void
Twitter::compute_authorization(const char *message)
{
char *cp = buffer;
/* Compute key and init HMAC. */
cp = url_encode_pgm(buffer, consumer_secret);
*cp++ = '&';
if (access_token_pgm)
cp = url_encode_pgm(cp, token_secret.pgm);
else
cp = url_encode_eeprom(cp, token_secret.eeprom);
Sha1.initHmac((uint8_t *) buffer, cp - buffer);
auth_add_pgm(PSTR("POST&http%3A%2F%2F"));
auth_add_pgm(server);
url_encode_pgm(buffer, uri);
auth_add(buffer);
auth_add('&');
auth_add_pgm(PSTR("oauth_consumer_key"));
auth_add_value_separator();
url_encode_pgm(buffer, consumer_key);
auth_add(buffer);
cp = hex_encode(buffer, nonce, sizeof(nonce));
auth_add_param(PSTR("oauth_nonce"), buffer, cp + 1);
auth_add_param(PSTR("oauth_signature_method"), "HMAC-SHA1", buffer);
sprintf(buffer, "%ld", timestamp);
auth_add_param(PSTR("oauth_timestamp"), buffer, cp + 1);
auth_add_param_separator();
auth_add_pgm(PSTR("oauth_token"));
auth_add_value_separator();
if (access_token_pgm)
url_encode_pgm(buffer, access_token.pgm);
else
url_encode_eeprom(buffer, access_token.eeprom);
auth_add(buffer);
auth_add_param(PSTR("oauth_version"), "1.0", buffer);
cp = url_encode(buffer, message);
auth_add_param(PSTR("status"), buffer, cp + 1);
signature = Sha1.resultHmac();
}
void
Twitter::auth_add_param(const prog_char key[], const char *value, char *workbuf)
{
/* Add separator. We know that this method is not used to add the
first parameter. */
auth_add_param_separator();
auth_add_pgm(key);
auth_add_value_separator();
url_encode(workbuf, value);
auth_add(workbuf);
}
static void c_add_auth(char *v1, char *v2, void *t)
{
#ifdef USE_AUTH
auth_add(v1,v2);
#endif
}
