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Add generic crypt_generate_volume_key function.

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So that we can generate keys with different 'quality'
attribute at one place.
This commit is contained in:
Ondrej Kozina
2025-01-29 14:40:43 +01:00
parent 4f90213a5b
commit 1326dfbac1
3 changed files with 32 additions and 10 deletions
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25
lib/volumekey.c
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@@ -126,7 +126,8 @@ void crypt_free_volume_key(struct volume_key *vk)
}
}
struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, size_t keylength)
struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, size_t keylength,
key_quality_info quality)
{
int r;
struct volume_key *vk;
@@ -135,10 +136,24 @@ struct volume_key *crypt_generate_volume_key(struct crypt_device *cd, size_t key
if (!vk)
return NULL;
r = crypt_random_get(cd, vk->key, keylength, CRYPT_RND_KEY);
if(r < 0) {
crypt_free_volume_key(vk);
return NULL;
switch (quality) {
case KEY_QUALITY_KEY:
r = crypt_random_get(cd, vk->key, keylength, CRYPT_RND_KEY);
break;
case KEY_QUALITY_NORMAL:
r = crypt_random_get(cd, vk->key, keylength, CRYPT_RND_NORMAL);
break;
case KEY_QUALITY_EMPTY:
r = 0;
break;
default:
abort();
}
if (r) {
crypt_free_volume_key(vk);
vk = NULL;
}
return vk;
}