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/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* Code adapted from libgadu (C) 2008 Wojtek Kaniewski <wojtekka@irc.pl>
* (http://toxygen.net/libgadu/) during Google Summer of Code 2012
* by Tomek Wasilczyk (http://www.wasilczyk.pl).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include "oauth.h"
#include "oauth-parameter.h"
#include <cipher.h>
char *gg_oauth_static_nonce; /* dla unit testów */
char *gg_oauth_static_timestamp; /* dla unit testów */
static void gg_oauth_generate_nonce(char *buf, int len)
{
const char charset[] = "0123456789";
if (buf == NULL || len < 1)
return;
while (len > 1) {
*buf++ = charset[(unsigned) (((float) sizeof(charset) - 1.0) * rand() / (RAND_MAX + 1.0))];
len--;
}
*buf = 0;
}
static gchar *gg_hmac_sha1(const char *key, const char *message)
{
PurpleCipherContext *context;
guchar digest[20];
context = purple_cipher_context_new_by_name("hmac", NULL);
purple_cipher_context_set_option(context, "hash", "sha1");
purple_cipher_context_set_key(context, (guchar *)key, strlen(key));
purple_cipher_context_append(context, (guchar *)message, strlen(message));
purple_cipher_context_digest(context, digest, sizeof(digest));
purple_cipher_context_destroy(context);
return purple_base64_encode(digest, sizeof(digest));
}
static char *gg_oauth_generate_signature(const char *method, const char *url, const char *request, const char *consumer_secret, const char *token_secret)
{
char *text, *key, *res;
gchar *url_e, *request_e, *consumer_secret_e, *token_secret_e;
url_e = g_uri_escape_string(url, "?", FALSE);
g_strdelimit(url_e, "?", '\0');
request_e = g_uri_escape_string(request, NULL, FALSE);
text = g_strdup_printf("%s&%s&%s", method, url_e, request_e);
g_free(url_e);
g_free(request_e);
consumer_secret_e = g_uri_escape_string(consumer_secret, NULL, FALSE);
token_secret_e = token_secret ? g_uri_escape_string(token_secret, NULL, FALSE) : NULL;
key = g_strdup_printf("%s&%s", consumer_secret_e, token_secret ? token_secret_e : "");
g_free(consumer_secret_e);
g_free(token_secret_e);
res = gg_hmac_sha1(key, text);
free(key);
free(text);
return res;
}
char *gg_oauth_generate_header(const char *method, const char *url, const const char *consumer_key, const char *consumer_secret, const char *token, const char *token_secret)
{
char *request, *signature, *res;
char nonce[80], timestamp[16];
gg_oauth_parameter_t *params = NULL;
if (gg_oauth_static_nonce == NULL)
gg_oauth_generate_nonce(nonce, sizeof(nonce));
else {
strncpy(nonce, gg_oauth_static_nonce, sizeof(nonce) - 1);
nonce[sizeof(nonce) - 1] = 0;
}
if (gg_oauth_static_timestamp == NULL)
snprintf(timestamp, sizeof(timestamp), "%ld", time(NULL));
else {
strncpy(timestamp, gg_oauth_static_timestamp, sizeof(timestamp) - 1);
timestamp[sizeof(timestamp) - 1] = 0;
}
gg_oauth_parameter_set(¶ms, "oauth_consumer_key", consumer_key);
gg_oauth_parameter_set(¶ms, "oauth_nonce", nonce);
gg_oauth_parameter_set(¶ms, "oauth_signature_method", "HMAC-SHA1");
gg_oauth_parameter_set(¶ms, "oauth_timestamp", timestamp);
gg_oauth_parameter_set(¶ms, "oauth_token", token);
gg_oauth_parameter_set(¶ms, "oauth_version", "1.0");
request = gg_oauth_parameter_join(params, 0);
signature = gg_oauth_generate_signature(method, url, request, consumer_secret, token_secret);
free(request);
gg_oauth_parameter_free(params);
params = NULL;
if (signature == NULL)
return NULL;
gg_oauth_parameter_set(¶ms, "oauth_version", "1.0");
gg_oauth_parameter_set(¶ms, "oauth_nonce", nonce);
gg_oauth_parameter_set(¶ms, "oauth_timestamp", timestamp);
gg_oauth_parameter_set(¶ms, "oauth_consumer_key", consumer_key);
gg_oauth_parameter_set(¶ms, "oauth_token", token);
gg_oauth_parameter_set(¶ms, "oauth_signature_method", "HMAC-SHA1");
gg_oauth_parameter_set(¶ms, "oauth_signature", signature);
free(signature);
res = gg_oauth_parameter_join(params, 1);
gg_oauth_parameter_free(params);
return res;
}
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