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scrap-is-not-scrap
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some progress in c before I move to cpp

master
JoYo 2016-07-04 16:27:30 -04:00
parent 50533d793e
commit 02a75dcd79
5 changed files with 161 additions and 157 deletions
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2
.clang-format
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@ -61,5 +61,3 @@ CommentPragmas: '^ IWYU pragma:'
ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH ] ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH ]
SpaceBeforeParens: ControlStatements SpaceBeforeParens: ControlStatements
DisableFormat: false DisableFormat: false
...

147
sins.c Normal file
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@ -0,0 +1,147 @@
#include <errno.h>
#include <malloc.h>
#include <openssl/sha.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#pragma comment(lib, "openssl/sha.lib")
#define SHA_SUM_LENGTH (SHA_DIGEST_LENGTH + SHA_DIGEST_LENGTH + 1)
int generation(char* seed_path);
int reproduce(void *pic_address, size_t pic_size);
int generation(char* seed_path)
{
int return_value = 0;
FILE *seed_handle = NULL;
struct stat pic_statistics;
void *pic_buffer = NULL;
seed_handle = fopen(seed_path, "rb");
if (NULL == seed_handle)
{
return_value = errno;
goto GEN_CLEANUP;
}
return_value = fstat(fileno(seed_handle), &pic_statistics);
if (-1 == return_value)
{
return_value = errno;
goto GEN_CLEANUP;
}
int prot = (PROT_READ | PROT_WRITE | PROT_EXEC);
int flags = (MAP_ANON | MAP_PRIVATE);
pic_buffer = mmap(NULL, pic_statistics.st_size, prot, flags, -1, 0);
if (MAP_FAILED == pic_buffer)
{
return_value = errno;
goto GEN_CLEANUP;
}
return_value = fread(pic_buffer, 1, pic_statistics.st_size, seed_handle);
if (return_value != pic_statistics.st_size)
{
return_value = errno;
goto GEN_CLEANUP;
}
if (NULL != seed_handle)
{
fclose(seed_handle);
seed_handle = NULL;
}
int (*reproduce_function)(void *, size_t) = reproduce;
void (*pic_function)(void *, size_t, void *) = pic_buffer;
pic_function(pic_buffer, pic_statistics.st_size, reproduce_function);
return_value = 1;
GEN_CLEANUP:
if (NULL != pic_buffer)
{
munmap(pic_buffer, pic_statistics.st_size);
}
if (NULL != seed_handle)
{
fclose(seed_handle);
seed_handle = NULL;
}
return return_value;
}
int reproduce(void *pic_address, size_t pic_size)
{
int return_value = 0;
char checksum[SHA_SUM_LENGTH];
unsigned char digest[SHA_DIGEST_LENGTH];
struct drand48_data drand_data;
long int mutation_value;
unsigned int mutation_offset = 0;
unsigned char pic_mutated = 0;
srand48_r(time(NULL), &drand_data);
lrand48_r(&drand_data, &mutation_value);
mutation_offset = (mutation_value % (pic_size + 1));
pic_mutated = ((unsigned char *)pic_address)[mutation_offset] & (mutation_value % 2);
((char *)pic_address)[mutation_offset] = pic_mutated;
printf("%x\t%x\n", mutation_offset, pic_mutated);
memset(checksum, 0, SHA_SUM_LENGTH);
SHA1((const unsigned char *)pic_address, pic_size, digest);
for (int iter = 0; iter < SHA_DIGEST_LENGTH; iter++)
{
sprintf(&checksum[iter * 2], "%02x", digest[iter]);
}
FILE *survived_store = fopen(checksum, "w+");
if (NULL == survived_store)
{
return_value = errno;
goto CLONE_CLEANUP;
}
return_value = fwrite(pic_address, 1, pic_size, survived_store);
if (return_value != pic_size)
{
return_value = errno;
goto CLONE_CLEANUP;
}
return_value = 1;
CLONE_CLEANUP:
if (survived_store)
{
fclose(survived_store);
}
return generation(checksum);
}
int main(int argc, const char **argv)
{
int return_value = 1;
char seed_path[SHA_SUM_LENGTH];
strncpy(seed_path, argv[1], SHA_SUM_LENGTH);
while (return_value)
{
return_value = generation(seed_path);
}
return 1;
}

144
sins.cpp
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@ -1,144 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <sysexits.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <openssl/sha.h>
#include <signal.h>
#pragma comment(lib, "openssl/sha.lib")
#define SHA_SUM_LENGTH (SHA_DIGEST_LENGTH + SHA_DIGEST_LENGTH + 1)
void picProto(void *picAddr, size_t picSize, void *clonePtr)
{
void (*cloneFunc)(void *, size_t) = clonePtr;
cloneFunc(picAddr, picSize);
return;
}
void clone(void *picAddr, size_t picSize)
{
auto retVal = EX_SOFTWARE;
struct drand48_data drand_data;
srand48_r(time(NULL), &drand_data);
long int randVal;
lrand48_r(&drand_data, &randVal);
unsigned int picOffset = (randVal % (picSize + 1));
unsigned char picFlip = ((char *)picAddr)[picOffset] & (randVal % 2);
printf("%x\t%x\n", picOffset, picFlip);
((char *)picAddr)[picOffset] = picFlip;
unsigned char digest[SHA_DIGEST_LENGTH];
SHA1(picAddr, picSize, digest);
for (int iter = 0; iter < SHA_DIGEST_LENGTH; iter++)
{
sprintf(&checksum[iter * 2], "%02x", digest[iter]);
}
FILE *fileOutHandle = fopen(checksum, "w+");
if (NULL == fileOutHandle)
{
retVal = errno;
goto CLONE_CLEANUP;
}
retVal = fwrite(picAddr, 1, picSize, fileOutHandle);
if (retVal != picSize)
{
retVal = errno;
goto CLONE_CLEANUP;
}
retVal = EX_OK;
CLONE_CLEANUP:
if (fileOutHandle)
{
fclose(fileOutHandle);
}
return;
}
int main(int argc, const char **argv)
{
auto retVal = EX_SOFTWARE;
char fileInPath[SHA_SUM_LENGTH];
char checksum[SHA_SUM_LENGTH];
FILE *fileInHandle = NULL;
struct stat picStat;
void *picBuffer = NULL;
strncpy(fileInPath, argv[1], SHA_SUM_LENGTH);
while (1)
{
fileInHandle = fopen(fileInPath, "rb");
if (NULL == fileInHandle)
{
retVal = errno;
goto MAIN_CLEANUP;
}
retVal = fstat(fileno(fileInHandle), &picStat);
if (-1 == retVal)
{
retVal = errno;
goto MAIN_CLEANUP;
}
auto mmapFlags = (PROT_READ | PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE);
picBuffer = mmap(NULL, picStat.st_size, mmapFlags, -1, 0);
if (MAP_FAILED == picBuffer)
{
retVal = errno;
goto MAIN_CLEANUP;
}
retVal = fread(picBuffer, 1, picStat.st_size, fileInHandle);
if (retVal != picStat.st_size)
{
retVal = errno;
goto MAIN_CLEANUP;
}
if (NULL != fileInHandle)
{
fclose(fileInHandle);
fileInHandle = NULL;
}
memset(checksum, 0, SHA_SUM_LENGTH);
void (*cloneFunc)(void *, size_t) = clone;
void (*picFunc)(void *, size_t, void *) = picBuffer;
picFunc(picBuffer, picStat.st_size, cloneFunc);
strncpy(fileInPath, checksum, SHA_SUM_LENGTH);
}
retVal = EX_OK;
MAIN_CLEANUP:
if (NULL != picBuffer)
{
munmap(picBuffer, picStat.st_size);
}
if (NULL != fileInHandle)
{
fclose(fileInHandle);
fileInHandle = NULL;
}
return retVal;
}

16
waf.py
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File diff suppressed because one or more lines are too long

9
wscript
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@ -1,14 +1,17 @@
#! /usr/bin/env python #! /usr/bin/env python
# encoding: utf-8 # encoding: utf-8
CC='clang'
def options(opt): def options(opt):
opt.load('nasm') opt.load('nasm')
opt.load('compiler_cxx') opt.load('compiler_c')
def configure(conf): def configure(conf):
conf.load('nasm') conf.load('nasm')
conf.load('compiler_cxx') conf.load('compiler_c')
def build(bld): def build(bld):
bld.program(source='sins.cpp', target='sins', cflags='-g') bld.program(source='sins.c', target='sins',
cflags=['-g', '-std=gnu11'],
linkflags=['-lcrypto', '-lssl'])
bld(features='asm', source='scrap.asm', target='scrap') bld(features='asm', source='scrap.asm', target='scrap')