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processing_symm.c
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processing_symm.c
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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2017-2020, Linaro Limited
*/
#include <assert.h>
#include <pkcs11_ta.h>
#include <string.h>
#include <tee_api_defines.h>
#include <tee_internal_api.h>
#include <tee_internal_api_extensions.h>
#include <utee_defines.h>
#include <util.h>
#include "attributes.h"
#include "object.h"
#include "pkcs11_attributes.h"
#include "pkcs11_helpers.h"
#include "pkcs11_token.h"
#include "processing.h"
#include "serializer.h"
struct input_data_ref {
size_t size;
void *data;
};
bool processing_is_tee_symm(enum pkcs11_mechanism_id proc_id)
{
switch (proc_id) {
/* Authentication */
case PKCS11_CKM_AES_CMAC:
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
case PKCS11_CKM_AES_CMAC_GENERAL:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
/* Ciphering */
case PKCS11_CKM_AES_ECB:
case PKCS11_CKM_AES_CBC:
case PKCS11_CKM_AES_CTS:
case PKCS11_CKM_AES_CTR:
case PKCS11_CKM_AES_ECB_ENCRYPT_DATA:
case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
return true;
default:
return false;
}
}
static enum pkcs11_rc
pkcs2tee_algorithm(uint32_t *tee_id, struct pkcs11_attribute_head *proc_params)
{
static const struct {
enum pkcs11_mechanism_id mech_id;
uint32_t tee_id;
} pkcs2tee_algo[] = {
/* AES flavors */
{ PKCS11_CKM_AES_ECB, TEE_ALG_AES_ECB_NOPAD },
{ PKCS11_CKM_AES_CBC, TEE_ALG_AES_CBC_NOPAD },
{ PKCS11_CKM_AES_ECB_ENCRYPT_DATA, TEE_ALG_AES_ECB_NOPAD },
{ PKCS11_CKM_AES_CBC_ENCRYPT_DATA, TEE_ALG_AES_CBC_NOPAD },
{ PKCS11_CKM_AES_CTR, TEE_ALG_AES_CTR },
{ PKCS11_CKM_AES_CTS, TEE_ALG_AES_CTS },
{ PKCS11_CKM_AES_CMAC, TEE_ALG_AES_CMAC },
{ PKCS11_CKM_AES_CMAC_GENERAL, TEE_ALG_AES_CMAC },
/* HMAC flavors */
{ PKCS11_CKM_MD5_HMAC, TEE_ALG_HMAC_MD5 },
{ PKCS11_CKM_SHA_1_HMAC, TEE_ALG_HMAC_SHA1 },
{ PKCS11_CKM_SHA224_HMAC, TEE_ALG_HMAC_SHA224 },
{ PKCS11_CKM_SHA256_HMAC, TEE_ALG_HMAC_SHA256 },
{ PKCS11_CKM_SHA384_HMAC, TEE_ALG_HMAC_SHA384 },
{ PKCS11_CKM_SHA512_HMAC, TEE_ALG_HMAC_SHA512 },
{ PKCS11_CKM_MD5_HMAC_GENERAL, TEE_ALG_HMAC_MD5 },
{ PKCS11_CKM_SHA_1_HMAC_GENERAL, TEE_ALG_HMAC_SHA1 },
{ PKCS11_CKM_SHA224_HMAC_GENERAL, TEE_ALG_HMAC_SHA224 },
{ PKCS11_CKM_SHA256_HMAC_GENERAL, TEE_ALG_HMAC_SHA256 },
{ PKCS11_CKM_SHA384_HMAC_GENERAL, TEE_ALG_HMAC_SHA384 },
{ PKCS11_CKM_SHA512_HMAC_GENERAL, TEE_ALG_HMAC_SHA512 },
};
size_t n = 0;
for (n = 0; n < ARRAY_SIZE(pkcs2tee_algo); n++) {
if (proc_params->id == pkcs2tee_algo[n].mech_id) {
*tee_id = pkcs2tee_algo[n].tee_id;
return PKCS11_CKR_OK;
}
}
return PKCS11_RV_NOT_IMPLEMENTED;
}
static enum pkcs11_rc pkcs2tee_key_type(uint32_t *tee_type,
struct pkcs11_object *obj)
{
static const struct {
enum pkcs11_key_type key_type;
uint32_t tee_id;
} pkcs2tee_key_type[] = {
{ PKCS11_CKK_AES, TEE_TYPE_AES },
{ PKCS11_CKK_GENERIC_SECRET, TEE_TYPE_GENERIC_SECRET },
{ PKCS11_CKK_MD5_HMAC, TEE_TYPE_HMAC_MD5 },
{ PKCS11_CKK_SHA_1_HMAC, TEE_TYPE_HMAC_SHA1 },
{ PKCS11_CKK_SHA224_HMAC, TEE_TYPE_HMAC_SHA224 },
{ PKCS11_CKK_SHA256_HMAC, TEE_TYPE_HMAC_SHA256 },
{ PKCS11_CKK_SHA384_HMAC, TEE_TYPE_HMAC_SHA384 },
{ PKCS11_CKK_SHA512_HMAC, TEE_TYPE_HMAC_SHA512 },
};
size_t n = 0;
enum pkcs11_key_type key_type = get_key_type(obj->attributes);
assert(get_class(obj->attributes) == PKCS11_CKO_SECRET_KEY);
for (n = 0; n < ARRAY_SIZE(pkcs2tee_key_type); n++) {
if (pkcs2tee_key_type[n].key_type == key_type) {
*tee_type = pkcs2tee_key_type[n].tee_id;
return PKCS11_CKR_OK;
}
}
return PKCS11_RV_NOT_FOUND;
}
static enum pkcs11_rc pkcsmech2tee_key_type(uint32_t *tee_type,
enum pkcs11_mechanism_id mech_id)
{
static const struct {
enum pkcs11_mechanism_id mech;
uint32_t tee_id;
} pkcs2tee_key_type[] = {
{ PKCS11_CKM_MD5_HMAC, TEE_TYPE_HMAC_MD5 },
{ PKCS11_CKM_SHA_1_HMAC, TEE_TYPE_HMAC_SHA1 },
{ PKCS11_CKM_SHA224_HMAC, TEE_TYPE_HMAC_SHA224 },
{ PKCS11_CKM_SHA256_HMAC, TEE_TYPE_HMAC_SHA256 },
{ PKCS11_CKM_SHA384_HMAC, TEE_TYPE_HMAC_SHA384 },
{ PKCS11_CKM_SHA512_HMAC, TEE_TYPE_HMAC_SHA512 },
{ PKCS11_CKM_MD5_HMAC_GENERAL, TEE_TYPE_HMAC_MD5 },
{ PKCS11_CKM_SHA_1_HMAC_GENERAL, TEE_TYPE_HMAC_SHA1 },
{ PKCS11_CKM_SHA224_HMAC_GENERAL, TEE_TYPE_HMAC_SHA224 },
{ PKCS11_CKM_SHA256_HMAC_GENERAL, TEE_TYPE_HMAC_SHA256 },
{ PKCS11_CKM_SHA384_HMAC_GENERAL, TEE_TYPE_HMAC_SHA384 },
{ PKCS11_CKM_SHA512_HMAC_GENERAL, TEE_TYPE_HMAC_SHA512 },
};
size_t n = 0;
for (n = 0; n < ARRAY_SIZE(pkcs2tee_key_type); n++) {
if (pkcs2tee_key_type[n].mech == mech_id) {
*tee_type = pkcs2tee_key_type[n].tee_id;
return PKCS11_CKR_OK;
}
}
return PKCS11_RV_NOT_FOUND;
}
static enum pkcs11_rc hmac_to_tee_hash(uint32_t *algo,
enum pkcs11_mechanism_id mech_id)
{
static const struct {
enum pkcs11_mechanism_id mech;
uint32_t tee_id;
} hmac_hash[] = {
{ PKCS11_CKM_MD5_HMAC, TEE_ALG_MD5 },
{ PKCS11_CKM_SHA_1_HMAC, TEE_ALG_SHA1 },
{ PKCS11_CKM_SHA224_HMAC, TEE_ALG_SHA224 },
{ PKCS11_CKM_SHA256_HMAC, TEE_ALG_SHA256 },
{ PKCS11_CKM_SHA384_HMAC, TEE_ALG_SHA384 },
{ PKCS11_CKM_SHA512_HMAC, TEE_ALG_SHA512 },
{ PKCS11_CKM_MD5_HMAC_GENERAL, TEE_ALG_MD5 },
{ PKCS11_CKM_SHA_1_HMAC_GENERAL, TEE_ALG_SHA1 },
{ PKCS11_CKM_SHA224_HMAC_GENERAL, TEE_ALG_SHA224 },
{ PKCS11_CKM_SHA256_HMAC_GENERAL, TEE_ALG_SHA256 },
{ PKCS11_CKM_SHA384_HMAC_GENERAL, TEE_ALG_SHA384 },
{ PKCS11_CKM_SHA512_HMAC_GENERAL, TEE_ALG_SHA512 },
};
size_t n = 0;
for (n = 0; n < ARRAY_SIZE(hmac_hash); n++) {
if (hmac_hash[n].mech == mech_id) {
*algo = hmac_hash[n].tee_id;
return PKCS11_CKR_OK;
}
}
return PKCS11_RV_NOT_FOUND;
}
static enum pkcs11_rc
allocate_tee_operation(struct pkcs11_session *session,
enum processing_func function,
struct pkcs11_attribute_head *params,
struct pkcs11_object *obj)
{
uint32_t size = (uint32_t)get_object_key_bit_size(obj);
uint32_t key_size = size / 8;
uint32_t algo = 0;
uint32_t mode = 0;
uint32_t max_key_size = 0;
uint32_t min_key_size = 0;
TEE_Result res = TEE_ERROR_GENERIC;
assert(session->processing->tee_op_handle == TEE_HANDLE_NULL);
if (pkcs2tee_algorithm(&algo, params))
return PKCS11_CKR_FUNCTION_FAILED;
/* Sign/Verify with AES or generic key relate to TEE MAC operation */
switch (params->id) {
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
mechanism_supported_key_sizes_bytes(params->id, &min_key_size,
&max_key_size);
if (key_size < min_key_size)
return PKCS11_CKR_KEY_SIZE_RANGE;
/*
* If size of generic key is greater than the size
* supported by TEE API, this is not considered an
* error. When loading TEE key, we will hash the key
* to generate the appropriate key for HMAC operation.
* This key size will not be greater than the
* max_key_size. So we can use max_key_size for
* TEE_AllocateOperation().
*/
if (key_size > max_key_size)
size = max_key_size * 8;
mode = TEE_MODE_MAC;
break;
case PKCS11_CKM_AES_CMAC:
case PKCS11_CKM_AES_CMAC_GENERAL:
mode = TEE_MODE_MAC;
break;
default:
pkcs2tee_mode(&mode, function);
break;
}
res = TEE_AllocateOperation(&session->processing->tee_op_handle,
algo, mode, size);
if (res)
EMSG("TEE_AllocateOp. failed %#"PRIx32" %#"PRIx32" %#"PRIx32,
algo, mode, size);
if (res == TEE_ERROR_NOT_SUPPORTED)
return PKCS11_CKR_MECHANISM_INVALID;
return tee2pkcs_error(res);
}
static enum pkcs11_rc hash_secret_helper(enum pkcs11_mechanism_id mech_id,
struct pkcs11_object *obj,
TEE_Attribute *tee_attr,
void **ctx,
size_t *object_size_bits)
{
uint32_t algo = 0;
void *hash_ptr = NULL;
uint32_t hash_size = 0;
enum pkcs11_rc rc = PKCS11_CKR_OK;
rc = hmac_to_tee_hash(&algo, mech_id);
if (rc)
return rc;
hash_size = TEE_ALG_GET_DIGEST_SIZE(algo);
hash_ptr = TEE_Malloc(hash_size, 0);
if (!hash_ptr)
return PKCS11_CKR_DEVICE_MEMORY;
rc = pkcs2tee_load_hashed_attr(tee_attr, TEE_ATTR_SECRET_VALUE, obj,
PKCS11_CKA_VALUE, algo, hash_ptr,
&hash_size);
if (rc) {
EMSG("No secret/hash error");
TEE_Free(hash_ptr);
return rc;
}
*ctx = hash_ptr;
*object_size_bits = hash_size * 8;
return PKCS11_CKR_OK;
}
static enum pkcs11_rc load_tee_key(struct pkcs11_session *session,
struct pkcs11_object *obj,
struct pkcs11_attribute_head *proc_params)
{
TEE_Attribute tee_attr = { };
size_t object_size = 0;
uint32_t tee_key_type = 0;
enum pkcs11_key_type key_type = 0;
enum pkcs11_rc rc = PKCS11_CKR_OK;
TEE_Result res = TEE_ERROR_GENERIC;
uint32_t max_key_size = 0;
uint32_t min_key_size = 0;
if (obj->key_handle != TEE_HANDLE_NULL) {
/* Key was already loaded and fits current need */
goto key_ready;
}
object_size = get_object_key_bit_size(obj);
if (!object_size)
return PKCS11_CKR_GENERAL_ERROR;
switch (proc_params->id) {
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
key_type = get_key_type(obj->attributes);
/*
* If Object Key type is PKCS11_CKK_GENERIC_SECRET,
* determine the tee_key_type using the
* mechanism instead of object key_type.
*/
if (key_type == PKCS11_CKK_GENERIC_SECRET)
rc = pkcsmech2tee_key_type(&tee_key_type,
proc_params->id);
else
rc = pkcs2tee_key_type(&tee_key_type, obj);
if (rc)
return rc;
mechanism_supported_key_sizes_bytes(proc_params->id,
&min_key_size,
&max_key_size);
if ((object_size / 8) > max_key_size) {
rc = hash_secret_helper(proc_params->id, obj, &tee_attr,
&session->processing->extra_ctx,
&object_size);
if (rc)
return rc;
} else {
if (!pkcs2tee_load_attr(&tee_attr,
TEE_ATTR_SECRET_VALUE,
obj,
PKCS11_CKA_VALUE)) {
EMSG("No secret found");
return PKCS11_CKR_FUNCTION_FAILED;
}
}
break;
default:
rc = pkcs2tee_key_type(&tee_key_type, obj);
if (rc)
return rc;
if (!pkcs2tee_load_attr(&tee_attr, TEE_ATTR_SECRET_VALUE,
obj, PKCS11_CKA_VALUE)) {
EMSG("No secret found");
return PKCS11_CKR_FUNCTION_FAILED;
}
break;
}
res = TEE_AllocateTransientObject(tee_key_type, object_size,
&obj->key_handle);
if (res) {
DMSG("TEE_AllocateTransientObject failed, %#"PRIx32, res);
return tee2pkcs_error(res);
}
res = TEE_PopulateTransientObject(obj->key_handle, &tee_attr, 1);
if (res) {
DMSG("TEE_PopulateTransientObject failed, %#"PRIx32, res);
goto error;
}
key_ready:
res = TEE_SetOperationKey(session->processing->tee_op_handle,
obj->key_handle);
if (res) {
DMSG("TEE_SetOperationKey failed, %#"PRIx32, res);
goto error;
}
return PKCS11_CKR_OK;
error:
TEE_FreeTransientObject(obj->key_handle);
obj->key_handle = TEE_HANDLE_NULL;
return tee2pkcs_error(res);
}
static enum pkcs11_rc
tee_init_derive_symm(struct active_processing *processing,
struct pkcs11_attribute_head *proc_params)
{
struct serialargs args = { };
enum pkcs11_rc rc = PKCS11_CKR_OK;
struct input_data_ref *param = NULL;
void *iv = NULL;
if (!proc_params)
return PKCS11_CKR_ARGUMENTS_BAD;
param = TEE_Malloc(sizeof(struct input_data_ref), TEE_MALLOC_FILL_ZERO);
if (!param)
return PKCS11_CKR_DEVICE_MEMORY;
serialargs_init(&args, proc_params->data, proc_params->size);
switch (proc_params->id) {
case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
rc = serialargs_get_ptr(&args, &iv, 16);
if (rc)
goto err;
break;
default:
break;
}
rc = serialargs_get(&args, ¶m->size, sizeof(uint32_t));
if (rc)
goto err;
rc = serialargs_get_ptr(&args, ¶m->data, param->size);
if (rc)
goto err;
if (serialargs_remaining_bytes(&args)) {
rc = PKCS11_CKR_ARGUMENTS_BAD;
goto err;
}
processing->extra_ctx = param;
switch (proc_params->id) {
case PKCS11_CKM_AES_ECB_ENCRYPT_DATA:
if (param->size % TEE_AES_BLOCK_SIZE) {
rc = PKCS11_CKR_DATA_LEN_RANGE;
goto err;
}
TEE_CipherInit(processing->tee_op_handle, NULL, 0);
break;
case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
if (param->size % TEE_AES_BLOCK_SIZE) {
rc = PKCS11_CKR_DATA_LEN_RANGE;
goto err;
}
TEE_CipherInit(processing->tee_op_handle, iv, 16);
break;
default:
TEE_Panic(proc_params->id);
break;
}
return PKCS11_CKR_OK;
err:
processing->extra_ctx = NULL;
TEE_Free(param);
return rc;
}
static enum pkcs11_rc
input_hmac_len_is_valid(struct pkcs11_attribute_head *proc_params,
uint32_t hmac_len)
{
uint32_t sign_sz = 0;
switch (proc_params->id) {
case PKCS11_CKM_MD5_HMAC_GENERAL:
sign_sz = TEE_MD5_HASH_SIZE;
break;
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
sign_sz = TEE_SHA1_HASH_SIZE;
break;
case PKCS11_CKM_SHA224_HMAC_GENERAL:
sign_sz = TEE_SHA224_HASH_SIZE;
break;
case PKCS11_CKM_SHA256_HMAC_GENERAL:
sign_sz = TEE_SHA256_HASH_SIZE;
break;
case PKCS11_CKM_SHA384_HMAC_GENERAL:
sign_sz = TEE_SHA384_HASH_SIZE;
break;
case PKCS11_CKM_SHA512_HMAC_GENERAL:
sign_sz = TEE_SHA512_HASH_SIZE;
break;
case PKCS11_CKM_AES_CMAC_GENERAL:
sign_sz = TEE_AES_BLOCK_SIZE;
break;
default:
return PKCS11_CKR_MECHANISM_INVALID;
}
if (!hmac_len || hmac_len > sign_sz)
return PKCS11_CKR_SIGNATURE_LEN_RANGE;
return PKCS11_CKR_OK;
}
static enum pkcs11_rc
init_tee_operation(struct pkcs11_session *session,
struct pkcs11_attribute_head *proc_params)
{
enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
uint32_t *pkcs11_data = NULL;
switch (proc_params->id) {
case PKCS11_CKM_AES_CMAC:
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
if (proc_params->size)
return PKCS11_CKR_MECHANISM_PARAM_INVALID;
TEE_MACInit(session->processing->tee_op_handle, NULL, 0);
rc = PKCS11_CKR_OK;
break;
case PKCS11_CKM_AES_CMAC_GENERAL:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
if (proc_params->size != sizeof(uint32_t))
return PKCS11_CKR_MECHANISM_PARAM_INVALID;
pkcs11_data = TEE_Malloc(sizeof(uint32_t),
TEE_MALLOC_FILL_ZERO);
if (!pkcs11_data)
return PKCS11_CKR_DEVICE_MEMORY;
TEE_MemMove(pkcs11_data, proc_params->data, sizeof(uint32_t));
rc = input_hmac_len_is_valid(proc_params, *pkcs11_data);
if (rc) {
TEE_Free(pkcs11_data);
return rc;
}
session->processing->extra_ctx = (void *)pkcs11_data;
TEE_MACInit(session->processing->tee_op_handle, NULL, 0);
rc = PKCS11_CKR_OK;
break;
case PKCS11_CKM_AES_ECB:
if (proc_params->size)
return PKCS11_CKR_MECHANISM_PARAM_INVALID;
TEE_CipherInit(session->processing->tee_op_handle, NULL, 0);
rc = PKCS11_CKR_OK;
break;
case PKCS11_CKM_AES_CBC:
case PKCS11_CKM_AES_CTS:
if (proc_params->size != 16)
return PKCS11_CKR_MECHANISM_PARAM_INVALID;
TEE_CipherInit(session->processing->tee_op_handle,
proc_params->data, 16);
rc = PKCS11_CKR_OK;
break;
case PKCS11_CKM_AES_CTR:
rc = tee_init_ctr_operation(session->processing,
proc_params->data,
proc_params->size);
break;
case PKCS11_CKM_AES_ECB_ENCRYPT_DATA:
case PKCS11_CKM_AES_CBC_ENCRYPT_DATA:
rc = tee_init_derive_symm(session->processing, proc_params);
break;
default:
TEE_Panic(proc_params->id);
break;
}
return rc;
}
enum pkcs11_rc init_symm_operation(struct pkcs11_session *session,
enum processing_func function,
struct pkcs11_attribute_head *proc_params,
struct pkcs11_object *obj)
{
enum pkcs11_rc rc = PKCS11_CKR_OK;
assert(processing_is_tee_symm(proc_params->id));
rc = allocate_tee_operation(session, function, proc_params, obj);
if (rc)
return rc;
rc = load_tee_key(session, obj, proc_params);
if (rc)
return rc;
rc = init_tee_operation(session, proc_params);
if (!rc)
session->processing->mecha_type = proc_params->id;
return rc;
}
/* Validate input buffer size as per PKCS#11 constraints */
static enum pkcs11_rc input_data_size_is_valid(struct active_processing *proc,
enum processing_func function,
size_t in_size)
{
switch (proc->mecha_type) {
case PKCS11_CKM_AES_ECB:
case PKCS11_CKM_AES_CBC:
if (function == PKCS11_FUNCTION_ENCRYPT &&
in_size % TEE_AES_BLOCK_SIZE)
return PKCS11_CKR_DATA_LEN_RANGE;
if (function == PKCS11_FUNCTION_DECRYPT &&
in_size % TEE_AES_BLOCK_SIZE)
return PKCS11_CKR_ENCRYPTED_DATA_LEN_RANGE;
break;
case PKCS11_CKM_AES_CTS:
if (function == PKCS11_FUNCTION_ENCRYPT &&
in_size < TEE_AES_BLOCK_SIZE)
return PKCS11_CKR_DATA_LEN_RANGE;
if (function == PKCS11_FUNCTION_DECRYPT &&
in_size < TEE_AES_BLOCK_SIZE)
return PKCS11_CKR_ENCRYPTED_DATA_LEN_RANGE;
break;
default:
break;
}
return PKCS11_CKR_OK;
}
/* Validate input buffer size as per PKCS#11 constraints */
static enum pkcs11_rc input_sign_size_is_valid(struct active_processing *proc,
size_t in_size)
{
size_t sign_sz = 0;
switch (proc->mecha_type) {
case PKCS11_CKM_MD5_HMAC:
sign_sz = TEE_MD5_HASH_SIZE;
break;
case PKCS11_CKM_SHA_1_HMAC:
sign_sz = TEE_SHA1_HASH_SIZE;
break;
case PKCS11_CKM_SHA224_HMAC:
sign_sz = TEE_SHA224_HASH_SIZE;
break;
case PKCS11_CKM_SHA256_HMAC:
sign_sz = TEE_SHA256_HASH_SIZE;
break;
case PKCS11_CKM_SHA384_HMAC:
sign_sz = TEE_SHA384_HASH_SIZE;
break;
case PKCS11_CKM_SHA512_HMAC:
sign_sz = TEE_SHA512_HASH_SIZE;
break;
case PKCS11_CKM_AES_CMAC:
sign_sz = TEE_AES_BLOCK_SIZE;
break;
default:
return PKCS11_CKR_GENERAL_ERROR;
}
if (in_size != sign_sz)
return PKCS11_CKR_SIGNATURE_LEN_RANGE;
return PKCS11_CKR_OK;
}
/*
* step_sym_cipher - processing symmetric (and related) cipher operation step
*
* @session - current session
* @function - processing function (encrypt, decrypt, sign, ...)
* @step - step ID in the processing (oneshot, update, final)
* @ptype - invocation parameter types
* @params - invocation parameter references
*/
enum pkcs11_rc step_symm_operation(struct pkcs11_session *session,
enum processing_func function,
enum processing_step step,
uint32_t ptypes, TEE_Param *params)
{
enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
TEE_Result res = TEE_ERROR_GENERIC;
void *in_buf = NULL;
size_t in_size = 0;
void *out_buf = NULL;
size_t out_size = 0;
void *in2_buf = NULL;
uint32_t in2_size = 0;
bool output_data = false;
struct active_processing *proc = session->processing;
uint32_t hmac_len = 0;
uint8_t computed_mac[TEE_MAX_HASH_SIZE] = { 0 };
size_t computed_mac_size = TEE_MAX_HASH_SIZE;
if (TEE_PARAM_TYPE_GET(ptypes, 1) == TEE_PARAM_TYPE_MEMREF_INPUT) {
in_buf = params[1].memref.buffer;
in_size = params[1].memref.size;
if (in_size && !in_buf)
return PKCS11_CKR_ARGUMENTS_BAD;
}
if (TEE_PARAM_TYPE_GET(ptypes, 2) == TEE_PARAM_TYPE_MEMREF_INPUT) {
in2_buf = params[2].memref.buffer;
in2_size = params[2].memref.size;
if (in2_size && !in2_buf)
return PKCS11_CKR_ARGUMENTS_BAD;
}
if (TEE_PARAM_TYPE_GET(ptypes, 2) == TEE_PARAM_TYPE_MEMREF_OUTPUT) {
out_buf = params[2].memref.buffer;
out_size = params[2].memref.size;
if (out_size && !out_buf)
return PKCS11_CKR_ARGUMENTS_BAD;
}
if (TEE_PARAM_TYPE_GET(ptypes, 3) != TEE_PARAM_TYPE_NONE)
return PKCS11_CKR_ARGUMENTS_BAD;
switch (step) {
case PKCS11_FUNC_STEP_ONESHOT:
case PKCS11_FUNC_STEP_UPDATE:
case PKCS11_FUNC_STEP_FINAL:
break;
default:
return PKCS11_CKR_GENERAL_ERROR;
}
if (step != PKCS11_FUNC_STEP_FINAL) {
rc = input_data_size_is_valid(proc, function, in_size);
if (rc)
return rc;
}
/*
* Feed active operation with data
*/
switch (proc->mecha_type) {
case PKCS11_CKM_AES_CMAC:
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
case PKCS11_CKM_AES_CMAC_GENERAL:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
if (step == PKCS11_FUNC_STEP_FINAL ||
step == PKCS11_FUNC_STEP_ONESHOT)
break;
if (!in_buf) {
DMSG("No input data");
return PKCS11_CKR_ARGUMENTS_BAD;
}
switch (function) {
case PKCS11_FUNCTION_SIGN:
case PKCS11_FUNCTION_VERIFY:
TEE_MACUpdate(proc->tee_op_handle, in_buf, in_size);
rc = PKCS11_CKR_OK;
break;
default:
TEE_Panic(function);
break;
}
break;
case PKCS11_CKM_AES_ECB:
case PKCS11_CKM_AES_CBC:
case PKCS11_CKM_AES_CTS:
case PKCS11_CKM_AES_CTR:
if (step == PKCS11_FUNC_STEP_FINAL ||
step == PKCS11_FUNC_STEP_ONESHOT)
break;
if (!in_buf) {
EMSG("No input data");
return PKCS11_CKR_ARGUMENTS_BAD;
}
switch (function) {
case PKCS11_FUNCTION_ENCRYPT:
case PKCS11_FUNCTION_DECRYPT:
res = TEE_CipherUpdate(proc->tee_op_handle,
in_buf, in_size,
out_buf, &out_size);
output_data = true;
rc = tee2pkcs_error(res);
break;
default:
TEE_Panic(function);
break;
}
break;
default:
TEE_Panic(proc->mecha_type);
break;
}
if (step == PKCS11_FUNC_STEP_UPDATE)
goto out;
/*
* Finalize (PKCS11_FUNC_STEP_ONESHOT/_FINAL) operation
*/
switch (session->processing->mecha_type) {
case PKCS11_CKM_AES_CMAC:
case PKCS11_CKM_MD5_HMAC:
case PKCS11_CKM_SHA_1_HMAC:
case PKCS11_CKM_SHA224_HMAC:
case PKCS11_CKM_SHA256_HMAC:
case PKCS11_CKM_SHA384_HMAC:
case PKCS11_CKM_SHA512_HMAC:
switch (function) {
case PKCS11_FUNCTION_SIGN:
res = TEE_MACComputeFinal(proc->tee_op_handle,
in_buf, in_size, out_buf,
&out_size);
output_data = true;
rc = tee2pkcs_error(res);
break;
case PKCS11_FUNCTION_VERIFY:
rc = input_sign_size_is_valid(proc, in2_size);
if (rc)
return rc;
res = TEE_MACCompareFinal(proc->tee_op_handle,
in_buf, in_size, in2_buf,
in2_size);
rc = tee2pkcs_error(res);
break;
default:
TEE_Panic(function);
break;
}
break;
case PKCS11_CKM_AES_CMAC_GENERAL:
case PKCS11_CKM_MD5_HMAC_GENERAL:
case PKCS11_CKM_SHA_1_HMAC_GENERAL:
case PKCS11_CKM_SHA224_HMAC_GENERAL:
case PKCS11_CKM_SHA256_HMAC_GENERAL:
case PKCS11_CKM_SHA384_HMAC_GENERAL:
case PKCS11_CKM_SHA512_HMAC_GENERAL:
assert(session->processing->extra_ctx);
hmac_len = *(uint32_t *)session->processing->extra_ctx;
switch (function) {
case PKCS11_FUNCTION_SIGN:
if (out_size < hmac_len) {
/* inform client of required size */
out_size = hmac_len;
output_data = true;
rc = PKCS11_CKR_BUFFER_TOO_SMALL;
goto out;
}
res = TEE_MACComputeFinal(proc->tee_op_handle,
in_buf, in_size,
computed_mac,
&computed_mac_size);
if (res == TEE_SUCCESS) {
/* truncate to hmac_len */
TEE_MemMove(out_buf, computed_mac, hmac_len);
output_data = true;
}
/* inform client of required size */
out_size = hmac_len;
rc = tee2pkcs_error(res);
break;
case PKCS11_FUNCTION_VERIFY:
/* must compute full MAC before comparing partial */
res = TEE_MACComputeFinal(proc->tee_op_handle, in_buf,
in_size, computed_mac,
&computed_mac_size);
if (!in2_size || in2_size > computed_mac_size) {
EMSG("Invalid signature size: %"PRIu32,
in2_size);
return PKCS11_CKR_SIGNATURE_LEN_RANGE;
}
if (res == TEE_SUCCESS) {
/*
* Only the first in2_size bytes of the
* signature to be verified is passed in from
* caller
*/
if (TEE_MemCompare(in2_buf, computed_mac,
in2_size)) {
res = TEE_ERROR_MAC_INVALID;
}
}
rc = tee2pkcs_error(res);
break;
default:
TEE_Panic(function);
break;
}
break;
case PKCS11_CKM_AES_ECB:
case PKCS11_CKM_AES_CBC:
case PKCS11_CKM_AES_CTS:
case PKCS11_CKM_AES_CTR:
if (step == PKCS11_FUNC_STEP_ONESHOT && !in_buf) {
EMSG("No input data");
return PKCS11_CKR_ARGUMENTS_BAD;
}
switch (function) {
case PKCS11_FUNCTION_ENCRYPT:
case PKCS11_FUNCTION_DECRYPT:
res = TEE_CipherDoFinal(proc->tee_op_handle,
in_buf, in_size,
out_buf, &out_size);
output_data = true;
rc = tee2pkcs_error(res);
break;
default:
TEE_Panic(function);
break;
}
break;
default:
TEE_Panic(proc->mecha_type);
break;
}
out:
if (output_data &&
(rc == PKCS11_CKR_OK || rc == PKCS11_CKR_BUFFER_TOO_SMALL)) {
switch (TEE_PARAM_TYPE_GET(ptypes, 2)) {
case TEE_PARAM_TYPE_MEMREF_OUTPUT:
case TEE_PARAM_TYPE_MEMREF_INOUT:
params[2].memref.size = out_size;
break;
default:
rc = PKCS11_CKR_ARGUMENTS_BAD;
break;
}
}
return rc;
}
enum pkcs11_rc derive_key_by_symm_enc(struct pkcs11_session *session,
void **out_buf, uint32_t *out_size)
{
enum pkcs11_rc rc = PKCS11_CKR_GENERAL_ERROR;
TEE_Result res = TEE_ERROR_GENERIC;
struct active_processing *proc = session->processing;
struct input_data_ref *input = proc->extra_ctx;
void *in_buf = NULL;
void *dest_buf = NULL;
uint32_t in_size = 0;
size_t tmp_sz = 0;
switch (proc->mecha_type) {