Automated cherry pick of #11211

clientv3/balancer/resolver/endpoint/endpoint.go

@@ -227,14 +227,3 @@ func ParseTarget(target string) (string, string, error) {
 	}
 	return parts[0], parts[1], nil
 }
-
-// ParseHostPort splits a "<host>:<port>" string into the host and port parts.
-// The port part is optional.
-func ParseHostPort(hostPort string) (host string, port string) {
-	parts := strings.SplitN(hostPort, ":", 2)
-	host = parts[0]
-	if len(parts) > 1 {
-		port = parts[1]
-	}
-	return host, port
-}

clientv3/client.go

@@ -262,7 +262,10 @@ func (c *Client) dialSetupOpts(creds grpccredentials.TransportCredentials, dopts
 
 // Dial connects to a single endpoint using the client's config.
 func (c *Client) Dial(ep string) (*grpc.ClientConn, error) {
-	creds := c.directDialCreds(ep)
+	creds, err := c.directDialCreds(ep)
+	if err != nil {
+		return nil, err
+	}
 	// Use the grpc passthrough resolver to directly dial a single endpoint.
 	// This resolver passes through the 'unix' and 'unixs' endpoints schemes used
 	// by etcd without modification, allowing us to directly dial endpoints and
@@ -365,8 +368,8 @@ func (c *Client) dial(target string, creds grpccredentials.TransportCredentials,
 	return conn, nil
 }
 
-func (c *Client) directDialCreds(ep string) grpccredentials.TransportCredentials {
-	_, hostPort, scheme := endpoint.ParseEndpoint(ep)
+func (c *Client) directDialCreds(ep string) (grpccredentials.TransportCredentials, error) {
+	_, host, scheme := endpoint.ParseEndpoint(ep)
 	creds := c.creds
 	if len(scheme) != 0 {
 		creds = c.processCreds(scheme)
@@ -375,12 +378,17 @@ func (c *Client) directDialCreds(ep string) grpccredentials.TransportCredentials
 			// Set the server name must to the endpoint hostname without port since grpc
 			// otherwise attempts to check if x509 cert is valid for the full endpoint
 			// including the scheme and port, which fails.
-			host, _ := endpoint.ParseHostPort(hostPort)
-			clone.OverrideServerName(host)
+			overrideServerName, _, err := net.SplitHostPort(host)
+			if err != nil {
+				// Either the host didn't have a port or the host could not be parsed. Either way, continue with the
+				// original host string.
+				overrideServerName = host
+			}
+			clone.OverrideServerName(overrideServerName)
 			creds = clone
 		}
 	}
-	return creds
+	return creds, nil
 }
 
 func (c *Client) dialWithBalancerCreds(ep string) grpccredentials.TransportCredentials {

integration/fixtures/ca-key.pem

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+UFwPK69h//mf9k5++cbFRwKBgB2fXm6u/H0OHehNJEFGPiGvodYfikRqYG2AkEGD
+PyhCA32VMQqFZfcc/QowB2p7p/ERxFostZwXvXGmF3JVpww2asNpB1bcj/INKOTE
+ct0x3DW1qUZSEQRQakfU0SFc313MdBG305/bKasJ1Oc3sQwGoH3hy7DewU7DzUut
+MvYNAoGBAMHxoqdTi/9ewLhKxKdwvhsyRa9Ll9d9Y85+VoI/eAGAEY2iFq9aPzBA
+pdFBkPLoApLqoPPH3m0/RHO3t/yLsyjDuF1xPlBRAfnT9GF4kTvw8sMMPQoWDLoO
+qLq31y4yzdlKQTT9SauXb7KRfBj0ClG863dM6ot9YWqVBPKuV5Yk
+-----END RSA PRIVATE KEY-----

integration/fixtures/ca.crt

@@ -1,23 +1,22 @@
 -----BEGIN CERTIFICATE-----
-MIID0jCCArqgAwIBAgIUGMTka1d/PO3J5ui12qLiCKjR1rMwDQYJKoZIhvcNAQEL
+MIIDrjCCApagAwIBAgIUeR3i5w/rlikvZJQTuUqZqOnoygswDQYJKoZIhvcNAQEL
 BQAwbzEMMAoGA1UEBhMDVVNBMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQH
 Ew1TYW4gRnJhbmNpc2NvMQ0wCwYDVQQKEwRldGNkMRYwFAYDVQQLEw1ldGNkIFNl
-Y3VyaXR5MQswCQYDVQQDEwJjYTAeFw0xNzEwMDUyMTU5MDBaFw0yNzEwMDMyMTU5
+Y3VyaXR5MQswCQYDVQQDEwJjYTAeFw0xOTEwMDgyMjM4MDBaFw0yOTEwMDUyMjM4
 MDBaMG8xDDAKBgNVBAYTA1VTQTETMBEGA1UECBMKQ2FsaWZvcm5pYTEWMBQGA1UE
 BxMNU2FuIEZyYW5jaXNjbzENMAsGA1UEChMEZXRjZDEWMBQGA1UECxMNZXRjZCBT
 ZWN1cml0eTELMAkGA1UEAxMCY2EwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
-AoIBAQC/oSHQqlc05uZYMHHxkkF/eTM4uh7Z/6TSjChMfnNk+5rZJzwSkLeL47Am
-kmcGnB9xo4tKkiDjq6MbHwgK2YpgdF5rRSC89BYBWPVvSMxMWV4Pvx/q3mdUjh7N
-tb9udJxG6c3rgI+2t2zcx1+qFGeKw0JSHKpcI6UKNm7E/xY0lqJ0ptHruBgFQaqy
-VdqVa5QkyF2imnFEdgakO2EuQR3vVAr5sM552LLnngNsfsxLStxXWDJZ/+34k2ON
-jJy5KEQ1KgYmVwi8843yQRDkvAjZ4Z1LzbcQQ83/6oT3kAfsOjy8bdsxMZBWSA53
-W9LuKUOk6WLRY0S3vUjzdw8To15RAgMBAAGjZjBkMA4GA1UdDwEB/wQEAwIBBjAS
-BgNVHRMBAf8ECDAGAQH/AgECMB0GA1UdDgQWBBSt4lqZZ20BpzYG8GSym10Intbr
-EzAfBgNVHSMEGDAWgBSt4lqZZ20BpzYG8GSym10IntbrEzANBgkqhkiG9w0BAQsF
-AAOCAQEAA6TqqLkPdI6zuda71LL68myXbN2qdxzs7HK8jkGPM2cU6Ii0G66TvesM
-gf1k3VddbvF8mPCyhdLYRArQeDLxKDLq/efosOj/NiLtepXea6Ib7XEo2AKCe21S
-SpBAZ2Szx8mGa7IY3ISfxkY0PpGhe2G0Rf0kOX5SYhQ/4TdAoe2pr8jFX6b7Kbdl
-yBxq9nDYjSCA7fC5Yr3Pup7Uu9fh1TJr+62DMBeeQN1XFZ0hEdu5sk4jkNq3ijC7
-/vpDyzRduUGpbp8Jy4HzoyWrCmp+KEznEWNmXb/HoPHKBlAz0ovjzU+jnFYi9tVN
-WODbdeGuXqBBmdAGaWBEowVP8ZhdQg==
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+rYa5usa2Obd13qwgPSYYuUkAwpYy/s/cQLgAQu68ZHxsKg==
 -----END CERTIFICATE-----

integration/fixtures/ca.csr

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIC1jCCAb4CAQAwbzEMMAoGA1UEBhMDVVNBMRMwEQYDVQQIEwpDYWxpZm9ybmlh
+MRYwFAYDVQQHEw1TYW4gRnJhbmNpc2NvMQ0wCwYDVQQKEwRldGNkMRYwFAYDVQQL
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+LUSG/f8OEQ/AHg==
+-----END CERTIFICATE REQUEST-----

integration/fixtures/gencerts.sh

@@ -23,6 +23,15 @@ cfssl gencert \
 mv server.pem server.crt
 mv server-key.pem server.key.insecure
 
+# generate IPv6: [::1], CN: example.com certificates
+cfssl gencert \
+  --ca ./ca.crt \
+  --ca-key ./ca-key.pem \
+  --config ./gencert.json \
+  ./server-ca-csr-ipv6.json | cfssljson --bare ./server-ip
+mv server-ip.pem server-ipv6.crt
+mv server-ip-key.pem server-ipv6.key.insecure
+
 # generate DNS: localhost, IP: 127.0.0.1, CN: example2.com certificates
 cfssl gencert \
     --ca ./ca.crt \

integration/fixtures/server-ca-csr-ipv6.json

@@ -0,0 +1,19 @@
+{
+  "key": {
+    "algo": "rsa",
+    "size": 2048
+  },
+  "names": [
+    {
+      "O": "etcd",
+      "OU": "etcd Security",
+      "L": "San Francisco",
+      "ST": "California",
+      "C": "USA"
+    }
+  ],
+  "CN": "example.com",
+  "hosts": [
+    "::1"
+  ]
+}

integration/fixtures/server-ecdsa.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
+MIIDRzCCAi+gAwIBAgIUKgQJ/CMaFxc4JcwwGyiT/7KpedIwDQYJKoZIhvcNAQEL
+BQAwbzEMMAoGA1UEBhMDVVNBMRMwEQYDVQQIEwpDYWxpZm9ybmlhMRYwFAYDVQQH
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+-----END CERTIFICATE-----

integration/fixtures/server-ecdsa.key.insecure

@@ -0,0 +1,5 @@
+-----BEGIN EC PRIVATE KEY-----
+MHcCAQEEIK3K2gimOw2P0pZ4soFAopriuORuqpRptllFXNRhCRV0oAoGCCqGSM49
+AwEHoUQDQgAEV23PJ2ohWd2Ni7o65wwknFTUZLP00fmlz5p7jxow8W7h8UkmwvEN
+s4k7wpILCHLIn5lCBEHCOL9ym5I96jBdbA==
+-----END EC PRIVATE KEY-----

integration/fixtures/server-ip.crt

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
+MIIEBzCCAu+gAwIBAgIUSvxuG1lgImYpnaK4sPaCiMAd0lgwDQYJKoZIhvcNAQEL
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+-----END CERTIFICATE-----

integration/fixtures/server-ip.key.insecure

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
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integration/fixtures/server-ipv6.crt

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

integration/fixtures/server-ipv6.key.insecure

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----

integration/fixtures/server-revoked.crt

@@ -1,4 +1,5 @@
 -----BEGIN CERTIFICATE-----
+<<<<<<< HEAD
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+=======
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+>>>>>>> Replace endpoint.ParseHostPort with net.SplitHostPort to fix IPv6 client endpoints
 -----END CERTIFICATE-----