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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Jan 2023 11:43:50.2479 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9e1e461b-c180-4086-5861-08db005bc22a X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DBAEUR03FT051.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB9647 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Mate Toth-Pal Add tests for Attestation and measurement related RSI calls. Signed-off-by: Mate Toth-Pal Co-developed-by: Suzuki K Poulose [ Rewrote the test cases, keeping the core testing data/logic ] Signed-off-by: Suzuki K Poulose Signed-off-by: Joey Gouly --- arm/Makefile.arm64 | 1 + arm/realm-attest.c | 1125 ++++++++++++++++++++++++++++++++++++++++++++ arm/unittests.cfg | 50 ++ lib/libcflat.h | 1 + 4 files changed, 1177 insertions(+) create mode 100644 arm/realm-attest.c diff --git a/arm/Makefile.arm64 b/arm/Makefile.arm64 index f57d0a95..0a0c4f2c 100644 --- a/arm/Makefile.arm64 +++ b/arm/Makefile.arm64 @@ -41,6 +41,7 @@ tests += $(TEST_DIR)/micro-bench.flat tests += $(TEST_DIR)/cache.flat tests += $(TEST_DIR)/debug.flat tests += $(TEST_DIR)/realm-rsi.flat +tests += $(TEST_DIR)/realm-attest.flat tests += $(TEST_DIR)/realm-fpu.flat tests += $(TEST_DIR)/realm-sea.flat diff --git a/arm/realm-attest.c b/arm/realm-attest.c new file mode 100644 index 00000000..6c357fb5 --- /dev/null +++ b/arm/realm-attest.c @@ -0,0 +1,1125 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 Arm Limited. + * All rights reserved. + */ +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + + +#define SHA256_SIZE 32 + +struct challenge { + unsigned long words[8]; +}; + +struct measurement { + unsigned long words[8]; +}; + +static char __attribute__((aligned(SZ_2M))) __attribute__((section(".data"))) + block_buf_data[SZ_2M * 2]; + +static char __attribute__((aligned(SZ_2M))) __attribute__((section(".bss"))) + block_buf_bss[SZ_2M]; + +static char __attribute__((aligned(SZ_4K))) __attribute__((section(".data"))) + page_buf_data[SZ_4K]; + +static char __attribute__((aligned(SZ_4K))) __attribute__((section(".bss"))) + page_buf_bss[SZ_4K]; + +/* Page aligned offset within the block mapped buffer */ +#define BLOCK_BUF_OFFSET (SZ_8K) + +static inline void debug_print_raw_token(void *buf, size_t size) +{ +#ifdef PRINT_RAW_TOKEN + print_raw_token(buf, size); +#endif +} + +static inline void debug_print_token(struct attestation_claims *claim) +{ +#ifdef PRINT_TOKEN + print_token(claim); +#endif +} + +static bool claims_verify_token(char *token, size_t token_size, + struct attestation_claims *claims, + bool report_success) +{ + int verify_rc = verify_token(token, token_size, claims); + int cpu = smp_processor_id(); + + if (verify_rc == TOKEN_VERIFICATION_ERR_SUCCESS) { + if (report_success) + report(true, "CPU%d: Verfication of token passed", cpu); + return true; + } + + report(false, + "CPU%d: Verification of token failed with error code %d", + cpu, verify_rc); + + return false; +} + +static inline void attest_token_init(phys_addr_t addr, + struct challenge *ch, + struct smccc_result *res) +{ + rsi_attest_token_init(addr, &ch->words[0], res); +} + + +static inline void attest_token_continue(phys_addr_t addr, + struct smccc_result *res) +{ + rsi_attest_token_continue(addr, res); +} + +static inline void attest_token_complete(phys_addr_t addr, + struct smccc_result *res) +{ + do { + attest_token_continue(addr, res); + } while (res->r0 == RSI_INCOMPLETE); +} + +static void get_attest_token(phys_addr_t ipa, + struct challenge *ch, + struct smccc_result *res) +{ + attest_token_init(ipa, ch, res); + + if (res->r0) + return; + attest_token_complete(ipa, res); +} + +/* + * __get_attest_token_claims: Get attestation token and verify the claims. + * If @claims is not NULL, token is parsed and the @claims is populated. + * All failures reported. Success is only reported if the @report_success is + * true. + * Returns whether the calls and verification succeeds + */ +static bool __get_attest_token_claims(void *buf, struct challenge *ch, + struct attestation_claims *claims, + size_t *token_size, bool report_success) +{ + struct smccc_result result; + struct attestation_claims local_claims; + struct attestation_claims *claimsp; + bool rc = false; + + /* Use the local_claims if claims is not supplied */ + claimsp = claims ? : &local_claims; + + get_attest_token(virt_to_phys(buf), ch, &result); + if (result.r0) { + report(false, "Get attestation token with : %ld", result.r0); + return rc; + } + + if (report_success) + report(true, "Get attestation token"); + + /* Update token_size if necessary */ + if (token_size) + *token_size = result.r1; + + return claims_verify_token(buf, result.r1, claimsp, report_success); +} + +static bool get_attest_token_claims(void *buf, struct challenge *ch, + struct attestation_claims *claims, + size_t *token_size) +{ + return __get_attest_token_claims(buf, ch, claims, token_size, false); +} + +static void get_verify_attest_token(void *buf, struct challenge *ch, + const char *desc) +{ + report_prefix_push(desc); + __get_attest_token_claims(buf, ch, NULL, NULL, true); + report_prefix_pop(); +} + +static void get_verify_attest_token_verbose(void *buf, + struct challenge *ch, + const char *desc) +{ + size_t token_size; + struct attestation_claims claims; + + report_prefix_push(desc); + if (__get_attest_token_claims(buf, ch, &claims, &token_size, true)) { + debug_print_raw_token(buf, token_size); + debug_print_token(&claims); + } + report_prefix_pop(); +} + +static void test_get_attest_token(void) +{ + char stack_buf[SZ_4K]__attribute__((aligned(SZ_4K))); + char *heap_buf; + struct challenge ch; + + memset(&ch, 0xAB, sizeof(ch)); + + /* Heap buffer */ + heap_buf = memalign(SZ_4K, SZ_4K); + if (heap_buf) { + get_verify_attest_token(heap_buf, &ch, "heap buffer"); + free(heap_buf); + } else { + report_skip("heap buffer: Failed to allocate"); + } + + /* Stack buffer */ + get_verify_attest_token(stack_buf, &ch, "stack buffer"); + /* Page aligned buffer .data segment */ + get_verify_attest_token(page_buf_data, &ch, ".data segment buffer"); + /* Page aligned buffer .bss segment */ + get_verify_attest_token(page_buf_bss, &ch, ".bss segment buffer"); + /* Block mapped buffer in .data segment */ + get_verify_attest_token(&block_buf_data[BLOCK_BUF_OFFSET], &ch, + "block mapped .data segment buffer"); + /* Block mapped buffer in .bss segment */ + get_verify_attest_token_verbose(&block_buf_bss[BLOCK_BUF_OFFSET], + &ch, "block mapped .bss segment buffer"); +} + +static void get_attest_token_check_fail(phys_addr_t ipa, + struct challenge *ch, + return_code_t exp, + const char *buf_desc) +{ + struct smccc_result result; + return_code_t rc; + + report_prefix_push(buf_desc); + get_attest_token(ipa, ch, &result); + rc = unpack_return_code(result.r0); + if (rc.status != exp.status) { + report(false, "Get attestation token " + "got (%d) expected (%d)", + rc.status, exp.status); + } else { + report(true, "Get attestation token fails as expected"); + } + report_prefix_pop(); +} + +static void test_get_attest_token_bad_input(void) +{ + struct challenge ch; + return_code_t exp; + + memset(page_buf_data, 0, sizeof(page_buf_data)); + memset(&ch, 0xAB, sizeof(ch)); + exp = make_return_code(RSI_ERROR_INPUT, 0); + get_attest_token_check_fail(virt_to_phys(page_buf_data + 0x100), + &ch, exp, "unaligned buffer"); + get_attest_token_check_fail(__phys_end + SZ_512M, &ch, exp, + "buffer outside PAR"); +} + +static void test_get_attest_token_abi_misuse(void) +{ + struct smccc_result result; + struct challenge ch; + phys_addr_t ipa = virt_to_phys(page_buf_data); + return_code_t rc; + + memset(&ch, 0xAB, sizeof(ch)); + + /* + * Testcase 1 - Miss call to RSI_ATTEST_TOKEN_INIT + * + * step1. Execute a successful test to reset the state machine. + */ + report_prefix_push("miss token init"); + get_attest_token(ipa, &ch, &result); + if (result.r0) { + report(false, "Get attestation failed %ld", result.r0); + report_prefix_pop(); /* miss token init */ + return; + } + /* + * step2. Execute RSI_ATTEST_TOKEN_CONTINUE without an RSI_ATTEST_TOKEN_INIT. + * Expect an error == RSI_ERROR_STATE + */ + attest_token_continue(ipa, &result); + rc = unpack_return_code(result.r0); + if (rc.status != RSI_ERROR_STATE) { + report(false, "Unexpected result (%d, %d) vs (%d) expected", + rc.status, rc.index, RSI_ERROR_STATE); + report_prefix_pop(); /* miss token init */ + return; + } + + report(true, "Fails as expected"); + report_prefix_pop(); /* miss token init */ + + /* + * Test case 2 - Calling with inconsistend input. + * step1. Issue RSI_ATTEST_TOKEN_INIT + * step2. Modify the challenge and issue RSI_ATTEST_TOKEN_CONTINUE. + * Test : Expect error == (RSI_ERROR_INPUT, 0) + */ + report_prefix_push("inconsistent input"); + attest_token_init(ipa, &ch, &result); + rc = unpack_return_code(result.r0); + if (result.r0) { + report(false, "RSI_ATTEST_TOKEN_INIT failed unexpectedly (%d, %d)", + rc.status, rc.index); + report_prefix_pop(); /* inconsistent input */ + return; + } + + /* + * Corrupt the IPA address input to ATTEST_TOKEN_CONTINUE, + */ + attest_token_continue(ipa ^ 0x1UL, &result); + rc = unpack_return_code(result.r0); + if (rc.status != RSI_ERROR_INPUT) { + report(false, "Attest token continue unexpected results" + " (%d) vs expected (%d)", + rc.status, RSI_ERROR_INPUT); + } + + report_prefix_pop(); /* inconsistent input */ + + /* + * Test case 3 + * step1. Complete the token attestation from with proper values. + * Failures in the Test case 2 should not affect the completion. + */ + report_prefix_push("valid input after inconsistent input"); + attest_token_complete(ipa, &result); + rc = unpack_return_code(result.r0); + if (result.r0) { + report(false, "Attest token continue failed with (%d, %d)", + rc.status, rc.index); + return; + } else { + report(true, "Attest token continue complete"); + } + report_prefix_pop(); /* Valid input after inconsistent input */ +} + +static void test_get_attest_token_abi_abort_req(void) +{ + int i; + char *p; + size_t size; + struct attestation_claims claims; + struct smccc_result result; + struct challenge ch; + char stack_buf[SZ_4K] __attribute__((aligned(SZ_4K))) = { 0 }; + phys_addr_t addr = virt_to_phys(stack_buf); + + /* Set the initial challenge, which will be aborted */ + memset(&ch, 0xAB, sizeof(ch)); + attest_token_init(addr, &ch, &result); + if (result.r0) { + report(false, "Attest token init failed %ld", result.r0); + return; + } + + /* Execute a few cycles, but not let it complete */ + for (i = 0; i < 3; i++) { + attest_token_continue(addr, &result); + if (result.r0 != RSI_INCOMPLETE) { + if (result.r0) + report(false, "Attest token continue : unexpected " + "failure %ld", result.r0); + else + report_skip("Attest token finished at iteration %d", + i + 1); + return; + } + } + + /* Issue a fresh Attest Token request with updated challenge */ + memset(&ch, 0xEE, sizeof(ch)); + get_attest_token(addr, &ch, &result); + if (result.r0) { + report(false, "Attest Token failed %ld", result.r0); + return; + } + claims_verify_token(stack_buf, result.r1, &claims, false); + + /* + * TODO: Index of claim in the array depends on the init sequence + * in token_verifier.c: init_claim() + */ + p = (char*)claims.realm_token_claims[0].buffer_data.ptr; + size = claims.realm_token_claims[0].buffer_data.len; + + /* Verify that token contains the updated challenge. */ + if (size != sizeof(ch)) { + report(false, "Attestation token: abort request: " + "claim size mismatch : %ld", result.r0); + return; + } + if (memcmp(p, &ch, size)) { + report(false, "Attestation token: abort request: " + "claim value mismatch: %ld", result.r0); + return; + } + report(true, "Aborting ongoing request"); +} + +static void run_rsi_attest_tests(void) +{ + report_prefix_push("attest"); + + test_get_attest_token(); + + report_prefix_push("bad input"); + test_get_attest_token_bad_input(); + report_prefix_pop(); + + report_prefix_push("ABI misuse"); + test_get_attest_token_abi_misuse(); + report_prefix_pop(); + + report_prefix_push("ABI Abort"); + test_get_attest_token_abi_abort_req(); + report_prefix_pop(); + + report_prefix_pop(); /* attest */ +} + +static void run_get_token_times(void *data) +{ + char buf[SZ_4K] __attribute__((aligned(SZ_4K))); + struct challenge ch; + struct attestation_claims claims; + unsigned long runs = ((size_t)data); + int i, j; + int cpu = smp_processor_id(); + + report_info("CPU%d: Running get token test %ld times", cpu, runs); + for (i = 0; i < runs; i++) { + uint8_t pattern = (cpu << 4) | (i & 0xf); + size_t token_size; + struct claim_t *claim; + + memset(buf, 0, sizeof(buf)); + memset(&ch, pattern, sizeof(ch)); + + if (!get_attest_token_claims(buf, &ch, &claims, &token_size)) + return; + claim = claims.realm_token_claims; + if (claim->key != CCA_REALM_CHALLENGE || + claim->buffer_data.len != sizeof(ch)) { + report(false, "Invalid challenge size in parsed token:" + " %zu (expected %zu)", + claim->buffer_data.len, sizeof(ch)); + return; + } + + for (j = 0; j < sizeof(ch); j++) { + uint8_t byte = ((uint8_t *)claim->buffer_data.ptr)[j]; + if (byte != pattern) { + report(false, "Invalid byte in challenge[%d]: " + " %02x (expected %02x)", + j, byte, pattern); + return; + } + } + } + report(true, "CPU%d: Completed runs", cpu); +} + +static void run_rsi_attest_smp_test(void) +{ + unsigned long runs = 100; + + report_prefix_push("attest_smp"); + on_cpus(run_get_token_times, (void *)runs); + report_prefix_pop(); +} + +/* + * There are 7 slots for measurements. The first is reserved for initial + * content measurement. The rest are meant to store runtime measurements. + * Runtime measurements are extended (concatenated and hashed). Reading + * them back separately is unsupported. They can be queried in an + * attestation token. + * + * Measurement size is 64bytes maximum to accommodate a SHA512 hash. + */ + +static void measurement_extend(int idx, struct measurement *m, size_t size, + struct smccc_result *res) +{ + rsi_extend_measurement(idx, size, &m->words[0], res); +} + +static void test_extend_measurement(void) +{ + struct smccc_result result; + struct measurement m; + return_code_t rc; + int idx; + + memset(&m, 0xEE, sizeof(m)); + /* + * Store Runtime measurements for all possible slots. + */ + for (idx = 1; idx <= REM_COUNT; idx ++) { + measurement_extend(idx, &m, sizeof(m.words), &result); + rc = unpack_return_code(result.r0); + report(!rc.status, "Extend measurement idx: %d (%d, %d)", + idx, rc.status, rc.index); + } +} + +static void test_extend_measurement_bad_index(struct measurement *m) +{ + struct smccc_result result; + return_code_t rc; + int indices[] = { 0, REM_COUNT + 1 }; + const char *idx_descs[] = { "reserved", "out-of-bounds" }; + int i; + + report_prefix_push("index"); + for (i = 0; i < ARRAY_SIZE(indices); i++) { + report_prefix_push(idx_descs[i]); + measurement_extend(indices[i], m, sizeof(m->words), &result); + rc = unpack_return_code(result.r0); + + if (rc.status != RSI_ERROR_INPUT) + report(false, "Extend measurement index: " + "actual (%d) vs expected (%d)", + rc.status, RSI_ERROR_INPUT); + else + report(true, "Extend measurement index fails as expected"); + report_prefix_pop(); /* idx_descs[i] */ + } + report_prefix_pop(); /* index */ +} + +static void test_extend_measurement_bad_size(struct measurement *m) +{ + struct smccc_result result; + return_code_t rc; + + report_prefix_push("size"); + rsi_extend_measurement(1, 65, &m->words[0], &result); + rc = unpack_return_code(result.r0); + if (rc.status != RSI_ERROR_INPUT) + report(false, "Measurement extend " + "actual (%d) vs expected (%d)", + rc.status, RSI_ERROR_INPUT); + else + report(true, "Extend measurement fails as expected"); + report_prefix_pop(); /* size */ +} + +static void test_extend_measurement_bad_input(void) +{ + struct measurement m; + + report_prefix_push("bad input"); + memset(&m, 0xEE, sizeof(m)); + test_extend_measurement_bad_index(&m); + test_extend_measurement_bad_size(&m); + report_prefix_pop(); /* bad input */ +} + +static void run_rsi_extend_tests(void) +{ + report_prefix_push("extend"); + test_extend_measurement(); + test_extend_measurement_bad_input(); + report_prefix_pop(); /* extend */ +} + +/* + * cpu_extend_run - Parameters for the extend measurement SMP run. + * @idx - Pointer to the index + * @size - Size of the measurement data + * @m - Measurement data. + */ +struct cpu_extend_run { + int *idx; + struct measurement *m; + size_t size; + unsigned long rc; +}; + +/* + * We get an array of the parameters for the extend measurement. + * The cpu number is the index to the array. At the moment we + * only support 2 cpus. + */ +static void cpu_run_extend_measurement(void *data) +{ + struct smccc_result result; + struct cpu_extend_run *run; + int me = smp_processor_id(); + + assert(me >= 0); + + /* Tests for only 2 CPUs */ + if (me > 1) + return; + run = (struct cpu_extend_run *)data + me; + rsi_extend_measurement(*run->idx, run->size, &run->m->words[0], &result); + run->rc = result.r0; + if (result.r0 != 0) + report(false, "CPU%d: Extend measurement failed for slot %d", + me, *run->idx); +} + +static bool claims_uses_sha256_algo(struct attestation_claims *claims) +{ + struct claim_t *claim = claims->realm_token_claims + 2; /* CCA_REALM_HASH_ALGO_ID */ + + /* claim->buffer_data.ptr: Not NULL terminated, so using memcmp */ + return !memcmp(claim->buffer_data.ptr, "sha-256", strlen("sha-256")); +} + +static void test_rsi_extend_smp(void) +{ + int slot, m_idx; + struct measurement m[2]; + struct challenge ch; + struct attestation_claims claims; + size_t token_size; + + /* + * Measurements to extend with + * + * Run CPU0 data CPU1 data + * 1: [31 - 0] [55 - 24] + * 2: [39 - 8] [63 - 32] + * 3: [47 - 16] [71 - 40] + */ + char measure_bytes[] = { + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 + }; + + /* + * The expected measurement values. Each element in the array contains + * a possible extended measurement value. (Multiple values are possible + * as the extend function might be called in any order by the cores.) + * The array contains results for all the possible orders. The number of + * possibilities can be calculated as here: + * https://math.stackexchange.com/q/1065374 + */ + struct extend_smp_expected { + const char *sequence; + char measurement[SHA256_SIZE]; + } expected[] = { + { + "[ cpu0#0 cpu0#1 cpu0#2 cpu1#0 cpu1#1 cpu1#2 ]", + { + 0xB1, 0xBE, 0x04, 0x25, 0xBB, 0xBC, 0x04, 0x9F, + 0x98, 0x4F, 0xFB, 0xDE, 0xAA, 0x00, 0xC9, 0xBC, + 0x41, 0x43, 0xDB, 0x16, 0xBB, 0x2A, 0x5F, 0x4B, + 0x8B, 0x36, 0xAE, 0x3F, 0xFE, 0x24, 0x23, 0xA4 + }, + }, + { + "[ cpu0#0 cpu0#1 cpu1#0 cpu0#2 cpu1#1 cpu1#2 ]", + { + 0x99, 0x00, 0x5E, 0xB7, 0xF8, 0x84, 0xA3, 0x99, + 0x7E, 0x12, 0xDE, 0xD1, 0x5B, 0xA7, 0x07, 0xF4, + 0x24, 0x3E, 0x77, 0xED, 0x60, 0xC0, 0xBD, 0x43, + 0x3B, 0x60, 0x7E, 0x38, 0xDD, 0x58, 0xC7, 0x46 + }, + }, + { + "[ cpu0#0 cpu0#1 cpu1#0 cpu1#1 cpu0#2 cpu1#2 ]", + { + 0x0B, 0x5E, 0x31, 0x69, 0xAC, 0xAF, 0xA0, 0x8B, + 0x4F, 0x90, 0xD1, 0x86, 0xCC, 0x8E, 0x11, 0x42, + 0x0B, 0x74, 0x49, 0x6C, 0xA1, 0x27, 0x1B, 0x7C, + 0x52, 0x77, 0x7F, 0x2F, 0x53, 0x2F, 0x9A, 0xC1 + }, + }, + { + "[ cpu0#0 cpu0#1 cpu1#0 cpu1#1 cpu1#2 cpu0#2 ]", + { + 0x99, 0xDE, 0xF8, 0x02, 0x27, 0xE9, 0x6F, 0x6F, + 0xA6, 0x55, 0xFC, 0x56, 0xCC, 0x7A, 0xFC, 0xEF, + 0x2F, 0x0C, 0x45, 0x3E, 0x01, 0xE0, 0x4B, 0xA1, + 0x60, 0x96, 0xEE, 0xB1, 0x4A, 0x25, 0x86, 0x89}, + }, + { + "[ cpu0#0 cpu1#0 cpu0#1 cpu0#2 cpu1#1 cpu1#2 ]", + { 0x88, 0x40, 0x05, 0xF5, 0xA6, 0x95, 0xC1, 0xC7, + 0xD3, 0x69, 0x16, 0x82, 0x0D, 0x79, 0xC1, 0x5B, + 0x4A, 0x48, 0xCA, 0x7F, 0xA5, 0xF3, 0x77, 0x37, + 0xBE, 0x0D, 0xAC, 0x2E, 0x42, 0x3E, 0x03, 0x37 + }, + }, + { + "[ cpu0#0 cpu1#0 cpu0#1 cpu1#1 cpu0#2 cpu1#2 ]", + { + 0x68, 0x32, 0xC6, 0xAF, 0x8C, 0x86, 0x77, 0x09, + 0x4A, 0xB9, 0xA1, 0x9E, 0xBB, 0x2B, 0x42, 0x35, + 0xF8, 0xDE, 0x9A, 0x98, 0x37, 0x7B, 0x3E, 0x82, + 0x59, 0x0B, 0xC4, 0xAD, 0x1D, 0x01, 0x28, 0xCA + }, + }, + { + "[ cpu0#0 cpu1#0 cpu0#1 cpu1#1 cpu1#2 cpu0#2 ]", + { + 0xF5, 0x96, 0x77, 0x68, 0xD9, 0x6A, 0xA2, 0xFC, + 0x08, 0x8C, 0xF5, 0xA9, 0x6B, 0xE7, 0x1E, 0x20, + 0x35, 0xC1, 0x92, 0xCE, 0xBC, 0x3A, 0x75, 0xEA, + 0xB4, 0xEB, 0x17, 0xE5, 0x77, 0x50, 0x85, 0x40 + }, + + }, + { + "[ cpu0#0 cpu1#0 cpu1#1 cpu0#1 cpu0#2 cpu1#2 ]", + { + 0x4E, 0xA2, 0xD2, 0x79, 0x55, 0x75, 0xCB, 0x86, + 0x87, 0x34, 0x35, 0xE7, 0x75, 0xDF, 0xD5, 0x59, + 0x58, 0xDE, 0x74, 0x35, 0x68, 0x2B, 0xDC, 0xC8, + 0x85, 0x72, 0x97, 0xBE, 0x58, 0xB1, 0x1E, 0xA7 + }, + + }, + { + "[ cpu0#0 cpu1#0 cpu1#1 cpu0#1 cpu1#2 cpu0#2 ]", + { + 0xD1, 0xC2, 0xC8, 0x08, 0x00, 0x64, 0xB8, 0x1F, + 0xA0, 0xA5, 0x32, 0x20, 0xAA, 0x08, 0xC0, 0x48, + 0xDB, 0xB1, 0xED, 0xE7, 0xAF, 0x18, 0x2F, 0x7F, + 0x3C, 0xB8, 0x58, 0x83, 0xEC, 0xF9, 0x38, 0xFD + }, + + }, + { + "[ cpu0#0 cpu1#0 cpu1#1 cpu1#2 cpu0#1 cpu0#2 ]", + { + 0xD1, 0xB8, 0x31, 0x98, 0x8E, 0xF2, 0xE7, 0xF5, + 0xBB, 0xD1, 0xE1, 0xC7, 0x3E, 0xB7, 0xA9, 0x18, + 0x3B, 0xCC, 0x58, 0x98, 0xED, 0x22, 0x1E, 0xE2, + 0x04, 0x76, 0xA1, 0xB9, 0x92, 0x54, 0xB5, 0x5B + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu0#1 cpu0#2 cpu1#1 cpu1#2 ]", + { + 0xAB, 0x50, 0x2A, 0x68, 0x28, 0x35, 0x16, 0xA9, + 0xDE, 0x26, 0x77, 0xAA, 0x99, 0x29, 0x0E, 0x9C, + 0x67, 0x41, 0x64, 0x28, 0x6E, 0xFF, 0x54, 0x33, + 0xE5, 0x29, 0xC4, 0xA5, 0x98, 0x40, 0x7E, 0xC9 + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu0#1 cpu1#1 cpu0#2 cpu1#2 ]", + { + 0xA3, 0x4D, 0xB0, 0x28, 0xAB, 0x01, 0x56, 0xBB, + 0x7D, 0xE5, 0x0E, 0x86, 0x26, 0xBB, 0xBB, 0xDE, + 0x58, 0x91, 0x88, 0xBB, 0x9F, 0x6A, 0x58, 0x78, + 0x30, 0x2C, 0x22, 0x2E, 0x85, 0x7F, 0x87, 0xF6 + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu0#1 cpu1#1 cpu1#2 cpu0#2 ]", + { + 0x1A, 0x2E, 0xD2, 0xC2, 0x0C, 0xBD, 0x30, 0xDA, + 0x4F, 0x37, 0x6B, 0x90, 0xE3, 0x67, 0xFE, 0x61, + 0x4F, 0x30, 0xBB, 0x29, 0xBC, 0xAA, 0x6E, 0xC5, + 0x60, 0x6E, 0x13, 0x6B, 0x33, 0x3D, 0xC0, 0x11 + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu1#1 cpu0#1 cpu0#2 cpu1#2 ]", + { + 0x8F, 0xEA, 0xD1, 0x80, 0xE0, 0xBE, 0x27, 0xF7, + 0x8D, 0x19, 0xBF, 0x65, 0xBE, 0x92, 0x83, 0x7C, + 0x61, 0x8F, 0xC5, 0x8D, 0x0F, 0xAD, 0x89, 0x1E, + 0xAE, 0x0A, 0x75, 0xAC, 0x3E, 0x5F, 0xD5, 0x31 + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu1#1 cpu0#1 cpu1#2 cpu0#2 ]", + { + 0x0F, 0x7B, 0xEE, 0xA5, 0x9A, 0xCD, 0xED, 0x8D, + 0x5A, 0x52, 0xFF, 0xD6, 0x30, 0xF4, 0xD9, 0xE9, + 0xF4, 0xC1, 0x1A, 0x0C, 0x86, 0x2B, 0x96, 0x2C, + 0x0E, 0x2D, 0x1A, 0x2A, 0xFE, 0xE6, 0x7C, 0xAD + }, + + }, + { + "[ cpu1#0 cpu0#0 cpu1#1 cpu1#2 cpu0#1 cpu0#2 ]", + { + 0x4A, 0xBA, 0xFF, 0x0B, 0x0B, 0x06, 0xD1, 0xCE, + 0x95, 0x91, 0x70, 0x68, 0x20, 0xD6, 0xF2, 0x23, + 0xC5, 0x6A, 0x63, 0x2B, 0xCA, 0xDF, 0x37, 0xB5, + 0x0B, 0xDC, 0x64, 0x6A, 0xA3, 0xC9, 0x8F, 0x1E + }, + + }, + { + "[ cpu1#0 cpu1#1 cpu0#0 cpu0#1 cpu0#2 cpu1#2 ]", + { + 0x3D, 0xB1, 0xE1, 0xBD, 0x85, 0x2C, 0xA0, 0x04, + 0xE6, 0x43, 0xE8, 0x82, 0xC3, 0x77, 0xF3, 0xCE, + 0x4D, 0x62, 0x2C, 0xF4, 0x65, 0xF6, 0x29, 0x5F, + 0x17, 0xDA, 0xD5, 0x79, 0x55, 0xE2, 0x3D, 0x0C + }, + + }, + { + "[ cpu1#0 cpu1#1 cpu0#0 cpu0#1 cpu1#2 cpu0#2 ]", + { + 0x5B, 0xFE, 0x29, 0xA4, 0xDA, 0x9F, 0xE7, 0x13, + 0x5F, 0xA2, 0xCE, 0x53, 0x40, 0xC0, 0x38, 0xBC, + 0x10, 0x7A, 0xF0, 0x29, 0x3C, 0xD6, 0xAF, 0x8A, + 0x03, 0x40, 0xED, 0xE1, 0xFD, 0x46, 0xB7, 0x06 + }, + + }, + { + "[ cpu1#0 cpu1#1 cpu0#0 cpu1#2 cpu0#1 cpu0#2 ]", + { + 0x66, 0x20, 0xA7, 0xBE, 0xED, 0x90, 0x0A, 0x14, + 0x95, 0x7A, 0x93, 0x47, 0x1E, 0xA8, 0xDD, 0x6E, + 0x25, 0xCB, 0x73, 0x18, 0x77, 0x77, 0x91, 0xE9, + 0xCA, 0x17, 0x26, 0x16, 0xAA, 0xC9, 0x34, 0x7A + }, + + }, + { + "[ cpu1#0 cpu1#1 cpu1#2 cpu0#0 cpu0#1 cpu0#2 ]", + { + 0x4D, 0xF6, 0xC7, 0x74, 0x37, 0x66, 0x4C, 0x6A, + 0x40, 0x32, 0x94, 0x01, 0x17, 0xA2, 0xE6, 0x3D, + 0xA8, 0x00, 0x3E, 0xB7, 0x89, 0x24, 0xF4, 0x04, + 0x14, 0xA8, 0xA1, 0xD1, 0xCD, 0x5B, 0xC3, 0x60 + }, + + }, + }; + + struct cpu_extend_run cpus[2] = { + /* CPU0 */ + { .idx = &slot, .m = &m[0], .size = SHA256_SIZE }, + /* CPU1 */ + { .idx = &slot, .m = &m[1], .size = SHA256_SIZE }, + }; + + for (slot = 1; slot <= REM_COUNT; slot++) { + for (m_idx = 0; m_idx < 3; m_idx++) { + memcpy(m[0].words, &measure_bytes[m_idx * 8], SHA256_SIZE); + memcpy(m[1].words, &measure_bytes[24 + m_idx * 8], SHA256_SIZE); + on_cpus(cpu_run_extend_measurement, (void *)&cpus[0]); + if (cpus[0].rc || cpus[1].rc) + return; + } + } + + /* Get the token and parse the claims */ + memset(page_buf_data, 0, sizeof(page_buf_data)); + memset(&ch, 0xAB, sizeof(ch)); + if (!get_attest_token_claims(page_buf_data, &ch, &claims, &token_size)) + return; + + /* + * Hard-coded test data expects sha-256 algorithm, skip the measurement + * value comparison if realm hash algo is different. + */ + if (!claims_uses_sha256_algo(&claims)) { + report_skip("Hash algo is different than sha-256," + " skip measurement value comparison"); + return; + } + + for (slot = 0; slot < REM_COUNT; slot++) { + struct claim_t *claim = &claims.realm_measurement_claims[slot]; + const char *data = claim->buffer_data.ptr; + const size_t len = claim->buffer_data.len; + + if (len != SHA256_SIZE) { + report(false, "Realm measurement size mismatch " + "%zu vs %d (expected)", len, SHA256_SIZE); + continue; + } + + for (m_idx = 0; m_idx < ARRAY_SIZE(expected); m_idx++) { + struct extend_smp_expected *em = &expected[m_idx]; + + if (memcmp(data, em->measurement, SHA256_SIZE) == 0) { + report(true, "Hash found for slot %d: %s", + slot, em->sequence); + break; + } + } + + if (m_idx == ARRAY_SIZE(expected)) + report(false, "Measurement doesn't match any expected " + "sequence for slot %d", slot); + } +} + +static void run_rsi_extend_smp_tests(void) +{ + report_prefix_push("extend_smp"); + test_rsi_extend_smp(); + report_prefix_pop(); +} + +static void test_rsi_extend_and_attest(void) +{ + struct challenge ch; + struct measurement m; + struct attestation_claims claims; + size_t token_size; + int i, j; + + char measure_bytes[] = { + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, /*slot 1*/ + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, /*slot 2*/ + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, /*slot 3*/ + 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, /*slot 4*/ + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /*slot 5*/ + 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, /*slot 6*/ + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, + 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 + }; + + /* The following expectations assume extending with SHA256 */ + char expected_measurements[][SHA256_SIZE] = { + { + 0x88, 0x78, 0xb1, 0x5a, 0x7d, 0x6a, 0x3a, 0x4f, + 0x46, 0x4e, 0x8f, 0x9f, 0x42, 0x59, 0x1d, 0xbc, + 0x0c, 0xf4, 0xbe, 0xde, 0xa0, 0xec, 0x30, 0x90, + 0x03, 0xd2, 0xb2, 0xee, 0x53, 0x65, 0x5e, 0xf8 + }, + { + 0x58, 0x32, 0x3b, 0xdf, 0x7a, 0x91, 0xf6, 0x8e, + 0x80, 0xc7, 0xc8, 0x7f, 0xda, 0x1e, 0x22, 0x6c, + 0x8b, 0xe7, 0xee, 0xa9, 0xef, 0x64, 0xa5, 0x21, + 0xdb, 0x2c, 0x09, 0xa7, 0xd7, 0x01, 0x92, 0x05 + }, + { + 0x66, 0xe3, 0x3b, 0x99, 0x49, 0x4d, 0xf4, 0xdd, + 0xbc, 0x7a, 0x61, 0x7a, 0xa1, 0x56, 0x7b, 0xf8, + 0x96, 0x3f, 0x0a, 0xf3, 0x1e, 0xab, 0xdd, 0x16, + 0x37, 0xb0, 0xfb, 0xe0, 0x71, 0x82, 0x66, 0xce + }, + { + 0x97, 0x5e, 0x9f, 0x64, 0x79, 0x90, 0xa1, 0x51, + 0xd2, 0x5b, 0x73, 0x75, 0x50, 0x94, 0xeb, 0x54, + 0x90, 0xbb, 0x1e, 0xf8, 0x3b, 0x2c, 0xb8, 0x3b, + 0x6f, 0x24, 0xf3, 0x86, 0x07, 0xe0, 0x58, 0x13 + }, + { + 0x68, 0x99, 0x86, 0x64, 0x9b, 0xeb, 0xa2, 0xe4, + 0x4d, 0x07, 0xbb, 0xb3, 0xa1, 0xd9, 0x2d, 0x07, + 0x76, 0x7f, 0x86, 0x19, 0xb8, 0x5f, 0x14, 0x48, + 0x1f, 0x38, 0x4b, 0x87, 0x51, 0xdc, 0x10, 0x31 + }, + { + 0xee, 0x8f, 0xb3, 0xe9, 0xc8, 0xa5, 0xbe, 0x4f, + 0x12, 0x90, 0x4a, 0x52, 0xb9, 0xc8, 0x62, 0xd1, + 0x8a, 0x44, 0x31, 0xf7, 0x56, 0x7d, 0x96, 0xda, + 0x97, 0x7a, 0x9e, 0x96, 0xae, 0x6a, 0x78, 0x43 + }, + }; + int times_to_extend[] = {1, 2, 3, 4, 5, 6}; + + memset(page_buf_data, 0, sizeof(page_buf_data)); + memset(&ch, 0xAB, sizeof(ch)); + if (!__get_attest_token_claims(page_buf_data, &ch, + &claims, &token_size, true)) + return; + + for (i = 0; i < REM_COUNT; i++) { + struct claim_t c = claims.realm_measurement_claims[i]; + for (j = 0; j < c.buffer_data.len; j++) { + if (((char *)c.buffer_data.ptr)[j]) + break; + } + } + + report((i == REM_COUNT), "Initial measurements must be 0"); + + /* Extend the possible measurements (i.e., 1 to REM_COUNT) */ + for (i = 1; i <= REM_COUNT; i++) { + memcpy(&m.words[0], &measure_bytes[(i - 1) * 8], SHA256_SIZE); + for (j = 0; j < times_to_extend[i - 1]; j++) { + struct smccc_result r; + + measurement_extend(i, &m, SHA256_SIZE, &r); + if (r.r0) { + report(false, "Extend measurment slot %d, iteration %d " + "failed with %ld", i, j, r.r0); + return; + } + } + } + report(true, "Extend measurement for all slots completed"); + + /* Get the attestation token again */ + if (!__get_attest_token_claims(page_buf_data, &ch, + &claims, &token_size, true)) + return; + + /* + * Hard-coded test data expects sha-256 algorithm, skip the measurement + * value comparison if realm hash algo is different. + */ + if (!claims_uses_sha256_algo(&claims)) + return; + + /* Verify the extended measurements */ + for (i = 0; i < REM_COUNT; i++) { + const char *exp = expected_measurements[i]; + const char *actual = claims.realm_measurement_claims[i].buffer_data.ptr; + const size_t len = claims.realm_measurement_claims[i].buffer_data.len; + + if (len != SHA256_SIZE) { + report(false, "Realm measurement: slot: %d, unexpected size " + "actual %ld vs %d expected", i, len, + SHA256_SIZE); + return; + } + if (memcmp(exp, actual, len)) { + report(false, "Measurement doesn't match for slot %d", i); + printf("Expected:\n"); + for (j = 0; j < len; j++) + printf("0x%2x ", exp[j]); + printf("\nActual:\n"); + for (j = 0; j < len; j++) + printf("0x%2x ", actual[j]); + printf("\n"); + } else { + report(true, "Extended measurement match expected for " + "slot %d", i); + + } + } +} + +static void run_rsi_extend_and_attest_tests(void) +{ + report_prefix_push("extend_and_attest"); + test_rsi_extend_and_attest(); + report_prefix_pop(); +} + +#define MEASUREMENT_MAX_SIZE_LONGS 8 + +static void test_read_measurement(void) +{ + struct smccc_result result; + return_code_t rc; + unsigned long *m; + int i, j; + + /* + * We must be able to read all measurements + * 0 (Initial read-only measurement and the + * realm extendable ones, 1 to REM_COUNT. + */ + for (i = 0; i <= REM_COUNT; i++) { + rsi_read_measurement(i, &result); + rc = unpack_return_code(result.r0); + if (rc.status) { + report(false, "Read measurement failed for slot %d with " + "(%d, %d)", i, rc.status, rc.index); + return; + } + m = &result.r1; + printf("Read measurement slot:%d, Hash = ", i); + for (j = 0; j < MEASUREMENT_MAX_SIZE_LONGS; j++) + printf("%lx", __builtin_bswap64(*m++)); + printf("\n"); + report(true, "Read Measurement Slot: %d", i); + } +} + +static void test_read_measurement_bad_input(void) +{ + struct smccc_result result; + return_code_t rc; + + report_prefix_push("out-of-range index"); + rsi_read_measurement(REM_COUNT + 1, &result); + rc = unpack_return_code(result.r0); + if (rc.status != RSI_ERROR_INPUT) { + report(false, "Read measurement fails, " + "expected (%d), got (%d)", + RSI_ERROR_INPUT, rc.status); + } else { + report(true, "Read measurement fails as expected"); + } + report_prefix_pop(); /* out-of-range index */ +} + +static void run_rsi_read_measurement_tests(void) +{ + report_prefix_push("measurement"); + test_read_measurement(); + test_read_measurement_bad_input(); + report_prefix_pop(); +} + +int main(int argc, char **argv) +{ + int i; + report_prefix_push("attestation"); + + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "attest") == 0) + run_rsi_attest_tests(); + else if (strcmp(argv[i], "attest_smp") == 0) + run_rsi_attest_smp_test(); + else if (strcmp(argv[i], "extend") == 0) + run_rsi_extend_tests(); + else if (strcmp(argv[i], "extend_smp") == 0) + run_rsi_extend_smp_tests(); + else if (strcmp(argv[i], "extend_and_attest") == 0) + run_rsi_extend_and_attest_tests(); + else if (strcmp(argv[i], "measurement") == 0) + run_rsi_read_measurement_tests(); + else + report_info("Unknown subtest '%s'", argv[i]); + } + return report_summary(); +} diff --git a/arm/unittests.cfg b/arm/unittests.cfg index bc2354c7..5e9e1cbd 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -311,3 +311,53 @@ file = realm-sea.flat groups = nodefault realms accel = kvm arch = arm64 + +# Realm Attestation realted tests +[realm-attest] +file = realm-attest.flat +groups = nodefault realms +smp = 1 +extra_params = -m 32 -append 'attest' +accel = kvm +arch = arm64 + +[realm-attest-smp] +file = realm-attest.flat +groups = nodefault realms +smp = 2 +extra_params = -m 32 -append 'attest_smp' +accel = kvm +arch = arm64 + +[realm-extend] +file = realm-attest.flat +groups = nodefault realms +smp = 1 +extra_params = -m 32 -append 'extend' +accel = kvm +arch = arm64 + +[realm-extend-smp] +file = realm-attest.flat +groups = nodefault realms +smp = 2 +extra_params = -m 32 -append 'extend_smp' +accel = kvm +arch = arm64 + +[realm-extend-and-attest] +file = realm-attest.flat +groups = nodefault realms +smp = 1 +extra_params = -m 32 -append 'extend_and_attest' +accel = kvm +arch = arm64 + + +[realm-measurement] +file = realm-attest.flat +groups = nodefault realms +smp = 1 +extra_params = -m 32 -append 'measurement' +accel = kvm +arch = arm64 diff --git a/lib/libcflat.h b/lib/libcflat.h index c1fd31ff..893fee6f 100644 --- a/lib/libcflat.h +++ b/lib/libcflat.h @@ -163,6 +163,7 @@ extern void setup_vm(void); #define SZ_64K (1 << 16) #define SZ_1M (1 << 20) #define SZ_2M (1 << 21) +#define SZ_512M (1 << 29) #define SZ_1G (1 << 30) #define SZ_2G (1ul << 31) -- 2.17.1