1 /* 2 * Copyright (c) 2022, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdint.h> 8 9 #include <plat/arm/common/plat_arm.h> 10 11 /* 12 * Return the non-volatile counter value stored in the platform. The cookie 13 * will contain the OID of the counter in the certificate. 14 * 15 * Return: 0 = success, Otherwise = error 16 */ 17 int plat_get_nv_ctr(void *cookie, unsigned int *nv_ctr) 18 { 19 *nv_ctr = N1SDP_FW_NVCTR_VAL; 20 return 0; 21 } 22 23 /* 24 * Store a new non-volatile counter value. By default on ARM development 25 * platforms, the non-volatile counters are RO and cannot be modified. We expect 26 * the values in the certificates to always match the RO values so that this 27 * function is never called. 28 * 29 * Return: 0 = success, Otherwise = error 30 */ 31 int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr) 32 { 33 return 1; 34 } 35 36 /* 37 * Return the ROTPK hash in the following ASN.1 structure in DER format: 38 * 39 * AlgorithmIdentifier ::= SEQUENCE { 40 * algorithm OBJECT IDENTIFIER, 41 * parameters ANY DEFINED BY algorithm OPTIONAL 42 * } 43 * 44 * DigestInfo ::= SEQUENCE { 45 * digestAlgorithm AlgorithmIdentifier, 46 * digest OCTET STRING 47 * } 48 */ 49 int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, 50 unsigned int *flags) 51 { 52 return arm_get_rotpk_info(cookie, key_ptr, key_len, flags); 53 } 54 55