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Diffstat (limited to 'src/net/smtp/smtp_test.go')
-rw-r--r--src/net/smtp/smtp_test.go694
1 files changed, 694 insertions, 0 deletions
diff --git a/src/net/smtp/smtp_test.go b/src/net/smtp/smtp_test.go
new file mode 100644
index 000000000..5c659e8a0
--- /dev/null
+++ b/src/net/smtp/smtp_test.go
@@ -0,0 +1,694 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package smtp
+
+import (
+ "bufio"
+ "bytes"
+ "crypto/tls"
+ "crypto/x509"
+ "io"
+ "net"
+ "net/textproto"
+ "strings"
+ "testing"
+ "time"
+)
+
+type authTest struct {
+ auth Auth
+ challenges []string
+ name string
+ responses []string
+}
+
+var authTests = []authTest{
+ {PlainAuth("", "user", "pass", "testserver"), []string{}, "PLAIN", []string{"\x00user\x00pass"}},
+ {PlainAuth("foo", "bar", "baz", "testserver"), []string{}, "PLAIN", []string{"foo\x00bar\x00baz"}},
+ {CRAMMD5Auth("user", "pass"), []string{"<123456.1322876914@testserver>"}, "CRAM-MD5", []string{"", "user 287eb355114cf5c471c26a875f1ca4ae"}},
+}
+
+func TestAuth(t *testing.T) {
+testLoop:
+ for i, test := range authTests {
+ name, resp, err := test.auth.Start(&ServerInfo{"testserver", true, nil})
+ if name != test.name {
+ t.Errorf("#%d got name %s, expected %s", i, name, test.name)
+ }
+ if !bytes.Equal(resp, []byte(test.responses[0])) {
+ t.Errorf("#%d got response %s, expected %s", i, resp, test.responses[0])
+ }
+ if err != nil {
+ t.Errorf("#%d error: %s", i, err)
+ }
+ for j := range test.challenges {
+ challenge := []byte(test.challenges[j])
+ expected := []byte(test.responses[j+1])
+ resp, err := test.auth.Next(challenge, true)
+ if err != nil {
+ t.Errorf("#%d error: %s", i, err)
+ continue testLoop
+ }
+ if !bytes.Equal(resp, expected) {
+ t.Errorf("#%d got %s, expected %s", i, resp, expected)
+ continue testLoop
+ }
+ }
+ }
+}
+
+func TestAuthPlain(t *testing.T) {
+ auth := PlainAuth("foo", "bar", "baz", "servername")
+
+ tests := []struct {
+ server *ServerInfo
+ err string
+ }{
+ {
+ server: &ServerInfo{Name: "servername", TLS: true},
+ },
+ {
+ // Okay; explicitly advertised by server.
+ server: &ServerInfo{Name: "servername", Auth: []string{"PLAIN"}},
+ },
+ {
+ server: &ServerInfo{Name: "servername", Auth: []string{"CRAM-MD5"}},
+ err: "unencrypted connection",
+ },
+ {
+ server: &ServerInfo{Name: "attacker", TLS: true},
+ err: "wrong host name",
+ },
+ }
+ for i, tt := range tests {
+ _, _, err := auth.Start(tt.server)
+ got := ""
+ if err != nil {
+ got = err.Error()
+ }
+ if got != tt.err {
+ t.Errorf("%d. got error = %q; want %q", i, got, tt.err)
+ }
+ }
+}
+
+type faker struct {
+ io.ReadWriter
+}
+
+func (f faker) Close() error { return nil }
+func (f faker) LocalAddr() net.Addr { return nil }
+func (f faker) RemoteAddr() net.Addr { return nil }
+func (f faker) SetDeadline(time.Time) error { return nil }
+func (f faker) SetReadDeadline(time.Time) error { return nil }
+func (f faker) SetWriteDeadline(time.Time) error { return nil }
+
+func TestBasic(t *testing.T) {
+ server := strings.Join(strings.Split(basicServer, "\n"), "\r\n")
+ client := strings.Join(strings.Split(basicClient, "\n"), "\r\n")
+
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ var fake faker
+ fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
+ c := &Client{Text: textproto.NewConn(fake), localName: "localhost"}
+
+ if err := c.helo(); err != nil {
+ t.Fatalf("HELO failed: %s", err)
+ }
+ if err := c.ehlo(); err == nil {
+ t.Fatalf("Expected first EHLO to fail")
+ }
+ if err := c.ehlo(); err != nil {
+ t.Fatalf("Second EHLO failed: %s", err)
+ }
+
+ c.didHello = true
+ if ok, args := c.Extension("aUtH"); !ok || args != "LOGIN PLAIN" {
+ t.Fatalf("Expected AUTH supported")
+ }
+ if ok, _ := c.Extension("DSN"); ok {
+ t.Fatalf("Shouldn't support DSN")
+ }
+
+ if err := c.Mail("user@gmail.com"); err == nil {
+ t.Fatalf("MAIL should require authentication")
+ }
+
+ if err := c.Verify("user1@gmail.com"); err == nil {
+ t.Fatalf("First VRFY: expected no verification")
+ }
+ if err := c.Verify("user2@gmail.com"); err != nil {
+ t.Fatalf("Second VRFY: expected verification, got %s", err)
+ }
+
+ // fake TLS so authentication won't complain
+ c.tls = true
+ c.serverName = "smtp.google.com"
+ if err := c.Auth(PlainAuth("", "user", "pass", "smtp.google.com")); err != nil {
+ t.Fatalf("AUTH failed: %s", err)
+ }
+
+ if err := c.Mail("user@gmail.com"); err != nil {
+ t.Fatalf("MAIL failed: %s", err)
+ }
+ if err := c.Rcpt("golang-nuts@googlegroups.com"); err != nil {
+ t.Fatalf("RCPT failed: %s", err)
+ }
+ msg := `From: user@gmail.com
+To: golang-nuts@googlegroups.com
+Subject: Hooray for Go
+
+Line 1
+.Leading dot line .
+Goodbye.`
+ w, err := c.Data()
+ if err != nil {
+ t.Fatalf("DATA failed: %s", err)
+ }
+ if _, err := w.Write([]byte(msg)); err != nil {
+ t.Fatalf("Data write failed: %s", err)
+ }
+ if err := w.Close(); err != nil {
+ t.Fatalf("Bad data response: %s", err)
+ }
+
+ if err := c.Quit(); err != nil {
+ t.Fatalf("QUIT failed: %s", err)
+ }
+
+ bcmdbuf.Flush()
+ actualcmds := cmdbuf.String()
+ if client != actualcmds {
+ t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+}
+
+var basicServer = `250 mx.google.com at your service
+502 Unrecognized command.
+250-mx.google.com at your service
+250-SIZE 35651584
+250-AUTH LOGIN PLAIN
+250 8BITMIME
+530 Authentication required
+252 Send some mail, I'll try my best
+250 User is valid
+235 Accepted
+250 Sender OK
+250 Receiver OK
+354 Go ahead
+250 Data OK
+221 OK
+`
+
+var basicClient = `HELO localhost
+EHLO localhost
+EHLO localhost
+MAIL FROM:<user@gmail.com> BODY=8BITMIME
+VRFY user1@gmail.com
+VRFY user2@gmail.com
+AUTH PLAIN AHVzZXIAcGFzcw==
+MAIL FROM:<user@gmail.com> BODY=8BITMIME
+RCPT TO:<golang-nuts@googlegroups.com>
+DATA
+From: user@gmail.com
+To: golang-nuts@googlegroups.com
+Subject: Hooray for Go
+
+Line 1
+..Leading dot line .
+Goodbye.
+.
+QUIT
+`
+
+func TestNewClient(t *testing.T) {
+ server := strings.Join(strings.Split(newClientServer, "\n"), "\r\n")
+ client := strings.Join(strings.Split(newClientClient, "\n"), "\r\n")
+
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ out := func() string {
+ bcmdbuf.Flush()
+ return cmdbuf.String()
+ }
+ var fake faker
+ fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
+ c, err := NewClient(fake, "fake.host")
+ if err != nil {
+ t.Fatalf("NewClient: %v\n(after %v)", err, out())
+ }
+ defer c.Close()
+ if ok, args := c.Extension("aUtH"); !ok || args != "LOGIN PLAIN" {
+ t.Fatalf("Expected AUTH supported")
+ }
+ if ok, _ := c.Extension("DSN"); ok {
+ t.Fatalf("Shouldn't support DSN")
+ }
+ if err := c.Quit(); err != nil {
+ t.Fatalf("QUIT failed: %s", err)
+ }
+
+ actualcmds := out()
+ if client != actualcmds {
+ t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+}
+
+var newClientServer = `220 hello world
+250-mx.google.com at your service
+250-SIZE 35651584
+250-AUTH LOGIN PLAIN
+250 8BITMIME
+221 OK
+`
+
+var newClientClient = `EHLO localhost
+QUIT
+`
+
+func TestNewClient2(t *testing.T) {
+ server := strings.Join(strings.Split(newClient2Server, "\n"), "\r\n")
+ client := strings.Join(strings.Split(newClient2Client, "\n"), "\r\n")
+
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ var fake faker
+ fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
+ c, err := NewClient(fake, "fake.host")
+ if err != nil {
+ t.Fatalf("NewClient: %v", err)
+ }
+ defer c.Close()
+ if ok, _ := c.Extension("DSN"); ok {
+ t.Fatalf("Shouldn't support DSN")
+ }
+ if err := c.Quit(); err != nil {
+ t.Fatalf("QUIT failed: %s", err)
+ }
+
+ bcmdbuf.Flush()
+ actualcmds := cmdbuf.String()
+ if client != actualcmds {
+ t.Fatalf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+}
+
+var newClient2Server = `220 hello world
+502 EH?
+250-mx.google.com at your service
+250-SIZE 35651584
+250-AUTH LOGIN PLAIN
+250 8BITMIME
+221 OK
+`
+
+var newClient2Client = `EHLO localhost
+HELO localhost
+QUIT
+`
+
+func TestHello(t *testing.T) {
+
+ if len(helloServer) != len(helloClient) {
+ t.Fatalf("Hello server and client size mismatch")
+ }
+
+ for i := 0; i < len(helloServer); i++ {
+ server := strings.Join(strings.Split(baseHelloServer+helloServer[i], "\n"), "\r\n")
+ client := strings.Join(strings.Split(baseHelloClient+helloClient[i], "\n"), "\r\n")
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ var fake faker
+ fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
+ c, err := NewClient(fake, "fake.host")
+ if err != nil {
+ t.Fatalf("NewClient: %v", err)
+ }
+ defer c.Close()
+ c.localName = "customhost"
+ err = nil
+
+ switch i {
+ case 0:
+ err = c.Hello("customhost")
+ case 1:
+ err = c.StartTLS(nil)
+ if err.Error() == "502 Not implemented" {
+ err = nil
+ }
+ case 2:
+ err = c.Verify("test@example.com")
+ case 3:
+ c.tls = true
+ c.serverName = "smtp.google.com"
+ err = c.Auth(PlainAuth("", "user", "pass", "smtp.google.com"))
+ case 4:
+ err = c.Mail("test@example.com")
+ case 5:
+ ok, _ := c.Extension("feature")
+ if ok {
+ t.Errorf("Expected FEATURE not to be supported")
+ }
+ case 6:
+ err = c.Reset()
+ case 7:
+ err = c.Quit()
+ case 8:
+ err = c.Verify("test@example.com")
+ if err != nil {
+ err = c.Hello("customhost")
+ if err != nil {
+ t.Errorf("Want error, got none")
+ }
+ }
+ default:
+ t.Fatalf("Unhandled command")
+ }
+
+ if err != nil {
+ t.Errorf("Command %d failed: %v", i, err)
+ }
+
+ bcmdbuf.Flush()
+ actualcmds := cmdbuf.String()
+ if client != actualcmds {
+ t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+ }
+}
+
+var baseHelloServer = `220 hello world
+502 EH?
+250-mx.google.com at your service
+250 FEATURE
+`
+
+var helloServer = []string{
+ "",
+ "502 Not implemented\n",
+ "250 User is valid\n",
+ "235 Accepted\n",
+ "250 Sender ok\n",
+ "",
+ "250 Reset ok\n",
+ "221 Goodbye\n",
+ "250 Sender ok\n",
+}
+
+var baseHelloClient = `EHLO customhost
+HELO customhost
+`
+
+var helloClient = []string{
+ "",
+ "STARTTLS\n",
+ "VRFY test@example.com\n",
+ "AUTH PLAIN AHVzZXIAcGFzcw==\n",
+ "MAIL FROM:<test@example.com>\n",
+ "",
+ "RSET\n",
+ "QUIT\n",
+ "VRFY test@example.com\n",
+}
+
+func TestSendMail(t *testing.T) {
+ server := strings.Join(strings.Split(sendMailServer, "\n"), "\r\n")
+ client := strings.Join(strings.Split(sendMailClient, "\n"), "\r\n")
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ l, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ t.Fatalf("Unable to to create listener: %v", err)
+ }
+ defer l.Close()
+
+ // prevent data race on bcmdbuf
+ var done = make(chan struct{})
+ go func(data []string) {
+
+ defer close(done)
+
+ conn, err := l.Accept()
+ if err != nil {
+ t.Errorf("Accept error: %v", err)
+ return
+ }
+ defer conn.Close()
+
+ tc := textproto.NewConn(conn)
+ for i := 0; i < len(data) && data[i] != ""; i++ {
+ tc.PrintfLine(data[i])
+ for len(data[i]) >= 4 && data[i][3] == '-' {
+ i++
+ tc.PrintfLine(data[i])
+ }
+ if data[i] == "221 Goodbye" {
+ return
+ }
+ read := false
+ for !read || data[i] == "354 Go ahead" {
+ msg, err := tc.ReadLine()
+ bcmdbuf.Write([]byte(msg + "\r\n"))
+ read = true
+ if err != nil {
+ t.Errorf("Read error: %v", err)
+ return
+ }
+ if data[i] == "354 Go ahead" && msg == "." {
+ break
+ }
+ }
+ }
+ }(strings.Split(server, "\r\n"))
+
+ err = SendMail(l.Addr().String(), nil, "test@example.com", []string{"other@example.com"}, []byte(strings.Replace(`From: test@example.com
+To: other@example.com
+Subject: SendMail test
+
+SendMail is working for me.
+`, "\n", "\r\n", -1)))
+
+ if err != nil {
+ t.Errorf("%v", err)
+ }
+
+ <-done
+ bcmdbuf.Flush()
+ actualcmds := cmdbuf.String()
+ if client != actualcmds {
+ t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+}
+
+var sendMailServer = `220 hello world
+502 EH?
+250 mx.google.com at your service
+250 Sender ok
+250 Receiver ok
+354 Go ahead
+250 Data ok
+221 Goodbye
+`
+
+var sendMailClient = `EHLO localhost
+HELO localhost
+MAIL FROM:<test@example.com>
+RCPT TO:<other@example.com>
+DATA
+From: test@example.com
+To: other@example.com
+Subject: SendMail test
+
+SendMail is working for me.
+.
+QUIT
+`
+
+func TestAuthFailed(t *testing.T) {
+ server := strings.Join(strings.Split(authFailedServer, "\n"), "\r\n")
+ client := strings.Join(strings.Split(authFailedClient, "\n"), "\r\n")
+ var cmdbuf bytes.Buffer
+ bcmdbuf := bufio.NewWriter(&cmdbuf)
+ var fake faker
+ fake.ReadWriter = bufio.NewReadWriter(bufio.NewReader(strings.NewReader(server)), bcmdbuf)
+ c, err := NewClient(fake, "fake.host")
+ if err != nil {
+ t.Fatalf("NewClient: %v", err)
+ }
+ defer c.Close()
+
+ c.tls = true
+ c.serverName = "smtp.google.com"
+ err = c.Auth(PlainAuth("", "user", "pass", "smtp.google.com"))
+
+ if err == nil {
+ t.Error("Auth: expected error; got none")
+ } else if err.Error() != "535 Invalid credentials\nplease see www.example.com" {
+ t.Errorf("Auth: got error: %v, want: %s", err, "535 Invalid credentials\nplease see www.example.com")
+ }
+
+ bcmdbuf.Flush()
+ actualcmds := cmdbuf.String()
+ if client != actualcmds {
+ t.Errorf("Got:\n%s\nExpected:\n%s", actualcmds, client)
+ }
+}
+
+var authFailedServer = `220 hello world
+250-mx.google.com at your service
+250 AUTH LOGIN PLAIN
+535-Invalid credentials
+535 please see www.example.com
+221 Goodbye
+`
+
+var authFailedClient = `EHLO localhost
+AUTH PLAIN AHVzZXIAcGFzcw==
+*
+QUIT
+`
+
+func TestTLSClient(t *testing.T) {
+ ln := newLocalListener(t)
+ defer ln.Close()
+ errc := make(chan error)
+ go func() {
+ errc <- sendMail(ln.Addr().String())
+ }()
+ conn, err := ln.Accept()
+ if err != nil {
+ t.Fatalf("failed to accept connection: %v", err)
+ }
+ defer conn.Close()
+ if err := serverHandle(conn, t); err != nil {
+ t.Fatalf("failed to handle connection: %v", err)
+ }
+ if err := <-errc; err != nil {
+ t.Fatalf("client error: %v", err)
+ }
+}
+
+func newLocalListener(t *testing.T) net.Listener {
+ ln, err := net.Listen("tcp", "127.0.0.1:0")
+ if err != nil {
+ ln, err = net.Listen("tcp6", "[::1]:0")
+ }
+ if err != nil {
+ t.Fatal(err)
+ }
+ return ln
+}
+
+type smtpSender struct {
+ w io.Writer
+}
+
+func (s smtpSender) send(f string) {
+ s.w.Write([]byte(f + "\r\n"))
+}
+
+// smtp server, finely tailored to deal with our own client only!
+func serverHandle(c net.Conn, t *testing.T) error {
+ send := smtpSender{c}.send
+ send("220 127.0.0.1 ESMTP service ready")
+ s := bufio.NewScanner(c)
+ for s.Scan() {
+ switch s.Text() {
+ case "EHLO localhost":
+ send("250-127.0.0.1 ESMTP offers a warm hug of welcome")
+ send("250-STARTTLS")
+ send("250 Ok")
+ case "STARTTLS":
+ send("220 Go ahead")
+ keypair, err := tls.X509KeyPair(localhostCert, localhostKey)
+ if err != nil {
+ return err
+ }
+ config := &tls.Config{Certificates: []tls.Certificate{keypair}}
+ c = tls.Server(c, config)
+ defer c.Close()
+ return serverHandleTLS(c, t)
+ default:
+ t.Fatalf("unrecognized command: %q", s.Text())
+ }
+ }
+ return s.Err()
+}
+
+func serverHandleTLS(c net.Conn, t *testing.T) error {
+ send := smtpSender{c}.send
+ s := bufio.NewScanner(c)
+ for s.Scan() {
+ switch s.Text() {
+ case "EHLO localhost":
+ send("250 Ok")
+ case "MAIL FROM:<joe1@example.com>":
+ send("250 Ok")
+ case "RCPT TO:<joe2@example.com>":
+ send("250 Ok")
+ case "DATA":
+ send("354 send the mail data, end with .")
+ send("250 Ok")
+ case "Subject: test":
+ case "":
+ case "howdy!":
+ case ".":
+ case "QUIT":
+ send("221 127.0.0.1 Service closing transmission channel")
+ return nil
+ default:
+ t.Fatalf("unrecognized command during TLS: %q", s.Text())
+ }
+ }
+ return s.Err()
+}
+
+func init() {
+ testRootCAs := x509.NewCertPool()
+ testRootCAs.AppendCertsFromPEM(localhostCert)
+ testHookStartTLS = func(config *tls.Config) {
+ config.RootCAs = testRootCAs
+ }
+}
+
+func sendMail(hostPort string) error {
+ host, _, err := net.SplitHostPort(hostPort)
+ if err != nil {
+ return err
+ }
+ auth := PlainAuth("", "", "", host)
+ from := "joe1@example.com"
+ to := []string{"joe2@example.com"}
+ return SendMail(hostPort, auth, from, to, []byte("Subject: test\n\nhowdy!"))
+}
+
+// (copied from net/http/httptest)
+// localhostCert is a PEM-encoded TLS cert with SAN IPs
+// "127.0.0.1" and "[::1]", expiring at the last second of 2049 (the end
+// of ASN.1 time).
+// generated from src/crypto/tls:
+// go run generate_cert.go --rsa-bits 512 --host 127.0.0.1,::1,example.com --ca --start-date "Jan 1 00:00:00 1970" --duration=1000000h
+var localhostCert = []byte(`-----BEGIN CERTIFICATE-----
+MIIBdzCCASOgAwIBAgIBADALBgkqhkiG9w0BAQUwEjEQMA4GA1UEChMHQWNtZSBD
+bzAeFw03MDAxMDEwMDAwMDBaFw00OTEyMzEyMzU5NTlaMBIxEDAOBgNVBAoTB0Fj
+bWUgQ28wWjALBgkqhkiG9w0BAQEDSwAwSAJBAN55NcYKZeInyTuhcCwFMhDHCmwa
+IUSdtXdcbItRB/yfXGBhiex00IaLXQnSU+QZPRZWYqeTEbFSgihqi1PUDy8CAwEA
+AaNoMGYwDgYDVR0PAQH/BAQDAgCkMBMGA1UdJQQMMAoGCCsGAQUFBwMBMA8GA1Ud
+EwEB/wQFMAMBAf8wLgYDVR0RBCcwJYILZXhhbXBsZS5jb22HBH8AAAGHEAAAAAAA
+AAAAAAAAAAAAAAEwCwYJKoZIhvcNAQEFA0EAAoQn/ytgqpiLcZu9XKbCJsJcvkgk
+Se6AbGXgSlq+ZCEVo0qIwSgeBqmsJxUu7NCSOwVJLYNEBO2DtIxoYVk+MA==
+-----END CERTIFICATE-----`)
+
+// localhostKey is the private key for localhostCert.
+var localhostKey = []byte(`-----BEGIN RSA PRIVATE KEY-----
+MIIBPAIBAAJBAN55NcYKZeInyTuhcCwFMhDHCmwaIUSdtXdcbItRB/yfXGBhiex0
+0IaLXQnSU+QZPRZWYqeTEbFSgihqi1PUDy8CAwEAAQJBAQdUx66rfh8sYsgfdcvV
+NoafYpnEcB5s4m/vSVe6SU7dCK6eYec9f9wpT353ljhDUHq3EbmE4foNzJngh35d
+AekCIQDhRQG5Li0Wj8TM4obOnnXUXf1jRv0UkzE9AHWLG5q3AwIhAPzSjpYUDjVW
+MCUXgckTpKCuGwbJk7424Nb8bLzf3kllAiA5mUBgjfr/WtFSJdWcPQ4Zt9KTMNKD
+EUO0ukpTwEIl6wIhAMbGqZK3zAAFdq8DD2jPx+UJXnh0rnOkZBzDtJ6/iN69AiEA
+1Aq8MJgTaYsDQWyU/hDq5YkDJc9e9DSCvUIzqxQWMQE=
+-----END RSA PRIVATE KEY-----`)
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