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Code: Alles auswählen

def rc4crypt(data, key):
    x = 0
    box = range(256)
    for i in range(256):
        x = (x + box[i] + ord(key[i % len(key)])) % 256
        box[i], box[x] = box[x], box[i]
    x = 0
    y = 0
    out = []
    for char in data:
        x = (x + 1) % 256
        y = (y + box[x]) % 256
        box[x], box[y] = box[y], box[x]
        out.append(chr(ord(char) ^ box[(box[x] + box[y]) % 256]))

    return ''.join(out)

Code: Alles auswählen

        static byte[] rc4crypt(byte[] data,byte[] key)
        {
            byte[] ret = new byte[data.Length];
            byte[] box = new byte[256];
            int x = 0, y = 0, i = 0;
            byte  temp = 0;

            for (x = 0; x < 256; x++)
            {
                box[x] = (byte)x;
            }

            for (i = 0; i < 256; i++)
            {
                x = (x + box[i] + key[i % key.Length]) % 256;
                temp = box[i];
                box[i] = box[x];
                box[x] = temp;
            }

            x = y = 0;

            for(i=0;i<data.Length;i++)
            {
                x = (x + 1) % 256;
                y = (y + box[x]) % 256;
                temp = box[y];
                box[y] = box[x];
                box[x] = temp;
                ret[i] = (byte)(data[i] ^ box[(box[x] + box[y]) % 256]);
            }

            return ret;
        }