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keccak: fix mdlen bounds sanity checking

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found by h908714124
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moneromooo-monero 2018-02-07 13:39:32 +00:00
parent 2e3e90acbe
commit e4646379a6
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GPG key ID: 686F07454D6CEFC3
1 changed files with 2 additions and 1 deletions
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3
src/crypto/keccak.c
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@ -81,7 +81,8 @@ void keccak(const uint8_t *in, size_t inlen, uint8_t *md, int mdlen)
uint8_t temp[144]; uint8_t temp[144];
size_t i, rsiz, rsizw; size_t i, rsiz, rsizw;
if (mdlen <= 0 || mdlen > 200 || sizeof(st) != 200) static_assert(HASH_DATA_AREA <= sizeof(temp), "Bad keccak preconditions");
if (mdlen <= 0 || (mdlen > 100 && sizeof(st) != (size_t)mdlen))
{ {
fprintf(stderr, "Bad keccak use"); fprintf(stderr, "Bad keccak use");
abort(); abort();