+ default:
+ break;
+ }
+
+ return h;
+}
+
+/* Hash Client ID's hash. */
+
+SilcUInt32 silc_hash_client_id_hash(void *key, void *user_context)
+{
+ int i;
+ unsigned char *hash = key;
+ SilcUInt32 h = 0, g;
+
+ for (i = 0; i < CLIENTID_HASH_LEN; i++) {
+ h = (h << 4) + hash[i];
+ if ((g = h & 0xf0000000)) {
+ h = h ^ (g >> 24);
+ h = h ^ g;
+ }
+ }
+
+ return h;
+}
+
+/* Hash binary data. The `user_context' is the data length. */
+
+SilcUInt32 silc_hash_data(void *key, void *user_context)
+{
+ SilcUInt32 len = SILC_PTR_TO_32(user_context), h = 0;
+ unsigned char *data = (unsigned char *)key;
+ int i;
+
+ h = (data[0] * data[len - 1] + 1) * len;
+ for (i = 0; i < len; i++)
+ h ^= data[i];
+
+ return h;
+}
+
+/* Hash public key of any type. */
+
+SilcUInt32 silc_hash_public_key(void *key, void *user_context)
+{
+ SilcPublicKey public_key = key;
+ unsigned char *pk;
+ SilcUInt32 pk_len;
+ SilcUInt32 hash = 0;
+
+ pk = silc_pkcs_public_key_encode(public_key, &pk_len);
+ if (!pk)
+ return hash;
+
+ hash = silc_hash_data(pk, SILC_32_TO_PTR(pk_len));
+ silc_free(pk);
+
+ return hash;
+}
+
+/* Compares two strings. It may be used as SilcHashTable comparison
+ function. */
+
+SilcBool silc_hash_string_compare(void *key1, void *key2, void *user_context)
+{
+ return !strcasecmp((char *)key1, (char *)key2);
+}
+
+/* Compares two ID's. May be used as SilcHashTable comparison function.
+ The Client ID's compares only the hash of the Client ID not any other
+ part of the Client ID. Other ID's are fully compared. */
+
+SilcBool silc_hash_id_compare(void *key1, void *key2, void *user_context)
+{
+ SilcIdType id_type = (SilcIdType)SILC_PTR_TO_32(user_context);
+ return (id_type == SILC_ID_CLIENT ?
+ SILC_ID_COMPARE_HASH((SilcClientID *)key1, (SilcClientID *)key2) :
+ SILC_ID_COMPARE_TYPE(key1, key2, id_type));
+}
+
+/* Compares two ID's. Compares full IDs. */
+
+SilcBool silc_hash_id_compare_full(void *key1, void *key2, void *user_context)
+{
+ SilcIdType id_type = (SilcIdType)SILC_PTR_TO_32(user_context);
+ return SILC_ID_COMPARE_TYPE(key1, key2, id_type);
+}
+
+/* Compare two Client ID's entirely and not just the hash from the ID. */
+
+SilcBool silc_hash_client_id_compare(void *key1, void *key2,
+ void *user_context)
+{
+ return SILC_ID_COMPARE_TYPE(key1, key2, SILC_ID_CLIENT);
+}
+
+/* Compares binary data. May be used as SilcHashTable comparison function. */
+
+SilcBool silc_hash_data_compare(void *key1, void *key2, void *user_context)
+{
+ SilcUInt32 len = SILC_PTR_TO_32(user_context);
+ return !memcmp(key1, key2, len);
+}
+
+/* Compares UTF-8 string. */
+
+SilcBool silc_hash_utf8_compare(void *key1, void *key2, void *user_context)
+{
+ int l1 = strlen((char *)key1);
+ int l2 = strlen((char *)key2);
+ if (l1 != l2)
+ return FALSE;
+ return !memcmp(key1, key2, l2);
+}
+
+/* Compares two SILC Public keys. It may be used as SilcHashTable
+ comparison function. */
+
+SilcBool silc_hash_public_key_compare(void *key1, void *key2,
+ void *user_context)
+{
+ return silc_pkcs_public_key_compare(key1, key2);
+}
+
+/* Creates fingerprint from data, usually used with SHA1 digests */
+
+char *silc_fingerprint(const unsigned char *data, SilcUInt32 data_len)
+{
+ char fingerprint[64], *cp;
+ int i;
+
+ memset(fingerprint, 0, sizeof(fingerprint));
+ cp = fingerprint;
+ for (i = 0; i < data_len; i++) {
+ silc_silc_snprintf(cp, sizeof(fingerprint), "%02X", data[i]);
+ cp += 2;
+
+ if ((i + 1) % 2 == 0)
+ silc_silc_snprintf(cp++, sizeof(fingerprint), " ");
+
+ if ((i + 1) % 10 == 0)
+ silc_silc_snprintf(cp++, sizeof(fingerprint), " ");
+ }
+ i--;
+ if ((i + 1) % 2 == 0)
+ cp[-2] = 0;
+ if ((i + 1) % 10 == 0)
+ cp[-1] = 0;
+
+ return strdup(fingerprint);
+}
+
+/* Return TRUE if the `data' is ASCII string. */
+
+SilcBool silc_string_is_ascii(const unsigned char *data, SilcUInt32 data_len)
+{
+ int i;
+
+ for (i = 0; i < data_len; i++) {
+ if (!isascii(data[i]))
+ return FALSE;