将 C# 转换为 Python base64 编码

Question

I am trying to convert a function from C# to python.

My C# code:

static string Base64Encode(string plainText)
{
    char[] arr = plainText.ToCharArray();
    List<byte> code16 = new List<byte>();
    int i = 1;
    string note = "";
    foreach (char row in arr)
    {
        if (i == 1)
        {
            note += "0x" + row;
        }
        else if (i == 2)
        {
            note += row;
            code16.Add(Convert.ToByte(note, 16));
            note = "";
            i = 0;
        }

        i++;
    }
    return System.Convert.ToBase64String(code16.ToArray());
}

My Python code:

def Base64Ecode(plainText):
    code16 = []
    i = 1
    note = ''
    for row in plainText:
        if i == 1:
            note += '0x' + row
        elif i == 2:
            note += row
            code16.append(int(note, 16))
            note = ''
            i = 0
        i += 1
    test = ''
    for blah in code16:
        test += chr(blah)

    print(base64.b64encode(test.encode()))

Both code16 values are the same but I have an issue when I try to base64 encode the data. C# takes a byte array but pyton takes a string and I am getting two different results.

Answer 1

string.encode() uses the utf-8 encoding by default, which probably creates some multi-byte chars you don't want.

Use string.encode("latin1") to create bytes from 00 to FF .

That said, there is an easier method in python to convert a Hex-String to a bytearray (or bytes object):

base64.b64encode(bytes.fromhex(plainText))

gives the same result as your function.