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package md5simd
import (
"crypto/md5"
"hash"
"sync"
)
const (
// The blocksize of MD5 in bytes.
BlockSize = 64
// The size of an MD5 checksum in bytes.
Size = 16
// internalBlockSize is the internal block size.
internalBlockSize = 32 << 10
)
type Server interface {
NewHash() Hasher
Close()
}
type Hasher interface {
hash.Hash
Close()
}
// StdlibHasher returns a Hasher that uses the stdlib for hashing.
// Used hashers are stored in a pool for fast reuse.
func StdlibHasher() Hasher {
return &md5Wrapper{Hash: md5Pool.New().(hash.Hash)}
}
// md5Wrapper is a wrapper around the builtin hasher.
type md5Wrapper struct {
hash.Hash
}
var md5Pool = sync.Pool{New: func() interface{} {
return md5.New()
}}
// fallbackServer - Fallback when no assembly is available.
type fallbackServer struct {
}
// NewHash -- return regular Golang md5 hashing from crypto
func (s *fallbackServer) NewHash() Hasher {
return &md5Wrapper{Hash: md5Pool.New().(hash.Hash)}
}
func (s *fallbackServer) Close() {
}
func (m *md5Wrapper) Close() {
if m.Hash != nil {
m.Reset()
md5Pool.Put(m.Hash)
m.Hash = nil
}
}
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