error_t sslClientTest(void)
{
error_t error;
size_t length;
IpAddr ipAddr;
static char_t buffer[256];
//Underlying socket
Socket *socket = NULL;
//SSL/TLS context
TlsContext *tlsContext = NULL;
//Debug message
TRACE_INFO("Resolving server name...\r\n");
//Resolve SSL server name
error = getHostByName(NULL, APP_SERVER_NAME, &ipAddr, 0);
//Any error to report?
if(error)
{
//Debug message
TRACE_INFO("Failed to resolve server name!\r\n");
//Exit immediately
return error;
}
//Create a new socket to handle the request
socket = socketOpen(SOCKET_TYPE_STREAM, SOCKET_IP_PROTO_TCP);
//Any error to report?
if(!socket)
{
//Debug message
TRACE_INFO("Failed to open socket!\r\n");
//Exit immediately
return ERROR_OPEN_FAILED;
}
//Start of exception handling block
do
{
//Debug message
TRACE_INFO("Connecting to SSL server %s\r\n", ipAddrToString(&ipAddr, NULL));
//Connect to the SSL server
error = socketConnect(socket, &ipAddr, APP_SERVER_PORT);
//Any error to report?
if(error) break;
//Initialize SSL/TLS context
tlsContext = tlsInit();
//Initialization failed?
if(!tlsContext)
{
//Report an error
error = ERROR_OUT_OF_MEMORY;
//Exit immediately
break;
}
//Bind TLS to the relevant socket
error = tlsSetSocket(tlsContext, socket);
//Any error to report?
if(error) break;
//Select client operation mode
error = tlsSetConnectionEnd(tlsContext, TLS_CONNECTION_END_CLIENT);
//Any error to report?
if(error) break;
//Set the PRNG algorithm to be used
error = tlsSetPrng(tlsContext, YARROW_PRNG_ALGO, &yarrowContext);
//Any error to report?
if(error) break;
#if (APP_SET_CIPHER_SUITES == ENABLED)
//Preferred cipher suite list
error = tlsSetCipherSuites(tlsContext, cipherSuites, arraysize(cipherSuites));
//Any error to report?
if(error) break;
#endif
#if (APP_SET_SERVER_NAME == ENABLED)
//Set the fully qualified domain name of the server
error = tlsSetServerName(tlsContext, APP_SERVER_NAME);
//Any error to report?
if(error) break;
#endif
#if (APP_SET_TRUSTED_CA_LIST == ENABLED)
//Import the list of trusted CA certificates
error = tlsSetTrustedCaList(tlsContext, trustedCaList, trustedCaListLength);
//Any error to report?
if(error) break;
#endif
#if (APP_SET_CLIENT_CERT == ENABLED)
//Import the client's certificate
error = tlsAddCertificate(tlsContext, clientCert,
clientCertLength, clientPrivateKey, clientPrivateKeyLength);
//Any error to report?
if(error) break;
#endif
//Establish a secure session
error = tlsConnect(tlsContext);
//TLS handshake failure?
if(error) break;
//Format HTTP request
sprintf(buffer, "GET %s HTTP/1.0\r\nHost: %s:%u\r\n\r\n",
APP_REQUEST_URI, APP_SERVER_NAME, APP_SERVER_PORT);
//Debug message
TRACE_INFO("\r\n");
TRACE_INFO("HTTP request:\r\n%s", buffer);
//Send the request
error = tlsWrite(tlsContext, buffer, strlen(buffer), 0);
//Any error to report?
if(error) break;
//Debug message
TRACE_INFO("HTTP response:\r\n");
//Read the whole response
while(1)
{
//Read data
error = tlsRead(tlsContext, buffer, sizeof(buffer) - 1, &length, 0);
//End of stream?
if(error) break;
//Properly terminate the string with a NULL character
buffer[length] = '\0';
//Debug message
TRACE_INFO("%s", buffer);
}
//Successfull processing
error = NO_ERROR;
//End of exception handling block
} while(0);
//Any error to report?
if(error)
{
//Debug message
TRACE_INFO("Failed to communicate with SSL server!\r\n");
}
//Terminate TLS session
tlsFree(tlsContext);
//Close socket
socketClose(socket);
//Debug message
TRACE_INFO("Connection closed...\r\n");
//Return status code
return error;
}
int_t main(void)
{
error_t error;
size_t length;
int_t ret;
WSADATA wsaData;
HOSTENT *host;
SOCKADDR_IN addr;
HCRYPTPROV hProvider;
YarrowContext yarrowContext;
char_t buffer[512];
uint8_t seed[32];
//Socket descriptor
SOCKET sock = SOCKET_ERROR;
//SSL/TLS context
TlsContext *tlsContext = NULL;
//Credentials
char_t *clientCert = NULL;
size_t clientCertLength = 0;
char_t *clientPrivateKey = NULL;
size_t clientPrivateKeyLength = 0;
char_t *trustedCaList = NULL;
size_t trustedCaListLength = 0;
//Start-up message
TRACE_INFO("******************************\r\n");
TRACE_INFO("*** CycloneSSL Client Demo ***\r\n");
TRACE_INFO("******************************\r\n");
TRACE_INFO("\r\n");
//Acquire cryptographic context
ret = CryptAcquireContext(&hProvider, 0, 0, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT);
//Any error to report?
if(!ret)
{
//Debug message
TRACE_ERROR("Error: Cannot acquire cryptographic context (%d)\r\n", GetLastError());
//Exit immediately
return ERROR_FAILURE;
}
//Generate a random seed
ret = CryptGenRandom(hProvider, sizeof(seed), seed);
//Any error to report?
if(!ret)
{
//Debug message
TRACE_ERROR("Error: Failed to generate random data (%d)\r\n", GetLastError());
//Exit immediately
return ERROR_FAILURE;
}
//Release cryptographic context
CryptReleaseContext(hProvider, 0);
//PRNG initialization
error = yarrowInit(&yarrowContext);
//Any error to report?
if(error)
{
//Debug message
TRACE_ERROR("Error: PRNG initialization failed (%d)\r\n", error);
//Exit immediately
return ERROR_FAILURE;
}
//Properly seed the PRNG
error = yarrowSeed(&yarrowContext, seed, sizeof(seed));
//Any error to report?
if(error)
{
//Debug message
TRACE_ERROR("Error: Failed to seed PRNG (%d)\r\n", error);
//Exit immediately
return error;
}
//Winsock initialization
ret = WSAStartup(MAKEWORD(2, 2), &wsaData);
//Any error to report?
if(ret)
{
//Debug message
TRACE_ERROR("Error: Winsock initialization failed (%d)\r\n", ret);
//Exit immediately
return ERROR_FAILURE;
}
//Start of exception handling block
do
{
//Debug message
TRACE_INFO("Loading credentials...\r\n");
//Load trusted CA certificates
error = readPemFile(APP_CA_CERT_BUNDLE, &trustedCaList, &trustedCaListLength);
//Any error to report?
if(error) break;
//Load client's certificate
error = readPemFile(APP_CLIENT_CERT, &clientCert, &clientCertLength);
//Any error to report?
if(error) break;
//Load client's private key
error = readPemFile(APP_CLIENT_PRIVATE_KEY, &clientPrivateKey, &clientPrivateKeyLength);
//Any error to report?
if(error) break;
//Debug message
TRACE_INFO("Trying to resolve %s...\r\n", APP_SERVER_NAME);
//Resolve server name
host = gethostbyname(APP_SERVER_NAME);
//Failed to resolve server name?
if(!host)
{
//Debug message
TRACE_ERROR("Error: Cannot resolve server name (%d)\r\n", WSAGetLastError());
//Report an error
error = ERROR_FAILURE;
//Exit immediately
break;
}
//Open a socket
sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
//Failed to open socket?
if(sock < 0)
{
//Debug message
TRACE_ERROR("Error: Cannot open socket (%d)\r\n", WSAGetLastError());
//Report an error
error = ERROR_FAILURE;
//Exit immediately
break;
}
//Destination address
addr.sin_family = host->h_addrtype;
memcpy(&addr.sin_addr, host->h_addr, host->h_length);
addr.sin_port = htons(APP_SERVER_PORT);
//Connect to the SSL server
ret = connect(sock, (PSOCKADDR) &addr, sizeof(addr));
//Connection with server failed?
if(ret < 0)
{
//Debug message
TRACE_ERROR("Error: Failed to connect (%d)\r\n", WSAGetLastError());
//Report an error
error = ERROR_FAILURE;
//Exit immediately
break;
}
//Initialize SSL/TLS context
tlsContext = tlsInit();
//Initialization failed?
if(!tlsContext)
{
//Report an error
error = ERROR_OUT_OF_MEMORY;
//Exit immediately
break;
}
//Bind TLS to the relevant socket
error = tlsSetSocket(tlsContext, sock);
//Any error to report?
if(error) break;
//Select client operation mode
error = tlsSetConnectionEnd(tlsContext, TLS_CONNECTION_END_CLIENT);
//Any error to report?
if(error) break;
//Set the PRNG algorithm to be used
error = tlsSetPrng(tlsContext, YARROW_PRNG_ALGO, &yarrowContext);
//Any error to report?
if(error) break;
#if (APP_SET_CIPHER_SUITES == ENABLED)
//Preferred cipher suite list
error = tlsSetCipherSuites(tlsContext, cipherSuites, arraysize(cipherSuites));
//Any error to report?
if(error) break;
#endif
#if (APP_SET_SERVER_NAME == ENABLED)
//Set the fully qualified domain name of the server
error = tlsSetServerName(tlsContext, APP_SERVER_NAME);
//Any error to report?
if(error) break;
#endif
#if (APP_SET_TRUSTED_CA_LIST == ENABLED)
//Import the list of trusted CA certificates
error = tlsSetTrustedCaList(tlsContext, trustedCaList, trustedCaListLength);
//Any error to report?
if(error) break;
#endif
#if (APP_SET_CLIENT_CERT == ENABLED)
//Import the client's certificate
error = tlsAddCertificate(tlsContext, clientCert,
clientCertLength, clientPrivateKey, clientPrivateKeyLength);
//Any error to report?
if(error) break;
#endif
//Establish a secure session
error = tlsConnect(tlsContext);
//TLS handshake failure?
if(error) break;
//Format HTTP request
sprintf(buffer, "GET %s HTTP/1.0\r\nHost: %s:%u\r\n\r\n",
APP_REQUEST_URI, APP_SERVER_NAME, APP_SERVER_PORT);
//Debug message
TRACE_INFO("\r\n");
TRACE_INFO("HTTP request:\r\n%s", buffer);
//Send the request
error = tlsWrite(tlsContext, buffer, strlen(buffer), 0);
//Any error to report?
if(error) break;
//Debug message
TRACE_INFO("HTTP response:\r\n");
//Read the whole response
while(1)
{
//Read data
error = tlsRead(tlsContext, buffer, sizeof(buffer) - 1, &length, 0);
//End of stream?
if(error) break;
//Properly terminate the string with a NULL character
buffer[length] = '\0';
//Debug message
TRACE_INFO("%s", buffer);
}
//Successfull processing
error = NO_ERROR;
//End of exception handling block
} while(0);
//Terminate TLS session
tlsFree(tlsContext);
//Close socket if necessary
if(sock >= 0)
closesocket(sock);
//Free previously allocated resources
free(trustedCaList);
free(clientCert);
free(clientPrivateKey);
//Release PRNG context
yarrowRelease(&yarrowContext);
//Winsock related cleanup
WSACleanup();
//Dumps all the memory blocks in the heap when a memory leak has occurred
_CrtDumpMemoryLeaks();
//Wait for the user to press a key
system("pause");
//Return status code
return error;
}