113 lines
2.4 KiB
C
113 lines
2.4 KiB
C
#include <stdio.h>
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#include <time.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <string.h>
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#include <errno.h>
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#include <sysexits.h>
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#include <openssl/sha.h>
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#pragma comment(lib, "openssl/sha.lib")
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char *picProto(void *picAddr, size_t picSize, void *clonePtr) {
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char *(*cloneFunc)(void *, size_t) = clonePtr;
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return cloneFunc(picAddr, picSize);
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}
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char *clone(void *picAddr, size_t picSize) {
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auto retVal = EX_SOFTWARE;
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srand((unsigned int)time(NULL));
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unsigned int picOffset = (rand() % (picSize + 1));
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((char *)picAddr)[picOffset] = ((char *)picAddr)[picOffset] & (rand() % 1);
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unsigned char *digest = NULL;
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SHA_CTX sha;
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SHA1_Init(&sha);
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SHA1_Update(&sha, picAddr, picSize);
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SHA1_Final(digest, &sha);
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char *fileOutPath = NULL;
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sprintf(fileOutPath, "./%s_%x.bin", digest, rand());
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FILE *fileOutHandle = fopen(fileOutPath, "wb");
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if (NULL == fileOutHandle) {
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retVal = EX_SOFTWARE;
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goto CLONE_CLEANUP;
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}
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retVal = fwrite(picAddr, 1, picSize, fileOutHandle);
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if (retVal != picSize) {
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retVal = EX_SOFTWARE;
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goto CLONE_CLEANUP;
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}
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retVal = EX_OK;
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CLONE_CLEANUP:
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if (fileOutHandle) {
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fclose(fileOutHandle);
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}
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return fileOutPath;
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}
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int main(int argc, const char **argv) {
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auto retVal = EX_SOFTWARE;
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char *fileInPath = argv[1];
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FILE *fileInHandle = fopen(fileInPath, "rb");
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if (NULL == fileInHandle) {
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retVal = EX_SOFTWARE;
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goto MAIN_CLEANUP;
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}
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fseek(fileInHandle, 0L, SEEK_END);
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size_t picBuffer_len = ftell(fileInHandle);
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fseek(fileInHandle, 0L, SEEK_SET);
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if (0 >= picBuffer_len) {
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retVal = EX_SOFTWARE;
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goto MAIN_CLEANUP;
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}
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void *picBuffer = malloc(picBuffer_len);
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if (NULL == picBuffer) {
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retVal = EX_SOFTWARE;
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goto MAIN_CLEANUP;
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}
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memset(&picBuffer, 0, picBuffer_len);
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retVal = mprotect(picBuffer, picBuffer_len, PROT_EXEC);
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if (0 == retVal) {
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retVal = EX_SOFTWARE;
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goto MAIN_CLEANUP;
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}
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retVal = fread(picBuffer, 1, picBuffer_len, fileInHandle);
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if (retVal != picBuffer_len) {
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retVal = EX_SOFTWARE;
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goto MAIN_CLEANUP;
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}
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if (fileInHandle) {
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fclose(fileInHandle);
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}
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char *(*cloneFunc)(void *, size_t) = clone;
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void *(*picFunc)(void *, size_t, void *) = picBuffer;
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char *childPath = picFunc(picBuffer, picBuffer_len, cloneFunc);
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retVal = EX_OK;
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MAIN_CLEANUP:
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if (fileInHandle) {
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fclose(fileInHandle);
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}
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if (picBuffer) {
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free(picBuffer);
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}
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return retVal;
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}
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