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Fix for AES GCM Decrypt auth tag. ZD 9507

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David Garske
2019-11-18 06:46:50 -08:00
parent b676c69561
commit 7e17904c54
1 changed files with 1 additions and 1 deletions
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wolfcrypt/src/aes.c
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@@ -6054,7 +6054,7 @@ static int wc_AesGcmDecrypt_STM32(Aes* aes, byte* out,
#endif /* WOLFSSL_STM32_CUBEMX */
/* STM32 GCM hardware only supports IV of 12 bytes, so use software for auth */
if (sz == 0 || partial != 0 || ivSz != GCM_NONCE_MID_SZ) {
if (sz == 0 || ivSz != GCM_NONCE_MID_SZ) {
DecrementGcmCounter(ctr); /* hardware requires +1, so subtract it */
GHASH(aes, authIn, authInSz, in, sz, tag, sizeof(tag));
wc_AesEncrypt(aes, ctr, partialBlock);