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wtls_statesupport.h：源码内容
							/* wtls_statesupport.h
 *
 */
#ifndef WTLS_STATESUPPORT_H
#define WTLS_STATESUPPORT_H
#include "gwlib/gwlib.h"
#include "wtls_pdu.h"
#include "wtls.h"
#define KEYSIZE_MAX 2048
#define NOT_EXPORTABLE 0
#define EXPORTABLE 1
#define BLOCK 0
#define STREAM 1
/* These enums and tables are pulled straight from the WTLS appendicies.
   Go and have a look at them if these aren't particularly clear. Obviously, since NULL
   is a builtin, and since RSA/MD5/SHA are all macros referenced by the openssl
   libraries, the names have had to be slightly altered to protect the innocent :->
*/
enum key_exchange_suites{
        NULL_keyxchg,
        SHARED_SECRET,
        DH_anon,
        DH_anon_512,
        RSA_anon,
        RSA_anon_512,
        RSA_anon_768,
        RSA_NOLIMIT,
        RSA_512,
        RSA_768,
        ECDH_anon,
        ECDH_anon_113,
        ECDH_anon_131,
        ECDH_ECDSA_NOLIMIT
};
enum bulk_algorithms {
        NULL_bulk,
        RC5_CBC_40,
        RC5_CBC_56,
        RC5_CBC,
        DES_CBC_40,
        DES_CBC,
        TRIPLE_DES_CBC_EDE,
        IDEA_CBC_40,
        IDEA_CBC_56,
        IDEA_CBC
};
enum keyed_macs{
        SHA_0,
        SHA_40,
        SHA_80,
        SHA_NOLIMIT,
        SHA_XOR_40,
        MD5_40,
        MD5_80,
        MD5_NOLIMIT
};
typedef struct 
{
        const char* title;
        int key_size_limit;
} keyxchg_table_t;
static keyxchg_table_t keyxchg_table[] = {
        {"NULL",0},
        {"Shared Secret", KEYSIZE_MAX},
        {"DH-anon",KEYSIZE_MAX},
        {"DH-anon-512",512},
        {"DH-anon-768",768},
        {"RSA-anon", KEYSIZE_MAX},
        {"RSA-anon-512",512},
        {"RSA-anon-768",768},
        {"RSA",KEYSIZE_MAX},
        {"RSA-512", 512},
        {"RSA-768",768},
        {"ECDH-anon",KEYSIZE_MAX},
        {"ECDH-anon-113",113},
        {"ECDH-anon-131",131},
        {"ECDH-ECDSA",KEYSIZE_MAX}
};
typedef struct 
{
        const char* title;
        int is_exportable;
        int block_or_stream;
        int key_material;
        int expanded_key_material;
        int effective_key_bits;
        int iv_size;
        int block_size;
} bulk_table_t;
static bulk_table_t bulk_table[] = {
        {"NULL Encryption",EXPORTABLE,STREAM,0,0,0,0,0},
        {"RC5-CBC-40",EXPORTABLE,BLOCK,5,16,40,8,8},
        {"RC5-CBC-56",EXPORTABLE,BLOCK,7,16,56,8,8},
        {"RC5-CBC",NOT_EXPORTABLE,BLOCK,16,16,128,8,8},
        {"DES-CBC-40",EXPORTABLE,BLOCK,5,8,40,8,8},
        {"DES-CBC",NOT_EXPORTABLE,BLOCK,8,8,56,8,8},
        {"3DES-CBC-EDE",NOT_EXPORTABLE,BLOCK,24,24,168,8,8},
        {"IDEA-CBC-40",EXPORTABLE,BLOCK,5,16,40,8,8},
        {"IDEA-CBC-56",EXPORTABLE,BLOCK,7,16,56,8,8},
        {"IDEA-CBC",NOT_EXPORTABLE,BLOCK,16,16,128,8,8}
};
typedef struct 
{
        const char* title;
        int key_size;
        int mac_size;
} hash_table_t;
static hash_table_t hash_table[] = {
        {"SHA-0",0,0},
        {"SHA1-40",20,5},
        {"SHA1-80",20,10},
        {"SHA1",20,20},
        {"SHA-XOR-40",0,5},
        {"MD5-40",16,5},
        {"MD5-80",16,10},
        {"MD5",16,16}        
};
Octstr* wtls_calculate_prf(Octstr* secret, Octstr* label,
                           Octstr* seed, int byteLength, WTLSMachine* wtls_machine);
RSAPublicKey* wtls_get_rsapublickey(void);
Random* wtls_get_random(void);
Octstr* wtls_decrypt(Octstr* buffer, WTLSMachine* wtls_machine);
Octstr* wtls_encrypt(Octstr* buffer, WTLSMachine* wtls_machine, int recordType);
Octstr* wtls_decrypt_rsa(Octstr* encryptedData);
/* The wtls_choose* functions implement the decision making process behind the
   protocol negotiations in wtls. */
CipherSuite* wtls_choose_ciphersuite(List* ciphersuites);
int wtls_choose_clientkeyid(List* clientKeyIDs);
int wtls_choose_snmode(int snmode);
int wtls_choose_krefresh(int krefresh);
/* The *_are_identical functions all return 1 if the packets match the condition as
 * expressed in the function name. As each packet can contain a "list" of pdus, we
 * need to search that list and return whether or not they contain identical pdus as listed.
 * On failure, they will return non-zero
 */
int clienthellos_are_identical (List* pdu_list, List* last_received_packet);
int certifcateverifys_are_identical (List* pdu_list, List* last_received_packet);
int certificates_are_identical (List* pdu_list, List* last_received_packet);
int clientkeyexchanges_are_identical (List* pdu_list, List* last_received_packet);
int changecipherspecs_are_identical (List* pdu_list, List* last_received_packet);
int finisheds_are_indentical (List* pdu_list, List* last_received_packet);
/* the packet_contains_* functions all return 1 if the packet contains a pdu of the type
 * expressed in the function name.
 */
int packet_contains_changecipherspec (List* pdu_list);
int packet_contains_finished (List* pdu_list);
int packet_contains_optional_stuff (List* pdu_list);
int packet_contains_userdata (List* pdu_list);
int packet_contains_clienthello (List* pdu_list);
/* the is_*_alert functions return 1 if the packet is a pdu of the type expressed in the
 * function name.
 */
int is_critical_alert (List* pdu_list);
int is_warning_alert (List* pdu_list);
void calculate_client_key_block(WTLSMachine *wtls_machine);
void calculate_server_key_block(WTLSMachine *wtls_machine);
#endif

						