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