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tpm2: Add function to display USER_NVRAM contents

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Add a function for displaying the USER_NVRAM contents for debugging.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
This commit is contained in:
Stefan Berger 2018-07-17 09:50:04 -04:00
parent dbc07c190c
commit 3ed7491323
1 changed files with 65 additions and 0 deletions
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65
src/tpm2/NVMarshal.c
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@ -4085,6 +4085,65 @@ exit_size:
return TPM_RC_SIZE;
}
static void
USER_NVRAM_Display(const char *msg)
{
NV_REF entryRef = NV_USER_DYNAMIC;
UINT32 entrysize;
UINT64 offset = 0;
TPM_HANDLE handle;
UINT32 datasize;
NV_INDEX nvi;
OBJECT obj;
UINT64 maxCount;
fprintf(stderr, "USER_NVRAM contents %s:\n", msg);
while (TRUE) {
/* 1st: entrysize */
NvRead(&entrysize, entryRef, sizeof(entrysize));
fprintf(stderr, " offset: %5lu entry size: %5u ",
entryRef - NV_USER_DYNAMIC, entrysize);
offset = sizeof(UINT32);
if (entrysize == 0)
break;
/* 2nd: the handle -- it will tell us what datatype this is */
NvRead(&handle, entryRef + offset, sizeof(handle));
fprintf(stderr, "handle: 0x%08x ", handle);
switch (HandleGetType(handle)) {
case TPM_HT_NV_INDEX:
fprintf(stderr, " (NV_INDEX) ");
/* NV_INDEX has the index again at offset 0! */
NvReadNvIndexInfo(entryRef + offset, &nvi);
offset += sizeof(nvi);
datasize = entrysize - sizeof(UINT32) - sizeof(nvi);
fprintf(stderr, " datasize: %u\n",datasize);
break;
break;
case TPM_HT_PERSISTENT:
fprintf(stderr, " (PERSISTENT)");
offset += sizeof(handle);
NvRead(&obj, entryRef + offset, sizeof(obj));
offset += sizeof(obj);
fprintf(stderr, " sizeof(obj): %zu\n", sizeof(obj));
break;
default:
TPMLIB_LogTPM2Error("USER NVRAM: Corrupted handle: %08x\n", handle);
}
/* advance to next entry */
entryRef += entrysize;
}
fprintf(stderr, "\n");
NvRead(&maxCount, entryRef + offset, sizeof(maxCount));
fprintf(stderr, " maxCount: %ld\n", maxCount);
fprintf(stderr, "-----------------------------\n");
}
#define USER_NVRAM_VERSION 2
#define USER_NVRAM_MAGIC 0x094f22c3
UINT32
@ -4102,6 +4161,9 @@ USER_NVRAM_Marshal(BYTE **buffer, INT32 *size)
UINT64 sourceside_size = NV_USER_DYNAMIC_END - NV_USER_DYNAMIC;
BLOCK_SKIP_INIT;
if (FALSE)
USER_NVRAM_Display("before marshalling");
written = NV_HEADER_Marshal(buffer, size,
USER_NVRAM_VERSION, USER_NVRAM_MAGIC,
1);
@ -4303,6 +4365,9 @@ USER_NVRAM_Unmarshal(BYTE **buffer, INT32 *size)
skip_future_versions:
if (FALSE)
USER_NVRAM_Display("after unmarshalling");
return rc;
exit_size: