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csiphash: Add functions to take a global key.

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This commit is contained in:
Nick Mathewson 2014-02-12 11:27:03 -05:00
parent f51df9bb93
commit f05820531a
2 changed files with 17 additions and 0 deletions
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14
src/ext/csiphash.c
View File

@ -132,3 +132,17 @@ uint64_t siphash24(const void *src, unsigned long src_sz, const struct sipkey *k
return (v0 ^ v1) ^ (v2 ^ v3);
}
static int the_siphash_key_is_set = 0;
static struct sipkey the_siphash_key;
uint64_t siphash24g(const void *src, unsigned long src_sz) {
return siphash24(src, src_sz, &the_siphash_key);
}
void siphash_set_global_key(const struct sipkey *key)
{
the_siphash_key.k0 = key->k0;
the_siphash_key.k1 = key->k1;
the_siphash_key_is_set = 1;
}

3
src/ext/siphash.h
View File

@ -6,4 +6,7 @@ struct sipkey {
};
uint64_t siphash24(const void *src, unsigned long src_sz, const struct sipkey *key);
void siphash_set_global_key(const struct sipkey *key);
uint64_t siphash24g(const void *src, unsigned long src_sz);
#endif