path: root/usr/src/lib/pkcs11/pkcs11_tpm/common/object.c

/*
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 * (C) COPYRIGHT International Business Machines Corp. 2001, 2002
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include "tpmtok_int.h"

// object_create()
//
// Creates an object with the specified attributes.  Verifies that all required
// attributes are present and adds any missing attributes that have Cryptoki
// defined default values.  This routine does not check whether the session is
// authorized to create the object.  That is done elsewhere
// (see object_mgr_create())
CK_RV
object_create(CK_ATTRIBUTE  * pTemplate,
	CK_ULONG	ulCount,
	OBJECT	** obj)
{
	OBJECT	* o	   = NULL;
	CK_ATTRIBUTE  * attr	= NULL;
	CK_ATTRIBUTE  * sensitive   = NULL;
	CK_ATTRIBUTE  * extractable = NULL;
	CK_ATTRIBUTE  * local	= NULL;
	CK_BBOOL	class_given = FALSE;
	CK_BBOOL	subclass_given = FALSE;
	CK_BBOOL	flag;
	CK_ULONG	class = 0xFFFFFFFF, subclass = 0xFFFFFFFF;
	CK_RV	   rc;
	unsigned int    i;

	if (! pTemplate) {
		return (CKR_FUNCTION_FAILED);
	}
	// extract the object class and subclass
	//
	attr = pTemplate;
	for (i = 0; i < ulCount; i++, attr++) {
		if (attr->type == CKA_CLASS) {
			class = *(CK_OBJECT_CLASS *)attr->pValue;
			class_given = TRUE;
		}

		if (attr->type == CKA_CERTIFICATE_TYPE) {
			subclass = *(CK_CERTIFICATE_TYPE *)attr->pValue;
			subclass_given = TRUE;
		}

		if (attr->type == CKA_KEY_TYPE) {
			subclass = *(CK_KEY_TYPE *)attr->pValue;
			subclass_given = TRUE;
		}

		if (attr->type == CKA_HW_FEATURE_TYPE) {
			subclass = *(CK_HW_FEATURE_TYPE *)attr->pValue;
			subclass_given = TRUE;
		}
	}

	if (class_given == FALSE) {
		return (CKR_TEMPLATE_INCOMPLETE);
	}
	if (class != CKO_DATA && subclass_given != TRUE) {
		return (CKR_TEMPLATE_INCOMPLETE);
	}

	rc = object_create_skel(pTemplate, ulCount,
	    MODE_CREATE, class, subclass, &o);
	if (rc != CKR_OK) {
		return (rc);
	}
	// for key objects, we need be careful...
	//
	// note:  I would think that keys loaded with C_CreateObject should
	//	have their CKA_NEVER_EXTRACTABLE == FALSE and
	//	CKA_ALWAYS_SENSITIVE == FALSE since the key data was presumably
	//	stored in the clear prior to the call to C_CreateObject.  The
	//	PKCS #11 spec doesn't impose this restriction however.
	//
	if (class == CKO_PRIVATE_KEY || class == CKO_SECRET_KEY) {
		rc = template_attribute_find(o->template, CKA_SENSITIVE, &attr);
		if (rc == FALSE) {
			rc = CKR_FUNCTION_FAILED;
			goto error;
		}

		flag = *(CK_BBOOL *)attr->pValue;

		rc = build_attribute(CKA_ALWAYS_SENSITIVE, &flag,
		    sizeof (CK_BYTE), &sensitive);
		if (rc != CKR_OK) {
			goto error;
		}

		rc = template_attribute_find(o->template, CKA_EXTRACTABLE,
		    &attr);
		if (rc == FALSE) {
			rc = CKR_FUNCTION_FAILED;
			goto error;
		}

		flag = *(CK_BBOOL *)attr->pValue;
		flag = (~flag) & 0x1;

		rc = build_attribute(CKA_NEVER_EXTRACTABLE, &flag,
		    sizeof (CK_BYTE), &extractable);
		if (rc != CKR_OK) {
			goto error;
		}
		(void) template_update_attribute(o->template, sensitive);
		(void) template_update_attribute(o->template, extractable);
	}

	*obj = o;

	return (CKR_OK);
error:
	if (sensitive)    free(sensitive);
	if (extractable)  free(extractable);
	if (local)	free(local);

	(void) object_free(o);
	return (rc);
}

// object_copy()
//
// Builds a copy of the specified object.  The new object gets the original
// object's attribute template plus any additional attributes that are
// specified.   Verifies that all required attributes are present.  This
// routine does not check whether the session is authorized to copy the
// object -- routines at the individual object level don't have the
// concept of "session".  These checks are done by the object manager.
//
CK_RV
object_copy(CK_ATTRIBUTE  * pTemplate,
	CK_ULONG	ulCount,
	OBJECT	* old_obj,
	OBJECT	** new_obj)
{
	TEMPLATE  * tmpl	= NULL;
	TEMPLATE  * new_tmpl = NULL;
	OBJECT    * o	= NULL;
	CK_BBOOL    found;
	CK_ULONG    class, subclass;
	CK_RV	rc;


	if (! old_obj || ! pTemplate || ! new_obj) {
		return (CKR_FUNCTION_FAILED);
	}
	o	= (OBJECT   *)malloc(sizeof (OBJECT));
	tmpl	= (TEMPLATE *)malloc(sizeof (TEMPLATE));
	new_tmpl = (TEMPLATE *)malloc(sizeof (TEMPLATE));

	if (! o || ! tmpl || ! new_tmpl) {
		rc = CKR_HOST_MEMORY;
		goto error;
	}

	(void) memset(o, 0x0, sizeof (OBJECT));
	(void) memset(tmpl,	0x0, sizeof (TEMPLATE));
	(void) memset(new_tmpl, 0x0, sizeof (TEMPLATE));

	// copy the original object's attribute template
	//
	rc = template_copy(tmpl, old_obj->template);
	if (rc != CKR_OK) {
		goto error;
	}
	rc = template_add_attributes(new_tmpl, pTemplate, ulCount);
	if (rc != CKR_OK) {
		goto error;
	}
	// at this point, the new object has the list of attributes.  we need
	// to do some more checking now:
	//    1) invalid attribute values
	//    2) missing required attributes
	//    3) attributes inappropriate for the object class
	//    4) conflicting attributes/values
	//

	found = template_get_class(tmpl, &class, &subclass);
	if (found == FALSE) {
		rc = CKR_TEMPLATE_INCONSISTENT;
		goto error;
	}

	// The user cannot change object classes so we assume the existing
	// object attributes are valid.  we still need to check the new
	// attributes.   We cannot merge the new attributes in with the
	// old ones and then check for validity because some attributes
	// are added internally and are not allowed to be specified by
	// the user (ie. CKA_LOCAL for key types) but may still be part
	// of the old template.
	rc = template_validate_attributes(new_tmpl, class, subclass,
	    MODE_COPY);
	if (rc != CKR_OK)
		goto error;

	rc = template_merge(tmpl, &new_tmpl);
	if (rc != CKR_OK) {
		goto error;
	}

	rc = template_check_required_attributes(tmpl, class,
	    subclass, MODE_COPY);
	if (rc != CKR_OK)
		goto error;

	o->template = tmpl;
	*new_obj = o;

	return (CKR_OK);
error:
	if (tmpl)
		(void) template_free(tmpl);
	if (new_tmpl)
		(void) template_free(new_tmpl);
	if (o)
		(void) object_free(o);

	return (rc);
}

CK_RV
object_flatten(OBJECT    * obj,
	CK_BYTE  ** data,
	UINT32  *len)
{
	CK_BYTE    * buf = NULL;
	CK_ULONG_32	tmpl_len, total_len;
	CK_ULONG_32	offset;
	CK_ULONG_32	count;
	long	 rc;

	if (! obj) {
		return (CKR_FUNCTION_FAILED);
	}
	count    = template_get_count(obj->template);
	tmpl_len = template_get_compressed_size(obj->template);

	total_len = tmpl_len + sizeof (CK_OBJECT_CLASS_32) +
	    sizeof (CK_ULONG_32) + 8;

	buf = (CK_BYTE *)malloc(total_len);
	if (!buf) {
		return (CKR_HOST_MEMORY);
	}

	(void) memset((CK_BYTE *)buf, 0x0, total_len);

	offset = 0;

	(void) memcpy(buf + offset, &obj->class, sizeof (CK_OBJECT_CLASS_32));
	offset += sizeof (CK_OBJECT_CLASS_32);

	(void) memcpy(buf + offset, &count, sizeof (CK_ULONG_32));
	offset += sizeof (CK_ULONG_32);

	(void) memcpy(buf + offset, &obj->name,  sizeof (CK_BYTE) * 8);
	offset += 8;
	rc = template_flatten(obj->template, buf + offset);
	if (rc != CKR_OK) {
		free(buf);
		return (rc);
	}

	*data = buf;
	*len  = total_len;

	return (CKR_OK);
}

CK_BBOOL
object_free(OBJECT *obj)
{
	(void) template_free(obj->template);
	free(obj);

	return (TRUE);
}


// object_is_modifiable()
//
CK_BBOOL
object_is_modifiable(OBJECT *obj)
{
	CK_ATTRIBUTE  * attr = NULL;
	CK_BBOOL	modifiable;
	CK_BBOOL	found;

	found = template_attribute_find(obj->template, CKA_MODIFIABLE, &attr);
	if (found == FALSE)
		return (TRUE);

	modifiable = *(CK_BBOOL *)attr->pValue;

	return (modifiable);
}


// object_is_private()
//
// an is_private member should probably be added to OBJECT
//
CK_BBOOL
object_is_private(OBJECT *obj) {
	CK_ATTRIBUTE  * attr = NULL;
	CK_BBOOL	priv;
	CK_BBOOL	found;

	found = template_attribute_find(obj->template, CKA_PRIVATE, &attr);
	if (found == FALSE)
		return (TRUE);

	if (attr == NULL)
		return (TRUE);

	priv = *((CK_BBOOL *)attr->pValue);

	return (priv);
}

CK_BBOOL
object_is_public(OBJECT *obj) {
	CK_BBOOL rc;

	rc = object_is_private(obj);

	if (rc)
		return (FALSE);
	return (TRUE);
}

CK_BBOOL
object_is_token_object(OBJECT *obj) {
	CK_ATTRIBUTE  * attr = NULL;
	CK_BBOOL	is_token;
	CK_BBOOL	found;

	found = template_attribute_find(obj->template,
	    CKA_TOKEN, &attr);
	if (found == FALSE)
		return (FALSE);
	is_token = *(CK_BBOOL *)attr->pValue;
	return (is_token);
}

CK_BBOOL
object_is_session_object(OBJECT *obj) {
	CK_BBOOL rc;

	rc = object_is_token_object(obj);

	if (rc)
		return (FALSE);
	else
		return (TRUE);
}

CK_ULONG
object_get_size(OBJECT *obj) {
	CK_ULONG  size;

	size = sizeof (OBJECT) + template_get_size(obj->template);

	return (size);
}

CK_RV
object_get_attribute_values(OBJECT	* obj,
	CK_ATTRIBUTE  * pTemplate,
	CK_ULONG	ulCount)
{
	TEMPLATE	  *obj_tmpl = NULL;
	CK_ATTRIBUTE	*attr	= NULL;
	CK_ULONG	   i;
	CK_BBOOL	   flag;
	CK_RV		rc;

	rc = CKR_OK;

	obj_tmpl = obj->template;

	for (i = 0; i < ulCount; i++) {
		flag = template_check_exportability(obj_tmpl,
		    pTemplate[i].type);
		if (flag == FALSE) {
			rc = CKR_ATTRIBUTE_SENSITIVE;
			pTemplate[i].ulValueLen = (CK_ULONG) - 1;
			continue;
		}

		flag = template_attribute_find(obj_tmpl,
		    pTemplate[i].type, &attr);
		if (flag == FALSE) {
			rc = CKR_ATTRIBUTE_TYPE_INVALID;
			pTemplate[i].ulValueLen = (CK_ULONG) - 1;
			continue;
		}

		if (pTemplate[i].pValue == NULL) {
			pTemplate[i].ulValueLen = attr->ulValueLen;
		} else if (pTemplate[i].ulValueLen >= attr->ulValueLen) {
			(void) memcpy(pTemplate[i].pValue, attr->pValue,
			    attr->ulValueLen);
			pTemplate[i].ulValueLen = attr->ulValueLen;
		} else {
			rc = CKR_BUFFER_TOO_SMALL;
			pTemplate[i].ulValueLen = (CK_ULONG) - 1;
		}
	}

	return (rc);
}

CK_RV
object_set_attribute_values(OBJECT	* obj,
	CK_ATTRIBUTE  * pTemplate,
	CK_ULONG	ulCount)
{
	TEMPLATE * new_tmpl;
	CK_BBOOL   found;
	CK_ULONG   class, subclass;
	CK_RV	rc;

	if (! obj || ! pTemplate) {
		return (CKR_FUNCTION_FAILED);
	}

	found = template_get_class(obj->template, &class, &subclass);
	if (found == FALSE) {
		rc = CKR_FUNCTION_FAILED;
		goto error;
	}

	new_tmpl = (TEMPLATE *)malloc(sizeof (TEMPLATE));
	if (! new_tmpl) {
		return (CKR_HOST_MEMORY);
	}
	(void) memset(new_tmpl, 0x0, sizeof (TEMPLATE));

	rc = template_add_attributes(new_tmpl, pTemplate, ulCount);
	if (rc != CKR_OK) {
		goto error;
	}

	rc = template_validate_attributes(new_tmpl, class,
	    subclass, MODE_MODIFY);
	if (rc != CKR_OK) {
		goto error;
	}

	rc = template_merge(obj->template, &new_tmpl);
	if (rc != CKR_OK) {
		return (rc);
	}
	return (CKR_OK);
error:
	if (new_tmpl)
		(void) template_free(new_tmpl);
	return (rc);
}

CK_RV
object_restore(CK_BYTE *data, OBJECT **new_obj, CK_BBOOL replace) {
	TEMPLATE  * tmpl = NULL;
	OBJECT    * obj  = NULL;
	CK_ULONG    offset = 0;
	CK_ULONG_32    count = 0;
	CK_RV	rc;

	if (! data || ! new_obj) {
		return (CKR_FUNCTION_FAILED);
	}
	obj = (OBJECT *)malloc(sizeof (OBJECT));
	if (! obj) {
		rc = CKR_HOST_MEMORY;
		goto error;
	}


	(void) memset(obj, 0x0, sizeof (OBJECT));

	(void) memcpy(&obj->class, data + offset, sizeof (CK_OBJECT_CLASS_32));
	offset += sizeof (CK_OBJECT_CLASS_32);

	(void) memcpy(&count, data + offset, sizeof (CK_ULONG_32));
	offset += sizeof (CK_ULONG_32);


	(void) memcpy(&obj->name, data + offset, 8);
	offset += 8;

	rc = template_unflatten(&tmpl, data + offset, count);
	if (rc != CKR_OK) {
		goto error;
	}
	obj->template = tmpl;

	if (replace == FALSE) {
		 *new_obj = obj;
	} else {
		(void) template_free((*new_obj)->template);
		(void) memcpy(*new_obj, obj, sizeof (OBJECT));

		free(obj);
	}

	return (CKR_OK);
error:
	if (obj)
		(void) object_free(obj);
	if (tmpl)
		(void) template_free(tmpl);

	return (rc);
}


//
//
CK_RV
object_create_skel(CK_ATTRIBUTE  * pTemplate,
	CK_ULONG	ulCount,
	CK_ULONG	mode,
	CK_ULONG	class,
	CK_ULONG	subclass,
	OBJECT	** obj) {
	TEMPLATE  * tmpl  = NULL;
	TEMPLATE  * tmpl2 = NULL;
	OBJECT   * o	= NULL;
	CK_RV	rc;


	if (! obj) {
		return (CKR_FUNCTION_FAILED);
	}
	if (! pTemplate && (ulCount != 0)) {
		return (CKR_FUNCTION_FAILED);
	}
	o	= (OBJECT *)malloc(sizeof (OBJECT));
	tmpl  = (TEMPLATE *)malloc(sizeof (TEMPLATE));
	tmpl2 = (TEMPLATE *)malloc(sizeof (TEMPLATE));

	if (! o || ! tmpl || ! tmpl2) {
		rc = CKR_HOST_MEMORY;
		goto done;
	}
	(void) memset(o,	0x0, sizeof (OBJECT));
	(void) memset(tmpl,  0x0, sizeof (TEMPLATE));
	(void) memset(tmpl2, 0x0, sizeof (TEMPLATE));


	rc = template_add_default_attributes(tmpl, class, subclass, mode);
	if (rc != CKR_OK)
		goto done;

	rc = template_add_attributes(tmpl2, pTemplate, ulCount);
	if (rc != CKR_OK)
		goto done;


	// at this point, the new template has the list of attributes.  we need
	// to do some more checking now:
	//    1) invalid attribute values
	//    2) missing required attributes
	//    3) attributes inappropriate for the object class
	//    4) conflicting attributes/values
	//

	rc = template_validate_attributes(tmpl2, class, subclass, mode);
	if (rc != CKR_OK) {
		goto done;
	}

	rc = template_check_required_attributes(tmpl2, class, subclass, mode);
	if (rc != CKR_OK) {
		goto done;
	}

	rc = template_merge(tmpl, &tmpl2);
	if (rc != CKR_OK) {
		goto done;
	}
	// at this point, we should have a valid object with correct attributes
	//
	o->template = tmpl;
	 *obj = o;

	return (CKR_OK);
	done:
	if (o)	free(o);
	if (tmpl)
		(void) template_free(tmpl);
	if (tmpl2)
		(void) template_free(tmpl2);

	return (rc);
}