We have a python web service. It needs a hash as a parameter. The hash in python is generated this way.
hashed_data = hmac.new("ant", "bat", hashlib.sha1)
print hashed_data.hexdigest()
Now, this is how I generate the hash from C#.
ASCIIEncoding encoder = new ASCIIEncoding();
Byte[] code = encoder.GetBytes("ant");
HMACSHA1 hmSha1 = new HMACSHA1(code);
Byte[] hashMe = encoder.GetBytes("bat");
Byte[] hmBytes = hmSha1.ComputeHash(hashMe);
Console.WriteLine(Convert.ToBase64String(hmBytes));
However, I'm coming out with different result.
Should I change the order of the hashing?
Thank you,
Jon
In order to print the result:
.hexdigest()
Convert.ToBase64String
Those 2 functions don't do the same thing at all. Python's hexdigest simply converts the byte array to a hex string whereas the C# method uses Base64 encoding to convert the byte array. So to get the same output simply define a function:
public static string ToHexString(byte[] array)
{
StringBuilder hex = new StringBuilder(array.Length * 2);
foreach (byte b in array)
{
hex.AppendFormat("{0:x2}", b);
}
return hex.ToString();
}
and then:
ASCIIEncoding encoder = new ASCIIEncoding();
Byte[] code = encoder.GetBytes("ant");
HMACSHA1 hmSha1 = new HMACSHA1(code);
Byte[] hashMe = encoder.GetBytes("bat");
Byte[] hmBytes = hmSha1.ComputeHash(hashMe);
Console.WriteLine(ToHexString(hmBytes));
Now you will get the same output as in Python:
739ebc1e3600d5be6e9fa875bd0a572d6aee9266
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