diff options
Diffstat (limited to 'libkeccak_state_copy.c')
| -rw-r--r-- | libkeccak_state_copy.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/libkeccak_state_copy.c b/libkeccak_state_copy.c index 97a76ef..bf82fa9 100644 --- a/libkeccak_state_copy.c +++ b/libkeccak_state_copy.c @@ -13,9 +13,13 @@ int libkeccak_state_copy(struct libkeccak_state *restrict dest, const struct libkeccak_state *restrict src) { memcpy(dest, src, sizeof(struct libkeccak_state)); - dest->M = malloc(src->mlen * sizeof(char)); - if (!dest->M) - return -1; - memcpy(dest->M, src->M, src->mptr * sizeof(char)); + if (src->mlen) { + dest->M = malloc(src->mlen * sizeof(char)); + if (!dest->M) + return -1; + memcpy(dest->M, src->M, src->mptr * sizeof(char)); + } else { + dest->M = NULL; + } return 0; } |