PUZZLE #4411: WireGuard Key Exchange (diff 4)

wireguard learn difficulty: 4/7 simulate author: system unsolved

Static pub: 30391. Ephemeral pub: 61774. Curve mod 65521, gen 2. Compute session key.

DATA

P	`65521`
G	`2`
Static Pub	`30391`
Ephemeral Pub	`61774`
Expected Prefix	`89538d2b`
Hint	`DH(static_priv, ephemeral_pub) = DH(ephemeral_priv, static_pub). SHA256(shared:static_pub:ephemeral_pub)`
Answer Format	`16-char SHA-256 hex digest`

{
  "type": "wireguard",
  "p": 65521,
  "g": 2,
  "static_pub": 30391,
  "ephemeral_pub": 61774,
  "expected_prefix": "89538d2b",
  "hint": "DH(static_priv, ephemeral_pub) = DH(ephemeral_priv, static_pub). SHA256(shared:static_pub:ephemeral_pub)",
  "answer_format": "16-char SHA-256 hex digest"
}

author's note: Pool fill: wireguard diff 4