Support ChaCha20+Poly1305 cipher suites.

nss.gyp

Index: nss.gyp
===================================================================
--- nss.gyp	(revision 228205)
+++ nss.gyp	(working copy)
@@ -543,6 +543,10 @@
         'nss/lib/freebl/build_config_mac.h',
         'nss/lib/freebl/camellia.c',
         'nss/lib/freebl/camellia.h',
+        'nss/lib/freebl/chacha20/chacha20.c',
+        'nss/lib/freebl/chacha20/chacha20.h',
+        'nss/lib/freebl/chacha20/chacha20_vec.c',
+        'nss/lib/freebl/chacha20poly1305.c',
         'nss/lib/freebl/ctr.c',
         'nss/lib/freebl/ctr.h',
         'nss/lib/freebl/cts.c',
@@ -600,6 +604,9 @@
         'nss/lib/freebl/mpi/mp_gf2m.c',
         'nss/lib/freebl/mpi/mp_gf2m.h',
         'nss/lib/freebl/mpi/primes.c',
+        'nss/lib/freebl/poly1305/poly1305-donna-x64-sse2-incremental-source.c',
+        'nss/lib/freebl/poly1305/poly1305.c',
+        'nss/lib/freebl/poly1305/poly1305.h',
         'nss/lib/freebl/pqg.c',
         'nss/lib/freebl/pqg.h',
         'nss/lib/freebl/rawhash.c',
@@ -1069,6 +1076,17 @@
             'nss/lib/freebl/mpi/mpi_amd64.c',
           ],
         }],
+        ['target_arch=="x64" and OS!="win"', {

[agl, 2013/10/21 21:53:39]

That's a shame :(

What was the issue? I was hoping that, by avoiding asm code, that it would build
on Windows. If it's just a question of debugging-via-trybot then I think we
should disable the ciphersuites until we have this.

[wtc, 2013/10/22 22:36:42]

I described the issue in another file. In short, chacha20_vec.c uses the GCC
__attribute__ vector_size extension, and
poly1305-donna-x64-sse2-incremental-source.c uses the __int128 type. Both of
them are unavailable in Visual C++.

+          'sources!': [
+            'nss/lib/freebl/chacha20/chacha20.c',
+            'nss/lib/freebl/poly1305/poly1305.c',
+	    ],
+        }, { # else: target_arch!="x64" or OS=="win"
+          'sources!': [
+            'nss/lib/freebl/chacha20/chacha20_vec.c',
+            'nss/lib/freebl/poly1305/poly1305-donna-x64-sse2-incremental-source.c',
+	    ],
+        }],
         ['OS=="mac" or OS=="ios"', {
           'defines': [
             'XP_UNIX',