sl@0: /* crypto/store/str_mem.c -*- mode:C; c-file-style: "eay" -*- */
sl@0: /* Written by Richard Levitte (richard@levitte.org) for the OpenSSL
sl@0:  * project 2003.
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 2003 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@openssl.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include <string.h>
sl@0: #include <openssl/err.h>
sl@0: #include "str_locl.h"
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libcrypto_wsd_macros.h"
sl@0: #include "libcrypto_wsd.h"
sl@0: #endif
sl@0: 
sl@0: /* The memory store is currently highly experimental.  It's meant to become
sl@0:    a base store used by other stores for internal caching (for full caching
sl@0:    support, aging needs to be added).
sl@0: 
sl@0:    The database use is meant to support as much attribute association as
sl@0:    possible, while providing for as small search ranges as possible.
sl@0:    This is currently provided for by sorting the entries by numbers that
sl@0:    are composed of bits set at the positions indicated by attribute type
sl@0:    codes.  This provides for ranges determined by the highest attribute
sl@0:    type code value.  A better idea might be to sort by values computed
sl@0:    from the range of attributes associated with the object (basically,
sl@0:    the difference between the highest and lowest attribute type code)
sl@0:    and it's distance from a base (basically, the lowest associated
sl@0:    attribute type code).
sl@0: */
sl@0: 
sl@0: struct mem_object_data_st
sl@0: 	{
sl@0: 	STORE_OBJECT *object;
sl@0: 	STORE_ATTR_INFO *attr_info;
sl@0: 	int references;
sl@0: 	};
sl@0: 
sl@0: struct mem_data_st
sl@0: 	{
sl@0: 	STACK *data;		/* A stack of mem_object_data_st,
sl@0: 				   sorted with STORE_ATTR_INFO_compare(). */
sl@0: 	unsigned int compute_components : 1; /* Currently unused, but can
sl@0: 						be used to add attributes
sl@0: 						from parts of the data. */
sl@0: 	};
sl@0: 
sl@0: struct mem_ctx_st
sl@0: 	{
sl@0: 	int type;		/* The type we're searching for */
sl@0: 	STACK *search_attributes; /* Sets of attributes to search for.
sl@0: 				     Each element is a STORE_ATTR_INFO. */
sl@0: 	int search_index;	/* which of the search attributes we found a match
sl@0: 				   for, -1 when we still haven't found any */
sl@0: 	int index;		/* -1 as long as we're searching for the first */
sl@0: 	};
sl@0: 
sl@0: static int mem_init(STORE *s);
sl@0: static void mem_clean(STORE *s);
sl@0: static STORE_OBJECT *mem_generate(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]);
sl@0: static STORE_OBJECT *mem_get(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]);
sl@0: static int mem_store(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	STORE_OBJECT *data, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[]);
sl@0: static int mem_modify(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM search_attributes[], OPENSSL_ITEM add_attributes[],
sl@0: 	OPENSSL_ITEM modify_attributes[], OPENSSL_ITEM delete_attributes[],
sl@0: 	OPENSSL_ITEM parameters[]);
sl@0: static int mem_delete(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]);
sl@0: static void *mem_list_start(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]);
sl@0: static STORE_OBJECT *mem_list_next(STORE *s, void *handle);
sl@0: static int mem_list_end(STORE *s, void *handle);
sl@0: static int mem_list_endp(STORE *s, void *handle);
sl@0: static int mem_lock(STORE *s, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[]);
sl@0: static int mem_unlock(STORE *s, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[]);
sl@0: static int mem_ctrl(STORE *s, int cmd, long l, void *p, void (*f)(void));
sl@0: 
sl@0: 
sl@0: #ifndef EMULATOR
sl@0: static STORE_METHOD store_memory =
sl@0: 	{
sl@0: 	"OpenSSL memory store interface",
sl@0: 	mem_init,
sl@0: 	mem_clean,
sl@0: 	mem_generate,
sl@0: 	mem_get,
sl@0: 	mem_store,
sl@0: 	mem_modify,
sl@0: 	NULL, /* revoke */
sl@0: 	mem_delete,
sl@0: 	mem_list_start,
sl@0: 	mem_list_next,
sl@0: 	mem_list_end,
sl@0: 	mem_list_endp,
sl@0: 	NULL, /* update */
sl@0: 	mem_lock,
sl@0: 	mem_unlock,
sl@0: 	mem_ctrl
sl@0: 	};
sl@0: #else
sl@0: GET_STATIC_VAR_FROM_TLS(store_memory,str_mem,STORE_METHOD)
sl@0: #define store_memory (*GET_WSD_VAR_NAME(store_memory,str_mem, s)())
sl@0: const STORE_METHOD temp_s_store_memory =
sl@0: 	{
sl@0: 	"OpenSSL memory store interface",
sl@0: 	mem_init,
sl@0: 	mem_clean,
sl@0: 	mem_generate,
sl@0: 	mem_get,
sl@0: 	mem_store,
sl@0: 	mem_modify,
sl@0: 	NULL, /* revoke */
sl@0: 	mem_delete,
sl@0: 	mem_list_start,
sl@0: 	mem_list_next,
sl@0: 	mem_list_end,
sl@0: 	mem_list_endp,
sl@0: 	NULL, /* update */
sl@0: 	mem_lock,
sl@0: 	mem_unlock,
sl@0: 	mem_ctrl
sl@0: 	};
sl@0: #endif
sl@0: EXPORT_C const STORE_METHOD *STORE_Memory(void)
sl@0: 	{
sl@0: 	return &store_memory;
sl@0: 	}
sl@0: 
sl@0: static int mem_init(STORE *s)
sl@0: 	{
sl@0: 	return 1;
sl@0: 	}
sl@0: 
sl@0: static void mem_clean(STORE *s)
sl@0: 	{
sl@0: 	return;
sl@0: 	}
sl@0: 
sl@0: static STORE_OBJECT *mem_generate(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	STOREerr(STORE_F_MEM_GENERATE, STORE_R_NOT_IMPLEMENTED);
sl@0: 	return 0;
sl@0: 	}
sl@0: static STORE_OBJECT *mem_get(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	void *context = mem_list_start(s, type, attributes, parameters);
sl@0: 	
sl@0: 	if (context)
sl@0: 		{
sl@0: 		STORE_OBJECT *object = mem_list_next(s, context);
sl@0: 
sl@0: 		if (mem_list_end(s, context))
sl@0: 			return object;
sl@0: 		}
sl@0: 	return NULL;
sl@0: 	}
sl@0: static int mem_store(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	STORE_OBJECT *data, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	STOREerr(STORE_F_MEM_STORE, STORE_R_NOT_IMPLEMENTED);
sl@0: 	return 0;
sl@0: 	}
sl@0: static int mem_modify(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM search_attributes[], OPENSSL_ITEM add_attributes[],
sl@0: 	OPENSSL_ITEM modify_attributes[], OPENSSL_ITEM delete_attributes[],
sl@0: 	OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	STOREerr(STORE_F_MEM_MODIFY, STORE_R_NOT_IMPLEMENTED);
sl@0: 	return 0;
sl@0: 	}
sl@0: static int mem_delete(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	STOREerr(STORE_F_MEM_DELETE, STORE_R_NOT_IMPLEMENTED);
sl@0: 	return 0;
sl@0: 	}
sl@0: 
sl@0: /* The list functions may be the hardest to understand.  Basically,
sl@0:    mem_list_start compiles a stack of attribute info elements, and
sl@0:    puts that stack into the context to be returned.  mem_list_next
sl@0:    will then find the first matching element in the store, and then
sl@0:    walk all the way to the end of the store (since any combination
sl@0:    of attribute bits above the starting point may match the searched
sl@0:    for bit pattern...). */
sl@0: static void *mem_list_start(STORE *s, STORE_OBJECT_TYPES type,
sl@0: 	OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	struct mem_ctx_st *context =
sl@0: 		(struct mem_ctx_st *)OPENSSL_malloc(sizeof(struct mem_ctx_st));
sl@0: 	void *attribute_context = NULL;
sl@0: 	STORE_ATTR_INFO *attrs = NULL;
sl@0: 
sl@0: 	if (!context)
sl@0: 		{
sl@0: 		STOREerr(STORE_F_MEM_LIST_START, ERR_R_MALLOC_FAILURE);
sl@0: 		return 0;
sl@0: 		}
sl@0: 	memset(context, 0, sizeof(struct mem_ctx_st));
sl@0: 
sl@0: 	attribute_context = STORE_parse_attrs_start(attributes);
sl@0: 	if (!attribute_context)
sl@0: 		{
sl@0: 		STOREerr(STORE_F_MEM_LIST_START, ERR_R_STORE_LIB);
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	while((attrs = STORE_parse_attrs_next(attribute_context)))
sl@0: 		{
sl@0: 		if (context->search_attributes == NULL)
sl@0: 			{
sl@0: 			context->search_attributes =
sl@0: 				sk_new((int (*)(const char * const *, const char * const *))STORE_ATTR_INFO_compare);
sl@0: 			if (!context->search_attributes)
sl@0: 				{
sl@0: 				STOREerr(STORE_F_MEM_LIST_START,
sl@0: 					ERR_R_MALLOC_FAILURE);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			}
sl@0: 		sk_push(context->search_attributes,(char *)attrs);
sl@0: 		}
sl@0: 	if (!STORE_parse_attrs_endp(attribute_context))
sl@0: 		goto err;
sl@0: 	STORE_parse_attrs_end(attribute_context);
sl@0: 	context->search_index = -1;
sl@0: 	context->index = -1;
sl@0: 	return context;
sl@0:  err:
sl@0: 	if (attribute_context) STORE_parse_attrs_end(attribute_context);
sl@0: 	mem_list_end(s, context);
sl@0: 	return NULL;
sl@0: 	}
sl@0: static STORE_OBJECT *mem_list_next(STORE *s, void *handle)
sl@0: 	{
sl@0: 	int i;
sl@0: 	struct mem_ctx_st *context = (struct mem_ctx_st *)handle;
sl@0: 	struct mem_object_data_st key = { 0, 0, 1 };
sl@0: 	struct mem_data_st *store =
sl@0: 		(struct mem_data_st *)STORE_get_ex_data(s, 1);
sl@0: 	int srch;
sl@0: 	int cres = 0;
sl@0: 
sl@0: 	if (!context)
sl@0: 		{
sl@0: 		STOREerr(STORE_F_MEM_LIST_NEXT, ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return NULL;
sl@0: 		}
sl@0: 	if (!store)
sl@0: 		{
sl@0: 		STOREerr(STORE_F_MEM_LIST_NEXT, STORE_R_NO_STORE);
sl@0: 		return NULL;
sl@0: 		}
sl@0: 
sl@0: 	if (context->search_index == -1)
sl@0: 		{
sl@0: 		for (i = 0; i < sk_num(context->search_attributes); i++)
sl@0: 			{
sl@0: 			key.attr_info =
sl@0: 				(STORE_ATTR_INFO *)sk_value(context->search_attributes, i);
sl@0: 			srch = sk_find_ex(store->data, (char *)&key);
sl@0: 
sl@0: 			if (srch >= 0)
sl@0: 				{
sl@0: 				context->search_index = srch;
sl@0: 				break;
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	if (context->search_index < 0)
sl@0: 		return NULL;
sl@0: 	
sl@0: 	key.attr_info =
sl@0: 		(STORE_ATTR_INFO *)sk_value(context->search_attributes,
sl@0: 			context->search_index);
sl@0: 	for(srch = context->search_index;
sl@0: 	    srch < sk_num(store->data)
sl@0: 		    && STORE_ATTR_INFO_in_range(key.attr_info,
sl@0: 			    (STORE_ATTR_INFO *)sk_value(store->data, srch))
sl@0: 		    && !(cres = STORE_ATTR_INFO_in_ex(key.attr_info,
sl@0: 				 (STORE_ATTR_INFO *)sk_value(store->data, srch)));
sl@0: 	    srch++)
sl@0: 		;
sl@0: 
sl@0: 	context->search_index = srch;
sl@0: 	if (cres)
sl@0: 		return ((struct mem_object_data_st *)sk_value(store->data,
sl@0: 				srch))->object;
sl@0: 	return NULL;
sl@0: 	}
sl@0: static int mem_list_end(STORE *s, void *handle)
sl@0: 	{
sl@0: 	struct mem_ctx_st *context = (struct mem_ctx_st *)handle;
sl@0: 
sl@0: 	if (!context)
sl@0: 		{
sl@0: 		STOREerr(STORE_F_MEM_LIST_END, ERR_R_PASSED_NULL_PARAMETER);
sl@0: 		return 0;
sl@0: 		}
sl@0: 	if (context && context->search_attributes)
sl@0: 		sk_free(context->search_attributes);
sl@0: 	if (context) OPENSSL_free(context);
sl@0: 	return 1;
sl@0: 	}
sl@0: static int mem_list_endp(STORE *s, void *handle)
sl@0: 	{
sl@0: 	struct mem_ctx_st *context = (struct mem_ctx_st *)handle;
sl@0: 
sl@0: 	if (!context
sl@0: 		|| context->search_index == sk_num(context->search_attributes))
sl@0: 		return 1;
sl@0: 	return 0;
sl@0: 	}
sl@0: static int mem_lock(STORE *s, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	return 1;
sl@0: 	}
sl@0: static int mem_unlock(STORE *s, OPENSSL_ITEM attributes[],
sl@0: 	OPENSSL_ITEM parameters[])
sl@0: 	{
sl@0: 	return 1;
sl@0: 	}
sl@0: static int mem_ctrl(STORE *s, int cmd, long l, void *p, void (*f)(void))
sl@0: 	{
sl@0: 	return 1;
sl@0: 	}