信息安全课程设计.docx

信息安全课程设计

第一篇：信息安全课程设计信息系统安全课程设计报告课题名称：OpenSSL非对称加密提交文档学生姓名：提交文档学生学号：同组成员名单：指导教师姓名：指导教师评阅成绩：指导教师评阅意见：提交报告时间：2014年6月10日1.课程设计目标了解OpenSSL非对称加密算法的背景知识，并实现加密解密。2.分析与设计（1）实现方法：编程语言为C++语言。编程方法：根据算法要求编写代码。（2）利用OpenSSL命令制作生成密钥：#include#include#include#include#includeintmain(){charplain[256]=“啦啦啦啦啦”;charencrypted[1024];chardecrypted[1024];constchar*pub_key=“public.pem”;constchar*priv_key=“private.pem”;printf(“%sn”,plain);intlen=strlen(plain);BIO*pBio=BIO_new_file(pub_key,“r”);if(pBio==NULL){printf(“failedtoopenpub_keyfile%s!n”,pub_key);return-1;}RSA*rsa1=PEM_read_bio_RSA_PUBKEY(pBio,NULL,NULL,NULL);if(rsa1==NULL){printf(“unabletoreadpublickey!n”);return-1;}BIO_free_all(pBio);intoutlen=RSA_public_encrypt(len,(unsignedchar*)plain,(unsignedchar*)encrypted,rsa1,RSA_PKCS1_PADDING);printf(“%dn”,outlen);encrypted[outlen]='';printf(“%sn”,encrypted);FILE*fp=fopen(“out.txt”,“w”);fwrite(encrypted,1,outlen,fp);fclose(fp);pBio=BIO_new_file(priv_key,“r”);if(pBio==NULL){printf(“failedtoopenpriv_keyfile%s!n”,pub_key);return-1;}RSA*rsa2=PEM_read_bio_RSAPrivateKey(pBio,NULL,NULL,NULL);if(rsa2==NULL){printf(“unabletoreadprivatekey!n”);return-1;}BIO_free_all(pBio);outlen=RSA_private_decrypt(outlen,(unsignedchar*)encrypted,(unsignedchar*)decrypted,rsa2,RSA_PKCS1_PADDING);}（3）手动产生公钥：#include#include#include#include#includeintmain(){charplain[256]=“rtre”;charencrypted[1024];decrypted[outlen]='';printf(“%sn”,decrypted);return0;chardecrypted[1024];constchar*pub_key=“public2.pem”;constchar*priv_key=“private2.pem”;constintg_nBits=1024;printf(“%sn”,plain);intlen=strlen(plain);RSA*rsa1=RSA_generate_key(g_nBits,RSA_F4,NULL,NULL);if(rsa1==NULL){printf(“rsa_generate_keyerrorn”);return-1;}BIO*pBio=BIO_new_file(pub_key,“w”);if(pBio==NULL){printf(“BIO_new_file%serrorn”,pub_key);return-1;}PEM_write_bio_RSAPublicKey(pBio,rsa1);BIO_free_all(pBio);intoutlen=RSA_public_encrypt(len,(unsignedchar*)plain,(unsignedchar*)encrypted,rsa1,RSA_PKCS1_PADDING);printf(“%dn”,outlen);encrypted[outlen]='';printf(“%sn”,encrypted)