FFI: Add zxcvbn dependency for password strength evaluation

.deny.toml

@@ -47,5 +47,8 @@ allow-git = [
     "https://github.com/jplatte/const_panic",
     # A patch override for the bindings: https://github.com/smol-rs/async-compat/pull/22
     "https://github.com/element-hq/async-compat",
-    "https://github.com/mozilla/uniffi-rs"
+    "https://github.com/mozilla/uniffi-rs",
+    # Pinned one commit past 3.1.1 for the unreleased guess-magnitude
+    # overflow fix, needed by the bindings' password strength estimation.
+    "https://github.com/shssoichiro/zxcvbn-rs",
 ]

Cargo.toml

@@ -125,6 +125,7 @@ wasm-bindgen-test = { version = "0.3.55", default-features = false, features = [
 web-sys = { version = "0.3.82", default-features = false }
 wiremock = { version = "0.6.5", default-features = false }
 zeroize = { version = "1.8.2", default-features = false }
+zxcvbn = { git = "https://github.com/shssoichiro/zxcvbn-rs", rev = "4e8e784b23541d118800df84feedf8160879d1af", default-features = false }
 
 matrix-sdk = { path = "crates/matrix-sdk", version = "0.18.0", default-features = false }
 matrix-sdk-base = { path = "crates/matrix-sdk-base", version = "0.18.0" }

bindings/matrix-sdk-ffi/Cargo.toml

@@ -110,6 +110,7 @@ tracing-subscriber = { workspace = true, features = ["env-filter"] }
 url.workspace = true
 uuid = { version = "1.4.1", default-features = false, features = ["std", "v4"] }
 zeroize.workspace = true
+zxcvbn.workspace = true
 oauth2.workspace = true
 
 [target.'cfg(target_family = "wasm")'.dependencies]

bindings/matrix-sdk-ffi/changelog.d/6708.feature.md

@@ -0,0 +1 @@
+Add `PasswordStrengthEstimator` to the FFI layer, exposing password strength estimation via the zxcvbn algorithm with caller-configurable ranking thresholds.

bindings/matrix-sdk-ffi/src/lib.rs

@@ -15,6 +15,7 @@ mod identity_status_change;
 mod live_locations_observer;
 mod notification;
 mod notification_settings;
+mod password_strength;
 mod platform;
 mod qr_code;
 mod room;