def generate_ep(vid, ep):
f_code_1 = 'becaf9be'
f_code_2 = 'bf7e5f01'
def trans_e(a, c):
f = h = 0
b = list(range(256))
result = ''
while h < 256:
f = (f + b[h] + ord(a[h % len(a)])) % 256
b[h], b[f] = b[f], b[h]
h += 1
q = f = h = 0
while q < len(c):
h = (h + 1) % 256
f = (f + b[h]) % 256
b[h], b[f] = b[f], b[h]
if isinstance(c[q], int):
result += chr(c[q] ^ b[(b[h] + b[f]) % 256])
else:
result += chr(ord(c[q]) ^ b[(b[h] + b[f]) % 256])
q += 1
return result
e_code = trans_e(f_code_1, base64.b64decode(ep))
sid, token = e_code.split('_')
new_ep = trans_e(f_code_2, '%s_%s_%s' % (sid, vid, token))
return base64.b64encode(bytes(new_ep, 'latin')), sid, token
#return base64.b64encode(new_ep)
string e_code = trans_e(f_code_1, Convert.FromBase64String(ep));
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string new_ep = trans_e(f_code_2, sid + "_" + vid + "_" + token))
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string dbase64 = new string(Convert.FromBase64String(ep));
string e_code = trans_e(f_code_1, dbase64);
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