| 1 | #include <stdlib.h>
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| 2 | #include <stdio.h>
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| 3 | #include <string.h>
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| 4 | #include <unistd.h>
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| 5 | #include <assert.h>
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| 6 |
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| 7 | #include <libtpms/tpm_types.h>
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| 8 | #include <libtpms/tpm_library.h>
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| 9 | #include <libtpms/tpm_error.h>
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| 10 | #include <libtpms/tpm_memory.h>
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| 11 | #include <libtpms/tpm_nvfilename.h>
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| 12 |
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| 13 |
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| 14 | static void die(const char *msg)
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| 15 | {
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| 16 | fprintf(stderr, "%s", msg);
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| 17 | assert(false);
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| 18 | }
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| 19 |
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| 20 | static TPM_RESULT mytpm_io_init(void)
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| 21 | {
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| 22 | return TPM_SUCCESS;
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| 23 | }
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| 24 |
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| 25 | static TPM_RESULT mytpm_io_getlocality(TPM_MODIFIER_INDICATOR *locModif,
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| 26 | uint32_t tpm_number)
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| 27 | {
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| 28 | *locModif = 0;
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| 29 |
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| 30 | return TPM_SUCCESS;
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| 31 | }
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| 32 |
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| 33 | static TPM_RESULT mytpm_io_getphysicalpresence(TPM_BOOL *phyPres,
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| 34 | uint32_t tpm_number)
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| 35 | {
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| 36 | *phyPres = FALSE;
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| 37 |
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| 38 | return TPM_SUCCESS;
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| 39 | }
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| 40 |
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| 41 | static unsigned char *permall;
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| 42 | static uint32_t permall_length;
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| 43 |
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| 44 | static TPM_RESULT mytpm_nvram_loaddata(unsigned char **data,
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| 45 | uint32_t *length,
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| 46 | uint32_t tpm_number,
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| 47 | const char *name)
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| 48 | {
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| 49 | if (!strcmp(name, TPM_PERMANENT_ALL_NAME)) {
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| 50 | if (permall) {
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| 51 | *data = NULL;
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| 52 | assert(TPM_Malloc(data, permall_length) == TPM_SUCCESS);
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| 53 | memcpy(*data, permall, permall_length);
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| 54 | *length = permall_length;
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| 55 | return TPM_SUCCESS;
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| 56 | }
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| 57 | }
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| 58 | return TPM_RETRY;
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| 59 | }
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| 60 |
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| 61 | static TPM_RESULT mytpm_nvram_storedata(const unsigned char *data,
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| 62 | uint32_t length,
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| 63 | uint32_t tpm_number,
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| 64 | const char *name)
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| 65 | {
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| 66 | if (!strcmp(name, TPM_PERMANENT_ALL_NAME)) {
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| 67 | free(permall);
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| 68 | permall = NULL;
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| 69 | assert(TPM_Malloc(&permall, length) == TPM_SUCCESS);
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| 70 | memcpy(permall, data, length);
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| 71 | permall_length = length;
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| 72 | }
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| 73 | return TPM_SUCCESS;
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| 74 | }
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| 75 |
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| 76 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
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| 77 | {
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| 78 | unsigned char *rbuffer = NULL;
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| 79 | uint32_t rlength;
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| 80 | uint32_t rtotal = 0;
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| 81 | TPM_RESULT res;
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| 82 | unsigned char *vol_buffer = NULL;
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| 83 | uint32_t vol_buffer_len;
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| 84 | unsigned char *perm_buffer = NULL;
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| 85 | uint32_t perm_buffer_len;
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| 86 | unsigned char startup[] = {
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| 87 | 0x80, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x01, 0x44, 0x00, 0x00
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| 88 | };
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| 89 | struct libtpms_callbacks cbs = {
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| 90 | .sizeOfStruct = sizeof(struct libtpms_callbacks),
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| 91 | .tpm_nvram_init = NULL,
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| 92 | .tpm_nvram_loaddata = mytpm_nvram_loaddata,
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| 93 | .tpm_nvram_storedata = mytpm_nvram_storedata,
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| 94 | .tpm_nvram_deletename = NULL,
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| 95 | .tpm_io_init = mytpm_io_init,
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| 96 | .tpm_io_getlocality = mytpm_io_getlocality,
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| 97 | .tpm_io_getphysicalpresence = mytpm_io_getphysicalpresence,
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| 98 | };
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| 99 | res = TPMLIB_RegisterCallbacks(&cbs);
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| 100 | if (res != TPM_SUCCESS)
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| 101 | die("Could not register callbacks\n");
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| 102 |
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| 103 | res = TPMLIB_ChooseTPMVersion(TPMLIB_TPM_VERSION_2);
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| 104 | if (res != TPM_SUCCESS)
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| 105 | die("Could not choose the TPM version\n");
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| 106 |
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| 107 | res = TPMLIB_MainInit();
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| 108 | if (res != TPM_SUCCESS)
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| 109 | die("Error: TPMLIB_MainInit() failed\n");
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| 110 |
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| 111 | res = TPMLIB_Process(&rbuffer, &rlength, &rtotal, startup, sizeof(startup));
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| 112 | if (res != TPM_SUCCESS)
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| 113 | die("Error: TPMLIB_Process(Startup) failed\n");
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| 114 |
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| 115 | res = TPMLIB_Process(&rbuffer, &rlength, &rtotal, (unsigned char*)data, size);
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| 116 | if (res != TPM_SUCCESS)
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| 117 | die("Error: TPMLIB_Process(fuzz-command) failed\n");
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| 118 |
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| 119 | /* state suspend */
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| 120 | res = TPMLIB_GetState(TPMLIB_STATE_VOLATILE, &vol_buffer, &vol_buffer_len);
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| 121 | if (res != TPM_SUCCESS)
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| 122 | die("Error: TPMLIB_GetState(TPMLIB_STATE_VOLATILE) failed\n");
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| 123 |
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| 124 | res = TPMLIB_GetState(TPMLIB_STATE_PERMANENT, &perm_buffer, &perm_buffer_len);
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| 125 | if (res != TPM_SUCCESS)
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| 126 | die("Error: TPMLIB_GetState(TPMLIB_STATE_PERMANENT) failed\n");
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| 127 |
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| 128 | TPMLIB_Terminate();
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| 129 |
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| 130 | /* state resume */
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| 131 | res = TPMLIB_SetState(TPMLIB_STATE_PERMANENT, perm_buffer, perm_buffer_len);
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| 132 | if (res != TPM_SUCCESS)
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| 133 | die("Error: TPMLIB_SetState(TPMLIB_STATE_PERMANENT) failed\n");
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| 134 |
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| 135 | res = TPMLIB_SetState(TPMLIB_STATE_VOLATILE, vol_buffer, vol_buffer_len);
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| 136 | if (res != TPM_SUCCESS)
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| 137 | die("Error: TPMLIB_SetState(TPMLIB_STATE_VOLATILE) failed\n");
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| 138 |
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| 139 | res = TPMLIB_MainInit();
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| 140 | if (res != TPM_SUCCESS)
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| 141 | die("Error: TPMLIB_MainInit() to resume with the state failed\n");
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| 142 |
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| 143 | TPMLIB_Terminate();
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| 144 | TPM_Free(rbuffer);
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| 145 | TPM_Free(vol_buffer);
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| 146 | TPM_Free(perm_buffer);
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| 147 | TPM_Free(permall);
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| 148 | permall = NULL;
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| 149 |
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| 150 | return 0;
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| 151 | }
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