| Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 1 | // This file was extracted from the TCG Published |
| 2 | // Trusted Platform Module Library |
| 3 | // Part 4: Supporting Routines |
| 4 | // Family "2.0" |
| 5 | // Level 00 Revision 01.16 |
| 6 | // October 30, 2014 |
| 7 | |
| 8 | #include "Tpm.h" |
| 9 | #include "InternalRoutines.h" |
| 10 | // |
| 11 | // |
| 12 | // Functions |
| 13 | // |
| 14 | // HandleGetType() |
| 15 | // |
| 16 | // This function returns the type of a handle which is the MSO of the handle. |
| 17 | // |
| 18 | TPM_HT |
| 19 | HandleGetType( |
| 20 | TPM_HANDLE handle // IN: a handle to be checked |
| 21 | ) |
| 22 | { |
| 23 | // return the upper bytes of input data |
| 24 | return (TPM_HT) ((handle & HR_RANGE_MASK) >> HR_SHIFT); |
| 25 | } |
| 26 | // |
| 27 | // |
| 28 | // NextPermanentHandle() |
| 29 | // |
| 30 | // This function returns the permanent handle that is equal to the input value or is the next higher value. If |
| 31 | // there is no handle with the input value and there is no next higher value, it returns 0: |
| 32 | // |
| 33 | // Return Value Meaning |
| 34 | // |
| 35 | TPM_HANDLE |
| 36 | NextPermanentHandle( |
| 37 | TPM_HANDLE inHandle // IN: the handle to check |
| 38 | ) |
| 39 | { |
| 40 | // If inHandle is below the start of the range of permanent handles |
| 41 | // set it to the start and scan from there |
| 42 | if(inHandle < TPM_RH_FIRST) |
| 43 | inHandle = TPM_RH_FIRST; |
| 44 | // scan from input value untill we find an implemented permanent handle |
| 45 | // or go out of range |
| 46 | for(; inHandle <= TPM_RH_LAST; inHandle++) |
| 47 | { |
| 48 | switch (inHandle) |
| 49 | { |
| 50 | case TPM_RH_OWNER: |
| 51 | case TPM_RH_NULL: |
| 52 | case TPM_RS_PW: |
| 53 | case TPM_RH_LOCKOUT: |
| 54 | case TPM_RH_ENDORSEMENT: |
| 55 | case TPM_RH_PLATFORM: |
| 56 | case TPM_RH_PLATFORM_NV: |
| 57 | #ifdef VENDOR_PERMANENT |
| 58 | case VENDOR_PERMANENT: |
| 59 | #endif |
| 60 | return inHandle; |
| 61 | break; |
| 62 | default: |
| 63 | break; |
| 64 | } |
| 65 | } |
| 66 | // Out of range on the top |
| 67 | return 0; |
| 68 | } |
| 69 | // |
| 70 | // |
| 71 | // PermanentCapGetHandles() |
| 72 | // |
| 73 | // This function returns a list of the permanent handles of PCR, started from handle. If handle is larger than |
| 74 | // the largest permanent handle, an empty list will be returned with more set to NO. |
| 75 | // |
| 76 | // Return Value Meaning |
| 77 | // |
| 78 | // YES if there are more handles available |
| 79 | // NO all the available handles has been returned |
| 80 | // |
| 81 | TPMI_YES_NO |
| 82 | PermanentCapGetHandles( |
| 83 | TPM_HANDLE handle, // IN: start handle |
| 84 | UINT32 count, // IN: count of returned handle |
| 85 | TPML_HANDLE *handleList // OUT: list of handle |
| 86 | ) |
| 87 | { |
| 88 | TPMI_YES_NO more = NO; |
| 89 | UINT32 i; |
| 90 | pAssert(HandleGetType(handle) == TPM_HT_PERMANENT); |
| 91 | // Initialize output handle list |
| 92 | handleList->count = 0; |
| 93 | // The maximum count of handles we may return is MAX_CAP_HANDLES |
| 94 | if(count > MAX_CAP_HANDLES) count = MAX_CAP_HANDLES; |
| 95 | // Iterate permanent handle range |
| 96 | for(i = NextPermanentHandle(handle); |
| 97 | i != 0; i = NextPermanentHandle(i+1)) |
| 98 | { |
| 99 | if(handleList->count < count) |
| 100 | { |
| 101 | // If we have not filled up the return list, add this permanent |
| 102 | // handle to it |
| 103 | handleList->handle[handleList->count] = i; |
| 104 | handleList->count++; |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | // If the return list is full but we still have permanent handle |
| 109 | // available, report this and stop iterating |
| 110 | more = YES; |
| 111 | break; |
| 112 | } |
| 113 | } |
| 114 | return more; |
| 115 | } |