X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=secnet.h;h=eb8bf0cc011fc883980f90226f7fe7c90e56122d;hb=5355a1fb140fcb8e5836ba90ed87ccb85d76f40b;hp=99662a4135b37af90b4310a30e3879857b714dc3;hpb=a04dfe0d448e7e558920ba35410702e589d93545;p=secnet.git

diff --git a/secnet.h b/secnet.h
index 99662a4..eb8bf0c 100644
--- a/secnet.h
+++ b/secnet.h
@@ -46,6 +46,7 @@
 #define MAX_PEER_ADDRS 5
 /* send at most this many copies; honour at most that many addresses */
 
+struct hash_if;
 struct comm_if;
 struct comm_addr;
 
@@ -377,6 +378,11 @@ extern init_module log_module;
 
 struct buffer_if;
 
+struct alg_msg_data {
+    uint8_t *start;
+    int32_t len;
+};
+
 /* PURE closure requires no interface */
 
 /* RESOLVER interface */
@@ -413,18 +419,27 @@ struct random_if {
 
 /* SIGPUBKEY interface */
 
+typedef void sig_sethash_fn(void *st, struct hash_if *hash);
+typedef bool_t sig_unpick_fn(void *sst, struct buffer_if *msg,
+			     struct alg_msg_data *sig);
 typedef bool_t sig_checksig_fn(void *st, uint8_t *data, int32_t datalen,
-			       cstring_t signature);
+			       const struct alg_msg_data *sig);
 struct sigpubkey_if {
     void *st;
+    sig_sethash_fn *sethash; /* must be called before check, if non-0 */
+    sig_unpick_fn *unpick;
     sig_checksig_fn *check;
 };
 
 /* SIGPRIVKEY interface */
 
-typedef string_t sig_makesig_fn(void *st, uint8_t *data, int32_t datalen);
+/* Appends the signature to msg.
+ * Can fail and returnn False, eg if the buffer is too small. */
+typedef bool_t sig_makesig_fn(void *st, uint8_t *data, int32_t datalen,
+			      struct buffer_if *msg);
 struct sigprivkey_if {
     void *st;
+    sig_sethash_fn *sethash; /* must be called before sign, if non-0 */
     sig_makesig_fn *sign;
 };
 
@@ -628,11 +643,12 @@ struct dh_if {
 
 /* HASH interface */
 
-typedef void *hash_init_fn(void);
+typedef void hash_init_fn(void *st /* slen bytes alloc'd by caller */);
 typedef void hash_update_fn(void *st, const void *buf, int32_t len);
-typedef void hash_final_fn(void *st, uint8_t *digest);
+typedef void hash_final_fn(void *st, uint8_t *digest /* hlen bytes */);
 struct hash_if {
-    int32_t len; /* Hash output length in bytes */
+    int32_t slen; /* State length in bytes */
+    int32_t hlen; /* Hash output length in bytes */
     hash_init_fn *init;
     hash_update_fn *update;
     hash_final_fn *final;
@@ -713,7 +729,7 @@ extern void log_from_fd(int fd, cstring_t prefix, struct log_if *log);
  * void COPY_OBJ(  OBJECT& dst, const OBJECT& src);
  * void COPY_ARRAY(OBJECT *dst, const OBJECT *src, INTEGER count);
  *   // Typesafe: we check that the type OBJECT is the same in both cases.
- *   // It is OK to use COPY_OBJ on an array object, provided it's
+ *   // It is OK to use COPY_OBJ on an array object, provided dst is
  *   // _actually_ the whole array object and not decayed into a
  *   // pointer (e.g. a formal parameter).
  */