From 16933a72994910afe738ce83928dc89361f59ce7 Mon Sep 17 00:00:00 2001
From: Zhi Guan <guanzhi1980@gmail.com>
Date: Wed, 19 Dec 2018 22:41:13 +0800
Subject: [PATCH] Delete mac.go

---
 go/gmssl/mac.go | 75 -------------------------------------------------
 1 file changed, 75 deletions(-)
 delete mode 100644 go/gmssl/mac.go

diff --git a/go/gmssl/mac.go b/go/gmssl/mac.go
deleted file mode 100644
index 1629db2b..00000000
--- a/go/gmssl/mac.go
+++ /dev/null
@@ -1,75 +0,0 @@
-/* +build cgo */
-
-package gmssl
-
-/*
-#include <openssl/hmac.h>
-#include <openssl/cmac.h>
-*/
-import "C"
-
-import (
-	"unsafe"
-	"runtime"
-)
-
-func GetMacLength(name string) (int, error) {
-	cname := C.CString(name)
-	defer C.free(unsafe.Pointer(cname))
-	md := C.EVP_get_digestbyname(cname)
-	if md == nil {
-		return 0, GetErrors()
-	}
-	return int(C.EVP_MD_size(md)), nil
-}
-
-type HMACContext struct {
-	hctx *C.HMAC_CTX
-}
-
-func NewHMACContext(name string, eng *Engine, key []byte) (
-	*HMACContext, error) {
-	cname := C.CString(name)
-	defer C.free(unsafe.Pointer(cname))
-	md := C.EVP_get_digestbyname(cname)
-	if md == nil {
-		return nil, GetErrors()
-	}
-
-	ctx := C.HMAC_CTX_new()
-	if ctx == nil {
-		return nil, GetErrors()
-	}
-
-	ret := &HMACContext{ctx}
-	runtime.SetFinalizer(ret, func(ret *HMACContext) {
-		C.HMAC_CTX_free(ret.hctx)
-	})
-
-	if 1 != C.HMAC_Init_ex(ctx,
-		unsafe.Pointer(&key[0]), C.int(len(key)), md, nil) {
-		return nil, GetErrors()
-	}
-	return ret, nil
-}
-
-func (ctx *HMACContext) Update(data []byte) error {
-	if len(data) == 0 {
-		return nil
-	}
-	if 1 != C.HMAC_Update(ctx.hctx,
-		(*C.uchar)(unsafe.Pointer(&data[0])), C.size_t(len(data))) {
-		return GetErrors()
-	}
-	return nil
-}
-
-func (ctx *HMACContext) Final() ([]byte, error) {
-	outbuf := make([]byte, 64)
-	outlen := C.uint(len(outbuf))
-	if 1 != C.HMAC_Final(ctx.hctx,
-		(*C.uchar)(unsafe.Pointer(&outbuf[0])), &outlen) {
-		return nil, GetErrors()
-	}
-	return outbuf[:outlen], nil
-}