X-Git-Url: https://git.distorted.org.uk/~mdw/secnet/blobdiff_plain/9c6af4eca6bfb7bed6f86b1f32479f933979c080..refs/heads/mdw/xdh:/secnet.h

diff --git a/secnet.h b/secnet.h
index 554df4b..e54dbbe 100644
--- a/secnet.h
+++ b/secnet.h
@@ -350,6 +350,7 @@ extern init_module transform_cbcmac_module;
 extern init_module netlink_module;
 extern init_module rsa_module;
 extern init_module dh_module;
+extern init_module xdh_module;
 extern init_module md5_module;
 extern init_module slip_module;
 extern init_module tun_module;
@@ -611,26 +612,30 @@ struct netlink_if {
 
 /* DH interface */
 
-/* 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.
+/* Write public value corresponding to the secret to the public buffer, and
+ * return its actual length.  The size of the buffer is given in publiclen,
+ * which will be at least the public_len reported by the closure.  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.  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 int32_t dh_makepublic_fn(void *st, void *public, int32_t publiclen,
+				 uint8_t *secret, int32_t secretlen);
+
+/* Fills buffer (up to buflen) with shared secret.  The publiclen 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,
+typedef bool_t dh_makeshared_fn(void *st,
+				uint8_t *secret, int32_t secretlen,
+				const void *public, int32_t publiclen,
 				uint8_t *sharedsecret, int32_t buflen);
 
 struct dh_if {
     void *st;
     int32_t secret_len; /* Size of random secret to generate */
+    int32_t public_len; /* Maximum number of bytes needed for public value */
     int32_t shared_len; /* Size of generated shared secret */
     int capab_bit;
     dh_makepublic_fn *makepublic;