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In NXP DCP port clear key buffer after use

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JacobBarthelmeh
2026-05-12 10:44:21 -06:00
parent dc56e87522
commit 999e1b9f99
1 changed files with 5 additions and 2 deletions
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wolfcrypt/src/port/nxp/dcp_port.c
+5 -2
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@@ -205,14 +205,16 @@ int DCPAesInit(Aes *aes)
return 0;
}
static unsigned char aes_key_aligned[16] __attribute__((aligned(0x10)));
void DCPAesFree(Aes *aes)
{
ForceZero(aes_key_aligned, sizeof(aes_key_aligned));
dcp_free(aes->handle.channel);
aes->handle.channel = 0;
}
static unsigned char aes_key_aligned[16] __attribute__((aligned(0x10)));
int DCPAesSetKey(Aes* aes, const byte* key, word32 len, const byte* iv,
int dir)
{
@@ -231,8 +233,9 @@ int DCPAesSetKey(Aes* aes, const byte* key, word32 len, const byte* iv,
return WC_HW_E;
}
dcp_lock();
memcpy(aes_key_aligned, key, 16);
XMEMCPY(aes_key_aligned, key, 16);
status = DCP_AES_SetKey(DCP, &aes->handle, aes_key_aligned, 16);
ForceZero(aes_key_aligned, sizeof(aes_key_aligned));
if (status != kStatus_Success)
status = WC_HW_E;
else {