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crypto.go
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crypto.go
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package crypto
import (
"bytes"
"crypto/sha256"
"encoding/json"
"errors"
"fmt"
"github.com/dashpay/dashd-go/btcjson"
"github.com/dashpay/tenderdash/internal/jsontypes"
tmbytes "github.com/dashpay/tenderdash/libs/bytes"
)
const (
// HashSize is the size in bytes of an AddressHash.
HashSize = sha256.Size
// AddressSize is the size of a pubkey address.
AddressSize = 20
DefaultHashSize = 32
DefaultAppHashSize = DefaultHashSize
ProTxHashSize = DefaultHashSize
QuorumHashSize = DefaultHashSize
)
type KeyType int
var (
// ErrInvalidProTxHash uses in proTxHash validation
ErrInvalidProTxHash = errors.New("proTxHash is invalid")
)
const (
Ed25519 KeyType = iota
BLS12381
Secp256k1
KeyTypeAny
)
// Address is an address is a []byte, but hex-encoded even in JSON.
// []byte leaves us the option to change the address length.
// Use an alias so Unmarshal methods (with ptr receivers) are available too.
type Address = tmbytes.HexBytes
type ProTxHash = tmbytes.HexBytes
type QuorumHash = tmbytes.HexBytes
// AddressHash computes a truncated SHA-256 hash of bz for use as
// a peer address.
//
// See: https://docs.tendermint.com/master/spec/core/data_structures.html#address
func AddressHash(bz []byte) Address {
h := sha256.Sum256(bz)
return Address(h[:AddressSize])
}
// Checksum returns the SHA256 of the bz.
func Checksum(bz []byte) []byte {
h := sha256.Sum256(bz)
return h[:]
}
func ProTxHashFromSeedBytes(bz []byte) ProTxHash {
return Checksum(bz)
}
func RandProTxHash() ProTxHash {
return CRandBytes(ProTxHashSize)
}
// RandProTxHashes generates and returns a list of N random generated proTxHashes
func RandProTxHashes(n int) []ProTxHash {
proTxHashes := make([]ProTxHash, n)
for i := 0; i < n; i++ {
proTxHashes[i] = RandProTxHash()
}
return proTxHashes
}
// ProTxHashValidate validates the proTxHash value
func ProTxHashValidate(val ProTxHash) error {
if len(val) != ProTxHashSize {
return fmt.Errorf(
"incorrect size actual %d, expected %d: %w",
len(val),
ProTxHashSize,
ErrInvalidProTxHash,
)
}
return nil
}
func RandQuorumHash() QuorumHash {
return CRandBytes(ProTxHashSize)
}
func SmallQuorumType() btcjson.LLMQType {
return btcjson.LLMQType_5_60
}
type SortProTxHash []ProTxHash
func (sptxh SortProTxHash) Len() int {
return len(sptxh)
}
func (sptxh SortProTxHash) Less(i, j int) bool {
return bytes.Compare(sptxh[i], sptxh[j]) == -1
}
func (sptxh SortProTxHash) Swap(i, j int) {
sptxh[i], sptxh[j] = sptxh[j], sptxh[i]
}
type QuorumKeys struct {
PrivKey PrivKey
PubKey PubKey
ThresholdPublicKey PubKey
}
type quorumKeysJSON struct {
PrivKey json.RawMessage `json:"priv_key"`
PubKey json.RawMessage `json:"pub_key"`
ThresholdPublicKey json.RawMessage `json:"threshold_public_key"`
}
func (pvKey QuorumKeys) MarshalJSON() ([]byte, error) {
var keys quorumKeysJSON
var err error
keys.PrivKey, err = jsontypes.Marshal(pvKey.PrivKey)
if err != nil {
return nil, err
}
keys.PubKey, err = jsontypes.Marshal(pvKey.PubKey)
if err != nil {
return nil, err
}
keys.ThresholdPublicKey, err = jsontypes.Marshal(pvKey.ThresholdPublicKey)
if err != nil {
return nil, err
}
return json.Marshal(keys)
}
func (pvKey *QuorumKeys) UnmarshalJSON(data []byte) error {
var keys quorumKeysJSON
err := json.Unmarshal(data, &keys)
if err != nil {
return err
}
err = jsontypes.Unmarshal(keys.PrivKey, &pvKey.PrivKey)
if err != nil {
return err
}
err = jsontypes.Unmarshal(keys.PubKey, &pvKey.PubKey)
if err != nil {
return err
}
return jsontypes.Unmarshal(keys.ThresholdPublicKey, &pvKey.ThresholdPublicKey)
}
// Validator is a validator interface
type Validator interface {
Validate() error
}
type PubKey interface {
Address() Address
Bytes() []byte
VerifySignature(msg []byte, sig []byte) bool
VerifySignatureDigest(hash []byte, sig []byte) bool
Equals(PubKey) bool
Type() string
// Implementations must support tagged encoding in JSON.
jsontypes.Tagged
fmt.Stringer
HexStringer
}
type PrivKey interface {
Bytes() []byte
Sign(msg []byte) ([]byte, error)
SignDigest(msg []byte) ([]byte, error)
PubKey() PubKey
Equals(PrivKey) bool
Type() string
// Implementations must support tagged encoding in JSON.
jsontypes.Tagged
}
type Symmetric interface {
Keygen() []byte
Encrypt(plaintext []byte, secret []byte) (ciphertext []byte)
Decrypt(ciphertext []byte, secret []byte) (plaintext []byte, err error)
}
// HexStringer ...
type HexStringer interface {
HexString() string
}
// BatchVerifier If a new key type implements batch verification,
// the key type must be registered in github.com/dashpay/tenderdash/crypto/batch
type BatchVerifier interface {
// Add appends an entry into the BatchVerifier.
Add(key PubKey, message, signature []byte) error
// Verify verifies all the entries in the BatchVerifier, and returns
// if every signature in the batch is valid, and a vector of bools
// indicating the verification status of each signature (in the order
// that signatures were added to the batch).
Verify() (bool, []bool)
}