抄袭:大佬
openssl下载和qt例程:链接:https://pan.baidu.com/s/15avdzMeHgmB1qiWXB63Qow
提取码:ulja
后续追加:添加了生成二维码,链接:https://pan.baidu.com/s/1lf-6-_LRtPehdq5P2h1h4w
提取码:4sua
代码:
.pro文件添加了外部库
#-------------------------------------------------
#
# Project created by QtCreator 2022-04-14T10:20:16
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = win64OpensslTest
TEMPLATE = app
# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
CONFIG += c++11
SOURCES += \
main.cpp \
HEADERS += \
FORMS += \
INCLUDEPATH += ./openssl
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
win32: LIBS += -L$$PWD/./ -llibcrypto
INCLUDEPATH += $$PWD/.
DEPENDPATH += $$PWD/.
win32: LIBS += -L$$PWD/./ -llibssl
INCLUDEPATH += $$PWD/.
DEPENDPATH += $$PWD/.
main.c文件
#include <QApplication>
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/err.h>
#include <QDebug>
#define BEGIN_RSA_PUBLIC_KEY "BEGIN RSA PUBLIC KEY"
#define BEGIN_PUBLIC_KEY "BEGIN PUBLIC KEY"
#define KEY_LENGTH 1024 // 密钥长度
/* 生成秘钥对 */
bool createRsaKey (QString& strPubKey, QString& strPriKey);
/* 私钥加密 */
QString rsa_pri_encrypt_base64 (const QString& strClearData, const QString& strPriKey);
/* 公钥解密 */
QString rsa_pub_decrypt_base64 (const QString& strDecryptData, const QString& strPubKey);
/* 公钥加密 */
QString rsa_pub_encrypt_base64 (const QString& strClearData, const QString& strPubKey);
/* 私钥解密 */
QString rsa_pri_decrypt_base64 (const QString& strDecryptData, const QString& strPriKey);
bool createRsaKey (QString& strPubKey, QString& strPriKey)
{
RSA *pRsa = RSA_generate_key(KEY_LENGTH, RSA_3, NULL, NULL);
if ( !pRsa ){
return false;
}
BIO *pPriBio = BIO_new(BIO_s_mem());
PEM_write_bio_RSAPrivateKey(pPriBio, pRsa, NULL, NULL, 0, NULL, NULL);
BIO *pPubBio = BIO_new(BIO_s_mem());
PEM_write_bio_RSAPublicKey(pPubBio, pRsa);
// 获取长度
size_t nPriKeyLen = BIO_pending(pPriBio);
size_t nPubKeyLen = BIO_pending(pPubBio);
// 密钥对读取到字符串
char* pPriKey = new char[nPriKeyLen];
char* pPubKey = new char[nPubKeyLen];
BIO_read(pPriBio, pPriKey, nPriKeyLen);
BIO_read(pPubBio, pPubKey, nPubKeyLen);
// 存储密钥对
strPubKey = QByteArray(pPubKey, nPubKeyLen);
strPriKey = QByteArray(pPriKey, nPriKeyLen);
// 内存释放
RSA_free(pRsa);
BIO_free_all(pPriBio);
BIO_free_all(pPubBio);
delete pPriKey;
delete pPubKey;
return true;
}
QString rsa_pri_encrypt_base64 (const QString& strClearData, const QString& strPriKey)
{
QByteArray priKeyArry = strPriKey.toUtf8();
uchar* pPriKey = (uchar*)priKeyArry.data();
BIO* pKeyBio = BIO_new_mem_buf(pPriKey, strPriKey.length());
if (pKeyBio == NULL){
return "";
}
RSA* pRsa = RSA_new();
pRsa = PEM_read_bio_RSAPrivateKey(pKeyBio, &pRsa, NULL, NULL);
if ( pRsa == NULL ){
BIO_free_all(pKeyBio);
return "";
}
int nLen = RSA_size(pRsa);
char* pEncryptBuf = new char[nLen];
memset(pEncryptBuf, 0, nLen);
QByteArray clearDataArry = strClearData.toUtf8();
int nClearDataLen = clearDataArry.length();
uchar* pClearData = (uchar*)clearDataArry.data();
int nSize = RSA_private_encrypt(nClearDataLen,
pClearData,
(uchar*)pEncryptBuf,
pRsa,
RSA_PKCS1_PADDING);
QString strEncryptData = "";
if ( nSize >= 0 ){
QByteArray arry(pEncryptBuf, nSize);
strEncryptData = arry.toBase64();
}
// 释放内存
delete pEncryptBuf;
BIO_free_all(pKeyBio);
RSA_free(pRsa);
return strEncryptData;
}
QString rsa_pub_decrypt_base64(const QString& strDecryptData, const QString& strPubKey)
{
QByteArray pubKeyArry = strPubKey.toUtf8();
uchar* pPubKey = (uchar*)pubKeyArry.data();
BIO* pKeyBio = BIO_new_mem_buf(pPubKey, strPubKey.length());
if (pKeyBio == NULL){
return "";
}
RSA* pRsa = RSA_new();
if ( strPubKey.contains(BEGIN_RSA_PUBLIC_KEY) ){
pRsa = PEM_read_bio_RSAPublicKey(pKeyBio, &pRsa, NULL, NULL);
}else{
pRsa = PEM_read_bio_RSA_PUBKEY(pKeyBio, &pRsa, NULL, NULL);
}
if ( pRsa == NULL ){
BIO_free_all(pKeyBio);
return "";
}
int nLen = RSA_size(pRsa);
char* pClearBuf = new char[nLen];
memset(pClearBuf, 0, nLen);
//解密
QByteArray decryptDataArry = strDecryptData.toUtf8();
decryptDataArry = QByteArray::fromBase64(decryptDataArry);
int nDecryptDataLen = decryptDataArry.length();
uchar* pDecryptData = (uchar*)decryptDataArry.data();
int nSize = RSA_public_decrypt(nDecryptDataLen,
pDecryptData,
(uchar*)pClearBuf,
pRsa,
RSA_PKCS1_PADDING);
QString strClearData = "";
if ( nSize >= 0 ){
strClearData = QByteArray(pClearBuf, nSize);
}
// 释放内存
delete pClearBuf;
BIO_free_all(pKeyBio);
RSA_free(pRsa);
return strClearData;
}
QString rsa_pub_encrypt_base64 (const QString& strClearData, const QString& strPubKey)
{
QByteArray pubKeyArry = strPubKey.toUtf8();
uchar* pPubKey = (uchar*)pubKeyArry.data();
BIO* pKeyBio = BIO_new_mem_buf(pPubKey, pubKeyArry.length());
if (pKeyBio == NULL){
return "";
}
RSA* pRsa = RSA_new();
if ( strPubKey.contains(BEGIN_RSA_PUBLIC_KEY) ){
pRsa = PEM_read_bio_RSAPublicKey(pKeyBio, &pRsa, NULL, NULL);
}else{
pRsa = PEM_read_bio_RSA_PUBKEY(pKeyBio, &pRsa, NULL, NULL);
}
if ( pRsa == NULL ){
BIO_free_all(pKeyBio);
return "";
}
int nLen = RSA_size(pRsa);
char* pEncryptBuf = new char[nLen];
memset(pEncryptBuf, 0, nLen);
QByteArray clearDataArry = strClearData.toUtf8();
int nClearDataLen = clearDataArry.length();
uchar* pClearData = (uchar*)clearDataArry.data();
int nSize = RSA_public_encrypt(nClearDataLen,
pClearData,
(uchar*)pEncryptBuf,
pRsa,
RSA_PKCS1_PADDING);
QString strEncryptData = "";
if ( nSize >= 0 ){
QByteArray arry(pEncryptBuf, nSize);
strEncryptData = arry.toBase64();
}
// 释放内存
delete pEncryptBuf;
BIO_free_all(pKeyBio);
RSA_free(pRsa);
return strEncryptData;
}
QString rsa_pri_decrypt_base64(const QString& strDecryptData, const QString& strPriKey)
{
QByteArray priKeyArry = strPriKey.toUtf8();
uchar* pPriKey = (uchar*)priKeyArry.data();
BIO* pKeyBio = BIO_new_mem_buf(pPriKey, priKeyArry.length());
if (pKeyBio == NULL){
return "";
}
RSA* pRsa = RSA_new();
// if ( strPriKey.contains(BEGIN_RSA_PUBLIC_KEY) ){
// pRsa = PEM_read_bio_RSAPrivateKey(pKeyBio, &pRsa, NULL, NULL);
// }else{
// pRsa = PEM_read_bio_RSA_Private(pKeyBio, &pRsa, NULL, NULL);
// }
pRsa = PEM_read_bio_RSAPrivateKey(pKeyBio, &pRsa, NULL, NULL);
if ( pRsa == NULL ){
BIO_free_all(pKeyBio);
return "";
}
int nLen = RSA_size(pRsa);
char* pClearBuf = new char[nLen];
memset(pClearBuf, 0, nLen);
//解密
QByteArray decryptDataArry = strDecryptData.toUtf8();
decryptDataArry = QByteArray::fromBase64(decryptDataArry);
int nDecryptDataLen = decryptDataArry.length();
uchar* pDecryptData = (uchar*)decryptDataArry.data();
int nSize = RSA_private_decrypt(nDecryptDataLen,
pDecryptData,
(uchar*)pClearBuf,
pRsa,
RSA_PKCS1_PADDING);
QString strClearData = "";
if ( nSize >= 0 ){
strClearData = QByteArray(pClearBuf, nSize);
}
// 释放内存
delete pClearBuf;
BIO_free_all(pKeyBio);
RSA_free(pRsa);
return strClearData;
}
int main(int argc, char *argv[])
{
/**< rsa private/public key 若从文件中拷贝出来,需要注意保存元先文件格式,即换行符需要带上,包括最后一行的换行符 */
QString strPriKey = "";
QString strPubKey = "";
/**
* 用代码生成的key与openssl命令生成的key区别:
* 1、代码生成key,标题为 -----BEGIN RSA PUBLIC KEY-----,openssl命令生成key, 标题为 -----BEGIN PUBLIC KEY-----
* 2、获取RSA函数不同,代码生成key,用PEM_read_bio_RSAPublicKey,openssl命令生成key,用PEM_read_bio_RSA_PUBKEY
*/
createRsaKey(strPubKey, strPriKey);
qDebug() << "strPubKey: " << strPubKey << endl;
qDebug() << "strPriKey: " << strPriKey << endl;
QString strClear = "helloworld";
qDebug() << "private key encrypt, public key decrypt";
QString strEncryptData = rsa_pri_encrypt_base64 (strClear, strPriKey);
qDebug() << "strEncryptData: " << strEncryptData;
QString strClearData = rsa_pub_decrypt_base64 (strEncryptData, strPubKey);
qDebug() << "strClearData: " << strClearData;
qDebug() << "public key encrypt, private key decrypt";
strEncryptData = rsa_pub_encrypt_base64 (strClear, strPubKey);
qDebug() << "strEncryptData: " << strEncryptData;
strClearData = rsa_pri_decrypt_base64 (strEncryptData, strPriKey);
qDebug() << "strClearData: " << strClearData;
}
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