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Fold read_and_install_user_ce_key() into fscrypt_unlock_user_key()

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No change in behavior, except for removing a redundant check of
's_ce_policies.count(user_id)' and removing an extra ERROR message.

Ignore-AOSP-First: Conflicts. Will cherry-pick after Android 14 push...
Test: see I7f11a135d8550618cd96013f834cebd54be5ef84
Change-Id: If221e23991e8e04138ae7dbdafe8160b00893655
This commit is contained in:
Eric Biggers 2023-08-01 19:34:53 +00:00
parent 6aa71214d5
commit 92428b247f
1 changed files with 12 additions and 23 deletions
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25
FsCrypt.cpp
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@ -316,18 +316,6 @@ static bool get_volume_file_encryption_options(EncryptionOptions* options) {
return true;
}
static bool read_and_install_user_ce_key(userid_t user_id,
const android::vold::KeyAuthentication& auth) {
if (s_ce_policies.count(user_id) != 0) return true;
KeyBuffer ce_key;
if (!read_and_fixate_user_ce_key(user_id, auth, &ce_key)) return false;
EncryptionPolicy ce_policy;
if (!install_storage_key(DATA_MNT_POINT, s_data_options, ce_key, &ce_policy)) return false;
s_ce_policies[user_id] = ce_policy;
LOG(DEBUG) << "Installed ce key for user " << user_id;
return true;
}
// Prepare a directory without assigning it an encryption policy. The directory
// will inherit the encryption policy of its parent directory, or will be
// unencrypted if the parent directory is unencrypted.
@ -896,18 +884,19 @@ std::vector<int> fscrypt_get_unlocked_users() {
// TODO: rename to 'install' for consistency, and take flags to know which keys to install
bool fscrypt_unlock_user_key(userid_t user_id, int serial, const std::string& secret_hex) {
LOG(DEBUG) << "fscrypt_unlock_user_key " << user_id << " serial=" << serial;
if (IsFbeEnabled()) {
if (!IsFbeEnabled()) return true;
if (s_ce_policies.count(user_id) != 0) {
LOG(WARNING) << "Tried to unlock already-unlocked key for user " << user_id;
return true;
}
auto auth = authentication_from_hex(secret_hex);
if (!auth) return false;
if (!read_and_install_user_ce_key(user_id, *auth)) {
LOG(ERROR) << "Couldn't read key for " << user_id;
return false;
}
}
KeyBuffer ce_key;
if (!read_and_fixate_user_ce_key(user_id, *auth, &ce_key)) return false;
EncryptionPolicy ce_policy;
if (!install_storage_key(DATA_MNT_POINT, s_data_options, ce_key, &ce_policy)) return false;
s_ce_policies[user_id] = ce_policy;
LOG(DEBUG) << "Installed ce key for user " << user_id;
return true;
}