crypto

package

v0.1.0 Latest Latest Go to latest Published: Apr 15, 2024 License: MIT Imports: 10 Imported by: 6

Details

Valid go.mod file
Redistributable license
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Stable version
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Repository

github.com/elnosh/gonuts

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Documentation ¶

Overview ¶

Package crypto implements the cryptography used in the Cashu protocol as explained in Cashu.

Index ¶

Constants
func BlindMessage(secret string, r *secp256k1.PrivateKey) (*secp256k1.PublicKey, *secp256k1.PrivateKey, error)
func BlindMessageDeprecated(secret string, r *secp256k1.PrivateKey) (*secp256k1.PublicKey, *secp256k1.PrivateKey)
func DeriveKeysetId(keyset map[uint64]KeyPair) string
func HashToCurve(message []byte) (*secp256k1.PublicKey, error)
func HashToCurveDeprecated(message []byte) *secp256k1.PublicKey
func SignBlindedMessage(B_ *secp256k1.PublicKey, k *secp256k1.PrivateKey) *secp256k1.PublicKey
func UnblindSignature(C_ *secp256k1.PublicKey, r *secp256k1.PrivateKey, K *secp256k1.PublicKey) *secp256k1.PublicKey
func Verify(secret string, k *secp256k1.PrivateKey, C *secp256k1.PublicKey) bool
type KeyPair
- func (kp *KeyPair) MarshalJSON() ([]byte, error)
- func (kp *KeyPair) UnmarshalJSON(data []byte) error
type KeyPairTemp
type Keyset
- func GenerateKeyset(seed, derivationPath string) *Keyset
type KeysetTemp
type KeysetsMap

Constants ¶

View Source

const DomainSeparator = "Secp256k1_HashToCurve_Cashu_"

Variables ¶

This section is empty.

Functions ¶

func BlindMessageDeprecated ¶

func BlindMessageDeprecated(secret string, r *secp256k1.PrivateKey) (*secp256k1.PublicKey, *secp256k1.PrivateKey)

func DeriveKeysetId ¶

func DeriveKeysetId(keyset map[uint64]KeyPair) string

DeriveKeysetId returns the string ID derived from the map keyset The steps to derive the ID are: - sort public keys by their amount in ascending order - concatenate all public keys to one byte array - HASH_SHA256 the concatenated public keys - take the first 14 characters of the hex-encoded hash - prefix it with a keyset ID version byte

func HashToCurve ¶

func HashToCurve(message []byte) (*secp256k1.PublicKey, error)

The domain separator is b"Secp256k1_HashToCurve_Cashu_" or bytes.fromhex("536563703235366b315f48617368546f43757276655f43617368755f").

func HashToCurveDeprecated ¶

func HashToCurveDeprecated(message []byte) *secp256k1.PublicKey

func SignBlindedMessage ¶

func SignBlindedMessage(B_ *secp256k1.PublicKey, k *secp256k1.PrivateKey) *secp256k1.PublicKey

C_ = kB_

func UnblindSignature ¶

func UnblindSignature(C_ *secp256k1.PublicKey, r *secp256k1.PrivateKey,
	K *secp256k1.PublicKey) *secp256k1.PublicKey

C = C_ - rK

func Verify ¶

func Verify(secret string, k *secp256k1.PrivateKey, C *secp256k1.PublicKey) bool

k * HashToCurve(secret) == C

Types ¶

type KeyPair ¶

type KeyPair struct {
	PrivateKey *secp256k1.PrivateKey
	PublicKey  *secp256k1.PublicKey
}

func (*KeyPair) MarshalJSON ¶

func (kp *KeyPair) MarshalJSON() ([]byte, error)

func (*KeyPair) UnmarshalJSON ¶

func (kp *KeyPair) UnmarshalJSON(data []byte) error

type KeyPairTemp ¶

type KeyPairTemp struct {
	PrivateKey []byte `json:"private_key"`
	PublicKey  []byte `json:"public_key"`
}

type Keyset ¶

type Keyset struct {
	Id      string
	MintURL string
	Unit    string
	Active  bool
	Keys    map[uint64]KeyPair
}

func GenerateKeyset ¶

func GenerateKeyset(seed, derivationPath string) *Keyset

func (*Keyset) DerivePublic ¶

func (ks *Keyset) DerivePublic() map[uint64]string

DerivePublic returns the keyset's public keys as a map of amounts uint64 to strings that represents the public key

func (*Keyset) MarshalJSON ¶

func (ks *Keyset) MarshalJSON() ([]byte, error)

func (*Keyset) UnmarshalJSON ¶

func (ks *Keyset) UnmarshalJSON(data []byte) error

type KeysetTemp ¶

type KeysetTemp struct {
	Id      string
	MintURL string
	Unit    string
	Active  bool
	Keys    map[uint64]json.RawMessage
}

type KeysetsMap ¶

type KeysetsMap map[string]map[string]Keyset

KeysetsMap maps a mint url to map of string keyset id to keyset

Source Files ¶

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