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// SslContext.cpp
// Implements the cSslContext class that holds everything a single SSL context needs to function
#include "Globals.h"
#include "../mbedTLS++/SslContext.h"
#include "../mbedTLS++/SslConfig.h"
cSslContext::cSslContext(void) :
m_IsValid(false),
m_HasHandshaken(false)
{
mbedtls_ssl_init(&m_Ssl);
}
cSslContext::~cSslContext()
{
mbedtls_ssl_free(&m_Ssl);
}
int cSslContext::Initialize(std::shared_ptr<const cSslConfig> a_Config)
{
// Check double-initialization:
if (m_IsValid)
{
LOGWARNING("SSL: Double initialization is not supported.");
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA; // There is no return value well-suited for this, reuse this one.
}
// Check the Config:
m_Config = std::move(a_Config);
if (m_Config == nullptr)
{
ASSERT(!"Config must not be nullptr");
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
// Apply the configuration to the ssl context
int res = mbedtls_ssl_setup(&m_Ssl, m_Config->GetInternal());
if (res != 0)
{
return res;
}
// Set the io callbacks
mbedtls_ssl_set_bio(&m_Ssl, this, SendEncrypted, ReceiveEncrypted, nullptr);
m_IsValid = true;
return 0;
}
int cSslContext::Initialize(bool a_IsClient)
{
if (a_IsClient)
{
return Initialize(cSslConfig::GetDefaultClientConfig());
}
else
{
return Initialize(cSslConfig::GetDefaultServerConfig());
}
}
void cSslContext::SetExpectedPeerName(const std::string_view a_ExpectedPeerName)
{
ASSERT(m_IsValid); // Call Initialize() first
mbedtls_ssl_set_hostname(&m_Ssl, a_ExpectedPeerName.data());
}
int cSslContext::WritePlain(const void * a_Data, size_t a_NumBytes)
{
ASSERT(m_IsValid); // Need to call Initialize() first
if (!m_HasHandshaken)
{
int res = Handshake();
if (res != 0)
{
return res;
}
}
return mbedtls_ssl_write(&m_Ssl, static_cast<const unsigned char *>(a_Data), a_NumBytes);
}
int cSslContext::ReadPlain(void * a_Data, size_t a_MaxBytes)
{
ASSERT(m_IsValid); // Need to call Initialize() first
if (!m_HasHandshaken)
{
int res = Handshake();
if (res != 0)
{
return res;
}
}
return mbedtls_ssl_read(&m_Ssl, static_cast<unsigned char *>(a_Data), a_MaxBytes);
}
int cSslContext::Handshake(void)
{
ASSERT(m_IsValid); // Need to call Initialize() first
ASSERT(!m_HasHandshaken); // Must not call twice
int res = mbedtls_ssl_handshake(&m_Ssl);
if (res == 0)
{
m_HasHandshaken = true;
}
return res;
}
int cSslContext::NotifyClose(void)
{
return mbedtls_ssl_close_notify(&m_Ssl);
}
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