diff options
Diffstat (limited to 'drivers/auth/cryptocell/713/cryptocell_plat_helpers.c')
-rw-r--r-- | drivers/auth/cryptocell/713/cryptocell_plat_helpers.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/auth/cryptocell/713/cryptocell_plat_helpers.c b/drivers/auth/cryptocell/713/cryptocell_plat_helpers.c new file mode 100644 index 0000000..17e1280 --- /dev/null +++ b/drivers/auth/cryptocell/713/cryptocell_plat_helpers.c @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2017-2020 ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <assert.h> +#include <stddef.h> +#include <string.h> + +#include <plat/common/platform.h> +#include <tools_share/tbbr_oid.h> + +#include <lib/libc/endian.h> +#include <drivers/arm/cryptocell/713/bsv_api.h> +#include <drivers/arm/cryptocell/713/bsv_error.h> + +/* + * Return the ROTPK hash + * + * 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; + int i; + uint32_t *key = (uint32_t *)dst; + + assert(dst != NULL); + assert(len >= HASH_RESULT_SIZE_IN_WORDS); + assert(flags != NULL); + + error = CC_BsvLcsGet(PLAT_CRYPTOCELL_BASE, &lcs); + if (error != CC_OK) + return 1; + + if ((lcs == CC_BSV_CHIP_MANUFACTURE_LCS) || (lcs == CC_BSV_RMA_LCS)) { + *flags = ROTPK_NOT_DEPLOYED; + return 0; + } + + error = CC_BsvPubKeyHashGet(PLAT_CRYPTOCELL_BASE, + CC_SB_HASH_BOOT_KEY_256B, + key, HASH_RESULT_SIZE_IN_WORDS); + + if (error == CC_BSV_HASH_NOT_PROGRAMMED_ERR) { + *flags = ROTPK_NOT_DEPLOYED; + return 0; + } + + if (error == CC_OK) { + + /* Keys are stored in OTP in little-endian format */ + for (i = 0; i < HASH_RESULT_SIZE_IN_WORDS; i++) + key[i] = le32toh(key[i]); + + *flags = ROTPK_IS_HASH; + return 0; + } + + return 1; +} + +/* + * 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 = CC_BsvSwVersionGet(PLAT_CRYPTOCELL_BASE, + CC_SW_VERSION_TRUSTED, nv_ctr); + } else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { + error = CC_BsvSwVersionGet(PLAT_CRYPTOCELL_BASE, + CC_SW_VERSION_NON_TRUSTED, 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 = CC_BsvSwVersionSet(PLAT_CRYPTOCELL_BASE, + CC_SW_VERSION_TRUSTED, nv_ctr); + } else if (strcmp(cookie, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { + error = CC_BsvSwVersionSet(PLAT_CRYPTOCELL_BASE, + CC_SW_VERSION_NON_TRUSTED, nv_ctr); + } + + return (error != CC_OK); +} + |