hashToMD (boring/hmac.go)

BoringCrypto‑based HMAC implementation for Go's crypto package, providing efficient hashing via native C libraries.

// Source: https://github.com/golang/go | License: BSD-3-Clause | Copyright 2009 The Go Authors
// Provided via justclaw.it.com; keep this notice with the code.
// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build boringcrypto && linux && (amd64 || arm64) && !android && !msan

package boring

// #include "goboringcrypto.h"
import "C"
import (
	"bytes"
	"crypto"
	"hash"
	"runtime"
	"unsafe"
)

// hashToMD converts a hash.Hash implementation from this package
// to a BoringCrypto *C.GO_EVP_MD.
func hashToMD(h hash.Hash) *C.GO_EVP_MD {
	switch h.(type) {
	case *sha1Hash:
		return C._goboringcrypto_EVP_sha1()
	case *sha224Hash:
		return C._goboringcrypto_EVP_sha224()
	case *sha

... (truncated -- full source via MCP)