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hsmd: HSM_VERSION 6: get_per_commitment_point never returns secret

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Changelog-Changed: hsmd: HSM_VERSION 6: get_per_commitment_point does
not imply index - 2 is revoked, makes it safe to call on any index.
This commit is contained in:
Ken Sedgwick 2024-03-15 14:07:59 -07:00 committed by Alex Myers
parent 37fe32aa17
commit eda0b28cbb
3 changed files with 7 additions and 7 deletions
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7
channeld/channeld.c
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@ -1420,11 +1420,8 @@ static void start_commit_timer(struct peer *peer)
} }
/* Fetch the requested point. The secret is no longer returned, use /* Fetch the requested point. The secret is no longer returned, use
* revoke_commitment. * revoke_commitment instead. It is legal to call this on any
* * commitment (including distant future).
* NOTE - Because the internals of this call also release the secret
* from a revoked commitment it is an error to call this past the next
* commitment.
*/ */
static void get_per_commitment_point(u64 index, struct pubkey *point) static void get_per_commitment_point(u64 index, struct pubkey *point)
{ {

3
common/hsm_version.h
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@ -25,7 +25,8 @@
* v5 drop init v2: 5024454532fe5a78bb7558000cb344190888b9915360d3d56ddca22eaba9b872 * v5 drop init v2: 5024454532fe5a78bb7558000cb344190888b9915360d3d56ddca22eaba9b872
* v5 with dev_preinit: b93e18534a468a4aa9f7015db42e9c363c32aeee5f9146b36dc953ebbdc3d33c * v5 with dev_preinit: b93e18534a468a4aa9f7015db42e9c363c32aeee5f9146b36dc953ebbdc3d33c
* v5 with preapprove_check: 0ed6dd4ea2c02b67c51b1420b3d07ab2227a4c06ce7e2942d946967687e9baf7 * v5 with preapprove_check: 0ed6dd4ea2c02b67c51b1420b3d07ab2227a4c06ce7e2942d946967687e9baf7
* v6 no secret from get_per_commitment_point: 0cad1790beb3473d64355f4cb4f64daa80c28c8a241998b7ef0223385d7ffff9
*/ */
#define HSM_MIN_VERSION 5 #define HSM_MIN_VERSION 5
#define HSM_MAX_VERSION 5 #define HSM_MAX_VERSION 6
#endif /* LIGHTNING_COMMON_HSM_VERSION_H */ #endif /* LIGHTNING_COMMON_HSM_VERSION_H */

4
hsmd/hsmd_wire.csv
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@ -324,10 +324,12 @@ msgdata,hsmd_sign_splice_tx,input_index,u32,
msgtype,hsmd_sign_tx_reply,112 msgtype,hsmd_sign_tx_reply,112
msgdata,hsmd_sign_tx_reply,sig,bitcoin_signature, msgdata,hsmd_sign_tx_reply,sig,bitcoin_signature,
# Openingd/channeld/onchaind asks for Nth per_commitment_point, if > 2, gets N-2 secret. # Openingd/channeld/onchaind asks for Nth per_commitment_point
# Prior to HSM_VERSION 6 we will return an old_commitment_secret
msgtype,hsmd_get_per_commitment_point,18 msgtype,hsmd_get_per_commitment_point,18
msgdata,hsmd_get_per_commitment_point,n,u64, msgdata,hsmd_get_per_commitment_point,n,u64,
# IMPORTANT - Beginning HSM_VERSION 6 we never return an old_commitment_secret
msgtype,hsmd_get_per_commitment_point_reply,118 msgtype,hsmd_get_per_commitment_point_reply,118
msgdata,hsmd_get_per_commitment_point_reply,per_commitment_point,pubkey, msgdata,hsmd_get_per_commitment_point_reply,per_commitment_point,pubkey,
msgdata,hsmd_get_per_commitment_point_reply,old_commitment_secret,?secret, msgdata,hsmd_get_per_commitment_point_reply,old_commitment_secret,?secret,

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