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hmac: add missing ForceZero for tmp, prk.

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jordan
2026-03-05 14:24:20 -06:00
parent 36328e31a5
commit dd2c5a7d2e
1 changed files with 7 additions and 5 deletions
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wolfcrypt/src/hmac.c
+7 -5
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@@ -1679,6 +1679,7 @@ int wolfSSL_GetHmacMaxSize(void)
n++;
}
ForceZero(tmp, WC_MAX_DIGEST_SIZE);
wc_HmacFree(myHmac);
WC_FREE_VAR_EX(myHmac, NULL, DYNAMIC_TYPE_HMAC);
@@ -1734,11 +1735,12 @@ int wolfSSL_GetHmacMaxSize(void)
ret = wc_HKDF_Extract_ex(type, salt, saltSz, inKey, inKeySz, prk, heap,
devId);
if (ret != 0)
return ret;
return wc_HKDF_Expand_ex(type, prk, hashSz, info, infoSz, out, outSz,
heap, devId);
if (ret == 0) {
ret = wc_HKDF_Expand_ex(type, prk, hashSz, info, infoSz,
out, outSz, heap, devId);
}
ForceZero(prk, WC_MAX_DIGEST_SIZE);
return ret;
}
int wc_HKDF(int type, const byte* inKey, word32 inKeySz, const byte* salt,