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#include "skypeweb_util.h"
#include <cipher.h>
gchar *
skypeweb_string_get_chunk(const gchar *haystack, gsize len, const gchar *start, const gchar *end)
{
const gchar *chunk_start, *chunk_end;
g_return_val_if_fail(haystack && start && end, NULL);
if (len > 0) {
chunk_start = g_strstr_len(haystack, len, start);
} else {
chunk_start = strstr(haystack, start);
}
g_return_val_if_fail(chunk_start, NULL);
chunk_start += strlen(start);
if (len > 0) {
chunk_end = g_strstr_len(chunk_start, len - (chunk_start - haystack), end);
} else {
chunk_end = strstr(chunk_start, end);
}
g_return_val_if_fail(chunk_end, NULL);
return g_strndup(chunk_start, chunk_end - chunk_start);
}
gchar *
skypeweb_jsonobj_to_string(JsonObject *jsonobj)
{
JsonGenerator *generator;
JsonNode *root;
gchar *string;
root = json_node_new(JSON_NODE_OBJECT);
json_node_set_object(root, jsonobj);
generator = json_generator_new();
json_generator_set_root(generator, root);
string = json_generator_to_data(generator, NULL);
g_object_unref(generator);
json_node_free(root);
return string;
}
/** turn https://bay-client-s.gateway.messenger.live.com/v1/users/ME/contacts/8:eionrobb
or https://bay-client-s.gateway.messenger.live.com/v1/users/8:eionrobb/presenceDocs/messagingService
into eionrobb
*/
const gchar *
skypeweb_contact_url_to_name(const gchar *url)
{
static gchar *tempname = NULL;
const gchar *start, *end;
start = g_strrstr(url, "/8:");
if (!start) return NULL;
start = start + 3;
if ((end = strchr(start, '/'))) {
g_free(tempname);
tempname = g_strndup(start, end - start);
return tempname;
}
return start;
}
/** turn https://bay-client-s.gateway.messenger.live.com/v1/users/ME/conversations/19:blah@thread.skype
into 19:blah@thread.skype
*/
const gchar *
skypeweb_thread_url_to_name(const gchar *url)
{
static gchar *tempname = NULL;
const gchar *start, *end;
start = g_strrstr(url, "/19:");
if (!start) return NULL;
start = start + 1;
if ((end = strchr(start, '/'))) {
g_free(tempname);
tempname = g_strndup(start, end - start);
return tempname;
}
return start;
}
/** Blatantly stolen from MSN prpl, with super-secret SHA256 change! */
#define BUFSIZE 256
char *
skypeweb_hmac_sha256(char *input)
{
PurpleCipher *cipher;
PurpleCipherContext *context;
const guchar productKey[] = SKYPEWEB_LOCKANDKEY_SECRET;
const guchar productID[] = SKYPEWEB_LOCKANDKEY_APPID;
const char hexChars[] = "0123456789abcdef";
char buf[BUFSIZE];
unsigned char sha256Hash[32];
unsigned char *newHash;
unsigned int *sha256Parts;
unsigned int *chlStringParts;
unsigned int newHashParts[5];
gchar *output;
long long nHigh = 0, nLow = 0;
int len;
int i;
/* Create the SHA256 hash by using Purple SHA256 algorithm */
cipher = purple_ciphers_find_cipher("sha256");
context = purple_cipher_context_new(cipher, NULL);
purple_cipher_context_append(context, (guchar *)input, strlen(input));
purple_cipher_context_append(context, productKey, sizeof(productKey) - 1);
purple_cipher_context_digest(context, sizeof(sha256Hash), sha256Hash, NULL);
purple_cipher_context_destroy(context);
/* Split it into four integers */
sha256Parts = (unsigned int *)sha256Hash;
for (i = 0; i < 4; i++) {
/* adjust endianess */
sha256Parts[i] = GUINT_TO_LE(sha256Parts[i]);
/* & each integer with 0x7FFFFFFF */
/* and save one unmodified array for later */
newHashParts[i] = sha256Parts[i];
sha256Parts[i] &= 0x7FFFFFFF;
}
/* make a new string and pad with '0' to length that's a multiple of 8 */
snprintf(buf, BUFSIZE - 5, "%s%s", input, productID);
len = strlen(buf);
if ((len % 8) != 0) {
int fix = 8 - (len % 8);
memset(&buf[len], '0', fix);
buf[len + fix] = '\0';
len += fix;
}
/* split into integers */
chlStringParts = (unsigned int *)buf;
/* this is magic */
for (i = 0; i < (len / 4); i += 2) {
long long temp;
chlStringParts[i] = GUINT_TO_LE(chlStringParts[i]);
chlStringParts[i + 1] = GUINT_TO_LE(chlStringParts[i + 1]);
temp = (0x0E79A9C1 * (long long)chlStringParts[i]) % 0x7FFFFFFF;
temp = (sha256Parts[0] * (temp + nLow) + sha256Parts[1]) % 0x7FFFFFFF;
nHigh += temp;
temp = ((long long)chlStringParts[i + 1] + temp) % 0x7FFFFFFF;
nLow = (sha256Parts[2] * temp + sha256Parts[3]) % 0x7FFFFFFF;
nHigh += nLow;
}
nLow = (nLow + sha256Parts[1]) % 0x7FFFFFFF;
nHigh = (nHigh + sha256Parts[3]) % 0x7FFFFFFF;
newHashParts[0] ^= nLow;
newHashParts[1] ^= nHigh;
newHashParts[2] ^= nLow;
newHashParts[3] ^= nHigh;
/* adjust endianness */
for(i = 0; i < 4; i++)
newHashParts[i] = GUINT_TO_LE(newHashParts[i]);
/* make a string of the parts */
newHash = (unsigned char *)newHashParts;
/* convert to hexadecimal */
output = g_new0(gchar, 33);
for (i = 0; i < 16; i++)
{
output[i * 2] = hexChars[(newHash[i] >> 4) & 0xF];
output[(i * 2) + 1] = hexChars[newHash[i] & 0xF];
}
output[32] = '\0';
return output;
}
gint64
skypeweb_get_js_time()
{
GTimeVal val;
g_get_current_time (&val);
return (val.tv_sec * 1000) + (val.tv_usec / 1000);
}
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