all: fix ineffectual assignments

audited using ineffassign tool from
github.com/gordonklaus/ineffassign
go generate does not generate any changes

Change-Id: Iabbec9ec1aae39081289d503d79fd7b4caadf17b
GitHub-Last-Rev: acd17cce410e9c68ce3c87b5546261be9153e3ea
GitHub-Pull-Request: golang/crypto#70
Reviewed-on: https://go-review.googlesource.com/c/155942
Reviewed-by: Filippo Valsorda <filippo@golang.org>

nacl/sign/sign_test.go

@@ -40,7 +40,7 @@ func TestOpen(t *testing.T) {
 	if !bytes.Equal(message, testMessage) {
 		t.Fatalf("message did not match, got\n%x\n, expected\n%x", message, testMessage)
 	}
-	message, ok = Open(nil, testSignedMessage[1:], &testPublicKey)
+	_, ok = Open(nil, testSignedMessage[1:], &testPublicKey)
 	if ok {
 		t.Fatalf("invalid signed message successfully verified")
 	}

ocsp/ocsp.go

@@ -487,6 +487,9 @@ func ParseResponseForCert(bytes []byte, cert, issuer *x509.Certificate) (*Respon
 	if err != nil {
 		return nil, err
 	}
+	if len(rest) > 0 {
+		return nil, ParseError("trailing data in OCSP response")
+	}
 
 	if n := len(basicResp.TBSResponseData.Responses); n == 0 || cert == nil && n > 1 {
 		return nil, ParseError("OCSP response contains bad number of responses")

openpgp/packet/opaque_test.go

@@ -32,7 +32,7 @@ func TestOpaqueParseReason(t *testing.T) {
 			break
 		}
 		// try to parse opaque packet
-		p, err := op.Parse()
+		p, _ := op.Parse()
 		switch pkt := p.(type) {
 		case *UserId:
 			uid = pkt

otr/otr.go

@@ -637,7 +637,7 @@ func (c *Conversation) serializeDHKey() []byte {
 }
 
 func (c *Conversation) processDHKey(in []byte) (isSame bool, err error) {
-	gy, in, ok := getMPI(in)
+	gy, _, ok := getMPI(in)
 	if !ok {
 		err = errors.New("otr: corrupt DH key message")
 		return

ssh/agent/client_test.go

@@ -444,14 +444,14 @@ func (r *keyringExtended) Extension(extensionType string, contents []byte) ([]by
 func TestAgentExtensions(t *testing.T) {
 	agent, _, cleanup := startOpenSSHAgent(t)
 	defer cleanup()
-	result, err := agent.Extension("my-extension@example.com", []byte{0x00, 0x01, 0x02})
+	_, err := agent.Extension("my-extension@example.com", []byte{0x00, 0x01, 0x02})
 	if err == nil {
 		t.Fatal("should have gotten agent extension failure")
 	}
 
 	agent, cleanup = startAgent(t, &keyringExtended{})
 	defer cleanup()
-	result, err = agent.Extension("my-extension@example.com", []byte{0x00, 0x01, 0x02})
+	result, err := agent.Extension("my-extension@example.com", []byte{0x00, 0x01, 0x02})
 	if err != nil {
 		t.Fatalf("agent extension failure: %v", err)
 	}
@@ -459,7 +459,7 @@ func TestAgentExtensions(t *testing.T) {
 		t.Fatalf("agent extension result invalid: %v", result)
 	}
 
-	result, err = agent.Extension("bad-extension@example.com", []byte{0x00, 0x01, 0x02})
+	_, err = agent.Extension("bad-extension@example.com", []byte{0x00, 0x01, 0x02})
 	if err == nil {
 		t.Fatal("should have gotten agent extension failure")
 	}

ssh/benchmark_test.go

@@ -93,6 +93,9 @@ func BenchmarkEndToEnd(b *testing.B) {
 			b.Fatalf("Client: %v", err)
 		}
 		ch, incoming, err := newCh.Accept()
+		if err != nil {
+			b.Fatalf("Accept: %v", err)
+		}
 		go DiscardRequests(incoming)
 		for i := 0; i < b.N; i++ {
 			if _, err := io.ReadFull(ch, output); err != nil {