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//
// 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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