diff options
Diffstat (limited to 'openssl/crypto/store/str_mem.c')
| -rw-r--r-- | openssl/crypto/store/str_mem.c | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/openssl/crypto/store/str_mem.c b/openssl/crypto/store/str_mem.c new file mode 100644 index 00000000..8ac4f7e5 --- /dev/null +++ b/openssl/crypto/store/str_mem.c @@ -0,0 +1,365 @@ +/* crypto/store/str_mem.c -*- mode:C; c-file-style: "eay" -*- */ +/* Written by Richard Levitte (richard@levitte.org) for the OpenSSL + * project 2003. + */ +/* ==================================================================== + * Copyright (c) 2003 The OpenSSL Project. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 3. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@openssl.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.openssl.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include <string.h> +#include <openssl/err.h> +#include "str_locl.h" + +/* The memory store is currently highly experimental. It's meant to become + a base store used by other stores for internal caching (for full caching + support, aging needs to be added). + + The database use is meant to support as much attribute association as + possible, while providing for as small search ranges as possible. + This is currently provided for by sorting the entries by numbers that + are composed of bits set at the positions indicated by attribute type + codes. This provides for ranges determined by the highest attribute + type code value. A better idea might be to sort by values computed + from the range of attributes associated with the object (basically, + the difference between the highest and lowest attribute type code) + and it's distance from a base (basically, the lowest associated + attribute type code). +*/ + +typedef struct mem_object_data_st + { + STORE_OBJECT *object; + STORE_ATTR_INFO *attr_info; + int references; + } MEM_OBJECT_DATA; + +DECLARE_STACK_OF(MEM_OBJECT_DATA) +struct mem_data_st + { + STACK_OF(MEM_OBJECT_DATA) *data; /* sorted with + * STORE_ATTR_INFO_compare(). */ + unsigned int compute_components : 1; /* Currently unused, but can + be used to add attributes + from parts of the data. */ + }; + +DECLARE_STACK_OF(STORE_ATTR_INFO) +struct mem_ctx_st + { + int type; /* The type we're searching for */ + STACK_OF(STORE_ATTR_INFO) *search_attributes; /* Sets of + attributes to search for. Each + element is a STORE_ATTR_INFO. */ + int search_index; /* which of the search attributes we + found a match for, -1 when we still + haven't found any */ + int index; /* -1 as long as we're searching for + the first */ + }; + +static int mem_init(STORE *s); +static void mem_clean(STORE *s); +static STORE_OBJECT *mem_generate(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]); +static STORE_OBJECT *mem_get(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]); +static int mem_store(STORE *s, STORE_OBJECT_TYPES type, + STORE_OBJECT *data, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]); +static int mem_modify(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM search_attributes[], OPENSSL_ITEM add_attributes[], + OPENSSL_ITEM modify_attributes[], OPENSSL_ITEM delete_attributes[], + OPENSSL_ITEM parameters[]); +static int mem_delete(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]); +static void *mem_list_start(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]); +static STORE_OBJECT *mem_list_next(STORE *s, void *handle); +static int mem_list_end(STORE *s, void *handle); +static int mem_list_endp(STORE *s, void *handle); +static int mem_lock(STORE *s, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]); +static int mem_unlock(STORE *s, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]); +static int mem_ctrl(STORE *s, int cmd, long l, void *p, void (*f)(void)); + +static STORE_METHOD store_memory = + { + "OpenSSL memory store interface", + mem_init, + mem_clean, + mem_generate, + mem_get, + mem_store, + mem_modify, + NULL, /* revoke */ + mem_delete, + mem_list_start, + mem_list_next, + mem_list_end, + mem_list_endp, + NULL, /* update */ + mem_lock, + mem_unlock, + mem_ctrl + }; + +const STORE_METHOD *STORE_Memory(void) + { + return &store_memory; + } + +static int mem_init(STORE *s) + { + return 1; + } + +static void mem_clean(STORE *s) + { + return; + } + +static STORE_OBJECT *mem_generate(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]) + { + STOREerr(STORE_F_MEM_GENERATE, STORE_R_NOT_IMPLEMENTED); + return 0; + } +static STORE_OBJECT *mem_get(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]) + { + void *context = mem_list_start(s, type, attributes, parameters); + + if (context) + { + STORE_OBJECT *object = mem_list_next(s, context); + + if (mem_list_end(s, context)) + return object; + } + return NULL; + } +static int mem_store(STORE *s, STORE_OBJECT_TYPES type, + STORE_OBJECT *data, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]) + { + STOREerr(STORE_F_MEM_STORE, STORE_R_NOT_IMPLEMENTED); + return 0; + } +static int mem_modify(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM search_attributes[], OPENSSL_ITEM add_attributes[], + OPENSSL_ITEM modify_attributes[], OPENSSL_ITEM delete_attributes[], + OPENSSL_ITEM parameters[]) + { + STOREerr(STORE_F_MEM_MODIFY, STORE_R_NOT_IMPLEMENTED); + return 0; + } +static int mem_delete(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]) + { + STOREerr(STORE_F_MEM_DELETE, STORE_R_NOT_IMPLEMENTED); + return 0; + } + +/* The list functions may be the hardest to understand. Basically, + mem_list_start compiles a stack of attribute info elements, and + puts that stack into the context to be returned. mem_list_next + will then find the first matching element in the store, and then + walk all the way to the end of the store (since any combination + of attribute bits above the starting point may match the searched + for bit pattern...). */ +static void *mem_list_start(STORE *s, STORE_OBJECT_TYPES type, + OPENSSL_ITEM attributes[], OPENSSL_ITEM parameters[]) + { + struct mem_ctx_st *context = + (struct mem_ctx_st *)OPENSSL_malloc(sizeof(struct mem_ctx_st)); + void *attribute_context = NULL; + STORE_ATTR_INFO *attrs = NULL; + + if (!context) + { + STOREerr(STORE_F_MEM_LIST_START, ERR_R_MALLOC_FAILURE); + return 0; + } + memset(context, 0, sizeof(struct mem_ctx_st)); + + attribute_context = STORE_parse_attrs_start(attributes); + if (!attribute_context) + { + STOREerr(STORE_F_MEM_LIST_START, ERR_R_STORE_LIB); + goto err; + } + + while((attrs = STORE_parse_attrs_next(attribute_context))) + { + if (context->search_attributes == NULL) + { + context->search_attributes = + sk_STORE_ATTR_INFO_new(STORE_ATTR_INFO_compare); + if (!context->search_attributes) + { + STOREerr(STORE_F_MEM_LIST_START, + ERR_R_MALLOC_FAILURE); + goto err; + } + } + sk_STORE_ATTR_INFO_push(context->search_attributes,attrs); + } + if (!STORE_parse_attrs_endp(attribute_context)) + goto err; + STORE_parse_attrs_end(attribute_context); + context->search_index = -1; + context->index = -1; + return context; + err: + if (attribute_context) STORE_parse_attrs_end(attribute_context); + mem_list_end(s, context); + return NULL; + } +static STORE_OBJECT *mem_list_next(STORE *s, void *handle) + { + int i; + struct mem_ctx_st *context = (struct mem_ctx_st *)handle; + struct mem_object_data_st key = { 0, 0, 1 }; + struct mem_data_st *store = + (struct mem_data_st *)STORE_get_ex_data(s, 1); + int srch; + int cres = 0; + + if (!context) + { + STOREerr(STORE_F_MEM_LIST_NEXT, ERR_R_PASSED_NULL_PARAMETER); + return NULL; + } + if (!store) + { + STOREerr(STORE_F_MEM_LIST_NEXT, STORE_R_NO_STORE); + return NULL; + } + + if (context->search_index == -1) + { + for (i = 0; + i < sk_STORE_ATTR_INFO_num(context->search_attributes); + i++) + { + key.attr_info + = sk_STORE_ATTR_INFO_value(context->search_attributes, + i); + srch = sk_MEM_OBJECT_DATA_find_ex(store->data, &key); + + if (srch >= 0) + { + context->search_index = srch; + break; + } + } + } + if (context->search_index < 0) + return NULL; + + key.attr_info = + sk_STORE_ATTR_INFO_value(context->search_attributes, + context->search_index); + for(srch = context->search_index; + srch < sk_MEM_OBJECT_DATA_num(store->data) + && STORE_ATTR_INFO_in_range(key.attr_info, + sk_MEM_OBJECT_DATA_value(store->data, srch)->attr_info) + && !(cres = STORE_ATTR_INFO_in_ex(key.attr_info, + sk_MEM_OBJECT_DATA_value(store->data, srch)->attr_info)); + srch++) + ; + + context->search_index = srch; + if (cres) + return (sk_MEM_OBJECT_DATA_value(store->data, srch))->object; + return NULL; + } +static int mem_list_end(STORE *s, void *handle) + { + struct mem_ctx_st *context = (struct mem_ctx_st *)handle; + + if (!context) + { + STOREerr(STORE_F_MEM_LIST_END, ERR_R_PASSED_NULL_PARAMETER); + return 0; + } + if (context && context->search_attributes) + sk_STORE_ATTR_INFO_free(context->search_attributes); + if (context) OPENSSL_free(context); + return 1; + } +static int mem_list_endp(STORE *s, void *handle) + { + struct mem_ctx_st *context = (struct mem_ctx_st *)handle; + + if (!context + || context->search_index + == sk_STORE_ATTR_INFO_num(context->search_attributes)) + return 1; + return 0; + } +static int mem_lock(STORE *s, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]) + { + return 1; + } +static int mem_unlock(STORE *s, OPENSSL_ITEM attributes[], + OPENSSL_ITEM parameters[]) + { + return 1; + } +static int mem_ctrl(STORE *s, int cmd, long l, void *p, void (*f)(void)) + { + return 1; + } |