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Add random hash key value to lcidm struct

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This is in preparation for using siphash to compute lcidm hash table
values

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26849)
This commit is contained in:
Neil Horman 2025-02-19 16:17:45 -05:00
parent 4d16d2f40a
commit 3e3942b42f
1 changed files with 9 additions and 0 deletions
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9
ssl/quic/quic_lcidm.c
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@ -32,6 +32,9 @@ typedef struct quic_lcid_st {
QUIC_CONN_ID cid;
uint64_t seq_num;
/* copy of the hash key from lcidm */
uint64_t *hash_key;
/* Back-pointer to the owning QUIC_LCIDM_CONN structure. */
QUIC_LCIDM_CONN *conn;
@ -55,6 +58,7 @@ struct quic_lcidm_conn_st {
struct quic_lcidm_st {
OSSL_LIB_CTX *libctx;
uint64_t hash_key[2]; /* random key for siphash */
LHASH_OF(QUIC_LCID) *lcids; /* (QUIC_CONN_ID) -> (QUIC_LCID *) */
LHASH_OF(QUIC_LCIDM_CONN) *conns; /* (void *opaque) -> (QUIC_LCIDM_CONN *) */
size_t lcid_len; /* Length in bytes for all LCIDs */
@ -104,6 +108,11 @@ QUIC_LCIDM *ossl_quic_lcidm_new(OSSL_LIB_CTX *libctx, size_t lcid_len)
if ((lcidm = OPENSSL_zalloc(sizeof(*lcidm))) == NULL)
goto err;
/* generate a random key for the hash tables hash function */
if (!RAND_bytes_ex(libctx, (unsigned char *)&lcidm->hash_key,
sizeof(uint64_t) * 2, 0))
goto err;
if ((lcidm->lcids = lh_QUIC_LCID_new(lcid_hash, lcid_comp)) == NULL)
goto err;