This is an automated email from the git hooks/post-receive script. nickm pushed a commit to branch main in repository torspec. commit 5c6b282e57f866a1341eb705cb21507fcbfcc543 Author: Ian Jackson <ijackson@chiark.greenend.org.uk> AuthorDate: Mon Feb 6 12:25:55 2023 +0000 Call the key in desc-auth-ephemeral-key, KP_hs_desc_ephem Proposed by @nickm in https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/999/diffs#50f97... (I think the spec is not 100% clear that hs_y and hs_Y are *this* key, rather than some other possible ephemeral keypair the HS might have, so please would the reviewer check that this is actually true.) --- rend-spec-v3.txt | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/rend-spec-v3.txt b/rend-spec-v3.txt index a8ac264..afc2a46 100644 --- a/rend-spec-v3.txt +++ b/rend-spec-v3.txt @@ -1208,7 +1208,7 @@ Table of contents: If client authorization is disabled, the value here should be "x25519". - "desc-auth-ephemeral-key" SP key NL + "desc-auth-ephemeral-key" SP KP_hs_desc_ephem NL [Exactly once] @@ -1239,13 +1239,11 @@ Table of contents: client_x = private x25519 key of authorized client client_X = public x25519 key of authorized client - hs_y = private key of ephemeral x25519 keypair of hidden service - hs_Y = public key of ephemeral x25519 keypair of hidden service descriptor_cookie = descriptor cookie used to encrypt the descriptor And here is what the hidden service computes: - SECRET_SEED = x25519(hs_y, client_X) + SECRET_SEED = x25519(KS_hs_desc_ephem, client_X) KEYS = KDF(N_hs_subcred | SECRET_SEED, 40) CLIENT-ID = fist 8 bytes of KEYS COOKIE-KEY = last 32 bytes of KEYS -- To stop receiving notification emails like this one, please contact the administrator of this repository.