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local IPv6 address is calculated differently on little and big endian platforms #4

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dangowrt opened this issue Mar 20, 2024 · 0 comments
Open

local IPv6 address is calculated differently on little and big endian platforms #4

dangowrt opened this issue Mar 20, 2024 · 0 comments

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@dangowrt
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The IPv6 addresses used within the wireguard tunnels are derived from the public key. However, it seems like the derivation function is not endian-safe, so the resulting address differs e.g. on MIPS and Aarch64 platforms.
Example:

on Aarch64 (LE)

peer: NeEK/xTlBKty2RpcigGIc+243vJ+eU98o3YJXkWEG1M=
  ...
  allowed ips: fd03:6cd6:e922:344d:5305:2021:e003:a5f8/128

on MIPS (BE)

peer: NeEK/xTlBKty2RpcigGIc+243vJ+eU98o3YJXkWEG1M=
  ...
  allowed ips: fd20:a740:1e2f:7e3a:4a5c:f6d5:2f26:a64/128
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