1 files changed, 100 insertions, 0 deletions
diff --git a/src/tls/finished.cpp b/src/tls/finished.cpp
new file mode 100644
index 000000000..d76fbd884
--- /dev/null
+++ b/src/tls/finished.cpp
@@ -0,0 +1,100 @@
+/*
+* Finished Message
+* (C) 2004-2006 Jack Lloyd
+*
+* Released under the terms of the Botan license
+*/
+
+#include <botan/internal/tls_messages.h>
+#include <botan/prf_tls.h>
+
+namespace Botan {
+
+/**
+* Create a new Finished message
+*/
+Finished::Finished(Record_Writer& writer,
+                   Version_Code version, Connection_Side side,
+                   const MemoryRegion<byte>& master_secret,
+                   HandshakeHash& hash)
+   {
+   verification_data = compute_verify(master_secret, hash, side, version);
+   send(writer, hash);
+   }
+
+/**
+* Serialize a Finished message
+*/
+SecureVector<byte> Finished::serialize() const
+   {
+   return verification_data;
+   }
+
+/**
+* Deserialize a Finished message
+*/
+void Finished::deserialize(const MemoryRegion<byte>& buf)
+   {
+   verification_data = buf;
+   }
+
+/**
+* Verify a Finished message
+*/
+bool Finished::verify(const MemoryRegion<byte>& secret, Version_Code version,
+                      const HandshakeHash& hash, Connection_Side side)
+   {
+   SecureVector<byte> computed = compute_verify(secret, hash, side, version);
+   if(computed == verification_data)
+      return true;
+   return false;
+   }
+
+/**
+* Compute the verify_data
+*/
+SecureVector<byte> Finished::compute_verify(const MemoryRegion<byte>& secret,
+                                            HandshakeHash hash,
+                                            Connection_Side side,
+                                            Version_Code version)
+   {
+   if(version == SSL_V3)
+      {
+      const byte SSL_CLIENT_LABEL[] = { 0x43, 0x4C, 0x4E, 0x54 };
+      const byte SSL_SERVER_LABEL[] = { 0x53, 0x52, 0x56, 0x52 };
+
+      SecureVector<byte> ssl3_finished;
+
+      if(side == CLIENT)
+         hash.update(SSL_CLIENT_LABEL, sizeof(SSL_CLIENT_LABEL));
+      else
+         hash.update(SSL_SERVER_LABEL, sizeof(SSL_SERVER_LABEL));
+
+      return hash.final_ssl3(secret);
+      }
+   else if(version == TLS_V10 || version == TLS_V11)
+      {
+      const byte TLS_CLIENT_LABEL[] = {
+         0x63, 0x6C, 0x69, 0x65, 0x6E, 0x74, 0x20, 0x66, 0x69, 0x6E, 0x69,
+         0x73, 0x68, 0x65, 0x64 };
+
+      const byte TLS_SERVER_LABEL[] = {
+         0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x66, 0x69, 0x6E, 0x69,
+         0x73, 0x68, 0x65, 0x64 };
+
+      TLS_PRF prf;
+
+      SecureVector<byte> input;
+      if(side == CLIENT)
+         input += std::make_pair(TLS_CLIENT_LABEL, sizeof(TLS_CLIENT_LABEL));
+      else
+         input += std::make_pair(TLS_SERVER_LABEL, sizeof(TLS_SERVER_LABEL));
+      input += hash.final();
+
+      return prf.derive_key(12, secret, input);
+      }
+   else
+      throw Invalid_Argument("Finished message: Unknown protocol version");
+   }
+
+}