Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 1 | /* |
Gilad Ben-Yossef | fbb88a3 | 2019-05-14 10:48:18 +0300 | [diff] [blame] | 2 | * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 3 | * |
dp-arm | fa3cf0b | 2017-05-03 09:38:09 +0100 | [diff] [blame] | 4 | * SPDX-License-Identifier: BSD-3-Clause |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 7 | #include <assert.h> |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 8 | #include <stdint.h> |
| 9 | #include <string.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 10 | |
| 11 | #include <lib/cassert.h> |
| 12 | #include <plat/common/platform.h> |
| 13 | #include <tools_share/tbbr_oid.h> |
Antonio Nino Diaz | a320ecd | 2019-01-15 14:19:50 +0000 | [diff] [blame] | 14 | #include <platform_def.h> |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 15 | |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 16 | /* SHA256 algorithm */ |
| 17 | #define SHA256_BYTES 32 |
| 18 | |
| 19 | /* ROTPK locations */ |
| 20 | #define ARM_ROTPK_REGS_ID 1 |
| 21 | #define ARM_ROTPK_DEVEL_RSA_ID 2 |
Qixiang Xu | 1c2aef1 | 2017-08-24 15:12:20 +0800 | [diff] [blame] | 22 | #define ARM_ROTPK_DEVEL_ECDSA_ID 3 |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 23 | |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 24 | static const unsigned char rotpk_hash_hdr[] = \ |
| 25 | "\x30\x31\x30\x0D\x06\x09\x60\x86\x48" \ |
| 26 | "\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20"; |
| 27 | static const unsigned int rotpk_hash_hdr_len = sizeof(rotpk_hash_hdr) - 1; |
| 28 | static unsigned char rotpk_hash_der[sizeof(rotpk_hash_hdr) - 1 + SHA256_BYTES]; |
| 29 | |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 30 | /* Use the cryptocell variants if Cryptocell is present */ |
| 31 | #if !ARM_CRYPTOCELL_INTEG |
| 32 | #if !ARM_ROTPK_LOCATION_ID |
| 33 | #error "ARM_ROTPK_LOCATION_ID not defined" |
| 34 | #endif |
| 35 | |
| 36 | /* Weak definition may be overridden in specific platform */ |
| 37 | #pragma weak plat_get_nv_ctr |
| 38 | #pragma weak plat_set_nv_ctr |
| 39 | |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 40 | #if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) |
| 41 | static const unsigned char arm_devel_rotpk_hash[] = \ |
| 42 | "\xB0\xF3\x82\x09\x12\x97\xD8\x3A" \ |
| 43 | "\x37\x7A\x72\x47\x1B\xEC\x32\x73" \ |
| 44 | "\xE9\x92\x32\xE2\x49\x59\xF6\x5E" \ |
| 45 | "\x8B\x4A\x4A\x46\xD8\x22\x9A\xDA"; |
Qixiang Xu | 1c2aef1 | 2017-08-24 15:12:20 +0800 | [diff] [blame] | 46 | #elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) |
| 47 | static const unsigned char arm_devel_rotpk_hash[] = \ |
| 48 | "\x2E\x40\xBF\x6E\xF9\x12\xBB\x98" \ |
| 49 | "\x31\x71\x09\x0E\x1E\x15\x3D\x0B" \ |
| 50 | "\xFD\xD1\xCC\x69\x4A\x98\xEB\x8B" \ |
| 51 | "\xA0\xB0\x20\x86\x4E\x6C\x07\x17"; |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 52 | #endif |
| 53 | |
Dan Handley | 9df4804 | 2015-03-19 18:58:55 +0000 | [diff] [blame] | 54 | /* |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 55 | * Return the ROTPK hash in the following ASN.1 structure in DER format: |
| 56 | * |
| 57 | * AlgorithmIdentifier ::= SEQUENCE { |
| 58 | * algorithm OBJECT IDENTIFIER, |
| 59 | * parameters ANY DEFINED BY algorithm OPTIONAL |
| 60 | * } |
| 61 | * |
| 62 | * DigestInfo ::= SEQUENCE { |
| 63 | * digestAlgorithm AlgorithmIdentifier, |
| 64 | * digest OCTET STRING |
| 65 | * } |
| 66 | */ |
| 67 | int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, |
| 68 | unsigned int *flags) |
| 69 | { |
| 70 | uint8_t *dst; |
| 71 | |
| 72 | assert(key_ptr != NULL); |
| 73 | assert(key_len != NULL); |
| 74 | assert(flags != NULL); |
| 75 | |
| 76 | /* Copy the DER header */ |
| 77 | memcpy(rotpk_hash_der, rotpk_hash_hdr, rotpk_hash_hdr_len); |
| 78 | dst = (uint8_t *)&rotpk_hash_der[rotpk_hash_hdr_len]; |
| 79 | |
Qixiang Xu | 1c2aef1 | 2017-08-24 15:12:20 +0800 | [diff] [blame] | 80 | #if (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \ |
| 81 | || (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 82 | memcpy(dst, arm_devel_rotpk_hash, SHA256_BYTES); |
| 83 | #elif (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_REGS_ID) |
| 84 | uint32_t *src, tmp; |
| 85 | unsigned int words, i; |
| 86 | |
| 87 | /* |
| 88 | * Append the hash from Trusted Root-Key Storage registers. The hash has |
| 89 | * not been written linearly into the registers, so we have to do a bit |
| 90 | * of byte swapping: |
| 91 | * |
| 92 | * 0x00 0x04 0x08 0x0C 0x10 0x14 0x18 0x1C |
| 93 | * +---------------------------------------------------------------+ |
| 94 | * | Reg0 | Reg1 | Reg2 | Reg3 | Reg4 | Reg5 | Reg6 | Reg7 | |
| 95 | * +---------------------------------------------------------------+ |
| 96 | * | ... ... | | ... ... | |
| 97 | * | +--------------------+ | +-------+ |
| 98 | * | | | | |
| 99 | * +----------------------------+ +----------------------------+ |
| 100 | * | | | | |
| 101 | * +-------+ | +--------------------+ | |
| 102 | * | | | | |
| 103 | * v v v v |
| 104 | * +---------------------------------------------------------------+ |
| 105 | * | | | |
| 106 | * +---------------------------------------------------------------+ |
| 107 | * 0 15 16 31 |
| 108 | * |
| 109 | * Additionally, we have to access the registers in 32-bit words |
| 110 | */ |
| 111 | words = SHA256_BYTES >> 3; |
| 112 | |
| 113 | /* Swap bytes 0-15 (first four registers) */ |
| 114 | src = (uint32_t *)TZ_PUB_KEY_HASH_BASE; |
| 115 | for (i = 0 ; i < words ; i++) { |
| 116 | tmp = src[words - 1 - i]; |
| 117 | /* Words are read in little endian */ |
| 118 | *dst++ = (uint8_t)((tmp >> 24) & 0xFF); |
| 119 | *dst++ = (uint8_t)((tmp >> 16) & 0xFF); |
| 120 | *dst++ = (uint8_t)((tmp >> 8) & 0xFF); |
| 121 | *dst++ = (uint8_t)(tmp & 0xFF); |
| 122 | } |
| 123 | |
| 124 | /* Swap bytes 16-31 (last four registers) */ |
| 125 | src = (uint32_t *)(TZ_PUB_KEY_HASH_BASE + SHA256_BYTES / 2); |
| 126 | for (i = 0 ; i < words ; i++) { |
| 127 | tmp = src[words - 1 - i]; |
| 128 | *dst++ = (uint8_t)((tmp >> 24) & 0xFF); |
| 129 | *dst++ = (uint8_t)((tmp >> 16) & 0xFF); |
| 130 | *dst++ = (uint8_t)((tmp >> 8) & 0xFF); |
| 131 | *dst++ = (uint8_t)(tmp & 0xFF); |
| 132 | } |
Qixiang Xu | 1c2aef1 | 2017-08-24 15:12:20 +0800 | [diff] [blame] | 133 | #endif /* (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_RSA_ID) \ |
| 134 | || (ARM_ROTPK_LOCATION_ID == ARM_ROTPK_DEVEL_ECDSA_ID) */ |
Juan Castillo | 31a68f0 | 2015-04-14 12:49:03 +0100 | [diff] [blame] | 135 | |
| 136 | *key_ptr = (void *)rotpk_hash_der; |
| 137 | *key_len = (unsigned int)sizeof(rotpk_hash_der); |
| 138 | *flags = ROTPK_IS_HASH; |
| 139 | return 0; |
| 140 | } |
| 141 | |
Juan Castillo | bfb7fa6 | 2016-01-22 11:05:57 +0000 | [diff] [blame] | 142 | /* |
| 143 | * Return the non-volatile counter value stored in the platform. The cookie |
| 144 | * will contain the OID of the counter in the certificate. |
| 145 | * |
| 146 | * Return: 0 = success, Otherwise = error |
| 147 | */ |
| 148 | int plat_get_nv_ctr(void *cookie, unsigned int *nv_ctr) |
| 149 | { |
| 150 | const char *oid; |
| 151 | uint32_t *nv_ctr_addr; |
| 152 | |
| 153 | assert(cookie != NULL); |
| 154 | assert(nv_ctr != NULL); |
| 155 | |
| 156 | oid = (const char *)cookie; |
| 157 | if (strcmp(oid, TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| 158 | nv_ctr_addr = (uint32_t *)TFW_NVCTR_BASE; |
| 159 | } else if (strcmp(oid, NON_TRUSTED_FW_NVCOUNTER_OID) == 0) { |
| 160 | nv_ctr_addr = (uint32_t *)NTFW_CTR_BASE; |
| 161 | } else { |
| 162 | return 1; |
| 163 | } |
| 164 | |
| 165 | *nv_ctr = (unsigned int)(*nv_ctr_addr); |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | /* |
Antonio Nino Diaz | 9d602fe | 2016-05-20 14:14:16 +0100 | [diff] [blame] | 171 | * Store a new non-volatile counter value. By default on ARM development |
| 172 | * platforms, the non-volatile counters are RO and cannot be modified. We expect |
| 173 | * the values in the certificates to always match the RO values so that this |
| 174 | * function is never called. |
Juan Castillo | bfb7fa6 | 2016-01-22 11:05:57 +0000 | [diff] [blame] | 175 | * |
| 176 | * Return: 0 = success, Otherwise = error |
| 177 | */ |
| 178 | int plat_set_nv_ctr(void *cookie, unsigned int nv_ctr) |
| 179 | { |
| 180 | return 1; |
| 181 | } |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 182 | #else /* ARM_CRYPTOCELL_INTEG */ |
| 183 | |
Gilad Ben-Yossef | fbb88a3 | 2019-05-14 10:48:18 +0300 | [diff] [blame] | 184 | #include <drivers/arm/cryptocell/cc_rotpk.h> |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 185 | |
| 186 | /* |
| 187 | * Return the ROTPK hash in the following ASN.1 structure in DER format: |
| 188 | * |
| 189 | * AlgorithmIdentifier ::= SEQUENCE { |
| 190 | * algorithm OBJECT IDENTIFIER, |
| 191 | * parameters ANY DEFINED BY algorithm OPTIONAL |
| 192 | * } |
| 193 | * |
| 194 | * DigestInfo ::= SEQUENCE { |
| 195 | * digestAlgorithm AlgorithmIdentifier, |
| 196 | * digest OCTET STRING |
| 197 | * } |
| 198 | */ |
| 199 | int plat_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len, |
| 200 | unsigned int *flags) |
| 201 | { |
| 202 | unsigned char *dst; |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 203 | |
| 204 | assert(key_ptr != NULL); |
| 205 | assert(key_len != NULL); |
| 206 | assert(flags != NULL); |
| 207 | |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 208 | /* Copy the DER header */ |
| 209 | memcpy(rotpk_hash_der, rotpk_hash_hdr, rotpk_hash_hdr_len); |
| 210 | dst = &rotpk_hash_der[rotpk_hash_hdr_len]; |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 211 | *key_ptr = rotpk_hash_der; |
| 212 | *key_len = sizeof(rotpk_hash_der); |
Gilad Ben-Yossef | fbb88a3 | 2019-05-14 10:48:18 +0300 | [diff] [blame] | 213 | return cc_get_rotpk_hash(dst, SHA256_BYTES, flags); |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 214 | } |
Soby Mathew | 3e6bbda | 2017-06-02 17:44:07 +0100 | [diff] [blame] | 215 | #endif /* ARM_CRYPTOCELL_INTEG */ |