对套接字使用AES\u ctr128\u加密时出现SIGSEGV错误
当我试图使用AES\u ctr128\u encrypt加密文件的数据时,我得到了SIGBUS错误。在这里,我使用对套接字使用AES\u ctr128\u加密时出现SIGSEGV错误,c,sockets,encryption,openssl,C,Sockets,Encryption,Openssl,当我试图使用AES\u ctr128\u encrypt加密文件的数据时,我得到了SIGBUS错误。在这里,我使用read()函数将数据从文件读取到bufptr[32k],每次读取32k块。对于每个数据块,我只想使用AES\u ctr128\u encrypt(bufptr+200、outdata、bytes\u encrypt和key、state.ivec、state.ecoount和state.num)加密部分数据仅加密所需的数据,然后再次将其发送到服务器,然后再次解密并添加到缓冲区。有人能
read()
函数将数据从文件读取到bufptr[32k]
,每次读取32k块。对于每个数据块,我只想使用AES\u ctr128\u encrypt(bufptr+200、outdata、bytes\u encrypt和key、state.ivec、state.ecoount和state.num)加密部分数据代码>仅加密所需的数据,然后再次将其发送到服务器,然后再次解密并添加到缓冲区。有人能帮我解决这个问题吗?提前谢谢
第一个客户端能够将文件大小发送到服务器,当它到达AES\u ctr128\u encrypt()
时,我得到分段错误(内核转储),gdb说它是SIGSEGV
我的头文件
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <malloc.h>
#include <string.h>
#include <sys/socket.h>
#include <resolv.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/sendfile.h>
#include <pthread.h>
#include <sys/syscall.h>
#include <openssl/ssl.h>
#include <openssl/err.h>
#include <sys/time.h>
#include <openssl/aes.h>
#include <openssl/rand.h>
#include <openssl/modes.h>
#include <openssl/crypto.h>
#define FAIL -1
#define SEGMENT_SIZE 32768
#define j 10
#define OUT1 AES_BLOCK_SIZE
#define BYTES_ENCRYPT AES_BLOCK_SIZE
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#定义失败-1
#定义段_大小32768
#定义j 10
#定义OUT1 AES\u块大小
#定义字节\u加密AES\u块\u大小
我的客户程序
#include "headers.h"
#define FILE "/tmp/book"
struct ctr_state {
unsigned char ivec[AES_BLOCK_SIZE];
unsigned int num;
unsigned char ecount[AES_BLOCK_SIZE];
};
int init_ctr(struct ctr_state *state, const unsigned char iv[8])
{
/* aes_ctr128_encrypt requires 'num' and 'ecount' set to zero on the
* first call. */
state->num = 0;
memset(state->ecount, 0, 16);
/* Initialise counter in 'ivec' to 0 */
memset(state->ivec + 16, 0, 16);
/* Copy IV into 'ivec' */
memcpy(state->ivec, iv, 16);
}
int main(int argc, char* argv[])
{
size_t count;
AES_KEY key;
unsigned char ckey[] = "/home/nandan/aes.key";
unsigned char iv[AES_BLOCK_SIZE];
struct ctr_state state;
// validate proper usage
if (argc != 3)
{
fprintf(stderr, "Usage: %s <serverIP> <serverPort>\n", argv[0]);
exit(-1);
}
// store the command line arguments
char *server_ip = argv[1];
int server_port = htons(atoi(argv[2]));
// stores address of remote server to connect
struct sockaddr_in server_addr;
int fd, option;
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd == -1)
{
fprintf(stderr, "Error creating socket\n");
exit(-1);
}
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(server_ip);
server_addr.sin_port = server_port;
if (connect(fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) == -1)
{
fprintf(stderr, "Error connecting to server\n");
exit(-1);
}
struct stat stats;
stat("/tmp/book", &stats);
int size = stats.st_size;
// send size of file to the client
send(fd, &size, sizeof(int),0);
printf("Written \n");
unsigned char outdata[OUT1];
in = open (FILE, O_RDONLY);
to_read = size;
char *bufptr = malloc(SEGMENT_SIZE);
do
{
n = read (in, bufptr, SEGMENT_SIZE);
if(n < 0)
{
perror("Read Error:");
}
init_ctr(&state, iv);
AES_ctr128_encrypt(bufptr+200, outdata, BYTES_ENCRYPT, &key, state.ivec, state.ecount, &state.num);
memcpy(bufptr+200,outdata,BYTES_ENCRYPT);
sending = send(fd, bufptr, n,0);
to_read = to_read-n;
} while (to_read != 0);
close(fd);
}
#包括“headers.h”
#定义文件“/tmp/book”
结构中心状态{
无符号字符ivec[AES_块大小];
无符号整数;
无符号字符计数[AES_块大小];
};
int init_ctr(struct ctr_state*state,const unsigned char iv[8])
{
/*aes\u ctr128\u encrypt要求将服务器上的“num”和“ecoount”设置为零
*第一个电话*/
状态->数值=0;
memset(state->ecount,0,16);
/*将“ivec”中的计数器初始化为0*/
memset(状态->ivec+16,0,16);
/*将IV复制到“ivec”*/
memcpy(州->ivec,iv,16);
}
int main(int argc,char*argv[])
{
大小/数量;
AES_密钥;
无符号字符ckey[]=“/home/nandan/aes.key”;
无符号字符iv[AES_块大小];
结构中心状态;
//验证正确使用
如果(argc!=3)
{
fprintf(stderr,“用法:%s\n”,argv[0]);
出口(-1);
}
//存储命令行参数
char*server_ip=argv[1];
int server_port=htons(atoi(argv[2]);
//存储要连接的远程服务器的地址
服务器地址中的结构sockaddr\u;
int-fd,选项;
fd=套接字(AF_INET,SOCK_STREAM,0);
如果(fd==-1)
{
fprintf(stderr,“创建套接字时出错\n”);
出口(-1);
}
memset(&server_addr,0,sizeof(server_addr));
服务器地址sin家庭=AF网络;
server\u addr.sin\u addr.s\u addr=inet\u addr(服务器ip);
server\u addr.sin\u port=服务器\u端口;
if(connect(fd,(struct sockaddr*)和server_addr,sizeof(server_addr))=-1)
{
fprintf(stderr,“连接到服务器时出错”);
出口(-1);
}
结构统计;
stat(“/tmp/book”、&stats);
int size=stats.st_size;
//将文件大小发送到客户端
发送(fd、大小、大小(int)、0);
printf(“书面的”);
无符号字符outdata[OUT1];
in=打开(仅文件);
to_read=大小;
char*bufptr=malloc(段大小);
做
{
n=读取(英寸,bufptr,段大小);
if(n<0)
{
perror(“读取错误:”);
}
初始中心(和状态,iv);
AES加密(bufptr+200、outdata、字节加密和密钥、state.ivec、state.ecoount和state.num);
memcpy(bufptr+200,输出数据,字节加密);
发送=发送(fd,bufptr,n,0);
to_read=to_read-n;
}while(to_read!=0);
关闭(fd);
}
我的服务器程序
#include "headers.h"
struct ctr_state {
unsigned char ivec[16];
unsigned int num;
unsigned char ecount[16];
};
int init_ctr(struct ctr_state *state, const unsigned char iv[8])
{
/* aes_ctr128_encrypt requires 'num' and 'ecount' set to zero on the
* first call. */
state->num = 0;
memset(state->ecount, 0, 16);
/* Initialise counter in 'ivec' to 0 */
memset(state->ivec + 8, 0, 8);
/* Copy IV into 'ivec' */
memcpy(state->ivec, iv, 8);
}
int main(int argc, char* argv[])
{
size_t count;
AES_KEY key;
unsigned char ckey[] = "/home/nandan/aes.key";
unsigned char iv[AES_BLOCK_SIZE];
struct ctr_state state;
// validate proper usage
if (argc != 4)
{
fprintf(stderr, "Usage %s <serverBindIP> <serverBindPort> <CredentialsFilePath>\n", argv[0]);
exit(-1);
}
int server;
char* ip = argv[1];
int port = htons(atoi(argv[2]));
char* passwd_file = argv[3];
struct sockaddr_in server_addr, client_addr;
clock_t start, end;
double cpu_time_used, timer = 0;
int server_fd, client_fd, result;
socklen_t length;
// Create an internet domain TCP socket
server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server_fd == -1)
{
fprintf(stderr, "Unable to create socket\n");
exit(-1);
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = port;
server_addr.sin_addr.s_addr = inet_addr(ip);
// bind socket to an network interface
result = bind(server_fd, (struct sockaddr*) &server_addr, sizeof(server_addr));
if (result == -1)
{
fprintf(stderr, "Unable to bind socket\n");
exit(-1);
}
// mark the socket used for incoming requests
listen(server_fd, 5);
// accept an incoming connection
printf("Waiting for incoming connection\n");
length = sizeof(client_addr);
client_fd = accept(server_fd, (struct sockaddr*) &client_addr, &length);/* accept connection as usual */
if (client_fd == -1)
{
fprintf(stderr, "Unable to accept peer connection\n");
exit(-1);
}
printf("Connection: %s:%d\n",inet_ntoa(client_addr.sin_addr), ntohs(client_addr.sin_port));
int tmp = 0,i,size = 0; // read file size first
unsigned char outdata[OUT1];
recv(client_fd, &size, sizeof(int),0);
printf("%d \n", size);
int bytes_read = 0;
int to_read = size;
printf("%d \n", size);
FILE* out = fopen("/tmp/x1.pdf", "wb");
char *buffer = malloc(SEGMENT_SIZE);
do
{
bytes_read = recv(client_fd, buffer, sizeof(buffer),0);
init_ctr(&state, iv);
AES_ctr128_encrypt(buffer+200, outdata, BYTES_ENCRYPT, &key, state.ivec, state.ecount, &state.num);
memcpy(buffer+200, outdata, BYTES_ENCRYPT);
tmp = tmp + bytes_read;
// save content to disk
fwrite(buffer, 1, bytes_read, out);
} while (tmp != size);
close(client_fd); /* close socket */
return 0;
}
#包括“headers.h”
结构中心状态{
无符号字符ivec[16];
无符号整数;
无符号字符计数[16];
};
int init_ctr(struct ctr_state*state,const unsigned char iv[8])
{
/*aes\u ctr128\u encrypt要求将服务器上的“num”和“ecoount”设置为零
*第一个电话*/
状态->数值=0;
memset(state->ecount,0,16);
/*将“ivec”中的计数器初始化为0*/
memset(状态->ivec+8,0,8);
/*将IV复制到“ivec”*/
memcpy(州->ivec,iv,8);
}
int main(int argc,char*argv[])
{
大小/数量;
AES_密钥;
无符号字符ckey[]=“/home/nandan/aes.key”;
无符号字符iv[AES_块大小];
结构中心状态;
//验证正确使用
如果(argc!=4)
{
fprintf(stderr,“用法%s\n”,argv[0]);
出口(-1);
}
int服务器;
char*ip=argv[1];
int port=htons(atoi(argv[2]);
char*passwd_file=argv[3];
服务器地址、客户端地址中的结构sockaddr\u;
时钟开始、结束;
使用双cpu时间,计时器=0;
int server_fd、client_fd、result;
袜子长度;
//创建internet域TCP套接字
服务器\u fd=socket(AF\u INET,SOCK\u STREAM,0);
如果(服务器\u fd==-1)
{
fprintf(stderr,“无法创建套接字”\n);
出口(-1);
}
服务器地址sin家庭=AF网络;
服务器地址sin端口=端口;
服务器地址sin地址s地址=inet地址(ip);
//将套接字绑定到网络接口
结果=绑定(server_fd,(struct sockaddr*)和server_addr,sizeof(server_addr));
如果(结果==-1)
{
fprintf(stderr,“无法绑定套接字”\n);
出口(-1);
}
//标记用于传入请求的套接字
听(服务器\u fd,5);
//接受传入连接
printf(“等待传入连接”);
长度=sizeof(客户地址);
client_fd=accept(server_fd,(struct sockaddr*)和client_addr,&length);/*像往常一样接受连接*/
如果(客户端\u fd==-1)
{
fprintf(stderr,“无法接受对等连接”);
出口(-1);
}
printf(“连接:%s:%d\n”、inet\u ntoa(客户端地址sin\u addr)、ntohs(客户端地址sin\u端口));
int tmp=0,i,size=0;//首先读取文件大小
无符号字符outdata[OUT1];
recv(客户的fd和尺寸,尺寸(整数),0);
printf(“%d\n”,大小);
int bytes_read=0;
int to_read=大小;
printf(“%d\n”,大小);
文件*out=fopen(“/tmp/x1.pdf”,“wb”);
char*buffer=malloc(段大小);
做
{
字节读取=recv(客户机fd,缓冲区,sizeof(缓冲区),0);
初始中心(和状态,iv);
AES加密(缓冲区+200、输出数据、字节加密和密钥、state.ivec、state.ecoount和state.num);
memcpy(缓冲区+200,输出数据,字节加密);
tmp=tmp+字节\u读取;