tlsgroups.h

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/* 2020-2026 Quantum Resistant Cryptographic Solutions Corporation
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 * Written by: John G. Underhill
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#ifndef QSC_TLS_GROUPS_H
#define QSC_TLS_GROUPS_H
 
#include "qsccommon.h"
#include "tlserrors.h"
#include "tlstypes.h"
#include "tlslimits.h"
 
QSC_CPLUSPLUS_ENABLED_START


typedef struct qsc_tls_group_descriptor
{
    qsc_tls_named_group group;            
    const char* name;                     
    size_t privatekeysize;                
    size_t clientpublicsize;              
    size_t serverpublicsize;              
    size_t sharedsecretsize;              
    bool isclassical;                     
    bool iskem;                           
    bool ishybrid;                        
    bool supported;                       
} qsc_tls_group_descriptor;

typedef struct qsc_tls_key_exchange_state
{
    qsc_tls_named_group group;                                        
    uint8_t publicshare[QSC_TLS_MAX_HYBRID_CLIENT_KEYSHARE_SIZE];     
    size_t publicsharelen;                                            
    uint8_t privatekey[QSC_TLS_MAX_PRIVATE_KEY_SIZE];                 
    size_t privatekeylen;                                             
    bool initialized;                                                 
} qsc_tls_key_exchange_state;

QSC_EXPORT_API const qsc_tls_group_descriptor* qsc_tls_groups_descriptor_get(qsc_tls_named_group group);

QSC_EXPORT_API bool qsc_tls_groups_is_supported(qsc_tls_named_group group);

QSC_EXPORT_API qsc_tls_status qsc_tls_groups_generate_client_keypair(qsc_tls_key_exchange_state* state, qsc_tls_named_group group);

QSC_EXPORT_API qsc_tls_status qsc_tls_groups_client_derive_shared_secret(qsc_tls_key_exchange_state* state,
    const uint8_t* serverkeyshare, size_t serverkeysharelen, uint8_t* sharedsecret, size_t sharedsecretlen, size_t* written);

QSC_EXPORT_API qsc_tls_status qsc_tls_groups_server_respond(qsc_tls_named_group group, const uint8_t* clientkeyshare, size_t clientkeysharelen, 
    uint8_t* serverkeyshare, size_t serverkeysharelen, size_t* serverkeysharewritten, uint8_t* sharedsecret, size_t sharedsecretlen, size_t* sharedsecretwritten);

QSC_EXPORT_API void qsc_tls_groups_key_exchange_state_dispose(qsc_tls_key_exchange_state* state);
 
QSC_CPLUSPLUS_ENABLED_END
 
#endif