crypto/tls: advertise support for SHA-512 signatures in 1.2

This is the equivalent change to 1c105980 but for SHA-512.

SHA-512 certificates are already supported by default since b53bb2ca,
but some servers will refuse connections if the algorithm is not
advertised in the overloaded signatureAndHash extension (see 09b238f1).

This required adding support for SHA-512 signatures on CertificateVerify
and ServerKeyExchange messages, because of said overloading.

Some testdata/Client-TLSv1{0,1} files changed because they send a 1.2
ClientHello even if the server picks a lower version.

Closes #22422

Change-Id: I16282d03a3040260d203711ec21e6b20a0e1e105
Reviewed-on: https://go-review.googlesource.com/74950
Run-TryBot: Filippo Valsorda <hi@filippo.io>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Adam Langley <agl@golang.org>

1 files changed, 20 insertions, 20 deletions

diff --git a/src/crypto/tls/testdata/Client-TLSv11-RSA-RC4 b/src/crypto/tls/testdata/Client-TLSv11-RSA-RC4
index 2e9c49e27a..0c8ae3518f 100644
--- a/src/crypto/tls/testdata/Client-TLSv11-RSA-RC4
+++ b/src/crypto/tls/testdata/Client-TLSv11-RSA-RC4
@@ -1,20 +1,20 @@
 >>> Flow 1 (client to server)
-00000000  16 03 01 00 91 01 00 00  8d 03 03 00 00 00 00 00  |................|
+00000000  16 03 01 00 95 01 00 00  91 03 03 00 00 00 00 00  |................|
 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 2c cc a8  |.............,..|
 00000030  cc a9 c0 2f c0 2b c0 30  c0 2c c0 27 c0 13 c0 23  |.../.+.0.,.'...#|
 00000040  c0 09 c0 14 c0 0a 00 9c  00 9d 00 3c 00 2f 00 35  |...........<./.5|
-00000050  c0 12 00 0a 00 05 c0 11  c0 07 01 00 00 38 00 05  |.............8..|
+00000050  c0 12 00 0a 00 05 c0 11  c0 07 01 00 00 3c 00 05  |.............<..|
 00000060  00 05 01 00 00 00 00 00  0a 00 0a 00 08 00 1d 00  |................|
-00000070  17 00 18 00 19 00 0b 00  02 01 00 00 0d 00 0e 00  |................|
-00000080  0c 04 01 04 03 05 01 05  03 02 01 02 03 ff 01 00  |................|
-00000090  01 00 00 12 00 00                                 |......|
+00000070  17 00 18 00 19 00 0b 00  02 01 00 00 0d 00 12 00  |................|
+00000080  10 04 01 04 03 05 01 05  03 06 01 06 03 02 01 02  |................|
+00000090  03 ff 01 00 01 00 00 12  00 00                    |..........|
 >>> Flow 2 (server to client)
-00000000  16 03 02 00 51 02 00 00  4d 03 02 36 8f 18 79 0f  |....Q...M..6..y.|
-00000010  99 6b 3d 1d f4 19 aa ff  79 7c 50 15 52 db 9d c5  |.k=.....y|P.R...|
-00000020  62 40 2d 5b de 45 0c 66  b1 cb be 20 9e 00 c3 00  |b@-[.E.f... ....|
-00000030  22 2f b5 c6 79 c1 f7 72  8f 4b 94 f4 ac fe a9 53  |"/..y..r.K.....S|
-00000040  97 4e fb 00 df 34 b6 24  8f ff 89 db 00 05 00 00  |.N...4.$........|
+00000000  16 03 02 00 51 02 00 00  4d 03 02 17 49 a0 13 8a  |....Q...M...I...|
+00000010  1d 7a e5 dd dd f3 ba 71  8c 9f b9 16 55 98 4e 56  |.z.....q....U.NV|
+00000020  74 da 97 99 09 b7 5a cb  16 17 a8 20 b4 67 96 70  |t.....Z.... .g.p|
+00000030  f5 7c 25 f3 5e 47 6b 38  fb 2a 18 67 a7 35 b6 93  |.|%.^Gk8.*.g.5..|
+00000040  88 26 c7 da 67 7c d7 d9  4d 23 46 15 00 05 00 00  |.&..g|..M#F.....|
 00000050  05 ff 01 00 01 00 16 03  02 02 59 0b 00 02 55 00  |..........Y...U.|
 00000060  02 52 00 02 4f 30 82 02  4b 30 82 01 b4 a0 03 02  |.R..O0..K0......|
 00000070  01 02 02 09 00 e8 f0 9d  3f e2 5b ea a6 30 0d 06  |........?.[..0..|
@@ -64,15 +64,15 @@
 00000060  c5 70 0f 08 83 48 e9 48  ef 6e 50 8b 05 7e e5 84  |.p...H.H.nP..~..|
 00000070  25 fa 55 c7 ae 31 02 27  00 ef 3f 98 86 20 12 89  |%.U..1.'..?.. ..|
 00000080  91 59 28 b4 f7 d7 af d2  69 61 35 14 03 02 00 01  |.Y(.....ia5.....|
-00000090  01 16 03 02 00 24 92 fa  9a bb 9b a3 39 3f 6b 0c  |.....$......9?k.|
-000000a0  70 b5 48 4a fc cf 79 86  c7 90 e8 db ca 6a ff 95  |p.HJ..y......j..|
-000000b0  11 9b 65 b2 07 61 00 a8  dc 14                    |..e..a....|
+00000090  01 16 03 02 00 24 57 25  f5 73 5b e7 e4 e5 41 29  |.....$W%.s[...A)|
+000000a0  0f 6f c5 92 93 17 17 fe  3f 84 cb 62 c0 69 ef ae  |.o......?..b.i..|
+000000b0  c4 96 c7 32 76 b9 fb 2a  01 03                    |...2v..*..|
 >>> Flow 4 (server to client)
-00000000  14 03 02 00 01 01 16 03  02 00 24 47 d5 78 31 32  |..........$G.x12|
-00000010  db db 2b f4 2f e6 a4 fa  fa 04 31 ba c0 bc 86 38  |..+./.....1....8|
-00000020  29 70 53 c6 8c 28 e5 75  90 ed 0f 4f 3e cb 06     |)pS..(.u...O>..|
+00000000  14 03 02 00 01 01 16 03  02 00 24 74 40 46 d2 01  |..........$t@F..|
+00000010  85 de 99 2e 04 b7 c4 a6  50 61 22 01 23 fd 77 be  |........Pa".#.w.|
+00000020  55 6a 6d 1a 79 17 c7 3d  75 64 99 fc bb 42 a7     |Ujm.y..=ud...B.|
 >>> Flow 5 (client to server)
-00000000  17 03 02 00 1a f3 e7 6c  01 c5 70 c6 69 dd 4f 40  |.......l..p.i.O@|
-00000010  38 c1 b2 d2 28 69 2f 99  b1 bd 71 d0 c2 00 08 15  |8...(i/...q.....|
-00000020  03 02 00 16 4c 44 14 02  8e 46 f8 84 40 f1 3d 6d  |....LD...F..@.=m|
-00000030  f2 01 f6 9d 7a 0b 18 ee  9d 41                    |....z....A|
+00000000  17 03 02 00 1a d0 cc 3e  2e f5 09 1d 14 b6 ec f4  |.......>........|
+00000010  19 64 30 40 eb 86 31 8b  61 fd 94 b5 3a 0c d5 15  |.d0@..1.a...:...|
+00000020  03 02 00 16 f2 d9 24 a4  f7 65 0e 26 1e c0 c9 7d  |......$..e.&...}|
+00000030  5c 57 59 fb 80 fd ab ab  83 e4                    |\WY.......|