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134 lines
3.9 KiB
134 lines
3.9 KiB
package keys
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import (
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"fmt"
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"sort"
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crypto "github.com/tendermint/go-crypto"
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wire "github.com/tendermint/go-wire"
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data "github.com/tendermint/go-wire/data"
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)
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// Storage has many implementation, based on security and sharing requirements
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// like disk-backed, mem-backed, vault, db, etc.
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type Storage interface {
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Put(name string, key []byte, info Info) error
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Get(name string) (key []byte, info Info, err error)
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List() (Infos, error)
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Delete(name string) error
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}
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// Info is the public information about a key
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type Info struct {
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Name string `json:"name"`
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Address data.Bytes `json:"address"`
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PubKey crypto.PubKey `json:"pubkey"`
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}
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func (i *Info) Format() Info {
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if !i.PubKey.Empty() {
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i.Address = i.PubKey.Address()
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}
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return *i
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}
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// Infos is a wrapper to allows alphabetical sorting of the keys
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type Infos []Info
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func (k Infos) Len() int { return len(k) }
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func (k Infos) Less(i, j int) bool { return k[i].Name < k[j].Name }
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func (k Infos) Swap(i, j int) { k[i], k[j] = k[j], k[i] }
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func (k Infos) Sort() {
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if k != nil {
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sort.Sort(k)
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}
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}
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// Signable represents any transaction we wish to send to tendermint core
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// These methods allow us to sign arbitrary Tx with the KeyStore
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type Signable interface {
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// SignBytes is the immutable data, which needs to be signed
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SignBytes() []byte
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// Sign will add a signature and pubkey.
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//
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// Depending on the Signable, one may be able to call this multiple times for multisig
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// Returns error if called with invalid data or too many times
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Sign(pubkey crypto.PubKey, sig crypto.Signature) error
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// Signers will return the public key(s) that signed if the signature
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// is valid, or an error if there is any issue with the signature,
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// including if there are no signatures
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Signers() ([]crypto.PubKey, error)
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// TxBytes returns the transaction data as well as all signatures
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// It should return an error if Sign was never called
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TxBytes() ([]byte, error)
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}
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// Signer allows one to use a keystore to sign transactions
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type Signer interface {
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Sign(name, passphrase string, tx Signable) error
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}
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// Manager allows simple CRUD on a keystore, as an aid to signing
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type Manager interface {
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Signer
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// Create also returns a seed phrase for cold-storage
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Create(name, passphrase, algo string) (Info, string, error)
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// Recover takes a seedphrase and loads in the private key
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Recover(name, passphrase, seedphrase string) (Info, error)
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List() (Infos, error)
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Get(name string) (Info, error)
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Update(name, oldpass, newpass string) error
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Delete(name, passphrase string) error
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}
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/**** MockSignable allows us to view data ***/
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// MockSignable lets us wrap arbitrary data with a go-crypto signature
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type MockSignable struct {
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Data []byte
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PubKey crypto.PubKey
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Signature crypto.Signature
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}
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var _ Signable = &MockSignable{}
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// NewMockSignable sets the data to sign
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func NewMockSignable(data []byte) *MockSignable {
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return &MockSignable{Data: data}
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}
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// TxBytes returns the full data with signatures
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func (s *MockSignable) TxBytes() ([]byte, error) {
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return wire.BinaryBytes(s), nil
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}
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// SignBytes returns the original data passed into `NewSig`
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func (s *MockSignable) SignBytes() []byte {
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return s.Data
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}
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// Sign will add a signature and pubkey.
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//
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// Depending on the Signable, one may be able to call this multiple times for multisig
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// Returns error if called with invalid data or too many times
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func (s *MockSignable) Sign(pubkey crypto.PubKey, sig crypto.Signature) error {
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s.PubKey = pubkey
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s.Signature = sig
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return nil
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}
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// Signers will return the public key(s) that signed if the signature
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// is valid, or an error if there is any issue with the signature,
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// including if there are no signatures
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func (s *MockSignable) Signers() ([]crypto.PubKey, error) {
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if s.PubKey.Empty() {
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return nil, fmt.Errorf("no signers")
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}
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if !s.PubKey.VerifyBytes(s.SignBytes(), s.Signature) {
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return nil, fmt.Errorf("invalid signature")
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}
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return []crypto.PubKey{s.PubKey}, nil
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}
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