函数源码 |
Source File:security\keys\trusted-keys\trusted_tpm1.c |
Create Date:2022-07-27 20:04:34 |
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394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 | /* * Create an object specific authorisation protocol (OSAP) session */static int osap(struct tpm_buf *tb, struct osapsess *s, const unsigned char *key, uint16_t type, uint32_t handle){ unsigned char enonce[TPM_NONCE_SIZE]; unsigned char ononce[TPM_NONCE_SIZE]; int ret; ret = tpm_get_random(chip, ononce, TPM_NONCE_SIZE); if (ret != TPM_NONCE_SIZE) return ret; tpm_buf_reset(tb, TPM_TAG_RQU_COMMAND, TPM_ORD_OSAP); tpm_buf_append_u16(tb, type); tpm_buf_append_u32(tb, handle); tpm_buf_append(tb, ononce, TPM_NONCE_SIZE); ret = trusted_tpm_send(tb->data, MAX_BUF_SIZE); if (ret < 0) return ret; s->handle = LOAD32(tb->data, TPM_DATA_OFFSET); memcpy(s->enonce, &(tb->data[TPM_DATA_OFFSET + sizeof(uint32_t)]), TPM_NONCE_SIZE); memcpy(enonce, &(tb->data[TPM_DATA_OFFSET + sizeof(uint32_t) + TPM_NONCE_SIZE]), TPM_NONCE_SIZE); return TSS_rawhmac(s->secret, key, SHA1_DIGEST_SIZE, TPM_NONCE_SIZE, enonce, TPM_NONCE_SIZE, ononce, 0, 0);} |