Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
- API
  
  Reference documentation for the pkg.go.dev API
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

crypto

package module

Go to main page

Versions in this module

v0

v0.27.2

Aug 12, 2026

v0.27.1

Aug 12, 2026

v0.27.0

Aug 11, 2026

v0.26.0

Jun 23, 2026

v0.25.4

Jan 21, 2026

v0.25.3

Mar 28, 2025

Changes in this version

+ func E2PolynomialImages(out []pointE2, A []pointE2)

v0.25.2

Aug 14, 2024

v0.25.1

Apr 3, 2024

v0.25.0

Dec 8, 2023

Changes in this version

+ const PrKeyLenBLSBLS12381

+ const PubKeyLenBLSBLS12381

+ type JointFeldmanState struct

+ func (s *JointFeldmanState) End() (PrivateKey, PublicKey, []PublicKey, error)

+ func (s *JointFeldmanState) ForceDisqualify(participant int) error

+ func (s *JointFeldmanState) HandleBroadcastMsg(orig int, msg []byte) error

+ func (s *JointFeldmanState) HandlePrivateMsg(orig int, msg []byte) error

+ func (s *JointFeldmanState) NextTimeout() error

+ func (s *JointFeldmanState) Running() bool

+ func (s *JointFeldmanState) Start(seed []byte) error

+ func (s JointFeldmanState) Size() int

+ func (s JointFeldmanState) Threshold() int

v0.24.9

Jul 4, 2023

Changes in this version

+ const DKGMaxSize

+ const DKGMinSize

+ const KeyGenSeedMaxLen

+ const KeyGenSeedMinLen

+ const MinimumThreshold

+ const PrKeyLenECDSAP256

+ const PrKeyLenECDSASecp256k1

+ const PubKeyLenECDSAP256

+ const PubKeyLenECDSASecp256k1

+ const SeedMaxLenDKG

+ const SeedMinLenDKG

+ const SignatureLenBLSBLS12381

+ const SignatureLenECDSAP256

+ const SignatureLenECDSASecp256k1

+ const ThresholdSignMaxSize

+ const ThresholdSignMinSize

+ var BLS12381Order = []byte

+ func BLSThresholdKeyGen(size int, threshold int, seed []byte) ([]PrivateKey, []PublicKey, PublicKey, error)

+ func BLSVerifyPOP(pk PublicKey, s Signature) (bool, error)

+ func BatchVerifyBLSSignaturesOneMessage(pks []PublicKey, sigs []Signature, message []byte, kmac hash.Hasher) ([]bool, error)

+ func EnoughShares(threshold int, sharesNumber int) (bool, error)

+ func IsBLSAggregateEmptyListError(err error) bool

+ func IsBLSSignatureIdentity(s Signature) bool

+ func IsDKGFailureError(err error) bool

+ func IsDKGInvalidStateTransitionError(err error) bool

+ func IsDuplicatedSignerError(err error) bool

+ func IsInvalidHasherSizeError(err error) bool

+ func IsInvalidInputsError(err error) bool

+ func IsInvalidSignatureError(err error) bool

+ func IsNilHasherError(err error) bool

+ func IsNotBLSKeyError(err error) bool

+ func IsNotEnoughSharesError(err error) bool

+ func NewExpandMsgXOFKMAC128(tag string) hash.Hasher

+ func SPOCKVerify(pk1 PublicKey, proof1 Signature, pk2 PublicKey, proof2 Signature) (bool, error)

+ func SPOCKVerifyAgainstData(pk PublicKey, proof Signature, data []byte, kmac hash.Hasher) (bool, error)

+ func SignatureFormatCheck(algo SigningAlgorithm, s Signature) (bool, error)

+ func TestHasherErrors(t *testing.T)

+ func TestKeyGenErrors(t *testing.T)

+ func VerifyBLSSignatureManyMessages(pks []PublicKey, s Signature, messages [][]byte, kmac []hash.Hasher) (bool, error)

+ func VerifyBLSSignatureOneMessage(pks []PublicKey, s Signature, message []byte, kmac hash.Hasher) (bool, error)

+ type DKGProcessor interface

+ Broadcast func(data []byte)

+ Disqualify func(participant int, log string)

+ FlagMisbehavior func(participant int, log string)

+ PrivateSend func(dest int, data []byte)

+ type DKGState interface

+ End func() (PrivateKey, PublicKey, []PublicKey, error)

+ ForceDisqualify func(participant int) error

+ HandleBroadcastMsg func(orig int, msg []byte) error

+ HandlePrivateMsg func(orig int, msg []byte) error

+ NextTimeout func() error

+ Running func() bool

+ Size func() int

+ Start func(seed []byte) error

+ Threshold func() int

+ func NewFeldmanVSS(size int, threshold int, myIndex int, processor DKGProcessor, dealerIndex int) (DKGState, error)

+ func NewFeldmanVSSQual(size int, threshold int, myIndex int, processor DKGProcessor, dealerIndex int) (DKGState, error)

+ func NewJointFeldman(size int, threshold int, myIndex int, processor DKGProcessor) (DKGState, error)

+ type PrivateKey interface

+ Algorithm func() SigningAlgorithm

+ Encode func() []byte

+ Equals func(PrivateKey) bool

+ PublicKey func() PublicKey

+ Sign func([]byte, hash.Hasher) (Signature, error)

+ Size func() int

+ String func() string

+ func AggregateBLSPrivateKeys(keys []PrivateKey) (PrivateKey, error)

+ func DecodePrivateKey(algo SigningAlgorithm, data []byte) (PrivateKey, error)

+ func GeneratePrivateKey(algo SigningAlgorithm, seed []byte) (PrivateKey, error)

+ type PublicKey interface

+ Algorithm func() SigningAlgorithm

+ Encode func() []byte

+ EncodeCompressed func() []byte

+ Equals func(PublicKey) bool

+ Size func() int

+ String func() string

+ Verify func(Signature, []byte, hash.Hasher) (bool, error)

+ func AggregateBLSPublicKeys(keys []PublicKey) (PublicKey, error)

+ func DecodePublicKey(algo SigningAlgorithm, data []byte) (PublicKey, error)

+ func DecodePublicKeyCompressed(algo SigningAlgorithm, data []byte) (PublicKey, error)

+ func IdentityBLSPublicKey() PublicKey

+ func RemoveBLSPublicKeys(aggKey PublicKey, keysToRemove []PublicKey) (PublicKey, error)

+ type Signature []byte

+ func AggregateBLSSignatures(sigs []Signature) (Signature, error)

+ func BLSGeneratePOP(sk PrivateKey) (Signature, error)

+ func BLSInvalidSignature() Signature

+ func BLSReconstructThresholdSignature(size int, threshold int, shares []Signature, signers []int) (Signature, error)

+ func SPOCKProve(sk PrivateKey, data []byte, kmac hash.Hasher) (Signature, error)

+ func (s Signature) Bytes() []byte

+ func (s Signature) String() string

+ type SigningAlgorithm int

+ const BLSBLS12381

+ const ECDSAP256

+ const ECDSASecp256k1

+ const UnknownSigningAlgorithm

+ func (f SigningAlgorithm) String() string

+ type ThresholdSignatureInspector interface

+ EnoughShares func() bool

+ HasShare func(orig int) (bool, error)

+ ThresholdSignature func() (Signature, error)

+ TrustedAdd func(orig int, share Signature) (bool, error)

+ VerifyAndAdd func(orig int, share Signature) (bool, bool, error)

+ VerifyShare func(orig int, share Signature) (bool, error)

+ VerifyThresholdSignature func(thresholdSignature Signature) (bool, error)

+ func NewBLSThresholdSignatureInspector(groupPublicKey PublicKey, sharePublicKeys []PublicKey, threshold int, ...) (ThresholdSignatureInspector, error)

+ type ThresholdSignatureParticipant interface

+ SignShare func() (Signature, error)

+ func NewBLSThresholdSignatureParticipant(groupPublicKey PublicKey, sharePublicKeys []PublicKey, threshold int, ...) (ThresholdSignatureParticipant, error)