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crypto: fix megacheck warnings (#14917)

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* crypto: fix megacheck warnings

* crypto/ecies: remove ASN.1 support
pull/14707/merge
Egon Elbre 7 years ago committed by Péter Szilágyi
parent 9a7e99f75d
commit 10ce8b0e3c
6 changed files with 19 additions and 870 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 584
      crypto/ecies/asn1.go
  2. 10
      crypto/ecies/ecies.go
  3. 186
      crypto/ecies/ecies_test.go
  4. 93
      crypto/ecies/params.go
  5. 5
      crypto/sha3/sha3.go
  6. 11
      crypto/sha3/sha3_test.go

584
crypto/ecies/asn1.go
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@ -1,584 +0,0 @@
// Copyright (c) 2013 Kyle Isom <kyle@tyrfingr.is>
// Copyright (c) 2012 The Go Authors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package ecies
import (
"bytes"
"crypto"
"crypto/elliptic"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/asn1"
"encoding/pem"
"fmt"
"hash"
"math/big"
ethcrypto "github.com/ethereum/go-ethereum/crypto"
)
var (
secgScheme = []int{1, 3, 132, 1}
shaScheme = []int{2, 16, 840, 1, 101, 3, 4, 2}
ansiX962Scheme = []int{1, 2, 840, 10045}
x963Scheme = []int{1, 2, 840, 63, 0}
)
var ErrInvalidPrivateKey = fmt.Errorf("ecies: invalid private key")
func doScheme(base, v []int) asn1.ObjectIdentifier {
var oidInts asn1.ObjectIdentifier
oidInts = append(oidInts, base...)
return append(oidInts, v...)
}
// curve OID code taken from crypto/x509, including
// - oidNameCurve*
// - namedCurveFromOID
// - oidFromNamedCurve
// RFC 5480, 2.1.1.1. Named Curve
//
// secp224r1 OBJECT IDENTIFIER ::= {
// iso(1) identified-organization(3) certicom(132) curve(0) 33 }
//
// secp256r1 OBJECT IDENTIFIER ::= {
// iso(1) member-body(2) us(840) ansi-X9-62(10045) curves(3)
// prime(1) 7 }
//
// secp384r1 OBJECT IDENTIFIER ::= {
// iso(1) identified-organization(3) certicom(132) curve(0) 34 }
//
// secp521r1 OBJECT IDENTIFIER ::= {
// iso(1) identified-organization(3) certicom(132) curve(0) 35 }
//
// NB: secp256r1 is equivalent to prime256v1
type secgNamedCurve asn1.ObjectIdentifier
var (
secgNamedCurveS256 = secgNamedCurve{1, 3, 132, 0, 10}
secgNamedCurveP256 = secgNamedCurve{1, 2, 840, 10045, 3, 1, 7}
secgNamedCurveP384 = secgNamedCurve{1, 3, 132, 0, 34}
secgNamedCurveP521 = secgNamedCurve{1, 3, 132, 0, 35}
rawCurveP256 = []byte{6, 8, 4, 2, 1, 3, 4, 7, 2, 2, 0, 6, 6, 1, 3, 1, 7}
rawCurveP384 = []byte{6, 5, 4, 3, 1, 2, 9, 4, 0, 3, 4}
rawCurveP521 = []byte{6, 5, 4, 3, 1, 2, 9, 4, 0, 3, 5}
)
func rawCurve(curve elliptic.Curve) []byte {
switch curve {
case elliptic.P256():
return rawCurveP256
case elliptic.P384():
return rawCurveP384
case elliptic.P521():
return rawCurveP521
default:
return nil
}
}
func (curve secgNamedCurve) Equal(curve2 secgNamedCurve) bool {
if len(curve) != len(curve2) {
return false
}
for i := range curve {
if curve[i] != curve2[i] {
return false
}
}
return true
}
func namedCurveFromOID(curve secgNamedCurve) elliptic.Curve {
switch {
case curve.Equal(secgNamedCurveS256):
return ethcrypto.S256()
case curve.Equal(secgNamedCurveP256):
return elliptic.P256()
case curve.Equal(secgNamedCurveP384):
return elliptic.P384()
case curve.Equal(secgNamedCurveP521):
return elliptic.P521()
}
return nil
}
func oidFromNamedCurve(curve elliptic.Curve) (secgNamedCurve, bool) {
switch curve {
case elliptic.P256():
return secgNamedCurveP256, true
case elliptic.P384():
return secgNamedCurveP384, true
case elliptic.P521():
return secgNamedCurveP521, true
case ethcrypto.S256():
return secgNamedCurveS256, true
}
return nil, false
}
// asnAlgorithmIdentifier represents the ASN.1 structure of the same name. See RFC
// 5280, section 4.1.1.2.
type asnAlgorithmIdentifier struct {
Algorithm asn1.ObjectIdentifier
Parameters asn1.RawValue `asn1:"optional"`
}
func (a asnAlgorithmIdentifier) Cmp(b asnAlgorithmIdentifier) bool {
if len(a.Algorithm) != len(b.Algorithm) {
return false
}
for i := range a.Algorithm {
if a.Algorithm[i] != b.Algorithm[i] {
return false
}
}
return true
}
type asnHashFunction asnAlgorithmIdentifier
var (
oidSHA1 = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 26}
oidSHA224 = doScheme(shaScheme, []int{4})
oidSHA256 = doScheme(shaScheme, []int{1})
oidSHA384 = doScheme(shaScheme, []int{2})
oidSHA512 = doScheme(shaScheme, []int{3})
)
func hashFromOID(oid asn1.ObjectIdentifier) func() hash.Hash {
switch {
case oid.Equal(oidSHA1):
return sha1.New
case oid.Equal(oidSHA224):
return sha256.New224
case oid.Equal(oidSHA256):
return sha256.New
case oid.Equal(oidSHA384):
return sha512.New384
case oid.Equal(oidSHA512):
return sha512.New
}
return nil
}
func oidFromHash(hash crypto.Hash) (asn1.ObjectIdentifier, bool) {
switch hash {
case crypto.SHA1:
return oidSHA1, true
case crypto.SHA224:
return oidSHA224, true
case crypto.SHA256:
return oidSHA256, true
case crypto.SHA384:
return oidSHA384, true
case crypto.SHA512:
return oidSHA512, true
default:
return nil, false
}
}
var (
asnAlgoSHA1 = asnHashFunction{
Algorithm: oidSHA1,
}
asnAlgoSHA224 = asnHashFunction{
Algorithm: oidSHA224,
}
asnAlgoSHA256 = asnHashFunction{
Algorithm: oidSHA256,
}
asnAlgoSHA384 = asnHashFunction{
Algorithm: oidSHA384,
}
asnAlgoSHA512 = asnHashFunction{
Algorithm: oidSHA512,
}
)
// type ASNasnSubjectPublicKeyInfo struct {
//
// }
//
type asnSubjectPublicKeyInfo struct {
Algorithm asn1.ObjectIdentifier
PublicKey asn1.BitString
Supplements ecpksSupplements `asn1:"optional"`
}
type asnECPKAlgorithms struct {
Type asn1.ObjectIdentifier
}
var idPublicKeyType = doScheme(ansiX962Scheme, []int{2})
var idEcPublicKey = doScheme(idPublicKeyType, []int{1})
var idEcPublicKeySupplemented = doScheme(idPublicKeyType, []int{0})
func curveToRaw(curve elliptic.Curve) (rv asn1.RawValue, ok bool) {
switch curve {
case elliptic.P256(), elliptic.P384(), elliptic.P521():
raw := rawCurve(curve)
return asn1.RawValue{
Tag: 30,
Bytes: raw[2:],
FullBytes: raw,
}, true
default:
return rv, false
}
}
func asnECPublicKeyType(curve elliptic.Curve) (algo asnAlgorithmIdentifier, ok bool) {
raw, ok := curveToRaw(curve)
if !ok {
return
} else {
return asnAlgorithmIdentifier{Algorithm: idEcPublicKey,
Parameters: raw}, true
}
}
type asnECPrivKeyVer int
var asnECPrivKeyVer1 asnECPrivKeyVer = 1
type asnPrivateKey struct {
Version asnECPrivKeyVer
Private []byte
Curve secgNamedCurve `asn1:"optional"`
Public asn1.BitString
}
var asnECDH = doScheme(secgScheme, []int{12})
type asnECDHAlgorithm asnAlgorithmIdentifier
var (
dhSinglePass_stdDH_sha1kdf = asnECDHAlgorithm{
Algorithm: doScheme(x963Scheme, []int{2}),
}
dhSinglePass_stdDH_sha256kdf = asnECDHAlgorithm{
Algorithm: doScheme(secgScheme, []int{11, 1}),
}
dhSinglePass_stdDH_sha384kdf = asnECDHAlgorithm{
Algorithm: doScheme(secgScheme, []int{11, 2}),
}
dhSinglePass_stdDH_sha224kdf = asnECDHAlgorithm{
Algorithm: doScheme(secgScheme, []int{11, 0}),
}
dhSinglePass_stdDH_sha512kdf = asnECDHAlgorithm{
Algorithm: doScheme(secgScheme, []int{11, 3}),
}
)
func (a asnECDHAlgorithm) Cmp(b asnECDHAlgorithm) bool {
if len(a.Algorithm) != len(b.Algorithm) {
return false
}
for i := range a.Algorithm {
if a.Algorithm[i] != b.Algorithm[i] {
return false
}
}
return true
}
// asnNISTConcatenation is the only supported KDF at this time.
type asnKeyDerivationFunction asnAlgorithmIdentifier
var asnNISTConcatenationKDF = asnKeyDerivationFunction{
Algorithm: doScheme(secgScheme, []int{17, 1}),
}
func (a asnKeyDerivationFunction) Cmp(b asnKeyDerivationFunction) bool {
if len(a.Algorithm) != len(b.Algorithm) {
return false
}
for i := range a.Algorithm {
if a.Algorithm[i] != b.Algorithm[i] {
return false
}
}
return true
}
var eciesRecommendedParameters = doScheme(secgScheme, []int{7})
var eciesSpecifiedParameters = doScheme(secgScheme, []int{8})
type asnECIESParameters struct {
KDF asnKeyDerivationFunction `asn1:"optional"`
Sym asnSymmetricEncryption `asn1:"optional"`
MAC asnMessageAuthenticationCode `asn1:"optional"`
}
type asnSymmetricEncryption asnAlgorithmIdentifier
var (
aes128CTRinECIES = asnSymmetricEncryption{
Algorithm: doScheme(secgScheme, []int{21, 0}),
}
aes192CTRinECIES = asnSymmetricEncryption{
Algorithm: doScheme(secgScheme, []int{21, 1}),
}
aes256CTRinECIES = asnSymmetricEncryption{
Algorithm: doScheme(secgScheme, []int{21, 2}),
}
)
func (a asnSymmetricEncryption) Cmp(b asnSymmetricEncryption) bool {
if len(a.Algorithm) != len(b.Algorithm) {
return false
}
for i := range a.Algorithm {
if a.Algorithm[i] != b.Algorithm[i] {
return false
}
}
return true
}
type asnMessageAuthenticationCode asnAlgorithmIdentifier
var (
hmacFull = asnMessageAuthenticationCode{
Algorithm: doScheme(secgScheme, []int{22}),
}
)
func (a asnMessageAuthenticationCode) Cmp(b asnMessageAuthenticationCode) bool {
if len(a.Algorithm) != len(b.Algorithm) {
return false
}
for i := range a.Algorithm {
if a.Algorithm[i] != b.Algorithm[i] {
return false
}
}
return true
}
type ecpksSupplements struct {
ECDomain secgNamedCurve
ECCAlgorithms eccAlgorithmSet
}
type eccAlgorithmSet struct {
ECDH asnECDHAlgorithm `asn1:"optional"`
ECIES asnECIESParameters `asn1:"optional"`
}
func marshalSubjectPublicKeyInfo(pub *PublicKey) (subj asnSubjectPublicKeyInfo, err error) {
subj.Algorithm = idEcPublicKeySupplemented
curve, ok := oidFromNamedCurve(pub.Curve)
if !ok {
err = ErrInvalidPublicKey
return
}
subj.Supplements.ECDomain = curve
if pub.Params != nil {
subj.Supplements.ECCAlgorithms.ECDH = paramsToASNECDH(pub.Params)
subj.Supplements.ECCAlgorithms.ECIES = paramsToASNECIES(pub.Params)
}
pubkey := elliptic.Marshal(pub.Curve, pub.X, pub.Y)
subj.PublicKey = asn1.BitString{
BitLength: len(pubkey) * 8,
Bytes: pubkey,
}
return
}
// Encode a public key to DER format.
func MarshalPublic(pub *PublicKey) ([]byte, error) {
subj, err := marshalSubjectPublicKeyInfo(pub)
if err != nil {
return nil, err
}
return asn1.Marshal(subj)
}
// Decode a DER-encoded public key.
func UnmarshalPublic(in []byte) (pub *PublicKey, err error) {
var subj asnSubjectPublicKeyInfo
if _, err = asn1.Unmarshal(in, &subj); err != nil {
return
}
if !subj.Algorithm.Equal(idEcPublicKeySupplemented) {
err = ErrInvalidPublicKey
return
}
pub = new(PublicKey)
pub.Curve = namedCurveFromOID(subj.Supplements.ECDomain)
x, y := elliptic.Unmarshal(pub.Curve, subj.PublicKey.Bytes)
if x == nil {
err = ErrInvalidPublicKey
return
}
pub.X = x
pub.Y = y
pub.Params = new(ECIESParams)
asnECIEStoParams(subj.Supplements.ECCAlgorithms.ECIES, pub.Params)
asnECDHtoParams(subj.Supplements.ECCAlgorithms.ECDH, pub.Params)
if pub.Params == nil {
if pub.Params = ParamsFromCurve(pub.Curve); pub.Params == nil {
err = ErrInvalidPublicKey
}
}
return
}
func marshalPrivateKey(prv *PrivateKey) (ecprv asnPrivateKey, err error) {
ecprv.Version = asnECPrivKeyVer1
ecprv.Private = prv.D.Bytes()
var ok bool
ecprv.Curve, ok = oidFromNamedCurve(prv.PublicKey.Curve)
if !ok {
err = ErrInvalidPrivateKey
return
}
var pub []byte
if pub, err = MarshalPublic(&prv.PublicKey); err != nil {
return
} else {
ecprv.Public = asn1.BitString{
BitLength: len(pub) * 8,
Bytes: pub,
}
}
return
}
// Encode a private key to DER format.
func MarshalPrivate(prv *PrivateKey) ([]byte, error) {
ecprv, err := marshalPrivateKey(prv)
if err != nil {
return nil, err
}
return asn1.Marshal(ecprv)
}
// Decode a private key from a DER-encoded format.
func UnmarshalPrivate(in []byte) (prv *PrivateKey, err error) {
var ecprv asnPrivateKey
if _, err = asn1.Unmarshal(in, &ecprv); err != nil {
return
} else if ecprv.Version != asnECPrivKeyVer1 {
err = ErrInvalidPrivateKey
return
}
privateCurve := namedCurveFromOID(ecprv.Curve)
if privateCurve == nil {
err = ErrInvalidPrivateKey
return
}
prv = new(PrivateKey)
prv.D = new(big.Int).SetBytes(ecprv.Private)
if pub, err := UnmarshalPublic(ecprv.Public.Bytes); err != nil {
return nil, err
} else {
prv.PublicKey = *pub
}
return
}
// Export a public key to PEM format.
func ExportPublicPEM(pub *PublicKey) (out []byte, err error) {
der, err := MarshalPublic(pub)
if err != nil {
return
}
var block pem.Block
block.Type = "ELLIPTIC CURVE PUBLIC KEY"
block.Bytes = der
buf := new(bytes.Buffer)
err = pem.Encode(buf, &block)
if err != nil {
return
} else {
out = buf.Bytes()
}
return
}
// Export a private key to PEM format.
func ExportPrivatePEM(prv *PrivateKey) (out []byte, err error) {
der, err := MarshalPrivate(prv)
if err != nil {
return
}
var block pem.Block
block.Type = "ELLIPTIC CURVE PRIVATE KEY"
block.Bytes = der
buf := new(bytes.Buffer)
err = pem.Encode(buf, &block)
if err != nil {
return
} else {
out = buf.Bytes()
}
return
}
// Import a PEM-encoded public key.
func ImportPublicPEM(in []byte) (pub *PublicKey, err error) {
p, _ := pem.Decode(in)
if p == nil || p.Type != "ELLIPTIC CURVE PUBLIC KEY" {
return nil, ErrInvalidPublicKey
}
pub, err = UnmarshalPublic(p.Bytes)
return
}
// Import a PEM-encoded private key.
func ImportPrivatePEM(in []byte) (prv *PrivateKey, err error) {
p, _ := pem.Decode(in)
if p == nil || p.Type != "ELLIPTIC CURVE PRIVATE KEY" {
return nil, ErrInvalidPrivateKey
}
prv, err = UnmarshalPrivate(p.Bytes)
return
}

10
crypto/ecies/ecies.go
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@ -151,14 +151,16 @@ var (
func incCounter(ctr []byte) { func incCounter(ctr []byte) {
if ctr[3]++; ctr[3] != 0 { if ctr[3]++; ctr[3] != 0 {
return return
} else if ctr[2]++; ctr[2] != 0 { }
if ctr[2]++; ctr[2] != 0 {
return return
} else if ctr[1]++; ctr[1] != 0 { }
if ctr[1]++; ctr[1] != 0 {
return return
} else if ctr[0]++; ctr[0] != 0 { }
if ctr[0]++; ctr[0] != 0 {
return return
} }
return
} }
// NIST SP 800-56 Concatenation Key Derivation Function (see section 5.8.1). // NIST SP 800-56 Concatenation Key Derivation Function (see section 5.8.1).

186
crypto/ecies/ecies_test.go
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@ -37,7 +37,6 @@ import (
"encoding/hex" "encoding/hex"
"flag" "flag"
"fmt" "fmt"
"io/ioutil"
"math/big" "math/big"
"testing" "testing"
@ -63,8 +62,7 @@ func TestKDF(t *testing.T) {
t.FailNow() t.FailNow()
} }
if len(k) != 64 { if len(k) != 64 {
fmt.Printf("KDF: generated key is the wrong size (%d instead of 64\n", fmt.Printf("KDF: generated key is the wrong size (%d instead of 64\n", len(k))
len(k))
t.FailNow() t.FailNow()
} }
} }
@ -74,14 +72,9 @@ var ErrBadSharedKeys = fmt.Errorf("ecies: shared keys don't match")
// cmpParams compares a set of ECIES parameters. We assume, as per the // cmpParams compares a set of ECIES parameters. We assume, as per the
// docs, that AES is the only supported symmetric encryption algorithm. // docs, that AES is the only supported symmetric encryption algorithm.
func cmpParams(p1, p2 *ECIESParams) bool { func cmpParams(p1, p2 *ECIESParams) bool {
if p1.hashAlgo != p2.hashAlgo { return p1.hashAlgo == p2.hashAlgo &&
return false p1.KeyLen == p2.KeyLen &&
} else if p1.KeyLen != p2.KeyLen { p1.BlockSize == p2.BlockSize
return false
} else if p1.BlockSize != p2.BlockSize {
return false
}
return true
} }
// cmpPublic returns true if the two public keys represent the same pojnt. // cmpPublic returns true if the two public keys represent the same pojnt.
@ -212,118 +205,6 @@ func TestTooBigSharedKey(t *testing.T) {
} }
} }
// Ensure a public key can be successfully marshalled and unmarshalled, and
// that the decoded key is the same as the original.
func TestMarshalPublic(t *testing.T) {
prv, err := GenerateKey(rand.Reader, DefaultCurve, nil)
if err != nil {
t.Fatalf("GenerateKey error: %s", err)
}
out, err := MarshalPublic(&prv.PublicKey)
if err != nil {
t.Fatalf("MarshalPublic error: %s", err)
}
pub, err := UnmarshalPublic(out)
if err != nil {
t.Fatalf("UnmarshalPublic error: %s", err)
}
if !cmpPublic(prv.PublicKey, *pub) {
t.Fatal("ecies: failed to unmarshal public key")
}
}
// Ensure that a private key can be encoded into DER format, and that
// the resulting key is properly parsed back into a public key.
func TestMarshalPrivate(t *testing.T) {
prv, err := GenerateKey(rand.Reader, DefaultCurve, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
out, err := MarshalPrivate(prv)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
if dumpEnc {
ioutil.WriteFile("test.out", out, 0644)
}
prv2, err := UnmarshalPrivate(out)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
if !cmpPrivate(prv, prv2) {
fmt.Println("ecdh: private key import failed")
t.FailNow()
}
}
// Ensure that a private key can be successfully encoded to PEM format, and
// the resulting key is properly parsed back in.
func TestPrivatePEM(t *testing.T) {
prv, err := GenerateKey(rand.Reader, DefaultCurve, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
out, err := ExportPrivatePEM(prv)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
if dumpEnc {
ioutil.WriteFile("test.key", out, 0644)
}
prv2, err := ImportPrivatePEM(out)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
} else if !cmpPrivate(prv, prv2) {
fmt.Println("ecdh: import from PEM failed")
t.FailNow()
}
}
// Ensure that a public key can be successfully encoded to PEM format, and
// the resulting key is properly parsed back in.
func TestPublicPEM(t *testing.T) {
prv, err := GenerateKey(rand.Reader, DefaultCurve, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
out, err := ExportPublicPEM(&prv.PublicKey)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
if dumpEnc {
ioutil.WriteFile("test.pem", out, 0644)
}
pub2, err := ImportPublicPEM(out)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
} else if !cmpPublic(prv.PublicKey, *pub2) {
fmt.Println("ecdh: import from PEM failed")
t.FailNow()
}
}
// Benchmark the generation of P256 keys. // Benchmark the generation of P256 keys.
func BenchmarkGenerateKeyP256(b *testing.B) { func BenchmarkGenerateKeyP256(b *testing.B) {
for i := 0; i < b.N; i++ { for i := 0; i < b.N; i++ {
@ -437,74 +318,27 @@ func TestDecryptShared2(t *testing.T) {
} }
} }
// TestMarshalEncryption validates the encode/decode produces a valid
// ECIES encryption key.
func TestMarshalEncryption(t *testing.T) {
prv1, err := GenerateKey(rand.Reader, DefaultCurve, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
out, err := MarshalPrivate(prv1)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
prv2, err := UnmarshalPrivate(out)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
message := []byte("Hello, world.")
ct, err := Encrypt(rand.Reader, &prv2.PublicKey, message, nil, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
pt, err := prv2.Decrypt(rand.Reader, ct, nil, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
if !bytes.Equal(pt, message) {
fmt.Println("ecies: plaintext doesn't match message")
t.FailNow()
}
_, err = prv1.Decrypt(rand.Reader, ct, nil, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
}
}
type testCase struct { type testCase struct {
Curve elliptic.Curve Curve elliptic.Curve
Name string Name string
Expected bool Expected *ECIESParams
} }
var testCases = []testCase{ var testCases = []testCase{
{ {
Curve: elliptic.P256(), Curve: elliptic.P256(),
Name: "P256", Name: "P256",
Expected: true, Expected: ECIES_AES128_SHA256,
}, },
{ {
Curve: elliptic.P384(), Curve: elliptic.P384(),
Name: "P384", Name: "P384",
Expected: true, Expected: ECIES_AES256_SHA384,
}, },
{ {
Curve: elliptic.P521(), Curve: elliptic.P521(),
Name: "P521", Name: "P521",
Expected: true, Expected: ECIES_AES256_SHA512,
}, },
} }
@ -519,10 +353,10 @@ func TestParamSelection(t *testing.T) {
func testParamSelection(t *testing.T, c testCase) { func testParamSelection(t *testing.T, c testCase) {
params := ParamsFromCurve(c.Curve) params := ParamsFromCurve(c.Curve)
if params == nil && c.Expected { if params == nil && c.Expected != nil {
fmt.Printf("%s (%s)\n", ErrInvalidParams.Error(), c.Name) fmt.Printf("%s (%s)\n", ErrInvalidParams.Error(), c.Name)
t.FailNow() t.FailNow()
} else if params != nil && !c.Expected { } else if params != nil && !cmpParams(params, c.Expected) {
fmt.Printf("ecies: parameters should be invalid (%s)\n", fmt.Printf("ecies: parameters should be invalid (%s)\n",
c.Name) c.Name)
t.FailNow() t.FailNow()

93
crypto/ecies/params.go
Unescape View File

@ -114,97 +114,4 @@ func AddParamsForCurve(curve elliptic.Curve, params *ECIESParams) {
// Only the curves P256, P384, and P512 are supported. // Only the curves P256, P384, and P512 are supported.
func ParamsFromCurve(curve elliptic.Curve) (params *ECIESParams) { func ParamsFromCurve(curve elliptic.Curve) (params *ECIESParams) {
return paramsFromCurve[curve] return paramsFromCurve[curve]
/*
switch curve {
case elliptic.P256():
return ECIES_AES128_SHA256
case elliptic.P384():
return ECIES_AES256_SHA384
case elliptic.P521():
return ECIES_AES256_SHA512
default:
return nil
}
*/
}
// ASN.1 encode the ECIES parameters relevant to the encryption operations.
func paramsToASNECIES(params *ECIESParams) (asnParams asnECIESParameters) {
if nil == params {
return
}
asnParams.KDF = asnNISTConcatenationKDF
asnParams.MAC = hmacFull
switch params.KeyLen {
case 16:
asnParams.Sym = aes128CTRinECIES
case 24:
asnParams.Sym = aes192CTRinECIES
case 32:
asnParams.Sym = aes256CTRinECIES
}
return
}
// ASN.1 encode the ECIES parameters relevant to ECDH.
func paramsToASNECDH(params *ECIESParams) (algo asnECDHAlgorithm) {
switch params.hashAlgo {
case crypto.SHA224:
algo = dhSinglePass_stdDH_sha224kdf
case crypto.SHA256:
algo = dhSinglePass_stdDH_sha256kdf
case crypto.SHA384:
algo = dhSinglePass_stdDH_sha384kdf
case crypto.SHA512:
algo = dhSinglePass_stdDH_sha512kdf
}
return
}
// ASN.1 decode the ECIES parameters relevant to the encryption stage.
func asnECIEStoParams(asnParams asnECIESParameters, params *ECIESParams) {
if !asnParams.KDF.Cmp(asnNISTConcatenationKDF) {
params = nil
return
} else if !asnParams.MAC.Cmp(hmacFull) {
params = nil
return
}
switch {
case asnParams.Sym.Cmp(aes128CTRinECIES):
params.KeyLen = 16
params.BlockSize = 16
params.Cipher = aes.NewCipher
case asnParams.Sym.Cmp(aes192CTRinECIES):
params.KeyLen = 24
params.BlockSize = 16
params.Cipher = aes.NewCipher
case asnParams.Sym.Cmp(aes256CTRinECIES):
params.KeyLen = 32
params.BlockSize = 16
params.Cipher = aes.NewCipher
default:
params = nil
}
}
// ASN.1 decode the ECIES parameters relevant to ECDH.
func asnECDHtoParams(asnParams asnECDHAlgorithm, params *ECIESParams) {
if asnParams.Cmp(dhSinglePass_stdDH_sha224kdf) {
params.hashAlgo = crypto.SHA224
params.Hash = sha256.New224
} else if asnParams.Cmp(dhSinglePass_stdDH_sha256kdf) {
params.hashAlgo = crypto.SHA256
params.Hash = sha256.New
} else if asnParams.Cmp(dhSinglePass_stdDH_sha384kdf) {
params.hashAlgo = crypto.SHA384
params.Hash = sha512.New384
} else if asnParams.Cmp(dhSinglePass_stdDH_sha512kdf) {
params.hashAlgo = crypto.SHA512
params.Hash = sha512.New
} else {
params = nil
}
} }

5
crypto/sha3/sha3.go
Unescape View File

@ -42,9 +42,8 @@ type state struct {
storage [maxRate]byte storage [maxRate]byte
// Specific to SHA-3 and SHAKE. // Specific to SHA-3 and SHAKE.
fixedOutput bool // whether this is a fixed-output-length instance outputLen int // the default output size in bytes
outputLen int // the default output size in bytes state spongeDirection // whether the sponge is absorbing or squeezing
state spongeDirection // whether the sponge is absorbing or squeezing
} }
// BlockSize returns the rate of sponge underlying this hash function. // BlockSize returns the rate of sponge underlying this hash function.

11
crypto/sha3/sha3_test.go
Unescape View File

@ -53,15 +53,6 @@ var testShakes = map[string]func() ShakeHash{
"SHAKE256": NewShake256, "SHAKE256": NewShake256,
} }
// decodeHex converts a hex-encoded string into a raw byte string.
func decodeHex(s string) []byte {
b, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return b
}
// structs used to marshal JSON test-cases. // structs used to marshal JSON test-cases.
type KeccakKats struct { type KeccakKats struct {
Kats map[string][]struct { Kats map[string][]struct {
@ -125,7 +116,7 @@ func TestKeccakKats(t *testing.T) {
// TestUnalignedWrite tests that writing data in an arbitrary pattern with // TestUnalignedWrite tests that writing data in an arbitrary pattern with
// small input buffers. // small input buffers.
func testUnalignedWrite(t *testing.T) { func TestUnalignedWrite(t *testing.T) {
testUnalignedAndGeneric(t, func(impl string) { testUnalignedAndGeneric(t, func(impl string) {
buf := sequentialBytes(0x10000) buf := sequentialBytes(0x10000)
for alg, df := range testDigests { for alg, df := range testDigests {

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