1 files changed, 88 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/tls/tls_version.cpp b/comm/third_party/botan/src/lib/tls/tls_version.cpp
new file mode 100644
index 0000000000..ecbe94897a
--- /dev/null
+++ b/comm/third_party/botan/src/lib/tls/tls_version.cpp
@@ -0,0 +1,88 @@
+/*
+* TLS Protocol Version Management
+* (C) 2012 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/tls_version.h>
+#include <botan/tls_exceptn.h>
+
+namespace Botan {
+
+namespace TLS {
+
+std::string Protocol_Version::to_string() const
+   {
+   const uint8_t maj = major_version();
+   const uint8_t min = minor_version();
+
+   if(maj == 3 && min == 0)
+      return "SSL v3";
+
+   if(maj == 3 && min >= 1) // TLS v1.x
+      return "TLS v1." + std::to_string(min-1);
+
+   if(maj == 254) // DTLS 1.x
+      return "DTLS v1." + std::to_string(255 - min);
+
+   // Some very new or very old protocol (or bogus data)
+   return "Unknown " + std::to_string(maj) + "." + std::to_string(min);
+   }
+
+bool Protocol_Version::is_datagram_protocol() const
+   {
+   return major_version() > 250;
+   }
+
+bool Protocol_Version::operator>(const Protocol_Version& other) const
+   {
+   if(this->is_datagram_protocol() != other.is_datagram_protocol())
+      throw TLS_Exception(Alert::PROTOCOL_VERSION,
+                          "Version comparing " + to_string() +
+                          " with " + other.to_string());
+
+   if(this->is_datagram_protocol())
+      return m_version < other.m_version; // goes backwards
+
+   return m_version > other.m_version;
+   }
+
+bool Protocol_Version::known_version() const
+   {
+   return (m_version == Protocol_Version::TLS_V10 ||
+           m_version == Protocol_Version::TLS_V11 ||
+           m_version == Protocol_Version::TLS_V12 ||
+           m_version == Protocol_Version::DTLS_V10 ||
+           m_version == Protocol_Version::DTLS_V12);
+   }
+
+bool Protocol_Version::supports_negotiable_signature_algorithms() const
+   {
+   return (m_version != Protocol_Version::TLS_V10 &&
+           m_version != Protocol_Version::TLS_V11 &&
+           m_version != Protocol_Version::DTLS_V10);
+   }
+
+bool Protocol_Version::supports_explicit_cbc_ivs() const
+   {
+   return (m_version != Protocol_Version::TLS_V10);
+   }
+
+bool Protocol_Version::supports_ciphersuite_specific_prf() const
+   {
+   return (m_version != Protocol_Version::TLS_V10 &&
+           m_version != Protocol_Version::TLS_V11 &&
+           m_version != Protocol_Version::DTLS_V10);
+   }
+
+bool Protocol_Version::supports_aead_modes() const
+   {
+   return (m_version != Protocol_Version::TLS_V10 &&
+           m_version != Protocol_Version::TLS_V11 &&
+           m_version != Protocol_Version::DTLS_V10);
+   }
+
+}
+
+}