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#include "flickr-oauth.h"
#include <glib.h>
#include <stdlib.h>
#include <string.h>
#include <oauth.h>
/* ----------------- private functions declarations ----------------- */
static gchar *
get_timestamp (void);
static void
free_params (gchar **params, gint params_no);
/* -------------------------- public API -------------------------- */
gchar *
flickroauth_get_signature (const gchar *consumer_secret,
const gchar *token_secret,
const gchar *url,
gchar **params,
gint params_no)
{
gchar *params_string;
gchar *base_string;
gchar *encryption_key;
gchar *signature;
qsort (params, params_no, sizeof (gchar *), oauth_cmpstringp);
params_string = oauth_serialize_url (params_no, 0, params);
base_string = oauth_catenc (3, FLICKR_OAUTH_HTTP_METHOD,
url, params_string);
g_free (params_string);
if (token_secret == NULL)
encryption_key = g_strdup_printf ("%s&", consumer_secret);
else
encryption_key = g_strdup_printf ("%s&%s",
consumer_secret,
token_secret);
signature = oauth_sign_hmac_sha1 (base_string, encryption_key);
g_free (encryption_key);
g_free (base_string);
return signature;
}
gchar *
flickroauth_create_api_url (const gchar *consumer_key,
const gchar *consumer_secret,
const gchar *oauth_token,
const gchar *oauth_token_secret,
gchar **params,
const guint params_no)
{
guint i;
gchar *nonce;
gchar *timestamp;
gchar *signature;
gchar *url;
gchar *params_string;
g_return_val_if_fail (consumer_key, NULL);
/* handle Non-authorised call */
if (oauth_token == NULL)
{
params_string = oauth_serialize_url (params_no, 0, params);
url = g_strdup_printf ("%s?api_key=%s&%s", FLICKR_API_URL,
consumer_key,
params_string);
g_free (params_string);
return url;
}
/* there are 7 pre-filled parameters in authorize call*/
guint params_all_no = params_no + 7;
gchar **params_all = g_malloc ((params_all_no) * sizeof (gchar *));
if (params_all == NULL)
return NULL;
nonce = oauth_gen_nonce ();
timestamp = get_timestamp ();
params_all[0] = g_strdup_printf ("oauth_nonce=%s", nonce);
params_all[1] = g_strdup_printf ("oauth_timestamp=%s", timestamp);
params_all[2] = g_strdup_printf ("oauth_consumer_key=%s",
consumer_key);
params_all[3] = g_strdup_printf ("oauth_signature_method=%s",
FLICKR_OAUTH_SIGNATURE_METHOD);
params_all[4] = g_strdup_printf ("oauth_version=%s",
FLICKR_OAUTH_VERSION);
params_all[5] = g_strdup_printf ("oauth_token=%s", oauth_token);
/* copy user parameters to the params_all */
for (i = 0; i < params_no; i++)
params_all[7 + i - 1] = g_strdup (params[i]);
g_free (nonce);
g_free (timestamp);
signature = flickroauth_get_signature (consumer_secret,
oauth_token_secret,
FLICKR_API_URL, params_all,
params_all_no - 1);
params_all[params_all_no - 1] = g_strdup_printf ("oauth_signature=%s",
signature);
g_free (signature);
params_string = oauth_serialize_url (params_all_no, 0, params_all);
free_params (params_all, params_all_no);
g_free (params_all);
url = g_strdup_printf ("%s?%s", FLICKR_API_URL, params_string);
return url;
}
inline gchar *
flickroauth_authorization_url (const gchar *oauth_token,
const gchar *perms)
{
gchar *url;
if (perms == NULL)
url = g_strdup_printf ("%s?oauth_token=%s", FLICKR_OAUTH_AUTHPOINT,
oauth_token);
else
url = g_strdup_printf ("%s?oauth_token=%s&perms=%s",
FLICKR_OAUTH_AUTHPOINT,
oauth_token, perms);
return url;
}
/* ----------------------- private functions ----------------------- */
inline static gchar *
get_timestamp (void)
{
GTimeVal tm;
g_get_current_time (&tm);
return g_strdup_printf ("%lu", tm.tv_sec);
}
static void
free_params (gchar **params, gint params_no)
{
gint i;
for (i = 0; i < params_no; i++)
g_free (params[i]);
}
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