1 /* 2 * Copyright (c) 2022-2023, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 */ 7 8 #include <string.h> 9 10 #include <common/debug.h> 11 #include <measured_boot.h> 12 #include <psa/client.h> 13 #include <psa_manifest/sid.h> 14 15 #include "measured_boot_private.h" 16 17 static void print_byte_array(const uint8_t *array __unused, size_t len __unused) 18 { 19 #if LOG_LEVEL >= LOG_LEVEL_INFO 20 size_t i; 21 22 if (array == NULL || len == 0U) { 23 (void)printf("\n"); 24 } else { 25 for (i = 0U; i < len; ++i) { 26 (void)printf(" %02x", array[i]); 27 if ((i & U(0xF)) == U(0xF)) { 28 (void)printf("\n"); 29 if (i < (len - 1U)) { 30 INFO("\t\t:"); 31 } 32 } 33 } 34 } 35 #endif 36 } 37 38 static void log_measurement(uint8_t index, 39 const uint8_t *signer_id, 40 size_t signer_id_size, 41 const uint8_t *version, /* string */ 42 size_t version_size, 43 const uint8_t *sw_type, /* string */ 44 size_t sw_type_size, 45 uint32_t measurement_algo, 46 const uint8_t *measurement_value, 47 size_t measurement_value_size, 48 bool lock_measurement) 49 { 50 INFO("Measured boot extend measurement:\n"); 51 INFO(" - slot : %u\n", index); 52 INFO(" - signer_id :"); 53 print_byte_array(signer_id, signer_id_size); 54 INFO(" - version : %s\n", version); 55 INFO(" - version_size: %zu\n", version_size); 56 INFO(" - sw_type : %s\n", sw_type); 57 INFO(" - sw_type_size: %zu\n", sw_type_size); 58 INFO(" - algorithm : %x\n", measurement_algo); 59 INFO(" - measurement :"); 60 print_byte_array(measurement_value, measurement_value_size); 61 INFO(" - locking : %s\n", lock_measurement ? "true" : "false"); 62 } 63 64 psa_status_t 65 rss_measured_boot_extend_measurement(uint8_t index, 66 const uint8_t *signer_id, 67 size_t signer_id_size, 68 const uint8_t *version, 69 size_t version_size, 70 uint32_t measurement_algo, 71 const uint8_t *sw_type, 72 size_t sw_type_size, 73 const uint8_t *measurement_value, 74 size_t measurement_value_size, 75 bool lock_measurement) 76 { 77 struct measured_boot_extend_iovec_t extend_iov = { 78 .index = index, 79 .lock_measurement = lock_measurement, 80 .measurement_algo = measurement_algo, 81 .sw_type = {0}, 82 .sw_type_size = sw_type_size, 83 }; 84 85 if (version_size > VERSION_MAX_SIZE) { 86 return PSA_ERROR_INVALID_ARGUMENT; 87 } 88 89 90 if (version_size > 0 && version[version_size - 1] == '\0') { 91 version_size--; 92 } 93 94 psa_invec in_vec[] = { 95 {.base = &extend_iov, 96 .len = sizeof(struct measured_boot_extend_iovec_t)}, 97 {.base = signer_id, .len = signer_id_size}, 98 {.base = version, .len = version_size }, 99 {.base = measurement_value, .len = measurement_value_size} 100 }; 101 102 if (sw_type != NULL) { 103 if (extend_iov.sw_type_size > SW_TYPE_MAX_SIZE) { 104 return PSA_ERROR_INVALID_ARGUMENT; 105 } 106 if (sw_type_size > 0 && sw_type[sw_type_size - 1] == '\0') { 107 extend_iov.sw_type_size--; 108 } 109 memcpy(extend_iov.sw_type, sw_type, extend_iov.sw_type_size); 110 } 111 112 log_measurement(index, signer_id, signer_id_size, 113 version, version_size, sw_type, sw_type_size, 114 measurement_algo, measurement_value, 115 measurement_value_size, lock_measurement); 116 117 return psa_call(RSS_MEASURED_BOOT_HANDLE, 118 RSS_MEASURED_BOOT_EXTEND, 119 in_vec, IOVEC_LEN(in_vec), 120 NULL, 0); 121 } 122 123 psa_status_t rss_measured_boot_read_measurement(uint8_t index, 124 uint8_t *signer_id, 125 size_t signer_id_size, 126 size_t *signer_id_len, 127 uint8_t *version, 128 size_t version_size, 129 size_t *version_len, 130 uint32_t *measurement_algo, 131 uint8_t *sw_type, 132 size_t sw_type_size, 133 size_t *sw_type_len, 134 uint8_t *measurement_value, 135 size_t measurement_value_size, 136 size_t *measurement_value_len, 137 bool *is_locked) 138 { 139 psa_status_t status; 140 struct measured_boot_read_iovec_in_t read_iov_in = { 141 .index = index, 142 .sw_type_size = sw_type_size, 143 .version_size = version_size, 144 }; 145 146 struct measured_boot_read_iovec_out_t read_iov_out; 147 148 psa_invec in_vec[] = { 149 {.base = &read_iov_in, 150 .len = sizeof(struct measured_boot_read_iovec_in_t)}, 151 }; 152 153 psa_outvec out_vec[] = { 154 {.base = &read_iov_out, 155 .len = sizeof(struct measured_boot_read_iovec_out_t)}, 156 {.base = signer_id, .len = signer_id_size}, 157 {.base = measurement_value, .len = measurement_value_size} 158 }; 159 160 status = psa_call(RSS_MEASURED_BOOT_HANDLE, RSS_MEASURED_BOOT_READ, 161 in_vec, IOVEC_LEN(in_vec), 162 out_vec, IOVEC_LEN(out_vec)); 163 164 if (status == PSA_SUCCESS) { 165 *is_locked = read_iov_out.is_locked; 166 *measurement_algo = read_iov_out.measurement_algo; 167 *sw_type_len = read_iov_out.sw_type_len; 168 *version_len = read_iov_out.version_len; 169 memcpy(sw_type, read_iov_out.sw_type, read_iov_out.sw_type_len); 170 memcpy(version, read_iov_out.version, read_iov_out.version_len); 171 *signer_id_len = out_vec[1].len; 172 *measurement_value_len = out_vec[2].len; 173 } 174 175 return status; 176 } 177