extern init_module slip_module;
extern init_module tun_module;
extern init_module sha1_module;
+extern init_module sha512_module;
extern init_module log_module;
/***** END of module support *****/
struct transform_if {
void *st;
- int capab_transformnum;
- int32_t keylen; /* <<< INT_MAX */
+ int capab_bit;
transform_createinstance_fn *create;
};
/* DH interface */
-/* Returns public key as a malloced hex string */
+/* Returns public key as a malloced hex string. The secretlen will be the
+ * secret_len reported by the closure. This operation is not expected to
+ * fail.
+ */
typedef string_t dh_makepublic_fn(void *st, uint8_t *secret,
int32_t secretlen);
-/* Fills buffer (up to buflen) with shared secret */
-typedef void dh_makeshared_fn(void *st, uint8_t *secret,
- int32_t secretlen, cstring_t rempublic,
- uint8_t *sharedsecret, int32_t buflen);
+
+/* Fills buffer (up to buflen) with shared secret. The rempublic string
+ * comes from the remote site, and may not be acceptable, though it has been
+ * checked for memory-safety. The secretlen and buflen are the secret_len
+ * and shared_len reported by the closure, respectively. Return false on
+ * faliure (e.g., if the publiclen is unacceptable).
+ */
+typedef bool_t dh_makeshared_fn(void *st, uint8_t *secret,
+ int32_t secretlen, cstring_t rempublic,
+ uint8_t *sharedsecret, int32_t buflen);
+
struct dh_if {
void *st;
- int32_t len; /* Approximate size of modulus in bytes */
- int32_t ceil_len; /* Number of bytes just sufficient to contain modulus */
+ int32_t secret_len; /* Size of random secret to generate */
+ int32_t shared_len; /* Size of generated shared secret */
dh_makepublic_fn *makepublic;
dh_makeshared_fn *makeshared;
};