| /* |
| * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <assert.h> |
| #include <stdint.h> |
| #include <string.h> |
| |
| #include <lib/cassert.h> |
| #include <plat/common/platform.h> |
| #include <tools_share/tbbr_oid.h> |
| #include <platform_def.h> |
| |
| /* SHA256 algorithm */ |
| #define SHA256_BYTES 32 |
| |
| /* ROTPK locations */ |
| #define ARM_ROTPK_REGS_ID 1 |
| #define ARM_ROTPK_DEVEL_RSA_ID 2 |
| #define ARM_ROTPK_DEVEL_ECDSA_ID 3 |
| |
| static const unsigned char rotpk_hash_hdr[] = \ |
| "\x30\x31\x30\x0D\x06\x09\x60\x86\x48" \ |
| "\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20"; |
| static const unsigned int rotpk_hash_hdr_len = sizeof(rotpk_hash_hdr) - 1; |
| static unsigned char rotpk_hash_der[sizeof(rotpk_hash_hdr) - 1 + SHA256_BYTES]; |
| |
| /* Use the cryptocell variants if Cryptocell is present */ |
| #if !ARM_CRYPTOCELL_INTEG |
| #if !ARM_ROTPK_LOCATION_ID |
| #error "ARM_ROTPK_LOCATION_ID not defined" |
| #endif |
| |
| /* Weak definition may be overridden in specific platform */ |
| #pragma weak plat_get_nv_ctr |
| #pragma weak plat_set_nv_ctr |
| |
| #if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) |
| static const unsigned char arm_devel_rotpk_hash[] = \ |
| "\xB0\xF3\x82\x09\x12\x97\xD8\x3A" \ |
| "\x37\x7A\x72\x47\x1B\xEC\x32\x73" \ |
| "\xE9\x92\x32\xE2\x49\x59\xF6\x5E" \ |
| "\x8B\x4A\x4A\x46\xD8\x22\x9A\xDA"; |
| #elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) |
| static const unsigned char arm_devel_rotpk_hash[] = \ |
| "\x2E\x40\xBF\x6E\xF9\x12\xBB\x98" \ |
| "\x31\x71\x09\x0E\x1E\x15\x3D\x0B" \ |
| "\xFD\xD1\xCC\x69\x4A\x98\xEB\x8B" \ |
| "\xA0\xB0\x20\x86\x4E\x6C\x07\x17"; |
| #endif |
| |
| /* |
| * Return the ROTPK hash in the following ASN.1 structure in DER format: |
| * |
| * AlgorithmIdentifier ::= SEQUENCE { |
| * algorithm OBJECT IDENTIFIER, |
| * parameters ANY DEFINED BY algorithm OPTIONAL |
| * } |
| * |
| * DigestInfo ::= SEQUENCE { |
| * digestAlgorithm AlgorithmIdentifier, |
| * digest OCTET STRING |
| * } |
| */ |
| int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, |
| unsigned int *flags) |
| { |
| uint8_t *dst; |
| |
| assert(key_ptr != NULL); |
| assert(key_len != NULL); |
| assert(flags != NULL); |
| |
| /* Copy the DER header */ |
| memcpy(rotpk_hash_der, rotpk_hash_hdr, rotpk_hash_hdr_len); |
| dst = (uint8_t *)&rotpk_hash_der[rotpk_hash_hdr_len]; |
| |
| #if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \ |
| || (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) |
| memcpy(dst, arm_devel_rotpk_hash, SHA256_BYTES); |
| #elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_REGS_ID) |
| uint32_t *src, tmp; |
| unsigned int words, i; |
| |
| /* |
| * Append the hash from Trusted Root-Key Storage registers. The hash has |
| * not been written linearly into the registers, so we have to do a bit |
| * of byte swapping: |
| * |
| * 0x00 0x04 0x08 0x0C 0x10 0x14 0x18 0x1C |
| * +---------------------------------------------------------------+ |
| * | Reg0 | Reg1 | Reg2 | Reg3 | Reg4 | Reg5 | Reg6 | Reg7 | |
| * +---------------------------------------------------------------+ |
| * | ... ... | | ... ... | |
| * | +--------------------+ | +-------+ |
| * | | | | |
| * +----------------------------+ +----------------------------+ |
| * | | | | |
| * +-------+ | +--------------------+ | |
| * | | | | |
| * v v v v |
| * +---------------------------------------------------------------+ |
| * | | | |
| * +---------------------------------------------------------------+ |
| * 0 15 16 31 |
| * |
| * Additionally, we have to access the registers in 32-bit words |
| */ |
| words = SHA256_BYTES >> 3; |
| |
| /* Swap bytes 0-15 (first four registers) */ |
| src = (uint32_t *)TZ_PUB_KEY_HASH_BASE; |
| for (i = 0 ; i < words ; i++) { |
| tmp = src[words - 1 - i]; |
| /* Words are read in little endian */ |
| *dst++ = (uint8_t)((tmp >> 24) & 0xFF); |
| *dst++ = (uint8_t)((tmp >> 16) & 0xFF); |
| *dst++ = (uint8_t)((tmp >> 8) & 0xFF); |
| *dst++ = (uint8_t)(tmp & 0xFF); |
| } |
| |
| /* Swap bytes 16-31 (last four registers) */ |
| src = (uint32_t *)(TZ_PUB_KEY_HASH_BASE + SHA256_BYTES / 2); |
| for (i = 0 ; i < words ; i++) { |
| tmp = src[words - 1 - i]; |
| *dst++ = (uint8_t)((tmp >> 24) & 0xFF); |
| *dst++ = (uint8_t)((tmp >> 16) & 0xFF); |
| *dst++ = (uint8_t)((tmp >> 8) & 0xFF); |
| *dst++ = (uint8_t)(tmp & 0xFF); |
| } |
| #endif /* (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \ |
| || (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) */ |
| |
| *key_ptr = (void *)rotpk_hash_der; |
| *key_len = (unsigned int)sizeof(rotpk_hash_der); |
| *flags = ROTPK_IS_HASH; |
| return 0; |
| } |
| |
| /* |
| * Return the non-volatile counter value stored in the platform. The cookie |
| * will contain the OID of the counter in the certificate. |
| * |
| * Return: 0 = success, Otherwise = error |
| */ |
| int plat_get_nv_ctr(void *cookie, unsigned int *nv_ctr) |
| { |
| const char *oid; |
| uint32_t *nv_ctr_addr; |
| |
| assert(cookie != NULL); |
| assert(nv_ctr != NULL); |
| |
| oid = (const char *)cookie; |
| if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| nv_ctr_addr = (uint32_t *)TFW_NVCTR_BASE; |
| } else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| nv_ctr_addr = (uint32_t *)NTFW_CTR_BASE; |
| } else { |
| return 1; |
| } |
| |
| *nv_ctr = (unsigned int)(*nv_ctr_addr); |
| |
| return 0; |
| } |
| |
| /* |
| * Store a new non-volatile counter value. By default on ARM development |
| * platforms, the non-volatile counters are RO and cannot be modified. We expect |
| * the values in the certificates to always match the RO values so that this |
| * function is never called. |
| * |
| * Return: 0 = success, Otherwise = error |
| */ |
| int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr) |
| { |
| return 1; |
| } |
| #else /* ARM_CRYPTOCELL_INTEG */ |
| |
| #include <drivers/arm/cryptocell/cc_rotpk.h> |
| |
| /* |
| * Return the ROTPK hash in the following ASN.1 structure in DER format: |
| * |
| * AlgorithmIdentifier ::= SEQUENCE { |
| * algorithm OBJECT IDENTIFIER, |
| * parameters ANY DEFINED BY algorithm OPTIONAL |
| * } |
| * |
| * DigestInfo ::= SEQUENCE { |
| * digestAlgorithm AlgorithmIdentifier, |
| * digest OCTET STRING |
| * } |
| */ |
| int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, |
| unsigned int *flags) |
| { |
| unsigned char *dst; |
| |
| assert(key_ptr != NULL); |
| assert(key_len != NULL); |
| assert(flags != NULL); |
| |
| /* Copy the DER header */ |
| memcpy(rotpk_hash_der, rotpk_hash_hdr, rotpk_hash_hdr_len); |
| dst = &rotpk_hash_der[rotpk_hash_hdr_len]; |
| *key_ptr = rotpk_hash_der; |
| *key_len = sizeof(rotpk_hash_der); |
| return cc_get_rotpk_hash(dst, SHA256_BYTES, flags); |
| } |
| #endif /* ARM_CRYPTOCELL_INTEG */ |
