diff options
Diffstat (limited to 'src/plugins/ikev2/ikev2.c')
| -rw-r--r-- | src/plugins/ikev2/ikev2.c | 55 |
1 files changed, 34 insertions, 21 deletions
diff --git a/src/plugins/ikev2/ikev2.c b/src/plugins/ikev2/ikev2.c index 41a52b6fcfe..3d95da315f1 100644 --- a/src/plugins/ikev2/ikev2.c +++ b/src/plugins/ikev2/ikev2.c @@ -405,8 +405,8 @@ ikev2_generate_sa_init_data (ikev2_sa_t * sa) RAND_bytes ((u8 *) & sa->rspi, 8); /* generate nonce */ - sa->r_nonce = vec_new (u8, IKEV2_NONCE_SIZE); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + sa->r_nonce = vec_new (u8, vec_len (sa->i_nonce)); + RAND_bytes ((u8 *) sa->r_nonce, vec_len (sa->i_nonce)); } /* generate dh keys */ @@ -671,13 +671,17 @@ ikev2_parse_ke_payload (const void *p, u32 rlen, ikev2_sa_t * sa, } static int -ikev2_parse_nonce_payload (const void *p, u32 rlen, u8 * nonce) +ikev2_parse_nonce_payload (const void *p, u32 rlen, const u8 **nonce) { const ike_payload_header_t *ikep = p; u16 plen = clib_net_to_host_u16 (ikep->length); ASSERT (plen >= sizeof (*ikep) && plen <= rlen); - clib_memcpy_fast (nonce, ikep->payload, plen - sizeof (*ikep)); - return 1; + int len = plen - sizeof (*ikep); + ASSERT (len >= 16 && len <= 256); + if (PREDICT_FALSE (len < 16 || len > 256)) + return 0; + *nonce = ikep->payload; + return len; } static int @@ -696,7 +700,6 @@ static int ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike, udp_header_t *udp, u32 len, u32 sw_if_index) { - u8 nonce[IKEV2_NONCE_SIZE]; int p = 0; u8 payload = ike->nextpayload; ike_payload_header_t *ikep; @@ -739,9 +742,13 @@ ikev2_process_sa_init_req (vlib_main_t *vm, ikev2_sa_t *sa, ike_header_t *ike, } else if (payload == IKEV2_PAYLOAD_NONCE) { + const u8 *nonce; + int nonce_len; vec_reset_length (sa->i_nonce); - if (ikev2_parse_nonce_payload (ikep, current_length, nonce)) - vec_add (sa->i_nonce, nonce, plen - sizeof (*ikep)); + if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length, + &nonce)) <= 0) + return 0; + vec_add (sa->i_nonce, nonce, nonce_len); } else if (payload == IKEV2_PAYLOAD_NOTIFY) { @@ -805,7 +812,6 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, ikev2_sa_t * sa, ike_header_t * ike, udp_header_t * udp, u32 len) { - u8 nonce[IKEV2_NONCE_SIZE]; int p = 0; u8 payload = ike->nextpayload; ike_payload_header_t *ikep; @@ -853,9 +859,13 @@ ikev2_process_sa_init_resp (vlib_main_t * vm, } else if (payload == IKEV2_PAYLOAD_NONCE) { + const u8 *nonce; + int nonce_len; vec_reset_length (sa->r_nonce); - if (ikev2_parse_nonce_payload (ikep, current_length, nonce)) - vec_add (sa->r_nonce, nonce, plen - sizeof (*ikep)); + if ((nonce_len = ikev2_parse_nonce_payload (ikep, current_length, + &nonce)) <= 0) + return; + vec_add (sa->r_nonce, nonce, nonce_len); } else if (payload == IKEV2_PAYLOAD_NOTIFY) { @@ -1340,7 +1350,6 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, u8 payload = ike->nextpayload; u8 *plaintext = 0; u8 rekeying = 0; - u8 nonce[IKEV2_NONCE_SIZE]; ikev2_rekey_t *rekey; ike_payload_header_t *ikep; ikev2_notify_t *n = 0; @@ -1350,6 +1359,8 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_child_sa_t *child_sa; u32 dlen = 0, src; u16 plen; + const u8 *nonce = 0; + int nonce_len = 0; if (sa->is_initiator) src = ip_addr_v4 (&sa->raddr).as_u32; @@ -1397,7 +1408,9 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, } else if (payload == IKEV2_PAYLOAD_NONCE) { - ikev2_parse_nonce_payload (ikep, current_length, nonce); + nonce_len = ikev2_parse_nonce_payload (ikep, current_length, &nonce); + if (nonce_len <= 0) + goto cleanup_and_exit; } else if (payload == IKEV2_PAYLOAD_TSI) { @@ -1421,7 +1434,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, p += plen; } - if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP) + if (!proposal || proposal->protocol_id != IKEV2_PROTOCOL_ESP || !nonce) goto cleanup_and_exit; if (sa->is_initiator) @@ -1438,7 +1451,7 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, rekey->tsr = tsr; /* update Nr */ vec_reset_length (sa->r_nonce); - vec_add (sa->r_nonce, nonce, IKEV2_NONCE_SIZE); + vec_add (sa->r_nonce, nonce, nonce_len); child_sa = ikev2_sa_get_child (sa, rekey->ispi, IKEV2_PROTOCOL_ESP, 1); if (child_sa) { @@ -1464,10 +1477,10 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); /* update Ni */ vec_reset_length (sa->i_nonce); - vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); + vec_add (sa->i_nonce, nonce, nonce_len); /* generate new Nr */ - vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + vec_validate (sa->r_nonce, nonce_len - 1); + RAND_bytes ((u8 *) sa->r_nonce, nonce_len); } else { @@ -1478,10 +1491,10 @@ ikev2_process_create_child_sa_req (vlib_main_t * vm, ikev2_select_proposal (proposal, IKEV2_PROTOCOL_ESP); /* update Ni */ vec_reset_length (sa->i_nonce); - vec_add (sa->i_nonce, nonce, IKEV2_NONCE_SIZE); + vec_add (sa->i_nonce, nonce, nonce_len); /* generate new Nr */ - vec_validate (sa->r_nonce, IKEV2_NONCE_SIZE - 1); - RAND_bytes ((u8 *) sa->r_nonce, IKEV2_NONCE_SIZE); + vec_validate (sa->r_nonce, nonce_len - 1); + RAND_bytes ((u8 *) sa->r_nonce, nonce_len); } rekey->tsi = tsi; rekey->tsr = tsr; |