diff options
Diffstat (limited to 'sse/blake2b.c')
| -rw-r--r-- | sse/blake2b.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sse/blake2b.c b/sse/blake2b.c index 2d4a17b..1eba735 100644 --- a/sse/blake2b.c +++ b/sse/blake2b.c @@ -79,6 +79,11 @@ static inline int blake2b_clear_lastnode( blake2b_state *S ) return 0; } +static inline int blake2b_is_lastblock( const blake2b_state *S ) +{ + return S->f[0] != 0; +} + static inline int blake2b_set_lastblock( blake2b_state *S ) { if( S->last_node ) blake2b_set_lastnode( S ); @@ -355,6 +360,9 @@ int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen ) if( outlen > BLAKE2B_OUTBYTES ) return -1; + if( blake2b_is_lastblock( S ) ) + return -1; + if( S->buflen > BLAKE2B_BLOCKBYTES ) { blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES ); |