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/********************************************************************************/
/* */
/* Backwards compatibility stuff related to OBJECT */
/* Written by Stefan Berger */
/* IBM Thomas J. Watson Research Center */
/* */
/* (c) Copyright IBM Corporation 2017,2018. */
/* */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions are */
/* met: */
/* */
/* Redistributions of source code must retain the above copyright notice, */
/* this list of conditions and the following disclaimer. */
/* */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* */
/* Neither the names of the IBM Corporation nor the names of its */
/* contributors may be used to endorse or promote products derived from */
/* this software without specific prior written permission. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS */
/* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT */
/* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR */
/* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT */
/* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, */
/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
/* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, */
/* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY */
/* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE */
/* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/********************************************************************************/
#include <assert.h>
#include "BackwardsCompatibilityObject.h"
#ifndef static_assert
#define static_assert(test, msg)
#endif
/* The following are data structure from libtpms 0.7.x with RSA 2048 support
* that help to resume key and hash contexts (TPM2_ContextSave/Load) from this
* earlier version. All structures that have different sizes in 0.8 are found
* here.
*/
typedef union {
struct {
UINT16 size;
BYTE buffer[2048/8];
} t;
TPM2B b;
} OLD_TPM2B_PUBLIC_KEY_RSA;
typedef union {
TPM2B_DIGEST keyedHash;
TPM2B_DIGEST sym;
OLD_TPM2B_PUBLIC_KEY_RSA rsa;
TPMS_ECC_POINT ecc;
// TPMS_DERIVE derive;
} OLD_TPMU_PUBLIC_ID;
typedef struct {
TPMI_ALG_PUBLIC type;
TPMI_ALG_HASH nameAlg;
TPMA_OBJECT objectAttributes;
TPM2B_DIGEST authPolicy;
TPMU_PUBLIC_PARMS parameters;
OLD_TPMU_PUBLIC_ID unique;
} OLD_TPMT_PUBLIC;
static_assert(sizeof(OLD_TPMT_PUBLIC) == 356,
"OLD_TPMT_PUBLIC has wrong size");
typedef union {
struct {
UINT16 size;
BYTE buffer[((2048/8)/2)*5];
} t;
TPM2B b;
} OLD_TPM2B_PRIVATE_KEY_RSA;
static_assert(sizeof(OLD_TPM2B_PRIVATE_KEY_RSA) == 642,
"OLD_TPM2B_PRIVATE_KEY_RSA has wrong size");
typedef union {
struct {
UINT16 size;
BYTE buffer[((2048/8)/2)*5];
} t;
TPM2B b;
} OLD_TPM2B_PRIVATE_VENDOR_SPECIFIC;
typedef union {
OLD_TPM2B_PRIVATE_KEY_RSA rsa;
TPM2B_ECC_PARAMETER ecc;
TPM2B_SENSITIVE_DATA bits;
TPM2B_SYM_KEY sym;
OLD_TPM2B_PRIVATE_VENDOR_SPECIFIC any;
} OLD_TPMU_SENSITIVE_COMPOSITE;
typedef struct {
TPMI_ALG_PUBLIC sensitiveType;
TPM2B_AUTH authValue;
TPM2B_DIGEST seedValue;
OLD_TPMU_SENSITIVE_COMPOSITE sensitive;
} OLD_TPMT_SENSITIVE;
static_assert(sizeof(OLD_TPMT_SENSITIVE) == 776,
"OLD_TPMT_SENSITIVE has wrong size");
BN_TYPE(old_prime, (2048 / 2));
typedef struct OLD_privateExponent
{
bn_old_prime_t Q;
bn_old_prime_t dP;
bn_old_prime_t dQ;
bn_old_prime_t qInv;
} OLD_privateExponent_t;
static inline void CopyFromOldPrimeT(bn_prime_t *dst,
const bn_old_prime_t *src)
{
dst->allocated = src->allocated;
dst->size = src->size;
memcpy(dst->d, src->d, sizeof(src->d));
}
static_assert(sizeof(OLD_privateExponent_t) == 608,
"OLD_privateExponent_t has wrong size");
typedef struct OLD_OBJECT
{
// The attributes field is required to be first followed by the publicArea.
// This allows the overlay of the object structure and a sequence structure
OBJECT_ATTRIBUTES attributes; // object attributes
OLD_TPMT_PUBLIC publicArea; // public area of an object
OLD_TPMT_SENSITIVE sensitive; // sensitive area of an object
OLD_privateExponent_t privateExponent; // Additional field for the private
TPM2B_NAME qualifiedName; // object qualified name
TPMI_DH_OBJECT evictHandle; // if the object is an evict object,
// the original handle is kept here.
// The 'working' handle will be the
// handle of an object slot.
TPM2B_NAME name; // Name of the object name. Kept here
// to avoid repeatedly computing it.
// libtpms added: OBJECT lies in NVRAM; to avoid that it needs different number
// of bytes on 32 bit and 64 bit architectures, we need to make sure it's the
// same size; simple padding at the end works here
UINT32 _pad;
} OLD_OBJECT;
static_assert(sizeof(OLD_OBJECT) == 1896,
"OLD_OBJECT has wrong size");
// Convert an OLD_OBJECT that was copied into buffer using MemoryCopy
TPM_RC
OLD_OBJECTToOBJECT(OBJECT *newObject, BYTE *buffer, INT32 size)
{
OLD_OBJECT oldObject;
TPM_RC rc = 0;
// get the attributes
MemoryCopy(newObject, buffer, sizeof(newObject->attributes));
if (ObjectIsSequence(newObject))
{
/* resuming old hash contexts is not supported */
rc = TPM_RC_DISABLED;
}
else
{
if (size != sizeof(OLD_OBJECT))
return TPM_RC_SIZE;
MemoryCopy(&oldObject, buffer, sizeof(OLD_OBJECT));
/* fill the newObject with the contents of the oldObject */
newObject->attributes = oldObject.attributes;
newObject->publicArea.type = oldObject.publicArea.type;
newObject->publicArea.nameAlg = oldObject.publicArea.nameAlg;
newObject->publicArea.objectAttributes = oldObject.publicArea.objectAttributes;
newObject->publicArea.authPolicy = oldObject.publicArea.authPolicy;
newObject->publicArea.parameters = oldObject.publicArea.parameters;
/* the unique part can be one or two TPM2B's */
switch (newObject->publicArea.type) {
case TPM_ALG_KEYEDHASH:
MemoryCopy2B(&newObject->publicArea.unique.keyedHash.b,
&oldObject.publicArea.unique.keyedHash.b,
sizeof(oldObject.publicArea.unique.keyedHash.t.buffer));
break;
case TPM_ALG_SYMCIPHER:
MemoryCopy2B(&newObject->publicArea.unique.sym.b,
&oldObject.publicArea.unique.sym.b,
sizeof(oldObject.publicArea.unique.sym.t.buffer));
break;
case TPM_ALG_RSA:
MemoryCopy2B(&newObject->publicArea.unique.rsa.b,
&oldObject.publicArea.unique.rsa.b,
sizeof(oldObject.publicArea.unique.rsa.t.buffer));
break;
case TPM_ALG_ECC:
MemoryCopy2B(&newObject->publicArea.unique.ecc.x.b,
&oldObject.publicArea.unique.ecc.x.b,
sizeof(oldObject.publicArea.unique.ecc.x.t.buffer));
MemoryCopy2B(&newObject->publicArea.unique.ecc.y.b,
&oldObject.publicArea.unique.ecc.y.b,
sizeof(oldObject.publicArea.unique.ecc.y.t.buffer));
break;
}
newObject->sensitive.sensitiveType = oldObject.sensitive.sensitiveType;
newObject->sensitive.authValue = oldObject.sensitive.authValue;
newObject->sensitive.seedValue = oldObject.sensitive.seedValue;
/* The OLD_TPMU_SENSITIVE_COMPOSITE is always a TPM2B */
MemoryCopy2B(&newObject->sensitive.sensitive.any.b,
&oldObject.sensitive.sensitive.any.b,
sizeof(oldObject.sensitive.sensitive.any.t.buffer));
CopyFromOldPrimeT(&newObject->privateExponent.Q, &oldObject.privateExponent.Q);
CopyFromOldPrimeT(&newObject->privateExponent.dP, &oldObject.privateExponent.dP);
CopyFromOldPrimeT(&newObject->privateExponent.dQ, &oldObject.privateExponent.dQ);
CopyFromOldPrimeT(&newObject->privateExponent.qInv, &oldObject.privateExponent.qInv);
newObject->qualifiedName = oldObject.qualifiedName;
newObject->evictHandle = oldObject.evictHandle;
newObject->name = oldObject.name;
}
return rc;
}
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