ForceTLS: hash hostnames, handle subdomains, canonicalise.

It turns out that JSON[Reader|Writer] cannot handle periods in key
names(!). Because of this, an also to avoid leaking a sort of ForceTLS
browser history in the state file, we hash the domain names.

Also, this patch tries to implement the RFCs with respect to
canonicalising the names. Since IDN processing has already occured by
the time the name reaches us, there's only so much that we can do
however.

http://codereview.chromium.org/201033


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@25696 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 25 insertions, 0 deletions

diff --git a/net/base/dns_util.h b/net/base/dns_util.h
new file mode 100644
index 0000000..8eb98f2
--- /dev/null
+++ b/net/base/dns_util.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_BASE_DNS_UTIL_H_
+#define NET_BASE_DNS_UTIL_H_
+
+#include <string>
+
+namespace net {
+
+// DNSDomainFromDot - convert a domain string to DNS format. From DJB's
+// public domain DNS library.
+//
+//   dotted: a string in dotted form: "www.google.com"
+//   out: a result in DNS form: "\x03www\x06google\x03com\x00"
+bool DNSDomainFromDot(const std::string& dotted, std::string* out);
+
+// Returns true iff the given character is in the set of valid DNS label
+// characters as given in RFC 3490, 4.1, 3(a)
+bool IsSTD3ASCIIValidCharacter(char c);
+
+}  // namespace net
+
+#endif  // NET_BASE_DNS_UTIL_H_