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crypto: use software AES based on the MONERO_USE_SOFTWARE_AES env var

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Setting to no or 0 also works. If set, any other value enables it.

Useful for running with valgrind in cases where it fails at
properly implementing AES-NI.
This commit is contained in:
moneromooo-monero 2016-02-09 09:29:12 +00:00
parent 24ccdb9b6e
commit 74aef213fe
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GPG key ID: 686F07454D6CEFC3
1 changed files with 11 additions and 1 deletions
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12
src/crypto/slow-hash.c
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@ -187,6 +187,16 @@ STATIC INLINE void xor_blocks(uint8_t *a, const uint8_t *b)
* @return true if the CPU supports AES, false otherwise * @return true if the CPU supports AES, false otherwise
*/ */
STATIC INLINE int force_software_aes(void)
{
const char *env = getenv("MONERO_USE_SOFTWARE_AES");
if (!env)
return 0;
if (!strcmp(env, "0") || !strcmp(env, "no"))
return 0;
return 1;
}
STATIC INLINE int check_aes_hw(void) STATIC INLINE int check_aes_hw(void)
{ {
int cpuid_results[4]; int cpuid_results[4];
@ -509,7 +519,7 @@ void cn_slow_hash(const void *data, size_t length, char *hash)
size_t i, j; size_t i, j;
uint64_t *p = NULL; uint64_t *p = NULL;
oaes_ctx *aes_ctx; oaes_ctx *aes_ctx;
int useAes = check_aes_hw(); int useAes = !force_software_aes() && check_aes_hw();
static void (*const extra_hashes[4])(const void *, size_t, char *) = static void (*const extra_hashes[4])(const void *, size_t, char *) =
{ {