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/* crypto_wrapper.hpp
*
* Copyright (C) 2003 Sawtooth Consulting Ltd.
*
* This file is part of yaSSL.
*
* yaSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* yaSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
/* The crypto wrapper header is used to define policies for the cipher
* components used by SSL. There are 3 policies to consider:
*
* 1) MAC, the Message Authentication Code used for each Message
* 2) Bulk Cipher, the Cipher used to encrypt/decrypt each Message
* 3) Atuhentication, the Digitial Signing/Verifiaction scheme used
*
* This header doesn't rely on a specific crypto libraries internals,
* only the implementation should.
*/
#ifndef yaSSL_CRYPTO_WRAPPER_HPP
#define yaSSL_CRYPTO_WRAPPER_HPP
#include "yassl_types.hpp"
namespace yaSSL {
// Digest policy should implement a get_digest, update, and get sizes for pad and
// digest
struct Digest : public virtual_base {
virtual void get_digest(byte*) = 0;
virtual void get_digest(byte*, const byte*, unsigned int) = 0;
virtual void update(const byte*, unsigned int) = 0;
virtual uint get_digestSize() const = 0;
virtual uint get_padSize() const = 0;
virtual ~Digest() {}
};
// For use with NULL Digests
struct NO_MAC : public Digest {
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
};
// MD5 Digest
class MD5 : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
MD5();
~MD5();
MD5(const MD5&);
MD5& operator=(const MD5&);
private:
struct MD5Impl;
MD5Impl* pimpl_;
};
// SHA-1 Digest
class SHA : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
SHA();
~SHA();
SHA(const SHA&);
SHA& operator=(const SHA&);
private:
struct SHAImpl;
SHAImpl* pimpl_;
};
// RIPEMD-160 Digest
class RMD : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
RMD();
~RMD();
RMD(const RMD&);
RMD& operator=(const RMD&);
private:
struct RMDImpl;
RMDImpl* pimpl_;
};
// HMAC_MD5
class HMAC_MD5 : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
HMAC_MD5(const byte*, unsigned int);
~HMAC_MD5();
private:
struct HMAC_MD5Impl;
HMAC_MD5Impl* pimpl_;
HMAC_MD5(const HMAC_MD5&);
HMAC_MD5& operator=(const HMAC_MD5&);
};
// HMAC_SHA-1
class HMAC_SHA : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
HMAC_SHA(const byte*, unsigned int);
~HMAC_SHA();
private:
struct HMAC_SHAImpl;
HMAC_SHAImpl* pimpl_;
HMAC_SHA(const HMAC_SHA&);
HMAC_SHA& operator=(const HMAC_SHA&);
};
// HMAC_RMD
class HMAC_RMD : public Digest {
public:
void get_digest(byte*);
void get_digest(byte*, const byte*, unsigned int);
void update(const byte*, unsigned int);
uint get_digestSize() const;
uint get_padSize() const;
HMAC_RMD(const byte*, unsigned int);
~HMAC_RMD();
private:
struct HMAC_RMDImpl;
HMAC_RMDImpl* pimpl_;
HMAC_RMD(const HMAC_RMD&);
HMAC_RMD& operator=(const HMAC_RMD&);
};
// BulkCipher policy should implement encrypt, decrypt, get block size,
// and set keys for encrypt and decrypt
struct BulkCipher : public virtual_base {
virtual void encrypt(byte*, const byte*, unsigned int) = 0;
virtual void decrypt(byte*, const byte*, unsigned int) = 0;
virtual void set_encryptKey(const byte*, const byte* = 0) = 0;
virtual void set_decryptKey(const byte*, const byte* = 0) = 0;
virtual uint get_blockSize() const = 0;
virtual int get_keySize() const = 0;
virtual int get_ivSize() const = 0;
virtual ~BulkCipher() {}
};
// For use with NULL Ciphers
struct NO_Cipher : public BulkCipher {
void encrypt(byte*, const byte*, unsigned int) {}
void decrypt(byte*, const byte*, unsigned int) {}
void set_encryptKey(const byte*, const byte*) {}
void set_decryptKey(const byte*, const byte*) {}
uint get_blockSize() const { return 0; }
int get_keySize() const { return 0; }
int get_ivSize() const { return 0; }
};
// SSLv3 and TLSv1 always use DES in CBC mode so IV is required
class DES : public BulkCipher {
public:
void encrypt(byte*, const byte*, unsigned int);
void decrypt(byte*, const byte*, unsigned int);
void set_encryptKey(const byte*, const byte*);
void set_decryptKey(const byte*, const byte*);
uint get_blockSize() const { return DES_BLOCK; }
int get_keySize() const { return DES_KEY_SZ; }
int get_ivSize() const { return DES_IV_SZ; }
DES();
~DES();
private:
struct DESImpl;
DESImpl* pimpl_;
DES(const DES&); // hide copy
DES& operator=(const DES&); // & assign
};
// 3DES Encrypt-Decrypt-Encrypt in CBC mode
class DES_EDE : public BulkCipher {
public:
void encrypt(byte*, const byte*, unsigned int);
void decrypt(byte*, const byte*, unsigned int);
void set_encryptKey(const byte*, const byte*);
void set_decryptKey(const byte*, const byte*);
uint get_blockSize() const { return DES_BLOCK; }
int get_keySize() const { return DES_EDE_KEY_SZ; }
int get_ivSize() const { return DES_IV_SZ; }
DES_EDE();
~DES_EDE();
private:
struct DES_EDEImpl;
DES_EDEImpl* pimpl_;
DES_EDE(const DES_EDE&); // hide copy
DES_EDE& operator=(const DES_EDE&); // & assign
};
// Alledged RC4
class RC4 : public BulkCipher {
public:
void encrypt(byte*, const byte*, unsigned int);
void decrypt(byte*, const byte*, unsigned int);
void set_encryptKey(const byte*, const byte*);
void set_decryptKey(const byte*, const byte*);
uint get_blockSize() const { return 0; }
int get_keySize() const { return RC4_KEY_SZ; }
int get_ivSize() const { return 0; }
RC4();
~RC4();
private:
struct RC4Impl;
RC4Impl* pimpl_;
RC4(const RC4&); // hide copy
RC4& operator=(const RC4&); // & assign
};
// AES
class AES : public BulkCipher {
public:
void encrypt(byte*, const byte*, unsigned int);
void decrypt(byte*, const byte*, unsigned int);
void set_encryptKey(const byte*, const byte*);
void set_decryptKey(const byte*, const byte*);
uint get_blockSize() const { return AES_BLOCK_SZ; }
int get_keySize() const;
int get_ivSize() const { return AES_IV_SZ; }
explicit AES(unsigned int = AES_128_KEY_SZ);
~AES();
private:
struct AESImpl;
AESImpl* pimpl_;
AES(const AES&); // hide copy
AES& operator=(const AES&); // & assign
};
// Random number generator
class RandomPool {
public:
void Fill(opaque* dst, uint sz) const;
RandomPool();
~RandomPool();
int GetError() const;
friend class RSA;
friend class DSS;
friend class DiffieHellman;
private:
struct RandomImpl;
RandomImpl* pimpl_;
RandomPool(const RandomPool&); // hide copy
RandomPool& operator=(const RandomPool&); // & assign
};
// Authentication policy should implement sign, and verify
struct Auth : public virtual_base {
virtual void sign(byte*, const byte*, unsigned int, const RandomPool&) = 0;
virtual bool verify(const byte*, unsigned int, const byte*,
unsigned int) = 0;
virtual uint get_signatureLength() const = 0;
virtual ~Auth() {}
};
// For use with NULL Authentication schemes
struct NO_Auth : public Auth {
void sign(byte*, const byte*, unsigned int, const RandomPool&) {}
bool verify(const byte*, unsigned int, const byte*, unsigned int)
{ return true; }
};
// Digitial Signature Standard scheme
class DSS : public Auth {
public:
void sign(byte*, const byte*, unsigned int, const RandomPool&);
bool verify(const byte*, unsigned int, const byte*, unsigned int);
uint get_signatureLength() const;
DSS(const byte*, unsigned int, bool publicKey = true);
~DSS();
private:
struct DSSImpl;
DSSImpl* pimpl_;
DSS(const DSS&);
DSS& operator=(const DSS&);
};
// RSA Authentication and exchange
class RSA : public Auth {
public:
void sign(byte*, const byte*, unsigned int, const RandomPool&);
bool verify(const byte*, unsigned int, const byte*, unsigned int);
void encrypt(byte*, const byte*, unsigned int, const RandomPool&);
void decrypt(byte*, const byte*, unsigned int, const RandomPool&);
uint get_signatureLength() const;
uint get_cipherLength() const;
RSA(const byte*, unsigned int, bool publicKey = true);
~RSA();
private:
struct RSAImpl;
RSAImpl* pimpl_;
RSA(const RSA&); // hide copy
RSA& operator=(const RSA&); // & assing
};
class Integer;
// Diffie-Hellman agreement
// hide for now TODO: figure out a way to give access to C clients p and g args
class DiffieHellman {
public:
DiffieHellman(const byte*, unsigned int, const byte*, unsigned int,
const byte*, unsigned int, const RandomPool& random);
//DiffieHellman(const char*, const RandomPool&);
DiffieHellman(const Integer&, const Integer&, const RandomPool&);
~DiffieHellman();
DiffieHellman(const DiffieHellman&);
DiffieHellman& operator=(const DiffieHellman&);
uint get_agreedKeyLength() const;
const byte* get_agreedKey() const;
const byte* get_publicKey() const;
void makeAgreement(const byte*);
void set_sizes(int&, int&, int&) const;
void get_parms(byte*, byte*, byte*) const;
private:
struct DHImpl;
DHImpl* pimpl_;
};
// Lagrge Integer
class Integer {
public:
Integer();
~Integer();
Integer(const Integer&);
Integer& operator=(const Integer&);
void assign(const byte*, unsigned int);
friend class DiffieHellman;
private:
struct IntegerImpl;
IntegerImpl* pimpl_;
};
class x509;
x509* PemToDer(const char*, CertType);
} // naemspace
#endif // yaSSL_CRYPTO_WRAPPER_HPP
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