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In blake2b_final() the leftover shouldn't exceed two blocks

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This commit is contained in:
Frank Denis 2015-11-08 23:17:57 +01:00
parent 8986a95fd8
commit 49e160a165
1 changed files with 3 additions and 1 deletions
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4
src/libsodium/crypto_generichash/blake2/ref/blake2b-ref.c
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@ -11,6 +11,7 @@
this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
@ -319,7 +320,8 @@ int blake2b_final( blake2b_state *S, uint8_t *out, uint8_t outlen )
blake2b_increment_counter( S, BLAKE2B_BLOCKBYTES );
blake2b_compress( S, S->buf );
S->buflen -= BLAKE2B_BLOCKBYTES;
memmove( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
assert( S->buflen <= BLAKE2B_BLOCKBYTES );
memcpy( S->buf, S->buf + BLAKE2B_BLOCKBYTES, S->buflen );
}
blake2b_increment_counter( S, S->buflen );