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diff --git a/lib/algorithms/mac.c b/lib/algorithms/mac.c
index 0527ca4f1..a39acd49f 100644
--- a/lib/algorithms/mac.c
+++ b/lib/algorithms/mac.c
@@ -37,9 +37,9 @@ static const mac_entry_st hash_algorithms[] = {
{"SHA256", HASH_OID_SHA256, MAC_OID_SHA256, GNUTLS_MAC_SHA256, 32, 32, 0, 0, 1,
64},
{"SHA384", HASH_OID_SHA384, MAC_OID_SHA384, GNUTLS_MAC_SHA384, 48, 48, 0, 0, 1,
- 64},
+ 128},
{"SHA512", HASH_OID_SHA512, MAC_OID_SHA512, GNUTLS_MAC_SHA512, 64, 64, 0, 0, 1,
- 64},
+ 128},
{"SHA224", HASH_OID_SHA224, MAC_OID_SHA224, GNUTLS_MAC_SHA224, 28, 28, 0, 0, 1,
64},
{"UMAC-96", NULL, NULL, GNUTLS_MAC_UMAC_96, 12, 16, 8, 0, 1, 0},
diff --git a/lib/gnutls_cipher.c b/lib/gnutls_cipher.c
index 58ce79775..37478a4c3 100644
--- a/lib/gnutls_cipher.c
+++ b/lib/gnutls_cipher.c
@@ -440,7 +440,7 @@ static void dummy_wait(record_parameters_st * params,
{
/* this hack is only needed on CBC ciphers */
if (_gnutls_cipher_is_block(params->cipher) == CIPHER_BLOCK) {
- unsigned len;
+ unsigned len, v;
/* force an additional hash compression function evaluation to prevent timing
* attacks that distinguish between wrong-mac + correct pad, from wrong-mac + incorrect pad.
@@ -448,11 +448,14 @@ static void dummy_wait(record_parameters_st * params,
if (pad_failed == 0 && pad > 0) {
len = _gnutls_mac_block_size(params->mac);
if (len > 0) {
- /* This is really specific to the current hash functions.
- * It should be removed once a protocol fix is in place.
- */
- if ((pad + total) % len > len - 9
- && total % len <= len - 9) {
+ if (params->mac && params->mac->id == GNUTLS_MAC_SHA384)
+ /* v = 1 for the hash function padding + 16 for message length */
+ v = 17;
+ else /* v = 1 for the hash function padding + 8 for message length */
+ v = 9;
+
+ if ((pad + total) % len > len - v
+ && total % len <= len - v) {
if (len < plaintext->size)
_gnutls_auth_cipher_add_auth
(&params->read.
--
2.14.3