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// Copyright 2015 Matthew Holt
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package certmagic
import (
"crypto/tls"
"crypto/x509"
"net"
"testing"
)
func TestGetCertificate(t *testing.T) {
c := &Cache{
cache: make(map[string]Certificate),
cacheIndex: make(map[string][]string),
logger: defaultTestLogger,
}
cfg := &Config{Logger: defaultTestLogger, certCache: c}
// create a test connection for conn.LocalAddr()
l, _ := net.Listen("tcp", "127.0.0.1:0")
defer l.Close()
conn, _ := net.Dial("tcp", l.Addr().String())
if conn == nil {
t.Errorf("failed to create a test connection")
}
defer conn.Close()
hello := &tls.ClientHelloInfo{ServerName: "example.com", Conn: conn}
helloSub := &tls.ClientHelloInfo{ServerName: "sub.example.com", Conn: conn}
helloNoSNI := &tls.ClientHelloInfo{Conn: conn}
helloNoMatch := &tls.ClientHelloInfo{ServerName: "nomatch", Conn: conn}
// When cache is empty
if cert, err := cfg.GetCertificate(hello); err == nil {
t.Errorf("GetCertificate should return error when cache is empty, got: %v", cert)
}
if cert, err := cfg.GetCertificate(helloNoSNI); err == nil {
t.Errorf("GetCertificate should return error when cache is empty even if server name is blank, got: %v", cert)
}
// When cache has one certificate in it
firstCert := Certificate{Names: []string{"example.com"}, Certificate: tls.Certificate{Leaf: &x509.Certificate{DNSNames: []string{"example.com"}}}}
c.cacheCertificate(firstCert)
if cert, err := cfg.GetCertificate(hello); err != nil {
t.Errorf("Got an error but shouldn't have, when cert exists in cache: %v", err)
} else if cert.Leaf.DNSNames[0] != "example.com" {
t.Errorf("Got wrong certificate with exact match; expected 'example.com', got: %v", cert)
}
if _, err := cfg.GetCertificate(helloNoSNI); err == nil {
t.Errorf("Did not get an error with no SNI and no DefaultServerName, but should have: %v", err)
}
// When retrieving wildcard certificate
wildcardCert := Certificate{
Names: []string{"*.example.com"},
Certificate: tls.Certificate{Leaf: &x509.Certificate{DNSNames: []string{"*.example.com"}}},
hash: "(don't overwrite the first one)",
}
c.cacheCertificate(wildcardCert)
if cert, err := cfg.GetCertificate(helloSub); err != nil {
t.Errorf("Didn't get wildcard cert, got: cert=%v, err=%v ", cert, err)
} else if cert.Leaf.DNSNames[0] != "*.example.com" {
t.Errorf("Got wrong certificate, expected wildcard: %v", cert)
}
// When cache is NOT empty but there's no SNI
if _, err := cfg.GetCertificate(helloNoSNI); err == nil {
t.Errorf("Expected TLS allert when no SNI and no DefaultServerName, but got: %v", err)
}
// When no certificate matches, raise an alert
if _, err := cfg.GetCertificate(helloNoMatch); err == nil {
t.Errorf("Expected an error when no certificate matched the SNI, got: %v", err)
}
// When default SNI is set and SNI is missing, retrieve default cert
cfg.DefaultServerName = "example.com"
if cert, err := cfg.GetCertificate(helloNoSNI); err != nil {
t.Errorf("Got an error with no SNI with DefaultServerName, but shouldn't have: %v", err)
} else if cert == nil || cert.Leaf.DNSNames[0] != "example.com" {
t.Errorf("Expected default cert, got: %v", cert)
}
// When default SNI is set and SNI is missing but IP address matches, retrieve IP cert
ipCert := Certificate{
Names: []string{"127.0.0.1"},
Certificate: tls.Certificate{Leaf: &x509.Certificate{IPAddresses: []net.IP{net.ParseIP("127.0.0.1")}}},
hash: "(don't overwrite the first or second one)",
}
c.cacheCertificate(ipCert)
if cert, err := cfg.GetCertificate(helloNoSNI); err != nil {
t.Errorf("Got an error with no SNI but matching IP, but shouldn't have: %v", err)
} else if cert == nil || len(cert.Leaf.IPAddresses) == 0 {
t.Errorf("Expected IP cert, got: %v", cert)
}
}
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