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align AES key if needed when using MMCAU classic

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This commit is contained in:
Chris Conlon
2019-10-18 14:02:43 -06:00
parent 0e73af8b88
commit c4afbb3685
1 changed files with 28 additions and 3 deletions
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31
wolfcrypt/src/aes.c
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@ -1917,7 +1917,9 @@ static void wc_AesDecrypt(Aes* aes, const byte* inBlock, byte* outBlock)
const byte* iv, int dir)
{
int ret;
byte *rk = (byte*)aes->key;
byte* rk = (byte*)aes->key;
byte* tmpKey = (byte*)userKey;
int tmpKeyDynamic = 0;
(void)dir;
@ -1933,18 +1935,41 @@ static void wc_AesDecrypt(Aes* aes, const byte* inBlock, byte* outBlock)
aes->rounds = keylen/4 + 6;
#ifdef FREESCALE_MMCAU_CLASSIC
if ((wolfssl_word)userKey % WOLFSSL_MMCAU_ALIGNMENT) {
#ifndef NO_WOLFSSL_ALLOC_ALIGN
byte* tmp = (byte*)XMALLOC(keylen + WOLFSSL_MMCAU_ALIGNMENT,
aes->heap, DYNAMIC_TYPE_TMP_BUFFER);
if (tmp == NULL) {
return MEMORY_E;
}
tmpKey = tmp + (WOLFSSL_MMCAU_ALIGNMENT -
((wolfssl_word)tmp % WOLFSSL_MMCAU_ALIGNMENT));
XMEMCPY(tmpKey, userKey, keylen);
tmpKeyDynamic = 1;
#else
WOLFSSL_MSG("Bad cau_aes_set_key alignment");
return BAD_ALIGN_E;
#endif
}
#endif
ret = wolfSSL_CryptHwMutexLock();
if(ret == 0) {
#ifdef FREESCALE_MMCAU_CLASSIC
cau_aes_set_key(userKey, keylen*8, rk);
cau_aes_set_key(tmpKey, keylen*8, rk);
#else
MMCAU_AES_SetKey(userKey, keylen, rk);
MMCAU_AES_SetKey(tmpKey, keylen, rk);
#endif
wolfSSL_CryptHwMutexUnLock();
ret = wc_AesSetIV(aes, iv);
}
if (tmpKeyDynamic == 1) {
XFREE(tmpKey, aes->heap, DYNAMIC_TYPE_TMP_BUFFER);
}
return ret;
}