test1

  1. 在openEuler(推荐)或Ubuntu或Windows(不推荐)中完成下面任务
  2. 使用工具(如bc,计算机器等)把自己学号转化为16进制,提交转化过程和结果截图(2‘)
  3. 使用工具(如echo -e, ultraedit等)把上面转化的结果写入二进制文件“你的学号.dat”中,并用工具od -tx1 你的学号.dat,提交命令运行(3’)
  4. 使用OpenSSL的base64命令对"你的学号.dat"进行编码解码,提交过程截图(5')
  5. 使用OpenSSL编程对"你的学号.dat"进行编码解码,提交代码和运行结果截图。(10’)

#include <openssl/evp.h>  
#include <openssl/bio.h>  
#include <openssl/buffer.h>    
#include <string>  
#include <iostream> 

using namespace std;

char * base64Encode(const char *buffer, int length, bool newLine);
char * base64Decode(char *input, int length, bool newLine);

int main(int argc, char* argv[])
{
	bool newLine = false;
	string input = "Hello World!";
	
	char * encode = base64Encode(input.c_str(), input.length(), newLine);
	char * decode = base64Decode(encode, strlen(encode), newLine);

	cout << "Base64 Encoded : " << encode << endl;
	cout << "Base64 Decoded : " << decode << endl;

	cin.get();
}

// base64 编码
char * base64Encode(const char *buffer, int length, bool newLine)
{
	BIO *bmem = NULL;
	BIO *b64 = NULL;
	BUF_MEM *bptr;

	b64 = BIO_new(BIO_f_base64());
	if (!newLine) {
		BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
	}
	bmem = BIO_new(BIO_s_mem());
	b64 = BIO_push(b64, bmem);
	BIO_write(b64, buffer, length);
	BIO_flush(b64);
	BIO_get_mem_ptr(b64, &bptr);
	BIO_set_close(b64, BIO_NOCLOSE);

	char *buff = (char *)malloc(bptr->length + 1);
	memcpy(buff, bptr->data, bptr->length);
	buff[bptr->length] = 0;
	BIO_free_all(b64);

	return buff;
}

// base64 解码
char * base64Decode(char *input, int length, bool newLine)
{
	BIO *b64 = NULL;
	BIO *bmem = NULL;
	char *buffer = (char *)malloc(length);
	memset(buffer, 0, length);
	b64 = BIO_new(BIO_f_base64());
	if (!newLine) {
		BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
	}
	bmem = BIO_new_mem_buf(input, length);
	bmem = BIO_push(b64, bmem);
	BIO_read(bmem, buffer, length);
	BIO_free_all(bmem);

	return buffer;
}

posted @ 2023-04-12 08:28  20201327刘谨铭  阅读(5)  评论(0编辑  收藏  举报