1 files changed, 27 insertions, 0 deletions
diff --git a/cmd/sigsum/format/format.go b/cmd/sigsum/format/format.go
new file mode 100644
index 0000000..eff7b3e
--- /dev/null
+++ b/cmd/sigsum/format/format.go
@@ -0,0 +1,27 @@
+package format
+
+import (
+	"fmt"
+
+	"git.sigsum.org/sigsum-go/pkg/types"
+	"git.sigsum.org/sigsum-tools-go/internal/util"
+	"git.sigsum.org/sigsum-tools-go/pkg/policy"
+)
+
+func Main(args []string, policy policy.Policy) error {
+	if len(args) != 1 {
+		return fmt.Errorf("format: must have one input file")
+	}
+
+	preimage, err := util.FileHash(args[0])
+	if err != nil {
+		return fmt.Errorf("format: preparing checksum: %v", err)
+	}
+	stm := types.Statement{
+		ShardHint: policy.ShardHint(),
+		Checksum:  *types.HashFn(preimage[:]),
+	}
+
+	fmt.Printf("%s", stm.ToBinary())
+	return nil
+}