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Implement proper wc_AesSetKeyLocal for NXP/Freescale MMCAU and LTC. This is required for AES CTR and AES Direct.

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This commit is contained in:
David Garske 2023-11-14 11:25:41 -08:00
parent 3fa612f49f
commit 7566328610
1 changed files with 30 additions and 9 deletions
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39
wolfcrypt/src/aes.c
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@ -475,7 +475,7 @@ block cipher mechanism that uses n-bit binary string parameter key with 128-bits
/* We'll use SW for fallback:
* unsupported key lengths. (e.g. ESP32-S3)
* chipsets not ikmplemented.
* chipsets not implemented.
* hardware busy. */
#define NEED_AES_TABLES
#define NEED_AES_HW_FALLBACK
@ -3586,12 +3586,18 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(
return 0;
}
#elif defined(FREESCALE_LTC)
int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen, const byte* iv,
int dir)
int wc_AesSetKeyLocal(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir, int checkKeyLen)
{
if (aes == NULL || !((keylen == 16) || (keylen == 24) || (keylen == 32)))
if (aes == NULL)
return BAD_FUNC_ARG;
if (checkKeyLen) {
if (!((keylen == 16) || (keylen == 24) || (keylen == 32)))
return BAD_FUNC_ARG;
}
(void)dir;
aes->rounds = keylen/4 + 6;
XMEMCPY(aes->key, userKey, keylen);
@ -3603,15 +3609,21 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(
return wc_AesSetIV(aes, iv);
}
int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
{
return wc_AesSetKeyLocal(aes, userKey, keylen, iv, dir, 1);
}
int wc_AesSetKeyDirect(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
{
return wc_AesSetKey(aes, userKey, keylen, iv, dir);
}
#elif defined(FREESCALE_MMCAU)
#define NEED_SOFTWARE_AES_SETKEY
int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
int wc_AesSetKeyLocal(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir, int checkKeyLen)
{
int ret;
byte* rk;
@ -3621,11 +3633,14 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(
(void)dir;
if (!((keylen == 16) || (keylen == 24) || (keylen == 32)))
return BAD_FUNC_ARG;
if (aes == NULL)
return BAD_FUNC_ARG;
if (checkKeyLen) {
if (!((keylen == 16) || (keylen == 24) || (keylen == 32)))
return BAD_FUNC_ARG;
}
rk = (byte*)aes->key;
if (rk == NULL)
return BAD_FUNC_ARG;
@ -3676,6 +3691,12 @@ static WARN_UNUSED_RESULT int wc_AesDecrypt(
return ret;
}
int wc_AesSetKey(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
{
return wc_AesSetKeyLocal(aes, userKey, keylen, iv, dir, 1);
}
int wc_AesSetKeyDirect(Aes* aes, const byte* userKey, word32 keylen,
const byte* iv, int dir)
{