package crypto

import "github.com/docker/distribution/Godeps/_workspace/src/github.com/jlhawn/go-crypto"

Package crypto is a Subset of the Go `crypto` Package with a Resumable Hash

Index ¶

• func RegisterHash(h Hash, f func() ResumableHash)
• type Hash
• func (h Hash) Available() bool
• func (h Hash) HashFunc() Hash
• func (h Hash) New() ResumableHash
• func (h Hash) Size() int
• type ResumableHash

Functions ¶

func RegisterHash ¶

func RegisterHash(h Hash, f func() ResumableHash)

RegisterHash registers a function that returns a new instance of the given hash function. This is intended to be called from the init function in packages that implement hash functions.

Types ¶

type Hash ¶

type Hash uint

Hash identifies a cryptographic hash function that is implemented in another package.

const (
	SHA224 Hash = 1 + iota // import crypto/sha256
	SHA256                 // import crypto/sha256
	SHA384                 // import crypto/sha512
	SHA512                 // import crypto/sha512

)

func (Hash) Available ¶

func (h Hash) Available() bool

Available reports whether the given hash function is linked into the binary.

func (Hash) HashFunc ¶

func (h Hash) HashFunc() Hash

HashFunc simply returns the value of h so that Hash implements SignerOpts.

func (Hash) New ¶

func (h Hash) New() ResumableHash

New returns a new ResumableHash calculating the given hash function. New panics if the hash function is not linked into the binary.

func (Hash) Size ¶

func (h Hash) Size() int

Size returns the length, in bytes, of a digest resulting from the given hash function. It doesn't require that the hash function in question be linked into the program.

type ResumableHash ¶

type ResumableHash interface {
	// ResumableHash is a superset of hash.Hash
	hash.Hash
	// Len returns the number of bytes written to the Hash so far.
	Len() uint64
	// State returns a snapshot of the state of the Hash.
	State() ([]byte, error)
	// Restore resets the Hash to the given state.
	Restore(state []byte) error
}

ResumableHash is the common interface implemented by all resumable hash functions.

Source Files ¶

crypto.go

Directories ¶