Cockatrice/libcockatrice_protocol/libcockatrice/protocol
Lukas Brübach 709233d977
[Security] Add challenge-response auth with scrypt verifiers and stop storing plaintext passwords
Challenge-response authentication: the client derives a scrypt verifier
(RFC 7914, EVP_PBE_scrypt, N=32768, r=8, p=1) and authenticates with
HMAC-SHA256(key, nonce), so neither the password nor its hash is
transmitted. The stored format becomes
"$scrypt$<n>$<r>$<p>$<salt>$<verifier>" and Response_PasswordSalt
now carries the cost parameters. Strict servers only accept scrypt
verifiers; legacy accounts are migrated after a successful login.

Fix #344 for challenge-response servers: a saved profile stores the
derived verifier under the password key instead of the plaintext password.
The connect dialog loads it without revealing it, autoconnect passes it
through, the change-password dialog no longer prefills the old password
field with it, and the client only persists the verifier when
"Save password" is checked.

Took 3 minutes

Took 1 minute

Took 10 seconds

Took 7 minutes
2026-09-06 16:16:22 +02:00
..
pb [Security] Add challenge-response auth with scrypt verifiers and stop storing plaintext passwords 2026-09-06 16:16:22 +02:00
debug_pb_message.cpp Split trice_limits.h into dedicated headers (#7025) 2026-06-29 14:37:52 -07:00
debug_pb_message.h Turn Card, Deck_List, Protocol, RNG, Network (Client, Server), Settings and Utility into libraries and remove cockatrice_common. (#6212) 2025-10-09 07:36:12 +02:00
featureset.cpp [Security] Add challenge-response auth with scrypt verifiers and stop storing plaintext passwords 2026-09-06 16:16:22 +02:00
featureset.h [Cleanup] Unused #includes (#6367) 2025-11-29 18:53:11 +01:00
get_pb_extension.cpp style: Add braces to all control flow statements (#6887) 2026-05-16 19:19:53 +02:00
get_pb_extension.h Turn Card, Deck_List, Protocol, RNG, Network (Client, Server), Settings and Utility into libraries and remove cockatrice_common. (#6212) 2025-10-09 07:36:12 +02:00
pending_command.cpp [Network] Measure real server round-trip times (#7153) 2026-08-23 00:03:52 +02:00
pending_command.h [Network] Measure real server round-trip times (#7153) 2026-08-23 00:03:52 +02:00