Adding upstream version 1.5.0.upstream/1.5.0upstream

Signed-off-by: Daniel Baumann <daniel@debian.org>

12 files changed, 1009 insertions, 0 deletions

diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
new file mode 100644
index 0000000..865a291
--- /dev/null
+++ b/.cargo_vcs_info.json
@@ -0,0 +1,6 @@
+{
+  "git": {
+    "sha1": "4184f8ef58a6f148f1dda5c83dcf2a98962f541e"
+  },
+  "path_in_vcs": ""
+}
\ No newline at end of file
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..e8d486a
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "cargo" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
new file mode 100644
index 0000000..62c0014
--- /dev/null
+++ b/.github/workflows/check.yml
@@ -0,0 +1,79 @@
+name: check
+on:
+  push:
+    branches:
+      - "*"
+    tags:
+      - "*"
+  pull_request:
+    branches:
+      - "*"
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - macos-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          components: clippy, rustfmt
+      - name: Check format
+        run: cargo fmt --all -- --check
+      - name: Check fix
+        run: cargo fix && cargo fix
+      - name: Check with clippy
+        run: cargo clippy --all -- -D warnings
+      - name: Build Release
+        run: cargo build --release --all-features
+      - name: Run tests
+        run: cargo test  --all-features --all
+
+      # build on nightly
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          override: true
+      - name: Build on nightly
+        run: cargo build --release --all-features
+  windows-vcpkg:
+    name: windows-vcpkg
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: sfackler/actions/rustup@master
+      - run: echo "version=$(rustc --version)" >> $GITHUB_OUTPUT
+        id: rust-version
+      - run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append
+      - run: vcpkg install openssl:x64-windows-static-md
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          components: clippy, rustfmt
+      - name: Check format
+        run: cargo fmt --all -- --check
+      - name: Check fix
+        run: cargo fix && cargo fix
+      - name: Check with clippy
+        run: cargo clippy --all -- -D warnings
+      - name: Build Release
+        run: cargo build --release
+      - name: Run tests
+        run: cargo test  --all-features --all
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          override: true
+      - name: Build on nightly
+        run: cargo build --release
+
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..b9e3741
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,24 @@
+name: Deploy
+on:
+  push:
+    tags:
+      - "*"
+
+jobs:
+  # Publish starship to Crates.io
+  cargo_publish:
+    name: Publish Cargo Package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup | Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+
+      - name: Build | Publish
+        run: cargo publish --token ${{ secrets.CRATES_GITHUB_TOKEN }}
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..617f798
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+target/
+.idea/
+Cargo.lock
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..e6f1ea4
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,64 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2018"
+name = "sha256"
+version = "1.5.0"
+authors = ["baoyachi <liaoymxsdl@gmail.com>"]
+description = "sha256 crypto digest"
+readme = "README.md"
+keywords = [
+    "sha256",
+    "hash",
+    "digest",
+]
+categories = ["cryptography"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/baoyachi/sha256-rs"
+
+[dependencies.async-trait]
+version = "0.1.68"
+
+[dependencies.bytes]
+version = "1.4.0"
+
+[dependencies.hex]
+version = "0.4.2"
+
+[dependencies.openssl]
+version = "0.10.54"
+optional = true
+default-features = false
+
+[dependencies.sha2]
+version = "0.10.6"
+default-features = false
+
+[dependencies.tokio]
+version = "1.28.2"
+features = [
+    "io-util",
+    "fs",
+]
+optional = true
+
+[dev-dependencies.tokio]
+version = "1.28.2"
+features = ["full"]
+
+[dev-dependencies.tokio-test]
+version = "0.4.2"
+
+[features]
+async = ["tokio"]
+default = ["async"]
+native_openssl = ["openssl"]
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
new file mode 100644
index 0000000..d8f4b9a
--- /dev/null
+++ b/Cargo.toml.orig
@@ -0,0 +1,30 @@
+[package]
+name = "sha256"
+version = "1.5.0"
+authors = ["baoyachi <liaoymxsdl@gmail.com>"]
+edition = "2018"
+description = "sha256 crypto digest"
+keywords = ["sha256", "hash", "digest"]
+readme = "README.md"
+categories = ["cryptography"]
+repository = "https://github.com/baoyachi/sha256-rs"
+license = "MIT OR Apache-2.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+hex = "0.4.2"
+sha2 = { version = "0.10.6", default-features = false }
+openssl = { version = "0.10.54", optional = true, default-features = false }
+async-trait = "0.1.68"
+tokio = { version = "1.28.2", optional = true, features = ["io-util", "fs"] }
+bytes = "1.4.0"
+
+[features]
+default = ["async"]
+native_openssl = ["openssl"]
+async = ["tokio"]
+
+[dev-dependencies]
+tokio = { version = "1.28.2", features = ["full"] }
+tokio-test = "0.4.2"
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..db1a289
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
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+      "Legal Entity" shall mean the union of the acting entity and all
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+      outstanding shares, or (iii) beneficial ownership of such entity.
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+      "Work" shall mean the work of authorship, whether in Source or
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+      institute patent litigation against any entity (including a
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+          of the NOTICE file are for informational purposes only and
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+          notices within Derivative Works that You distribute, alongside
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+          that such additional attribution notices cannot be construed
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [2022] [baoyachi of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..4ff994c
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,20 @@
+Copyright (c) 2021-present baoyachi and others
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e338789
--- /dev/null
+++ b/README.md
@@ -0,0 +1,57 @@
+# sha256 crypto digest
+
+[docsrs]: https://docs.rs/sha256
+
+[![GitHub Actions](https://github.com/baoyachi/sha256-rs/workflows/check/badge.svg)](https://github.com/baoyachi/sha256-rs/actions?query=workflow%3Abuild)
+[![Crates.io](https://img.shields.io/crates/v/sha256.svg)](https://crates.io/crates/sha256)
+[![Docs.rs](https://docs.rs/sha256/badge.svg)](https://docs.rs/sha256)
+[![Download](https://img.shields.io/crates/d/sha256)](https://crates.io/crates/sha256)
+
+
+## Examples
+
+#### sha256 digest function
+
+```rust
+use sha256::digest;
+
+fn main() {
+    let input = String::from("hello");
+    let val = digest(input);
+    assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+    
+    //sha256 digest &str
+    let input = "hello";
+    let val = digest(input);
+    assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+    
+    //sha256 digest &mut &str
+    let mut input = "hello";
+    let val = digest(&mut input);
+    assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+    
+    //sha256 digest char
+    let mut input = "π";
+    let val = digest(input);
+    assert_eq!(val,"2617fcb92baa83a96341de050f07a3186657090881eae6b833f66a035600f35a");
+
+
+    let input = b"hello";
+    let val = digest(input);
+    assert_eq!(val, "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+}
+```
+
+#### sha256 try_digest function
+
+```rust
+use sha256::try_digest;
+use std::path::Path;
+
+fn main() {
+    let input = Path::new("./foo.file");
+    let val = try_digest(input).unwrap();
+    assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1");
+}
+```
+
diff --git a/foo.file b/foo.file
new file mode 100644
index 0000000..53bab1d
--- /dev/null
+++ b/foo.file
@@ -0,0 +1 @@
+hello sha256
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..94ec155
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,513 @@
+//! sha256 crypto digest util
+//!
+//! ```rust
+//!
+//! use sha256::{digest, try_digest};
+//!
+//! //sha256 digest String
+//! let input = String::from("hello");
+//! let val = digest(input);
+//! assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+//!
+//! //sha256 digest &str
+//! let input = "hello";
+//! let val = digest(input);
+//! assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+//!
+//! //sha256 digest &mut &str
+//! let mut input = "hello";
+//! let val = digest(&mut input);
+//! assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+//!
+//! //sha256 digest char
+//! let mut input = "π";
+//! let val = digest(input);
+//! assert_eq!(val,"2617fcb92baa83a96341de050f07a3186657090881eae6b833f66a035600f35a");
+//!
+//! //sha256 digest bytes
+//! let input = b"hello";
+//! let val = digest(input);
+//! assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824");
+//!
+//! //sha256 digest file
+//! use std::path::Path;
+//! let input = Path::new("./foo.file");
+//! let val = try_digest(input).unwrap();
+//! assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1");
+//!
+//! ```
+
+#[cfg(feature = "native_openssl")]
+use crate::openssl_sha256::OpenSslSha256;
+
+#[cfg(feature = "async")]
+pub use async_digest::*;
+use sha2::digest::Output;
+use sha2::{Digest, Sha256};
+use std::fmt::Debug;
+use std::fs;
+use std::io;
+use std::io::{BufReader, Read};
+use std::path::Path;
+
+/// sha256 digest string
+///
+/// # Examples
+///
+/// ```rust
+/// use sha256::digest;
+/// let input = "hello";
+/// let val = digest(input);
+/// assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824")
+/// ```
+///
+pub fn digest<D: Sha256Digest>(input: D) -> String {
+    input.digest()
+}
+
+/// sha256 digest file
+///
+/// # Examples
+///
+/// ```rust
+/// use sha256::try_digest;
+/// use std::path::Path;
+/// let input = Path::new("./foo.file");
+/// let val = try_digest(input).unwrap();
+/// assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1")
+/// ```
+pub fn try_digest<D: TrySha256Digest>(input: D) -> Result<String, D::Error> {
+    input.digest()
+}
+
+/// sha256 digest bytes
+///
+/// # Examples
+///
+/// ```rust
+/// use sha256::digest_bytes;
+/// let input = b"hello";
+/// let val = digest_bytes(input);
+/// assert_eq!(val,"2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824")
+/// ```
+///
+#[deprecated(since = "1.1.0", note = "Use new function `digest()` instead")]
+pub fn digest_bytes(input: &[u8]) -> String {
+    __digest__(input)
+}
+
+/// sha256 digest file
+///
+/// # Examples
+///
+/// ```rust
+/// use sha256::digest_file;
+/// use std::path::Path;
+/// let input = Path::new("./foo.file");
+/// let val = digest_file(input).unwrap();
+/// assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1")
+/// ```
+#[deprecated(since = "1.1.0", note = "Use new function `try_digest()` instead")]
+pub fn digest_file<P: AsRef<Path>>(path: P) -> Result<String, io::Error> {
+    let bytes = fs::read(path)?;
+    Ok(__digest__(&bytes))
+}
+
+pub trait Sha256Digest {
+    fn digest(self) -> String;
+}
+
+#[async_trait::async_trait]
+pub trait TrySha256Digest {
+    type Error: Debug;
+
+    fn digest(self) -> Result<String, Self::Error>;
+
+    #[cfg(feature = "async")]
+    async fn async_digest(self) -> Result<String, Self::Error>;
+
+    #[cfg(feature = "native_openssl")]
+    async fn async_openssl_digest(self) -> Result<String, Self::Error>;
+}
+
+impl<const N: usize> Sha256Digest for &[u8; N] {
+    fn digest(self) -> String {
+        __digest__(self)
+    }
+}
+
+impl Sha256Digest for &[u8] {
+    fn digest(self) -> String {
+        __digest__(self)
+    }
+}
+
+impl Sha256Digest for &Vec<u8> {
+    fn digest(self) -> String {
+        __digest__(self)
+    }
+}
+
+impl Sha256Digest for Vec<u8> {
+    fn digest(self) -> String {
+        __digest__(&self)
+    }
+}
+
+impl Sha256Digest for String {
+    fn digest(self) -> String {
+        __digest__(self.as_bytes())
+    }
+}
+
+impl Sha256Digest for &str {
+    fn digest(self) -> String {
+        __digest__(self.as_bytes())
+    }
+}
+
+impl Sha256Digest for char {
+    fn digest(self) -> String {
+        __digest__(self.encode_utf8(&mut [0; 4]).as_bytes())
+    }
+}
+
+impl Sha256Digest for &mut &str {
+    fn digest(self) -> String {
+        __digest__(self.as_bytes())
+    }
+}
+
+impl Sha256Digest for &String {
+    fn digest(self) -> String {
+        __digest__(self.as_bytes())
+    }
+}
+
+#[async_trait::async_trait]
+impl<P> TrySha256Digest for P
+where
+    P: AsRef<Path> + Send,
+{
+    type Error = io::Error;
+
+    fn digest(self) -> Result<String, Self::Error> {
+        let f = fs::File::open(self)?;
+        let reader = BufReader::new(f);
+        let sha = Sha256::new();
+        calc(reader, sha)
+    }
+
+    #[cfg(feature = "async")]
+    async fn async_digest(self) -> Result<String, Self::Error> {
+        let f = tokio::fs::File::open(self).await?;
+        let reader = tokio::io::BufReader::new(f);
+        let sha = Sha256::new();
+        async_calc(reader, sha).await
+    }
+
+    #[cfg(all(feature = "async", feature = "native_openssl"))]
+    async fn async_openssl_digest(self) -> Result<String, Self::Error> {
+        let f = tokio::fs::File::open(self).await?;
+        let reader = tokio::io::BufReader::new(f);
+        let sha = OpenSslSha256::new();
+        async_calc(reader, sha).await
+    }
+}
+
+fn __digest__(data: &[u8]) -> String {
+    hex::encode(Sha256::digest(data))
+}
+
+trait CalculatorInput {
+    fn read_inner(&mut self, buf: &mut [u8]) -> std::io::Result<usize>;
+}
+
+impl<T> CalculatorInput for T
+where
+    T: Read,
+{
+    fn read_inner(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        self.read(buf)
+    }
+}
+
+pub trait CalculatorSelector {
+    type FinishType: AsRef<[u8]>;
+    fn update_inner(&mut self, data: &[u8]);
+    fn finish_inner(self) -> Self::FinishType;
+}
+
+impl CalculatorSelector for Sha256 {
+    type FinishType = Output<Sha256>;
+
+    fn update_inner(&mut self, data: &[u8]) {
+        self.update(data)
+    }
+
+    fn finish_inner(self) -> Self::FinishType {
+        self.finalize()
+    }
+}
+
+fn calc<I, S>(mut input: I, mut selector: S) -> io::Result<String>
+where
+    I: CalculatorInput,
+    S: CalculatorSelector,
+{
+    let mut buf = [0u8; 1024];
+    loop {
+        let len = input.read_inner(&mut buf)?;
+        if len == 0 {
+            break;
+        }
+        selector.update_inner(&buf[0..len]);
+    }
+    let hash = selector.finish_inner();
+    Ok(hex::encode(hash))
+}
+
+#[cfg(feature = "async")]
+pub mod async_digest {
+    use crate::{CalculatorSelector, TrySha256Digest};
+    use bytes::BytesMut;
+    use std::io;
+
+    /// sha256 digest file
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use sha256::{try_async_digest};
+    /// use std::path::Path;
+    /// let input = Path::new("./foo.file");
+    /// tokio_test::block_on(async{
+    /// let val = try_async_digest(input).await.unwrap();
+    /// assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1")
+    /// });
+    ///
+    /// ```
+    pub async fn try_async_digest<D: TrySha256Digest>(input: D) -> Result<String, D::Error> {
+        input.async_digest().await
+    }
+
+    /// sha256 digest file
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// use sha256::{try_async_openssl_digest};
+    /// use std::path::Path;
+    /// let input = Path::new("./foo.file");
+    /// tokio_test::block_on(async{
+    /// let val = try_async_openssl_digest(input).await.unwrap();
+    /// assert_eq!(val,"433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1")
+    /// });
+    /// ```
+    #[cfg(feature = "native_openssl")]
+    pub async fn try_async_openssl_digest<D: TrySha256Digest>(
+        input: D,
+    ) -> Result<String, D::Error> {
+        input.async_openssl_digest().await
+    }
+
+    #[async_trait::async_trait]
+    pub trait AsyncCalculatorInput {
+        async fn read_inner(&mut self, buf: &mut BytesMut) -> io::Result<usize>;
+    }
+
+    pub async fn async_calc<I, S>(mut input: I, mut selector: S) -> io::Result<String>
+    where
+        I: AsyncCalculatorInput,
+        S: CalculatorSelector,
+    {
+        let mut buf = BytesMut::with_capacity(1024);
+        loop {
+            buf.clear();
+            let len = input.read_inner(&mut buf).await?;
+            if len == 0 {
+                break;
+            }
+            selector.update_inner(&buf[0..len]);
+        }
+        let hash = selector.finish_inner();
+        Ok(hex::encode(hash))
+    }
+
+    #[async_trait::async_trait]
+    impl<R> AsyncCalculatorInput for tokio::io::BufReader<R>
+    where
+        R: tokio::io::AsyncRead + Unpin + Send,
+    {
+        async fn read_inner(&mut self, buf: &mut BytesMut) -> io::Result<usize> {
+            use tokio::io::AsyncReadExt;
+
+            self.read_buf(buf).await
+        }
+    }
+}
+
+#[cfg(feature = "native_openssl")]
+mod openssl_sha256 {
+    use crate::CalculatorSelector;
+
+    pub type OpenSslSha256 = openssl::sha::Sha256;
+
+    impl CalculatorSelector for OpenSslSha256 {
+        type FinishType = [u8; 32];
+
+        fn update_inner(&mut self, data: &[u8]) {
+            self.update(data)
+        }
+
+        fn finish_inner(self) -> Self::FinishType {
+            self.finish()
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[cfg(feature = "native_openssl")]
+    #[test]
+    fn test_openssl() {
+        let input = Path::new("./foo.file");
+        let f = fs::File::open(input).unwrap();
+        let reader = BufReader::new(f);
+        let sha = openssl::sha::Sha256::new();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            calc(reader, sha).unwrap()
+        );
+    }
+
+    #[test]
+    fn test_sha256() {
+        let input = Path::new("./foo.file");
+        let f = fs::File::open(input).unwrap();
+        let reader = BufReader::new(f);
+        let sha = Sha256::new();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            calc(reader, sha).unwrap()
+        );
+    }
+
+    #[cfg(all(feature = "async", feature = "native_openssl"))]
+    #[tokio::test]
+    async fn test_async_openssl() {
+        let input = Path::new("./foo.file");
+        let f = tokio::fs::File::open(input).await.unwrap();
+        let reader = tokio::io::BufReader::new(f);
+        let sha = openssl::sha::Sha256::new();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            async_calc(reader, sha).await.unwrap()
+        );
+    }
+
+    #[cfg(feature = "async")]
+    #[tokio::test]
+    async fn test_async() {
+        let input = Path::new("./foo.file");
+        let f = tokio::fs::File::open(input).await.unwrap();
+        let reader = tokio::io::BufReader::new(f);
+        let sha = Sha256::new();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            async_calc(reader, sha).await.unwrap()
+        );
+    }
+
+    #[cfg(all(feature = "async", feature = "native_openssl"))]
+    #[tokio::test]
+    async fn test_try_async_openssl_digest() {
+        let hash = try_async_openssl_digest("./foo.file").await.unwrap();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            hash
+        );
+    }
+
+    #[cfg(feature = "async")]
+    #[tokio::test]
+    async fn test_try_async_digest() {
+        let hash = try_async_digest("./foo.file").await.unwrap();
+        assert_eq!(
+            "433855b7d2b96c23a6f60e70c655eb4305e8806b682a9596a200642f947259b1",
+            hash
+        );
+    }
+
+    #[cfg(feature = "async")]
+    #[tokio::test]
+    async fn test_async_parity() {
+        let bytes = (0..0x1000).map(|v| (v % 256) as u8).collect::<Vec<_>>();
+        let val = digest(&bytes);
+
+        let async_res = {
+            let bytes = &bytes;
+            // We want to force Poll::Pending on reads during async_calc, which may break parity
+            // between sync and async hashing.
+            let (client, mut server) = tokio::io::duplex(64);
+            let reader = tokio::io::BufReader::new(client);
+            let sha = Sha256::new();
+
+            use tokio::io::AsyncWriteExt;
+            tokio::join! {
+                async_calc(reader, sha),
+                async move {
+                    server.write_all(&bytes[..]).await.unwrap();
+                    core::mem::drop(server);
+                }
+            }
+            .0
+            .unwrap()
+        };
+
+        let sync_res = {
+            let reader = BufReader::new(&*bytes);
+            let sha = Sha256::new();
+            calc(reader, sha).unwrap()
+        };
+        assert_eq!(val, async_res);
+        assert_eq!(async_res, sync_res);
+    }
+
+    #[cfg(all(feature = "async", feature = "native_openssl"))]
+    #[tokio::test]
+    async fn test_async_parity_openssl() {
+        let bytes = (0..0x1000).map(|v| (v % 256) as u8).collect::<Vec<_>>();
+        let val = digest(&bytes);
+
+        let async_res = {
+            let bytes = &bytes;
+            // We want to force Poll::Pending on reads during async_calc, which may break parity
+            // between sync and async hashing.
+            let (client, mut server) = tokio::io::duplex(64);
+            let reader = tokio::io::BufReader::new(client);
+            let sha = OpenSslSha256::new();
+
+            use tokio::io::AsyncWriteExt;
+            tokio::join! {
+                async_calc(reader, sha),
+                async move {
+                    server.write_all(&bytes[..]).await.unwrap();
+                    core::mem::drop(server);
+                }
+            }
+            .0
+            .unwrap()
+        };
+
+        let sync_res = {
+            let reader = BufReader::new(&*bytes);
+            let sha = OpenSslSha256::new();
+            calc(reader, sha).unwrap()
+        };
+        assert_eq!(val, async_res);
+        assert_eq!(async_res, sync_res);
+    }
+}