| Tamas Ban | fb6237e | 2023-06-06 13:41:14 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2024, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #ifndef DICE_PROTECTION_ENVIRONMENT_H |
| 9 | #define DICE_PROTECTION_ENVIRONMENT_H |
| 10 | |
| 11 | #include <stdbool.h> |
| 12 | #include <stddef.h> |
| 13 | #include <stdint.h> |
| 14 | |
| 15 | #include <dice.h> |
| 16 | |
| 17 | /* Additional defines for max size limit. These limits are set by DPE in RSS. */ |
| 18 | #define DICE_AUTHORITY_DESCRIPTOR_MAX_SIZE 64 |
| 19 | #define DICE_CONFIG_DESCRIPTOR_MAX_SIZE 64 |
| 20 | #define DICE_CODE_DESCRIPTOR_MAX_SIZE 32 |
| 21 | |
| 22 | typedef int32_t dpe_error_t; |
| 23 | |
| 24 | #define DPE_NO_ERROR ((dpe_error_t)0) |
| 25 | #define DPE_INTERNAL_ERROR ((dpe_error_t)1) |
| 26 | #define DPE_INVALID_COMMAND ((dpe_error_t)2) |
| 27 | #define DPE_INVALID_ARGUMENT ((dpe_error_t)3) |
| 28 | #define DPE_ARGUMENT_NOT_SUPPORTED ((dpe_error_t)4) |
| 29 | #define DPE_SESSION_EXHAUSTED ((dpe_error_t)5) |
| 30 | |
| 31 | /* Custom values in RSS based DPE implementation */ |
| 32 | #define DPE_INSUFFICIENT_MEMORY ((dpe_error_t)128) |
| 33 | #define DPE_ERR_CBOR_FORMATTING ((dpe_error_t)129) |
| 34 | |
| 35 | /** |
| 36 | * Client facing API. Parameters are according to the DPE spec version r0.9 |
| 37 | * |
| 38 | * \brief Performs the DICE computation to derive a new context and optionally |
| 39 | * creates an intermediate certificate. Software component measurement |
| 40 | * must be provided in dice_inputs. |
| 41 | * |
| 42 | * \param[in] context_handle Input context handle for the DPE |
| 43 | * context. |
| 44 | * \param[in] retain_parent_context Flag to indicate whether to retain the |
| 45 | * parent context. True only if a client |
| 46 | * will call further DPE commands on the |
| 47 | * same context. |
| 48 | * \param[in] allow_new_context_to_derive Flag to indicate whether derived context |
| 49 | * can derive further. True only if the |
| 50 | * new context will load further components. |
| 51 | * \param[in] create_certificate Flag to indicate whether to create an |
| 52 | * intermediate certificate. True only if |
| 53 | * it is the last component in the layer. |
| 54 | * \param[in] dice_inputs DICE input values. |
| 55 | * \param[in] target_locality Identifies the locality to which the |
| 56 | * derived context will be bound. Could be |
| 57 | * MHU id. |
| 58 | * \param[in] return_certificate Indicates whether to return the generated |
| 59 | * certificate when create_certificate is true. |
| 60 | * \param[in] allow_new_context_to_export Indicates whether the DPE permits export of |
| 61 | * the CDI from the newly derived context. |
| 62 | * \param[in] export_cdi Indicates whether to export derived CDI. |
| 63 | * \param[out] new_context_handle New handle for the derived context. |
| 64 | * \param[out] new_parent_context_handle New handle for the parent context. |
| 65 | * \param[out] new_certificate_buf If create_certificate and return_certificate |
| 66 | * are both true, this argument holds the new |
| 67 | * certificate generated for the new context |
| 68 | * \param[in] new_certificate_buf_size Size of the allocated buffer for |
| 69 | * new certificate. |
| 70 | * \param[out] new_certificate_actual_size Actual size of the new certificate. |
| 71 | * \param[out] exported_cdi_buf If export_cdi is true, this is the |
| 72 | * exported CDI value. |
| 73 | * \param[in] exported_cdi_buf_size Size of the allocated buffer for |
| 74 | * exported cdi. |
| 75 | * \param[out] exported_cdi_actual_size Actual size of the exported cdi. |
| 76 | * |
| 77 | * \return Returns error code of type dpe_error_t |
| 78 | */ |
| 79 | dpe_error_t dpe_derive_context(int context_handle, |
| 80 | bool retain_parent_context, |
| 81 | bool allow_new_context_to_derive, |
| 82 | bool create_certificate, |
| 83 | const DiceInputValues *dice_inputs, |
| 84 | int32_t target_locality, |
| 85 | bool return_certificate, |
| 86 | bool allow_new_context_to_export, |
| 87 | bool export_cdi, |
| 88 | int *new_context_handle, |
| 89 | int *new_parent_context_handle, |
| 90 | uint8_t *new_certificate_buf, |
| 91 | size_t new_certificate_buf_size, |
| 92 | size_t *new_certificate_actual_size, |
| 93 | uint8_t *exported_cdi_buf, |
| 94 | size_t exported_cdi_buf_size, |
| 95 | size_t *exported_cdi_actual_size); |
| 96 | |
| 97 | #endif /* DICE_PROTECTION_ENVIRONMENT_H */ |