add crypto sha1, sha256, sha512

_cmptest/sha1demo/sha1.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"crypto/sha1"
+	"fmt"
+)
+
+func main() {
+	data := []byte("This page intentionally left blank.")
+	fmt.Printf("% x", sha1.Sum(data))
+}

_cmptest/sha256demo/sha256.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"crypto/sha256"
+	"fmt"
+)
+
+func main() {
+	sum := sha256.Sum256([]byte("hello world\n"))
+	fmt.Printf("%x", sum)
+}

_cmptest/sha512demo/sha512.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"crypto/sha512"
+	"fmt"
+)
+
+func main() {
+	sum := sha512.Sum512([]byte("hello world\n"))
+	fmt.Printf("%x", sum)
+}