loader logic revised

client/loader/util.go

@@ -1,6 +1,7 @@
 package loader
 
 import (
+	"crypto/sha256"
 	"fmt"
 	"galaxy/connector"
 	"galaxy/util"
@@ -12,7 +13,7 @@ func resolvePluginFile(version string) string {
 	return libUIPluginFile + "-" + version
 }
 
-// latestVersion should return VersionInfo with the latest Version for the current OD
+// latestVersion should return VersionInfo with the latest Version for the current OS
 func latestVersion(versions []connector.VersionInfo) (connector.VersionInfo, bool, error) {
 	os := runtime.GOOS
 	versions = slices.DeleteFunc(versions, func(v connector.VersionInfo) bool { return v.OS != os })
@@ -37,3 +38,22 @@ func latestVersion(versions []connector.VersionInfo) (connector.VersionInfo, boo
 	slices.SortFunc(semvers, func(a, b *v) int { return util.CompareSemver(*b.sv, *a.sv) })
 	return *semvers[0].vi, true, nil
 }
+
+// SumSHA256 calculates SHA-256 for the provided byte slice and returns
+// the raw 32-byte digest as a fixed-size array.
+//
+// The function does not modify the input data.
+// The returned value is the binary digest, not a hex string.
+// Use digest[:] if a []byte is needed.
+func SumSHA256(data []byte) [32]byte {
+	return sha256.Sum256(data)
+}
+
+// EqualSHA256 returns true when both SHA-256 digests are identical.
+//
+// Since SHA-256 digest is represented as a fixed-size array [32]byte,
+// Go allows direct value comparison with ==.
+// This is the simplest and fastest approach for ordinary equality checks.
+func EqualSHA256(a, b [32]byte) bool {
+	return a == b
+}