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th5/testdata/Client-TLSv10-ClientCert-ECDSA-RSA
Adam Langley 514cfc8a40 crypto/tls: pick ECDHE curves based on server preference. 
Currently an ECDHE handshake uses the client's curve preference. This
generally means that we use P-521. However, P-521's strength is
mismatched with the rest of the cipher suite in most cases and we have
a fast, constant-time implementation of P-256.

With this change, Go servers will use P-256 where the client supports
it although that can be overridden in the Config.

LGTM=bradfitz
R=bradfitz
CC=golang-codereviews
https://golang.org/cl/66060043
2014-02-24 17:57:51 -05:00

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>>> Flow 1 (client to server)
00000000 16 03 01 00 75 01 00 00 71 03 03 00 00 00 00 00 |....u...q.......|
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 00 00 1a c0 2f |.............../|
00000030 c0 2b c0 11 c0 07 c0 13 c0 09 c0 14 c0 0a 00 05 |.+..............|
00000040 00 2f 00 35 c0 12 00 0a 01 00 00 2e 00 05 00 05 |./.5............|
00000050 01 00 00 00 00 00 0a 00 08 00 06 00 17 00 18 00 |................|
00000060 19 00 0b 00 02 01 00 00 0d 00 0a 00 08 04 01 04 |................|
00000070 03 02 01 02 03 ff 01 00 01 00 |..........|
>>> Flow 2 (server to client)
00000000 16 03 01 00 51 02 00 00 4d 03 01 53 04 f1 02 ed |....Q...M..S....|
00000010 86 9c 56 84 5a d3 7d d7 f3 4e 6f 2c 69 0d f0 59 |..V.Z.}..No,i..Y|
00000020 a5 d1 de 2d 03 2f dd 63 c3 ab fa 20 30 d6 5a 24 |...-./.c... 0.Z$|
00000030 5c 31 67 36 8d 4c 43 e1 64 c4 8a 2c a5 fd 39 92 |\1g6.LC.d..,..9.|
00000040 c5 6f 58 47 a3 fe 63 14 98 92 11 90 00 05 00 00 |.oXG..c.........|
00000050 05 ff 01 00 01 00 16 03 01 02 be 0b 00 02 ba 00 |................|
00000060 02 b7 00 02 b4 30 82 02 b0 30 82 02 19 a0 03 02 |.....0...0......|
00000070 01 02 02 09 00 85 b0 bb a4 8a 7f b8 ca 30 0d 06 |.............0..|
00000080 09 2a 86 48 86 f7 0d 01 01 05 05 00 30 45 31 0b |.*.H........0E1.|
00000090 30 09 06 03 55 04 06 13 02 41 55 31 13 30 11 06 |0...U....AU1.0..|
000000a0 03 55 04 08 13 0a 53 6f 6d 65 2d 53 74 61 74 65 |.U....Some-State|
000000b0 31 21 30 1f 06 03 55 04 0a 13 18 49 6e 74 65 72 |1!0...U....Inter|
000000c0 6e 65 74 20 57 69 64 67 69 74 73 20 50 74 79 20 |net Widgits Pty |
000000d0 4c 74 64 30 1e 17 0d 31 30 30 34 32 34 30 39 30 |Ltd0...100424090|
000000e0 39 33 38 5a 17 0d 31 31 30 34 32 34 30 39 30 39 |938Z..1104240909|
000000f0 33 38 5a 30 45 31 0b 30 09 06 03 55 04 06 13 02 |38Z0E1.0...U....|
00000100 41 55 31 13 30 11 06 03 55 04 08 13 0a 53 6f 6d |AU1.0...U....Som|
00000110 65 2d 53 74 61 74 65 31 21 30 1f 06 03 55 04 0a |e-State1!0...U..|
00000120 13 18 49 6e 74 65 72 6e 65 74 20 57 69 64 67 69 |..Internet Widgi|
00000130 74 73 20 50 74 79 20 4c 74 64 30 81 9f 30 0d 06 |ts Pty Ltd0..0..|
00000140 09 2a 86 48 86 f7 0d 01 01 01 05 00 03 81 8d 00 |.*.H............|
00000150 30 81 89 02 81 81 00 bb 79 d6 f5 17 b5 e5 bf 46 |0.......y......F|
00000160 10 d0 dc 69 be e6 2b 07 43 5a d0 03 2d 8a 7a 43 |...i..+.CZ..-.zC|
00000170 85 b7 14 52 e7 a5 65 4c 2c 78 b8 23 8c b5 b4 82 |...R..eL,x.#....|
00000180 e5 de 1f 95 3b 7e 62 a5 2c a5 33 d6 fe 12 5c 7a |....;~b.,.3...\z|
00000190 56 fc f5 06 bf fa 58 7b 26 3f b5 cd 04 d3 d0 c9 |V.....X{&?......|
000001a0 21 96 4a c7 f4 54 9f 5a bf ef 42 71 00 fe 18 99 |!.J..T.Z..Bq....|
000001b0 07 7f 7e 88 7d 7d f1 04 39 c4 a2 2e db 51 c9 7c |..~.}}..9....Q.||
000001c0 e3 c0 4c 3b 32 66 01 cf af b1 1d b8 71 9a 1d db |..L;2f......q...|
000001d0 db 89 6b ae da 2d 79 02 03 01 00 01 a3 81 a7 30 |..k..-y........0|
000001e0 81 a4 30 1d 06 03 55 1d 0e 04 16 04 14 b1 ad e2 |..0...U.........|
000001f0 85 5a cf cb 28 db 69 ce 23 69 de d3 26 8e 18 88 |.Z..(.i.#i..&...|
00000200 39 30 75 06 03 55 1d 23 04 6e 30 6c 80 14 b1 ad |90u..U.#.n0l....|
00000210 e2 85 5a cf cb 28 db 69 ce 23 69 de d3 26 8e 18 |..Z..(.i.#i..&..|
00000220 88 39 a1 49 a4 47 30 45 31 0b 30 09 06 03 55 04 |.9.I.G0E1.0...U.|
00000230 06 13 02 41 55 31 13 30 11 06 03 55 04 08 13 0a |...AU1.0...U....|
00000240 53 6f 6d 65 2d 53 74 61 74 65 31 21 30 1f 06 03 |Some-State1!0...|
00000250 55 04 0a 13 18 49 6e 74 65 72 6e 65 74 20 57 69 |U....Internet Wi|
00000260 64 67 69 74 73 20 50 74 79 20 4c 74 64 82 09 00 |dgits Pty Ltd...|
00000270 85 b0 bb a4 8a 7f b8 ca 30 0c 06 03 55 1d 13 04 |........0...U...|
00000280 05 30 03 01 01 ff 30 0d 06 09 2a 86 48 86 f7 0d |.0....0...*.H...|
00000290 01 01 05 05 00 03 81 81 00 08 6c 45 24 c7 6b b1 |..........lE$.k.|
000002a0 59 ab 0c 52 cc f2 b0 14 d7 87 9d 7a 64 75 b5 5a |Y..R.......zdu.Z|
000002b0 95 66 e4 c5 2b 8e ae 12 66 1f eb 4f 38 b3 6e 60 |.f..+...f..O8.n`|
000002c0 d3 92 fd f7 41 08 b5 25 13 b1 18 7a 24 fb 30 1d |....A..%...z$.0.|
000002d0 ba ed 98 b9 17 ec e7 d7 31 59 db 95 d3 1d 78 ea |........1Y....x.|
000002e0 50 56 5c d5 82 5a 2d 5a 5f 33 c4 b6 d8 c9 75 90 |PV\..Z-Z_3....u.|
000002f0 96 8c 0f 52 98 b5 cd 98 1f 89 20 5f f2 a0 1c a3 |...R...... _....|
00000300 1b 96 94 dd a9 fd 57 e9 70 e8 26 6d 71 99 9b 26 |......W.p.&mq..&|
00000310 6e 38 50 29 6c 90 a7 bd d9 16 03 01 00 0e 0d 00 |n8P)l...........|
00000320 00 06 03 01 02 40 00 00 0e 00 00 00 |.....@......|
>>> Flow 3 (client to server)
00000000 16 03 01 02 0a 0b 00 02 06 00 02 03 00 02 00 30 |...............0|
00000010 82 01 fc 30 82 01 5e 02 09 00 9a 30 84 6c 26 35 |...0..^....0.l&5|
00000020 d9 17 30 09 06 07 2a 86 48 ce 3d 04 01 30 45 31 |..0...*.H.=..0E1|
00000030 0b 30 09 06 03 55 04 06 13 02 41 55 31 13 30 11 |.0...U....AU1.0.|
00000040 06 03 55 04 08 13 0a 53 6f 6d 65 2d 53 74 61 74 |..U....Some-Stat|
00000050 65 31 21 30 1f 06 03 55 04 0a 13 18 49 6e 74 65 |e1!0...U....Inte|
00000060 72 6e 65 74 20 57 69 64 67 69 74 73 20 50 74 79 |rnet Widgits Pty|
00000070 20 4c 74 64 30 1e 17 0d 31 32 31 31 31 34 31 33 | Ltd0...12111413|
00000080 32 35 35 33 5a 17 0d 32 32 31 31 31 32 31 33 32 |2553Z..221112132|
00000090 35 35 33 5a 30 41 31 0b 30 09 06 03 55 04 06 13 |553Z0A1.0...U...|
000000a0 02 41 55 31 0c 30 0a 06 03 55 04 08 13 03 4e 53 |.AU1.0...U....NS|
000000b0 57 31 10 30 0e 06 03 55 04 07 13 07 50 79 72 6d |W1.0...U....Pyrm|
000000c0 6f 6e 74 31 12 30 10 06 03 55 04 03 13 09 4a 6f |ont1.0...U....Jo|
000000d0 65 6c 20 53 69 6e 67 30 81 9b 30 10 06 07 2a 86 |el Sing0..0...*.|
000000e0 48 ce 3d 02 01 06 05 2b 81 04 00 23 03 81 86 00 |H.=....+...#....|
000000f0 04 00 95 8c 91 75 14 c0 5e c4 57 b4 d4 c3 6f 8d |.....u..^.W...o.|
00000100 ae 68 1e dd 6f ce 86 e1 7e 6e b2 48 3e 81 e5 4e |.h..o...~n.H>..N|
00000110 e2 c6 88 4b 64 dc f5 30 bb d3 ff 65 cc 5b f4 dd |...Kd..0...e.[..|
00000120 b5 6a 3e 3e d0 1d de 47 c3 76 ad 19 f6 45 2c 8c |.j>>...G.v...E,.|
00000130 bc d8 1d 01 4c 1f 70 90 46 76 48 8b 8f 83 cc 4a |....L.p.FvH....J|
00000140 5c 8f 40 76 da e0 89 ec 1d 2b c4 4e 30 76 28 41 |\.@v.....+.N0v(A|
00000150 b2 62 a8 fb 5b f1 f9 4e 7a 8d bd 09 b8 ae ea 8b |.b..[..Nz.......|
00000160 18 27 4f 2e 70 fe 13 96 ba c3 d3 40 16 cd 65 4e |.'O.p......@..eN|
00000170 ac 11 1e e6 f1 30 09 06 07 2a 86 48 ce 3d 04 01 |.....0...*.H.=..|
00000180 03 81 8c 00 30 81 88 02 42 00 e0 14 c4 60 60 0b |....0...B....``.|
00000190 72 68 b0 32 5d 61 4a 02 74 5c c2 81 b9 16 a8 3f |rh.2]aJ.t\.....?|
000001a0 29 c8 36 c7 81 ff 6c b6 5b d9 70 f1 38 3b 50 48 |).6...l.[.p.8;PH|
000001b0 28 94 cb 09 1a 52 f1 5d ee 8d f2 b9 f0 f0 da d9 |(....R.]........|
000001c0 15 3a f9 bd 03 7a 87 a2 23 35 ec 02 42 01 a3 d4 |.:...z..#5..B...|
000001d0 8a 78 35 1c 4a 9a 23 d2 0a be 2b 10 31 9d 9c 5f |.x5.J.#...+.1.._|
000001e0 be e8 91 b3 da 1a f5 5d a3 23 f5 26 8b 45 70 8d |.......].#.&.Ep.|
000001f0 65 62 9b 7e 01 99 3d 18 f6 10 9a 38 61 9b 2e 57 |eb.~..=....8a..W|
00000200 e4 fa cc b1 8a ce e2 23 a0 87 f0 e1 67 51 eb 16 |.......#....gQ..|
00000210 03 01 00 86 10 00 00 82 00 80 6d 51 f3 7f f9 3e |..........mQ...>|
00000220 fb 75 82 41 36 83 e8 6a ee 2a 2e 25 90 67 4c 8e |.u.A6..j.*.%.gL.|
00000230 62 2f 30 81 17 e0 85 09 0c 2b b7 23 d7 b0 e2 1d |b/0......+.#....|
00000240 f7 3b d7 f5 a1 27 b6 ee 24 b6 1b cc 5b ea 66 0d |.;...'..$...[.f.|
00000250 6a f4 e5 85 f9 da 43 b4 0e 86 85 e1 f5 aa be c8 |j.....C.........|
00000260 ce 39 4c 9c 86 00 08 c2 4b e2 c6 ec 2f f7 ce e6 |.9L.....K.../...|
00000270 bd 77 82 6f 23 b6 e0 bd a2 92 b7 3a ac e8 56 f1 |.w.o#......:..V.|
00000280 af 54 5e 46 87 e9 3b 33 e7 b8 28 b7 d6 c8 90 35 |.T^F..;3..(....5|
00000290 d4 1c 43 d1 30 6f 55 4e 0a 70 16 03 01 00 90 0f |..C.0oUN.p......|
000002a0 00 00 8c 00 8a 30 81 87 02 42 00 c6 85 8e 06 b7 |.....0...B......|
000002b0 04 04 e9 cd 9e 3e cb 66 23 95 b4 42 9c 64 81 39 |.....>.f#..B.d.9|
000002c0 05 3f b5 21 f8 28 af 60 6b 4d 3d ba a1 4b 5e 77 |.?.!.(.`kM=..K^w|
000002d0 ef e7 59 28 fe 1d c1 27 a2 ff a8 de 33 48 b3 c1 |..Y(...'....3H..|
000002e0 85 6a 42 9b f9 7e 7e 31 c2 e5 bd 66 02 41 4b 49 |.jB..~~1...f.AKI|
000002f0 c6 cd 02 e3 83 f7 03 50 18 6d b4 c9 51 02 c0 ab |.......P.m..Q...|
00000300 87 bc e0 3e 4b 89 53 3a e2 65 89 97 02 c1 87 f1 |...>K.S:.e......|
00000310 67 d0 f2 06 28 4e 51 4e fd f0 01 47 e7 c9 d9 23 |g...(NQN...G...#|
00000320 21 6b 87 d2 55 e3 c9 f7 eb 86 d5 1e 50 df d5 14 |!k..U.......P...|
00000330 03 01 00 01 01 16 03 01 00 24 95 62 42 be 90 39 |.........$.bB..9|
00000340 68 ae f5 77 47 21 14 b9 ac ee 81 2d e3 9e c7 34 |h..wG!.....-...4|
00000350 3a 00 5c c9 12 1d c0 5a 7c e7 ef e0 cd fd |:.\....Z|.....|
>>> Flow 4 (server to client)
00000000 14 03 01 00 01 01 16 03 01 00 24 ea 98 c0 fb 86 |..........$.....|
00000010 87 7a 2e e1 c7 68 61 3e 5b cc da 1f d6 7b ab 5a |.z...ha>[....{.Z|
00000020 a0 ae a2 cf d0 54 44 19 12 db 75 2b 8c 73 8c |.....TD...u+.s.|
>>> Flow 5 (client to server)
00000000 17 03 01 00 1a f3 28 77 31 33 4c b3 7c 4b 75 61 |......(w13L.|Kua|
00000010 38 69 6b ae c9 36 ab 2e 56 16 29 6a 9a 00 2f 15 |8ik..6..V.)j../.|
00000020 03 01 00 16 6b ed 68 18 ed ff 44 39 9b 4a e4 a2 |....k.h...D9.J..|
00000030 cd 79 ef 2a 3e 5a 4d b1 5d 56 |.y.*>ZM.]V|
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