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keys: add support for checking truncated MACs

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Miroslav Lichvar
2016-11-29 11:32:39 +01:00
parent 2f5b4aea91
commit 38c4a7ff97
3 changed files with 10 additions and 8 deletions
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2
ntp_core.c
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@@ -1181,7 +1181,7 @@ check_packet_auth(NTP_Packet *pkt, int length,
if (remainder >= NTP_MIN_MAC_LENGTH && remainder <= NTP_MAX_MAC_LENGTH) {
id = ntohl(*(uint32_t *)(data + i));
if (KEY_CheckAuth(id, (void *)pkt, i, (void *)(data + i + 4),
remainder - 4)) {
remainder - 4, NTP_MAX_MAC_LENGTH - 4)) {
*auth_mode = AUTH_SYMMETRIC;
*key_id = id;
return 1;