halkyon/packages/halkyon_base_client/pubspec.yaml
Tizian 「ティツィアーン」 bc499713b8
feat(crypto): SRP-6a, the register's half and the device's
ADR 0017's step 1. Generic over group and hash (SrpGroup); production
takes RFC 5054's 3072-bit group with SHA-256. k = H(N | PAD(g)),
u = H(PAD(A) | PAD(B)), K = H(PAD(S)),
M1 = H(H(N) xor H(g) | H(I) | s | PAD(A) | PAD(B) | K),
M2 = H(PAD(A) | M1 | K). A and B must lie in 1..N-1 and u must not be
0; a and b are 256 bits from Random.secure(); proofs are compared in
constant time. x comes from the caller (halkyon_keys makes it); RFC
5054's own x is there for the vectors only.

- The register's half in halkyon_base_server (base.dart: srpChallenge,
  srpVerify), the device's written by hand in halkyon_base_client
  (srp.dart: SrpClient, srpVerifier). Serverpod's generator cleans and
  writes only a client's lib/src/protocol/ (serverpod_cli 4.0.4's
  _getDirectoriesRequiringCleaning; a generate leaves srp/ untouched).
- Tests: RFC 5054 Appendix B on both halves; the client against the
  register, succeeding and every refusal.
- The module's tests depend on its client, and pub resolves every
  member's dev dependencies, so Learn's server image takes the module's
  client into its workspace too.
- The format check covers the hand-written half.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>
2026-10-22 18:11:08 +02:00

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YAML

name: halkyon_base_client
description: >-
The client side of halkyon_base, generated by Serverpod: what a Halkyon
app calls to sign in, to manage its account, and to learn an instance's
basics; and SRP-6a's client half, written by hand.
version: 0.1.0
publish_to: none
environment:
sdk: ^3.13.0
resolution: workspace
dependencies:
# SRP-6a's hashes (lib/src/srp/, hand-written beside the generated code).
crypto: ^3.0.7
meta: ^1.16.0
serverpod_auth_idp_client: 4.0.4
serverpod_client: 4.0.4
dev_dependencies:
test: ^1.31.1