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Fix keylength = 0 (no key) case.

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This commit is contained in:
Milan Broz
2016-07-02 22:42:40 +02:00
parent 7dbb47f76a
commit c8da0a76aa
1 changed files with 9 additions and 5 deletions
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6
lib/volumekey.c
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@@ -29,7 +29,7 @@ struct volume_key *crypt_alloc_volume_key(size_t keylength, const char *key)
{
struct volume_key *vk;
if (!keylength || keylength > (SIZE_MAX - sizeof(*vk)))
if (keylength > (SIZE_MAX - sizeof(*vk)))
return NULL;
vk = malloc(sizeof(*vk) + keylength);
@@ -37,10 +37,14 @@ struct volume_key *crypt_alloc_volume_key(size_t keylength, const char *key)
return NULL;
vk->keylength = keylength;
/* keylength 0 is valid => no key */
if (vk->keylength) {
if (key)
memcpy(&vk->key, key, keylength);
else
crypt_memzero(&vk->key, keylength);
}
return vk;
}