二进制加密加密

#define  _CRT_SECURE_NO_WARNINGS//关闭安全检查
#include
#include

int getfilesize(char *path)
{
	FILE *pfr = fopen(path,"r");
	if (pfr == NULL)
	{
		return -1;
	}
	else
	{
		fseek(pfr, 0, SEEK_END);//指针移动到末尾
		int length = ftell(pfr);
		return length;//获取文件大小
	}
}

void copy(char *oldcpy, char *newcpy)
{
	FILE *pfr, *pfw;
	pfr = fopen(oldcpy, "rb");
	pfw = fopen(newcpy, "wb");
	if (pfr == NULL || pfw == NULL)
	{
		fclose(pfr);
		fclose(pfw);
		return;
	}
	else
	{
		int length = getfilesize(oldcpy);
		char *newchar = (char*)malloc(sizeof(char*)*length);
		fread(newchar, sizeof(char), length, pfr);//读取二进制到内存
		fwrite(newchar, sizeof(char), length, pfw);//写入二进制到文件
		fclose(pfr);
		fclose(pfw);
	}
}

void jia(char *oldpath, char *newpath)
{
	FILE *pfr, *pfw;
	pfr = fopen(oldpath, "rb");
	pfw = fopen(newpath, "wb");
	if (pfr == NULL || pfw == NULL)
	{
		fclose(pfr);
		fclose(pfw);
		return;
	}
	else
	{
		int length = getfilesize(oldpath);
		char *p = (char*)malloc(sizeof(char)*length);
		fread(p, sizeof(char), length, pfr);
		for (int i = 0; i < length; i++)
		{
			p[i] ^= 'A';
		}
		fwrite(p, sizeof(char), length, pfw);
		fclose(pfr);
		fclose(pfw);
	}
}

void jie(char *oldpath, char *jiepath)
{
	FILE *pfr = fopen(oldpath, "rb");
	FILE *pfw = fopen(jiepath, "wb");
	if (pfr == NULL || pfw == NULL)
	{
		fclose(pfr);
		fclose(pfw);
		return;
	}
	else
	{
		int length = getfilesize(oldpath);
		char *p = (char*)malloc(sizeof(char)*length);
		fread(p, sizeof(char), length, pfr);
		for (int i = 0; i < length; i++)
		{
			p[i] ^= 'A';
		}
		fwrite(p, sizeof(char), length, pfw);
		fclose(pfr);
		fclose(pfw);
	}
}