1 files changed, 25 insertions, 0 deletions
diff --git a/core/crypt.go b/core/crypt.go
new file mode 100644
index 0000000..6de70e6
--- /dev/null
+++ b/core/crypt.go
@@ -0,0 +1,25 @@
+package core
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+func calculateStringHash(a string) (string, error) {
+	hash := sha256.New()
+	hash.Write([]byte(a))
+	hashInBytes := hash.Sum(nil)[:20]
+	return strings.TrimSpace(fmt.Sprintf("%x", hashInBytes)), nil
+}
+
+func calculateFileHash(file *os.File) (string, error) {
+	hash := sha256.New()
+	if _, err := io.Copy(hash, file); err != nil {
+		return "", err
+	}
+	hashInBytes := hash.Sum(nil)[:20]
+	return strings.TrimSpace(fmt.Sprintf("%x", hashInBytes)), nil
+}