Initial commit for GitHub migration based on spice2x-25-03-03

src/spice2x/api/resources/python/spiceapi/rc4.py

@@ -0,0 +1,24 @@
+
+
+def rc4_ksa(key):
+    n = len(key)
+    j = 0
+    s_box = list(range(256))
+    for i in range(256):
+        j = (j + s_box[i] + key[i % n]) % 256
+        s_box[i], s_box[j] = s_box[j], s_box[i]
+    return s_box
+
+
+def rc4_prga(s_box):
+    i = 0
+    j = 0
+    while True:
+        i = (i + 1) % 256
+        j = (j + s_box[i]) % 256
+        s_box[i], s_box[j] = s_box[j], s_box[i]
+        yield s_box[(s_box[i] + s_box[j]) % 256]
+
+
+def rc4(key):
+    return rc4_prga(rc4_ksa(key))