Fail the SPDY transaction if it does not meet TLS base requirements.

* Generally follows guidelines in https://http2.github.io/http2-spec/#TLSUsage.
* Apply only to SPDY4+ versions
* Fail the stream job if the TLS version for SPDY is too old (<1.2)
* Fail the stream job if the TLS cipher suite is sucky. Note that we're stricter here than the HTTP/2 spec.

Also added while implementing this CL:
* Add SSLConnectionStatus setters.
* Add ability for SSLSocketDataProvider to set SSLConnectionStatus.
* Add modern cipher suite check into net/ssl.

BUG=374957

Review URL: https://codereview.chromium.org/291093002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@272467 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 45 insertions, 0 deletions

diff --git a/net/ssl/ssl_cipher_suite_names.cc b/net/ssl/ssl_cipher_suite_names.cc
index f018857..55b0276 100644
--- a/net/ssl/ssl_cipher_suite_names.cc
+++ b/net/ssl/ssl_cipher_suite_names.cc
@@ -345,4 +345,49 @@ bool ParseSSLCipherString(const std::string& cipher_string,
   return false;
 }
 
+bool IsSecureTLSCipherSuite(uint16 cipher_suite) {
+  CipherSuite desired = {0};
+  desired.cipher_suite = cipher_suite;
+
+  void* r = bsearch(&desired,
+                    kCipherSuites,
+                    arraysize(kCipherSuites),
+                    sizeof(kCipherSuites[0]),
+                    CipherSuiteCmp);
+
+  if (!r)
+    return false;
+
+  const CipherSuite* cs = static_cast<const CipherSuite*>(r);
+
+  const int key_exchange = cs->encoded >> 8;
+  const int cipher = (cs->encoded >> 3) & 0x1f;
+  const int mac = cs->encoded & 0x7;
+
+  // Only allow forward secure key exchanges.
+  switch (key_exchange) {
+    case 10:  // DHE_RSA
+    case 14:  // ECDHE_ECDSA
+    case 16:  // ECDHE_RSA
+      break;
+    default:
+      return false;
+  }
+
+  switch (cipher) {
+    case 13:  // AES_128_GCM
+    case 14:  // AES_256_GCM
+    case 17:  // CHACHA20_POLY1305
+      break;
+    default:
+      return false;
+  }
+
+  // Only AEADs allowed.
+  if (mac != kAEADMACValue)
+    return false;
+
+  return true;
+}
+
 }  // namespace net