int dek_encrypt_dek_efs(int persona_id, dek *plainDek, dek *encDek) {
if (!dek_is_persona(persona_id)) {
return -EFAULT;
}
return dek_encrypt_dek(persona_id, plainDek, encDek);
}
static long dek_do_ioctl_evt(unsigned int minor, unsigned int cmd,
unsigned long arg) {
long ret = 0;
void __user *ubuf = (void __user *)arg;
void *cleanup = NULL;
switch (cmd) {
/*
* Event while booting.
*
* This event comes per persona, the driver is responsible to
* verify things good whether it's compromised.
*/
case DEK_ON_BOOT: {
dek_arg_on_boot *evt = kzalloc(sizeof(dek_arg_on_boot), GFP_KERNEL);
cleanup = evt;
printk("dek: DEK_ON_BOOT\n");
//memset(&evt, 0, sizeof(dek_arg_on_boot));
if(copy_from_user(evt, ubuf, sizeof(dek_arg_on_boot))) {
printk("dek: can't copy from user\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt->persona_id)) {
ret = -EFAULT;
goto err;
}
ret = dek_on_boot(evt);
if (ret < 0) {
dek_add_to_log(evt->persona_id, "Boot failed");
goto err;
}
dek_add_to_log(evt->persona_id, "Booted");
break;
}
/*
* Event when device is locked.
*
* Nullify private key which prevents decryption.
*/
case DEK_ON_DEVICE_LOCKED: {
//dek_arg_on_device_locked evt;
dek_arg_on_device_locked *evt = kzalloc(sizeof(dek_arg_on_device_locked), GFP_KERNEL);
cleanup = evt;
printk("dek: DEK_ON_DEVICE_LOCKED\n");
//memset(&evt, 0, sizeof(dek_arg_on_device_locked));
if(copy_from_user(evt, ubuf, sizeof(dek_arg_on_device_locked))) {
printk("dek: can't copy from user\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt->persona_id)) {
ret = -EFAULT;
goto err;
}
ret = dek_on_device_locked(evt);
if (ret < 0) {
dek_add_to_log(evt->persona_id, "Lock failed");
goto err;
}
dek_add_to_log(evt->persona_id, "Locked");
printk("dek: after locked for id: %d\n", evt->persona_id);
break;
}
/*
* Event when device unlocked.
*
* Read private key and decrypt with user password.
*/
case DEK_ON_DEVICE_UNLOCKED: {
//dek_arg_on_device_unlocked evt;
dek_arg_on_device_unlocked *evt = kzalloc(sizeof(dek_arg_on_device_unlocked), GFP_KERNEL);
cleanup = evt;
printk("dek: DEK_ON_DEVICE_UNLOCKED\n");
//memset(&evt, 0, sizeof(dek_arg_on_device_unlocked));
if(copy_from_user(evt, ubuf, sizeof(dek_arg_on_device_unlocked))) {
printk("dek: can't copy from user\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt->persona_id)) {
ret = -EFAULT;
goto err;
}
ret = dek_on_device_unlocked(evt);
if (ret < 0) {
dek_add_to_log(evt->persona_id, "Unlock failed");
goto err;
}
dek_add_to_log(evt->persona_id, "Unlocked");
memset(evt, 0, sizeof(dek_arg_on_device_unlocked));
break;
}
/*
* Event when new user(persona) added.
*
* Generate RSA public key and encrypt private key with given
* password. Also pub-key and encryped priv-key have to be stored
* in a file system.
*/
case DEK_ON_USER_ADDED: {
//dek_arg_on_user_added evt;
dek_arg_on_user_added *evt = kzalloc(sizeof(dek_arg_on_user_added), GFP_KERNEL);
cleanup = evt;
printk("dek: DEK_ON_USER_ADDED\n");
//memset(&evt, 0, sizeof(dek_arg_on_user_added));
if(copy_from_user(evt, ubuf, sizeof(dek_arg_on_user_added))) {
printk("dek: can't copy from user\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt->persona_id)) {
ret = -EFAULT;
goto err;
}
ret = dek_on_user_added(evt);
if (ret < 0) {
dek_add_to_log(evt->persona_id, "Add user failed");
goto err;
}
dek_add_to_log(evt->persona_id, "Added user");
break;
}
/*
* Event when user is removed.
*
* Remove pub-key file & encrypted priv-key file.
*/
case DEK_ON_USER_REMOVED: {
dek_arg_on_user_removed evt;
printk("dek: DEK_ON_USER_REMOVED\n");
memset(&evt, 0, sizeof(dek_arg_on_user_removed));
if(copy_from_user(&evt, ubuf, sizeof(evt))) {
printk("dek: can't copy from user\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt.persona_id)) {
ret = -EFAULT;
goto err;
}
ret = dek_on_user_removed(&evt);
if (ret < 0) {
dek_add_to_log(evt.persona_id, "Remove user failed");
goto err;
}
dek_add_to_log(evt.persona_id, "Removed user");
break;
}
/*
* Event when password changed.
*
* Encrypt priv_key with new password and store it.
*/
case DEK_ON_CHANGE_PASSWORD: {
printk("dek: DEK_ON_CHANGE_PASSWORD << deprecated. SKIP\n");
ret = 0;
dek_add_to_log(0, "Changed password << deprecated");
break;
}
default:
printk("dek: case default\n");
ret = -EINVAL;
break;
}
err:
if (cleanup) {
kfree(cleanup);
}
return ret;
}
static long dek_do_ioctl_evt(unsigned int minor, unsigned int cmd,
unsigned long arg) {
long ret = 0;
void __user *ubuf = (void __user *)arg;
void *cleanup = NULL;
unsigned int size;
switch (cmd) {
/*
* Event while booting.
*
* This event comes per persona, the driver is responsible to
* verify things good whether it's compromised.
*/
case DEK_ON_BOOT: {
dek_arg_on_boot *evt = kzalloc(sizeof(dek_arg_on_boot), GFP_KERNEL);
DEK_LOGD("DEK_ON_BOOT\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_boot);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
ret = dek_on_boot(evt);
if (ret < 0) {
dek_add_to_log(evt->userid, "Boot failed");
goto err;
}
dek_add_to_log(evt->userid, "Booted");
break;
}
/*
* Event when device is locked.
*
* Nullify private key which prevents decryption.
*/
case DEK_ON_DEVICE_LOCKED: {
dek_arg_on_device_locked *evt = kzalloc(sizeof(dek_arg_on_device_locked), GFP_KERNEL);
DEK_LOGD("DEK_ON_DEVICE_LOCKED\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_device_locked);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
ret = dek_on_device_locked(evt);
if (ret < 0) {
dek_add_to_log(evt->userid, "Lock failed");
goto err;
}
dek_add_to_log(evt->userid, "Locked");
break;
}
/*
* Event when device unlocked.
*
* Read private key and decrypt with user password.
*/
case DEK_ON_DEVICE_UNLOCKED: {
dek_arg_on_device_unlocked *evt = kzalloc(sizeof(dek_arg_on_device_unlocked), GFP_KERNEL);
DEK_LOGD("DEK_ON_DEVICE_UNLOCKED\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_device_unlocked);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
ret = dek_on_device_unlocked(evt);
if (ret < 0) {
dek_add_to_log(evt->userid, "Unlock failed");
goto err;
}
dek_add_to_log(evt->userid, "Unlocked");
break;
}
/*
* Event when new user(persona) added.
*
* Generate RSA public key and encrypt private key with given
* password. Also pub-key and encryped priv-key have to be stored
* in a file system.
*/
case DEK_ON_USER_ADDED: {
dek_arg_on_user_added *evt = kzalloc(sizeof(dek_arg_on_user_added), GFP_KERNEL);
DEK_LOGD("DEK_ON_USER_ADDED\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_user_added);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
ret = dek_on_user_added(evt);
if (ret < 0) {
dek_add_to_log(evt->userid, "Add user failed");
goto err;
}
dek_add_to_log(evt->userid, "Added user");
break;
}
/*
* Event when user is removed.
*
* Remove pub-key file & encrypted priv-key file.
*/
case DEK_ON_USER_REMOVED: {
dek_arg_on_user_removed *evt = kzalloc(sizeof(dek_arg_on_user_removed), GFP_KERNEL);
DEK_LOGD("DEK_ON_USER_REMOVED\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_user_removed);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
ret = dek_on_user_removed(evt);
if (ret < 0) {
dek_add_to_log(evt->userid, "Remove user failed");
goto err;
}
dek_add_to_log(evt->userid, "Removed user");
break;
}
/*
* Event when password changed.
*
* Encrypt SDPK_Rpri with new password and store it.
*/
case DEK_ON_CHANGE_PASSWORD: {
DEK_LOGD("DEK_ON_CHANGE_PASSWORD << deprecated. SKIP\n");
ret = 0;
dek_add_to_log(0, "Changed password << deprecated");
break;
}
case DEK_DISK_CACHE_CLEANUP: {
dek_arg_disk_cache_cleanup *evt = kzalloc(sizeof(dek_arg_disk_cache_cleanup), GFP_KERNEL);
DEK_LOGD("DEK_DISK_CACHE_CLEANUP\n");
if (evt == NULL) {
ret = -ENOMEM;
goto err;
}
cleanup = evt;
size = sizeof(dek_arg_on_user_removed);
if(copy_from_user(evt, ubuf, size)) {
DEK_LOGE("can't copy from user evt\n");
ret = -EFAULT;
goto err;
}
if (!dek_is_persona(evt->userid)) {
DEK_LOGE("%s invalid userid %d\n", __func__, evt->userid);
ret = -EFAULT;
goto err;
}
ecryptfs_mm_drop_cache(evt->userid);
ret = 0;
dek_add_to_log(evt->userid, "Disk cache clean up");
break;
}
default:
DEK_LOGE("%s case default\n", __func__);
ret = -EINVAL;
break;
}
err:
if (cleanup) {
zero_out((char *)cleanup, size);
kfree(cleanup);
}
return ret;
}
static int dek_decrypt_dek(int userid, dek_t *encDek, dek_t *plainDek) {
int key_arr_idx;
int dek_type = encDek->type;
if (!dek_is_persona(userid)) {
DEK_LOGE("%s invalid userid %d\n", __func__, userid);
return -EFAULT;
}
key_arr_idx = PERSONA_KEY_ARR_IDX(userid);
#if DEK_DEBUG
DEK_LOGD("encDek from user: "******"aes decrypt failed\n");
dek_add_to_log(userid, "aes decrypt failed");
plainDek->len = 0;
} else {
plainDek->len = encDek->len;
plainDek->type = DEK_TYPE_PLAIN;
}
} else {
DEK_LOGE("no SDPK_sym key for id: %d\n", userid);
dek_add_to_log(userid, "decrypt failed, persona locked");
return -EIO;
}
return 0;
}
case DEK_TYPE_RSA_ENC:
{
#ifdef CONFIG_PUB_CRYPTO
if(SDPK_Rpri[key_arr_idx].len > 0) {
if(rsa_decryptByPair(encDek, plainDek, &SDPK_Rpri[key_arr_idx])){
DEK_LOGE("rsa_decryptByPair failed");
return -1;
}
}else{
DEK_LOGE("SDPK_Rpri for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_Rpri");
return -EIO;
}
#else
DEK_LOGE("Not supported key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, DH type not supported");
return -EOPNOTSUPP;
#endif
return 0;
}
case DEK_TYPE_DH_ENC:
{
#ifdef CONFIG_PUB_CRYPTO
if(SDPK_Dpri[key_arr_idx].len > 0) {
if(dh_decryptEDEK(encDek, plainDek, &SDPK_Dpri[key_arr_idx])){
DEK_LOGE("dh_decryptEDEK failed");
return -1;
}
}else{
DEK_LOGE("SDPK_Dpri for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_Dpri");
return -EIO;
}
#else
DEK_LOGE("Not supported key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, DH type not supported");
return -EOPNOTSUPP;
#endif
return 0;
}
case DEK_TYPE_ECDH256_ENC:
{
#ifdef CONFIG_PUB_CRYPTO
#if DEK_DEBUG
printk("DEK_TYPE_ECDH256_ENC encDek:"); dek_dump(encDek->buf, encDek->len);
#endif
if(SDPK_EDpri[key_arr_idx].len > 0) {
if(ecdh_decryptEDEK(encDek, plainDek, &SDPK_EDpri[key_arr_idx])){
DEK_LOGE("ecdh_decryptEDEK failed");
return -1;
}
}else{
DEK_LOGE("SDPK_EDpri for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_EDpri");
return -EIO;
}
#else
DEK_LOGE("Not supported key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, ECDH type not supported");
return -EOPNOTSUPP;
#endif
return 0;
}
default:
{
DEK_LOGE("Unsupported edek type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, unsupported key type");
return -EFAULT;
}
}
}
static int dek_encrypt_dek(int userid, dek_t *plainDek, dek_t *encDek) {
int ret = 0;
int key_arr_idx;
if (!dek_is_persona(userid)) {
DEK_LOGE("%s invalid userid %d\n", __func__, userid);
return -EFAULT;
}
key_arr_idx = PERSONA_KEY_ARR_IDX(userid);
#if DEK_DEBUG
DEK_LOGD("plainDek from user: "******"aes encrypt failed\n");
dek_add_to_log(userid, "aes encrypt failed");
encDek->len = 0;
} else {
encDek->len = plainDek->len;
encDek->type = DEK_TYPE_AES_ENC;
}
} else {
#ifdef CONFIG_PUB_CRYPTO
/*
* Do an asymmetric crypto
*/
switch(get_sdp_sysfs_asym_alg()) {
case SDPK_ALGOTYPE_ASYMM_RSA:
if(SDPK_Rpub[key_arr_idx].len > 0) {
ret = rsa_encryptByPub(plainDek, encDek, &SDPK_Rpub[key_arr_idx]);
}else{
DEK_LOGE("SDPK_Rpub for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_Rpub");
return -EIO;
}
break;
case SDPK_ALGOTYPE_ASYMM_DH:
if(SDPK_Dpub[key_arr_idx].len > 0) {
ret = dh_encryptDEK(plainDek, encDek, &SDPK_Dpub[key_arr_idx]);
}else{
DEK_LOGE("SDPK_Dpub for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_Dpub");
return -EIO;
}
break;
case SDPK_ALGOTYPE_ASYMM_ECDH:
if(SDPK_EDpub[key_arr_idx].len > 0) {
ret = ecdh_encryptDEK(plainDek, encDek, &SDPK_EDpub[key_arr_idx]);
}else{
DEK_LOGE("SDPK_EDpub for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_EDpub");
return -EIO;
}
break;
default:
dek_add_to_log(userid, "no ASYMM algo supported");
return -EOPNOTSUPP;
}
#else
DEK_LOGE("pub crypto not supported : %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no key");
return -EOPNOTSUPP;
#endif
}
if (encDek->len <= 0 || encDek->len > DEK_MAXLEN) {
DEK_LOGE("dek_encrypt_dek, incorrect len=%d\n", encDek->len);
zero_out((char *)encDek, sizeof(dek_t));
return -EFAULT;
}
#if DEK_DEBUG
else {
DEK_LOGD("encDek to user: ");
dek_dump(encDek->buf, encDek->len);
}
#endif
return ret;
}
static long dek_do_ioctl_kek(unsigned int minor, unsigned int cmd,
unsigned long arg) {
long ret = 0;
void __user *ubuf = (void __user *)arg;
switch (cmd) {
case DEK_GET_KEK: {
dek_arg_get_kek req;
int requested_type = 0;
int userid;
int key_arr_idx;
DEK_LOGD("DEK_GET_KEK\n");
memset(&req, 0, sizeof(dek_arg_get_kek));
if(copy_from_user(&req, ubuf, sizeof(req))) {
DEK_LOGE("can't copy from user kek\n");
ret = -EFAULT;
goto err;
}
userid = req.userid;
if (!dek_is_persona(userid)) {
DEK_LOGE("%s invalid userid %d\n", __func__, userid);
return -EFAULT;
}
key_arr_idx = PERSONA_KEY_ARR_IDX(userid);
requested_type = req.kek_type;
req.key.len = 0;
req.key.type = -1;
switch(requested_type) {
case KEK_TYPE_SYM:
if (SDPK_sym[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_sym[key_arr_idx], KEK_TYPE_SYM);
DEK_LOGD("SDPK_sym len : %d\n", req.key.len);
}else{
DEK_LOGE("SDPK_sym not-available\n");
ret = -EIO;
goto err;
}
break;
case KEK_TYPE_RSA_PUB:
if (SDPK_Rpub[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_Rpub[key_arr_idx], KEK_TYPE_RSA_PUB);
DEK_LOGD("SDPK_Rpub len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_Rpub not-available\n");
ret = -EIO;
goto err;
}
break;
case KEK_TYPE_RSA_PRIV:
#ifdef CONFIG_SDP_IOCTL_PRIV
if (SDPK_Rpri[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_Rpri[key_arr_idx], KEK_TYPE_RSA_PRIV);
DEK_LOGD("SDPK_Rpri len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_Rpri not-available\n");
ret = -EIO;
goto err;
}
#else
DEK_LOGE("SDPK_Rpri not exposed\n");
ret = -EOPNOTSUPP;
goto err;
#endif
break;
case KEK_TYPE_DH_PUB:
if (SDPK_Dpub[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_Dpub[key_arr_idx], KEK_TYPE_DH_PUB);
DEK_LOGD("SDPK_Dpub len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_Dpub not-available\n");
ret = -EIO;
goto err;
}
break;
case KEK_TYPE_DH_PRIV:
#ifdef CONFIG_SDP_IOCTL_PRIV
if (SDPK_Dpri[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_Dpri[key_arr_idx], KEK_TYPE_DH_PRIV);
DEK_LOGD("SDPK_Dpri len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_Dpri not-available\n");
ret = -EIO;
goto err;
}
#else
DEK_LOGE("SDPK_Dpri not exposed\n");
ret = -EOPNOTSUPP;
goto err;
#endif
break;
case KEK_TYPE_ECDH256_PUB:
if (SDPK_EDpub[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_EDpub[key_arr_idx], KEK_TYPE_ECDH256_PUB);
DEK_LOGD("SDPK_EDpub len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_EDpub not-available\n");
ret = -EIO;
goto err;
}
break;
case KEK_TYPE_ECDH256_PRIV:
#ifdef CONFIG_SDP_IOCTL_PRIV
if (SDPK_EDpri[key_arr_idx].len > 0) {
copy_kek(&req.key, &SDPK_EDpub[key_arr_idx], KEK_TYPE_ECDH256_PRIV);
DEK_LOGD("SDPK_EDpri len : %d\n", req.key.len);
} else {
DEK_LOGE("SDPK_EDpri not-available\n");
ret = -EIO;
goto err;
}
#else
DEK_LOGE("SDPK_EDpri not exposed\n");
ret = -EOPNOTSUPP;
goto err;
#endif
break;
default:
DEK_LOGE("invalid key type\n");
ret = -EINVAL;
goto err;
break;
}
if(copy_to_user(ubuf, &req, sizeof(req))) {
DEK_LOGE("can't copy to user kek\n");
zero_out((char *)&req, sizeof(dek_arg_get_kek));
ret = -EFAULT;
goto err;
}
zero_out((char *)&req, sizeof(dek_arg_get_kek));
break;
}
default:
DEK_LOGE("%s case default\n", __func__);
ret = -EINVAL;
break;
}
return ret;
err:
return ret;
}
static int dek_decrypt_dek(int userid, dek_t *encDek, dek_t *plainDek) {
int key_arr_idx = PERSONA_KEY_ARR_IDX(userid);
if (!dek_is_persona(userid)) {
DEK_LOGE("%s invalid userid %d\n", __func__, userid);
return -EFAULT;
}
#if DEK_DEBUG
DEK_LOGD("encDek from user: "******"aes decrypt failed\n");
dek_add_to_log(userid, "aes decrypt failed");
plainDek->len = 0;
} else {
plainDek->len = encDek->len;
plainDek->type = DEK_TYPE_PLAIN;
}
} else {
DEK_LOGE("no SDPK_sym key for id: %d\n", userid);
dek_add_to_log(userid, "decrypt failed, persona locked");
return -EIO;
}
} else if (encDek->type == DEK_TYPE_RSA_ENC) {
DEK_LOGE("Not supported key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, RSA type not supported");
return -EFAULT;
} else if (encDek->type == DEK_TYPE_DH_ENC) {
#ifdef CONFIG_PUB_CRYPTO
if(SDPK_Dpri[key_arr_idx].len > 0) {
if(dh_decryptEDEK(encDek, plainDek, &SDPK_Dpri[key_arr_idx])){
DEK_LOGE("dh_decryptEDEK failed");
return -1;
}
}else{
DEK_LOGE("SDPK_Dpri for id: %d\n", userid);
dek_add_to_log(userid, "encrypt failed, no SDPK_Dpri");
return -EIO;
}
#else
DEK_LOGE("Not supported key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, DH type not supported");
return -EOPNOTSUPP;
#endif
} else {
DEK_LOGE("Unsupported decrypt key type: %d\n", encDek->type);
dek_add_to_log(userid, "decrypt failed, unsupported key type");
return -EFAULT;
}
if (plainDek->len <= 0 || plainDek->len > DEK_LEN) {
DEK_LOGE("dek_decrypt_dek, incorrect len=%d\n", plainDek->len);
zero_out((char *)plainDek, sizeof(dek_t));
return -EFAULT;
} else {
#if DEK_DEBUG
DEK_LOGD("plainDek to user: ");
dump(plainDek->buf, plainDek->len);
#endif
}
return 0;
}