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709233d977
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
19 lines
723 B
Protocol Buffer
19 lines
723 B
Protocol Buffer
syntax = "proto2";
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import "response.proto";
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message Response_PasswordSalt {
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extend Response {
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optional Response_PasswordSalt ext = 1017;
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}
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optional string password_salt = 1;
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// scrypt cost parameters for password_salt. Absent/zero for legacy accounts.
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optional int32 n = 2;
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optional int32 r = 3;
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optional int32 p = 4;
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// Server-generated challenge. When present the client must authenticate
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// with a challenge-response instead of transmitting the password hash.
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optional bytes nonce = 5;
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// True when the account still uses the legacy password format and should
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// be migrated to the scrypt format after a successful login.
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optional bool needs_migration = 6;
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}
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