tool: Add source of Go SDK's credential provider

It will be compiled as part of CI artifacts build and the built binary
will be placed in guest rootfs.

Signed-off-by: Takahiro Itazuri <[email protected]>

Author: zulinx86

resources/overlay/usr/local/bin/go_sdk_cred_provider.go/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+
+	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/config"
+)
+
+func main() {
+	cfg, err := config.LoadDefaultConfig(
+		context.TODO(),
+		config.WithClientLogMode(
+			aws.LogSigning|
+				aws.LogRetries|
+				aws.LogRequest|
+				aws.LogRequestWithBody|
+				aws.LogResponse|
+				aws.LogResponseWithBody,
+		),
+	)
+	if err != nil {
+		log.Fatalf("Unable to load config: %v", err)
+	}
+
+	cred, err := cfg.Credentials.Retrieve(context.TODO())
+	if err != nil {
+		log.Fatalf("Unable to retrieve credentials: %v", err)
+	}
+
+	fmt.Printf("%v,%v,%v\n", cred.AccessKeyID, cred.SecretAccessKey, cred.SessionToken)
+}

resources/rebuild.sh

@@ -201,7 +201,7 @@ function build_al_kernel {
 function prepare_and_build_rootfs {
     BIN_DIR=overlay/usr/local/bin
 
-    SRCS=(init.c fillmem.c fast_page_fault_helper.c readmem.c)
+    SRCS=(init.c fillmem.c fast_page_fault_helper.c readmem.c go_sdk_cred_provider.go)
     if [ $ARCH == "aarch64" ]; then
         SRCS+=(devmemread.c)
     fi