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/*
* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <stddef.h>
#include <string.h>
#include <platform_def.h>
#include <plat/common/platform.h>
#include <tools_share/tbbr_oid.h>
#include <common/debug.h>
#include <drivers/arm/cryptocell/712/sbrom_bsv_api.h>
#include <drivers/arm/cryptocell/712/nvm.h>
#include <drivers/arm/cryptocell/712/nvm_otp.h>
/*
* Return the ROTPK hash
*
* dst: buffer into which the ROTPK hash will be copied into
* len: length of the provided buffer, which must be at least enough for a
* SHA256 hash
* flags: a pointer to integer that will be set to indicate the ROTPK status
*
* Return: 0 = success, Otherwise = error
*/
int cc_get_rotpk_hash(unsigned char *dst, unsigned int len, unsigned int *flags)
{
CCError_t error;
uint32_t lcs;
assert(dst != NULL);
assert(len >= HASH_RESULT_SIZE_IN_WORDS);
assert(flags != NULL);
error = NVM_GetLCS(PLAT_CRYPTOCELL_BASE, &lcs);
if (error != CC_OK)
return 1;
/* If the lifecycle state is `SD`, return failure */
if (lcs == CC_BSV_SECURITY_DISABLED_LCS)
return 1;
/*
* If the lifecycle state is `CM` or `DM`, ROTPK shouldn't be verified.
* Return success after setting ROTPK_NOT_DEPLOYED flag
*/
if ((lcs == CC_BSV_CHIP_MANUFACTURE_LCS) ||
(lcs == CC_BSV_DEVICE_MANUFACTURE_LCS)) {
*flags = ROTPK_NOT_DEPLOYED;
return 0;
}
/* Copy the DER header */
error = NVM_ReadHASHPubKey(PLAT_CRYPTOCELL_BASE,
CC_SB_HASH_BOOT_KEY_256B,
(uint32_t *)dst, HASH_RESULT_SIZE_IN_WORDS);
if (error != CC_OK)
return 1;
*flags = ROTPK_IS_HASH;
return 0;
}
/*
* Return the non-volatile counter value stored in the platform. The cookie
* specifies the OID of the counter in the certificate.
*
* Return: 0 = success, Otherwise = error
*/
int plat_get_nv_ctr(void *cookie, unsigned int *nv_ctr)
{
CCError_t error = CC_FAIL;
if (strcmp(cookie, TRUSTED_FW_NVCOUNTER_OID) == 0) {
error = NVM_GetSwVersion(PLAT_CRYPTOCELL_BASE,
CC_SW_VERSION_COUNTER1, nv_ctr);
} else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
error = NVM_GetSwVersion(PLAT_CRYPTOCELL_BASE,
CC_SW_VERSION_COUNTER2, nv_ctr);
}
return (error != CC_OK);
}
/*
* Store a new non-volatile counter value in the counter specified by the OID
* in the cookie. This function is not expected to be called if the Lifecycle
* state is RMA as the values in the certificate are expected to always match
* the nvcounter values. But if called when the LCS is RMA, the underlying
* helper functions will return success but without updating the counter.
*
* Return: 0 = success, Otherwise = error
*/
int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr)
{
CCError_t error = CC_FAIL;
if (strcmp(cookie, TRUSTED_FW_NVCOUNTER_OID) == 0) {
error = NVM_SetSwVersion(PLAT_CRYPTOCELL_BASE,
CC_SW_VERSION_COUNTER1, nv_ctr);
} else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
error = NVM_SetSwVersion(PLAT_CRYPTOCELL_BASE,
CC_SW_VERSION_COUNTER2, nv_ctr);
}
return (error != CC_OK);
}
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