Move lib into src

1 files changed, 69 insertions, 0 deletions

diff --git a/src/lib/tls/msg_hello_verify.cpp b/src/lib/tls/msg_hello_verify.cpp
new file mode 100644
index 000000000..f8a117c03
--- /dev/null
+++ b/src/lib/tls/msg_hello_verify.cpp
@@ -0,0 +1,69 @@
+/*
+* DTLS Hello Verify Request
+* (C) 2012 Jack Lloyd
+*
+* Released under the terms of the Botan license
+*/
+
+#include <botan/internal/tls_messages.h>
+#include <botan/lookup.h>
+#include <memory>
+
+namespace Botan {
+
+namespace TLS {
+
+Hello_Verify_Request::Hello_Verify_Request(const std::vector<byte>& buf)
+   {
+   if(buf.size() < 3)
+      throw Decoding_Error("Hello verify request too small");
+
+   Protocol_Version version(buf[0], buf[1]);
+
+   if(version != Protocol_Version::DTLS_V10 &&
+      version != Protocol_Version::DTLS_V12)
+      {
+      throw Decoding_Error("Unknown version from server in hello verify request");
+      }
+
+   if(static_cast<size_t>(buf[2]) + 3 != buf.size())
+      throw Decoding_Error("Bad length in hello verify request");
+
+   m_cookie.assign(&buf[3], &buf[buf.size()]);
+   }
+
+Hello_Verify_Request::Hello_Verify_Request(const std::vector<byte>& client_hello_bits,
+                                           const std::string& client_identity,
+                                           const SymmetricKey& secret_key)
+   {
+   std::unique_ptr<MessageAuthenticationCode> hmac(get_mac("HMAC(SHA-256)"));
+   hmac->set_key(secret_key);
+
+   hmac->update_be(client_hello_bits.size());
+   hmac->update(client_hello_bits);
+   hmac->update_be(client_identity.size());
+   hmac->update(client_identity);
+
+   m_cookie = unlock(hmac->final());
+   }
+
+std::vector<byte> Hello_Verify_Request::serialize() const
+   {
+   /* DTLS 1.2 server implementations SHOULD use DTLS version 1.0
+      regardless of the version of TLS that is expected to be
+      negotiated (RFC 6347, section 4.2.1)
+   */
+
+   Protocol_Version format_version(Protocol_Version::DTLS_V10);
+
+   std::vector<byte> bits;
+   bits.push_back(format_version.major_version());
+   bits.push_back(format_version.minor_version());
+   bits.push_back(static_cast<byte>(m_cookie.size()));
+   bits += m_cookie;
+   return bits;
+   }
+
+}
+
+}