110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
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/*
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* Copyright (c) 2017-2020 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 <plat/common/platform.h>
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#include <tools_share/tbbr_oid.h>
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#include <lib/libc/endian.h>
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#include <drivers/arm/cryptocell/713/bsv_api.h>
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#include <drivers/arm/cryptocell/713/bsv_error.h>
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/*
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* Return the ROTPK hash
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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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int i;
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uint32_t *key = (uint32_t *)dst;
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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 = CC_BsvLcsGet(PLAT_CRYPTOCELL_BASE, &lcs);
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if (error != CC_OK)
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return 1;
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if ((lcs == CC_BSV_CHIP_MANUFACTURE_LCS) || (lcs == CC_BSV_RMA_LCS)) {
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*flags = ROTPK_NOT_DEPLOYED;
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return 0;
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}
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error = CC_BsvPubKeyHashGet(PLAT_CRYPTOCELL_BASE,
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CC_SB_HASH_BOOT_KEY_256B,
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key, HASH_RESULT_SIZE_IN_WORDS);
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if (error == CC_BSV_HASH_NOT_PROGRAMMED_ERR) {
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*flags = ROTPK_NOT_DEPLOYED;
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return 0;
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}
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if (error == CC_OK) {
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/* Keys are stored in OTP in little-endian format */
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for (i = 0; i < HASH_RESULT_SIZE_IN_WORDS; i++)
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key[i] = le32toh(key[i]);
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*flags = ROTPK_IS_HASH;
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return 0;
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}
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return 1;
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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 = CC_BsvSwVersionGet(PLAT_CRYPTOCELL_BASE,
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CC_SW_VERSION_TRUSTED, nv_ctr);
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} else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
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error = CC_BsvSwVersionGet(PLAT_CRYPTOCELL_BASE,
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CC_SW_VERSION_NON_TRUSTED, 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 = CC_BsvSwVersionSet(PLAT_CRYPTOCELL_BASE,
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CC_SW_VERSION_TRUSTED, nv_ctr);
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} else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) {
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error = CC_BsvSwVersionSet(PLAT_CRYPTOCELL_BASE,
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CC_SW_VERSION_NON_TRUSTED, nv_ctr);
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}
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return (error != CC_OK);
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}
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