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Allow ic + mlen to overflow a size_t in chacha20_ietf_xor_ic()

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This commit is contained in:
Frank Denis 2018-09-12 08:40:22 +02:00
parent bea8839c6b
commit 43909c1ffb
1 changed files with 1 additions and 1 deletions
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src/libsodium/crypto_stream/chacha20/stream_chacha20.c
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@ -133,7 +133,7 @@ crypto_stream_chacha20_ietf_xor_ic(unsigned char *c, const unsigned char *m,
const unsigned char *k) const unsigned char *k)
{ {
if ((unsigned long long) ic > if ((unsigned long long) ic >
crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX / 64ULL - (mlen + 63ULL) / 64ULL) { (64ULL * (1ULL << 32)) / 64ULL - (mlen + 63ULL) / 64ULL) {
sodium_misuse(); sodium_misuse();
} }
return crypto_stream_chacha20_ietf_ext_xor_ic(c, m, mlen, n, ic, k); return crypto_stream_chacha20_ietf_ext_xor_ic(c, m, mlen, n, ic, k);