pbkdf2: remove default simple feature (#336)

I suspect that most users of this crate care about the low-level
`pbkdf2` API as opposed to the higher-level password hashing API which
implements the PHC string format.

The `simple` API pulls in quite a few dependencies (to the point I'm
encountering dependency conflicts).

Author: tarcieri

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "bcrypt-pbkdf"
-version = "0.9.0" # Also update html_root_url in lib.rs when bumping this
+version = "0.10.0-pre" # Also update html_root_url in lib.rs when bumping this
 description = "bcrypt-pbkdf password-based key derivation function"
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"
@@ -14,7 +14,7 @@ rust-version = "1.57"
 
 [dependencies]
 blowfish = { version = "0.9.1", features = ["bcrypt"] }
-pbkdf2 = { version = "0.11", default-features = false, path = "../pbkdf2" }
+pbkdf2 = { version = "=0.12.0-pre", default-features = false, path = "../pbkdf2" }
 sha2 = { version = "0.10.2", default-features = false }
 zeroize = { version = "1", default-features = false, optional = true }
 

bcrypt-pbkdf/Cargo.toml

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Changed
+- `simple` feature is no longer enabled by default ([#336])
+
+[#336]: https://github.com/RustCrypto/password-hashes/pull/336
+
 ## 0.11.0 (2022-03-28)
 ### Changed
 - Bump `password-hash` dependency to v0.4; MSRV 1.57 ([#283])

pbkdf2/CHANGELOG.md

@@ -1,6 +1,6 @@
 [package]
 name = "pbkdf2"
-version = "0.11.0"
+version = "0.12.0-pre"
 authors = ["RustCrypto Developers"]
 license = "MIT OR Apache-2.0"
 description = "Generic implementation of PBKDF2"
@@ -30,7 +30,6 @@ sha2 = "0.10"
 streebog = "0.10"
 
 [features]
-default = ["simple"]
 parallel = ["rayon", "std"]
 simple = ["hmac", "password-hash", "sha2"]
 std = ["password-hash/std"]

pbkdf2/Cargo.toml

@@ -14,7 +14,7 @@ rust-version = "1.57"
 
 [dependencies]
 hmac = "0.12.1"
-pbkdf2 = { version = "0.11", default-features = false, path = "../pbkdf2" }
+pbkdf2 = { version = "=0.12.0-pre", default-features = false, path = "../pbkdf2" }
 salsa20 = { version = "0.10.2", default-features = false }
 sha2 = { version = "0.10", default-features = false }