add openssl sha1,sha256,sha512

_demo/cshademo/sha.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"fmt"
+	"unsafe"
+
+	"github.com/goplus/llgo/c/openssl"
+)
+
+func main() {
+
+	var sha1 openssl.SHA_CTX
+	sha1.Init()
+	sha1.UpdateString("His money is twice tainted:")
+	sha1.UpdateString(" 'taint yours and 'taint mine.")
+
+	h := make([]byte, openssl.SHA_DIGEST_LENGTH)
+	sha1.Final(unsafe.SliceData(h))
+	fmt.Printf("%x\n", h)
+
+	var sha256 openssl.SHA256_CTX
+	sha256.Init()
+	sha256.UpdateString("His money is twice tainted:")
+	sha256.UpdateString(" 'taint yours and 'taint mine.")
+
+	hh := make([]byte, openssl.SHA256_DIGEST_LENGTH)
+	sha256.Final(unsafe.SliceData(hh))
+	fmt.Printf("%x\n", hh)
+}