From fed77c99f6885ab003c6fcdf1eb3a1e32de7c157 Mon Sep 17 00:00:00 2001
From: hitalin <hitalin@proton.me>
Date: Thu, 16 Jul 2026 23:46:41 +0900
Subject: [PATCH] =?UTF-8?q?feat(keychain):=20Linux=20=E3=81=A7=20secret-se?=
 =?UTF-8?q?rvice=20=E3=82=92=E5=84=AA=E5=85=88=E3=82=B7=E3=83=BC=E3=82=AF?=
 =?UTF-8?q?=E3=83=AC=E3=83=83=E3=83=88=E3=82=B9=E3=83=88=E3=82=A2=E3=81=AB?=
 =?UTF-8?q?=E3=81=99=E3=82=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

GUI デスクトップに原則存在する secret-service (gnome-keyring / KWallet)
を keyutils より優先し、at-rest 暗号化 + 再起動永続を得る
(hitalin/notedeck#786)。

選択は D-Bus 接続可否ではなく roundtrip probe で行う。WSL2 の
gnome-keyring のように「daemon は応答するが default collection が無く
書込だけ失敗する」中間状態があり、接続成功だけで選ぶと永続と誤認する
ため (実機で確認)。probe に失敗した環境は従来どおり keyutils に劣化し、
再起動非永続なので DB フォールバックが正となる (notedeck#785 の
is_persistent() ゲートにそのまま乗る)。

secret-service が使える環境では、既存の lazy migration が DB の平文
トークンを secret-service へ載せ替えて DB をクリアする。

zbus-secret-service-keyring-store 0.3 (keyring-core 0.7 互換, pure Rust)
を rt-async-io-crypto-rust で採用 — openssl 非依存、tokio と実行時競合
しない。

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 Cargo.lock      | 643 +++++++++++++++++++++++++++++++++++++++++++++++-
 Cargo.toml      |   2 +
 src/keychain.rs |  57 ++++-
 3 files changed, 694 insertions(+), 8 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 80779ac..b512daa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,6 +8,17 @@ version = "0.11.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fe438c63458706e03479442743baae6c88256498e6431708f6dfc520a26515d3"
 
+[[package]]
+name = "aes"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
+dependencies = [
+ "cfg-if",
+ "cipher",
+ "cpufeatures",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.4"
@@ -112,6 +123,126 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "async-broadcast"
+version = "0.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "435a87a52755b8f27fcf321ac4f04b2802e337c8c4872923137471ec39c37532"
+dependencies = [
+ "event-listener",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-channel"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "924ed96dd52d1b75e9c1a3e6275715fd320f5f9439fb5a4a11fa51f4221158d2"
+dependencies = [
+ "concurrent-queue",
+ "event-listener-strategy",
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-executor"
+version = "1.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c96bf972d85afc50bf5ab8fe2d54d1586b4e0b46c97c50a0c9e71e2f7bcd812a"
+dependencies = [
+ "async-task",
+ "concurrent-queue",
+ "fastrand",
+ "futures-lite",
+ "pin-project-lite",
+ "slab",
+]
+
+[[package]]
+name = "async-io"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "456b8a8feb6f42d237746d4b3e9a178494627745c3c56c6ea55d92ba50d026fc"
+dependencies = [
+ "autocfg",
+ "cfg-if",
+ "concurrent-queue",
+ "futures-io",
+ "futures-lite",
+ "parking",
+ "polling",
+ "rustix",
+ "slab",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "async-lock"
+version = "3.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "290f7f2596bd5b78a9fec8088ccd89180d7f9f55b94b0576823bbbdc72ee8311"
+dependencies = [
+ "event-listener",
+ "event-listener-strategy",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "async-process"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc50921ec0055cdd8a16de48773bfeec5c972598674347252c0399676be7da75"
+dependencies = [
+ "async-channel",
+ "async-io",
+ "async-lock",
+ "async-signal",
+ "async-task",
+ "blocking",
+ "cfg-if",
+ "event-listener",
+ "futures-lite",
+ "rustix",
+]
+
+[[package]]
+name = "async-recursion"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b43422f69d8ff38f95f1b2bb76517c91589a924d1559a0e935d7c8ce0274c11"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "async-signal"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52b5aaafa020cf5053a01f2a60e8ff5dccf550f0f77ec54a4e47285ac2bab485"
+dependencies = [
+ "async-io",
+ "async-lock",
+ "atomic-waker",
+ "cfg-if",
+ "futures-core",
+ "futures-io",
+ "rustix",
+ "signal-hook-registry",
+ "slab",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "async-task"
+version = "4.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
+
 [[package]]
 name = "async-trait"
 version = "0.1.89"
@@ -129,6 +260,12 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "autocfg"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2032f911046de80f0a198e0901378627c33f59ea0ac00e363d481118bd70a53"
+
 [[package]]
 name = "axum"
 version = "0.8.8"
@@ -202,6 +339,28 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "block-padding"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8894febbff9f758034a5b8e12d87918f56dfc64a8e1fe757d65e29041538d93"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "blocking"
+version = "1.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e83f8d02be6967315521be875afa792a316e28d57b5a2d401897e2a7921b7f21"
+dependencies = [
+ "async-channel",
+ "async-task",
+ "futures-io",
+ "futures-lite",
+ "piper",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.2"
@@ -220,6 +379,15 @@ version = "1.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e748733b7cbc798e1434b6ac524f0c1ff2ab456fe201501e6497c8417a4fc33"
 
+[[package]]
+name = "cbc"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26b52a9543ae338f279b96b0b9fed9c8093744685043739079ce85cd58f289a6"
+dependencies = [
+ "cipher",
+]
+
 [[package]]
 name = "cc"
 version = "1.2.56"
@@ -248,6 +416,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "613afe47fcd5fac7ccf1db93babcb082c5994d996f20b8b159f2ad1658eb5724"
 
+[[package]]
+name = "cipher"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
+dependencies = [
+ "crypto-common",
+ "inout",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.60"
@@ -314,6 +492,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "concurrent-queue"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "core-foundation"
 version = "0.10.1"
@@ -339,6 +526,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61803da095bee82a81bb1a452ecc25d3b2f1416d1897eb86430c6159ef717c17"
+
 [[package]]
 name = "crypto-common"
 version = "0.1.7"
@@ -391,6 +584,7 @@ checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer",
  "crypto-common",
+ "subtle",
 ]
 
 [[package]]
@@ -425,6 +619,33 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "endi"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "66b7e2430c6dff6a955451e2cfc438f09cea1965a9d6f87f7e3b90decc014099"
+
+[[package]]
+name = "enumflags2"
+version = "0.7.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1027f7680c853e056ebcec683615fb6fbbc07dbaa13b4d5d9442b146ded4ecef"
+dependencies = [
+ "enumflags2_derive",
+ "serde",
+]
+
+[[package]]
+name = "enumflags2_derive"
+version = "0.7.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67c78a4d8fdf9953a5c9d458f9efe940fd97a0cab0941c075a813ac594733827"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -441,6 +662,27 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "event-listener"
+version = "5.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e13b66accf52311f30a0db42147dadea9850cb48cd070028831ae5f5d4b856ab"
+dependencies = [
+ "concurrent-queue",
+ "parking",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "event-listener-strategy"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8be9f3dfaaffdae2972880079a491a1a8bb7cbed0b8dd7a347f668b4150a3b93"
+dependencies = [
+ "event-listener",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "fallible-iterator"
 version = "0.3.0"
@@ -534,6 +776,19 @@ version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cecba35d7ad927e23624b22ad55235f2239cfa44fd10428eecbeba6d6a717718"
 
+[[package]]
+name = "futures-lite"
+version = "2.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f78e10609fe0e0b3f4157ffab1876319b5b0db102a2c60dc4626306dc46b44ad"
+dependencies = [
+ "fastrand",
+ "futures-core",
+ "futures-io",
+ "parking",
+ "pin-project-lite",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.32"
@@ -679,6 +934,30 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc0fef456e4baa96da950455cd02c081ca953b141298e41db3fc7e36b1da849c"
 
+[[package]]
+name = "hex"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
+
+[[package]]
+name = "hkdf"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b5f8eb2ad728638ea2c7d47a21db23b7b58a72ed6a38256b8a1849f15fbbdf7"
+dependencies = [
+ "hmac",
+]
+
+[[package]]
+name = "hmac"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c49c37c09c17a53d937dfbb742eb3a961d65a994e6bcdcf37e7399d0cc8ab5e"
+dependencies = [
+ "digest",
+]
+
 [[package]]
 name = "http"
 version = "1.4.0"
@@ -907,6 +1186,16 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "inout"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
+dependencies = [
+ "block-padding",
+ "generic-array",
+]
+
 [[package]]
 name = "ipnet"
 version = "2.11.0"
@@ -1080,6 +1369,15 @@ version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
+[[package]]
+name = "memoffset"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "488016bfae457b036d996092f6cb448677611ce4449e970ceaf42695203f218a"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "mime"
 version = "0.3.17"
@@ -1147,6 +1445,7 @@ dependencies = [
  "uuid",
  "windows-native-keyring-store",
  "wiremock",
+ "zbus-secret-service-keyring-store",
  "zeroize",
 ]
 
@@ -1159,12 +1458,84 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "num"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35bd024e8b2ff75562e5f34e7f4905839deb4b22955ef5e73d2fea1b9813cb23"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c89e69e7e0f03bea5ef08013795c25018e101932225a656383bd384495ecc367"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf97ec579c3c42f953ef76dbf8d55ac91fb219dde70e49aa4a6b7d74e9919050"
 
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-iter"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c92800bd69a1eac91786bcfe9da64a897eb72911b8dc3095decbd07429e8048b"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "num_cpus"
 version = "1.17.0"
@@ -1199,6 +1570,22 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
+[[package]]
+name = "ordered-stream"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9aa2b01e1d916879f73a53d01d1d6cee68adbb31d6d9177a8cfce093cced1d50"
+dependencies = [
+ "futures-core",
+ "pin-project-lite",
+]
+
+[[package]]
+name = "parking"
+version = "2.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f38d5652c16fde515bb1ecef450ab0f6a219d619a7274976324d5e377f7dceba"
+
 [[package]]
 name = "paste"
 version = "1.0.15"
@@ -1223,12 +1610,37 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "piper"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c835479a4443ded371d6c535cbfd8d31ad92c5d23ae9770a61bc155e4992a3c1"
+dependencies = [
+ "atomic-waker",
+ "fastrand",
+ "futures-io",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7edddbd0b52d732b21ad9a5fab5c704c14cd949e5e9a1ec5929a24fded1b904c"
 
+[[package]]
+name = "polling"
+version = "3.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d0e4f59085d47d8241c88ead0f274e8a0cb551f3625263c05eb8dd897c34218"
+dependencies = [
+ "cfg-if",
+ "concurrent-queue",
+ "hermit-abi",
+ "pin-project-lite",
+ "rustix",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "potential_utf"
 version = "0.1.4"
@@ -1263,6 +1675,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "proc-macro-crate"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e67ba7e9b2b56446f1d419b1d807906278ffa1a658a8a5d8a39dcb1f5a78614f"
+dependencies = [
+ "toml_edit 0.25.13+spec-1.1.0",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -1620,6 +2041,25 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "secret-service"
+version = "5.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a62d7f86047af0077255a29494136b9aaaf697c76ff70b8e49cded4e2623c14"
+dependencies = [
+ "aes",
+ "cbc",
+ "futures-util",
+ "generic-array",
+ "getrandom 0.2.17",
+ "hkdf",
+ "num",
+ "once_cell",
+ "serde",
+ "sha2",
+ "zbus",
+]
+
 [[package]]
 name = "security-framework"
 version = "3.7.0"
@@ -1703,6 +2143,17 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "serde_repr"
+version = "0.1.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175ee3e80ae9982737ca543e96133087cbd9a485eecc3bc4de9c1a37b47ea59c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "serde_spanned"
 version = "0.6.9"
@@ -1735,6 +2186,17 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.10.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7507d819769d01a365ab707794a4084392c824f54a7a6a7862f8c3d0892b283"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -1750,6 +2212,16 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c4db69cba1110affc0e9f7bcd48bbf87b3f4fc7c61fc9155afd4c469eb3d6c1b"
+dependencies = [
+ "errno",
+ "libc",
+]
+
 [[package]]
 name = "siphasher"
 version = "1.0.2"
@@ -2054,8 +2526,8 @@ checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
 dependencies = [
  "serde",
  "serde_spanned",
- "toml_datetime",
- "toml_edit",
+ "toml_datetime 0.6.11",
+ "toml_edit 0.22.27",
 ]
 
 [[package]]
@@ -2067,6 +2539,15 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "toml_datetime"
+version = "1.1.1+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3165f65f62e28e0115a00b2ebdd37eb6f3b641855f9d636d3cd4103767159ad7"
+dependencies = [
+ "serde_core",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.22.27"
@@ -2076,9 +2557,30 @@ dependencies = [
  "indexmap",
  "serde",
  "serde_spanned",
- "toml_datetime",
+ "toml_datetime 0.6.11",
  "toml_write",
- "winnow",
+ "winnow 0.7.15",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.25.13+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6975367e4d2ef766d86af01ffad14b622fecc8d4357a998fbc4deb6e9bacaf9b"
+dependencies = [
+ "indexmap",
+ "toml_datetime 1.1.1+spec-1.1.0",
+ "toml_parser",
+ "winnow 1.0.4",
+]
+
+[[package]]
+name = "toml_parser"
+version = "1.1.2+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2abe9b86193656635d2411dc43050282ca48aa31c2451210f4202550afb7526"
+dependencies = [
+ "winnow 1.0.4",
 ]
 
 [[package]]
@@ -2226,6 +2728,17 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
 
+[[package]]
+name = "uds_windows"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f6fb2847f6742cd76af783a2a2c49e9375d0a111c7bef6f71cd9e738c72d6e"
+dependencies = [
+ "memoffset",
+ "tempfile",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "unicase"
 version = "2.9.0"
@@ -2324,6 +2837,7 @@ checksum = "b672338555252d43fd2240c714dc444b8c6fb0a5c5335e65a07bba7742735ddb"
 dependencies = [
  "getrandom 0.4.1",
  "js-sys",
+ "serde_core",
  "wasm-bindgen",
 ]
 
@@ -2791,6 +3305,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "winnow"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b97319f7b8343df12cc98938e5c3eb436064524c8d2b4e30a1d3a36eecdf81"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "wiremock"
 version = "0.6.5"
@@ -2931,6 +3454,78 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zbus"
+version = "5.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a28b97f866896a4be7aefd2b5a8e01bb6773d19a775d54ab28b4d094b9a4480e"
+dependencies = [
+ "async-broadcast",
+ "async-executor",
+ "async-io",
+ "async-lock",
+ "async-process",
+ "async-recursion",
+ "async-task",
+ "async-trait",
+ "blocking",
+ "enumflags2",
+ "event-listener",
+ "futures-core",
+ "futures-lite",
+ "hex",
+ "libc",
+ "ordered-stream",
+ "rustix",
+ "serde",
+ "serde_repr",
+ "tracing",
+ "uds_windows",
+ "uuid",
+ "windows-sys 0.61.2",
+ "winnow 1.0.4",
+ "zbus_macros",
+ "zbus_names",
+ "zvariant",
+]
+
+[[package]]
+name = "zbus-secret-service-keyring-store"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f9eaa71bfd72ff7ee11e747174d666ff0b9fcaa4b1df94ca119e7e64703d77f1"
+dependencies = [
+ "keyring-core",
+ "secret-service",
+ "zbus",
+]
+
+[[package]]
+name = "zbus_macros"
+version = "5.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e05ad887425eecf5e8384dc2406a4a9313eb73468712fc1cdea362eb4fe0469"
+dependencies = [
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "zbus_names",
+ "zvariant",
+ "zvariant_utils",
+]
+
+[[package]]
+name = "zbus_names"
+version = "4.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1039ca249fee9559680f3a9f05b55e0761fee51af4f6c1e7d8c1f31e549721d2"
+dependencies = [
+ "serde",
+ "winnow 1.0.4",
+ "zvariant",
+]
+
 [[package]]
 name = "zerocopy"
 version = "0.8.40"
@@ -3016,3 +3611,43 @@ name = "zmij"
 version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8848ee67ecc8aedbaf3e4122217aff892639231befc6a1b58d29fff4c2cabaa"
+
+[[package]]
+name = "zvariant"
+version = "5.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7cf057bb00bf5c9ad77abb6147b0ca4818236a1858416e9d988e40d6322fefa7"
+dependencies = [
+ "endi",
+ "enumflags2",
+ "serde",
+ "winnow 1.0.4",
+ "zvariant_derive",
+ "zvariant_utils",
+]
+
+[[package]]
+name = "zvariant_derive"
+version = "5.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8118ca6bda77bfc0ab51d660db0c955f2505eef854c9a449435bccb616933b31"
+dependencies = [
+ "proc-macro-crate",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "zvariant_utils",
+]
+
+[[package]]
+name = "zvariant_utils"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90cb9383f9b45290407a1258b202d3f8f01db719eb60b4e4055c6375af4fc7c7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde",
+ "syn",
+ "winnow 1.0.4",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 490c60c..42166ac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -51,6 +51,7 @@ windows-native-keyring-store = { version = "0.5", optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
 linux-keyutils-keyring-store = { version = "0.2", optional = true }
+zbus-secret-service-keyring-store = { version = "0.3", features = ["rt-async-io-crypto-rust"], optional = true }
 
 [features]
 default = ["keyring"]
@@ -60,5 +61,6 @@ keyring = [
     "dep:apple-native-keyring-store",
     "dep:windows-native-keyring-store",
     "dep:linux-keyutils-keyring-store",
+    "dep:zbus-secret-service-keyring-store",
 ]
 specta = ["dep:specta"]
diff --git a/src/keychain.rs b/src/keychain.rs
index 31bd1a6..478b20d 100644
--- a/src/keychain.rs
+++ b/src/keychain.rs
@@ -33,6 +33,18 @@ pub fn init_store() -> Result<(), NoteDeckError> {
     }
     #[cfg(target_os = "linux")]
     {
+        // secret-service (gnome-keyring / KWallet) が実際に使える場合のみ優先する:
+        // at-rest 暗号化 + 再起動永続 (notedeck#786)。GUI デスクトップには原則存在する。
+        // D-Bus 接続成功だけでは不十分 — WSL2 等では daemon がいても default collection
+        // が無く「書込だけ」失敗するため、roundtrip probe で書いて読めることを確認する。
+        // 使えない環境はカーネル keyutils に劣化する。keyutils は再起動非永続
+        // (UntilReboot) のため DB フォールバックが正になる (notedeck#785)
+        if let Ok(store) = zbus_secret_service_keyring_store::Store::new() {
+            if probe_roundtrip(&store) {
+                keyring_core::set_default_store(store);
+                return Ok(());
+            }
+        }
         let store = linux_keyutils_keyring_store::Store::new()
             .map_err(|e| NoteDeckError::Keychain(e.to_string()))?;
         keyring_core::set_default_store(store);
@@ -40,6 +52,23 @@ pub fn init_store() -> Result<(), NoteDeckError> {
     Ok(())
 }
 
+/// store に実際に書いて読めるか確認する。接続可否ではなく roundtrip で判定するのは、
+/// secret-service が「接続は成功するが collection が無く書込不能」という中間状態を
+/// 取りうるため (WSL2 の gnome-keyring 等)。
+#[cfg(all(feature = "keyring", target_os = "linux"))]
+fn probe_roundtrip(store: &std::sync::Arc<zbus_secret_service_keyring_store::Store>) -> bool {
+    use keyring_core::api::CredentialStoreApi;
+    let Ok(entry) = store.build(SERVICE, "__store_probe__", None) else {
+        return false;
+    };
+    if entry.set_password("probe").is_err() {
+        return false;
+    }
+    let ok = matches!(entry.get_password().as_deref(), Ok("probe"));
+    let _ = entry.delete_credential();
+    ok
+}
+
 /// 現在の credential store が再起動をまたいで永続するかどうか。
 ///
 /// Linux の keyutils store はカーネルメモリ常駐（`UntilReboot`）のため false。
@@ -97,18 +126,38 @@ pub fn init_store() -> Result<(), NoteDeckError> {
 mod tests {
     use super::*;
 
-    /// Linux の keyutils store は UntilReboot なので、init 前後どちらでも
-    /// is_persistent() は false を返す（DB フォールバックを消してはならない)
+    /// is_persistent() が選択された store と整合すること。
+    /// secret-service が使える環境では永続 (true)、keyutils 劣化時は
+    /// 再起動非永続 (false) で DB フォールバックを消してはならない
     #[test]
-    fn is_persistent_is_false_on_linux() {
+    fn is_persistent_matches_selected_store() {
         assert!(
             !is_persistent(),
             "store 未設定時は安全側 (false) に倒すこと"
         );
         if init_store().is_ok() {
-            assert!(!is_persistent(), "keyutils store は再起動非永続");
+            let vendor = keyring_core::get_default_store()
+                .expect("init_store 成功後は default store が存在する")
+                .vendor();
+            if vendor.to_lowercase().contains("keyutils") {
+                assert!(!is_persistent(), "keyutils store は再起動非永続");
+            } else {
+                assert!(is_persistent(), "secret-service store は永続: {vendor}");
+            }
         }
     }
+
+    /// 実環境の keyring に対する roundtrip。実データを触るため手動実行専用。
+    #[test]
+    #[ignore = "実環境の keyring を触るため手動実行: cargo test -- --ignored"]
+    fn roundtrip_against_real_store() {
+        init_store().unwrap();
+        let id = "test-notecli-roundtrip";
+        store_token(id, "dummy-token").unwrap();
+        assert_eq!(get_token(id).unwrap().as_deref(), Some("dummy-token"));
+        delete_token(id).unwrap();
+        assert_eq!(get_token(id).unwrap(), None);
+    }
 }
 
 #[cfg(not(feature = "keyring"))]