Use ring for reqwest example

reqwest/Cargo.toml

@@ -21,7 +21,7 @@ sha-3 = ["digest", "dep:sha3"]
 
 [[example]]
 name = "client"
-required-features = ["default-spawner", "sha-2"]
+required-features = ["default-spawner", "ring"]
 
 [dependencies]
 async-trait = "0.1.71"

reqwest/examples/client.rs

@@ -1,9 +1,8 @@
-use http_signature_normalization_reqwest::prelude::*;
+use http_signature_normalization_reqwest::{digest::ring::Sha256, prelude::*};
 use reqwest::{
     header::{ACCEPT, USER_AGENT},
     Client,
 };
-use sha2::{Digest, Sha256};
 
 async fn request(config: Config) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let digest = Sha256::new();

reqwest/src/digest/ring.rs

@@ -1,5 +1,7 @@
 //! Types for creating digests with the `ring` cryptography library
 
+use super::DigestCreate;
+
 /// A Sha256 digest backed by ring
 #[derive(Clone)]
 pub struct Sha256 {
@@ -78,38 +80,32 @@ impl Default for Sha512 {
     }
 }
 
-#[cfg(feature = "client")]
+fn create(mut context: ring::digest::Context, input: &[u8]) -> String {
-mod client {
-    use super::*;
-    use crate::digest::DigestCreate;
-
-    fn create(mut context: ring::digest::Context, input: &[u8]) -> String {
     context.update(input);
     let digest = context.finish();
     base64::encode(digest.as_ref())
-    }
+}
 
-    impl DigestCreate for Sha256 {
+impl DigestCreate for Sha256 {
     const NAME: &'static str = "SHA-256";
 
     fn compute(&mut self, input: &[u8]) -> String {
         create(self.ctx.clone(), input)
     }
-    }
+}
 
-    impl DigestCreate for Sha384 {
+impl DigestCreate for Sha384 {
     const NAME: &'static str = "SHA-384";
 
     fn compute(&mut self, input: &[u8]) -> String {
         create(self.ctx.clone(), input)
     }
-    }
+}
 
-    impl DigestCreate for Sha512 {
+impl DigestCreate for Sha512 {
     const NAME: &'static str = "SHA-512";
 
     fn compute(&mut self, input: &[u8]) -> String {
         create(self.ctx.clone(), input)
     }
-    }
 }