我尝试运行用于计算burmester desmedt密钥协议的分布式应用程序。
执行此操作的代码如下：
#include "mpi.h"
#include <stdio.h>
// Openssl
#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/err.h>
// Custom
#include "message.h"
#include "dh.h"
void cleanup(DH *secret);
void cleanup(DH *secret) {
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
OPENSSL_free(secret);
ERR_free_strings();
}
int main(int argc, char *argv[]) {
int rank, size;
MPI_Init( &argc, &argv );
MPI_Comm_rank( MPI_COMM_WORLD, &rank );
MPI_Comm_size( MPI_COMM_WORLD, &size );
/* Load the human readable error strings for libcrypto */
ERR_load_crypto_strings();
/* Load all digest and cipher algorithms */
OpenSSL_add_all_algorithms();
/* Load config file, and other important initialisation */
OPENSSL_config(NULL);
DH *secret;
printf("RANK %d, Generating Diffie Hellman Keys\n", rank);
fflush(stdout);
if(-1 == generateKeys(secret)) {
cleanup(secret);
fprintf(stderr, "RANK %d, Failed to intialize key\n",rank);
fflush(stderr);
return -1;
}
printf("RANK %d, Keys generated\n",rank);
fflush(stdout);
// Set up Barrier for cpommunications
MPI_Barrier(MPI_COMM_WORLD);
printf("RANK %d, Publishing Keys\n", rank);
fflush(stdout);
if(secret == NULL) {
cleanup(secret);
fprintf(stderr, "RANK %d, Error on Generating the Diffie Hellman\n",rank);
fflush(stderr);
return -1;
}
if(MPIbcastBigNum(secret->pub_key, rank, "Publishing Public Key") == -1){
cleanup(secret);
return -1;
}
/*Cleanup */
cleanup(secret);
MPI_Finalize();
return 0;
}
还有一些用于初始化DH和消息传递的辅助方法（为了节省空间，我通过链接发布了代码）：
Diffie Hellman：https://github.com/pc-magas/burmester-desmedt/blob/master/dh.c
消息：https://github.com/pc-magas/burmester-desmedt/blob/master/message.c
我也通过此Makefile进行编译。所以我想知道为什么我的以下执行会变成段错误？
mpirun -np 3 ./builds/main
RANK 1, Generating Diffie Hellman Keys
RANK 2, Generating Diffie Hellman Keys
RANK 0, Generating Diffie Hellman Keys
RANK 1, Keys generated
RANK 2, Keys generated
RANK 0, Keys generated
RANK 2, Publishing Keys
[pcmagas-System-Product-Name:19304] *** Process received signal ***
[pcmagas-System-Product-Name:19304] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19304] Signal code: (128)
[pcmagas-System-Product-Name:19304] Failing at address: (nil)
[pcmagas-System-Product-Name:19304] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f485819c390]
[pcmagas-System-Product-Name:19304] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7f485873acfd]
[pcmagas-System-Product-Name:19304] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19304] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19304] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f4857de1830]
[pcmagas-System-Product-Name:19304] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19304] *** End of error message ***
RANK 1, Publishing Keys
[pcmagas-System-Product-Name:19303] *** Process received signal ***
[pcmagas-System-Product-Name:19303] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19303] Signal code: (128)
[pcmagas-System-Product-Name:19303] Failing at address: (nil)
[pcmagas-System-Product-Name:19303] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7f2e56b90390]
[pcmagas-System-Product-Name:19303] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7f2e5712ecfd]
[pcmagas-System-Product-Name:19303] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19303] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19303] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f2e567d5830]
[pcmagas-System-Product-Name:19303] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19303] *** End of error message ***
RANK 0, Publishing Keys
[pcmagas-System-Product-Name:19302] *** Process received signal ***
[pcmagas-System-Product-Name:19302] Signal: Segmentation fault (11)
[pcmagas-System-Product-Name:19302] Signal code: (128)
[pcmagas-System-Product-Name:19302] Failing at address: (nil)
[pcmagas-System-Product-Name:19302] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fd967a55390]
[pcmagas-System-Product-Name:19302] [ 1] /lib/x86_64-linux-gnu/libcrypto.so.1.0.0(BN_num_bits+0x1d)[0x7fd967ff3cfd]
[pcmagas-System-Product-Name:19302] [ 2] ./builds/main[0x401461]
[pcmagas-System-Product-Name:19302] [ 3] ./builds/main[0x40127b]
[pcmagas-System-Product-Name:19302] [ 4] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fd96769a830]
[pcmagas-System-Product-Name:19302] [ 5] ./builds/main[0x400ff9]
[pcmagas-System-Product-Name:19302] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 19304 on node pcmagas-System-Product-Name exited on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
Makefile:16: recipe for target 'run' failed
make: *** [run] Error 139
DH对象是否以某种方式被覆盖（据我所知，fas OpenSSL并非线程和进程安全的，我尝试通过单独的进程运行它）。 最佳答案
有时最好在任何函数上（最好在main上）创建DH对象。
在您的实现中，是在dh.c文件中的以下函数中创建的：
int generateKeys(DH *encryptionInfo) {
int codes;
if(NULL == (encryptionInfo = DH_new())) return -1;
if(1 != DH_generate_parameters_ex(encryptionInfo, 2048, DH_GENERATOR_2, NULL)) return -1;
if(1 != DH_check(encryptionInfo, &codes)) return -1;
if(codes != 0) return -1;
if(1 != DH_generate_key(encryptionInfo)) return -1;
return 0;
}
因此，ti可能会导致
encryptionInfo使用无效的地址，因此，我建议将以下代码移至主要地址： if(NULL == (encryptionInfo = DH_new())) return -1;
关于c - MPI和变量覆盖？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/54371045/