Opaque: use argon2 as slow hash

app/Cargo.lock

@@ -50,6 +50,12 @@ version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "33954243bd79057c2de7338850b85983a44588021f8a5fee574a8888c6de4344"
 
+[[package]]
+name = "arrayref"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
+
 [[package]]
 name = "arrayvec"
 version = "0.5.2"
@@ -110,6 +116,17 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "blake2b_simd"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afa748e348ad3be8263be728124b24a24f268266f6f5d58af9d75f6a40b5c587"
+dependencies = [
+ "arrayref",
+ "arrayvec",
+ "constant_time_eq",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.9.0"
@@ -197,6 +214,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "constant_time_eq"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
+
 [[package]]
 name = "core-foundation"
 version = "0.9.1"
@@ -745,9 +768,12 @@ version = "0.1.0"
 dependencies = [
  "chrono",
  "curve25519-dalek",
+ "digest",
+ "generic-array",
  "getrandom 0.2.3",
  "opaque-ke",
  "rand 0.8.4",
+ "rust-argon2",
  "serde",
  "sha2",
  "sqlx",
@@ -1259,6 +1285,18 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "rust-argon2"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b18820d944b33caa75a71378964ac46f58517c92b6ae5f762636247c09e78fb"
+dependencies = [
+ "base64",
+ "blake2b_simd",
+ "constant_time_eq",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.5"