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ecies: drop randomness parameter from PrivateKey.Decrypt (#16374)

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The parameter `rand` is unused in `PrivateKey.Decrypt`. Decryption in
the ECIES encryption scheme is deterministic, so randomness isn't
needed.
This commit is contained in:
David Huie 2018-03-26 03:46:18 -07:00 committed by Péter Szilágyi
parent e9a1d8de34
commit 23ac783332
5 changed files with 17 additions and 17 deletions
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6
crypto/ecies/ecies.go
View File

@ -230,7 +230,7 @@ func symEncrypt(rand io.Reader, params *ECIESParams, key, m []byte) (ct []byte,
// symDecrypt carries out CTR decryption using the block cipher specified in
// the parameters
func symDecrypt(rand io.Reader, params *ECIESParams, key, ct []byte) (m []byte, err error) {
func symDecrypt(params *ECIESParams, key, ct []byte) (m []byte, err error) {
c, err := params.Cipher(key)
if err != nil {
return
@ -292,7 +292,7 @@ func Encrypt(rand io.Reader, pub *PublicKey, m, s1, s2 []byte) (ct []byte, err e
}
// Decrypt decrypts an ECIES ciphertext.
func (prv *PrivateKey) Decrypt(rand io.Reader, c, s1, s2 []byte) (m []byte, err error) {
func (prv *PrivateKey) Decrypt(c, s1, s2 []byte) (m []byte, err error) {
if len(c) == 0 {
return nil, ErrInvalidMessage
}
@ -361,6 +361,6 @@ func (prv *PrivateKey) Decrypt(rand io.Reader, c, s1, s2 []byte) (m []byte, err
return
}
m, err = symDecrypt(rand, params, Ke, c[mStart:mEnd])
m, err = symDecrypt(params, Ke, c[mStart:mEnd])
return
}

20
crypto/ecies/ecies_test.go
View File

@ -270,7 +270,7 @@ func TestEncryptDecrypt(t *testing.T) {
t.FailNow()
}
pt, err := prv2.Decrypt(rand.Reader, ct, nil, nil)
pt, err := prv2.Decrypt(ct, nil, nil)
if err != nil {
fmt.Println(err.Error())
t.FailNow()
@ -281,7 +281,7 @@ func TestEncryptDecrypt(t *testing.T) {
t.FailNow()
}
_, err = prv1.Decrypt(rand.Reader, ct, nil, nil)
_, err = prv1.Decrypt(ct, nil, nil)
if err == nil {
fmt.Println("ecies: encryption should not have succeeded")
t.FailNow()
@ -301,7 +301,7 @@ func TestDecryptShared2(t *testing.T) {
}
// Check that decrypting with correct shared data works.
pt, err := prv.Decrypt(rand.Reader, ct, nil, shared2)
pt, err := prv.Decrypt(ct, nil, shared2)
if err != nil {
t.Fatal(err)
}
@ -310,10 +310,10 @@ func TestDecryptShared2(t *testing.T) {
}
// Decrypting without shared data or incorrect shared data fails.
if _, err = prv.Decrypt(rand.Reader, ct, nil, nil); err == nil {
if _, err = prv.Decrypt(ct, nil, nil); err == nil {
t.Fatal("ecies: decrypting without shared data didn't fail")
}
if _, err = prv.Decrypt(rand.Reader, ct, nil, []byte("garbage")); err == nil {
if _, err = prv.Decrypt(ct, nil, []byte("garbage")); err == nil {
t.Fatal("ecies: decrypting with incorrect shared data didn't fail")
}
}
@ -381,7 +381,7 @@ func testParamSelection(t *testing.T, c testCase) {
t.FailNow()
}
pt, err := prv2.Decrypt(rand.Reader, ct, nil, nil)
pt, err := prv2.Decrypt(ct, nil, nil)
if err != nil {
fmt.Printf("%s (%s)\n", err.Error(), c.Name)
t.FailNow()
@ -393,7 +393,7 @@ func testParamSelection(t *testing.T, c testCase) {
t.FailNow()
}
_, err = prv1.Decrypt(rand.Reader, ct, nil, nil)
_, err = prv1.Decrypt(ct, nil, nil)
if err == nil {
fmt.Printf("ecies: encryption should not have succeeded (%s)\n",
c.Name)
@ -422,7 +422,7 @@ func TestBasicKeyValidation(t *testing.T) {
for _, b := range badBytes {
ct[0] = b
_, err := prv.Decrypt(rand.Reader, ct, nil, nil)
_, err := prv.Decrypt(ct, nil, nil)
if err != ErrInvalidPublicKey {
fmt.Println("ecies: validated an invalid key")
t.FailNow()
@ -441,14 +441,14 @@ func TestBox(t *testing.T) {
t.Fatal(err)
}
pt, err := prv2.Decrypt(rand.Reader, ct, nil, nil)
pt, err := prv2.Decrypt(ct, nil, nil)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(pt, message) {
t.Fatal("ecies: plaintext doesn't match message")
}
if _, err = prv1.Decrypt(rand.Reader, ct, nil, nil); err == nil {
if _, err = prv1.Decrypt(ct, nil, nil); err == nil {
t.Fatal("ecies: encryption should not have succeeded")
}
}

4
p2p/rlpx.go
View File

@ -491,7 +491,7 @@ func readHandshakeMsg(msg plainDecoder, plainSize int, prv *ecdsa.PrivateKey, r
}
// Attempt decoding pre-EIP-8 "plain" format.
key := ecies.ImportECDSA(prv)
if dec, err := key.Decrypt(rand.Reader, buf, nil, nil); err == nil {
if dec, err := key.Decrypt(buf, nil, nil); err == nil {
msg.decodePlain(dec)
return buf, nil
}
@ -505,7 +505,7 @@ func readHandshakeMsg(msg plainDecoder, plainSize int, prv *ecdsa.PrivateKey, r
if _, err := io.ReadFull(r, buf[plainSize:]); err != nil {
return buf, err
}
dec, err := key.Decrypt(rand.Reader, buf[2:], nil, prefix)
dec, err := key.Decrypt(buf[2:], nil, prefix)
if err != nil {
return buf, err
}

2
whisper/whisperv5/message.go
View File

@ -277,7 +277,7 @@ func (msg *ReceivedMessage) decryptSymmetric(key []byte, nonce []byte) error {
// decryptAsymmetric decrypts an encrypted payload with a private key.
func (msg *ReceivedMessage) decryptAsymmetric(key *ecdsa.PrivateKey) error {
decrypted, err := ecies.ImportECDSA(key).Decrypt(crand.Reader, msg.Raw, nil, nil)
decrypted, err := ecies.ImportECDSA(key).Decrypt(msg.Raw, nil, nil)
if err == nil {
msg.Raw = decrypted
}

2
whisper/whisperv6/message.go
View File

@ -289,7 +289,7 @@ func (msg *ReceivedMessage) decryptSymmetric(key []byte) error {
// decryptAsymmetric decrypts an encrypted payload with a private key.
func (msg *ReceivedMessage) decryptAsymmetric(key *ecdsa.PrivateKey) error {
decrypted, err := ecies.ImportECDSA(key).Decrypt(crand.Reader, msg.Raw, nil, nil)
decrypted, err := ecies.ImportECDSA(key).Decrypt(msg.Raw, nil, nil)
if err == nil {
msg.Raw = decrypted
}