3 files changed, 12 insertions, 8 deletions

diff --git a/src/trunnel/hs/cell_introduce1.c b/src/trunnel/hs/cell_introduce1.c
index cebfa28673..53b3d299f2 100644
--- a/src/trunnel/hs/cell_introduce1.c
+++ b/src/trunnel/hs/cell_introduce1.c
@@ -723,7 +723,7 @@ trn_cell_introduce_encrypted_new(void)
   trn_cell_introduce_encrypted_t *val = trunnel_calloc(1, sizeof(trn_cell_introduce_encrypted_t));
   if (NULL == val)
     return NULL;
-  val->onion_key_type = 1;
+  val->onion_key_type = TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR;
   return val;
 }
 
@@ -827,7 +827,7 @@ trn_cell_introduce_encrypted_get_onion_key_type(const trn_cell_introduce_encrypt
 int
 trn_cell_introduce_encrypted_set_onion_key_type(trn_cell_introduce_encrypted_t *inp, uint8_t val)
 {
-  if (! ((val == 1))) {
+  if (! ((val == TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR))) {
      TRUNNEL_SET_ERROR_CODE(inp);
      return -1;
   }
@@ -1069,7 +1069,7 @@ trn_cell_introduce_encrypted_check(const trn_cell_introduce_encrypted_t *obj)
     if (NULL != (msg = trn_cell_extension_check(obj->extensions)))
       return msg;
   }
-  if (! (obj->onion_key_type == 1))
+  if (! (obj->onion_key_type == TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR))
     return "Integer out of bounds";
   if (TRUNNEL_DYNARRAY_LEN(&obj->onion_key) != obj->onion_key_len)
     return "Length mismatch for onion_key";
@@ -1102,7 +1102,7 @@ trn_cell_introduce_encrypted_encoded_len(const trn_cell_introduce_encrypted_t *o
   /* Length of struct trn_cell_extension extensions */
   result += trn_cell_extension_encoded_len(obj->extensions);
 
-  /* Length of u8 onion_key_type IN [1] */
+  /* Length of u8 onion_key_type IN [TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR] */
   result += 1;
 
   /* Length of u16 onion_key_len */
@@ -1166,7 +1166,7 @@ trn_cell_introduce_encrypted_encode(uint8_t *output, const size_t avail, const t
     goto fail; /* XXXXXXX !*/
   written += result; ptr += result;
 
-  /* Encode u8 onion_key_type IN [1] */
+  /* Encode u8 onion_key_type IN [TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR] */
   trunnel_assert(written <= avail);
   if (avail - written < 1)
     goto truncated;
@@ -1270,11 +1270,11 @@ trn_cell_introduce_encrypted_parse_into(trn_cell_introduce_encrypted_t *obj, con
   trunnel_assert((size_t)result <= remaining);
   remaining -= result; ptr += result;
 
-  /* Parse u8 onion_key_type IN [1] */
+  /* Parse u8 onion_key_type IN [TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR] */
   CHECK_REMAINING(1, truncated);
   obj->onion_key_type = (trunnel_get_uint8(ptr));
   remaining -= 1; ptr += 1;
-  if (! (obj->onion_key_type == 1))
+  if (! (obj->onion_key_type == TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR))
     goto fail;
 
   /* Parse u16 onion_key_len */
diff --git a/src/trunnel/hs/cell_introduce1.h b/src/trunnel/hs/cell_introduce1.h
index c94c7d5075..986a531ca7 100644
--- a/src/trunnel/hs/cell_introduce1.h
+++ b/src/trunnel/hs/cell_introduce1.h
@@ -18,6 +18,7 @@ struct link_specifier_st;
 #define TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_LEGACY0 0
 #define TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_LEGACY1 1
 #define TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_ED25519 2
+#define TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR 1
 #if !defined(TRUNNEL_OPAQUE) && !defined(TRUNNEL_OPAQUE_TRN_CELL_INTRODUCE1)
 struct trn_cell_introduce1_st {
   uint8_t legacy_key_id[TRUNNEL_SHA1_LEN];
diff --git a/src/trunnel/hs/cell_introduce1.trunnel b/src/trunnel/hs/cell_introduce1.trunnel
index bbb091d2b8..5911c695a2 100644
--- a/src/trunnel/hs/cell_introduce1.trunnel
+++ b/src/trunnel/hs/cell_introduce1.trunnel
@@ -22,6 +22,9 @@ const TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_LEGACY0 = 0x00;
 const TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_LEGACY1 = 0x01;
 const TRUNNEL_HS_INTRO_AUTH_KEY_TYPE_ED25519 = 0x02;
 
+/* Onion key type. */
+const TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR = 0x01;
+
 /* INTRODUCE1 payload. See details in section 3.2.1. */
 struct trn_cell_introduce1 {
   /* Always zeroed. MUST be checked explicitly by the caller. */
@@ -59,7 +62,7 @@ struct trn_cell_introduce_encrypted {
   struct trn_cell_extension extensions;
 
   /* Onion key material. */
-  u8 onion_key_type IN [0x01];
+  u8 onion_key_type IN [TRUNNEL_HS_INTRO_ONION_KEY_TYPE_NTOR];
   u16 onion_key_len;
   u8 onion_key[onion_key_len];