124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
/*! @file picrypt.h
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* @brief Cryptographic class using lib Sodium
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*/
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/*
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PIP - Platform Independent Primitives
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Cryptographic class using lib Sodium
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Andrey Bychkov work.a.b@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PICRYPT_H
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#define PICRYPT_H
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#include "pip_crypt_export.h"
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#include "pistring.h"
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class PIP_CRYPT_EXPORT PICrypt {
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public:
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//! Construct and generate random key
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PICrypt();
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//! Set key to "key", key size must be a \a sizeKey()
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bool setKey(const PIByteArray & key);
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//! Generate and set key from keyphrase "secret"
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PIByteArray setKey(const PIString & secret);
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//! Returns current key
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PIByteArray key() {return key_;}
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//! Encrypt given data "data", result size will be increased by \a sizeCrypt()
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PIByteArray crypt(const PIByteArray & data);
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//! Decrypt given data "crypt_data"
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PIByteArray decrypt(const PIByteArray & crypt_data, bool * ok = 0);
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//! Encrypt given data "data" with key "key", result size will be increased by \a sizeCrypt()
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static PIByteArray crypt(const PIByteArray & data, PIByteArray key);
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//! Decrypt given data "crypt_data" with key "key"
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static PIByteArray decrypt(const PIByteArray & crypt_data, PIByteArray key, bool * ok = 0);
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//! Generate hash from keyphrase "secret", may be used as a key for encryption
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static PIByteArray hash(const PIString & secret);
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//! Generate hash from bytearray
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static PIByteArray hash(const PIByteArray & data);
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//! Generate hash from bytearray
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static PIByteArray hash(const PIByteArray & data, const unsigned char * key, size_t keylen);
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//! Returns hash size
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static size_t sizeHash();
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//! Generate short hash from string "s", may be used for hash table
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static ullong shorthash(const PIString & s, PIByteArray key = PIByteArray());
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//! Generate random key
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static PIByteArray generateKey();
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//! Generate random buffer
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static PIByteArray generateRandomBuff(int size);
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//! Returns key size
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static size_t sizeKey();
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//! Returns size which be added to data size in encryption process
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static size_t sizeCrypt();
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//! Function randomly generates a secret key and a corresponding public key for digital signature
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static void generateSignKeys(PIByteArray & public_key, PIByteArray & secret_key);
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//! Function generates a secret key from input data and a corresponding public key for digital signature
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static void generateSignKeys(PIByteArray & public_key, PIByteArray & secret_key, const PIByteArray & seed);
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//! Function extract sign public key from sing secret key
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static PIByteArray extractSignPublicKey(const PIByteArray & secret_key);
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//! Calculate digital signature for data
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PIByteArray signMessage(const PIByteArray & data, PIByteArray secret_key);
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//! Verify digital signature of signed message
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bool verifySign(const PIByteArray & data, const PIByteArray & signature, PIByteArray public_key);
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//! Function randomly generates a secret key and a corresponding public key for authenticated encryption
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static void generateKeypair(PIByteArray & public_key, PIByteArray & secret_key);
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//! Function generates a secret key from input data and a corresponding public key for authenticated encryption
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static void generateKeypair(PIByteArray & public_key, PIByteArray & secret_key, const PIByteArray & seed);
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//! Encrypt given data "data"
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PIByteArray crypt(const PIByteArray &data, const PIByteArray & public_key, const PIByteArray & secret_key);
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//! Decrypt given data "crypt_data"
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PIByteArray decrypt(const PIByteArray & crypt_data, const PIByteArray & public_key, const PIByteArray & secret_key, bool * ok = 0);
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//! Generate password hash from "password"
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static PIByteArray passwordHash(const PIString & password, const PIByteArray & seed);
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//! Returns libsodium version
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static PIString version();
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private:
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static bool init();
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PIByteArray nonce_, key_;
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};
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#endif // PICRYPT_H
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