/*
* Send the initial client hello.
*/
static int send_client_hello(SSL *ssl)
{
uint8_t *buf = ssl->bm_data;
#if defined(CONFIG_PLATFORM_ESP8266)
time_t tm = rand();
#else
time_t tm = time(NULL);
#endif
uint8_t *tm_ptr = &buf[6]; /* time will go here */
int i, offset;
buf[0] = HS_CLIENT_HELLO;
buf[1] = 0;
buf[2] = 0;
/* byte 3 is calculated later */
buf[4] = 0x03;
buf[5] = ssl->version & 0x0f;
/* client random value - spec says that 1st 4 bytes are big endian time */
*tm_ptr++ = (uint8_t)(((long)tm & 0xff000000) >> 24);
*tm_ptr++ = (uint8_t)(((long)tm & 0x00ff0000) >> 16);
*tm_ptr++ = (uint8_t)(((long)tm & 0x0000ff00) >> 8);
*tm_ptr++ = (uint8_t)(((long)tm & 0x000000ff));
get_random(SSL_RANDOM_SIZE-4, &buf[10]);
memcpy(ssl->dc->client_random, &buf[6], SSL_RANDOM_SIZE);
offset = 6 + SSL_RANDOM_SIZE;
/* give session resumption a go */
if (IS_SET_SSL_FLAG(SSL_SESSION_RESUME)) /* set initially by user */
{
buf[offset++] = ssl->sess_id_size;
memcpy(&buf[offset], ssl->session_id, ssl->sess_id_size);
offset += ssl->sess_id_size;
CLR_SSL_FLAG(SSL_SESSION_RESUME); /* clear so we can set later */
}
else
{
/* no session id - because no session resumption just yet */
buf[offset++] = 0;
}
buf[offset++] = 0; /* number of ciphers */
buf[offset++] = NUM_PROTOCOLS*2;/* number of ciphers */
/* put all our supported protocols in our request */
for (i = 0; i < NUM_PROTOCOLS; i++)
{
buf[offset++] = 0; /* cipher we are using */
buf[offset++] = ssl_prot_prefs[i];
}
buf[offset++] = 1; /* no compression */
buf[offset++] = 0;
buf[3] = offset - 4; /* handshake size */
return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, offset);
}
/*
* Send the initial client hello.
*/
static int send_client_hello(SSL *ssl)
{
uint8_t *buf = ssl->bm_data;
time_t tm = time(NULL);
uint8_t *tm_ptr = &buf[6]; /* time will go here */
int i, offset;
buf[0] = HS_CLIENT_HELLO;
buf[1] = 0;
buf[2] = 0;
/* byte 3 is calculated later */
buf[4] = 0x03;
buf[5] = ssl->version & 0x0f;
/* client random value - spec says that 1st 4 bytes are big endian time */
*tm_ptr++ = (uint8_t)(((long)tm & 0xff000000) >> 24);
*tm_ptr++ = (uint8_t)(((long)tm & 0x00ff0000) >> 16);
*tm_ptr++ = (uint8_t)(((long)tm & 0x0000ff00) >> 8);
*tm_ptr++ = (uint8_t)(((long)tm & 0x000000ff));
get_random(SSL_RANDOM_SIZE-4, &buf[10]);
memcpy(ssl->dc->client_random, &buf[6], SSL_RANDOM_SIZE);
offset = 6 + SSL_RANDOM_SIZE;
/* give session resumption a go */
if (IS_SET_SSL_FLAG(SSL_SESSION_RESUME)) /* set initially by user */
{
buf[offset++] = ssl->sess_id_size;
memcpy(&buf[offset], ssl->session_id, ssl->sess_id_size);
offset += ssl->sess_id_size;
CLR_SSL_FLAG(SSL_SESSION_RESUME); /* clear so we can set later */
}
else
{
/* no session id - because no session resumption just yet */
buf[offset++] = 0;
}
buf[offset++] = 0; /* number of ciphers */
buf[offset++] = NUM_PROTOCOLS*2;/* number of ciphers */
/* put all our supported protocols in our request */
for (i = 0; i < NUM_PROTOCOLS; i++)
{
buf[offset++] = 0; /* cipher we are using */
buf[offset++] = ssl_prot_prefs[i];
}
buf[offset++] = 1; /* no compression */
buf[offset++] = 0;
#ifdef CONFIG_SSL_SNI
if (ssl->host_name[0] != 0) {
const char * end = (const char *) memchr((char*) ssl->host_name, '\0', 255);
unsigned int host_len = end == NULL ? 255 : end - (char*) ssl->host_name;
buf[offset++] = 0;
buf[offset++] = host_len+9; /* extensions length */
buf[offset++] = 0;
buf[offset++] = 0; /* server_name(0) (65535) */
buf[offset++] = 0;
buf[offset++] = host_len+5; /* server_name length */
buf[offset++] = 0;
buf[offset++] = host_len+3; /* server_list length */
buf[offset++] = 0; /* host_name(0) (255) */
buf[offset++] = 0;
buf[offset++] = host_len; /* host_name length */
strncpy((char*) &buf[offset], ssl->host_name, host_len);
offset += host_len;
}
#endif
buf[3] = offset - 4; /* handshake size */
return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, offset);
}
