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Fix ShaFinal overrun.

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jordan
2024-02-03 17:36:26 -06:00
parent d111d7da1b
commit 83169f91e9
1 changed files with 4 additions and 1 deletions
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5
wolfcrypt/src/sha.c
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@ -841,7 +841,10 @@ int wc_ShaFinal(wc_Sha* sha, byte* hash)
/* pad with zeros */ /* pad with zeros */
if (sha->buffLen > WC_SHA_PAD_SIZE) { if (sha->buffLen > WC_SHA_PAD_SIZE) {
XMEMSET(&local[sha->buffLen], 0, WC_SHA_BLOCK_SIZE - sha->buffLen); if (sha->buffLen < WC_SHA_BLOCK_SIZE) {
XMEMSET(&local[sha->buffLen], 0, WC_SHA_BLOCK_SIZE - sha->buffLen);
}
sha->buffLen += WC_SHA_BLOCK_SIZE - sha->buffLen; sha->buffLen += WC_SHA_BLOCK_SIZE - sha->buffLen;
#if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW) #if defined(WOLFSSL_USE_ESP32_CRYPT_HASH_HW)