42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
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#ifndef _ECDH_H_
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#define _ECDH_H_
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#include "bigint_impl.h"
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#define ECDH_MEM_POOL_SIZE 0x750
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typedef struct {
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bigint *x;
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bigint *y;
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bigint *z;
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int Z_is_one;
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int Z_is_zero;
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} EC_POINT;
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struct ECDH_CTX_st {
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BI_CTX ctx;
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EC_POINT G;
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EC_POINT PubKey;
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bigint *ECDHKey;
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bigint *PriKey;
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};
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typedef struct ECDH_CTX_st ECDH_CTX;
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//In:Prikey 24byte
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//Out:PubKeyx PubKeyy 24byte
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void ecdh_Generate_PublicKey(ECDH_CTX *ecdh_ctx, const unsigned char *PriKey, unsigned char *PubKeyx, unsigned char *PubKeyy);
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//In:PublicKeyBx PublicKeyBy 24byte
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//Out:DHKey 24byte
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void ecdh_Compute_DHKey(ECDH_CTX *ecdh_ctx, unsigned char *PublicKeyBx, unsigned char *PublicKeyBy, unsigned char *DHKey);
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///由于计算和用于发送的buffer存在大小端相反问题，所以再封装一层函数
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void ecdh_PublicKey(ECDH_CTX *ecdh_ctx, const unsigned char *PriKey, unsigned char *PubKeyx, unsigned char *PubKeyy);
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void ecdh_DHKey(ECDH_CTX *ecdh_ctx, unsigned char *PublicKeyBx, unsigned char *PublicKeyBy, unsigned char *DHKey);
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//ECDH_CTX *ecdh_init(void);
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void ecdh_init(ECDH_CTX *ec_ctx, char *bigint_mem_pool);
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void ecdh_free(ECDH_CTX *ecdh);
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#endif
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