Qt使用OpenSSL

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https://github.com/mygit03/MySSL.git

MySSL.pro

#-------------------------------------------------## Project created by QtCreator 2017-06-29T14:23:26##-------------------------------------------------QT       += core gui sqlgreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = MySSLTEMPLATE = appSOURCES += main.cpp\        myssl.cppHEADERS  += myssl.hFORMS    += myssl.uiLIBS += -L"C:/OpenSSL-Win32/bin" -llibeay32LIBS += -L"C:/OpenSSL-Win32/bin" -lssleay32INCLUDEPATH += $$quote(C:/OpenSSL-Win32/include)

myssl.cpp

#include "myssl.h"#include "ui_myssl.h"#include <QDebug>#include <openssl/ssl.h>#include <openssl/aes.h>#include <QSqlQuery>#include <QSqlError>#include <QMessageBox>#define AES_BITS 128#define MSG_LEN 128char key[AES_BLOCK_SIZE];char sourceStringTemp[MSG_LEN];char dstStringTemp[MSG_LEN];MySSl::MySSl(QWidget *parent) :    QWidget(parent),    ui(new Ui::MySSl){    ui->setupUi(this);    m_db = QSqlDatabase::addDatabase("QSQLITE");    m_db.setDatabaseName("openssl.db");    if(m_db.open())    {        qDebug()<<"m_db Opened";        QSqlQuery sql_query;        QString create_sql = "create table if not exists info (src varchar(30) primary key, dst varchar(30), key varchar(30))"; //创建数据表//        QString insert_sql = "insert into info values(?,?,?)";    //插入数据//        QString select_all_sql = "select * from info";        sql_query.prepare(create_sql); //创建表        if(!sql_query.exec()) //查看创建表是否成功        {            qDebug()<<QObject::tr("Table Create failed");            qDebug()<<sql_query.lastError();        }        else        {            qDebug()<< "Table Created" ;            //插入数据//            sql_query.prepare(insert_sql);//            QVariantList GroupIDs;//            GroupIDs.append("0");//            GroupIDs.append("1");//            GroupIDs.append("2");//            QVariantList GroupNames;//            GroupNames.append("hsp");//            GroupNames.append("rl");//            GroupNames.append("spl");//            QVariantList GroupAddress;//            GroupAddress.append("南充");//            GroupAddress.append("宝鸡");//            GroupAddress.append("南充");//            sql_query.addBindValue(GroupIDs);//            sql_query.addBindValue(GroupNames);//            sql_query.addBindValue(GroupAddress);//            if(!sql_query.execBatch())//            {//                qDebug()<<sql_query.lastError();//            }//            else//            {//                qDebug()<<"插入记录成功";//            }//            //查询所有记录//            sql_query.prepare(select_all_sql);//            if(!sql_query.exec())//            {//                qDebug()<<sql_query.lastError();//            }//            else//            {//                while(sql_query.next())//                {//                    int id = sql_query.value(0).toInt();//                    QString name = sql_query.value(1).toString();//                    QString address = sql_query.value(2).toString();//                    qDebug()<<QString("ID:%1  Name:%2  Address:%3").arg(id).arg(name).arg(address);//                }//            }        }    }    m_db.close();}MySSl::~MySSl(){    delete ui;}//加密std::string MySSl::sha256(const std::string str){    char buf[2];    unsigned char hash[SHA256_DIGEST_LENGTH];    SHA256_CTX sha256;    SHA256_Init(&sha256);    SHA256_Update(&sha256, str.c_str(), str.size());    SHA256_Final(hash, &sha256);    std::string newString = "";    for(int i = 0; i < SHA256_DIGEST_LENGTH; i++)    {        sprintf(buf,"%02x",hash[i]);        newString = newString + buf;    }    return newString;}//加密int MySSl::aes_encrypt(char* in, char* key, char* out)//, int olen)可能会设置buf长度{    if(!in || !key || !out) return 0;    unsigned char iv[AES_BLOCK_SIZE];//加密的初始化向量    for(int i=0; i<AES_BLOCK_SIZE; ++i)//iv一般设置为全0,可以设置其他，但是加密解密要一样就行        iv[i]=0;    AES_KEY aes;    if(AES_set_encrypt_key((unsigned char*)key, 128, &aes) < 0)    {        return 0;    }    int len=strlen(in);//这里的长度是char*in的长度，但是如果in中间包含'\0'字符的话    //那么就只会加密前面'\0'前面的一段，所以，这个len可以作为参数传进来，记录in的长度    //至于解密也是一个道理，光以'\0'来判断字符串长度，确有不妥，后面都是一个道理。    AES_cbc_encrypt((unsigned char*)in, (unsigned char*)out, len, &aes, iv, AES_ENCRYPT);    return 1;}//解密int MySSl::aes_decrypt(char* in, char* key, char* out){    if(!in || !key || !out) return 0;    unsigned char iv[AES_BLOCK_SIZE];//加密的初始化向量    for(int i=0; i<AES_BLOCK_SIZE; ++i)//iv一般设置为全0,可以设置其他，但是加密解密要一样就行        iv[i]=0;    AES_KEY aes;    if(AES_set_decrypt_key((unsigned char*)key, 128, &aes) < 0)    {        return 0;    }    int len=strlen(in);    AES_cbc_encrypt((unsigned char*)in, (unsigned char*)out, len, &aes, iv, AES_DECRYPT);    return 1;}void MySSl::openDB(){    if(m_db.open()){        qDebug() << "m_db open success!";    }else{        qDebug() << "m_db open fail!";    }}void MySSl::closeDB(){    m_db.close();}void MySSl::on_btn_encry_clicked(){#if 0    QString tmp = ui->textEdit->toPlainText();    std::string str = tmp.toStdString();    qDebug() << "str:" << tmp;    std::string encryStr = sha256(str);    qDebug() << QString::fromStdString(encryStr);    ui->textEdit_2->setText(QString::fromStdString(encryStr));#else    QString tmp,str;    memset((char*)sourceStringTemp, 0 ,MSG_LEN);    memset((char*)dstStringTemp, 0 ,MSG_LEN);    QString text = ui->textEdit->toPlainText();    strcpy((char*)sourceStringTemp, text.toLatin1().data());//    for(int i = 0; i < 16; ++i)//可自由设置密钥//    {//        key[i] = 32 + i;//    }    QString iKey = ui->lineEdit->text();    if(iKey.isEmpty()){        QMessageBox::warning(this,tr("警告："),tr("密钥为空！"));        return;    }    strcpy((char*)key, iKey.toLatin1().data());    //加密    if(!aes_encrypt(sourceStringTemp,key,dstStringTemp))    {        printf("encrypt error\n");        return;    }    printf("enc %d:",strlen((char*)dstStringTemp));    for(int i = 0; dstStringTemp[i]; ++i){        printf("%x",(unsigned char)dstStringTemp[i]);        tmp.sprintf("%x",(unsigned char)dstStringTemp[i]);        str.append(tmp);    }    qDebug() << "dfaf:" << str;    ui->textEdit_2->setText(tr("<font size=5 color=red>%1</font>").arg(str));    QString src = ui->textEdit->toPlainText();    QString dst = dstStringTemp;    openDB();    QSqlQuery qry(m_db);    QString strSql = QString("insert into info values ('%1','%2','%3')").arg(src).arg(dst).arg(iKey);    if(!qry.exec(strSql)){        qDebug() << "insert:" << qry.lastError();    }    closeDB();#endif}void MySSl::on_textEdit_textChanged(){    ui->textEdit_2->clear();}void MySSl::on_btn_decry_clicked(){    QString iKey = ui->lineEdit->text();    if(iKey.isEmpty()){        QMessageBox::warning(this,tr("警告："),tr("密钥为空！"));        return;    }    QString strSql = QString("select * from info where key='%1'").arg(iKey);    openDB();    QSqlQuery qry(m_db);    if(!qry.exec(strSql)){        qDebug() << qry.lastError();        return;    }    QString src,dst;    if (qry.next()) {        src = qry.value(0).toString();        dst = qry.value(1).toString();    }    qDebug() << "fsdadsf:" << src << dst << iKey;    //解密    strcpy((char*)key,iKey.toLatin1().data());    memset((char*)sourceStringTemp, 0 ,MSG_LEN);    if(!aes_decrypt(dstStringTemp,key,sourceStringTemp))    {        printf("decrypt error\n");        return;    }    printf("\n");    printf("dec %d:",strlen((char*)sourceStringTemp));    printf("%s\n",sourceStringTemp);    ui->textEdit_3->setText(sourceStringTemp);    for(int i = 0; sourceStringTemp[i]; ++i){        printf("%x",(unsigned char)sourceStringTemp[i]);    }    printf("\n");}

参考教程：

Qt之OpenSSL

openssl之aes加密（源码分析 AES_encrypt 与 AES_cbc_encrypt ，加密模式）

openssl之aes加密（AES_cbc_encrypt 与 AES_encrypt 的编程案例）

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