From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 .../vmime/security/sasl/builtinSASLMechanism.cpp   | 221 +++++++++++++++++++++
 1 file changed, 221 insertions(+)
 create mode 100644 vmime-master/src/vmime/security/sasl/builtinSASLMechanism.cpp

(limited to 'vmime-master/src/vmime/security/sasl/builtinSASLMechanism.cpp')

diff --git a/vmime-master/src/vmime/security/sasl/builtinSASLMechanism.cpp b/vmime-master/src/vmime/security/sasl/builtinSASLMechanism.cpp
new file mode 100644
index 0000000..846e2cc
--- /dev/null
+++ b/vmime-master/src/vmime/security/sasl/builtinSASLMechanism.cpp
@@ -0,0 +1,221 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
+//
+// 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 3 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.,
+// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library.  Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#include "vmime/config.hpp"
+
+
+#if VMIME_HAVE_MESSAGING_FEATURES && VMIME_HAVE_SASL_SUPPORT
+
+
+#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(
+	const shared_ptr <SASLContext>& ctx,
+	const string& name
+)
+	: m_context(ctx),
+	  m_name(name),
+	  m_complete(false) {
+
+}
+
+
+builtinSASLMechanism::~builtinSASLMechanism() {
+
+}
+
+
+const string builtinSASLMechanism::getName() const {
+
+	return m_name;
+}
+
+
+bool builtinSASLMechanism::step(
+	const shared_ptr <SASLSession>& sess,
+	const byte_t* challenge,
+	const size_t challengeLen,
+	byte_t** response,
+	size_t* 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_t* res = new byte_t[outputLen];
+
+		for (size_t i = 0 ; i < outputLen ; ++i) {
+			res[i] = output[i];
+		}
+
+		*response = res;
+		*responseLen = outputLen;
+
+		gsasl_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)
+		);
+	}
+}
+
+
+bool builtinSASLMechanism::isComplete() const {
+
+	return m_complete;
+}
+
+
+bool builtinSASLMechanism::hasInitialResponse() const {
+
+	// It seems GNU SASL does not support initial response
+	return false;
+}
+
+
+void builtinSASLMechanism::encode(
+	const shared_ptr <SASLSession>& sess,
+	const byte_t* input,
+	const size_t inputLen,
+	byte_t** output,
+	size_t* 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_t* res = new byte_t[coutputLen];
+
+		std::copy(coutput, coutput + coutputLen, res);
+
+		*output = res;
+		*outputLen = static_cast <int>(coutputLen);
+
+	} catch (...) {
+
+		gsasl_free(coutput);
+		throw;
+	}
+
+	gsasl_free(coutput);
+}
+
+
+void builtinSASLMechanism::decode(
+	const shared_ptr <SASLSession>& sess,
+	const byte_t* input,
+	const size_t inputLen,
+	byte_t** output,
+	size_t* 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_t* res = new byte_t[coutputLen];
+
+		std::copy(coutput, coutput + coutputLen, res);
+
+		*output = res;
+		*outputLen = static_cast <int>(coutputLen);
+
+	} catch (...) {
+
+		gsasl_free(coutput);
+		throw;
+	}
+
+	gsasl_free(coutput);
+}
+
+
+} // sasl
+} // security
+} // vmime
+
+
+#endif // VMIME_HAVE_MESSAGING_FEATURES && VMIME_HAVE_SASL_SUPPORT
-- 
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