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Use siphash to implement lcidm hash function

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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 2025-02-20 10:37:30 -05:00
parent 7dd821bab5
commit 17d2fd0752
1 changed files with 14 additions and 12 deletions
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26
ssl/quic/quic_lcidm.c
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@ -11,6 +11,7 @@
#include "internal/quic_types.h"
#include "internal/quic_vlint.h"
#include "internal/common.h"
#include "crypto/siphash.h"
#include <openssl/lhash.h>
#include <openssl/rand.h>
#include <openssl/err.h>
@ -67,20 +68,21 @@ struct quic_lcidm_st {
#endif
};
static unsigned long bin_hash(const unsigned char *buf, size_t buf_len)
{
unsigned long hash = 0;
size_t i;
for (i = 0; i < buf_len; ++i)
hash ^= ((unsigned long)buf[i]) << (8 * (i % sizeof(unsigned long)));
return hash;
}
static unsigned long lcid_hash(const QUIC_LCID *lcid_obj)
{
return bin_hash(lcid_obj->cid.id, lcid_obj->cid.id_len);
SIPHASH siphash = {0, };
unsigned long hashval = 0;
if (!SipHash_set_hash_size(&siphash, sizeof(unsigned long)))
goto out;
if (!SipHash_Init(&siphash, (uint8_t *)lcid_obj->hash_key, 0, 0))
goto out;
SipHash_Update(&siphash, lcid_obj->cid.id, lcid_obj->cid.id_len);
if (!SipHash_Final(&siphash, (unsigned char *)&hashval,
sizeof(unsigned long)))
goto out;
out:
return hashval;
}
static int lcid_comp(const QUIC_LCID *a, const QUIC_LCID *b)