#include "ckcapi.h"

#include "pkcs11/pkcs11n.h"

#include <memory.h>

static CkCapiArray* object_array = NULL;
static CkCapiHash* object_hash = NULL;

static void 
object_free(CkCapiObject* obj)
{
	ASSERT(obj);
	ASSERT(obj->obj_funcs);
	ASSERT(obj->obj_funcs->release);
	(obj->obj_funcs->release)(obj);
}

void
ckcapi_object_clear_all(void)
{
	size_t i;

	ckcapi_lock_global();

		if(object_hash)
		{
			ckcapi_hash_free(object_hash, NULL);
			object_hash = NULL;
		}

		if(object_array)
		{
			for(i = 1; i < object_array->len; ++i)
			{
				ASSERT(ckcapi_array_index(object_array, CkCapiObject*, i));
				object_free(ckcapi_array_index(object_array, CkCapiObject*, i));
			}

			ckcapi_array_free(object_array, TRUE);
			object_array = NULL;
		}

	ckcapi_unlock_global();
}

CK_OBJECT_HANDLE
ckcapi_object_get_max_handle(void)
{
	if(!object_array)
		return 0;
	return object_array->len;
}

CkCapiObject*
ckcapi_object_lookup(CkCapiSession* sess, CK_OBJECT_HANDLE obj)
{
	/* This must be called without any locks held */

	CkCapiObject* ret = NULL;

	ASSERT(sess);
	ASSERT(obj > 0);
	
	ckcapi_lock_global();
	
		if(object_array && obj < object_array->len)
			ret = ckcapi_array_index(object_array, CkCapiObject*, obj);

	ckcapi_unlock_global();

	return ret;
}

CK_RV
ckcapi_object_register(CkCapiSession* sess, CkCapiObject* obj)
{
	CkCapiObject* prev;
	CK_RV ret = CKR_OK;
	void* key;
	size_t klen;

	ASSERT(sess);
	ASSERT(obj->id == 0);
	ASSERT(obj->unique_key);
	ASSERT(obj->unique_len > 0);

	DBG(("registering object"));

	ckcapi_lock_global();

		if(!object_array)
		{
			object_array = ckcapi_array_sized_new(0, 1, sizeof(CkCapiObject*), 16);
			if(object_array) 
			{
				/* A blank entry for '0' */
				CkCapiObject* blank = NULL;
				ckcapi_array_append(object_array, blank);
			}

			object_hash = ckcapi_hash_new();


			if(!object_array || !object_hash)
			{
				/* Allocation failed above */
				ret = CKR_HOST_MEMORY;
			}
		}

		if(ret == CKR_OK)
		{
			ASSERT(object_array);
			ASSERT(object_hash);

			/* The type of object is part of the hash */
			key = obj->unique_key;
			klen = obj->unique_len;

			/* Sanity check, in case calcs went wrong somewhere */
			ASSERT(klen < 0xFFFFFF);

			/* Look in the hash and find a previous object */
			prev = ckcapi_hash_get(object_hash, key, klen);
			if(prev)
			{
				/* Register it in the previous object's place */
				obj->id = prev->id;
				ASSERT(prev->id < object_array->len);
				if(ckcapi_hash_set(object_hash, key, klen, obj))
				{
					ckcapi_array_index(object_array, CkCapiObject*, obj->id) = obj;
					object_free(prev);
					DBGO(obj, "found old object id");
				}
				else
				{
					ret = CKR_HOST_MEMORY;
				}
				
			}
			else
			{
				/* Register it at the end of the array */
				obj->id = object_array->len;
				ASSERT(obj->id > 0);
				if(ckcapi_hash_set(object_hash, key, klen, obj))
				{
					if(ckcapi_array_append(object_array, obj))
					{
						DBGO(obj, "registered new object id");
					}
					else
					{
						ret = CKR_HOST_MEMORY;

						/* Roll back our addition */
						ckcapi_hash_rem(object_hash, key, klen);
					}
				}
				else
				{
					ret = CKR_HOST_MEMORY;
				}
			}
		}

	ckcapi_unlock_global();

	return ret;

}

enum 
{
	DATA_UNKNOWN = 0,
	DATA_BOOL,
	DATA_ULONG,
	DATA_DATE,
	DATA_BYTES
};

int
attribute_data_type(CK_ATTRIBUTE_TYPE type)
{
	switch(type)
	{
	// CK_ULONG attribute types
	case CKA_CLASS:
	case CKA_CERTIFICATE_TYPE:
	case CKA_CERTIFICATE_CATEGORY:
	case CKA_KEY_TYPE:
	case CKA_MODULUS_BITS:
	case CKA_PRIME_BITS:
	case CKA_SUBPRIME_BITS:
	/* case CKA_SUB_PRIME_BITS: */
	case CKA_VALUE_BITS:
	case CKA_VALUE_LEN:
	case CKA_KEY_GEN_MECHANISM:
	case CKA_HW_FEATURE_TYPE:
	case CKA_PIXEL_X:
	case CKA_PIXEL_Y:
	case CKA_RESOLUTION:
	case CKA_CHAR_ROWS:
	case CKA_CHAR_COLUMNS:
	case CKA_BITS_PER_PIXEL:
	case CKA_MECHANISM_TYPE:
	case CKA_JAVA_MIDP_SECURITY_DOMAIN:
	case CKA_TRUST_SERVER_AUTH:
	case CKA_TRUST_CLIENT_AUTH:
	case CKA_TRUST_CODE_SIGNING:
	case CKA_TRUST_EMAIL_PROTECTION:
	case CKA_TRUST_IPSEC_END_SYSTEM:
	case CKA_TRUST_IPSEC_TUNNEL:
	case CKA_TRUST_IPSEC_USER:
	case CKA_TRUST_TIME_STAMPING:
		return DATA_ULONG;

	// CK_BBOOL attribute types
	case CKA_TOKEN:
	case CKA_PRIVATE:
	case CKA_MODIFIABLE:
	case CKA_TRUSTED:
	case CKA_SENSITIVE:
	case CKA_DECRYPT:
	case CKA_SIGN:
	case CKA_SIGN_RECOVER:
	case CKA_UNWRAP:
	case CKA_EXTRACTABLE:
	case CKA_NEVER_EXTRACTABLE:
	case CKA_ALWAYS_SENSITIVE:
	case CKA_WRAP_WITH_TRUSTED:
	case CKA_ALWAYS_AUTHENTICATE:
	case CKA_ENCRYPT:
	case CKA_WRAP:
	case CKA_VERIFY:
	case CKA_VERIFY_RECOVER:
	case CKA_DERIVE:
	case CKA_LOCAL:
	case CKA_RESET_ON_INIT:
	case CKA_HAS_RESET:
	case CKA_COLOR:
	case CKA_TRUST_STEP_UP_APPROVED:
		return DATA_BOOL;

	// Raw or string data
	case CKA_LABEL:
	case CKA_APPLICATION:
	case CKA_VALUE:
	case CKA_OBJECT_ID:
	case CKA_CHECK_VALUE:
	case CKA_ISSUER:
	case CKA_SERIAL_NUMBER:
	case CKA_SUBJECT:
	case CKA_ID:
	case CKA_URL:
	case CKA_HASH_OF_SUBJECT_PUBLIC_KEY:
	case CKA_HASH_OF_ISSUER_PUBLIC_KEY:
	case CKA_AC_ISSUER:
	case CKA_OWNER:
	case CKA_ATTR_TYPES:
	case CKA_MODULUS:
	case CKA_PUBLIC_EXPONENT:
	case CKA_PRIVATE_EXPONENT:
	case CKA_PRIME_1:
	case CKA_PRIME_2:
	case CKA_EXPONENT_1:
	case CKA_EXPONENT_2:
	case CKA_COEFFICIENT:
	case CKA_PRIME:
	case CKA_SUBPRIME:
	case CKA_BASE:
	case CKA_ECDSA_PARAMS:
	/* case CKA_EC_PARAMS: */
	case CKA_EC_POINT:
	case CKA_CHAR_SETS:
	case CKA_ENCODING_METHODS:
	case CKA_MIME_TYPES:
	case CKA_REQUIRED_CMS_ATTRIBUTES:
	case CKA_DEFAULT_CMS_ATTRIBUTES:
	case CKA_SUPPORTED_CMS_ATTRIBUTES:
	case CKA_CERT_SHA1_HASH:
	case CKA_CERT_MD5_HASH:
		return DATA_BYTES;

	// CK_DATE data
	case CKA_START_DATE:
	case CKA_END_DATE:
		return DATA_DATE;

	// Arrays are nasty
	case CKA_WRAP_TEMPLATE:
	case CKA_ALLOWED_MECHANISMS:
	case CKA_UNWRAP_TEMPLATE:
	default:
		DBG(("unknown attribute type: %x\n", type));
		return DATA_UNKNOWN;
	};
}

CK_BBOOL
ckcapi_object_data_match_attr(CkCapiObjectData* objdata, CK_ATTRIBUTE_PTR match)
{
	CK_ATTRIBUTE attr;
	CK_RV rv;
	int dtype;

	ASSERT(match);
	ASSERT(objdata);
	ASSERT(objdata->data_funcs);

	/* Get the data type of the attribute */
	dtype = attribute_data_type(match->type);
	if(dtype == DATA_UNKNOWN)
		return CK_FALSE;

	/* We only do byte matching */
	if(match->pValue == NULL)
		return CK_FALSE;

	/* Only load as much data as is needed */
	attr.type = match->type;
	attr.pValue = _alloca(match->ulValueLen > 4 ? match->ulValueLen : 4);
	attr.ulValueLen = match->ulValueLen;

	switch(dtype)
	{
	case DATA_BOOL:
		rv = (objdata->data_funcs->get_bool)(objdata, &attr);
		break;
	case DATA_ULONG:
		rv = (objdata->data_funcs->get_ulong)(objdata, &attr);
		break;
	case DATA_BYTES:
		rv = (objdata->data_funcs->get_bytes)(objdata, &attr);
		break;
	case DATA_DATE:
		rv = (objdata->data_funcs->get_date)(objdata, &attr);
		break;
	default:
		ASSERT(0 && "unrecognized type");
		break;
	};

	/* Unrecognized attribute */
	if(rv == CKR_ATTRIBUTE_TYPE_INVALID)
		return CK_FALSE;

	/* Value is longer than this one */
	if(rv == CKR_BUFFER_TOO_SMALL)
		return CK_FALSE;

	/* All other errors */
	if(rv != CKR_OK)
		return CK_FALSE;

	return (match->ulValueLen == attr.ulValueLen &&
		    memcmp(match->pValue, attr.pValue, attr.ulValueLen) == 0);
}

CK_BBOOL
ckcapi_object_data_match(CkCapiObjectData* objdata, CK_ATTRIBUTE_PTR matches, 
						 CK_ULONG count)
{
	CK_ULONG i;

	for(i = 0; i < count; ++i)
	{
		if(!ckcapi_object_data_match_attr(objdata, &matches[i]))
			return CK_FALSE;
	}

	return CK_TRUE;
}

CK_RV
ckcapi_object_data_get_attrs(CkCapiObjectData* objdata, CK_ATTRIBUTE_PTR attrs, 
							 CK_ULONG count)
{
	CK_ULONG i;
	CK_RV rv, ret = CKR_OK;

	ASSERT(objdata);
	ASSERT(!count || attrs);

	for(i = 0; i < count; ++i)
	{
		/* Get the data type of the attribute */
		switch(attribute_data_type(attrs[i].type))
		{
		case DATA_BOOL:
			rv = (objdata->data_funcs->get_bool)(objdata, &attrs[i]);
			break;
		case DATA_ULONG:
			rv = (objdata->data_funcs->get_ulong)(objdata, &attrs[i]);
			break;
		case DATA_BYTES:
			rv = (objdata->data_funcs->get_bytes)(objdata, &attrs[i]);
			break;
		case DATA_DATE:
			rv = (objdata->data_funcs->get_date)(objdata, &attrs[i]);
			break;
		case DATA_UNKNOWN:
			rv = CKR_ATTRIBUTE_TYPE_INVALID;
			break;
		default:
			ASSERT(0 && "unrecognized type");
			break;
		};

		/* Not an error if they were just requesting the size */
		if(rv != CKR_OK)
		{
			if(rv == CKR_BUFFER_TOO_SMALL)
			{
				if(!attrs[i].pValue)
					rv = CKR_OK;
			}

			/* Attribute is sensitive */
			else if(rv == CKR_ATTRIBUTE_SENSITIVE)
			{
				attrs[i].ulValueLen = (CK_ULONG)-1;
			}

			/* Attribute doesn't exist */
			else if(rv == CKR_ATTRIBUTE_TYPE_INVALID)
			{
				DBG(("O%d: attribute not found: 0x%08x", objdata->object, attrs[i].type));
				attrs[i].ulValueLen = (CK_ULONG)-1;
			}

			/* A fatal error? */
			else
			{
				ret = rv;
				break;
			}

			/* Transfer any non-fatal errors outward */
			if(rv != CKR_OK && ret == CKR_OK)
				ret = rv;
		}
	}

	return ret;
}