diff options
Diffstat (limited to 'hmac_init.c')
| -rw-r--r-- | hmac_init.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hmac_init.c b/hmac_init.c index 4aee2c2..17b31ce 100644 --- a/hmac_init.c +++ b/hmac_init.c @@ -20,6 +20,10 @@ libsha2_hmac_init(struct libsha2_hmac_state *restrict state, enum libsha2_algori state->sha2_state.algorithm = algorithm; state->outsize = libsha2_algorithm_output_size(algorithm) * 8; + if (!state->outsize) { + errno = EINVAL; + return -1; + } state->inited = 0; if (keylen <= state->sha2_state.chunk_size * 8) { |