diff options
Diffstat (limited to 'hmac.c')
| -rw-r--r-- | hmac.c | 10 |
1 files changed, 7 insertions, 3 deletions
@@ -33,6 +33,7 @@ #include "hmac.h" #include "memxor.h" +#include "nettle-internal.h" #define IPAD 0x36 #define OPAD 0x5c @@ -42,7 +43,8 @@ hmac_set_key(void *outer, void *inner, void *state, const struct nettle_hash *hash, unsigned key_length, const uint8_t *key) { - uint8_t *pad = alloca(hash->block_size); + TMP_DECL(pad, uint8_t, NETTLE_MAX_HASH_BLOCK_SIZE); + TMP_ALLOC(pad, hash->block_size); hash->init(outer); hash->init(inner); @@ -52,7 +54,8 @@ hmac_set_key(void *outer, void *inner, void *state, /* Reduce key to the algorithm's hash size. Use the area pointed * to by state for the temporary state. */ - uint8_t *digest = alloca(hash->digest_size); + TMP_DECL(digest, uint8_t, NETTLE_MAX_HASH_DIGEST_SIZE); + TMP_ALLOC(digest, hash->digest_size); hash->init(state); hash->update(state, key_length, key); @@ -90,7 +93,8 @@ hmac_digest(const void *outer, const void *inner, void *state, const struct nettle_hash *hash, unsigned length, uint8_t *dst) { - uint8_t *digest = alloca(hash->digest_size); + TMP_DECL(digest, uint8_t, NETTLE_MAX_HASH_DIGEST_SIZE); + TMP_ALLOC(digest, hash->digest_size); hash->digest(state, hash->digest_size, digest); |