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method_tls_tunnel: Revise inner response packet generation

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2020-01-30 14:10:21 +01:00
parent d2a0c034c1
commit 7706e54294
1 changed files with 11 additions and 11 deletions
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22
lib/TTLS/src/Method.cpp
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@ -425,7 +425,9 @@ EapPeerMethodResponseAction eap::method_tls_tunnel::process_request_packet(
m_packet_res.assign(reinterpret_cast<const unsigned char*>(buf_out[0].pvBuffer), reinterpret_cast<const unsigned char*>(buf_out[0].pvBuffer) + buf_out[0].cbBuffer);
if (buf_in[1].BufferType == SECBUFFER_EXTRA) {
// Server appended extra data.
m_sc_queue.assign(reinterpret_cast<const unsigned char*>(pReceivedPacket) + dwReceivedPacketSize - buf_in[1].cbBuffer, reinterpret_cast<const unsigned char*>(pReceivedPacket) + dwReceivedPacketSize);
m_sc_queue.assign(
reinterpret_cast<const unsigned char*>(pReceivedPacket) + dwReceivedPacketSize - buf_in[1].cbBuffer,
reinterpret_cast<const unsigned char*>(pReceivedPacket) + dwReceivedPacketSize);
} else
m_sc_queue.clear();
@ -607,11 +609,7 @@ EapPeerMethodResponseAction eap::method_tls_tunnel::process_request_packet(
else
throw sec_runtime_error(status, __FUNCTION__ " Unexpected Schannel result.");
}
switch (action) {
case EapPeerMethodResponseActionSend: m_packet_res_inner = true ; break;
case EapPeerMethodResponseActionNone: m_packet_res_inner = false; break;
default : throw invalid_argument(string_printf(__FUNCTION__ " Inner method returned an unsupported action (action %u).", action));
}
m_packet_res_inner = action == EapPeerMethodResponseActionSend;
}
return EapPeerMethodResponseActionSend;
} else if (FAILED(status)) {
@ -635,9 +633,10 @@ EapPeerMethodResponseAction eap::method_tls_tunnel::process_request_packet(
if (!(m_sc_ctx.m_attrib & ISC_RET_CONFIDENTIALITY))
throw runtime_error(__FUNCTION__ " Connection is not encrypted.");
EapPeerMethodResponseAction action = EapPeerMethodResponseActionDiscard;
if (m_sc_queue.empty()) {
// No extra data for inner authentication.
return method_tunnel::process_request_packet(NULL, 0);
action = method_tunnel::process_request_packet(NULL, 0);
} else {
// Authenticator sent data for inner authentication. Decrypt it.
@ -652,7 +651,6 @@ EapPeerMethodResponseAction eap::method_tls_tunnel::process_request_packet(
SECURITY_STATUS status = DecryptMessage(m_sc_ctx, &buf_desc, 0, NULL);
if (status == SEC_E_OK) {
// Process data (only the first SECBUFFER_DATA found).
EapPeerMethodResponseAction action = EapPeerMethodResponseActionDiscard;
for (size_t i = 0; i < _countof(buf); i++)
if (buf[i].BufferType == SECBUFFER_DATA) {
action = method_tunnel::process_request_packet(buf[i].pvBuffer, buf[i].cbBuffer);
@ -664,13 +662,13 @@ EapPeerMethodResponseAction eap::method_tls_tunnel::process_request_packet(
for (size_t i = 0; i < _countof(buf); i++)
if (buf[i].BufferType == SECBUFFER_EXTRA)
m_sc_queue.insert(m_sc_queue.end(), reinterpret_cast<const unsigned char*>(buf[i].pvBuffer), reinterpret_cast<const unsigned char*>(buf[i].pvBuffer) + buf[i].cbBuffer);
return action;
} else if (FAILED(status))
throw sec_runtime_error(status, __FUNCTION__ " Schannel error.");
else
throw sec_runtime_error(status, __FUNCTION__ " Unexpected Schannel result.");
}
m_packet_res_inner = action == EapPeerMethodResponseActionSend;
return action;
}
default:
@ -716,7 +714,9 @@ void eap::method_tls_tunnel::get_response_packet(
if (FAILED(status))
throw sec_runtime_error(status, __FUNCTION__ " Error encrypting message.");
m_packet_res.insert(m_packet_res.end(), reinterpret_cast<const unsigned char*>(buf[0].pvBuffer), reinterpret_cast<const unsigned char*>(buf[0].pvBuffer) + buf[0].cbBuffer + buf[1].cbBuffer + buf[2].cbBuffer);
m_packet_res.insert(m_packet_res.end(),
reinterpret_cast<const unsigned char*>(buf[0].pvBuffer),
reinterpret_cast<const unsigned char*>(buf[0].pvBuffer) + buf[0].cbBuffer + buf[1].cbBuffer + buf[2].cbBuffer);
}
} else if (m_packet_res.size() > size_max)
throw invalid_argument(string_printf(__FUNCTION__ " This method does not support packet fragmentation, but the data size is too big to fit in one packet (packet: %zu, maximum: %u).", m_packet_res.size(), size_max));