Comments (2)
fridex
commented on May 26, 2024
#87 is also relevant here. IMHO we should make possible to get DTLS window state to userspace, otherwise we are dealing with possible reply attacks here.
In case of DTLS, the userspace should ask for seq_number and DTLS window in order to correctly continue with the session.
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fridex
commented on May 26, 2024
A simpler version would drop records and aggressively advance when coming back to userspace: we could simply advance dtls window to the newest received , e.g. (see include/linux/count_zeros.h for count_leading_zeros):
seq_numeber += (sizeof(dlts_window_mask)*CHAR_BIT) - count_leading_zeros(dtls_window_mask)
The implementation highly depends on #87.
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Related Issues (20)
- Test suite HOT 6
- new ciphersuite: chacha20-poly1305 HOT 1
- license is GPLv3
- Copy data from multiple TLS records to userspace buffer HOT 9
- Buffer changes HOT 6
- kernel fault when decrypting to user buffer HOT 7
- Crypto API scatterwalk copy HOT 2
- MTU handling HOT 8
- Allocating too many pages HOT 1
- Sleeping with lock held HOT 1
- possible lock inversion surrounding splice HOT 2
- Remove rx async work HOT 6
- Race condition in KTLS_RECV_READY HOT 2
- peek tcp data using tcp_read_sock HOT 2
- check sock_queue_rcv_skb return value HOT 4
- DTLS sliding window should always advance
- Investigate using a single FD
- DTLS window check needs to happen after decrypt
- Support async crypto API
- Paper might also wish to cite Plan 9's devtls as related work HOT 1
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