fix(core): sigv4ConfigResolver access client creds to instantiate signer

Author: kuhe

clients/client-sts/src/STSClient.ts

@@ -323,7 +323,7 @@ export class STSClient extends __Client<
     const _config_4 = resolveRegionConfig(_config_3);
     const _config_5 = resolveHostHeaderConfig(_config_4);
     const _config_6 = resolveEndpointConfig(_config_5);
-    const _config_7 = resolveHttpAuthSchemeConfig(_config_6);
+    const _config_7 = resolveHttpAuthSchemeConfig(_config_6, { client: () => this });
     const _config_8 = resolveRuntimeExtensions(_config_7, configuration?.extensions || []);
     super(_config_8);
     this.config = _config_8;

clients/client-sts/src/auth/httpAuthSchemeProvider.ts

@@ -158,10 +158,11 @@ export interface HttpAuthSchemeResolvedConfig extends StsAuthResolvedConfig, Aws
  * @internal
  */
 export const resolveHttpAuthSchemeConfig = <T>(
-  config: T & HttpAuthSchemeInputConfig & AwsSdkSigV4PreviouslyResolved
+  config: T & HttpAuthSchemeInputConfig & AwsSdkSigV4PreviouslyResolved,
+  { client }: { client: () => { config: AwsSdkSigV4AuthResolvedConfig } }
 ): T & HttpAuthSchemeResolvedConfig => {
   const config_0 = resolveStsAuthConfig(config);
-  const config_1 = resolveAwsSdkSigV4Config(config_0);
+  const config_1 = resolveAwsSdkSigV4Config(config_0, client());
   return {
     ...config_1,
   } as T & HttpAuthSchemeResolvedConfig;

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/auth/http/integration/AwsSdkCustomizeSigV4Auth.java

@@ -185,6 +185,7 @@ public void customizeSupportedHttpAuthSchemes(
                         .namespace(AwsDependency.AWS_SDK_CORE.getPackageName(), "/")
                         .addDependency(AwsDependency.AWS_SDK_CORE)
                         .build())
+                    .addArgs(List.of("client()"))
                     .inputConfig(Symbol.builder()
                         .name("AwsSdkSigV4AuthInputConfig")
                         .namespace(AwsDependency.AWS_SDK_CORE.getPackageName(), "/")

packages/core/src/submodules/httpAuthSchemes/aws_sdk/resolveAwsSdkSigV4Config.ts

@@ -102,7 +102,10 @@ export interface AwsSdkSigV4AuthResolvedConfig {
  * @internal
  */
 export const resolveAwsSdkSigV4Config = <T>(
-  config: T & AwsSdkSigV4AuthInputConfig & AwsSdkSigV4PreviouslyResolved
+  config: T & AwsSdkSigV4AuthInputConfig & AwsSdkSigV4PreviouslyResolved,
+  client?: {
+    config: AwsSdkSigV4AuthResolvedConfig;
+  }
 ): T & AwsSdkSigV4AuthResolvedConfig => {
   let isUserSupplied = false;
   // Normalize credentials
@@ -208,7 +211,7 @@ export const resolveAwsSdkSigV4Config = <T>(
 
       const params: SignatureV4Init & SignatureV4CryptoInit = {
         ...config,
-        credentials: boundCredentialsProvider,
+        credentials: client?.config.credentials ?? boundCredentialsProvider,
         region: config.signingRegion,
         service: config.signingName,
         sha256,