104 lines
4.2 KiB
C++
104 lines
4.2 KiB
C++
/**
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* Copyright 2021 BrutalWizard (https://github.com/bru74lw1z4rd). All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution
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**/
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#ifndef QRSA_H
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#define QRSA_H
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#include "QSimpleCrypto_global.h"
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#include <QFile>
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#include <QObject>
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#include <memory>
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#include <openssl/err.h>
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#include <openssl/pem.h>
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#include <openssl/rsa.h>
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#include "QCryptoError.h"
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// clang-format off
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namespace QSimpleCrypto
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{
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class QSIMPLECRYPTO_EXPORT QRsa {
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#define PublicEncrypt 0
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#define PrivateEncrypt 1
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#define PublicDecrypt 2
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#define PrivateDecrypt 3
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public:
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QRsa();
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///
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/// \brief generateRsaKeys - Function generate Rsa Keys and returns them in OpenSSL structure.
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/// \param bits - RSA key size.
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/// \param rsaBigNumber - The exponent is an odd number, typically 3, 17 or 65537.
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/// \return Returns 'OpenSSL RSA structure' or 'nullptr', if error happened. Returned value must be cleaned up with 'RSA_free()' to avoid memory leak.
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///
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RSA* generateRsaKeys(const int& bits, const int& rsaBigNumber);
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///
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/// \brief savePublicKey - Saves to file RSA public key.
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/// \param rsa - OpenSSL RSA structure.
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/// \param publicKeyFileName - Public key file name.
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///
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void savePublicKey(RSA *rsa, const QByteArray& publicKeyFileName);
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///
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/// \brief savePrivateKey - Saves to file RSA private key.
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/// \param rsa - OpenSSL RSA structure.
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/// \param privateKeyFileName - Private key file name.
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/// \param password - Private key password.
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/// \param cipher - Can be used with 'OpenSSL EVP_CIPHER' (ecb, cbc, cfb, ofb, ctr) - 128, 192, 256. Example: EVP_aes_256_cbc().
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///
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void savePrivateKey(RSA* rsa, const QByteArray& privateKeyFileName, QByteArray password = "", const EVP_CIPHER* cipher = nullptr);
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///
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/// \brief getPublicKeyFromFile - Gets RSA public key from a file.
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/// \param filePath - File path to public key file.
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/// \return Returns 'OpenSSL EVP_PKEY structure' or 'nullptr', if error happened. Returned value must be cleaned up with 'EVP_PKEY_free()' to avoid memory leak.
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///
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EVP_PKEY* getPublicKeyFromFile(const QByteArray& filePath);
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///
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/// \brief getPrivateKeyFromFile - Gets RSA private key from a file.
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/// \param filePath - File path to private key file.
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/// \param password - Private key password.
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/// \return - Returns 'OpenSSL EVP_PKEY structure' or 'nullptr', if error happened. Returned value must be cleaned up with 'EVP_PKEY_free()' to avoid memory leak.
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///
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EVP_PKEY* getPrivateKeyFromFile(const QByteArray& filePath, const QByteArray& password = "");
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///
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/// \brief encrypt - Encrypt data with RSA algorithm.
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/// \param plaintext - Text that must be encrypted.
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/// \param rsa - OpenSSL RSA structure.
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/// \param encryptType - Public or private encrypt type. (PUBLIC_ENCRYPT, PRIVATE_ENCRYPT).
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/// \param padding - OpenSSL RSA padding can be used with: 'RSA_PKCS1_PADDING', 'RSA_NO_PADDING' and etc.
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/// \return Returns encrypted data or "", if error happened.
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///
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QByteArray encrypt(QByteArray plainText, RSA* rsa, const int& encryptType = PublicEncrypt, const int& padding = RSA_PKCS1_PADDING);
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///
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/// \brief decrypt - Decrypt data with RSA algorithm.
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/// \param cipherText - Text that must be decrypted.
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/// \param rsa - OpenSSL RSA structure.
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/// \param decryptType - Public or private type. (PUBLIC_DECRYPT, PRIVATE_DECRYPT).
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/// \param padding - RSA padding can be used with: 'RSA_PKCS1_PADDING', 'RSA_NO_PADDING' and etc.
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/// \return - Returns decrypted data or "", if error happened.
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///
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QByteArray decrypt(QByteArray cipherText, RSA* rsa, const int& decryptType = PrivateDecrypt, const int& padding = RSA_PKCS1_PADDING);
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///
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/// \brief error - Error handler class.
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///
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QCryptoError error;
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};
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} // namespace QSimpleCrypto
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#endif // QRSA_H
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