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https://github.com/VirusTotal/yara.git
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Wesley Shields
d6fc080492
* Implement text string sets.
Add support for text string sets into the grammar. They look like this:
for any s in ("a", "b"): (pe.imphash() == s)
This requires changing integer_set and integer_enumeration to just be set and
enumeration, and adding a new type (YR_ENUMERATION) that tracks the type of
enumeration (integer or otherwise) and the number of items in the enumeration.
The enumeration now checks that each type of the item in the enumeration is
consistent and will cause a compiler error if they are not. For example, this is
an error:
for any s in ("a", 0): (s)
Also, fix the build when using --with-debug-verbose option as it was missing the
assert.h include.
* Add docs and adjust constants layout.
105 lines
3.4 KiB
C
105 lines
3.4 KiB
C
/*
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Copyright (c) 2007-2013. The YARA Authors. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <assert.h>
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#include <yara/error.h>
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#include <yara/exec.h>
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#include <yara/globals.h>
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#include <yara/mem.h>
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#include <yara/proc.h>
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int _yr_process_attach(int, YR_PROC_ITERATOR_CTX*);
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int _yr_process_detach(YR_PROC_ITERATOR_CTX*);
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YR_API int yr_process_open_iterator(int pid, YR_MEMORY_BLOCK_ITERATOR* iterator)
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{
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YR_DEBUG_FPRINTF(2, stderr, "+ %s(pid=%d) {\n", __FUNCTION__, pid);
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int result = ERROR_INTERNAL_FATAL_ERROR;
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YR_PROC_ITERATOR_CTX* context = (YR_PROC_ITERATOR_CTX*) yr_malloc(
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sizeof(YR_PROC_ITERATOR_CTX));
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if (context == NULL)
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{
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result = ERROR_INSUFFICIENT_MEMORY;
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goto _exit;
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}
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iterator->context = context;
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iterator->first = yr_process_get_first_memory_block;
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iterator->next = yr_process_get_next_memory_block;
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iterator->last_error = ERROR_SUCCESS;
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// In a process scan file size is undefined, when the file_size function is
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// set to NULL the value returned by the filesize keyword is YR_UNDEFINED.
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iterator->file_size = NULL;
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context->buffer = NULL;
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context->buffer_size = 0;
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context->current_block.base = 0;
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context->current_block.size = 0;
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context->current_block.context = context;
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context->current_block.fetch_data = yr_process_fetch_memory_block_data;
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context->proc_info = NULL;
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GOTO_EXIT_ON_ERROR_WITH_CLEANUP(
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_yr_process_attach(pid, context), yr_free(context));
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result = ERROR_SUCCESS;
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_exit:
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YR_DEBUG_FPRINTF(2, stderr, "} = %d // %s()\n", result, __FUNCTION__);
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return result;
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}
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YR_API int yr_process_close_iterator(YR_MEMORY_BLOCK_ITERATOR* iterator)
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{
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YR_DEBUG_FPRINTF(2, stderr, "- %s() {}\n", __FUNCTION__);
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YR_PROC_ITERATOR_CTX* context = (YR_PROC_ITERATOR_CTX*) iterator->context;
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if (context != NULL)
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{
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_yr_process_detach(context);
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if (context->buffer != NULL)
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yr_free((void*) context->buffer);
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yr_free(context->proc_info);
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yr_free(context);
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iterator->context = NULL;
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}
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return ERROR_SUCCESS;
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}
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