eckcdsa

package
v1.0.5011 Latest Latest
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 Go to latest Published: Dec 30, 2024 License: Apache-2.0 Imports: 13 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	ErrParametersNotSetUp = errors.New("go-cryptobin/eckcdsa: parameters not set up before generating key")
	ErrInvalidK           = errors.New("go-cryptobin/eckcdsa: use another K")
	ErrInvalidASN1        = errors.New("go-cryptobin/eckcdsa: invalid ASN.1")
	ErrInvalidSignerOpts  = errors.New("go-cryptobin/eckcdsa: opts must be *SignerOpts")
)

Functions

func AddNamedCurve 

func AddNamedCurve(curve elliptic.Curve, oid asn1.ObjectIdentifier)

func BitsToBytes 

func BitsToBytes(bits int) int

func MarshalECPrivateKey 

func MarshalECPrivateKey(key *PrivateKey) ([]byte, error)

MarshalECPrivateKey converts an EC private key to SEC 1, ASN.1 DER form.

This kind of key is commonly encoded in PEM blocks of type "EC PRIVATE KEY". For a more flexible key format which is not EC specific, use MarshalPKCS8PrivateKey.

func MarshalPrivateKey 

func MarshalPrivateKey(key *PrivateKey) ([]byte, error)

Marshal PrivateKey to der

func MarshalPublicKey 

func MarshalPublicKey(pub *PublicKey) ([]byte, error)

Marshal PublicKey to der

func NamedCurveFromOid 

func NamedCurveFromOid(oid asn1.ObjectIdentifier) elliptic.Curve

func OidFromNamedCurve 

func OidFromNamedCurve(curve elliptic.Curve) (asn1.ObjectIdentifier, bool)

func PrivateKeyTo 

func PrivateKeyTo(key *PrivateKey) []byte

输出私钥明文 output PrivateKey data

func PublicKeyTo 

func PublicKeyTo(key *PublicKey) []byte

输出公钥明文 output PublicKey data

func Sign 

func Sign(rand io.Reader, priv *PrivateKey, h Hasher, data []byte) (sig []byte, err error)

Sign data returns the ASN.1 encoded signature.

func SignBytes 

func SignBytes(rand io.Reader, priv *PrivateKey, h Hasher, data []byte) (sig []byte, err error)

Sign data returns the Bytes encoded signature.

func SignToRS 

func SignToRS(random io.Reader, priv *PrivateKey, h Hasher, msg []byte) (r, s *big.Int, err error)

* 

*| IUF - EC-KCDSA signature
*|
*| IUF  1. Compute h = H(z||m)
*|   F  2. If |H| > bitlen(q), set h to beta' rightmost bits of
*|         bitstring h (w/ beta' = 8 * ceil(bitlen(q) / 8)), i.e.
*|         set h to I2BS(beta', BS2I(|H|, h) mod 2^beta')
*|   F  3. Get a random value k in ]0,q[
*|   F  4. Compute W = (W_x,W_y) = kG
*|   F  5. Compute r = H(FE2OS(W_x)).
*|   F  6. If |H| > bitlen(q), set r to beta' rightmost bits of
*|         bitstring r (w/ beta' = 8 * ceil(bitlen(q) / 8)), i.e.
*|         set r to I2BS(beta', BS2I(|H|, r) mod 2^beta')
*|   F  7. Compute e = OS2I(r XOR h) mod q
*|   F  8. Compute s = x(k - e) mod q
*|   F  9. if s == 0, restart at step 3.
*|   F 10. return (r,s)
*

func SignUsingK 

func SignUsingK(k *big.Int, priv *PrivateKey, hashFunc Hasher, msg []byte) (r, s *big.Int, err error)

sign with k

func Verify 

func Verify(pub *PublicKey, h Hasher, data, sig []byte) bool

Verify verifies the ASN.1 encoded signature, sig, M, of hash using the public key, pub. Its return value records whether the signature is valid.

func VerifyBytes 

func VerifyBytes(pub *PublicKey, h Hasher, data, sig []byte) bool

Verify verifies the Bytes encoded signature

func VerifyWithRS 

func VerifyWithRS(pub *PublicKey, hashFunc Hasher, data []byte, r, s *big.Int) bool

* 

*| IUF - EC-KCDSA verification
*|
*| I   1. Check the length of r:
*|         - if |H| > bitlen(q), r must be of length
*|           beta' = 8 * ceil(bitlen(q) / 8)
*|         - if |H| <= bitlen(q), r must be of length hsize
*| I   2. Check that s is in ]0,q[
*| IUF 3. Compute h = H(z||m)
*|   F 4. If |H| > bitlen(q), set h to beta' rightmost bits of
*|        bitstring h (w/ beta' = 8 * ceil(bitlen(q) / 8)), i.e.
*|        set h to I2BS(beta', BS2I(|H|, h) mod 2^beta')
*|   F 5. Compute e = OS2I(r XOR h) mod q
*|   F 6. Compute W' = sY + eG, where Y is the public key
*|   F 7. Compute r' = h(W'x)
*|   F 8. If |H| > bitlen(q), set r' to beta' rightmost bits of
*|        bitstring r' (w/ beta' = 8 * ceil(bitlen(q) / 8)), i.e.
*|        set r' to I2BS(beta', BS2I(|H|, r') mod 2^beta')
*|   F 9. Check if r == r'
*

func XY 

func XY(D *big.Int, c elliptic.Curve) (X, Y *big.Int)

Types

type Hasher 

type Hasher = func() hash.Hash

hash Func

type PrivateKey 

type PrivateKey struct {
	PublicKey

	D *big.Int
}

ec-kcdsa PrivateKey

func GenerateKey 

func GenerateKey(random io.Reader, c elliptic.Curve) (*PrivateKey, error)

Generate the paramters

func NewPrivateKey 

func NewPrivateKey(curve elliptic.Curve, k []byte) (*PrivateKey, error)

New a PrivateKey from privatekey data

func ParseECPrivateKey 

func ParseECPrivateKey(der []byte) (*PrivateKey, error)

ParseECPrivateKey parses an EC private key in SEC 1, ASN.1 DER form.

This kind of key is commonly encoded in PEM blocks of type "EC PRIVATE KEY".

func ParsePrivateKey 

func ParsePrivateKey(derBytes []byte) (*PrivateKey, error)

Parse PrivateKey der

func (*PrivateKey) Equal 

func (priv *PrivateKey) Equal(x crypto.PrivateKey) bool

Equal reports whether pub and x have the same value.

func (*PrivateKey) Public 

func (priv *PrivateKey) Public() crypto.PublicKey

Public returns the public key corresponding to priv.

func (*PrivateKey) Sign 

func (priv *PrivateKey) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error)

crypto.Signer

type PublicKey 

type PublicKey struct {
	elliptic.Curve

	X, Y *big.Int
}

ec-kcdsa PublicKey

func NewPublicKey 

func NewPublicKey(curve elliptic.Curve, k []byte) (*PublicKey, error)

根据公钥明文初始化公钥 New a PublicKey from publicKey data

func ParsePublicKey 

func ParsePublicKey(derBytes []byte) (pub *PublicKey, err error)

Parse PublicKey der

func (*PublicKey) Equal 

func (pub *PublicKey) Equal(x crypto.PublicKey) bool

Equal reports whether pub and x have the same value.

func (*PublicKey) Verify 

func (pub *PublicKey) Verify(msg, sign []byte, opts crypto.SignerOpts) (bool, error)

Verify asn.1 marshal data

type SignerOpts 

type SignerOpts struct {
	Hash Hasher
}

SignerOpts contains options for creating and verifying EC-KCDSA signatures.

func (*SignerOpts) GetHash 

func (opts *SignerOpts) GetHash() Hasher

GetHash returns func() hash.Hash

func (*SignerOpts) HashFunc 

func (opts *SignerOpts) HashFunc() crypto.Hash

HashFunc returns opts.Hash

Source Files

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