diff options
Diffstat (limited to 'qemu/roms/u-boot/lib/tpm.c')
| -rw-r--r-- | qemu/roms/u-boot/lib/tpm.c | 914 |
1 files changed, 0 insertions, 914 deletions
diff --git a/qemu/roms/u-boot/lib/tpm.c b/qemu/roms/u-boot/lib/tpm.c deleted file mode 100644 index 967c8e651..000000000 --- a/qemu/roms/u-boot/lib/tpm.c +++ /dev/null @@ -1,914 +0,0 @@ -/* - * Copyright (c) 2013 The Chromium OS Authors. - * Coypright (c) 2013 Guntermann & Drunck GmbH - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <common.h> -#include <stdarg.h> -#include <sha1.h> -#include <tpm.h> -#include <asm/unaligned.h> - -/* Internal error of TPM command library */ -#define TPM_LIB_ERROR ((uint32_t)~0u) - -/* Useful constants */ -enum { - COMMAND_BUFFER_SIZE = 256, - TPM_PUBEK_SIZE = 256, - TPM_REQUEST_HEADER_LENGTH = 10, - TPM_RESPONSE_HEADER_LENGTH = 10, - PCR_DIGEST_LENGTH = 20, - DIGEST_LENGTH = 20, - TPM_REQUEST_AUTH_LENGTH = 45, - TPM_RESPONSE_AUTH_LENGTH = 41, - /* some max lengths, valid for RSA keys <= 2048 bits */ - TPM_KEY12_MAX_LENGTH = 618, - TPM_PUBKEY_MAX_LENGTH = 288, -}; - -#ifdef CONFIG_TPM_AUTH_SESSIONS - -#ifndef CONFIG_SHA1 -#error "TPM_AUTH_SESSIONS require SHA1 to be configured, too" -#endif /* !CONFIG_SHA1 */ - -struct session_data { - int valid; - uint32_t handle; - uint8_t nonce_even[DIGEST_LENGTH]; - uint8_t nonce_odd[DIGEST_LENGTH]; -}; - -static struct session_data oiap_session = {0, }; - -#endif /* CONFIG_TPM_AUTH_SESSIONS */ - -/** - * Pack data into a byte string. The data types are specified in - * the format string: 'b' means unsigned byte, 'w' unsigned word, - * 'd' unsigned double word, and 's' byte string. The data are a - * series of offsets and values (for type byte string there are also - * lengths). The data values are packed into the byte string - * sequentially, and so a latter value could over-write a former - * value. - * - * @param str output string - * @param size size of output string - * @param format format string - * @param ... data points - * @return 0 on success, non-0 on error - */ -int pack_byte_string(uint8_t *str, size_t size, const char *format, ...) -{ - va_list args; - size_t offset = 0, length = 0; - uint8_t *data = NULL; - uint32_t value = 0; - - va_start(args, format); - for (; *format; format++) { - switch (*format) { - case 'b': - offset = va_arg(args, size_t); - value = va_arg(args, int); - length = 1; - break; - case 'w': - offset = va_arg(args, size_t); - value = va_arg(args, int); - length = 2; - break; - case 'd': - offset = va_arg(args, size_t); - value = va_arg(args, uint32_t); - length = 4; - break; - case 's': - offset = va_arg(args, size_t); - data = va_arg(args, uint8_t *); - length = va_arg(args, uint32_t); - break; - default: - debug("Couldn't recognize format string\n"); - return -1; - } - - if (offset + length > size) - return -1; - - switch (*format) { - case 'b': - str[offset] = value; - break; - case 'w': - put_unaligned_be16(value, str + offset); - break; - case 'd': - put_unaligned_be32(value, str + offset); - break; - case 's': - memcpy(str + offset, data, length); - break; - } - } - va_end(args); - - return 0; -} - -/** - * Unpack data from a byte string. The data types are specified in - * the format string: 'b' means unsigned byte, 'w' unsigned word, - * 'd' unsigned double word, and 's' byte string. The data are a - * series of offsets and pointers (for type byte string there are also - * lengths). - * - * @param str output string - * @param size size of output string - * @param format format string - * @param ... data points - * @return 0 on success, non-0 on error - */ -int unpack_byte_string(const uint8_t *str, size_t size, const char *format, ...) -{ - va_list args; - size_t offset = 0, length = 0; - uint8_t *ptr8 = NULL; - uint16_t *ptr16 = NULL; - uint32_t *ptr32 = NULL; - - va_start(args, format); - for (; *format; format++) { - switch (*format) { - case 'b': - offset = va_arg(args, size_t); - ptr8 = va_arg(args, uint8_t *); - length = 1; - break; - case 'w': - offset = va_arg(args, size_t); - ptr16 = va_arg(args, uint16_t *); - length = 2; - break; - case 'd': - offset = va_arg(args, size_t); - ptr32 = va_arg(args, uint32_t *); - length = 4; - break; - case 's': - offset = va_arg(args, size_t); - ptr8 = va_arg(args, uint8_t *); - length = va_arg(args, uint32_t); - break; - default: - debug("Couldn't recognize format string\n"); - return -1; - } - - if (offset + length > size) - return -1; - - switch (*format) { - case 'b': - *ptr8 = str[offset]; - break; - case 'w': - *ptr16 = get_unaligned_be16(str + offset); - break; - case 'd': - *ptr32 = get_unaligned_be32(str + offset); - break; - case 's': - memcpy(ptr8, str + offset, length); - break; - } - } - va_end(args); - - return 0; -} - -/** - * Get TPM command size. - * - * @param command byte string of TPM command - * @return command size of the TPM command - */ -static uint32_t tpm_command_size(const void *command) -{ - const size_t command_size_offset = 2; - return get_unaligned_be32(command + command_size_offset); -} - -/** - * Get TPM response return code, which is one of TPM_RESULT values. - * - * @param response byte string of TPM response - * @return return code of the TPM response - */ -static uint32_t tpm_return_code(const void *response) -{ - const size_t return_code_offset = 6; - return get_unaligned_be32(response + return_code_offset); -} - -/** - * Send a TPM command and return response's return code, and optionally - * return response to caller. - * - * @param command byte string of TPM command - * @param response output buffer for TPM response, or NULL if the - * caller does not care about it - * @param size_ptr output buffer size (input parameter) and TPM - * response length (output parameter); this parameter - * is a bidirectional - * @return return code of the TPM response - */ -static uint32_t tpm_sendrecv_command(const void *command, - void *response, size_t *size_ptr) -{ - uint8_t response_buffer[COMMAND_BUFFER_SIZE]; - size_t response_length; - uint32_t err; - - if (response) { - response_length = *size_ptr; - } else { - response = response_buffer; - response_length = sizeof(response_buffer); - } - err = tis_sendrecv(command, tpm_command_size(command), - response, &response_length); - if (err) - return TPM_LIB_ERROR; - if (size_ptr) - *size_ptr = response_length; - - return tpm_return_code(response); -} - -uint32_t tpm_init(void) -{ - uint32_t err; - - err = tis_init(); - if (err) - return err; - - return tis_open(); -} - -uint32_t tpm_startup(enum tpm_startup_type mode) -{ - const uint8_t command[12] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x0, 0x0, 0x0, 0x99, 0x0, 0x0, - }; - const size_t mode_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE]; - - if (pack_byte_string(buf, sizeof(buf), "sw", - 0, command, sizeof(command), - mode_offset, mode)) - return TPM_LIB_ERROR; - - return tpm_sendrecv_command(buf, NULL, NULL); -} - -uint32_t tpm_self_test_full(void) -{ - const uint8_t command[10] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x50, - }; - return tpm_sendrecv_command(command, NULL, NULL); -} - -uint32_t tpm_continue_self_test(void) -{ - const uint8_t command[10] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x53, - }; - return tpm_sendrecv_command(command, NULL, NULL); -} - -uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size) -{ - const uint8_t command[101] = { - 0x0, 0xc1, /* TPM_TAG */ - 0x0, 0x0, 0x0, 0x65, /* parameter size */ - 0x0, 0x0, 0x0, 0xcc, /* TPM_COMMAND_CODE */ - /* TPM_NV_DATA_PUBLIC->... */ - 0x0, 0x18, /* ...->TPM_STRUCTURE_TAG */ - 0, 0, 0, 0, /* ...->TPM_NV_INDEX */ - /* TPM_NV_DATA_PUBLIC->TPM_PCR_INFO_SHORT */ - 0x0, 0x3, - 0, 0, 0, - 0x1f, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - /* TPM_NV_DATA_PUBLIC->TPM_PCR_INFO_SHORT */ - 0x0, 0x3, - 0, 0, 0, - 0x1f, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - /* TPM_NV_ATTRIBUTES->... */ - 0x0, 0x17, /* ...->TPM_STRUCTURE_TAG */ - 0, 0, 0, 0, /* ...->attributes */ - /* End of TPM_NV_ATTRIBUTES */ - 0, /* bReadSTClear */ - 0, /* bWriteSTClear */ - 0, /* bWriteDefine */ - 0, 0, 0, 0, /* size */ - }; - const size_t index_offset = 12; - const size_t perm_offset = 70; - const size_t size_offset = 77; - uint8_t buf[COMMAND_BUFFER_SIZE]; - - if (pack_byte_string(buf, sizeof(buf), "sddd", - 0, command, sizeof(command), - index_offset, index, - perm_offset, perm, - size_offset, size)) - return TPM_LIB_ERROR; - - return tpm_sendrecv_command(buf, NULL, NULL); -} - -uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count) -{ - const uint8_t command[22] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0xcf, - }; - const size_t index_offset = 10; - const size_t length_offset = 18; - const size_t data_size_offset = 10; - const size_t data_offset = 14; - uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t data_size; - uint32_t err; - - if (pack_byte_string(buf, sizeof(buf), "sdd", - 0, command, sizeof(command), - index_offset, index, - length_offset, count)) - return TPM_LIB_ERROR; - err = tpm_sendrecv_command(buf, response, &response_length); - if (err) - return err; - if (unpack_byte_string(response, response_length, "d", - data_size_offset, &data_size)) - return TPM_LIB_ERROR; - if (data_size > count) - return TPM_LIB_ERROR; - if (unpack_byte_string(response, response_length, "s", - data_offset, data, data_size)) - return TPM_LIB_ERROR; - - return 0; -} - -uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length) -{ - const uint8_t command[256] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xcd, - }; - const size_t command_size_offset = 2; - const size_t index_offset = 10; - const size_t length_offset = 18; - const size_t data_offset = 22; - const size_t write_info_size = 12; - const uint32_t total_length = - TPM_REQUEST_HEADER_LENGTH + write_info_size + length; - uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t err; - - if (pack_byte_string(buf, sizeof(buf), "sddds", - 0, command, sizeof(command), - command_size_offset, total_length, - index_offset, index, - length_offset, length, - data_offset, data, length)) - return TPM_LIB_ERROR; - err = tpm_sendrecv_command(buf, response, &response_length); - if (err) - return err; - - return 0; -} - -uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest) -{ - const uint8_t command[34] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0x22, 0x0, 0x0, 0x0, 0x14, - }; - const size_t index_offset = 10; - const size_t in_digest_offset = 14; - const size_t out_digest_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE]; - uint8_t response[TPM_RESPONSE_HEADER_LENGTH + PCR_DIGEST_LENGTH]; - size_t response_length = sizeof(response); - uint32_t err; - - if (pack_byte_string(buf, sizeof(buf), "sds", - 0, command, sizeof(command), - index_offset, index, - in_digest_offset, in_digest, - PCR_DIGEST_LENGTH)) - return TPM_LIB_ERROR; - err = tpm_sendrecv_command(buf, response, &response_length); - if (err) - return err; - - if (unpack_byte_string(response, response_length, "s", - out_digest_offset, out_digest, - PCR_DIGEST_LENGTH)) - return TPM_LIB_ERROR; - - return 0; -} - -uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count) -{ - const uint8_t command[14] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x15, - }; - const size_t index_offset = 10; - const size_t out_digest_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t err; - - if (count < PCR_DIGEST_LENGTH) - return TPM_LIB_ERROR; - - if (pack_byte_string(buf, sizeof(buf), "sd", - 0, command, sizeof(command), - index_offset, index)) - return TPM_LIB_ERROR; - err = tpm_sendrecv_command(buf, response, &response_length); - if (err) - return err; - if (unpack_byte_string(response, response_length, "s", - out_digest_offset, data, PCR_DIGEST_LENGTH)) - return TPM_LIB_ERROR; - - return 0; -} - -uint32_t tpm_tsc_physical_presence(uint16_t presence) -{ - const uint8_t command[12] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x0, - }; - const size_t presence_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE]; - - if (pack_byte_string(buf, sizeof(buf), "sw", - 0, command, sizeof(command), - presence_offset, presence)) - return TPM_LIB_ERROR; - - return tpm_sendrecv_command(buf, NULL, NULL); -} - -uint32_t tpm_read_pubek(void *data, size_t count) -{ - const uint8_t command[30] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0x1e, 0x0, 0x0, 0x0, 0x7c, - }; - const size_t response_size_offset = 2; - const size_t data_offset = 10; - const size_t header_and_checksum_size = TPM_RESPONSE_HEADER_LENGTH + 20; - uint8_t response[COMMAND_BUFFER_SIZE + TPM_PUBEK_SIZE]; - size_t response_length = sizeof(response); - uint32_t data_size; - uint32_t err; - - err = tpm_sendrecv_command(command, response, &response_length); - if (err) - return err; - if (unpack_byte_string(response, response_length, "d", - response_size_offset, &data_size)) - return TPM_LIB_ERROR; - if (data_size < header_and_checksum_size) - return TPM_LIB_ERROR; - data_size -= header_and_checksum_size; - if (data_size > count) - return TPM_LIB_ERROR; - if (unpack_byte_string(response, response_length, "s", - data_offset, data, data_size)) - return TPM_LIB_ERROR; - - return 0; -} - -uint32_t tpm_force_clear(void) -{ - const uint8_t command[10] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x5d, - }; - - return tpm_sendrecv_command(command, NULL, NULL); -} - -uint32_t tpm_physical_enable(void) -{ - const uint8_t command[10] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x6f, - }; - - return tpm_sendrecv_command(command, NULL, NULL); -} - -uint32_t tpm_physical_disable(void) -{ - const uint8_t command[10] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x70, - }; - - return tpm_sendrecv_command(command, NULL, NULL); -} - -uint32_t tpm_physical_set_deactivated(uint8_t state) -{ - const uint8_t command[11] = { - 0x0, 0xc1, 0x0, 0x0, 0x0, 0xb, 0x0, 0x0, 0x0, 0x72, - }; - const size_t state_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE]; - - if (pack_byte_string(buf, sizeof(buf), "sb", - 0, command, sizeof(command), - state_offset, state)) - return TPM_LIB_ERROR; - - return tpm_sendrecv_command(buf, NULL, NULL); -} - -uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap, - void *cap, size_t count) -{ - const uint8_t command[22] = { - 0x0, 0xc1, /* TPM_TAG */ - 0x0, 0x0, 0x0, 0x16, /* parameter size */ - 0x0, 0x0, 0x0, 0x65, /* TPM_COMMAND_CODE */ - 0x0, 0x0, 0x0, 0x0, /* TPM_CAPABILITY_AREA */ - 0x0, 0x0, 0x0, 0x4, /* subcap size */ - 0x0, 0x0, 0x0, 0x0, /* subcap value */ - }; - const size_t cap_area_offset = 10; - const size_t sub_cap_offset = 18; - const size_t cap_offset = 14; - const size_t cap_size_offset = 10; - uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t cap_size; - uint32_t err; - - if (pack_byte_string(buf, sizeof(buf), "sdd", - 0, command, sizeof(command), - cap_area_offset, cap_area, - sub_cap_offset, sub_cap)) - return TPM_LIB_ERROR; - err = tpm_sendrecv_command(buf, response, &response_length); - if (err) - return err; - if (unpack_byte_string(response, response_length, "d", - cap_size_offset, &cap_size)) - return TPM_LIB_ERROR; - if (cap_size > response_length || cap_size > count) - return TPM_LIB_ERROR; - if (unpack_byte_string(response, response_length, "s", - cap_offset, cap, cap_size)) - return TPM_LIB_ERROR; - - return 0; -} - -#ifdef CONFIG_TPM_AUTH_SESSIONS - -/** - * Fill an authentication block in a request. - * This func can create the first as well as the second auth block (for - * double authorized commands). - * - * @param request pointer to the request (w/ uninitialised auth data) - * @param request_len0 length of the request without auth data - * @param handles_len length of the handles area in request - * @param auth_session pointer to the (valid) auth session to be used - * @param request_auth pointer to the auth block of the request to be filled - * @param auth authentication data (HMAC key) - */ -static uint32_t create_request_auth(const void *request, size_t request_len0, - size_t handles_len, - struct session_data *auth_session, - void *request_auth, const void *auth) -{ - uint8_t hmac_data[DIGEST_LENGTH * 3 + 1]; - sha1_context hash_ctx; - const size_t command_code_offset = 6; - const size_t auth_nonce_odd_offset = 4; - const size_t auth_continue_offset = 24; - const size_t auth_auth_offset = 25; - - if (!auth_session || !auth_session->valid) - return TPM_LIB_ERROR; - - sha1_starts(&hash_ctx); - sha1_update(&hash_ctx, request + command_code_offset, 4); - if (request_len0 > TPM_REQUEST_HEADER_LENGTH + handles_len) - sha1_update(&hash_ctx, - request + TPM_REQUEST_HEADER_LENGTH + handles_len, - request_len0 - TPM_REQUEST_HEADER_LENGTH - - handles_len); - sha1_finish(&hash_ctx, hmac_data); - - sha1_starts(&hash_ctx); - sha1_update(&hash_ctx, auth_session->nonce_odd, DIGEST_LENGTH); - sha1_update(&hash_ctx, hmac_data, sizeof(hmac_data)); - sha1_finish(&hash_ctx, auth_session->nonce_odd); - - if (pack_byte_string(request_auth, TPM_REQUEST_AUTH_LENGTH, "dsb", - 0, auth_session->handle, - auth_nonce_odd_offset, auth_session->nonce_odd, - DIGEST_LENGTH, - auth_continue_offset, 1)) - return TPM_LIB_ERROR; - if (pack_byte_string(hmac_data, sizeof(hmac_data), "ss", - DIGEST_LENGTH, - auth_session->nonce_even, - DIGEST_LENGTH, - 2 * DIGEST_LENGTH, - request_auth + auth_nonce_odd_offset, - DIGEST_LENGTH + 1)) - return TPM_LIB_ERROR; - sha1_hmac(auth, DIGEST_LENGTH, hmac_data, sizeof(hmac_data), - request_auth + auth_auth_offset); - - return TPM_SUCCESS; -} - -/** - * Verify an authentication block in a response. - * Since this func updates the nonce_even in the session data it has to be - * called when receiving a succesfull AUTH response. - * This func can verify the first as well as the second auth block (for - * double authorized commands). - * - * @param command_code command code of the request - * @param response pointer to the request (w/ uninitialised auth data) - * @param handles_len length of the handles area in response - * @param auth_session pointer to the (valid) auth session to be used - * @param response_auth pointer to the auth block of the response to be verified - * @param auth authentication data (HMAC key) - */ -static uint32_t verify_response_auth(uint32_t command_code, - const void *response, size_t response_len0, - size_t handles_len, - struct session_data *auth_session, - const void *response_auth, const void *auth) -{ - uint8_t hmac_data[DIGEST_LENGTH * 3 + 1]; - uint8_t computed_auth[DIGEST_LENGTH]; - sha1_context hash_ctx; - const size_t return_code_offset = 6; - const size_t auth_continue_offset = 20; - const size_t auth_auth_offset = 21; - uint8_t auth_continue; - - if (!auth_session || !auth_session->valid) - return TPM_AUTHFAIL; - if (pack_byte_string(hmac_data, sizeof(hmac_data), "d", - 0, command_code)) - return TPM_LIB_ERROR; - if (response_len0 < TPM_RESPONSE_HEADER_LENGTH) - return TPM_LIB_ERROR; - - sha1_starts(&hash_ctx); - sha1_update(&hash_ctx, response + return_code_offset, 4); - sha1_update(&hash_ctx, hmac_data, 4); - if (response_len0 > TPM_RESPONSE_HEADER_LENGTH + handles_len) - sha1_update(&hash_ctx, - response + TPM_RESPONSE_HEADER_LENGTH + handles_len, - response_len0 - TPM_RESPONSE_HEADER_LENGTH - - handles_len); - sha1_finish(&hash_ctx, hmac_data); - - memcpy(auth_session->nonce_even, response_auth, DIGEST_LENGTH); - auth_continue = ((uint8_t *)response_auth)[auth_continue_offset]; - if (pack_byte_string(hmac_data, sizeof(hmac_data), "ssb", - DIGEST_LENGTH, - response_auth, - DIGEST_LENGTH, - 2 * DIGEST_LENGTH, - auth_session->nonce_odd, - DIGEST_LENGTH, - 3 * DIGEST_LENGTH, - auth_continue)) - return TPM_LIB_ERROR; - - sha1_hmac(auth, DIGEST_LENGTH, hmac_data, sizeof(hmac_data), - computed_auth); - - if (memcmp(computed_auth, response_auth + auth_auth_offset, - DIGEST_LENGTH)) - return TPM_AUTHFAIL; - - return TPM_SUCCESS; -} - - -uint32_t tpm_terminate_auth_session(uint32_t auth_handle) -{ - const uint8_t command[18] = { - 0x00, 0xc1, /* TPM_TAG */ - 0x00, 0x00, 0x00, 0x00, /* parameter size */ - 0x00, 0x00, 0x00, 0xba, /* TPM_COMMAND_CODE */ - 0x00, 0x00, 0x00, 0x00, /* TPM_HANDLE */ - 0x00, 0x00, 0x00, 0x02, /* TPM_RESSOURCE_TYPE */ - }; - const size_t req_handle_offset = TPM_REQUEST_HEADER_LENGTH; - uint8_t request[COMMAND_BUFFER_SIZE]; - - if (pack_byte_string(request, sizeof(request), "sd", - 0, command, sizeof(command), - req_handle_offset, auth_handle)) - return TPM_LIB_ERROR; - if (oiap_session.valid && oiap_session.handle == auth_handle) - oiap_session.valid = 0; - - return tpm_sendrecv_command(request, NULL, NULL); -} - -uint32_t tpm_end_oiap(void) -{ - uint32_t err = TPM_SUCCESS; - if (oiap_session.valid) - err = tpm_terminate_auth_session(oiap_session.handle); - return err; -} - -uint32_t tpm_oiap(uint32_t *auth_handle) -{ - const uint8_t command[10] = { - 0x00, 0xc1, /* TPM_TAG */ - 0x00, 0x00, 0x00, 0x0a, /* parameter size */ - 0x00, 0x00, 0x00, 0x0a, /* TPM_COMMAND_CODE */ - }; - const size_t res_auth_handle_offset = TPM_RESPONSE_HEADER_LENGTH; - const size_t res_nonce_even_offset = TPM_RESPONSE_HEADER_LENGTH + 4; - uint8_t response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t err; - - if (oiap_session.valid) - tpm_terminate_auth_session(oiap_session.handle); - - err = tpm_sendrecv_command(command, response, &response_length); - if (err) - return err; - if (unpack_byte_string(response, response_length, "ds", - res_auth_handle_offset, &oiap_session.handle, - res_nonce_even_offset, &oiap_session.nonce_even, - (uint32_t)DIGEST_LENGTH)) - return TPM_LIB_ERROR; - oiap_session.valid = 1; - if (auth_handle) - *auth_handle = oiap_session.handle; - return 0; -} - -uint32_t tpm_load_key2_oiap(uint32_t parent_handle, - const void *key, size_t key_length, - const void *parent_key_usage_auth, - uint32_t *key_handle) -{ - const uint8_t command[14] = { - 0x00, 0xc2, /* TPM_TAG */ - 0x00, 0x00, 0x00, 0x00, /* parameter size */ - 0x00, 0x00, 0x00, 0x41, /* TPM_COMMAND_CODE */ - 0x00, 0x00, 0x00, 0x00, /* parent handle */ - }; - const size_t req_size_offset = 2; - const size_t req_parent_handle_offset = TPM_REQUEST_HEADER_LENGTH; - const size_t req_key_offset = TPM_REQUEST_HEADER_LENGTH + 4; - const size_t res_handle_offset = TPM_RESPONSE_HEADER_LENGTH; - uint8_t request[sizeof(command) + TPM_KEY12_MAX_LENGTH - + TPM_REQUEST_AUTH_LENGTH]; - uint8_t response[COMMAND_BUFFER_SIZE]; - size_t response_length = sizeof(response); - uint32_t err; - - if (!oiap_session.valid) { - err = tpm_oiap(NULL); - if (err) - return err; - } - if (pack_byte_string(request, sizeof(request), "sdds", - 0, command, sizeof(command), - req_size_offset, - sizeof(command) + key_length - + TPM_REQUEST_AUTH_LENGTH, - req_parent_handle_offset, parent_handle, - req_key_offset, key, key_length - )) - return TPM_LIB_ERROR; - - err = create_request_auth(request, sizeof(command) + key_length, 4, - &oiap_session, - request + sizeof(command) + key_length, - parent_key_usage_auth); - if (err) - return err; - err = tpm_sendrecv_command(request, response, &response_length); - if (err) { - if (err == TPM_AUTHFAIL) - oiap_session.valid = 0; - return err; - } - - err = verify_response_auth(0x00000041, response, - response_length - TPM_RESPONSE_AUTH_LENGTH, - 4, &oiap_session, - response + response_length - TPM_RESPONSE_AUTH_LENGTH, - parent_key_usage_auth); - if (err) - return err; - - if (key_handle) { - if (unpack_byte_string(response, response_length, "d", - res_handle_offset, key_handle)) - return TPM_LIB_ERROR; - } - - return 0; -} - -uint32_t tpm_get_pub_key_oiap(uint32_t key_handle, const void *usage_auth, - void *pubkey, size_t *pubkey_len) -{ - const uint8_t command[14] = { - 0x00, 0xc2, /* TPM_TAG */ - 0x00, 0x00, 0x00, 0x00, /* parameter size */ - 0x00, 0x00, 0x00, 0x21, /* TPM_COMMAND_CODE */ - 0x00, 0x00, 0x00, 0x00, /* key handle */ - }; - const size_t req_size_offset = 2; - const size_t req_key_handle_offset = TPM_REQUEST_HEADER_LENGTH; - const size_t res_pubkey_offset = TPM_RESPONSE_HEADER_LENGTH; - uint8_t request[sizeof(command) + TPM_REQUEST_AUTH_LENGTH]; - uint8_t response[TPM_RESPONSE_HEADER_LENGTH + TPM_PUBKEY_MAX_LENGTH - + TPM_RESPONSE_AUTH_LENGTH]; - size_t response_length = sizeof(response); - uint32_t err; - - if (!oiap_session.valid) { - err = tpm_oiap(NULL); - if (err) - return err; - } - if (pack_byte_string(request, sizeof(request), "sdd", - 0, command, sizeof(command), - req_size_offset, - (uint32_t)(sizeof(command) - + TPM_REQUEST_AUTH_LENGTH), - req_key_handle_offset, key_handle - )) - return TPM_LIB_ERROR; - err = create_request_auth(request, sizeof(command), 4, &oiap_session, - request + sizeof(command), usage_auth); - if (err) - return err; - err = tpm_sendrecv_command(request, response, &response_length); - if (err) { - if (err == TPM_AUTHFAIL) - oiap_session.valid = 0; - return err; - } - err = verify_response_auth(0x00000021, response, - response_length - TPM_RESPONSE_AUTH_LENGTH, - 0, &oiap_session, - response + response_length - TPM_RESPONSE_AUTH_LENGTH, - usage_auth); - if (err) - return err; - - if (pubkey) { - if ((response_length - TPM_RESPONSE_HEADER_LENGTH - - TPM_RESPONSE_AUTH_LENGTH) > *pubkey_len) - return TPM_LIB_ERROR; - *pubkey_len = response_length - TPM_RESPONSE_HEADER_LENGTH - - TPM_RESPONSE_AUTH_LENGTH; - memcpy(pubkey, response + res_pubkey_offset, - response_length - TPM_RESPONSE_HEADER_LENGTH - - TPM_RESPONSE_AUTH_LENGTH); - } - - return 0; -} - -#endif /* CONFIG_TPM_AUTH_SESSIONS */ |