forked from Silverfish/proton-bridge
469 lines
16 KiB
Go
469 lines
16 KiB
Go
// Copyright (c) 2020 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// ProtonMail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package pmapi
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import (
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"context"
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"crypto/tls"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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"github.com/stretchr/testify/require"
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)
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const (
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TestDoHQuery = "dMFYGSLTQOJXXI33ONVQWS3BOMNUA.protonpro.xyz"
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TestQuad9Provider = "https://dns11.quad9.net/dns-query"
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TestGoogleProvider = "https://dns.google/dns-query"
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)
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// getTrustedServer returns a server and sets its public key as one of the pinned ones.
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func getTrustedServer() *httptest.Server {
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return getTrustedServerWithHandler(
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http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
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// Do nothing.
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}),
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)
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}
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func getTrustedServerWithHandler(handler http.HandlerFunc) *httptest.Server {
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proxy := httptest.NewTLSServer(handler)
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pin := certFingerprint(proxy.Certificate())
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TrustedAPIPins = append(TrustedAPIPins, pin)
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return proxy
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}
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// server.crt
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const servercrt = `
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-----BEGIN CERTIFICATE-----
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MIIE5TCCA82gAwIBAgIJAKsmhcMFGfGcMA0GCSqGSIb3DQEBCwUAMIGsMQswCQYD
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VQQGEwJVUzEUMBIGA1UECAwLUmFuZG9tU3RhdGUxEzARBgNVBAcMClJhbmRvbUNp
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dHkxGzAZBgNVBAoMElJhbmRvbU9yZ2FuaXphdGlvbjEfMB0GA1UECwwWUmFuZG9t
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T3JnYW5pemF0aW9uVW5pdDEgMB4GCSqGSIb3DQEJARYRaGVsbG9AZXhhbXBsZS5j
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b20xEjAQBgNVBAMMCTEyNy4wLjAuMTAeFw0yMDA0MjQxMzI3MzdaFw0yMTA5MDYx
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MzI3MzdaMIGsMQswCQYDVQQGEwJVUzEUMBIGA1UECAwLUmFuZG9tU3RhdGUxEzAR
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BgNVBAcMClJhbmRvbUNpdHkxGzAZBgNVBAoMElJhbmRvbU9yZ2FuaXphdGlvbjEf
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MB0GA1UECwwWUmFuZG9tT3JnYW5pemF0aW9uVW5pdDEgMB4GCSqGSIb3DQEJARYR
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aGVsbG9AZXhhbXBsZS5jb20xEjAQBgNVBAMMCTEyNy4wLjAuMTCCASIwDQYJKoZI
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hvcNAQEBBQADggEPADCCAQoCggEBANAnYyqhosWwNzGjBwSwmDUINOaPs4TSTgKt
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r6CE01atxAWzWUCyYqnQ4fPe5q2tx5t/VrmnTNpzycammKJszGLlmj9DFxSiYVw2
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pTTK3DBWFkfTwxq98mM7wMnCWy1T2L2pmuYjnd7Pa6pQa9OHYoJwRzlIl2Q3YVdM
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GIBDbkW728A1dcelkIdFpv3r3ayTZv01vU8JMXd4PLHwXU0x0hHlH52+kx+9Ndru
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rdqqV6LqVfNlSR1jFZkwLBBqvh3XrJRD9Q01EAX6m+ufZ0yq8mK9ifMRtwQet10c
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kKMnx63MwvxDFmqrBj4HMtIRUpK+LBDs1ke7DvS0eLqaojWl28ECAwEAAaOCAQYw
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ggECMIHLBgNVHSMEgcMwgcChgbKkga8wgawxCzAJBgNVBAYTAlVTMRQwEgYDVQQI
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DAtSYW5kb21TdGF0ZTETMBEGA1UEBwwKUmFuZG9tQ2l0eTEbMBkGA1UECgwSUmFu
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ZG9tT3JnYW5pemF0aW9uMR8wHQYDVQQLDBZSYW5kb21Pcmdhbml6YXRpb25Vbml0
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MSAwHgYJKoZIhvcNAQkBFhFoZWxsb0BleGFtcGxlLmNvbTESMBAGA1UEAwwJMTI3
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LjAuMC4xggkAvCxbs152YckwCQYDVR0TBAIwADALBgNVHQ8EBAMCBPAwGgYDVR0R
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BBMwEYIJMTI3LjAuMC4xhwR/AAABMA0GCSqGSIb3DQEBCwUAA4IBAQAC7ZycZMZ5
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L+cjIpwSj0cemLkVD+kcFUCkI7ket5gbX1PmavmnpuFl9Sru0eJ5wyJ+97MQElPA
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CNFgXoX7DbJWkcd/LSksvZoJnpc1sTqFKMWFmOUxmUD62lCacuhqE27ZTThQ/53P
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3doLa74rKzUqlPI8OL4R34FY2deL7t5l2KSnpf7CKNeF5bkinAsn6NBqyZs2KPmg
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yT1/POdlRewzGSqBTMdktNQ4vKSfdFjcfVeo8PSHBgbGXZ5KoHZ6R6DNJehEh27l
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z3OteROLGoii+w3OllLq6JATif2MDIbH0s/KjGjbXSSGbM/rZu5eBZm5/vksGAzc
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u53wgIhCJGuX
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-----END CERTIFICATE-----
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`
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const serverkey = `
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-----BEGIN PRIVATE KEY-----
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MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQDQJ2MqoaLFsDcx
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owcEsJg1CDTmj7OE0k4Cra+ghNNWrcQFs1lAsmKp0OHz3uatrcebf1a5p0zac8nG
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ppiibMxi5Zo/QxcUomFcNqU0ytwwVhZH08MavfJjO8DJwlstU9i9qZrmI53ez2uq
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UGvTh2KCcEc5SJdkN2FXTBiAQ25Fu9vANXXHpZCHRab9692sk2b9Nb1PCTF3eDyx
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8F1NMdIR5R+dvpMfvTXa7q3aqlei6lXzZUkdYxWZMCwQar4d16yUQ/UNNRAF+pvr
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n2dMqvJivYnzEbcEHrddHJCjJ8etzML8QxZqqwY+BzLSEVKSviwQ7NZHuw70tHi6
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mqI1pdvBAgMBAAECggEAOqqPOYm63arPs462QK0hCPlaJ41i1FGNqRWYxU4KXoi1
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EcI9qo1cX24+8MPnEhZDhuD56XNsprkxqmpz5Htzk4AQ3DmlfKxTcnD4WQu/yWPJ
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/c6CU7wrX6qMqJC9r+XM1Y/C15A8Q3sEZkkqSsECk67fdBawjI9LQRZyZVwb7U0F
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qtvbKM7VQA6hrgdSmXWJ+spp5yymVFF22Ssz31SSbCI93bnp3mukRCKWdRmA9pmT
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VXa0HzJ5p70WC+Se9nA/1riWGKt4HCmjVeEtZuiwaUTlXDSeYpu2e4QrX1OnUXBu
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Z7yfviTqA8o7KfiA6urumFbAMJcibxkWJoWacc5tTQKBgQD39ZdtNz8B6XJy7f5h
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bo9Ag9OrkVX+HITQyWKpcCDba9SuIX3/F++2AK4oeJ3aHKMJWiP19hQvGS1xE67X
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TKejOsQxORn6nAYQpFd3AOBOtKAC+VQITBqlfq2ukGmvcQ1O31hMOFbZagFA5cpU
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LYb9VVDsZzhM7CccIn/EGEZjgwKBgQDW51rUA2S9naV/iEGhw1tuhoQ5OADD/n8f
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pPIkbGxmACDaX/7jt+UwlDU0EsI+aBlJUDqGiEZ5z3UPmaSJUdfRCeJEdKIe1GLm
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nqF3sF6Aq+S/79v/wKYn+MHcoiWog5n3McLzZ3+0rwrhMREjE2eWPwVHz/jJIFP3
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Pp3+UZVsawKBgB4Az5PdjXgzwS968L7lW9wYl3I5Iciftsp0s8WA1dj3EUMItnA5
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ez3wkyI+hgswT+H/0D4gyoxwZXk7Qnq2wcoUgEzcdfJHEszMtfCmYH3liT8S4EIo
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w0inLWjj/IXIDi4vBEYkww2HsCMkKvlIkP7yZdpVGxDjuk/DNOaLcWj1AoGAXuyK
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PiPRl7/Onmp9MwqrlEJunSeTjv8W/89H9ba+mr9rw4mreMJ9xdtxNLMkgZRRtwRt
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FYeUObHdLyradp1kCr2m6D3sblm55cwj3k5VL9i9jdpQ/sMFoZpLZz1oDOs0Uu/0
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ALeyvQikcZvOygOEOeVUW8gNSCmzbP6HoxI+QkkCgYBCI6oL4GPcPPqzd+2djbOD
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z3rVUyHzYc1KUcBixK/uaRQKM886k4CL8/GvbHHI/yoZ7xWJGnBi59DtpqnGTZJ2
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FDJwYIlQKhZmsyVcZu/4smsaejGnHn/liksVlgesSwCtOrsd2AC8fBXSyrTWJx8o
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vwRMog6lPhlRhHh/FZ43Cg==
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-----END PRIVATE KEY-----
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`
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// getUntrustedServer returns a server but it doesn't add its public key to the list of pinned ones.
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func getUntrustedServer() *httptest.Server {
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server := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
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cert, err := tls.X509KeyPair([]byte(servercrt), []byte(serverkey))
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if err != nil {
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panic(err)
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}
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server.TLS = &tls.Config{Certificates: []tls.Certificate{cert}}
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server.StartTLS()
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return server
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}
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// closeServer closes the given server. If it is a trusted server, its cert is removed from the trusted public keys.
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func closeServer(server *httptest.Server) {
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pin := certFingerprint(server.Certificate())
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for i := range TrustedAPIPins {
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if TrustedAPIPins[i] == pin {
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TrustedAPIPins = append(TrustedAPIPins[:i], TrustedAPIPins[i:]...)
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break
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}
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}
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server.Close()
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}
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func TestProxyProvider_FindProxy(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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proxy := getTrustedServer()
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defer closeServer(proxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy.URL}, nil }
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url, err := p.findReachableServer()
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require.NoError(t, err)
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require.Equal(t, proxy.URL, url)
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}
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func TestProxyProvider_FindProxy_ChooseReachableProxy(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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reachableProxy := getTrustedServer()
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defer closeServer(reachableProxy)
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// We actually close the unreachable proxy straight away rather than deferring the closure.
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unreachableProxy := getTrustedServer()
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closeServer(unreachableProxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) {
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return []string{reachableProxy.URL, unreachableProxy.URL}, nil
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}
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url, err := p.findReachableServer()
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require.NoError(t, err)
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require.Equal(t, reachableProxy.URL, url)
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}
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func TestProxyProvider_FindProxy_ChooseTrustedProxy(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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trustedProxy := getTrustedServer()
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defer closeServer(trustedProxy)
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untrustedProxy := getUntrustedServer()
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defer closeServer(untrustedProxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) {
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return []string{untrustedProxy.URL, trustedProxy.URL}, nil
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}
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url, err := p.findReachableServer()
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require.NoError(t, err)
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require.Equal(t, trustedProxy.URL, url)
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}
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func TestProxyProvider_FindProxy_FailIfNoneReachable(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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unreachableProxy1 := getTrustedServer()
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closeServer(unreachableProxy1)
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unreachableProxy2 := getTrustedServer()
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closeServer(unreachableProxy2)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) {
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return []string{unreachableProxy1.URL, unreachableProxy2.URL}, nil
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}
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_, err := p.findReachableServer()
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require.Error(t, err)
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}
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func TestProxyProvider_FindProxy_FailIfNoneTrusted(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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untrustedProxy1 := getUntrustedServer()
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defer closeServer(untrustedProxy1)
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untrustedProxy2 := getUntrustedServer()
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defer closeServer(untrustedProxy2)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) {
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return []string{untrustedProxy1.URL, untrustedProxy2.URL}, nil
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}
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_, err := p.findReachableServer()
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require.Error(t, err)
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}
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func TestProxyProvider_FindProxy_RefreshCacheTimeout(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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p := newProxyProvider([]string{"not used"}, "not used")
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p.cacheRefreshTimeout = 1 * time.Second
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { time.Sleep(2 * time.Second); return nil, nil }
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// We should fail to refresh the proxy cache because the doh provider
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// takes 2 seconds to respond but we timeout after just 1 second.
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_, err := p.findReachableServer()
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require.Error(t, err)
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}
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func TestProxyProvider_FindProxy_CanReachTimeout(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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slowProxy := getTrustedServerWithHandler(http.HandlerFunc(func(http.ResponseWriter, *http.Request) {
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time.Sleep(2 * time.Second)
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}))
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defer closeServer(slowProxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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p.canReachTimeout = 1 * time.Second
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{slowProxy.URL}, nil }
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// We should fail to reach the returned proxy because it takes 2 seconds
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// to reach it and we only allow 1.
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_, err := p.findReachableServer()
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require.Error(t, err)
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}
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func TestProxyProvider_UseProxy(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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cm := newTestClientManager(testClientConfig)
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trustedProxy := getTrustedServer()
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defer closeServer(trustedProxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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cm.proxyProvider = p
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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url, err := cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, trustedProxy.URL, url)
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require.Equal(t, trustedProxy.URL, cm.getHost())
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}
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func TestProxyProvider_UseProxy_MultipleTimes(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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cm := newTestClientManager(testClientConfig)
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proxy1 := getTrustedServer()
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defer closeServer(proxy1)
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proxy2 := getTrustedServer()
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defer closeServer(proxy2)
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proxy3 := getTrustedServer()
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defer closeServer(proxy3)
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p := newProxyProvider([]string{"not used"}, "not used")
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cm.proxyProvider = p
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy1.URL}, nil }
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url, err := cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, proxy1.URL, url)
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require.Equal(t, proxy1.URL, cm.getHost())
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// Have to wait so as to not get rejected.
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time.Sleep(proxyLookupWait)
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy2.URL}, nil }
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url, err = cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, proxy2.URL, url)
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require.Equal(t, proxy2.URL, cm.getHost())
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// Have to wait so as to not get rejected.
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time.Sleep(proxyLookupWait)
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy3.URL}, nil }
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url, err = cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, proxy3.URL, url)
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require.Equal(t, proxy3.URL, cm.getHost())
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}
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func TestProxyProvider_UseProxy_RevertAfterTime(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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cm := newTestClientManager(testClientConfig)
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trustedProxy := getTrustedServer()
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defer closeServer(trustedProxy)
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p := newProxyProvider([]string{"not used"}, "not used")
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cm.proxyProvider = p
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cm.proxyUseDuration = time.Second
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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url, err := cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, trustedProxy.URL, url)
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require.Equal(t, trustedProxy.URL, cm.getHost())
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time.Sleep(2 * time.Second)
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require.Equal(t, rootURL, cm.getHost())
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}
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func TestProxyProvider_UseProxy_RevertIfProxyStopsWorkingAndOriginalAPIIsReachable(t *testing.T) {
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blockAPI()
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defer unblockAPI()
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cm := newTestClientManager(testClientConfig)
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trustedProxy := getTrustedServer()
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p := newProxyProvider([]string{"not used"}, "not used")
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cm.proxyProvider = p
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p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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url, err := cm.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, trustedProxy.URL, url)
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require.Equal(t, trustedProxy.URL, cm.getHost())
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// Simulate that the proxy stops working and that the standard api is reachable again.
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closeServer(trustedProxy)
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unblockAPI()
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time.Sleep(proxyLookupWait)
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// We should now find the original API URL if it is working again.
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// The error should be ErrAPINotReachable because the connection dropped intermittently but
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// the original API is now reachable (see Alternative-Routing-v2 spec for details).
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url, err = cm.switchToReachableServer()
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|
require.EqualError(t, err, ErrAPINotReachable.Error())
|
|
require.Equal(t, rootURL, url)
|
|
require.Equal(t, rootURL, cm.getHost())
|
|
}
|
|
|
|
func TestProxyProvider_UseProxy_FindSecondAlternativeIfFirstFailsAndAPIIsStillBlocked(t *testing.T) {
|
|
blockAPI()
|
|
defer unblockAPI()
|
|
|
|
cm := newTestClientManager(testClientConfig)
|
|
|
|
// proxy1 is closed later in this test so we don't defer it here.
|
|
proxy1 := getTrustedServer()
|
|
|
|
proxy2 := getTrustedServer()
|
|
defer closeServer(proxy2)
|
|
|
|
p := newProxyProvider([]string{"not used"}, "not used")
|
|
cm.proxyProvider = p
|
|
|
|
// Find a proxy.
|
|
p.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy1.URL, proxy2.URL}, nil }
|
|
url, err := cm.switchToReachableServer()
|
|
require.NoError(t, err)
|
|
require.Equal(t, proxy1.URL, url)
|
|
require.Equal(t, proxy1.URL, cm.getHost())
|
|
|
|
// Have to wait so as to not get rejected.
|
|
time.Sleep(proxyLookupWait)
|
|
|
|
// The proxy stops working and the protonmail API is still blocked.
|
|
proxy1.Close()
|
|
|
|
// Should switch to the second proxy because both the first proxy and the protonmail API are blocked.
|
|
url, err = cm.switchToReachableServer()
|
|
require.NoError(t, err)
|
|
require.Equal(t, proxy2.URL, url)
|
|
require.Equal(t, proxy2.URL, cm.getHost())
|
|
}
|
|
|
|
func TestProxyProvider_DoHLookup_Quad9(t *testing.T) {
|
|
p := newProxyProvider([]string{TestQuad9Provider, TestGoogleProvider}, TestDoHQuery)
|
|
|
|
records, err := p.dohLookup(context.Background(), TestDoHQuery, TestQuad9Provider)
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, records)
|
|
}
|
|
|
|
func TestProxyProvider_DoHLookup_Google(t *testing.T) {
|
|
p := newProxyProvider([]string{TestQuad9Provider, TestGoogleProvider}, TestDoHQuery)
|
|
|
|
records, err := p.dohLookup(context.Background(), TestDoHQuery, TestGoogleProvider)
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, records)
|
|
}
|
|
|
|
func TestProxyProvider_DoHLookup_FindProxy(t *testing.T) {
|
|
p := newProxyProvider([]string{TestQuad9Provider, TestGoogleProvider}, TestDoHQuery)
|
|
|
|
url, err := p.findReachableServer()
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, url)
|
|
}
|
|
|
|
func TestProxyProvider_DoHLookup_FindProxyFirstProviderUnreachable(t *testing.T) {
|
|
p := newProxyProvider([]string{"https://unreachable", TestGoogleProvider}, TestDoHQuery)
|
|
|
|
url, err := p.findReachableServer()
|
|
require.NoError(t, err)
|
|
require.NotEmpty(t, url)
|
|
}
|
|
|
|
// testAPIURLBackup is used to hold the globalOriginalURL because we clear it for test purposes and need to restore it.
|
|
var testAPIURLBackup = rootURL
|
|
|
|
// blockAPI prevents tests from reaching the standard API, forcing them to find a proxy.
|
|
func blockAPI() {
|
|
rootURL = ""
|
|
}
|
|
|
|
// unblockAPI allow tests to reach the standard API again.
|
|
func unblockAPI() {
|
|
rootURL = testAPIURLBackup
|
|
}
|