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package hashenc
import (
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"hash"
"sync"
)
// Hash defines a pooled hash.Hash implementation
type Hash interface {
// Hash ensures we implement the base hash.Hash implementation
hash.Hash
// Release resets the Hash and places it back in the pool
Release()
}
// poolHash is our Hash implementation, providing a hash.Hash and a pool to return to
type poolHash struct {
hash.Hash
pool *sync.Pool
}
func (h *poolHash) Release() {
h.Reset()
h.pool.Put(h)
}
// SHA512Pool defines a pool of SHA512 hashes
type SHA512Pool interface {
// SHA512 returns a Hash implementing the SHA512 hashing algorithm
SHA512() Hash
}
// NewSHA512Pool returns a new SHA512Pool implementation
func NewSHA512Pool() SHA512Pool {
p := &sha512Pool{}
p.New = func() interface{} {
return &poolHash{
Hash: sha512.New(),
pool: &p.Pool,
}
}
return p
}
// sha512Pool is our SHA512Pool implementation, simply wrapping sync.Pool
type sha512Pool struct {
sync.Pool
}
func (p *sha512Pool) SHA512() Hash {
return p.Get().(Hash)
}
// SHA256Pool defines a pool of SHA256 hashes
type SHA256Pool interface {
// SHA256 returns a Hash implementing the SHA256 hashing algorithm
SHA256() Hash
}
// NewSHA256Pool returns a new SHA256Pool implementation
func NewSHA256Pool() SHA256Pool {
p := &sha256Pool{}
p.New = func() interface{} {
return &poolHash{
Hash: sha256.New(),
pool: &p.Pool,
}
}
return p
}
// sha256Pool is our SHA256Pool implementation, simply wrapping sync.Pool
type sha256Pool struct {
sync.Pool
}
func (p *sha256Pool) SHA256() Hash {
return p.Get().(Hash)
}
// SHA1Pool defines a pool of SHA1 hashes
type SHA1Pool interface {
SHA1() Hash
}
// NewSHA1Pool returns a new SHA1Pool implementation
func NewSHA1Pool() SHA1Pool {
p := &sha1Pool{}
p.New = func() interface{} {
return &poolHash{
Hash: sha1.New(),
pool: &p.Pool,
}
}
return p
}
// sha1Pool is our SHA1Pool implementation, simply wrapping sync.Pool
type sha1Pool struct {
sync.Pool
}
func (p *sha1Pool) SHA1() Hash {
return p.Get().(Hash)
}
// MD5Pool defines a pool of MD5 hashes
type MD5Pool interface {
MD5() Hash
}
// NewMD5Pool returns a new MD5 implementation
func NewMD5Pool() MD5Pool {
p := &md5Pool{}
p.New = func() interface{} {
return &poolHash{
Hash: md5.New(),
pool: &p.Pool,
}
}
return p
}
// md5Pool is our MD5Pool implementation, simply wrapping sync.Pool
type md5Pool struct {
sync.Pool
}
func (p *md5Pool) MD5() Hash {
return p.Get().(Hash)
}
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