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Fix for TLS HMAC constant timing to ensure final is called for dummy operations. Added devCtx to AES for CryptoCb.

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This commit is contained in:
David Garske
2019-02-06 13:32:10 -08:00
parent dcdb1d7094
commit 454687f429
3 changed files with 12 additions and 2 deletions
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3
src/tls.c
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@ -1112,6 +1112,9 @@ static int Hmac_UpdateFinal(Hmac* hmac, byte* digest, const byte* in,
if (ret != 0) if (ret != 0)
break; break;
} }
/* call final to cleanup */
if (ret == 0)
ret = wc_HmacFinal(hmac, dummy);
} }
return ret; return ret;

4
wolfcrypt/src/aes.c
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@ -6528,6 +6528,7 @@ int wc_AesInit(Aes* aes, void* heap, int devId)
#ifdef WOLF_CRYPTO_CB #ifdef WOLF_CRYPTO_CB
aes->devId = devId; aes->devId = devId;
aes->devCtx = NULL;
#else #else
(void)devId; (void)devId;
#endif #endif
@ -6589,6 +6590,9 @@ void wc_AesFree(Aes* aes)
#if defined(WOLFSSL_DEVCRYPTO) && \ #if defined(WOLFSSL_DEVCRYPTO) && \
(defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC)) (defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC))
wc_DevCryptoFree(&aes->ctx); wc_DevCryptoFree(&aes->ctx);
#endif
#if defined(WOLF_CRYPTO_CB) || (defined(WOLFSSL_DEVCRYPTO) && \
(defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC)))
ForceZero((byte*)aes->devKey, AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE); ForceZero((byte*)aes->devKey, AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE);
#endif #endif
} }

7
wolfssl/wolfcrypt/aes.h
View File

@ -152,7 +152,7 @@ typedef struct Aes {
#endif /* WOLFSSL_AESNI */ #endif /* WOLFSSL_AESNI */
#ifdef WOLF_CRYPTO_CB #ifdef WOLF_CRYPTO_CB
int devId; int devId;
word32 devKey[AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE/sizeof(word32)]; /* raw key */ void* devCtx;
#endif #endif
#ifdef HAVE_PKCS11 #ifdef HAVE_PKCS11
byte id[AES_MAX_ID_LEN]; byte id[AES_MAX_ID_LEN];
@ -182,9 +182,12 @@ typedef struct Aes {
GCM_NONCE_MID_SZ)]; GCM_NONCE_MID_SZ)];
#endif #endif
#endif #endif
#if defined(WOLF_CRYPTO_CB) || (defined(WOLFSSL_DEVCRYPTO) && \
(defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC)))
word32 devKey[AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE/sizeof(word32)]; /* raw key */
#endif
#if defined(WOLFSSL_DEVCRYPTO) && \ #if defined(WOLFSSL_DEVCRYPTO) && \
(defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC)) (defined(WOLFSSL_DEVCRYPTO_AES) || defined(WOLFSSL_DEVCRYPTO_CBC))
word32 devKey[AES_MAX_KEY_SIZE/WOLFSSL_BIT_SIZE/sizeof(word32)]; /* raw key */
WC_CRYPTODEV ctx; WC_CRYPTODEV ctx;
#endif #endif
void* heap; /* memory hint to use */ void* heap; /* memory hint to use */