Add an api to get a pubkey and privkey from a privkey byte string.
ok and some tweaks from @jrick.
This commit is contained in:
Owain G. Ainsworth
parent
de670bd5b2
commit
d0a4086e29
4 changed files with 55 additions and 30 deletions
28
privkey.go
Normal file
28
privkey.go
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@ -0,0 +1,28 @@
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// Copyright (c) 2013-2014 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package btcec
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import (
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"crypto/ecdsa"
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"math/big"
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)
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// PrivKeyFromBytes returns a private and public key for `curve' based on the
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// private key passed as an argument as a byte slice.
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func PrivKeyFromBytes(curve *KoblitzCurve, pk []byte) (*ecdsa.PrivateKey,
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*PublicKey) {
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x, y := curve.ScalarBaseMult(pk)
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priv := &ecdsa.PrivateKey{
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PublicKey: ecdsa.PublicKey{
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Curve: curve,
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X: x,
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Y: y,
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},
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D: new(big.Int).SetBytes(pk),
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}
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return priv, (*PublicKey)(&priv.PublicKey)
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}
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@ -6,7 +6,6 @@ package btcec_test
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import (
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"bytes"
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"crypto/ecdsa"
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"github.com/conformal/btcec"
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"github.com/davecgh/go-spew/spew"
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"testing"
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@ -220,13 +219,10 @@ var pubKeyTests = []pubKeyTest{
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func TestPrivKeys(t *testing.T) {
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for _, test := range privKeyTests {
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x, y := btcec.S256().ScalarBaseMult(test.key)
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pub := (*btcec.PublicKey)(&ecdsa.PublicKey{
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Curve: btcec.S256(),
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X: x,
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Y: y,
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})
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_, err := btcec.ParsePubKey(pub.SerializeUncompressed(), btcec.S256())
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_, pub := btcec.PrivKeyFromBytes(btcec.S256(), test.key)
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_, err := btcec.ParsePubKey(
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pub.SerializeUncompressed(), btcec.S256())
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if err != nil {
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t.Errorf("%s privkey: %v", test.name, err)
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continue
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@ -437,7 +437,7 @@ func testSignCompact(t *testing.T, tag string, curve *btcec.KoblitzCurve,
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pk, wasCompressed, err := btcec.RecoverCompact(curve, sig, hashed)
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if err != nil {
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t.Errorf("%s: error recovering: %s", tag, err)
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t.Errorf("%s: error recovering: %s", tag, err)
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return
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}
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if pk.X.Cmp(priv.X) != 0 || pk.Y.Cmp(priv.Y) != 0 {
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@ -10,55 +10,56 @@ github.com/conformal/btcec/field.go fieldVal.PutBytes 100.00% (32/32)
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github.com/conformal/btcec/btcec.go KoblitzCurve.addZ1EqualsZ2 100.00% (30/30)
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github.com/conformal/btcec/btcec.go KoblitzCurve.addZ1AndZ2EqualsOne 100.00% (29/29)
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github.com/conformal/btcec/btcec.go KoblitzCurve.addJacobian 100.00% (22/22)
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github.com/conformal/btcec/btcec.go KoblitzCurve.doubleGeneric 100.00% (18/18)
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github.com/conformal/btcec/btcec.go KoblitzCurve.doubleZ1EqualsOne 100.00% (18/18)
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github.com/conformal/btcec/btcec.go KoblitzCurve.doubleGeneric 100.00% (18/18)
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github.com/conformal/btcec/signature.go Signature.Serialize 100.00% (13/13)
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github.com/conformal/btcec/btcec.go KoblitzCurve.fieldJacobianToBigAffine 100.00% (12/12)
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github.com/conformal/btcec/field.go fieldVal.MulInt 100.00% (12/12)
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github.com/conformal/btcec/field.go fieldVal.Add 100.00% (11/11)
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github.com/conformal/btcec/btcec.go KoblitzCurve.fieldJacobianToBigAffine 100.00% (12/12)
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github.com/conformal/btcec/field.go fieldVal.Add2 100.00% (11/11)
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github.com/conformal/btcec/field.go fieldVal.SetBytes 100.00% (11/11)
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github.com/conformal/btcec/field.go fieldVal.Add 100.00% (11/11)
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github.com/conformal/btcec/field.go fieldVal.NegateVal 100.00% (11/11)
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github.com/conformal/btcec/field.go fieldVal.Zero 100.00% (10/10)
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github.com/conformal/btcec/btcec.go KoblitzCurve.Add 100.00% (10/10)
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github.com/conformal/btcec/field.go fieldVal.SetBytes 100.00% (11/11)
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github.com/conformal/btcec/btcec.go KoblitzCurve.ScalarMult 100.00% (10/10)
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github.com/conformal/btcec/btcec.go KoblitzCurve.Add 100.00% (10/10)
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github.com/conformal/btcec/field.go fieldVal.Zero 100.00% (10/10)
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github.com/conformal/btcec/btcec.go KoblitzCurve.doubleJacobian 100.00% (9/9)
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github.com/conformal/btcec/btcec.go initS256 100.00% (9/9)
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github.com/conformal/btcec/pubkey.go PublicKey.SerializeHybrid 100.00% (8/8)
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github.com/conformal/btcec/signature.go canonicalizeInt 100.00% (8/8)
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github.com/conformal/btcec/pubkey.go PublicKey.SerializeCompressed 100.00% (7/7)
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github.com/conformal/btcec/btcec.go KoblitzCurve.Double 100.00% (7/7)
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github.com/conformal/btcec/pubkey.go PublicKey.SerializeUncompressed 100.00% (5/5)
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github.com/conformal/btcec/field.go fieldVal.SetByteSlice 100.00% (5/5)
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github.com/conformal/btcec/pubkey.go PublicKey.SerializeCompressed 100.00% (7/7)
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github.com/conformal/btcec/privkey.go PrivKeyFromBytes 100.00% (6/6)
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github.com/conformal/btcec/pubkey.go pad 100.00% (5/5)
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github.com/conformal/btcec/field.go fieldVal.SetByteSlice 100.00% (5/5)
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github.com/conformal/btcec/pubkey.go PublicKey.SerializeUncompressed 100.00% (5/5)
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github.com/conformal/btcec/signature.go canonicalPadding 100.00% (4/4)
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github.com/conformal/btcec/btcec.go KoblitzCurve.bigAffineToField 100.00% (4/4)
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github.com/conformal/btcec/field.go fieldVal.SetHex 100.00% (4/4)
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github.com/conformal/btcec/signature.go canonicalPadding 100.00% (4/4)
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github.com/conformal/btcec/btcec.go KoblitzCurve.IsOnCurve 100.00% (4/4)
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github.com/conformal/btcec/field.go fieldVal.SetInt 100.00% (3/3)
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github.com/conformal/btcec/field.go fieldVal.Bytes 100.00% (3/3)
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github.com/conformal/btcec/field.go fieldVal.IsZero 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.AddInt 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.Equals 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.Set 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.String 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.Equals 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.IsZero 100.00% (2/2)
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github.com/conformal/btcec/btcec.go S256 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.AddInt 100.00% (2/2)
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github.com/conformal/btcec/field.go fieldVal.Set 100.00% (2/2)
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github.com/conformal/btcec/pubkey.go isOdd 100.00% (1/1)
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github.com/conformal/btcec/field.go fieldVal.Negate 100.00% (1/1)
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github.com/conformal/btcec/btcec.go initAll 100.00% (1/1)
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github.com/conformal/btcec/signature.go ParseSignature 100.00% (1/1)
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github.com/conformal/btcec/signature.go ParseDERSignature 100.00% (1/1)
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github.com/conformal/btcec/btcec.go KoblitzCurve.ScalarBaseMult 100.00% (1/1)
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github.com/conformal/btcec/field.go fieldVal.Mul 100.00% (1/1)
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github.com/conformal/btcec/btcec.go KoblitzCurve.Params 100.00% (1/1)
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github.com/conformal/btcec/field.go fieldVal.Square 100.00% (1/1)
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github.com/conformal/btcec/field.go fieldVal.Negate 100.00% (1/1)
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github.com/conformal/btcec/field.go fieldVal.IsOdd 100.00% (1/1)
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github.com/conformal/btcec/btcec.go initAll 100.00% (1/1)
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github.com/conformal/btcec/btcec.go KoblitzCurve.ScalarBaseMult 100.00% (1/1)
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github.com/conformal/btcec/btcec.go KoblitzCurve.QPlus1Div4 100.00% (1/1)
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github.com/conformal/btcec/signature.go ParseSignature 100.00% (1/1)
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github.com/conformal/btcec/pubkey.go ParsePubKey 96.15% (25/26)
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github.com/conformal/btcec/signature.go SignCompact 90.91% (20/22)
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github.com/conformal/btcec/pubkey.go ParsePubKey 92.86% (26/28)
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github.com/conformal/btcec/pubkey.go decompressPoint 88.89% (8/9)
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github.com/conformal/btcec/signature.go recoverKeyFromSignature 86.96% (20/23)
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github.com/conformal/btcec/signature.go SignCompact 86.36% (19/22)
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github.com/conformal/btcec/signature.go RecoverCompact 77.78% (7/9)
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github.com/conformal/btcec/signature.go hashToInt 77.78% (7/9)
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github.com/conformal/btcec ------------------------------------- 98.80% (903/914)
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github.com/conformal/btcec ------------------------------------- 98.59% (909/922)
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