aws-config: replaced ring with sha1 crate (#4547)

Fixes awslabs/aws-sdk-rust#1317 removing the
dependency on `ring`

---------

Co-authored-by: Landon James <lnj@amazon.com>

Author: markuskobler

.changelog/sha1-lib.md

@@ -0,0 +1,13 @@
+---
+applies_to:
+  - aws-sdk-rust
+authors:
+  - markuskobler
+references:
+  - aws-sdk-rust#1317
+breaking: false
+new_feature: false
+bug_fix: false
+---
+
+Change sha1 calculation in aws-config from ring to sha1 crate.

aws/rust-runtime/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "aws-config"
-version = "1.8.14"
+version = "1.8.15"
 authors = [
     "AWS Rust SDK Team <aws-sdk-rust@amazon.com>",
     "Russell Cohen <rcoh@amazon.com>",
@@ -24,7 +24,7 @@ rt-tokio = ["aws-smithy-async/rt-tokio", "aws-smithy-runtime/rt-tokio", "tokio/r
 client-hyper = ["aws-smithy-runtime/default-https-client"]
 rustls = ["client-hyper"]
 default-https-client = ["aws-smithy-runtime/default-https-client"]
-sso = ["dep:aws-sdk-sso", "dep:aws-sdk-ssooidc", "dep:ring", "dep:hex", "dep:zeroize", "aws-smithy-runtime-api/http-auth"]
+sso = ["dep:aws-sdk-sso", "dep:aws-sdk-ssooidc", "dep:sha1", "dep:hex", "dep:zeroize", "aws-smithy-runtime-api/http-auth"]
 credentials-login = [
     "dep:aws-sdk-signin",
     "dep:sha2",
@@ -66,7 +66,7 @@ fastrand = "2.3.0"
 
 # implementation detail of SSO credential caching
 aws-sdk-sso = { path = "../../sdk/build/aws-sdk/sdk/sso", default-features = false, optional = true }
-ring = { version = "0.17.5", optional = true }
+sha1 = { version = "0.10", optional = true }
 hex = { version = "0.4.3", optional = true }
 zeroize = { version = "1", optional = true }
 

aws/rust-runtime/aws-config/Cargo.toml

@@ -11,7 +11,7 @@ use aws_smithy_json::serialize::JsonObjectWriter;
 use aws_smithy_types::date_time::{DateTimeFormatError, Format};
 use aws_smithy_types::DateTime;
 use aws_types::os_shim_internal::{Env, Fs};
-use ring::digest;
+use sha1::{Digest, Sha1};
 use std::borrow::Cow;
 use std::error::Error as StdError;
 use std::fmt;
@@ -140,10 +140,7 @@ fn cached_token_path(identifier: &str, home: &str) -> PathBuf {
     let mut out = PathBuf::with_capacity(home.len() + "/.aws/sso/cache".len() + ".json".len() + 40);
     out.push(home);
     out.push(".aws/sso/cache");
-    out.push(hex::encode(digest::digest(
-        &digest::SHA1_FOR_LEGACY_USE_ONLY,
-        identifier.as_bytes(),
-    )));
+    out.push(hex::encode(Sha1::digest(identifier.as_bytes())));
     out.set_extension("json");
     out
 }