Extract the cryptographic parts of crypt_path_t and or_circuit_t.

Additionally, this change extracts the functions that created and
freed these elements.

These structures had common "forward&reverse stream&digest"
elements, but they were initialized and freed through cpath objects,
and different parts of the code depended on them.  Now all that code
is extacted, and kept in relay_crypto.c

1 files changed, 8 insertions, 0 deletions

diff --git a/src/or/relay_crypto.h b/src/or/relay_crypto.h
index 8d09179417..66ae02cee9 100644
--- a/src/or/relay_crypto.h
+++ b/src/or/relay_crypto.h
@@ -12,6 +12,10 @@
 #ifndef TOR_RELAY_CRYPTO_H
 #define TOR_RELAY_CRYPTO_H
 
+int relay_crypto_init(relay_crypto_t *crypto,
+                      const char *key_data, size_t key_data_len,
+                      int reverse, int is_hs_v3);
+
 int relay_decrypt_cell(circuit_t *circ, cell_t *cell,
                        cell_direction_t cell_direction,
                        crypt_path_t **layer_hint, char *recognized);
@@ -19,5 +23,9 @@ void relay_encrypt_cell_outbound(cell_t *cell, origin_circuit_t *or_circ,
                             crypt_path_t *layer_hint);
 void relay_encrypt_cell_inbound(cell_t *cell, or_circuit_t *or_circ);
 
+void relay_crypto_clear(relay_crypto_t *crypto);
+
+void relay_crypto_assert_ok(const relay_crypto_t *crypto);
+
 #endif /* !defined(TOR_RELAY_CRYPTO_H) */