From dc00dc6c6bf3b5554e37f60799aec092276ff807 Mon Sep 17 00:00:00 2001 From: Filippo Valsorda Date: Mon, 7 Jun 2021 08:24:22 -0400 Subject: crypto/tls: let HTTP/1.1 clients connect to servers with NextProtos "h2" Fixes #46310 Change-Id: Idd5e30f05c439f736ae6f3904cbb9cc2ba772315 Reviewed-on: https://go-review.googlesource.com/c/go/+/325432 Trust: Filippo Valsorda Run-TryBot: Filippo Valsorda TryBot-Result: Go Bot Reviewed-by: Roland Shoemaker --- src/crypto/tls/handshake_client.go | 44 +++++---- src/crypto/tls/handshake_client_tls13.go | 14 +-- src/crypto/tls/handshake_server.go | 42 +++++++-- src/crypto/tls/handshake_server_test.go | 21 +++++ src/crypto/tls/handshake_server_tls13.go | 15 ++-- .../tls/testdata/Server-TLSv12-ALPN-Fallback | 91 +++++++++++++++++++ .../tls/testdata/Server-TLSv13-ALPN-Fallback | 100 +++++++++++++++++++++ 7 files changed, 277 insertions(+), 50 deletions(-) create mode 100644 src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback create mode 100644 src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback diff --git a/src/crypto/tls/handshake_client.go b/src/crypto/tls/handshake_client.go index 13a7f3442c..4af3d998a3 100644 --- a/src/crypto/tls/handshake_client.go +++ b/src/crypto/tls/handshake_client.go @@ -711,17 +711,11 @@ func (hs *clientHandshakeState) processServerHello() (bool, error) { } } - if hs.serverHello.alpnProtocol != "" { - if len(hs.hello.alpnProtocols) == 0 { - c.sendAlert(alertUnsupportedExtension) - return false, errors.New("tls: server advertised unrequested ALPN extension") - } - if mutualProtocol([]string{hs.serverHello.alpnProtocol}, hs.hello.alpnProtocols) == "" { - c.sendAlert(alertUnsupportedExtension) - return false, errors.New("tls: server selected unadvertised ALPN protocol") - } - c.clientProtocol = hs.serverHello.alpnProtocol + if err := checkALPN(hs.hello.alpnProtocols, hs.serverHello.alpnProtocol); err != nil { + c.sendAlert(alertUnsupportedExtension) + return false, err } + c.clientProtocol = hs.serverHello.alpnProtocol c.scts = hs.serverHello.scts @@ -753,6 +747,23 @@ func (hs *clientHandshakeState) processServerHello() (bool, error) { return true, nil } +// checkALPN ensure that the server's choice of ALPN protocol is compatible with +// the protocols that we advertised in the Client Hello. +func checkALPN(clientProtos []string, serverProto string) error { + if serverProto == "" { + return nil + } + if len(clientProtos) == 0 { + return errors.New("tls: server advertised unrequested ALPN extension") + } + for _, proto := range clientProtos { + if proto == serverProto { + return nil + } + } + return errors.New("tls: server selected unadvertised ALPN protocol") +} + func (hs *clientHandshakeState) readFinished(out []byte) error { c := hs.c @@ -979,19 +990,6 @@ func clientSessionCacheKey(serverAddr net.Addr, config *Config) string { return serverAddr.String() } -// mutualProtocol finds the mutual ALPN protocol given list of possible -// protocols and a list of the preference order. -func mutualProtocol(protos, preferenceProtos []string) string { - for _, s := range preferenceProtos { - for _, c := range protos { - if s == c { - return s - } - } - } - return "" -} - // hostnameInSNI converts name into an appropriate hostname for SNI. // Literal IP addresses and absolute FQDNs are not permitted as SNI values. // See RFC 6066, Section 3. diff --git a/src/crypto/tls/handshake_client_tls13.go b/src/crypto/tls/handshake_client_tls13.go index be37c681c6..eb59ac90d1 100644 --- a/src/crypto/tls/handshake_client_tls13.go +++ b/src/crypto/tls/handshake_client_tls13.go @@ -396,17 +396,11 @@ func (hs *clientHandshakeStateTLS13) readServerParameters() error { } hs.transcript.Write(encryptedExtensions.marshal()) - if encryptedExtensions.alpnProtocol != "" { - if len(hs.hello.alpnProtocols) == 0 { - c.sendAlert(alertUnsupportedExtension) - return errors.New("tls: server advertised unrequested ALPN extension") - } - if mutualProtocol([]string{encryptedExtensions.alpnProtocol}, hs.hello.alpnProtocols) == "" { - c.sendAlert(alertUnsupportedExtension) - return errors.New("tls: server selected unadvertised ALPN protocol") - } - c.clientProtocol = encryptedExtensions.alpnProtocol + if err := checkALPN(hs.hello.alpnProtocols, encryptedExtensions.alpnProtocol); err != nil { + c.sendAlert(alertUnsupportedExtension) + return err } + c.clientProtocol = encryptedExtensions.alpnProtocol return nil } diff --git a/src/crypto/tls/handshake_server.go b/src/crypto/tls/handshake_server.go index b231981e09..43f30e2fef 100644 --- a/src/crypto/tls/handshake_server.go +++ b/src/crypto/tls/handshake_server.go @@ -217,15 +217,13 @@ func (hs *serverHandshakeState) processClientHello() error { c.serverName = hs.clientHello.serverName } - if len(c.config.NextProtos) > 0 && len(hs.clientHello.alpnProtocols) > 0 { - selectedProto := mutualProtocol(hs.clientHello.alpnProtocols, c.config.NextProtos) - if selectedProto == "" { - c.sendAlert(alertNoApplicationProtocol) - return fmt.Errorf("tls: client requested unsupported application protocols (%s)", hs.clientHello.alpnProtocols) - } - hs.hello.alpnProtocol = selectedProto - c.clientProtocol = selectedProto + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err } + hs.hello.alpnProtocol = selectedProto + c.clientProtocol = selectedProto hs.cert, err = c.config.getCertificate(clientHelloInfo(hs.ctx, c, hs.clientHello)) if err != nil { @@ -277,6 +275,34 @@ func (hs *serverHandshakeState) processClientHello() error { return nil } +// negotiateALPN picks a shared ALPN protocol that both sides support in server +// preference order. If ALPN is not configured or the peer doesn't support it, +// it returns "" and no error. +func negotiateALPN(serverProtos, clientProtos []string) (string, error) { + if len(serverProtos) == 0 || len(clientProtos) == 0 { + return "", nil + } + var http11fallback bool + for _, s := range serverProtos { + for _, c := range clientProtos { + if s == c { + return s, nil + } + if s == "h2" && c == "http/1.1" { + http11fallback = true + } + } + } + // As a special case, let http/1.1 clients connect to h2 servers as if they + // didn't support ALPN. We used not to enforce protocol overlap, so over + // time a number of HTTP servers were configured with only "h2", but + // expected to accept connections from "http/1.1" clients. See Issue 46310. + if http11fallback { + return "", nil + } + return "", fmt.Errorf("tls: client requested unsupported application protocols (%s)", clientProtos) +} + // supportsECDHE returns whether ECDHE key exchanges can be used with this // pre-TLS 1.3 client. func supportsECDHE(c *Config, supportedCurves []CurveID, supportedPoints []uint8) bool { diff --git a/src/crypto/tls/handshake_server_test.go b/src/crypto/tls/handshake_server_test.go index 4483838045..f61b4c88ef 100644 --- a/src/crypto/tls/handshake_server_test.go +++ b/src/crypto/tls/handshake_server_test.go @@ -949,6 +949,27 @@ func TestHandshakeServerALPNNotConfigured(t *testing.T) { runServerTestTLS13(t, test) } +func TestHandshakeServerALPNFallback(t *testing.T) { + config := testConfig.Clone() + config.NextProtos = []string{"proto1", "h2", "proto2"} + + test := &serverTest{ + name: "ALPN-Fallback", + // Note that this needs OpenSSL 1.0.2 because that is the first + // version that supports the -alpn flag. + command: []string{"openssl", "s_client", "-alpn", "proto3,http/1.1,proto4", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"}, + config: config, + validate: func(state ConnectionState) error { + if state.NegotiatedProtocol != "" { + return fmt.Errorf("Got protocol %q, wanted nothing", state.NegotiatedProtocol) + } + return nil + }, + } + runServerTestTLS12(t, test) + runServerTestTLS13(t, test) +} + // TestHandshakeServerSNI involves a client sending an SNI extension of // "snitest.com", which happens to match the CN of testSNICertificate. The test // verifies that the server correctly selects that certificate. diff --git a/src/crypto/tls/handshake_server_tls13.go b/src/crypto/tls/handshake_server_tls13.go index c375ec4246..08251b84de 100644 --- a/src/crypto/tls/handshake_server_tls13.go +++ b/src/crypto/tls/handshake_server_tls13.go @@ -11,7 +11,6 @@ import ( "crypto/hmac" "crypto/rsa" "errors" - "fmt" "hash" "io" "sync/atomic" @@ -551,15 +550,13 @@ func (hs *serverHandshakeStateTLS13) sendServerParameters() error { encryptedExtensions := new(encryptedExtensionsMsg) - if len(c.config.NextProtos) > 0 && len(hs.clientHello.alpnProtocols) > 0 { - selectedProto := mutualProtocol(hs.clientHello.alpnProtocols, c.config.NextProtos) - if selectedProto == "" { - c.sendAlert(alertNoApplicationProtocol) - return fmt.Errorf("tls: client requested unsupported application protocols (%s)", hs.clientHello.alpnProtocols) - } - encryptedExtensions.alpnProtocol = selectedProto - c.clientProtocol = selectedProto + selectedProto, err := negotiateALPN(c.config.NextProtos, hs.clientHello.alpnProtocols) + if err != nil { + c.sendAlert(alertNoApplicationProtocol) + return err } + encryptedExtensions.alpnProtocol = selectedProto + c.clientProtocol = selectedProto hs.transcript.Write(encryptedExtensions.marshal()) if _, err := c.writeRecord(recordTypeHandshake, encryptedExtensions.marshal()); err != nil { diff --git a/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback b/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback new file mode 100644 index 0000000000..4fadf39062 --- /dev/null +++ b/src/crypto/tls/testdata/Server-TLSv12-ALPN-Fallback @@ -0,0 +1,91 @@ +>>> Flow 1 (client to server) +00000000 16 03 01 00 a6 01 00 00 a2 03 03 b5 c9 ab 32 7f |..............2.| +00000010 e1 af 3f f2 ac 2a 11 dd 33 f9 b5 21 88 0d e4 29 |..?..*..3..!...)| +00000020 e2 47 49 dc c7 31 a8 a5 25 81 0c 00 00 04 cc a8 |.GI..1..%.......| +00000030 00 ff 01 00 00 75 00 0b 00 04 03 00 01 02 00 0a |.....u..........| +00000040 00 0c 00 0a 00 1d 00 17 00 1e 00 19 00 18 00 23 |...............#| +00000050 00 00 00 10 00 19 00 17 06 70 72 6f 74 6f 33 08 |.........proto3.| +00000060 68 74 74 70 2f 31 2e 31 06 70 72 6f 74 6f 34 00 |http/1.1.proto4.| +00000070 16 00 00 00 17 00 00 00 0d 00 30 00 2e 04 03 05 |..........0.....| +00000080 03 06 03 08 07 08 08 08 09 08 0a 08 0b 08 04 08 |................| +00000090 05 08 06 04 01 05 01 06 01 03 03 02 03 03 01 02 |................| +000000a0 01 03 02 02 02 04 02 05 02 06 02 |...........| +>>> Flow 2 (server to client) +00000000 16 03 03 00 3b 02 00 00 37 03 03 00 00 00 00 00 |....;...7.......| +00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| +00000020 00 00 00 44 4f 57 4e 47 52 44 01 00 cc a8 00 00 |...DOWNGRD......| +00000030 0f 00 23 00 00 ff 01 00 01 00 00 0b 00 02 01 00 |..#.............| +00000040 16 03 03 02 59 0b 00 02 55 00 02 52 00 02 4f 30 |....Y...U..R..O0| +00000050 82 02 4b 30 82 01 b4 a0 03 02 01 02 02 09 00 e8 |..K0............| +00000060 f0 9d 3f e2 5b ea a6 30 0d 06 09 2a 86 48 86 f7 |..?.[..0...*.H..| +00000070 0d 01 01 0b 05 00 30 1f 31 0b 30 09 06 03 55 04 |......0.1.0...U.| +00000080 0a 13 02 47 6f 31 10 30 0e 06 03 55 04 03 13 07 |...Go1.0...U....| +00000090 47 6f 20 52 6f 6f 74 30 1e 17 0d 31 36 30 31 30 |Go Root0...16010| +000000a0 31 30 30 30 30 30 30 5a 17 0d 32 35 30 31 30 31 |1000000Z..250101| +000000b0 30 30 30 30 30 30 5a 30 1a 31 0b 30 09 06 03 55 |000000Z0.1.0...U| +000000c0 04 0a 13 02 47 6f 31 0b 30 09 06 03 55 04 03 13 |....Go1.0...U...| +000000d0 02 47 6f 30 81 9f 30 0d 06 09 2a 86 48 86 f7 0d |.Go0..0...*.H...| +000000e0 01 01 01 05 00 03 81 8d 00 30 81 89 02 81 81 00 |.........0......| +000000f0 db 46 7d 93 2e 12 27 06 48 bc 06 28 21 ab 7e c4 |.F}...'.H..(!.~.| +00000100 b6 a2 5d fe 1e 52 45 88 7a 36 47 a5 08 0d 92 42 |..]..RE.z6G....B| +00000110 5b c2 81 c0 be 97 79 98 40 fb 4f 6d 14 fd 2b 13 |[.....y.@.Om..+.| +00000120 8b c2 a5 2e 67 d8 d4 09 9e d6 22 38 b7 4a 0b 74 |....g....."8.J.t| +00000130 73 2b c2 34 f1 d1 93 e5 96 d9 74 7b f3 58 9f 6c |s+.4......t{.X.l| +00000140 61 3c c0 b0 41 d4 d9 2b 2b 24 23 77 5b 1c 3b bd |a<..A..++$#w[.;.| +00000150 75 5d ce 20 54 cf a1 63 87 1d 1e 24 c4 f3 1d 1a |u]. T..c...$....| +00000160 50 8b aa b6 14 43 ed 97 a7 75 62 f4 14 c8 52 d7 |P....C...ub...R.| +00000170 02 03 01 00 01 a3 81 93 30 81 90 30 0e 06 03 55 |........0..0...U| +00000180 1d 0f 01 01 ff 04 04 03 02 05 a0 30 1d 06 03 55 |...........0...U| +00000190 1d 25 04 16 30 14 06 08 2b 06 01 05 05 07 03 01 |.%..0...+.......| +000001a0 06 08 2b 06 01 05 05 07 03 02 30 0c 06 03 55 1d |..+.......0...U.| +000001b0 13 01 01 ff 04 02 30 00 30 19 06 03 55 1d 0e 04 |......0.0...U...| +000001c0 12 04 10 9f 91 16 1f 43 43 3e 49 a6 de 6d b6 80 |.......CC>I..m..| +000001d0 d7 9f 60 30 1b 06 03 55 1d 23 04 14 30 12 80 10 |..`0...U.#..0...| +000001e0 48 13 49 4d 13 7e 16 31 bb a3 01 d5 ac ab 6e 7b |H.IM.~.1......n{| +000001f0 30 19 06 03 55 1d 11 04 12 30 10 82 0e 65 78 61 |0...U....0...exa| +00000200 6d 70 6c 65 2e 67 6f 6c 61 6e 67 30 0d 06 09 2a |mple.golang0...*| +00000210 86 48 86 f7 0d 01 01 0b 05 00 03 81 81 00 9d 30 |.H.............0| +00000220 cc 40 2b 5b 50 a0 61 cb ba e5 53 58 e1 ed 83 28 |.@+[P.a...SX...(| +00000230 a9 58 1a a9 38 a4 95 a1 ac 31 5a 1a 84 66 3d 43 |.X..8....1Z..f=C| +00000240 d3 2d d9 0b f2 97 df d3 20 64 38 92 24 3a 00 bc |.-...... d8.$:..| +00000250 cf 9c 7d b7 40 20 01 5f aa d3 16 61 09 a2 76 fd |..}.@ ._...a..v.| +00000260 13 c3 cc e1 0c 5c ee b1 87 82 f1 6c 04 ed 73 bb |.....\.....l..s.| +00000270 b3 43 77 8d 0c 1c f1 0f a1 d8 40 83 61 c9 4c 72 |.Cw.......@.a.Lr| +00000280 2b 9d ae db 46 06 06 4d f4 c1 b3 3e c0 d1 bd 42 |+...F..M...>...B| +00000290 d4 db fe 3d 13 60 84 5c 21 d3 3b e9 fa e7 16 03 |...=.`.\!.;.....| +000002a0 03 00 ac 0c 00 00 a8 03 00 1d 20 2f e5 7d a3 47 |.......... /.}.G| +000002b0 cd 62 43 15 28 da ac 5f bb 29 07 30 ff f6 84 af |.bC.(.._.).0....| +000002c0 c4 cf c2 ed 90 99 5f 58 cb 3b 74 08 04 00 80 5f |......_X.;t...._| +000002d0 37 27 84 58 1e ea 1e 40 1b de a9 8f 04 d4 94 64 |7'.X...@.......d| +000002e0 4e 27 c7 f1 b3 30 d0 53 f5 3d 57 50 d2 17 97 c8 |N'...0.S.=WP....| +000002f0 3d 61 af a6 21 ab 1c 34 47 70 f8 b1 3b 9c 06 86 |=a..!..4Gp..;...| +00000300 87 00 e2 13 50 83 91 ad bc 84 bd b4 7b f3 4b ed |....P.......{.K.| +00000310 ca 81 0c 94 37 a8 ec 67 ca 9c f3 00 f6 af c2 92 |....7..g........| +00000320 c4 8c 78 07 18 0e 43 24 1b 98 16 50 5c 2b 75 0e |..x...C$...P\+u.| +00000330 40 66 dc 40 cd 10 1a 51 25 f3 96 25 1a 3e 70 af |@f.@...Q%..%.>p.| +00000340 16 24 d0 1c 0e 33 f9 c1 74 cf b7 e2 28 ac 60 16 |.$...3..t...(.`.| +00000350 03 03 00 04 0e 00 00 00 |........| +>>> Flow 3 (client to server) +00000000 16 03 03 00 25 10 00 00 21 20 30 f2 bb f7 a7 ac |....%...! 0.....| +00000010 23 20 22 ee 73 0d 49 9c b3 7b c1 9a db 2c 85 f3 |# ".s.I..{...,..| +00000020 c0 82 31 60 bd 8b 14 4e 73 43 14 03 03 00 01 01 |..1`...NsC......| +00000030 16 03 03 00 20 09 8d c7 86 ee cc f4 c7 36 a3 49 |.... ........6.I| +00000040 d3 f7 a1 4a 68 a2 1e b4 fc cc a2 15 cb 01 92 d8 |...Jh...........| +00000050 72 b0 d1 6f eb |r..o.| +>>> Flow 4 (server to client) +00000000 16 03 03 00 8b 04 00 00 87 00 00 00 00 00 81 50 |...............P| +00000010 46 ad c1 db a8 38 86 7b 2b bb fd d0 c3 42 3e 00 |F....8.{+....B>.| +00000020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 94 |................| +00000030 6f e0 18 83 51 ed 14 ef 68 ca 42 c5 4c a2 ac 05 |o...Q...h.B.L...| +00000040 9c 69 69 99 08 9f de a4 d4 e7 37 ab 14 38 4c 47 |.ii.......7..8LG| +00000050 70 f0 97 1d db 2d 0a 14 c2 1e f0 16 9f 6d 37 02 |p....-.......m7.| +00000060 4b f1 16 be 98 3f df 74 83 7c 19 85 61 49 38 16 |K....?.t.|..aI8.| +00000070 ee 35 7a e2 3f 74 fe 8d e3 07 93 a1 5e fa f2 02 |.5z.?t......^...| +00000080 e5 c8 60 3f 11 83 8b 0e 32 52 f1 aa 52 b7 0a 89 |..`?....2R..R...| +00000090 14 03 03 00 01 01 16 03 03 00 20 9e 65 15 cf 45 |.......... .e..E| +000000a0 a5 03 69 c9 b1 d8 9e 92 a3 a2 b0 df 2e 62 b1 3a |..i..........b.:| +000000b0 17 78 cd e5 1d f3 51 42 7e 4e 25 17 03 03 00 1d |.x....QB~N%.....| +000000c0 d9 ae d0 fa b7 90 a9 2f 28 8d 1d 6f 54 1f c0 1e |......./(..oT...| +000000d0 4d ae b6 91 f0 e8 84 cf 86 11 22 25 ea 15 03 03 |M........."%....| +000000e0 00 12 0e 71 f2 11 9e 9f 58 ad c0 d8 fc fa 34 bc |...q....X.....4.| +000000f0 02 5a 60 00 |.Z`.| diff --git a/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback b/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback new file mode 100644 index 0000000000..6203e6877c --- /dev/null +++ b/src/crypto/tls/testdata/Server-TLSv13-ALPN-Fallback @@ -0,0 +1,100 @@ +>>> Flow 1 (client to server) +00000000 16 03 01 00 eb 01 00 00 e7 03 03 1c d3 8e 3b d9 |..............;.| +00000010 fe 7d e7 f9 9f fa c6 51 c3 8c 1b dd dc 87 95 f4 |.}.....Q........| +00000020 39 23 67 e4 d6 bd 94 93 fc 88 4e 20 c3 c0 e2 c1 |9#g.......N ....| +00000030 3d 12 ec 4c 0a 3f 40 51 13 24 61 11 c0 5d 09 f9 |=..L.?@Q.$a..]..| +00000040 08 d6 3e cd e7 b3 51 c3 06 8f b4 42 00 04 13 03 |..>...Q....B....| +00000050 00 ff 01 00 00 9a 00 0b 00 04 03 00 01 02 00 0a |................| +00000060 00 0c 00 0a 00 1d 00 17 00 1e 00 19 00 18 00 23 |...............#| +00000070 00 00 00 10 00 19 00 17 06 70 72 6f 74 6f 33 08 |.........proto3.| +00000080 68 74 74 70 2f 31 2e 31 06 70 72 6f 74 6f 34 00 |http/1.1.proto4.| +00000090 16 00 00 00 17 00 00 00 0d 00 1e 00 1c 04 03 05 |................| +000000a0 03 06 03 08 07 08 08 08 09 08 0a 08 0b 08 04 08 |................| +000000b0 05 08 06 04 01 05 01 06 01 00 2b 00 03 02 03 04 |..........+.....| +000000c0 00 2d 00 02 01 01 00 33 00 26 00 24 00 1d 00 20 |.-.....3.&.$... | +000000d0 f4 05 eb 4a 7a 73 20 18 74 aa 14 2a 0c 35 63 29 |...Jzs .t..*.5c)| +000000e0 cb f2 ad d1 a2 3d bd 9d 02 b4 62 00 bc eb 10 58 |.....=....b....X| +>>> Flow 2 (server to client) +00000000 16 03 03 00 7a 02 00 00 76 03 03 00 00 00 00 00 |....z...v.......| +00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| +00000020 00 00 00 00 00 00 00 00 00 00 00 20 c3 c0 e2 c1 |........... ....| +00000030 3d 12 ec 4c 0a 3f 40 51 13 24 61 11 c0 5d 09 f9 |=..L.?@Q.$a..]..| +00000040 08 d6 3e cd e7 b3 51 c3 06 8f b4 42 13 03 00 00 |..>...Q....B....| +00000050 2e 00 2b 00 02 03 04 00 33 00 24 00 1d 00 20 2f |..+.....3.$... /| +00000060 e5 7d a3 47 cd 62 43 15 28 da ac 5f bb 29 07 30 |.}.G.bC.(.._.).0| +00000070 ff f6 84 af c4 cf c2 ed 90 99 5f 58 cb 3b 74 14 |.........._X.;t.| +00000080 03 03 00 01 01 17 03 03 00 17 fb 75 d8 5c 50 35 |...........u.\P5| +00000090 55 82 ba 65 1e 63 73 b8 c1 e9 d7 f5 28 68 3c c1 |U..e.cs.....(h<.| +000000a0 5d 17 03 03 02 6d 56 c9 a9 09 73 6a bc fd 1a 3c |]....mV...sj...<| +000000b0 6a f8 3e 32 99 83 e8 f6 01 9e 5e 30 e8 53 7f 72 |j.>2......^0.S.r| +000000c0 fd 86 72 a8 9e 47 25 67 c1 f1 9a 03 c0 9d 6f 9d |..r..G%g......o.| +000000d0 bd ed 29 30 8f 3c 01 ce 49 bb 5f dd 58 9a ae 80 |..)0.<..I._.X...| +000000e0 5c 2d 81 fc ea 7b 03 03 3d 5d bb 92 23 73 67 89 |\-...{..=]..#sg.| +000000f0 2e f0 ec 08 20 8a 36 eb 43 a6 a1 68 d0 39 95 37 |.... .6.C..h.9.7| +00000100 6b 15 a9 0e 46 20 92 51 9c 04 bf 3b 07 97 84 cb |k...F .Q...;....| +00000110 1f 30 38 37 2e ff e7 0f f5 14 93 5a 84 f1 f7 10 |.087.......Z....| +00000120 c2 a5 0d bb 97 96 ef 4a e0 13 c0 63 72 2b 60 f3 |.......J...cr+`.| +00000130 59 b5 57 aa 5f d1 da a9 0e dd 9c dd c2 cb 61 fe |Y.W._.........a.| +00000140 e2 69 8e db 5d 70 6c 3a 33 e0 9e db 9a 31 26 6a |.i..]pl:3....1&j| +00000150 2b 9e 19 8e bb 5d 06 48 ea c0 a1 c6 11 24 fb c4 |+....].H.....$..| +00000160 ce ae 48 54 64 81 d1 84 38 a6 e0 7a 7b 74 2b bc |..HTd...8..z{t+.| +00000170 ce 07 8b b6 04 1f 5b 4c 36 29 68 0c 8c c7 32 15 |......[L6)h...2.| +00000180 93 e0 10 52 c2 27 23 96 c5 0c 9c e9 e2 a9 08 7d |...R.'#........}| +00000190 25 68 65 f5 4e 44 eb a9 85 78 13 e1 0d 86 5e dc |%he.ND...x....^.| +000001a0 fd e5 c6 dd 65 46 8e 2f 32 82 83 0b dd 67 f8 42 |....eF./2....g.B| +000001b0 65 87 3b 08 fe b1 f5 12 e9 74 21 04 12 6d 75 35 |e.;......t!..mu5| +000001c0 b2 eb 93 95 72 10 fa 56 96 77 c3 0c 17 8c 9e f6 |....r..V.w......| +000001d0 77 19 28 37 96 3e 73 98 f4 d2 91 4f 40 db 76 56 |w.(7.>s....O@.vV| +000001e0 ce b5 a8 7a b8 86 d0 9a ba b5 8b 40 c2 63 e1 cf |...z.......@.c..| +000001f0 49 29 2c 5d 1a 9b 8b 56 cb 93 ca 2c c0 d0 15 b7 |I),]...V...,....| +00000200 8a f1 6a d5 0a a8 81 57 b1 6e 10 cd a5 ff b1 4d |..j....W.n.....M| +00000210 47 c6 9b 35 f1 5f 83 91 22 f6 88 68 65 b3 b9 c9 |G..5._.."..he...| +00000220 02 dc 4b f7 13 39 06 e6 3a ec 94 ef 51 15 05 72 |..K..9..:...Q..r| +00000230 1d f4 9d 3b da ca 8d 2c 64 be 9b 45 99 2c 63 cc |...;...,d..E.,c.| +00000240 22 b3 8b 93 ad f6 2c f0 d2 d9 11 3f 5b c0 40 fa |".....,....?[.@.| +00000250 90 6e a0 76 b2 43 b9 4c 72 c4 24 28 a2 bf 56 d6 |.n.v.C.Lr.$(..V.| +00000260 d2 a7 2a d1 8c 5e 1d eb f8 be d0 43 da 7a c7 88 |..*..^.....C.z..| +00000270 61 67 a2 69 85 23 43 3e d4 88 f2 33 c3 5b 38 0a |ag.i.#C>...3.[8.| +00000280 1e de 28 3b 3b 19 de 95 2f 84 c0 37 88 80 59 2f |..(;;.../..7..Y/| +00000290 a6 ee 93 1a 69 08 c3 df 7c cf da c3 9b 96 70 d9 |....i...|.....p.| +000002a0 60 c5 e9 0f 42 f6 1a f2 58 5e f2 32 61 6a b2 a3 |`...B...X^.2aj..| +000002b0 1f 97 fa 08 6c 3f 4b 83 1f 04 66 80 8a 26 3a 7f |....l?K...f..&:.| +000002c0 24 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e3 f7 93 fc fa d7 20 af d5 f7 b4 0e 09 ad d5 |....... ........| +00000470 26 87 b8 6c e2 20 95 fb c0 70 3e 38 be b7 b1 9f |&..l. ...p>8....| +00000480 70 da c1 |p..| +>>> Flow 3 (client to server) +00000000 14 03 03 00 01 01 17 03 03 00 35 29 d2 b9 bb 9b |..........5)....| +00000010 de 6c 5d 22 23 c1 fe 99 4c c5 33 bf fd 70 36 6b |.l]"#...L.3..p6k| +00000020 f1 a5 92 e8 bf 7c 3d 6e ef 6a 44 73 bc cb 27 1c |.....|=n.jDs..'.| +00000030 09 5d bf 99 4c 19 24 c3 3b 30 91 b5 e3 b6 63 45 |.]..L.$.;0....cE| +>>> Flow 4 (server to client) +00000000 17 03 03 00 1e 52 55 85 7c b8 87 dd c7 b2 d9 5b |.....RU.|......[| +00000010 18 1d bb ac bf b6 ab 76 82 be 64 0e b2 7b 2c 0f |.......v..d..{,.| +00000020 aa 17 92 17 03 03 00 13 79 0a 60 b1 46 20 33 74 |........y.`.F 3t| +00000030 ed 12 a0 23 de 68 88 fc 6f dd 8e |...#.h..o..| -- cgit v1.2.3-54-g00ecf