prf_tls.h

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/*
* TLS v1.0 and v1.2 PRFs
* (C) 2004-2010 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
 
#ifndef BOTAN_TLS_PRF_H_
#define BOTAN_TLS_PRF_H_
 
#include <botan/kdf.h>
#include <botan/mac.h>
 
BOTAN_FUTURE_INTERNAL_HEADER(prf_tls.h)
 
namespace Botan {
 
/**
* PRF used in TLS 1.0/1.1
*/
class BOTAN_PUBLIC_API(2,0) TLS_PRF final : public KDF
   {
   public:
      std::string name() const override { return "TLS-PRF"; }
 
      KDF* clone() const override { return new TLS_PRF; }
 
      size_t kdf(uint8_t key[], size_t key_len,
                 const uint8_t secret[], size_t secret_len,
                 const uint8_t salt[], size_t salt_len,
                 const uint8_t label[], size_t label_len) const override;
 
      TLS_PRF(std::unique_ptr<MessageAuthenticationCode> hmac_md5,
              std::unique_ptr<MessageAuthenticationCode> hmac_sha1) :
         m_hmac_md5(std::move(hmac_md5)),
         m_hmac_sha1(std::move(hmac_sha1))
         {}
 
      TLS_PRF();
   private:
      std::unique_ptr<MessageAuthenticationCode> m_hmac_md5;
      std::unique_ptr<MessageAuthenticationCode> m_hmac_sha1;
   };
 
/**
* PRF used in TLS 1.2
*/
class BOTAN_PUBLIC_API(2,0) TLS_12_PRF final : public KDF
   {
   public:
      std::string name() const override { return "TLS-12-PRF(" + m_mac->name() + ")"; }
 
      KDF* clone() const override { return new TLS_12_PRF(m_mac->clone()); }
 
      size_t kdf(uint8_t key[], size_t key_len,
                 const uint8_t secret[], size_t secret_len,
                 const uint8_t salt[], size_t salt_len,
                 const uint8_t label[], size_t label_len) const override;
 
      /**
      * @param mac MAC algorithm to use
      */
      explicit TLS_12_PRF(MessageAuthenticationCode* mac) : m_mac(mac) {}
   private:
      std::unique_ptr<MessageAuthenticationCode> m_mac;
   };
 
}
 
#endif