Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 1 | // Copyright 2009 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | package tls |
| 6 | |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 7 | import ( |
Joel Sing | 7b7dac5 | 2013-07-17 12:33:16 -0400 | [diff] [blame] | 8 | "crypto" |
| 9 | "crypto/ecdsa" |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 10 | "crypto/ed25519" |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 11 | "crypto/rsa" |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 12 | "crypto/subtle" |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 13 | "crypto/x509" |
Russ Cox | c2049d2 | 2011-11-01 22:04:37 -0400 | [diff] [blame] | 14 | "errors" |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 15 | "fmt" |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 16 | "io" |
Minaev Mike | e5b1340 | 2018-01-26 09:17:46 +0000 | [diff] [blame] | 17 | "sync/atomic" |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 18 | ) |
| 19 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 20 | // serverHandshakeState contains details of a server handshake in progress. |
| 21 | // It's discarded once the handshake has completed. |
| 22 | type serverHandshakeState struct { |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 23 | c *Conn |
| 24 | clientHello *clientHelloMsg |
| 25 | hello *serverHelloMsg |
| 26 | suite *cipherSuite |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 27 | ecdhOk bool |
| 28 | ecSignOk bool |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 29 | rsaDecryptOk bool |
| 30 | rsaSignOk bool |
| 31 | sessionState *sessionState |
| 32 | finishedHash finishedHash |
| 33 | masterSecret []byte |
| 34 | cert *Certificate |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | // serverHandshake performs a TLS handshake as a server. |
Russ Cox | c2049d2 | 2011-11-01 22:04:37 -0400 | [diff] [blame] | 38 | func (c *Conn) serverHandshake() error { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 39 | // If this is the first server handshake, we generate a random key to |
| 40 | // encrypt the tickets with. |
Adam Langley | 46f4bfb | 2017-04-28 13:37:52 -0700 | [diff] [blame] | 41 | c.config.serverInitOnce.Do(func() { c.config.serverInit(nil) }) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 42 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 43 | clientHello, err := c.readClientHello() |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 44 | if err != nil { |
| 45 | return err |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 46 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 47 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 48 | if c.vers == VersionTLS13 { |
| 49 | hs := serverHandshakeStateTLS13{ |
| 50 | c: c, |
| 51 | clientHello: clientHello, |
| 52 | } |
| 53 | return hs.handshake() |
| 54 | } |
| 55 | |
| 56 | hs := serverHandshakeState{ |
| 57 | c: c, |
| 58 | clientHello: clientHello, |
| 59 | } |
| 60 | return hs.handshake() |
| 61 | } |
| 62 | |
| 63 | func (hs *serverHandshakeState) handshake() error { |
| 64 | c := hs.c |
| 65 | |
| 66 | if err := hs.processClientHello(); err != nil { |
| 67 | return err |
| 68 | } |
| 69 | |
Filippo Valsorda | ee76992 | 2018-10-12 17:07:04 -0400 | [diff] [blame] | 70 | // For an overview of TLS handshaking, see RFC 5246, Section 7.3. |
Adam Langley | 2a8c81f | 2016-06-01 14:41:09 -0700 | [diff] [blame] | 71 | c.buffering = true |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 72 | if hs.checkForResumption() { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 73 | // The client has included a session ticket and so we do an abbreviated handshake. |
| 74 | if err := hs.doResumeHandshake(); err != nil { |
| 75 | return err |
| 76 | } |
| 77 | if err := hs.establishKeys(); err != nil { |
| 78 | return err |
| 79 | } |
Jonathan Rudenberg | bff1417 | 2015-04-17 21:32:11 -0400 | [diff] [blame] | 80 | // ticketSupported is set in a resumption handshake if the |
| 81 | // ticket from the client was encrypted with an old session |
| 82 | // ticket key and thus a refreshed ticket should be sent. |
| 83 | if hs.hello.ticketSupported { |
| 84 | if err := hs.sendSessionTicket(); err != nil { |
| 85 | return err |
| 86 | } |
| 87 | } |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 88 | if err := hs.sendFinished(c.serverFinished[:]); err != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 89 | return err |
| 90 | } |
Adam Langley | 2a8c81f | 2016-06-01 14:41:09 -0700 | [diff] [blame] | 91 | if _, err := c.flush(); err != nil { |
| 92 | return err |
| 93 | } |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 94 | c.clientFinishedIsFirst = false |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 95 | if err := hs.readFinished(nil); err != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 96 | return err |
| 97 | } |
| 98 | c.didResume = true |
| 99 | } else { |
| 100 | // The client didn't include a session ticket, or it wasn't |
| 101 | // valid so we do a full handshake. |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 102 | if err := hs.pickCipherSuite(); err != nil { |
| 103 | return err |
| 104 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 105 | if err := hs.doFullHandshake(); err != nil { |
| 106 | return err |
| 107 | } |
| 108 | if err := hs.establishKeys(); err != nil { |
| 109 | return err |
| 110 | } |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 111 | if err := hs.readFinished(c.clientFinished[:]); err != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 112 | return err |
| 113 | } |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 114 | c.clientFinishedIsFirst = true |
Adam Langley | 2a8c81f | 2016-06-01 14:41:09 -0700 | [diff] [blame] | 115 | c.buffering = true |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 116 | if err := hs.sendSessionTicket(); err != nil { |
| 117 | return err |
| 118 | } |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 119 | if err := hs.sendFinished(nil); err != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 120 | return err |
| 121 | } |
Adam Langley | 2a8c81f | 2016-06-01 14:41:09 -0700 | [diff] [blame] | 122 | if _, err := c.flush(); err != nil { |
| 123 | return err |
| 124 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 125 | } |
Mike Danese | c529141 | 2017-12-20 19:47:49 -0800 | [diff] [blame] | 126 | |
| 127 | c.ekm = ekmFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random) |
Minaev Mike | e5b1340 | 2018-01-26 09:17:46 +0000 | [diff] [blame] | 128 | atomic.StoreUint32(&c.handshakeStatus, 1) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 129 | |
| 130 | return nil |
| 131 | } |
| 132 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 133 | // readClientHello reads a ClientHello message and selects the protocol version. |
| 134 | func (c *Conn) readClientHello() (*clientHelloMsg, error) { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 135 | msg, err := c.readHandshake() |
| 136 | if err != nil { |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 137 | return nil, err |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 138 | } |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 139 | clientHello, ok := msg.(*clientHelloMsg) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 140 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 141 | c.sendAlert(alertUnexpectedMessage) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 142 | return nil, unexpectedMessageError(clientHello, msg) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 143 | } |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 144 | |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 145 | if c.config.GetConfigForClient != nil { |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 146 | chi := clientHelloInfo(c, clientHello) |
| 147 | if newConfig, err := c.config.GetConfigForClient(chi); err != nil { |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 148 | c.sendAlert(alertInternalError) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 149 | return nil, err |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 150 | } else if newConfig != nil { |
Adam Langley | 46f4bfb | 2017-04-28 13:37:52 -0700 | [diff] [blame] | 151 | newConfig.serverInitOnce.Do(func() { newConfig.serverInit(c.config) }) |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 152 | c.config = newConfig |
| 153 | } |
| 154 | } |
| 155 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 156 | clientVersions := clientHello.supportedVersions |
| 157 | if len(clientHello.supportedVersions) == 0 { |
| 158 | clientVersions = supportedVersionsFromMax(clientHello.vers) |
Filippo Valsorda | 7f5dce0 | 2018-10-31 09:34:10 -0400 | [diff] [blame] | 159 | } |
| 160 | c.vers, ok = c.config.mutualVersion(false, clientVersions) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 161 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 162 | c.sendAlert(alertProtocolVersion) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 163 | return nil, fmt.Errorf("tls: client offered only unsupported versions: %x", clientVersions) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 164 | } |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 165 | c.haveVers = true |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 166 | c.in.version = c.vers |
| 167 | c.out.version = c.vers |
| 168 | |
| 169 | return clientHello, nil |
| 170 | } |
| 171 | |
| 172 | func (hs *serverHandshakeState) processClientHello() error { |
| 173 | c := hs.c |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 174 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 175 | hs.hello = new(serverHelloMsg) |
Filippo Valsorda | 7f5dce0 | 2018-10-31 09:34:10 -0400 | [diff] [blame] | 176 | hs.hello.vers = c.vers |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 177 | |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 178 | supportedCurve := false |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 179 | preferredCurves := c.config.curvePreferences() |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 180 | Curves: |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 181 | for _, curve := range hs.clientHello.supportedCurves { |
Adam Langley | db99a8f | 2014-02-24 17:57:51 -0500 | [diff] [blame] | 182 | for _, supported := range preferredCurves { |
| 183 | if supported == curve { |
| 184 | supportedCurve = true |
| 185 | break Curves |
| 186 | } |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 187 | } |
| 188 | } |
| 189 | |
| 190 | supportedPointFormat := false |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 191 | for _, pointFormat := range hs.clientHello.supportedPoints { |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 192 | if pointFormat == pointFormatUncompressed { |
| 193 | supportedPointFormat = true |
| 194 | break |
| 195 | } |
| 196 | } |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 197 | hs.ecdhOk = supportedCurve && supportedPointFormat |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 198 | |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 199 | foundCompression := false |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 200 | // We only support null compression, so check that the client offered it. |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 201 | for _, compression := range hs.clientHello.compressionMethods { |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 202 | if compression == compressionNone { |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 203 | foundCompression = true |
| 204 | break |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 205 | } |
| 206 | } |
| 207 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 208 | if !foundCompression { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 209 | c.sendAlert(alertHandshakeFailure) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 210 | return errors.New("tls: client does not support uncompressed connections") |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 211 | } |
| 212 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 213 | hs.hello.random = make([]byte, 32) |
Filippo Valsorda | 46d4aa2 | 2018-11-05 20:39:45 -0500 | [diff] [blame] | 214 | serverRandom := hs.hello.random |
| 215 | // Downgrade protection canaries. See RFC 8446, Section 4.1.3. |
| 216 | maxVers := c.config.maxSupportedVersion(false) |
| 217 | if maxVers >= VersionTLS12 && c.vers < maxVers { |
| 218 | if c.vers == VersionTLS12 { |
| 219 | copy(serverRandom[24:], downgradeCanaryTLS12) |
| 220 | } else { |
| 221 | copy(serverRandom[24:], downgradeCanaryTLS11) |
| 222 | } |
| 223 | serverRandom = serverRandom[:24] |
| 224 | } |
| 225 | _, err := io.ReadFull(c.config.rand(), serverRandom) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 226 | if err != nil { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 227 | c.sendAlert(alertInternalError) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 228 | return err |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 229 | } |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 230 | |
| 231 | if len(hs.clientHello.secureRenegotiation) != 0 { |
| 232 | c.sendAlert(alertHandshakeFailure) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 233 | return errors.New("tls: initial handshake had non-empty renegotiation extension") |
Adam Langley | af125a5 | 2016-04-26 10:45:35 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | hs.hello.secureRenegotiationSupported = hs.clientHello.secureRenegotiationSupported |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 237 | hs.hello.compressionMethod = compressionNone |
| 238 | if len(hs.clientHello.serverName) > 0 { |
| 239 | c.serverName = hs.clientHello.serverName |
Adam Langley | 9ebb596 | 2009-12-23 11:13:09 -0800 | [diff] [blame] | 240 | } |
Adam Langley | d0e255f | 2014-08-05 11:36:20 -0700 | [diff] [blame] | 241 | |
| 242 | if len(hs.clientHello.alpnProtocols) > 0 { |
| 243 | if selectedProto, fallback := mutualProtocol(hs.clientHello.alpnProtocols, c.config.NextProtos); !fallback { |
| 244 | hs.hello.alpnProtocol = selectedProto |
| 245 | c.clientProtocol = selectedProto |
| 246 | } |
| 247 | } else { |
| 248 | // Although sending an empty NPN extension is reasonable, Firefox has |
| 249 | // had a bug around this. Best to send nothing at all if |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 250 | // c.config.NextProtos is empty. See |
Péter Surányi | 9b6ccb1 | 2015-02-06 21:44:39 +0900 | [diff] [blame] | 251 | // https://golang.org/issue/5445. |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 252 | if hs.clientHello.nextProtoNeg && len(c.config.NextProtos) > 0 { |
Adam Langley | d0e255f | 2014-08-05 11:36:20 -0700 | [diff] [blame] | 253 | hs.hello.nextProtoNeg = true |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 254 | hs.hello.nextProtos = c.config.NextProtos |
Adam Langley | d0e255f | 2014-08-05 11:36:20 -0700 | [diff] [blame] | 255 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 256 | } |
| 257 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 258 | hs.cert, err = c.config.getCertificate(clientHelloInfo(c, hs.clientHello)) |
Emmanuel Odeke | f0711b9 | 2016-03-14 03:35:13 -0600 | [diff] [blame] | 259 | if err != nil { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 260 | c.sendAlert(alertInternalError) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 261 | return err |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 262 | } |
Jonathan Rudenberg | 02e69c4 | 2015-04-16 14:59:22 -0400 | [diff] [blame] | 263 | if hs.clientHello.scts { |
| 264 | hs.hello.scts = hs.cert.SignedCertificateTimestamps |
| 265 | } |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 266 | |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 267 | if priv, ok := hs.cert.PrivateKey.(crypto.Signer); ok { |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 268 | switch priv.Public().(type) { |
| 269 | case *ecdsa.PublicKey: |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 270 | hs.ecSignOk = true |
| 271 | case ed25519.PublicKey: |
| 272 | hs.ecSignOk = true |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 273 | case *rsa.PublicKey: |
Adam Langley | 7b850ec6 | 2015-04-02 16:19:46 -0700 | [diff] [blame] | 274 | hs.rsaSignOk = true |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 275 | default: |
| 276 | c.sendAlert(alertInternalError) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 277 | return fmt.Errorf("tls: unsupported signing key type (%T)", priv.Public()) |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 278 | } |
| 279 | } |
| 280 | if priv, ok := hs.cert.PrivateKey.(crypto.Decrypter); ok { |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 281 | switch priv.Public().(type) { |
| 282 | case *rsa.PublicKey: |
Adam Langley | 7b850ec6 | 2015-04-02 16:19:46 -0700 | [diff] [blame] | 283 | hs.rsaDecryptOk = true |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 284 | default: |
| 285 | c.sendAlert(alertInternalError) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 286 | return fmt.Errorf("tls: unsupported decryption key type (%T)", priv.Public()) |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 287 | } |
| 288 | } |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 289 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 290 | return nil |
| 291 | } |
| 292 | |
| 293 | func (hs *serverHandshakeState) pickCipherSuite() error { |
| 294 | c := hs.c |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 295 | |
Adam Langley | 793cbd5 | 2013-01-22 10:10:38 -0500 | [diff] [blame] | 296 | var preferenceList, supportedList []uint16 |
| 297 | if c.config.PreferServerCipherSuites { |
| 298 | preferenceList = c.config.cipherSuites() |
| 299 | supportedList = hs.clientHello.cipherSuites |
| 300 | } else { |
| 301 | preferenceList = hs.clientHello.cipherSuites |
| 302 | supportedList = c.config.cipherSuites() |
| 303 | } |
| 304 | |
| 305 | for _, id := range preferenceList { |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 306 | if hs.setCipherSuite(id, supportedList, c.vers) { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 307 | break |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | if hs.suite == nil { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 312 | c.sendAlert(alertHandshakeFailure) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 313 | return errors.New("tls: no cipher suite supported by both client and server") |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 314 | } |
| 315 | |
Adam Langley | e5624ed | 2014-10-15 17:54:04 -0700 | [diff] [blame] | 316 | for _, id := range hs.clientHello.cipherSuites { |
| 317 | if id == TLS_FALLBACK_SCSV { |
Filippo Valsorda | 46d4aa2 | 2018-11-05 20:39:45 -0500 | [diff] [blame] | 318 | // The client is doing a fallback connection. See RFC 7507. |
| 319 | if hs.clientHello.vers < c.config.maxSupportedVersion(false) { |
Adam Langley | e5624ed | 2014-10-15 17:54:04 -0700 | [diff] [blame] | 320 | c.sendAlert(alertInappropriateFallback) |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 321 | return errors.New("tls: client using inappropriate protocol fallback") |
Adam Langley | e5624ed | 2014-10-15 17:54:04 -0700 | [diff] [blame] | 322 | } |
| 323 | break |
| 324 | } |
| 325 | } |
| 326 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 327 | return nil |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 328 | } |
| 329 | |
Josh Bleecher Snyder | 2adc4e8 | 2015-02-17 15:44:42 -0800 | [diff] [blame] | 330 | // checkForResumption reports whether we should perform resumption on this connection. |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 331 | func (hs *serverHandshakeState) checkForResumption() bool { |
| 332 | c := hs.c |
| 333 | |
Adam Langley | 64df53e | 2014-09-26 11:02:09 +1000 | [diff] [blame] | 334 | if c.config.SessionTicketsDisabled { |
| 335 | return false |
| 336 | } |
| 337 | |
Filippo Valsorda | 6435d0c | 2018-11-05 15:59:08 -0500 | [diff] [blame] | 338 | plaintext, usedOldKey := c.decryptTicket(hs.clientHello.sessionTicket) |
| 339 | if plaintext == nil { |
| 340 | return false |
| 341 | } |
| 342 | hs.sessionState = &sessionState{usedOldKey: usedOldKey} |
| 343 | ok := hs.sessionState.unmarshal(plaintext) |
| 344 | if !ok { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 345 | return false |
| 346 | } |
| 347 | |
David Benjamin | ebbe4f8 | 2016-02-15 11:41:40 -0500 | [diff] [blame] | 348 | // Never resume a session for a different TLS version. |
| 349 | if c.vers != hs.sessionState.vers { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 350 | return false |
| 351 | } |
| 352 | |
| 353 | cipherSuiteOk := false |
| 354 | // Check that the client is still offering the ciphersuite in the session. |
| 355 | for _, id := range hs.clientHello.cipherSuites { |
| 356 | if id == hs.sessionState.cipherSuite { |
| 357 | cipherSuiteOk = true |
| 358 | break |
| 359 | } |
| 360 | } |
| 361 | if !cipherSuiteOk { |
| 362 | return false |
| 363 | } |
| 364 | |
| 365 | // Check that we also support the ciphersuite from the session. |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 366 | if !hs.setCipherSuite(hs.sessionState.cipherSuite, c.config.cipherSuites(), hs.sessionState.vers) { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 367 | return false |
| 368 | } |
| 369 | |
| 370 | sessionHasClientCerts := len(hs.sessionState.certificates) != 0 |
Filippo Valsorda | 6435d0c | 2018-11-05 15:59:08 -0500 | [diff] [blame] | 371 | needClientCerts := requiresClientCert(c.config.ClientAuth) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 372 | if needClientCerts && !sessionHasClientCerts { |
| 373 | return false |
| 374 | } |
| 375 | if sessionHasClientCerts && c.config.ClientAuth == NoClientCert { |
| 376 | return false |
| 377 | } |
| 378 | |
| 379 | return true |
| 380 | } |
| 381 | |
| 382 | func (hs *serverHandshakeState) doResumeHandshake() error { |
| 383 | c := hs.c |
| 384 | |
| 385 | hs.hello.cipherSuite = hs.suite.id |
| 386 | // We echo the client's session ID in the ServerHello to let it know |
| 387 | // that we're doing a resumption. |
| 388 | hs.hello.sessionId = hs.clientHello.sessionId |
Jonathan Rudenberg | bff1417 | 2015-04-17 21:32:11 -0400 | [diff] [blame] | 389 | hs.hello.ticketSupported = hs.sessionState.usedOldKey |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 390 | hs.finishedHash = newFinishedHash(c.vers, hs.suite) |
| 391 | hs.finishedHash.discardHandshakeBuffer() |
| 392 | hs.finishedHash.Write(hs.clientHello.marshal()) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 393 | hs.finishedHash.Write(hs.hello.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 394 | if _, err := c.writeRecord(recordTypeHandshake, hs.hello.marshal()); err != nil { |
| 395 | return err |
| 396 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 397 | |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 398 | if err := c.processCertsFromClient(Certificate{ |
| 399 | Certificate: hs.sessionState.certificates, |
| 400 | }); err != nil { |
| 401 | return err |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | hs.masterSecret = hs.sessionState.masterSecret |
| 405 | |
| 406 | return nil |
| 407 | } |
| 408 | |
| 409 | func (hs *serverHandshakeState) doFullHandshake() error { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 410 | c := hs.c |
Adam Langley | e6e8b72 | 2012-04-12 12:35:21 -0400 | [diff] [blame] | 411 | |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 412 | if hs.clientHello.ocspStapling && len(hs.cert.OCSPStaple) > 0 { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 413 | hs.hello.ocspStapling = true |
Adam Langley | 6f921f2 | 2011-04-14 14:47:28 -0400 | [diff] [blame] | 414 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 415 | |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 416 | hs.hello.ticketSupported = hs.clientHello.ticketSupported && !c.config.SessionTicketsDisabled |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 417 | hs.hello.cipherSuite = hs.suite.id |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 418 | |
| 419 | hs.finishedHash = newFinishedHash(hs.c.vers, hs.suite) |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 420 | if c.config.ClientAuth == NoClientCert { |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 421 | // No need to keep a full record of the handshake if client |
| 422 | // certificates won't be used. |
| 423 | hs.finishedHash.discardHandshakeBuffer() |
| 424 | } |
| 425 | hs.finishedHash.Write(hs.clientHello.marshal()) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 426 | hs.finishedHash.Write(hs.hello.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 427 | if _, err := c.writeRecord(recordTypeHandshake, hs.hello.marshal()); err != nil { |
| 428 | return err |
| 429 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 430 | |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 431 | certMsg := new(certificateMsg) |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 432 | certMsg.certificates = hs.cert.Certificate |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 433 | hs.finishedHash.Write(certMsg.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 434 | if _, err := c.writeRecord(recordTypeHandshake, certMsg.marshal()); err != nil { |
| 435 | return err |
| 436 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 437 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 438 | if hs.hello.ocspStapling { |
Adam Langley | 6f921f2 | 2011-04-14 14:47:28 -0400 | [diff] [blame] | 439 | certStatus := new(certificateStatusMsg) |
Adam Langley | eef7035 | 2013-09-17 13:30:36 -0400 | [diff] [blame] | 440 | certStatus.response = hs.cert.OCSPStaple |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 441 | hs.finishedHash.Write(certStatus.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 442 | if _, err := c.writeRecord(recordTypeHandshake, certStatus.marshal()); err != nil { |
| 443 | return err |
| 444 | } |
Adam Langley | 6f921f2 | 2011-04-14 14:47:28 -0400 | [diff] [blame] | 445 | } |
| 446 | |
Adam Langley | 7e76779 | 2013-07-02 19:58:56 -0400 | [diff] [blame] | 447 | keyAgreement := hs.suite.ka(c.vers) |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 448 | skx, err := keyAgreement.generateServerKeyExchange(c.config, hs.cert, hs.clientHello, hs.hello) |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 449 | if err != nil { |
| 450 | c.sendAlert(alertHandshakeFailure) |
| 451 | return err |
| 452 | } |
| 453 | if skx != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 454 | hs.finishedHash.Write(skx.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 455 | if _, err := c.writeRecord(recordTypeHandshake, skx.marshal()); err != nil { |
| 456 | return err |
| 457 | } |
Adam Langley | 4883b73 | 2010-12-16 17:10:50 -0500 | [diff] [blame] | 458 | } |
| 459 | |
Filippo Valsorda | 0b3a57b | 2019-06-13 18:33:33 -0400 | [diff] [blame^] | 460 | var certReq *certificateRequestMsg |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 461 | if c.config.ClientAuth >= RequestClientCert { |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 462 | // Request a client certificate |
Filippo Valsorda | 0b3a57b | 2019-06-13 18:33:33 -0400 | [diff] [blame^] | 463 | certReq = new(certificateRequestMsg) |
Joel Sing | 7b7dac5 | 2013-07-17 12:33:16 -0400 | [diff] [blame] | 464 | certReq.certificateTypes = []byte{ |
| 465 | byte(certTypeRSASign), |
| 466 | byte(certTypeECDSASign), |
| 467 | } |
Adam Langley | 7e76779 | 2013-07-02 19:58:56 -0400 | [diff] [blame] | 468 | if c.vers >= VersionTLS12 { |
Filippo Valsorda | 4c8b09e | 2018-10-24 21:22:00 -0400 | [diff] [blame] | 469 | certReq.hasSignatureAlgorithm = true |
Filippo Valsorda | 0b3a57b | 2019-06-13 18:33:33 -0400 | [diff] [blame^] | 470 | certReq.supportedSignatureAlgorithms = supportedSignatureAlgorithmsTLS12 |
Adam Langley | 7e76779 | 2013-07-02 19:58:56 -0400 | [diff] [blame] | 471 | } |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 472 | |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 473 | // An empty list of certificateAuthorities signals to |
| 474 | // the client that it may send any certificate in response |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 475 | // to our request. When we know the CAs we trust, then |
| 476 | // we can send them down, so that the client can choose |
| 477 | // an appropriate certificate to give to us. |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 478 | if c.config.ClientCAs != nil { |
| 479 | certReq.certificateAuthorities = c.config.ClientCAs.Subjects() |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 480 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 481 | hs.finishedHash.Write(certReq.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 482 | if _, err := c.writeRecord(recordTypeHandshake, certReq.marshal()); err != nil { |
| 483 | return err |
| 484 | } |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 485 | } |
| 486 | |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 487 | helloDone := new(serverHelloDoneMsg) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 488 | hs.finishedHash.Write(helloDone.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 489 | if _, err := c.writeRecord(recordTypeHandshake, helloDone.marshal()); err != nil { |
| 490 | return err |
| 491 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 492 | |
Adam Langley | 2a8c81f | 2016-06-01 14:41:09 -0700 | [diff] [blame] | 493 | if _, err := c.flush(); err != nil { |
| 494 | return err |
| 495 | } |
| 496 | |
Joel Sing | 7b7dac5 | 2013-07-17 12:33:16 -0400 | [diff] [blame] | 497 | var pub crypto.PublicKey // public key for client auth, if any |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 498 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 499 | msg, err := c.readHandshake() |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 500 | if err != nil { |
| 501 | return err |
| 502 | } |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 503 | |
| 504 | // If we requested a client certificate, then the client must send a |
| 505 | // certificate message, even if it's empty. |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 506 | if c.config.ClientAuth >= RequestClientCert { |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 507 | certMsg, ok := msg.(*certificateMsg) |
| 508 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 509 | c.sendAlert(alertUnexpectedMessage) |
| 510 | return unexpectedMessageError(certMsg, msg) |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 511 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 512 | hs.finishedHash.Write(certMsg.marshal()) |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 513 | |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 514 | if err := c.processCertsFromClient(Certificate{ |
| 515 | Certificate: certMsg.certificates, |
| 516 | }); err != nil { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 517 | return err |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 518 | } |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 519 | if len(certMsg.certificates) != 0 { |
| 520 | pub = c.peerCertificates[0].PublicKey |
| 521 | } |
Jeff R. Allen | c581ec4 | 2012-01-05 12:05:38 -0500 | [diff] [blame] | 522 | |
| 523 | msg, err = c.readHandshake() |
| 524 | if err != nil { |
| 525 | return err |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | // Get client key exchange |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 530 | ckx, ok := msg.(*clientKeyExchangeMsg) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 531 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 532 | c.sendAlert(alertUnexpectedMessage) |
| 533 | return unexpectedMessageError(ckx, msg) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 534 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 535 | hs.finishedHash.Write(ckx.marshal()) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 536 | |
Adam Langley | cff3e75 | 2016-10-10 15:27:34 -0700 | [diff] [blame] | 537 | preMasterSecret, err := keyAgreement.processClientKeyExchange(c.config, hs.cert, ckx, c.vers) |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 538 | if err != nil { |
| 539 | c.sendAlert(alertHandshakeFailure) |
| 540 | return err |
| 541 | } |
| 542 | hs.masterSecret = masterFromPreMasterSecret(c.vers, hs.suite, preMasterSecret, hs.clientHello.random, hs.hello.random) |
Filippo Valsorda | 29b01d5 | 2018-11-03 18:13:05 -0400 | [diff] [blame] | 543 | if err := c.config.writeKeyLog(keyLogLabelTLS12, hs.clientHello.random, hs.masterSecret); err != nil { |
Joonas Kuorilehto | 320bd56 | 2016-08-20 14:41:42 +0300 | [diff] [blame] | 544 | c.sendAlert(alertInternalError) |
| 545 | return err |
| 546 | } |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 547 | |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 548 | // If we received a client cert in response to our certificate request message, |
| 549 | // the client will send us a certificateVerifyMsg immediately after the |
Brad Fitzpatrick | 5fea2cc | 2016-03-01 23:21:55 +0000 | [diff] [blame] | 550 | // clientKeyExchangeMsg. This message is a digest of all preceding |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 551 | // handshake-layer messages that is signed using the private key corresponding |
| 552 | // to the client's certificate. This allows us to verify that the client is in |
Robert Hencke | c8727c8 | 2011-05-18 13:14:56 -0400 | [diff] [blame] | 553 | // possession of the private key of the certificate. |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 554 | if len(c.peerCertificates) > 0 { |
| 555 | msg, err = c.readHandshake() |
| 556 | if err != nil { |
| 557 | return err |
| 558 | } |
| 559 | certVerify, ok := msg.(*certificateVerifyMsg) |
| 560 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 561 | c.sendAlert(alertUnexpectedMessage) |
| 562 | return unexpectedMessageError(certVerify, msg) |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 563 | } |
| 564 | |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 565 | // Determine the signature type. |
Filippo Valsorda | 0b3a57b | 2019-06-13 18:33:33 -0400 | [diff] [blame^] | 566 | _, sigType, hashFunc, err := pickSignatureAlgorithm(pub, []SignatureScheme{certVerify.signatureAlgorithm}, certReq.supportedSignatureAlgorithms, c.vers) |
Peter Wu | c89d75f | 2017-11-22 18:25:20 +0000 | [diff] [blame] | 567 | if err != nil { |
| 568 | c.sendAlert(alertIllegalParameter) |
| 569 | return err |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 570 | } |
| 571 | |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 572 | signed, err := hs.finishedHash.hashForClientCertificate(sigType, hashFunc, hs.masterSecret) |
| 573 | if err == nil { |
| 574 | err = verifyHandshakeSignature(sigType, pub, hashFunc, signed, certVerify.signature) |
Joel Sing | 7b7dac5 | 2013-07-17 12:33:16 -0400 | [diff] [blame] | 575 | } |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 576 | if err != nil { |
Adam Langley | f6e2eab | 2010-10-11 10:39:56 -0400 | [diff] [blame] | 577 | c.sendAlert(alertBadCertificate) |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 578 | return errors.New("tls: could not validate signature of connection nonces: " + err.Error()) |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 579 | } |
| 580 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 581 | hs.finishedHash.Write(certVerify.marshal()) |
Mikkel Krautz | c47123d | 2010-08-16 11:22:22 -0400 | [diff] [blame] | 582 | } |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 583 | |
| 584 | hs.finishedHash.discardHandshakeBuffer() |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 585 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 586 | return nil |
| 587 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 588 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 589 | func (hs *serverHandshakeState) establishKeys() error { |
| 590 | c := hs.c |
| 591 | |
| 592 | clientMAC, serverMAC, clientKey, serverKey, clientIV, serverIV := |
Adam Langley | 09b238f | 2015-04-28 09:13:38 -0700 | [diff] [blame] | 593 | keysFromMasterSecret(c.vers, hs.suite, hs.masterSecret, hs.clientHello.random, hs.hello.random, hs.suite.macLen, hs.suite.keyLen, hs.suite.ivLen) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 594 | |
Adam Langley | 2fe9a5a | 2013-08-29 17:18:59 -0400 | [diff] [blame] | 595 | var clientCipher, serverCipher interface{} |
| 596 | var clientHash, serverHash macFunction |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 597 | |
Adam Langley | 2fe9a5a | 2013-08-29 17:18:59 -0400 | [diff] [blame] | 598 | if hs.suite.aead == nil { |
| 599 | clientCipher = hs.suite.cipher(clientKey, clientIV, true /* for reading */) |
| 600 | clientHash = hs.suite.mac(c.vers, clientMAC) |
| 601 | serverCipher = hs.suite.cipher(serverKey, serverIV, false /* not for reading */) |
| 602 | serverHash = hs.suite.mac(c.vers, serverMAC) |
| 603 | } else { |
| 604 | clientCipher = hs.suite.aead(clientKey, clientIV) |
| 605 | serverCipher = hs.suite.aead(serverKey, serverIV) |
| 606 | } |
| 607 | |
| 608 | c.in.prepareCipherSpec(c.vers, clientCipher, clientHash) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 609 | c.out.prepareCipherSpec(c.vers, serverCipher, serverHash) |
| 610 | |
| 611 | return nil |
| 612 | } |
| 613 | |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 614 | func (hs *serverHandshakeState) readFinished(out []byte) error { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 615 | c := hs.c |
| 616 | |
Filippo Valsorda | db27e78 | 2018-11-03 18:29:09 -0400 | [diff] [blame] | 617 | if err := c.readChangeCipherSpec(); err != nil { |
| 618 | return err |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 619 | } |
| 620 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 621 | if hs.hello.nextProtoNeg { |
| 622 | msg, err := c.readHandshake() |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 623 | if err != nil { |
| 624 | return err |
| 625 | } |
| 626 | nextProto, ok := msg.(*nextProtoMsg) |
Adam Langley | 9ebb596 | 2009-12-23 11:13:09 -0800 | [diff] [blame] | 627 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 628 | c.sendAlert(alertUnexpectedMessage) |
| 629 | return unexpectedMessageError(nextProto, msg) |
Adam Langley | 9ebb596 | 2009-12-23 11:13:09 -0800 | [diff] [blame] | 630 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 631 | hs.finishedHash.Write(nextProto.marshal()) |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 632 | c.clientProtocol = nextProto.proto |
Adam Langley | 9ebb596 | 2009-12-23 11:13:09 -0800 | [diff] [blame] | 633 | } |
| 634 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 635 | msg, err := c.readHandshake() |
Russ Cox | 72d9322 | 2010-04-26 22:19:04 -0700 | [diff] [blame] | 636 | if err != nil { |
| 637 | return err |
| 638 | } |
| 639 | clientFinished, ok := msg.(*finishedMsg) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 640 | if !ok { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 641 | c.sendAlert(alertUnexpectedMessage) |
| 642 | return unexpectedMessageError(clientFinished, msg) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 643 | } |
| 644 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 645 | verify := hs.finishedHash.clientSum(hs.masterSecret) |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 646 | if len(verify) != len(clientFinished.verifyData) || |
| 647 | subtle.ConstantTimeCompare(verify, clientFinished.verifyData) != 1 { |
Adam Langley | 6b29f7b | 2014-02-12 11:20:01 -0500 | [diff] [blame] | 648 | c.sendAlert(alertHandshakeFailure) |
| 649 | return errors.New("tls: client's Finished message is incorrect") |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 650 | } |
| 651 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 652 | hs.finishedHash.Write(clientFinished.marshal()) |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 653 | copy(out, verify) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 654 | return nil |
| 655 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 656 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 657 | func (hs *serverHandshakeState) sendSessionTicket() error { |
| 658 | if !hs.hello.ticketSupported { |
| 659 | return nil |
| 660 | } |
| 661 | |
| 662 | c := hs.c |
| 663 | m := new(newSessionTicketMsg) |
| 664 | |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 665 | var certsFromClient [][]byte |
| 666 | for _, cert := range c.peerCertificates { |
| 667 | certsFromClient = append(certsFromClient, cert.Raw) |
| 668 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 669 | state := sessionState{ |
| 670 | vers: c.vers, |
| 671 | cipherSuite: hs.suite.id, |
| 672 | masterSecret: hs.masterSecret, |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 673 | certificates: certsFromClient, |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 674 | } |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 675 | var err error |
Filippo Valsorda | 6435d0c | 2018-11-05 15:59:08 -0500 | [diff] [blame] | 676 | m.ticket, err = c.encryptTicket(state.marshal()) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 677 | if err != nil { |
| 678 | return err |
| 679 | } |
| 680 | |
| 681 | hs.finishedHash.Write(m.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 682 | if _, err := c.writeRecord(recordTypeHandshake, m.marshal()); err != nil { |
| 683 | return err |
| 684 | } |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 685 | |
| 686 | return nil |
| 687 | } |
| 688 | |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 689 | func (hs *serverHandshakeState) sendFinished(out []byte) error { |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 690 | c := hs.c |
| 691 | |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 692 | if _, err := c.writeRecord(recordTypeChangeCipherSpec, []byte{1}); err != nil { |
| 693 | return err |
| 694 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 695 | |
Robert Griesemer | 5a1d332 | 2009-12-15 15:33:31 -0800 | [diff] [blame] | 696 | finished := new(finishedMsg) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 697 | finished.verifyData = hs.finishedHash.serverSum(hs.masterSecret) |
| 698 | hs.finishedHash.Write(finished.marshal()) |
Tamir Duberstein | 37c2875 | 2016-02-26 14:17:29 -0500 | [diff] [blame] | 699 | if _, err := c.writeRecord(recordTypeHandshake, finished.marshal()); err != nil { |
| 700 | return err |
| 701 | } |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 702 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 703 | c.cipherSuite = hs.suite.id |
Andres Erbsen | fce6388 | 2014-08-11 16:40:42 -0700 | [diff] [blame] | 704 | copy(out, finished.verifyData) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 705 | |
| 706 | return nil |
| 707 | } |
| 708 | |
| 709 | // processCertsFromClient takes a chain of client certificates either from a |
| 710 | // Certificates message or from a sessionState and verifies them. It returns |
| 711 | // the public key of the leaf certificate. |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 712 | func (c *Conn) processCertsFromClient(certificate Certificate) error { |
| 713 | certificates := certificate.Certificate |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 714 | certs := make([]*x509.Certificate, len(certificates)) |
| 715 | var err error |
| 716 | for i, asn1Data := range certificates { |
| 717 | if certs[i], err = x509.ParseCertificate(asn1Data); err != nil { |
| 718 | c.sendAlert(alertBadCertificate) |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 719 | return errors.New("tls: failed to parse client certificate: " + err.Error()) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 720 | } |
| 721 | } |
| 722 | |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 723 | if len(certs) == 0 && requiresClientCert(c.config.ClientAuth) { |
| 724 | c.sendAlert(alertBadCertificate) |
| 725 | return errors.New("tls: client didn't provide a certificate") |
| 726 | } |
| 727 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 728 | if c.config.ClientAuth >= VerifyClientCertIfGiven && len(certs) > 0 { |
| 729 | opts := x509.VerifyOptions{ |
| 730 | Roots: c.config.ClientCAs, |
| 731 | CurrentTime: c.config.time(), |
| 732 | Intermediates: x509.NewCertPool(), |
| 733 | KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth}, |
| 734 | } |
| 735 | |
| 736 | for _, cert := range certs[1:] { |
| 737 | opts.Intermediates.AddCert(cert) |
| 738 | } |
| 739 | |
| 740 | chains, err := certs[0].Verify(opts) |
| 741 | if err != nil { |
| 742 | c.sendAlert(alertBadCertificate) |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 743 | return errors.New("tls: failed to verify client's certificate: " + err.Error()) |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 744 | } |
| 745 | |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 746 | c.verifiedChains = chains |
| 747 | } |
| 748 | |
Joshua Boelter | 426c287 | 2016-07-13 16:22:28 -0600 | [diff] [blame] | 749 | if c.config.VerifyPeerCertificate != nil { |
| 750 | if err := c.config.VerifyPeerCertificate(certificates, c.verifiedChains); err != nil { |
| 751 | c.sendAlert(alertBadCertificate) |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 752 | return err |
Joshua Boelter | 426c287 | 2016-07-13 16:22:28 -0600 | [diff] [blame] | 753 | } |
| 754 | } |
| 755 | |
Emmanuel Odeke | f0711b9 | 2016-03-14 03:35:13 -0600 | [diff] [blame] | 756 | if len(certs) == 0 { |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 757 | return nil |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 758 | } |
| 759 | |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 760 | switch certs[0].PublicKey.(type) { |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 761 | case *ecdsa.PublicKey, *rsa.PublicKey, ed25519.PublicKey: |
Emmanuel Odeke | f0711b9 | 2016-03-14 03:35:13 -0600 | [diff] [blame] | 762 | default: |
| 763 | c.sendAlert(alertUnsupportedCertificate) |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 764 | return fmt.Errorf("tls: client's certificate contains an unsupported public key of type %T", certs[0].PublicKey) |
Emmanuel Odeke | f0711b9 | 2016-03-14 03:35:13 -0600 | [diff] [blame] | 765 | } |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 766 | |
Emmanuel Odeke | f0711b9 | 2016-03-14 03:35:13 -0600 | [diff] [blame] | 767 | c.peerCertificates = certs |
Filippo Valsorda | 106db71 | 2018-11-05 19:23:25 -0500 | [diff] [blame] | 768 | c.ocspResponse = certificate.OCSPStaple |
| 769 | c.scts = certificate.SignedCertificateTimestamps |
| 770 | return nil |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 771 | } |
| 772 | |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 773 | // setCipherSuite sets a cipherSuite with the given id as the serverHandshakeState |
| 774 | // suite if that cipher suite is acceptable to use. |
| 775 | // It returns a bool indicating if the suite was set. |
| 776 | func (hs *serverHandshakeState) setCipherSuite(id uint16, supportedCipherSuites []uint16, version uint16) bool { |
Adam Langley | 793cbd5 | 2013-01-22 10:10:38 -0500 | [diff] [blame] | 777 | for _, supported := range supportedCipherSuites { |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 778 | if id != supported { |
| 779 | continue |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 780 | } |
Filippo Valsorda | f353385 | 2019-05-16 19:13:29 -0400 | [diff] [blame] | 781 | candidate := cipherSuiteByID(id) |
| 782 | if candidate == nil { |
| 783 | continue |
| 784 | } |
| 785 | // Don't select a ciphersuite which we can't |
| 786 | // support for this client. |
| 787 | if candidate.flags&suiteECDHE != 0 { |
| 788 | if !hs.ecdhOk { |
| 789 | continue |
| 790 | } |
| 791 | if candidate.flags&suiteECSign != 0 { |
| 792 | if !hs.ecSignOk { |
| 793 | continue |
| 794 | } |
| 795 | } else if !hs.rsaSignOk { |
| 796 | continue |
| 797 | } |
| 798 | } else if !hs.rsaDecryptOk { |
| 799 | continue |
| 800 | } |
| 801 | if version < VersionTLS12 && candidate.flags&suiteTLS12 != 0 { |
| 802 | continue |
| 803 | } |
| 804 | hs.suite = candidate |
| 805 | return true |
Adam Langley | 65c7dc4 | 2012-09-24 16:52:43 -0400 | [diff] [blame] | 806 | } |
Jacob H. Haven | 28f33b4 | 2015-03-19 04:01:57 -0700 | [diff] [blame] | 807 | return false |
Adam Langley | 5e598c5 | 2009-11-05 15:44:32 -0800 | [diff] [blame] | 808 | } |
Filippo Valsorda | 51c959b | 2016-10-19 15:21:54 +0200 | [diff] [blame] | 809 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 810 | func clientHelloInfo(c *Conn, clientHello *clientHelloMsg) *ClientHelloInfo { |
| 811 | supportedVersions := clientHello.supportedVersions |
| 812 | if len(clientHello.supportedVersions) == 0 { |
| 813 | supportedVersions = supportedVersionsFromMax(clientHello.vers) |
Filippo Valsorda | 51c959b | 2016-10-19 15:21:54 +0200 | [diff] [blame] | 814 | } |
| 815 | |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 816 | return &ClientHelloInfo{ |
| 817 | CipherSuites: clientHello.cipherSuites, |
| 818 | ServerName: clientHello.serverName, |
| 819 | SupportedCurves: clientHello.supportedCurves, |
| 820 | SupportedPoints: clientHello.supportedPoints, |
| 821 | SignatureSchemes: clientHello.supportedSignatureAlgorithms, |
| 822 | SupportedProtos: clientHello.alpnProtocols, |
Filippo Valsorda | 51c959b | 2016-10-19 15:21:54 +0200 | [diff] [blame] | 823 | SupportedVersions: supportedVersions, |
Filippo Valsorda | c21ba09 | 2018-11-02 00:57:30 -0400 | [diff] [blame] | 824 | Conn: c.conn, |
Filippo Valsorda | 51c959b | 2016-10-19 15:21:54 +0200 | [diff] [blame] | 825 | } |
Filippo Valsorda | 51c959b | 2016-10-19 15:21:54 +0200 | [diff] [blame] | 826 | } |