| Lucian Paul-Trifu | 3519afe | 2022-03-08 15:02:31 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2021 Arm Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | #ifndef TPM_H |
| 8 | #define TPM_H |
| 9 | |
| 10 | #include <lib/utils_def.h> |
| 11 | |
| 12 | /* |
| 13 | * TPM_ALG_ID constants. |
| 14 | * Ref. Table 9 - Definition of (UINT16) TPM_ALG_ID Constants |
| 15 | * Trusted Platform Module Library. Part 2: Structures, |
| 16 | * Family "2.0", Level 00 Revision 01.38, September 29 2016. |
| 17 | */ |
| 18 | enum tpm_hash_alg { |
| 19 | TPM_ALG_NONE = 0x0, |
| 20 | TPM_ALG_SHA256 = 0x000B, |
| 21 | TPM_ALG_SHA384 = 0x000C, |
| 22 | TPM_ALG_SHA512 = 0x000D, |
| 23 | }; |
| 24 | static inline bool tpm_alg_is_valid(enum tpm_hash_alg alg) |
| 25 | { |
| 26 | switch (alg) { |
| 27 | case TPM_ALG_SHA256: |
| 28 | case TPM_ALG_SHA384: |
| 29 | case TPM_ALG_SHA512: |
| 30 | return true; |
| 31 | |
| 32 | default: |
| 33 | return false; |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | enum tpm_hash_alg_dsize { |
| 38 | TPM_ALG_SHA256_DSIZE = 32, |
| 39 | TPM_ALG_SHA384_DSIZE = 48, |
| 40 | TPM_ALG_SHA512_DSIZE = 64, |
| 41 | |
| 42 | TPM_ALG_MAX_DSIZE = TPM_ALG_SHA512_DSIZE |
| 43 | }; |
| 44 | static inline size_t tpm_alg_dsize(enum tpm_hash_alg alg) |
| 45 | { |
| 46 | switch (alg) { |
| 47 | case TPM_ALG_SHA256: |
| 48 | return TPM_ALG_SHA256_DSIZE; |
| 49 | |
| 50 | case TPM_ALG_SHA384: |
| 51 | return TPM_ALG_SHA384_DSIZE; |
| 52 | |
| 53 | case TPM_ALG_SHA512: |
| 54 | return TPM_ALG_SHA512_DSIZE; |
| 55 | |
| 56 | default: |
| 57 | return 0; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | enum tpm_pcr_idx { |
| 62 | /* |
| 63 | * SRTM, BIOS, Host Platform Extensions, Embedded |
| 64 | * Option ROMs and PI Drivers |
| 65 | */ |
| 66 | TPM_PCR_0 = 0, |
| 67 | /* Host Platform Configuration */ |
| 68 | TPM_PCR_1, |
| 69 | /* UEFI driver and application Code */ |
| 70 | TPM_PCR_2, |
| 71 | /* UEFI driver and application Configuration and Data */ |
| 72 | TPM_PCR_3, |
| 73 | /* UEFI Boot Manager Code (usually the MBR) and Boot Attempts */ |
| 74 | TPM_PCR_4, |
| 75 | /* |
| 76 | * Boot Manager Code Configuration and Data (for use |
| 77 | * by the Boot Manager Code) and GPT/Partition Table |
| 78 | */ |
| 79 | TPM_PCR_5, |
| 80 | /* Host Platform Manufacturer Specific */ |
| 81 | TPM_PCR_6, |
| 82 | /* Secure Boot Policy */ |
| 83 | TPM_PCR_7, |
| 84 | /* 8-15: Defined for use by the Static OS */ |
| 85 | TPM_PCR_8, |
| 86 | /* Debug */ |
| 87 | TPM_PCR_16 = 16, |
| 88 | |
| 89 | /* DRTM (1) */ |
| 90 | TPM_PCR_17 = 17, |
| 91 | /* DRTM (2) */ |
| 92 | TPM_PCR_18 = 18, |
| 93 | }; |
| 94 | static bool inline tpm_pcr_idx_is_valid(enum tpm_pcr_idx pcr_idx) |
| 95 | { |
| 96 | switch (pcr_idx) { |
| 97 | case TPM_PCR_0: |
| 98 | case TPM_PCR_1: |
| 99 | case TPM_PCR_2: |
| 100 | case TPM_PCR_3: |
| 101 | case TPM_PCR_4: |
| 102 | case TPM_PCR_5: |
| 103 | case TPM_PCR_6: |
| 104 | case TPM_PCR_7: |
| 105 | case TPM_PCR_8: |
| 106 | case TPM_PCR_16: |
| 107 | case TPM_PCR_17: |
| 108 | case TPM_PCR_18: |
| 109 | return true; |
| 110 | |
| 111 | default: |
| 112 | return false; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | #endif /* TPM_H */ |