Added dependency shim for old sha1 crate (#41)

legacy-shim/.gitignore

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+/target
+/Cargo.lock

legacy-shim/Cargo.toml

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+[package]
+name = "sha1"
+version = "0.6.1"
+authors = ["Armin Ronacher <armin.ronacher@active-4.com>"]
+keywords = ["sha1"]
+description = "Minimal dependency free implementation of SHA1 for Rust."
+license = "BSD-3-Clause"
+repository = "https://github.com/mitsuhiko/sha1-smol"
+edition = "2018"
+
+[features]
+std = ["sha1_smol/std"]
+serde = ["sha1_smol/serde"]
+
+[dependencies]
+sha1_smol = "1.0.0"
+
+[package.metadata.docs.rs]
+all-features = true

legacy-shim/LICENSE

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+../LICENSE

legacy-shim/README.md

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+../README.md

legacy-shim/src/lib.rs

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+//! A minimal implementation of SHA1 for rust.
+//!
+//! This implementation supports no_std which is the default mode.  The
+//! following features are available and can be optionally enabled:
+//!
+//! * ``serde``: when enabled the `Digest` type can be serialized.
+//! * ``std``: when enabled errors from this library implement `std::error::Error`
+//!   and the `hexdigest` shortcut becomes available.
+//!
+//! **Note:** future versions of this crate with the old code are now under
+//! `sha1_smol`, the `sha1` crate name with versions beyond the 0.6 line now
+//! refer to the `RustCrypto` implementation.
+//!
+//! ## Example
+//!
+//! ```rust
+//! # fn main() {
+//!
+//! let mut m = sha1_smol::Sha1::new();
+//! m.update(b"Hello World!");
+//! assert_eq!(m.digest().to_string(),
+//!            "2ef7bde608ce5404e97d5f042f95f89f1c232871");
+//! # }
+//! ```
+//!
+//! The sha1 object can be updated multiple times.  If you only need to use
+//! it once you can also use shortcuts (requires std):
+//!
+//! ```
+//! # trait X { fn hexdigest(&self) -> &'static str { "2ef7bde608ce5404e97d5f042f95f89f1c232871" }}
+//! # impl X for sha1_smol::Sha1 {}
+//! # fn main() {
+//! assert_eq!(sha1_smol::Sha1::from("Hello World!").hexdigest(),
+//!            "2ef7bde608ce5404e97d5f042f95f89f1c232871");
+//! # }
+//! ```
+
+pub use sha1_smol::*;