SASL authentication.

1 files changed, 182 insertions, 0 deletions

diff --git a/src/security/sasl/builtinSASLMechanism.cpp b/src/security/sasl/builtinSASLMechanism.cpp
new file mode 100644
index 00000000..89704eeb
--- /dev/null
+++ b/src/security/sasl/builtinSASLMechanism.cpp
@@ -0,0 +1,182 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002-2005 Vincent Richard <[email protected]>
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+
+#include <gsasl.h>
+
+#include "vmime/security/sasl/builtinSASLMechanism.hpp"
+
+#include "vmime/security/sasl/SASLContext.hpp"
+#include "vmime/security/sasl/SASLSession.hpp"
+
+#include "vmime/exception.hpp"
+
+#include <stdexcept>
+#include <new>
+
+
+namespace vmime {
+namespace security {
+namespace sasl {
+
+
+builtinSASLMechanism::builtinSASLMechanism(ref <SASLContext> ctx, const string& name)
+	: m_context(ctx), m_name(name), m_complete(false)
+{
+}
+
+
+builtinSASLMechanism::~builtinSASLMechanism()
+{
+}
+
+
+const string builtinSASLMechanism::getName() const
+{
+	return m_name;
+}
+
+
+const bool builtinSASLMechanism::step
+	(ref <SASLSession> sess, const byte* challenge, const int challengeLen,
+	 byte** response, int* responseLen)
+{
+	char* output = 0;
+	size_t outputLen = 0;
+
+	const int result = gsasl_step(sess->m_gsaslSession,
+		reinterpret_cast <const char*>(challenge), challengeLen,
+		&output, &outputLen);
+
+	if (result == GSASL_OK || result == GSASL_NEEDS_MORE)
+	{
+		byte* res = new byte[outputLen];
+
+		for (size_t i = 0 ; i < outputLen ; ++i)
+			res[i] = output[i];
+
+		*response = res;
+		*responseLen = outputLen;
+
+		free(output);
+	}
+	else
+	{
+		*response = 0;
+		*responseLen = 0;
+	}
+
+	if (result == GSASL_OK)
+	{
+		// Authentication process completed
+		m_complete = true;
+		return true;
+	}
+	else if (result == GSASL_NEEDS_MORE)
+	{
+		// Continue authentication process
+		return false;
+	}
+	else if (result == GSASL_MALLOC_ERROR)
+	{
+		throw std::bad_alloc();
+	}
+	else
+	{
+		throw exceptions::sasl_exception("Error when processing challenge: "
+			+ SASLContext::getErrorMessage("gsasl_step", result));
+	}
+}
+
+
+const bool builtinSASLMechanism::isComplete() const
+{
+	return m_complete;
+}
+
+
+void builtinSASLMechanism::encode
+	(ref <SASLSession> sess, const byte* input, const int inputLen,
+	 byte** output, int* outputLen)
+{
+	char* coutput = 0;
+	size_t coutputLen = 0;
+
+	if (gsasl_encode(sess->m_gsaslSession,
+		reinterpret_cast <const char*>(input), inputLen,
+		&coutput, &coutputLen) != GSASL_OK)
+	{
+		throw exceptions::sasl_exception("Encoding error.");
+	}
+
+	try
+	{
+		byte* res = new byte[coutputLen];
+
+		std::copy(coutput, coutput + coutputLen, res);
+
+		*output = res;
+		*outputLen = static_cast <int>(coutputLen);
+	}
+	catch (...)
+	{
+		free(coutput);
+		throw;
+	}
+
+	free(coutput);
+}
+
+
+void builtinSASLMechanism::decode
+	(ref <SASLSession> sess, const byte* input, const int inputLen,
+	 byte** output, int* outputLen)
+{
+	char* coutput = 0;
+	size_t coutputLen = 0;
+
+	try
+	{
+		if (gsasl_decode(sess->m_gsaslSession,
+			reinterpret_cast <const char*>(input), inputLen,
+			&coutput, &coutputLen) != GSASL_OK)
+		{
+			throw exceptions::sasl_exception("Decoding error.");
+		}
+
+		byte* res = new byte[coutputLen];
+
+		std::copy(coutput, coutput + coutputLen, res);
+
+		*output = res;
+		*outputLen = static_cast <int>(coutputLen);
+	}
+	catch (...)
+	{
+		free(coutput);
+		throw;
+	}
+
+	free(coutput);
+}
+
+
+} // sasl
+} // security
+} // vmime
+