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/* Copyright 2019 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Stuff from tpm2 directory. */
#define HIDE_EC_STDLIB
#define NV_C
#include "Global.h"
#undef NV_C
#include "NV_fp.h"
#include "tpm_generated.h"
#include "nvmem.h"
#include "util.h"
#define NVMEM_CR50_SIZE 272
#ifndef TEST_FUZZ
uint32_t nvmem_user_sizes[NVMEM_NUM_USERS] = {MOCK_NV_MEMORY_SIZE,
NVMEM_CR50_SIZE};
#endif
uint32_t s_evictNvStart;
uint32_t s_evictNvEnd;
/* Calculate size of TPM NVMEM. */
#define MOCK_NV_MEMORY_SIZE \
(NVMEM_PARTITION_SIZE - sizeof(struct nvmem_tag) - NVMEM_CR50_SIZE)
/*
* Sizes of the reserved objects stored in the TPM NVMEM. Note that the second
* last object is in fact a variable size field starting with 4 bytes of size
* and then up to 512 bytes of actual index data. The array below assumes that
* the full 512 bytes of the index space are used.
*/
const uint16_t res_sizes[] = {4, 2, 2, 2, 66, 66, 66, 66, 66, 66,
34, 34, 34, 66, 66, 66, 8, 4, 134, 28,
3, 4, 4, 4, 4, 4, 2, 15, 2, 8,
4, 4, 4, 96, 2844, 424, 516, 8};
static uint16_t res_addrs[ARRAY_SIZE(res_sizes)];
UINT32 NvEarlyStageFindHandle(TPM_HANDLE handle)
{
size_t i;
res_addrs[0] = 0;
for (i = 1; i < ARRAY_SIZE(res_addrs); i++)
res_addrs[i] = res_addrs[i - 1] + res_sizes[i - 1];
s_evictNvStart = res_addrs[i - 1] + res_sizes[i - 1];
s_evictNvEnd = MOCK_NV_MEMORY_SIZE;
return 0;
}
void NvGetReserved(UINT32 index, NV_RESERVED_ITEM *ri)
{
if (index < ARRAY_SIZE(res_sizes)) {
ri->size = res_sizes[index];
ri->offset = res_addrs[index];
} else {
ri->size = 0;
}
}
UINT16 UINT16_Marshal(UINT16 *source, BYTE **buffer, INT32 *size)
{
uint16_t value;
if (!size || (*size < sizeof(value)))
return 0;
value = htobe16(*source);
memcpy(*buffer, &value, sizeof(value));
*buffer += sizeof(value);
*size -= sizeof(value);
return sizeof(value);
}
UINT16 UINT32_Marshal(UINT32 *source, BYTE **buffer, INT32 *size)
{
uint32_t value;
if (!size || (*size < sizeof(value)))
return 0;
value = htobe32(*source);
memcpy(*buffer, &value, sizeof(value));
*buffer += sizeof(value);
*size -= sizeof(value);
return sizeof(value);
}
UINT16 UINT64_Marshal(UINT64 *source, BYTE **buffer, INT32 *size)
{
uint64_t value;
if (!size || (*size < sizeof(value)))
return 0;
value = htobe64(*source);
memcpy(*buffer, &value, sizeof(value));
*buffer += sizeof(value);
*size -= sizeof(value);
return sizeof(value);
}
UINT16 TPM2B_DIGEST_Marshal(TPM2B_DIGEST *source, BYTE **buffer, INT32 *size)
{
UINT16 total_size;
INT32 i;
uint8_t *p;
total_size = UINT16_Marshal(&source->t.size, buffer, size);
p = *buffer;
for (i = 0; (i < source->t.size) && *size; ++i) {
*p++ = source->t.buffer[i];
*size -= 1;
}
total_size += i;
*buffer = p;
return total_size;
}
uint16_t TPM2B_AUTH_Marshal(TPM2B_AUTH *source, BYTE **buffer, INT32 *size)
{
return TPM2B_DIGEST_Marshal(source, buffer, size);
}
uint16_t TPM2B_NONCE_Marshal(TPM2B_AUTH *source, BYTE **buffer, INT32 *size)
{
return TPM2B_DIGEST_Marshal(source, buffer, size);
}
TPM_RC UINT16_Unmarshal(UINT16 *target, BYTE **buffer, INT32 *size)
{
uint16_t value;
if (!size || *size < sizeof(value))
return TPM_RC_INSUFFICIENT;
memcpy(&value, *buffer, sizeof(value));
*target = be16toh(value);
*buffer += sizeof(value);
*size -= sizeof(value);
return TPM_RC_SUCCESS;
}
TPM_RC UINT32_Unmarshal(UINT32 *target, BYTE **buffer, INT32 *size)
{
uint32_t value;
if (!size || *size < sizeof(value))
return TPM_RC_INSUFFICIENT;
memcpy(&value, *buffer, sizeof(value));
*target = be32toh(value);
*buffer += sizeof(value);
*size -= sizeof(value);
return TPM_RC_SUCCESS;
}
TPM_RC UINT64_Unmarshal(UINT64 *target, BYTE **buffer, INT32 *size)
{
uint64_t value;
if (!size || *size < sizeof(value))
return TPM_RC_INSUFFICIENT;
memcpy(&value, *buffer, sizeof(value));
*target = be64toh(value);
*buffer += sizeof(value);
*size -= sizeof(value);
return TPM_RC_SUCCESS;
}
TPM_RC TPM2B_DIGEST_Unmarshal(TPM2B_DIGEST *target, BYTE **buffer, INT32 *size)
{
TPM_RC result;
INT32 i;
uint8_t *p;
result = UINT16_Unmarshal(&target->t.size, buffer, size);
if (result != TPM_RC_SUCCESS)
return result;
if (target->t.size == 0)
return TPM_RC_SUCCESS;
if ((target->t.size > sizeof(TPMU_HA)) || (target->t.size > *size))
return TPM_RC_SIZE;
p = *buffer;
for (i = 0; i < target->t.size; ++i)
target->t.buffer[i] = *p++;
*buffer = p;
*size -= i;
return TPM_RC_SUCCESS;
}
TPM_RC TPM2B_AUTH_Unmarshal(TPM2B_AUTH *target, BYTE **buffer, INT32 *size)
{
return TPM2B_DIGEST_Unmarshal(target, buffer, size);
}
TPM_RC TPM2B_NONCE_Unmarshal(TPM2B_AUTH *target, BYTE **buffer, INT32 *size)
{
return TPM2B_DIGEST_Unmarshal(target, buffer, size);
}
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