secp256k1-0.4.4: Bindings for secp256k1 library from Bitcoin Core

LicenseMIT
MaintainerJean-Pierre Rupp <root@haskoin.com>
Stabilityexperimental
PortabilityPOSIX
Safe HaskellNone
LanguageHaskell2010

Crypto.Secp256k1

Contents

Description

Crytpographic functions from Bitcoin’s secp256k1 library.

Synopsis

Messages

data Msg Source

Instances

msg :: ByteString -> Maybe Msg Source

Import 32-byte ByteString as Msg.

getMsg :: Msg -> ByteString Source

Get 32-byte message.

Secret Keys

data SecKey Source

Instances

secKey :: ByteString -> Maybe SecKey Source

Import 32-byte ByteString as SecKey.

getSecKey :: SecKey -> ByteString Source

Get 32-byte secret key.

derivePubKey :: SecKey -> PubKey Source

Public Keys

data PubKey Source

Instances

importPubKey :: ByteString -> Maybe PubKey Source

Import DER-encoded public key.

exportPubKey :: Bool -> PubKey -> ByteString Source

Encode public key as DER. First argument True for compressed output.

Signatures

data Sig Source

Instances

signMsg :: SecKey -> Msg -> Sig Source

verifySig :: PubKey -> Sig -> Msg -> Bool Source

Verify message signature. True means that the signature is correct.

normalizeSig :: Sig -> (Sig, Bool) Source

Convert signature to a normalized lower-S form. Boolean value True indicates that the signature changed, False indicates that it was already normal.

DER

importSig :: ByteString -> Maybe Sig Source

Import DER-encoded signature.

laxImportSig :: ByteString -> Maybe Sig Source

Relaxed DER parsing. Allows certain DER errors and violations.

exportSig :: Sig -> ByteString Source

Encode signature as strict DER.

Compact

data CompactSig Source

Constructors

CompactSig 

Fields

getCompactSigR :: Word256
 
getCompactSigS :: Word256
 

Instances

exportCompactSig :: Sig -> CompactSig Source

importCompactSig :: CompactSig -> Maybe Sig Source

Addition & Multiplication

data Tweak Source

Instances

tweak :: ByteString -> Maybe Tweak Source

32-Byte ByteString as Tweak.

getTweak :: Tweak -> ByteString Source

Get 32-byte tweak.

tweakAddSecKey :: SecKey -> Tweak -> Maybe SecKey Source

Add tweak to secret key.

tweakMulSecKey :: SecKey -> Tweak -> Maybe SecKey Source

Multiply secret key by tweak.

tweakAddPubKey :: PubKey -> Tweak -> Maybe PubKey Source

Add tweak to public key. Tweak is multiplied first by G to obtain a point.

tweakMulPubKey :: PubKey -> Tweak -> Maybe PubKey Source

Multiply public key by tweak. Tweak is multiplied first by G to obtain a point.

combinePubKeys :: [PubKey] -> Maybe PubKey Source

Add multiple public keys together.