mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-11 05:06:51 +00:00
GODT-1779: Remove go-imap
This commit is contained in:
James Houlahan
273
internal/dialer/dialer_proxy_test.go
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273
internal/dialer/dialer_proxy_test.go
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@ -0,0 +1,273 @@
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// Copyright (c) 2022 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail 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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// Proton Mail 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 Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package dialer
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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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// 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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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 TestProxyDialer_UseProxy(t *testing.T) {
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trustedProxy := getTrustedServer()
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defer closeServer(trustedProxy)
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provider := newProxyProvider(NewBasicTLSDialer(""), "", DoHProviders)
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d := NewProxyTLSDialer(NewBasicTLSDialer(""), "")
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d.proxyProvider = provider
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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err := d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(trustedProxy.URL), d.proxyAddress)
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}
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func TestProxyDialer_UseProxy_MultipleTimes(t *testing.T) {
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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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provider := newProxyProvider(NewBasicTLSDialer(""), "", DoHProviders)
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d := NewProxyTLSDialer(NewBasicTLSDialer(""), "")
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d.proxyProvider = provider
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy1.URL}, nil }
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err := d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(proxy1.URL), d.proxyAddress)
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// Have to wait so as to not get rejected.
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time.Sleep(proxyLookupWait)
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy2.URL}, nil }
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err = d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(proxy2.URL), d.proxyAddress)
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// Have to wait so as to not get rejected.
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time.Sleep(proxyLookupWait)
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy3.URL}, nil }
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err = d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(proxy3.URL), d.proxyAddress)
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}
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func TestProxyDialer_UseProxy_RevertAfterTime(t *testing.T) {
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trustedProxy := getTrustedServer()
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defer closeServer(trustedProxy)
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provider := newProxyProvider(NewBasicTLSDialer(""), "", DoHProviders)
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d := NewProxyTLSDialer(NewBasicTLSDialer(""), "")
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d.proxyProvider = provider
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d.proxyUseDuration = time.Second
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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err := d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(trustedProxy.URL), d.proxyAddress)
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time.Sleep(2 * time.Second)
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require.Equal(t, ":443", d.proxyAddress)
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}
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func TestProxyDialer_UseProxy_RevertIfProxyStopsWorkingAndOriginalAPIIsReachable(t *testing.T) {
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trustedProxy := getTrustedServer()
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provider := newProxyProvider(NewBasicTLSDialer(""), "", DoHProviders)
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d := NewProxyTLSDialer(NewBasicTLSDialer(""), "")
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d.proxyProvider = provider
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{trustedProxy.URL}, nil }
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err := d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(trustedProxy.URL), d.proxyAddress)
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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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d.directAddress = formatAsAddress(getRootURL())
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provider.hostURL = getRootURL()
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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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err = d.switchToReachableServer()
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require.Error(t, err)
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require.Equal(t, formatAsAddress(getRootURL()), d.proxyAddress)
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}
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func TestProxyDialer_UseProxy_FindSecondAlternativeIfFirstFailsAndAPIIsStillBlocked(t *testing.T) {
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// proxy1 is closed later in this test so we don't defer it here.
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proxy1 := getTrustedServer()
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proxy2 := getTrustedServer()
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defer closeServer(proxy2)
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provider := newProxyProvider(NewBasicTLSDialer(""), "", DoHProviders)
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d := NewProxyTLSDialer(NewBasicTLSDialer(""), "")
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d.proxyProvider = provider
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provider.dohLookup = func(ctx context.Context, q, p string) ([]string, error) { return []string{proxy1.URL, proxy2.URL}, nil }
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err := d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(proxy1.URL), d.proxyAddress)
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// Have to wait so as to not get rejected.
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time.Sleep(proxyLookupWait)
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// The proxy stops working and the protonmail API is still blocked.
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closeServer(proxy1)
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// Should switch to the second proxy because both the first proxy and the protonmail API are blocked.
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err = d.switchToReachableServer()
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require.NoError(t, err)
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require.Equal(t, formatAsAddress(proxy2.URL), d.proxyAddress)
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}
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func TestFormatAsAddress(t *testing.T) {
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r := require.New(t)
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testData := map[string]string{
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"sub.domain.tld": "sub.domain.tld:443",
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"http://sub.domain.tld": "sub.domain.tld:80",
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"https://sub.domain.tld": "sub.domain.tld:443",
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"ftp://sub.domain.tld": "sub.domain.tld:443",
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"//sub.domain.tld": "sub.domain.tld:443",
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}
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for rawURL, wantURL := range testData {
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r.Equal(wantURL, formatAsAddress(rawURL))
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}
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}
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Block a user