diff options
Diffstat (limited to '')
| -rw-r--r-- | src/tpm2/Object.c | 970 |
1 files changed, 970 insertions, 0 deletions
diff --git a/src/tpm2/Object.c b/src/tpm2/Object.c new file mode 100644 index 0000000..aa69a53 --- /dev/null +++ b/src/tpm2/Object.c @@ -0,0 +1,970 @@ +/********************************************************************************/ +/* */ +/* Manage the object store of the TPM. */ +/* Written by Ken Goldman */ +/* IBM Thomas J. Watson Research Center */ +/* $Id: Object.c 1658 2021-01-22 23:14:01Z kgoldman $ */ +/* */ +/* Licenses and Notices */ +/* */ +/* 1. Copyright Licenses: */ +/* */ +/* - Trusted Computing Group (TCG) grants to the user of the source code in */ +/* this specification (the "Source Code") a worldwide, irrevocable, */ +/* nonexclusive, royalty free, copyright license to reproduce, create */ +/* derivative works, distribute, display and perform the Source Code and */ +/* derivative works thereof, and to grant others the rights granted herein. */ +/* */ +/* - The TCG grants to the user of the other parts of the specification */ +/* (other than the Source Code) the rights to reproduce, distribute, */ +/* display, and perform the specification solely for the purpose of */ +/* developing products based on such documents. */ +/* */ +/* 2. Source Code Distribution Conditions: */ +/* */ +/* - Redistributions of Source Code must retain the above copyright licenses, */ +/* this list of conditions and the following disclaimers. */ +/* */ +/* - Redistributions in binary form must reproduce the above copyright */ +/* licenses, this list of conditions and the following disclaimers in the */ +/* documentation and/or other materials provided with the distribution. */ +/* */ +/* 3. Disclaimers: */ +/* */ +/* - THE COPYRIGHT LICENSES SET FORTH ABOVE DO NOT REPRESENT ANY FORM OF */ +/* LICENSE OR WAIVER, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, WITH */ +/* RESPECT TO PATENT RIGHTS HELD BY TCG MEMBERS (OR OTHER THIRD PARTIES) */ +/* THAT MAY BE NECESSARY TO IMPLEMENT THIS SPECIFICATION OR OTHERWISE. */ +/* Contact TCG Administration (admin@trustedcomputinggroup.org) for */ +/* information on specification licensing rights available through TCG */ +/* membership agreements. */ +/* */ +/* - THIS SPECIFICATION IS PROVIDED "AS IS" WITH NO EXPRESS OR IMPLIED */ +/* WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR */ +/* FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS, OR */ +/* NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS, OR ANY WARRANTY */ +/* OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. */ +/* */ +/* - Without limitation, TCG and its members and licensors disclaim all */ +/* liability, including liability for infringement of any proprietary */ +/* rights, relating to use of information in this specification and to the */ +/* implementation of this specification, and TCG disclaims all liability for */ +/* cost of procurement of substitute goods or services, lost profits, loss */ +/* of use, loss of data or any incidental, consequential, direct, indirect, */ +/* or special damages, whether under contract, tort, warranty or otherwise, */ +/* arising in any way out of use or reliance upon this specification or any */ +/* information herein. */ +/* */ +/* (c) Copyright IBM Corp. and others, 2016 - 2021 */ +/* */ +/********************************************************************************/ + +/* 8.6 Object.c */ +/* 8.6.1 Introduction */ +/* This file contains the functions that manage the object store of the TPM. */ +/* 8.6.2 Includes and Data Definitions */ +#define OBJECT_C +#include "Tpm.h" +#include "NVMarshal.h" // libtpms added +#include "BackwardsCompatibilityObject.h" // libtpms added +/* 8.6.3 Functions */ +/* 8.6.3.1 ObjectFlush() */ +/* This function marks an object slot as available. Since there is no checking of the input + parameters, it should be used judiciously. */ +/* NOTE: This could be converted to a macro. */ +void +ObjectFlush( + OBJECT *object + ) +{ + object->attributes.occupied = CLEAR; +} +/* 8.6.3.2 ObjectSetInUse() */ +/* This access function sets the occupied attribute of an object slot. */ +void +ObjectSetInUse( + OBJECT *object + ) +{ + object->attributes.occupied = SET; +} +/* 8.6.3.3 ObjectStartup() */ +/* This function is called at TPM2_Startup() to initialize the object subsystem. */ +BOOL +ObjectStartup( + void + ) +{ + UINT32 i; + // object slots initialization + for(i = 0; i < MAX_LOADED_OBJECTS; i++) + { + //Set the slot to not occupied + ObjectFlush(&s_objects[i]); + } + return TRUE; +} +/* 8.6.3.4 ObjectCleanupEvict() */ +/* In this implementation, a persistent object is moved from NV into an object slot for + processing. It is flushed after command execution. This function is called from + ExecuteCommand(). */ +void +ObjectCleanupEvict( + void + ) +{ + UINT32 i; + // This has to be iterated because a command may have two handles + // and they may both be persistent. + // This could be made to be more efficient so that a search is not needed. + for(i = 0; i < MAX_LOADED_OBJECTS; i++) + { + // If an object is a temporary evict object, flush it from slot + OBJECT *object = &s_objects[i]; + if(object->attributes.evict == SET) + ObjectFlush(object); + } + return; +} +/* 8.6.3.5 IsObjectPresent() */ +/* This function checks to see if a transient handle references a loaded object. This routine + should not be called if the handle is not a transient handle. The function validates that the + handle is in the implementation-dependent allowed in range for loaded transient objects. */ +/* Return Values Meaning */ +/* TRUE if the handle references a loaded object */ +/* FALSE if the handle is not an object handle, or it does not reference to a loaded object */ +BOOL +IsObjectPresent( + TPMI_DH_OBJECT handle // IN: handle to be checked + ) +{ + UINT32 slotIndex = handle - TRANSIENT_FIRST; + // Since the handle is just an index into the array that is zero based, any + // handle value outsize of the range of: + // TRANSIENT_FIRST -- (TRANSIENT_FIRST + MAX_LOADED_OBJECT - 1) + // will now be greater than or equal to MAX_LOADED_OBJECTS + if(slotIndex >= MAX_LOADED_OBJECTS) + return FALSE; + // Indicate if the slot is occupied + return (s_objects[slotIndex].attributes.occupied == TRUE); +} +/* 8.6.3.6 ObjectIsSequence() */ +/* This function is used to check if the object is a sequence object. This function should not be + called if the handle does not reference a loaded object. */ +/* Return Values Meaning */ +/* TRUE object is an HMAC, hash, or event sequence object */ +/* FALSE object is not an HMAC, hash, or event sequence object */ +BOOL +ObjectIsSequence( + OBJECT *object // IN: handle to be checked + ) +{ + pAssert(object != NULL); + return (object->attributes.hmacSeq == SET + || object->attributes.hashSeq == SET + || object->attributes.eventSeq == SET); +} +/* 8.6.3.7 HandleToObject() */ +/* This function is used to find the object structure associated with a handle. */ +/* This function requires that handle references a loaded object or a permanent handle. */ +OBJECT* +HandleToObject( + TPMI_DH_OBJECT handle // IN: handle of the object + ) +{ + UINT32 index; + // Return NULL if the handle references a permanent handle because there is no + // associated OBJECT. + if(HandleGetType(handle) == TPM_HT_PERMANENT) + return NULL; + // In this implementation, the handle is determined by the slot occupied by the + // object. + index = handle - TRANSIENT_FIRST; + pAssert(index < MAX_LOADED_OBJECTS); + pAssert(s_objects[index].attributes.occupied); + return &s_objects[index]; +} +/* 8.6.3.9 GetQualifiedName() */ +/* This function returns the Qualified Name of the object. In this implementation, the Qualified + Name is computed when the object is loaded and is saved in the internal representation of the + object. The alternative would be to retain the Name of the parent and compute the QN when + needed. This would take the same amount of space so it is not recommended that the alternate be + used. */ +/* This function requires that handle references a loaded object. */ +void +GetQualifiedName( + TPMI_DH_OBJECT handle, // IN: handle of the object + TPM2B_NAME *qualifiedName // OUT: qualified name of the object + ) +{ + OBJECT *object; + switch(HandleGetType(handle)) + { + case TPM_HT_PERMANENT: + qualifiedName->t.size = sizeof(TPM_HANDLE); + UINT32_TO_BYTE_ARRAY(handle, qualifiedName->t.name); + break; + case TPM_HT_TRANSIENT: + object = HandleToObject(handle); + if(object == NULL || object->publicArea.nameAlg == TPM_ALG_NULL) + qualifiedName->t.size = 0; + else + // Copy the name + *qualifiedName = object->qualifiedName; + break; + default: + FAIL(FATAL_ERROR_INTERNAL); + } + return; +} +/* 8.6.3.10 ObjectGetHierarchy() */ +/* This function returns the handle for the hierarchy of an object. */ +TPMI_RH_HIERARCHY +ObjectGetHierarchy( + OBJECT *object // IN :object + ) +{ + if(object->attributes.spsHierarchy) + { + return TPM_RH_OWNER; + } + else if(object->attributes.epsHierarchy) + { + return TPM_RH_ENDORSEMENT; + } + else if(object->attributes.ppsHierarchy) + { + return TPM_RH_PLATFORM; + } + else + { + return TPM_RH_NULL; + } +} +/* 8.6.3.11 GetHierarchy() */ +/* This function returns the handle of the hierarchy to which a handle belongs. This function is + similar to ObjectGetHierarchy() but this routine takes a handle while ObjectGetHierarchy() takes + a pointer to an object. */ +/* This function requires that handle references a loaded object. */ +TPMI_RH_HIERARCHY +GetHieriarchy( + TPMI_DH_OBJECT handle // IN :object handle + ) +{ + OBJECT *object = HandleToObject(handle); + return ObjectGetHierarchy(object); +} +/* 8.6.3.12 FindEmptyObjectSlot() */ +/* This function finds an open object slot, if any. It will clear the attributes but will not set + the occupied attribute. This is so that a slot may be used and discarded if everything does not + go as planned. */ +/* Return Values Meaning */ +/* null no open slot found */ +/* !=null pointer to available slot */ +OBJECT * +FindEmptyObjectSlot( + TPMI_DH_OBJECT *handle // OUT: (optional) + ) +{ + UINT32 i; + OBJECT *object; + for(i = 0; i < MAX_LOADED_OBJECTS; i++) + { + object = &s_objects[i]; + if(object->attributes.occupied == CLEAR) + { + if(handle) + *handle = i + TRANSIENT_FIRST; + // Initialize the object attributes + // MemorySet(&object->attributes, 0, sizeof(OBJECT_ATTRIBUTES)); + MemorySet(object, 0, sizeof(*object)); // libtpms added: Initialize the whole object + return object; + } + } + return NULL; +} +/* 8.6.3.13 ObjectAllocateSlot() */ +/* This function is used to allocate a slot in internal object array. */ +/* Return Values Meaning */ +OBJECT * +ObjectAllocateSlot( + TPMI_DH_OBJECT *handle // OUT: handle of allocated object + ) +{ + OBJECT *object = FindEmptyObjectSlot(handle); + if(object != NULL) + { + // if found, mark as occupied + ObjectSetInUse(object); + } + return object; +} +/* 8.6.3.14 ObjectSetLoadedAttributes() */ +/* This function sets the internal attributes for a loaded object. It is called to finalize the + OBJECT attributes (not the TPMA_OBJECT attributes) for a loaded object. */ +void +ObjectSetLoadedAttributes( + OBJECT *object, // IN: object attributes to finalize + TPM_HANDLE parentHandle, // IN: the parent handle + SEED_COMPAT_LEVEL seedCompatLevel // IN: seed compat level to use for children + ) +{ + OBJECT *parent = HandleToObject(parentHandle); + TPMA_OBJECT objectAttributes = object->publicArea.objectAttributes; + + object->seedCompatLevel = seedCompatLevel; // libtpms added + // + // Copy the stClear attribute from the public area. This could be overwritten + // if the parent has stClear SET + object->attributes.stClear = + IS_ATTRIBUTE(objectAttributes, TPMA_OBJECT, stClear); + // If parent handle is a permanent handle, it is a primary (unless it is NULL + if(parent == NULL) + { + object->attributes.primary = SET; + switch(parentHandle) + { + case TPM_RH_ENDORSEMENT: + object->attributes.epsHierarchy = SET; + break; + case TPM_RH_OWNER: + object->attributes.spsHierarchy = SET; + break; + case TPM_RH_PLATFORM: + object->attributes.ppsHierarchy = SET; + break; + default: + // Treat the temporary attribute as a hierarchy + object->attributes.temporary = SET; + object->attributes.primary = CLEAR; + break; + } + } + else + { + // is this a stClear object + object->attributes.stClear = + (IS_ATTRIBUTE(objectAttributes, TPMA_OBJECT, stClear) + || (parent->attributes.stClear == SET)); + object->attributes.epsHierarchy = parent->attributes.epsHierarchy; + object->attributes.spsHierarchy = parent->attributes.spsHierarchy; + object->attributes.ppsHierarchy = parent->attributes.ppsHierarchy; + // An object is temporary if its parent is temporary or if the object + // is external + object->attributes.temporary = parent->attributes.temporary + || object->attributes.external; + } + // If this is an external object, set the QN == name but don't SET other + // key properties ('parent' or 'derived') + if(object->attributes.external) + object->qualifiedName = object->name; + else + { + // check attributes for different types of parents + if(IS_ATTRIBUTE(objectAttributes, TPMA_OBJECT, restricted) + && !object->attributes.publicOnly + && IS_ATTRIBUTE(objectAttributes, TPMA_OBJECT, decrypt) + && object->publicArea.nameAlg != TPM_ALG_NULL) + { + // This is a parent. If it is not a KEYEDHASH, it is an ordinary parent. + // Otherwise, it is a derivation parent. + if(object->publicArea.type == TPM_ALG_KEYEDHASH) + object->attributes.derivation = SET; + else + object->attributes.isParent = SET; + } + ComputeQualifiedName(parentHandle, object->publicArea.nameAlg, + &object->name, &object->qualifiedName); + } + // Set slot occupied + ObjectSetInUse(object); + return; +} +/* 8.6.3.15 ObjectLoad() */ +/* Common function to load an object. A loaded object has its public area validated (unless its + nameAlg is TPM_ALG_NULL). If a sensitive part is loaded, it is verified to be correct and if both + public and sensitive parts are loaded, then the cryptographic binding between the objects is + validated. This function does not cause the allocated slot to be marked as in use. */ +TPM_RC +ObjectLoad( + OBJECT *object, // IN: pointer to object slot + // object + OBJECT *parent, // IN: (optional) the parent object + TPMT_PUBLIC *publicArea, // IN: public area to be installed in the object + TPMT_SENSITIVE *sensitive, // IN: (optional) sensitive area to be + // installed in the object + TPM_RC blamePublic, // IN: parameter number to associate with the + // publicArea errors + TPM_RC blameSensitive,// IN: parameter number to associate with the + // sensitive area errors + TPM2B_NAME *name // IN: (optional) + ) +{ + TPM_RC result = TPM_RC_SUCCESS; + BOOL doCheck; + // + // Do validations of public area object descriptions + // Is this public only or a no-name object? + if(sensitive == NULL || publicArea->nameAlg == TPM_ALG_NULL) + { + // Need to have schemes checked so that we do the right thing with the + // public key. + result = SchemeChecks(NULL, publicArea); + } + else + { + // For any sensitive area, make sure that the seedSize is no larger than the + // digest size of nameAlg + if(sensitive->seedValue.t.size + > CryptHashGetDigestSize(publicArea->nameAlg)) + return TPM_RCS_KEY_SIZE + blameSensitive; + // Check attributes and schemes for consistency + result = PublicAttributesValidation(parent, publicArea); + } + if(result != TPM_RC_SUCCESS) + return RcSafeAddToResult(result, blamePublic); + // If object == NULL, then this is am import. For import, load is not called + // unless the parent is fixedTPM. + if(object == NULL) + doCheck = TRUE;// // + // If the parent is not NULL, then this is an ordinary load and we only check + // if the parent is not fixedTPM + else if(parent != NULL) + doCheck = !IS_ATTRIBUTE(parent->publicArea.objectAttributes, + TPMA_OBJECT, fixedTPM); + else + // This is a loadExternal. Check everything. + // Note: the check functions will filter things based on the name algorithm + // and whether or not both parts are loaded. + doCheck = TRUE; + // Note: the parent will be NULL if this is a load external. CryptValidateKeys() + // will only check the parts that need to be checked based on the settings + // of publicOnly and nameAlg. + // Note: For an RSA key, the keys sizes are checked but the binding is not + // checked. + if(doCheck) + { + // Do the cryptographic key validation + result = CryptValidateKeys(publicArea, sensitive, blamePublic, + blameSensitive); + } + // If this is an import, we are done + if(object == NULL || result != TPM_RC_SUCCESS) + return result; + // Set the name, if one was provided + if(name != NULL) + object->name = *name; + else + object->name.t.size = 0; + // Initialize public + object->publicArea = *publicArea; + // If there is a sensitive area, load it + if(sensitive == NULL) + object->attributes.publicOnly = SET; + else + { + object->sensitive = *sensitive; +#if ALG_RSA + // If this is an RSA key that is not a parent, complete the load by + // computing the private exponent. + if(publicArea->type == ALG_RSA_VALUE) + result = CryptRsaLoadPrivateExponent(object); +#endif + } + return result; +} +/* 8.6.3.16 AllocateSequenceSlot() */ +/* This function allocates a sequence slot and initializes the parts that are used by the normal + objects so that a sequence object is not inadvertently used for an operation that is not + appropriate for a sequence. */ +static HASH_OBJECT * +AllocateSequenceSlot( + TPM_HANDLE *newHandle, // OUT: receives the allocated handle + TPM2B_AUTH *auth // IN: the authValue for the slot + ) +{ + HASH_OBJECT *object = (HASH_OBJECT *)ObjectAllocateSlot(newHandle); + // + // Validate that the proper location of the hash state data relative to the + // object state data. It would be good if this could have been done at compile + // time but it can't so do it in something that can be removed after debug. + cAssert(offsetof(HASH_OBJECT, auth) == offsetof(OBJECT, publicArea.authPolicy)); + if(object != NULL) + { + // Set the common values that a sequence object shares with an ordinary object + // First, clear all attributes + MemorySet(&object->objectAttributes, 0, sizeof(TPMA_OBJECT)); + // The type is TPM_ALG_NULL + object->type = TPM_ALG_NULL; + // This has no name algorithm and the name is the Empty Buffer + object->nameAlg = TPM_ALG_NULL; + // A sequence object is considered to be in the NULL hierarchy so it should + // be marked as temporary so that it can't be persisted + object->attributes.temporary = SET; + // A sequence object is DA exempt. + SET_ATTRIBUTE(object->objectAttributes, TPMA_OBJECT, noDA); + // Copy the authorization value + if(auth != NULL) + object->auth = *auth; + else + object->auth.t.size = 0; + } + return object; +} +/* 8.6.3.17 ObjectCreateHMACSequence() */ +/* This function creates an internal HMAC sequence object. */ +/* Error Returns Meaning */ +/* TPM_RC_OBJECT_MEMORY if there is no free slot for an object */ +#if CC_HMAC_Start || CC_MAC_Start +TPM_RC +ObjectCreateHMACSequence( + TPMI_ALG_HASH hashAlg, // IN: hash algorithm + OBJECT *keyObject, // IN: the object containing the HMAC key + TPM2B_AUTH *auth, // IN: authValue + TPMI_DH_OBJECT *newHandle // OUT: HMAC sequence object handle + ) +{ + HASH_OBJECT *hmacObject; + // + // Try to allocate a slot for new object + hmacObject = AllocateSequenceSlot(newHandle, auth); + if(hmacObject == NULL) + return TPM_RC_OBJECT_MEMORY; + // Set HMAC sequence bit + hmacObject->attributes.hmacSeq = SET; +#if !SMAC_IMPLEMENTED + if(CryptHmacStart(&hmacObject->state.hmacState, hashAlg, + keyObject->sensitive.sensitive.bits.b.size, + keyObject->sensitive.sensitive.bits.b.buffer) == 0) +#else + if(CryptMacStart(&hmacObject->state.hmacState, + &keyObject->publicArea.parameters, + hashAlg, &keyObject->sensitive.sensitive.any.b) == 0) +#endif // SMAC_IMPLEMENTED + return TPM_RC_FAILURE; + return TPM_RC_SUCCESS; +} +#endif + +/* 8.6.3.18 ObjectCreateHashSequence() */ +/* This function creates a hash sequence object. */ +/* Error Returns Meaning */ +/* TPM_RC_OBJECT_MEMORY if there is no free slot for an object */ +TPM_RC +ObjectCreateHashSequence( + TPMI_ALG_HASH hashAlg, // IN: hash algorithm + TPM2B_AUTH *auth, // IN: authValue + TPMI_DH_OBJECT *newHandle // OUT: sequence object handle + ) +{ + HASH_OBJECT *hashObject = AllocateSequenceSlot(newHandle, auth); + // See if slot allocated + if(hashObject == NULL) + return TPM_RC_OBJECT_MEMORY; + // Set hash sequence bit + hashObject->attributes.hashSeq = SET; + // Start hash for hash sequence + CryptHashStart(&hashObject->state.hashState[0], hashAlg); + return TPM_RC_SUCCESS; +} +/* 8.6.3.19 ObjectCreateEventSequence() */ +/* This function creates an event sequence object. */ +/* Error Returns Meaning */ +/* TPM_RC_OBJECT_MEMORY if there is no free slot for an object */ +TPM_RC +ObjectCreateEventSequence( + TPM2B_AUTH *auth, // IN: authValue + TPMI_DH_OBJECT *newHandle // OUT: sequence object handle + ) +{ + HASH_OBJECT *hashObject = AllocateSequenceSlot(newHandle, auth); + UINT32 count; + TPM_ALG_ID hash; + // See if slot allocated + if(hashObject == NULL) + return TPM_RC_OBJECT_MEMORY; + // Set the event sequence attribute + hashObject->attributes.eventSeq = SET; + // Initialize hash states for each implemented PCR algorithms + for(count = 0; (hash = CryptHashGetAlgByIndex(count)) != TPM_ALG_NULL; count++) + CryptHashStart(&hashObject->state.hashState[count], hash); + return TPM_RC_SUCCESS; +} +/* 8.6.3.20 ObjectTerminateEvent() */ +/* This function is called to close out the event sequence and clean up the hash context states. */ +void +ObjectTerminateEvent( + void + ) +{ + HASH_OBJECT *hashObject; + int count; + BYTE buffer[MAX_DIGEST_SIZE]; + hashObject = (HASH_OBJECT *)HandleToObject(g_DRTMHandle); + // Don't assume that this is a proper sequence object + if(hashObject->attributes.eventSeq) + { + // If it is, close any open hash contexts. This is done in case + // the cryptographic implementation has some context values that need to be + // cleaned up (hygiene). + // + for(count = 0; CryptHashGetAlgByIndex(count) != TPM_ALG_NULL; count++) + { + CryptHashEnd(&hashObject->state.hashState[count], 0, buffer); + } + // Flush sequence object + FlushObject(g_DRTMHandle); + } + g_DRTMHandle = TPM_RH_UNASSIGNED; +} +/* 8.6.3.21 ObjectContextLoad() */ +/* This function loads an object from a saved object context. */ +/* Return Values Meaning */ +/* NULL if there is no free slot for an object */ +/* NON_NULL points to the loaded object */ +#if 0 // libtpms added +OBJECT * +ObjectContextLoad( + ANY_OBJECT_BUFFER *object, // IN: pointer to object structure in saved + // context + TPMI_DH_OBJECT *handle // OUT: object handle + ) +{ + OBJECT *newObject = ObjectAllocateSlot(handle); + // Try to allocate a slot for new object + if(newObject != NULL) + { + // Copy the first part of the object + MemoryCopy(newObject, object, offsetof(HASH_OBJECT, state)); + // See if this is a sequence object + if(ObjectIsSequence(newObject)) + { + // If this is a sequence object, import the data + SequenceDataImport((HASH_OBJECT *)newObject, + (HASH_OBJECT_BUFFER *)object); + } + else + { + // Copy input object data to internal structure + MemoryCopy(newObject, object, sizeof(OBJECT)); + } + } + return newObject; +} +#endif // libtpms added begin + +OBJECT * +ObjectContextLoadLibtpms(BYTE *buffer, + INT32 size, + TPMI_DH_OBJECT *handle + ) +{ + OBJECT *newObject = ObjectAllocateSlot(handle); + TPM_RC rc; + BYTE *mybuf = buffer; + INT32 mysize = size; + + pAssert(handle); + + // Try to allocate a slot for new object + if(newObject != NULL) + { + rc = ANY_OBJECT_Unmarshal(newObject, &mybuf, &mysize, false); + if (rc) { + /* Attempt to load an old OBJECT that was copied out directly from + * an older version of OBJECT. + */ + rc = OLD_OBJECTToOBJECT(newObject, buffer, size); + if (rc) { + FlushObject(*handle); + newObject = NULL; + } + } + } + return newObject; +} // libtpms added end + +/* 8.6.3.22 FlushObject() */ +/* This function frees an object slot. */ +/* This function requires that the object is loaded. */ +void +FlushObject( + TPMI_DH_OBJECT handle // IN: handle to be freed + ) +{ + UINT32 index = handle - TRANSIENT_FIRST; + pAssert(index < MAX_LOADED_OBJECTS); + // Clear all the object attributes + MemorySet((BYTE*)&(s_objects[index].attributes), + 0, sizeof(OBJECT_ATTRIBUTES)); + return; +} +/* 8.6.3.23 ObjectFlushHierarchy() */ +/* This function is called to flush all the loaded transient objects associated with a hierarchy + when the hierarchy is disabled. */ +void +ObjectFlushHierarchy( + TPMI_RH_HIERARCHY hierarchy // IN: hierarchy to be flush + ) +{ + UINT16 i; + // iterate object slots + for(i = 0; i < MAX_LOADED_OBJECTS; i++) + { + if(s_objects[i].attributes.occupied) // If found an occupied slot + { + switch(hierarchy) + { + case TPM_RH_PLATFORM: + if(s_objects[i].attributes.ppsHierarchy == SET) + s_objects[i].attributes.occupied = FALSE; + break; + case TPM_RH_OWNER: + if(s_objects[i].attributes.spsHierarchy == SET) + s_objects[i].attributes.occupied = FALSE; + break; + case TPM_RH_ENDORSEMENT: + if(s_objects[i].attributes.epsHierarchy == SET) + s_objects[i].attributes.occupied = FALSE; + break; + default: + FAIL(FATAL_ERROR_INTERNAL); + break; + } + } + } + return; +} +/* 8.6.3.24 ObjectLoadEvict() */ +/* This function loads a persistent object into a transient object slot. */ +/* This function requires that handle is associated with a persistent object. */ +/* Error Returns Meaning */ +/* TPM_RC_HANDLE the persistent object does not exist or the associated hierarchy is disabled. */ +/* TPM_RC_OBJECT_MEMORY no object slot */ +TPM_RC +ObjectLoadEvict( + TPM_HANDLE *handle, // IN:OUT: evict object handle. If success, it + // will be replace by the loaded object handle + COMMAND_INDEX commandIndex // IN: the command being processed + ) +{ + TPM_RC result; + TPM_HANDLE evictHandle = *handle; // Save the evict handle + OBJECT *object; + // If this is an index that references a persistent object created by + // the platform, then return TPM_RH_HANDLE if the phEnable is FALSE + if(*handle >= PLATFORM_PERSISTENT) + { + // belongs to platform + if(g_phEnable == CLEAR) + return TPM_RC_HANDLE; + } + // belongs to owner + else if(gc.shEnable == CLEAR) + return TPM_RC_HANDLE; + // Try to allocate a slot for an object + object = ObjectAllocateSlot(handle); + if(object == NULL) + return TPM_RC_OBJECT_MEMORY; + // Copy persistent object to transient object slot. A TPM_RC_HANDLE + // may be returned at this point. This will mark the slot as containing + // a transient object so that it will be flushed at the end of the + // command + result = NvGetEvictObject(evictHandle, object); + // Bail out if this failed + if(result != TPM_RC_SUCCESS) + return result; + // check the object to see if it is in the endorsement hierarchy + // if it is and this is not a TPM2_EvictControl() command, indicate + // that the hierarchy is disabled. + // If the associated hierarchy is disabled, make it look like the + // handle is not defined + if(ObjectGetHierarchy(object) == TPM_RH_ENDORSEMENT + && gc.ehEnable == CLEAR + && GetCommandCode(commandIndex) != TPM_CC_EvictControl) + return TPM_RC_HANDLE; + return result; +} +/* 8.6.3.25 ObjectComputeName() */ +/* This does the name computation from a public area (can be marshaled or not). */ +TPM2B_NAME * +ObjectComputeName( + UINT32 size, // IN: the size of the area to digest + BYTE *publicArea, // IN: the public area to digest + TPM_ALG_ID nameAlg, // IN: the hash algorithm to use + TPM2B_NAME *name // OUT: Computed name + ) +{ + // Hash the publicArea into the name buffer leaving room for the nameAlg + name->t.size = CryptHashBlock(nameAlg, size, publicArea, + sizeof(name->t.name) - 2, + &name->t.name[2]); + // set the nameAlg + UINT16_TO_BYTE_ARRAY(nameAlg, name->t.name); + name->t.size += 2; + return name; +} +/* 8.6.3.26 PublicMarshalAndComputeName() */ +/* This function computes the Name of an object from its public area. */ +TPM2B_NAME * +PublicMarshalAndComputeName( + TPMT_PUBLIC *publicArea, // IN: public area of an object + TPM2B_NAME *name // OUT: name of the object + ) +{ + // Will marshal a public area into a template. This is because the internal + // format for a TPM2B_PUBLIC is a structure and not a simple BYTE buffer. + TPM2B_TEMPLATE marshaled; // this is big enough to hold a + // marshaled TPMT_PUBLIC + BYTE *buffer = (BYTE *)&marshaled.t.buffer; + // if the nameAlg is NULL then there is no name. + if(publicArea->nameAlg == TPM_ALG_NULL) + name->t.size = 0; + else + { + // Marshal the public area into its canonical form + marshaled.t.size = TPMT_PUBLIC_Marshal(publicArea, &buffer, NULL); + // and compute the name + ObjectComputeName(marshaled.t.size, marshaled.t.buffer, + publicArea->nameAlg, name); + } + return name; +} +/* 8.6.3.28 ComputeQualifiedName() */ +/* This function computes the qualified name of an object. */ +void +ComputeQualifiedName( + TPM_HANDLE parentHandle, // IN: parent's handle + TPM_ALG_ID nameAlg, // IN: name hash + TPM2B_NAME *name, // IN: name of the object + TPM2B_NAME *qualifiedName // OUT: qualified name of the object + ) +{ + HASH_STATE hashState; // hash state + TPM2B_NAME parentName; + if(parentHandle == TPM_RH_UNASSIGNED) + { + MemoryCopy2B(&qualifiedName->b, &name->b, sizeof(qualifiedName->t.name)); + *qualifiedName = *name; + } + else + { + GetQualifiedName(parentHandle, &parentName); + // QN_A = hash_A (QN of parent || NAME_A) + // Start hash + qualifiedName->t.size = CryptHashStart(&hashState, nameAlg); + // Add parent's qualified name + CryptDigestUpdate2B(&hashState, &parentName.b); + // Add self name + CryptDigestUpdate2B(&hashState, &name->b); + // Complete hash leaving room for the name algorithm + CryptHashEnd(&hashState, qualifiedName->t.size, + &qualifiedName->t.name[2]); + UINT16_TO_BYTE_ARRAY(nameAlg, qualifiedName->t.name); + qualifiedName->t.size += 2; + } + return; +} +/* 8.6.3.29 ObjectIsStorage() */ +/* This function determines if an object has the attributes associated with a parent. A parent is an + asymmetric or symmetric block cipher key that has its restricted and decrypt attributes SET, and + sign CLEAR. */ +/* Return Values Meaning */ +/* TRUE if the object is a storage key */ +/* FALSE if the object is not a storage key */ +BOOL +ObjectIsStorage( + TPMI_DH_OBJECT handle // IN: object handle + ) +{ + OBJECT *object = HandleToObject(handle); + TPMT_PUBLIC *publicArea = ((object != NULL) ? &object->publicArea : NULL); + // + return (publicArea != NULL + && IS_ATTRIBUTE(publicArea->objectAttributes, TPMA_OBJECT, restricted) + && IS_ATTRIBUTE(publicArea->objectAttributes, TPMA_OBJECT, decrypt) + && !IS_ATTRIBUTE(publicArea->objectAttributes, TPMA_OBJECT, sign) + && (object->publicArea.type == ALG_RSA_VALUE + || object->publicArea.type == ALG_ECC_VALUE)); +} +/* 8.6.3.30 ObjectCapGetLoaded() */ +/* This function returns a a list of handles of loaded object, starting from handle. Handle must be + in the range of valid transient object handles, but does not have to be the handle of a loaded + transient object. */ +/* Return Values Meaning */ +/* YES if there are more handles available */ +/* NO all the available handles has been returned */ +TPMI_YES_NO +ObjectCapGetLoaded( + TPMI_DH_OBJECT handle, // IN: start handle + UINT32 count, // IN: count of returned handles + TPML_HANDLE *handleList // OUT: list of handle + ) +{ + TPMI_YES_NO more = NO; + UINT32 i; + pAssert(HandleGetType(handle) == TPM_HT_TRANSIENT); + // Initialize output handle list + handleList->count = 0; + // The maximum count of handles we may return is MAX_CAP_HANDLES + if(count > MAX_CAP_HANDLES) count = MAX_CAP_HANDLES; + // Iterate object slots to get loaded object handles + for(i = handle - TRANSIENT_FIRST; i < MAX_LOADED_OBJECTS; i++) + { + if(s_objects[i].attributes.occupied == TRUE) + { + // A valid transient object can not be the copy of a persistent object + pAssert(s_objects[i].attributes.evict == CLEAR); + if(handleList->count < count) + { + // If we have not filled up the return list, add this object + // handle to it + handleList->handle[handleList->count] = i + TRANSIENT_FIRST; + handleList->count++; + } + else + { + // If the return list is full but we still have loaded object + // available, report this and stop iterating + more = YES; + break; + } + } + } + return more; +} +/* 8.6.3.31 ObjectCapGetTransientAvail() */ +/* This function returns an estimate of the number of additional transient objects that could be + loaded into the TPM. */ +UINT32 +ObjectCapGetTransientAvail( + void + ) +{ + UINT32 i; + UINT32 num = 0; + // Iterate object slot to get the number of unoccupied slots + for(i = 0; i < MAX_LOADED_OBJECTS; i++) + { + if(s_objects[i].attributes.occupied == FALSE) num++; + } + return num; +} +/* 8.6.3.32 ObjectGetPublicAttributes() */ +/* Returns the attributes associated with an object handles. */ +TPMA_OBJECT +ObjectGetPublicAttributes( + TPM_HANDLE handle + ) +{ + return HandleToObject(handle)->publicArea.objectAttributes; +} +#if 0 /* libtpms added */ +OBJECT_ATTRIBUTES +ObjectGetProperties( + TPM_HANDLE handle + ) +{ + return HandleToObject(handle)->attributes; +} +#endif /* libtpms added */ |