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-rw-r--r--src/or/routerkeys.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/or/routerkeys.c b/src/or/routerkeys.c
index 71889d2721..fd4c6ce0dd 100644
--- a/src/or/routerkeys.c
+++ b/src/or/routerkeys.c
@@ -1236,7 +1236,9 @@ make_tap_onion_key_crosscert(const crypto_pk_t *onion_key,
uint8_t signed_data[DIGEST_LEN + ED25519_PUBKEY_LEN];
*len_out = 0;
- crypto_pk_get_digest(rsa_id_key, (char*)signed_data);
+ if (crypto_pk_get_digest(rsa_id_key, (char*)signed_data) < 0) {
+ return NULL;
+ }
memcpy(signed_data + DIGEST_LEN, master_id_key->pubkey, ED25519_PUBKEY_LEN);
int r = crypto_pk_private_sign(onion_key,