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-rw-r--r--src/or/rendclient.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/or/rendclient.c b/src/or/rendclient.c
index 9bc2d6289d..9e2daf0380 100644
--- a/src/or/rendclient.c
+++ b/src/or/rendclient.c
@@ -265,6 +265,11 @@ rend_client_send_introduction(origin_circuit_t *introcirc,
klen = crypto_pk_asn1_encode(extend_info->onion_key,
tmp+v3_shift+7+DIGEST_LEN+2,
sizeof(tmp)-(v3_shift+7+DIGEST_LEN+2));
+ if (klen < 0) {
+ log_warn(LD_BUG,"Internal error: can't encode public key.");
+ status = -2;
+ goto perm_err;
+ }
set_uint16(tmp+v3_shift+7+DIGEST_LEN, htons(klen));
memcpy(tmp+v3_shift+7+DIGEST_LEN+2+klen, rendcirc->rend_data->rend_cookie,
REND_COOKIE_LEN);