-61-38-38-31-62-35-35-30-37-62-34-39-65-30-64-31-39-39-35-37-38-30-35-64-35-37-65-63-A4-31-A4-33-35-39-39-36-38-39-A4-37-A4-00-00
Length: 64
Final Data:
0x98 0xad 0x3b 0xbb 0xbe 0x51 0x3c 0x6c 0x35 0x09 0x12 0x81 0x9a 0x7a 0x6f 0xe4 0xa4 0x62 0x32 0x39 0x64 0x61 0x38 0x38 0x31 0x62 0x35 0x35 0x30 0x37 0x62 0x34 0x39 0x65 0x30 0x64 0x31 0x39 0x39 0x35 0x37 0x38 0x30 0x35 0x64 0x35 0x37 0x65 0x63 0xa4 0x31 0xa4 0x33 0x35 0x39 0x39 0x36 0x38 0x39 0xa4 0x37 0xa4 0x00 0x00 
64
AS COMBINED
98AD3BBBBE513C6C350912819A7A6FE4A46232396461383831623535303762343965306431393935373830356435376563A431A433353939363839A437A40000
encrypting
B9161861D4B8C6BFFCF574172E570426A3CC72635D3D58656203B4DF436B0FE41C8A962418F61E3AB2D9B1179CFF0F727C469775A7E6C17E780AFC9A7AB3EB44

canton7•7mo ago

What's going on there with data_concat, md5Hash, and data? The b"b'....'"?

Ronald WayneOP•7mo ago

thats from the str(...).encode

The Fog from Human Resources•7mo ago

atp i think python is giving you the wrong result :stare:

canton7•7mo ago

Ack, this is really frustrating, because you still aren't sharing your full code, so every time I spend time picking up on something, it's due to some code which you haven't shared So I'm on the edge of just giving up -- I've wasted a bunch of time on this already

Ronald WayneOP•7mo ago

ok ill just share my functions and their results just straight up gimme a sec

canton7•7mo ago

I really need to be able to run both Python and C# side by side, and spot where in the process the difference is happening But you keep changing what your MCVE is

Ronald WayneOP•7mo ago

 from Crypto.Hash import MD5
from binascii import a2b_hex, b2a_hex
from Crypto.Cipher import AES
def md5hex(data):
    """ return hex string of md5 of the given string """
    # type(data): bytes
    # returns: bytes
    h = MD5.new()
    h.update(data)
    return b2a_hex(h.digest())
def hexaescrypt(data, key):
    c = AES.new(key.encode(), AES.MODE_ECB)
    a = b2a_hex(c.encrypt(data))
    print(a)
    return a
def genurlkey(songid, md5origin, mediaver=4, fmt=1):
    data_concat = b'\xa4'.join(_ for _ in [md5origin.encode(),
                                           str(fmt).encode(),
                                           str(songid).encode(),
                                           str(mediaver).encode()])
    data = b'\xa4'.join([md5hex(data_concat), data_concat]) + b'\xa4'
    if len(data) % 16 != 0:
        data += b'\0' * (16 - len(data) % 16)
    print("md5originBytes:", md5origin.encode())
    print("fmtBytes:", str(fmt).encode())
    print("songidBytes:", str(songid).encode())
    print("mediaverBytes:", str(mediaver).encode())
    print("data_concat:", data_concat)
    print("md5Hash:", md5hex(data_concat))
    print("data:", data)
    print("Padded data length:", len(data))
    return hexaescrypt(data, "jo6aey6haid2Teih")

    
print(genurlkey("3599689","b29da881b5507b49e0d19957805d57ec",7,1))

 from Crypto.Hash import MD5
from binascii import a2b_hex, b2a_hex
from Crypto.Cipher import AES
def md5hex(data):
    """ return hex string of md5 of the given string """
    # type(data): bytes
    # returns: bytes
    h = MD5.new()
    h.update(data)
    return b2a_hex(h.digest())
def hexaescrypt(data, key):
    c = AES.new(key.encode(), AES.MODE_ECB)
    a = b2a_hex(c.encrypt(data))
    print(a)
    return a
def genurlkey(songid, md5origin, mediaver=4, fmt=1):
    data_concat = b'\xa4'.join(_ for _ in [md5origin.encode(),
                                           str(fmt).encode(),
                                           str(songid).encode(),
                                           str(mediaver).encode()])
    data = b'\xa4'.join([md5hex(data_concat), data_concat]) + b'\xa4'
    if len(data) % 16 != 0:
        data += b'\0' * (16 - len(data) % 16)
    print("md5originBytes:", md5origin.encode())
    print("fmtBytes:", str(fmt).encode())
    print("songidBytes:", str(songid).encode())
    print("mediaverBytes:", str(mediaver).encode())
    print("data_concat:", data_concat)
    print("md5Hash:", md5hex(data_concat))
    print("data:", data)
    print("Padded data length:", len(data))
    return hexaescrypt(data, "jo6aey6haid2Teih")

    
print(genurlkey("3599689","b29da881b5507b49e0d19957805d57ec",7,1))

this outputs

md5originBytes: b'b29da881b5507b49e0d19957805d57ec'
fmtBytes: b'1'
songidBytes: b'3599689'
mediaverBytes: b'7'
data_concat: b'b29da881b5507b49e0d19957805d57ec\xa41\xa43599689\xa47'
md5Hash: b'98ad3bbbbe513c6c350912819a7a6fe4'
data: b'98ad3bbbbe513c6c350912819a7a6fe4\xa4b29da881b5507b49e0d19957805d57ec\xa41\xa43599689\xa47\xa4\x00\x00'
Padded data length: 80
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'

md5originBytes: b'b29da881b5507b49e0d19957805d57ec'
fmtBytes: b'1'
songidBytes: b'3599689'
mediaverBytes: b'7'
data_concat: b'b29da881b5507b49e0d19957805d57ec\xa41\xa43599689\xa47'
md5Hash: b'98ad3bbbbe513c6c350912819a7a6fe4'
data: b'98ad3bbbbe513c6c350912819a7a6fe4\xa4b29da881b5507b49e0d19957805d57ec\xa41\xa43599689\xa47\xa4\x00\x00'
Padded data length: 80
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'
b'376bb7559e97f260b449928cac9a73b9c73597a4fa55a392d77218f357078073a3cc72635d3d58656203b4df436b0fe41c8a962418f61e3ab2d9b1179cff0f727c469775a7e6c17e780afc9a7ab3eb44'

Ronald WayneOP•7mo ago

https://dotnetfiddle.net/uyIoG1 is the c#

C# Online Compiler | .NET Fiddle

Test your C# code online with .NET Fiddle code editor.

canton7•7mo ago

Well there's one difference. In the python you do data = b'\xa4'.join([md5hex(data_concat), data_concat]) + b'\xa4', but in the C# you do byte[] md5originBytes = Encoding.UTF8.GetBytes(track_hash); Or wait, I might be confused Ah no sorry, the C# version is md5.ComputeHash(data_concat) So the python side takes the hex string of the md5, but the C# side takes the raw bytes

Ronald WayneOP•7mo ago

should i be doing BitConverter.ToString(md5.ComputeHash(data_concat)) in the list then? wait no yup that was it getting 376BB7559E97F260B449928CAC9A73B9C73597A4FA55A392D77218F357078073A3CC72635D3D58656203B4DF436B0FE41C8A962418F61E3AB2D9B1179CFF0F727C469775A7E6C17E780AFC9A7AB3EB44 from c# now thank you sm and sorry for wasting your time on this lmfao

canton7•7mo ago

Cool, glad you found it! So the statement:

here is my starting bytes 98AD3BBBBE513C6C350912819A7A6FE4A46232396461383831623535303762343965306431393935373830356435376563A431A433353939363839A437A40000

Was wrong?

Shazanman•7mo ago

looks like it was wrong

Ronald WayneOP•7mo ago

Yeah

canton7•7mo ago

Cool. I wasted about an hour trying to find that, based on the information you gave >< Next time, please make sure that the question is correct!

Gaming

Programming

✅ attempting to encrypt with ECB

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