diff --git a/include/openssl/kdf_standard.h b/include/openssl/kdf_standard.h
deleted file mode 100644
index 2db3b518..00000000
--- a/include/openssl/kdf_standard.h
+++ /dev/null
@@ -1,378 +0,0 @@
-#include <string.h>
-
-
-#define SM3_len 256
-#define SM3_T1 0x79CC4519
-#define SM3_T2 0x7A879D8A
-#define SM3_IVA 0x7380166f
-#define SM3_IVB 0x4914b2b9
-#define SM3_IVC 0x172442d7
-#define SM3_IVD 0xda8a0600
-#define SM3_IVE 0xa96f30bc
-#define SM3_IVF 0x163138aa
-#define SM3_IVG 0xe38dee4d
-#define SM3_IVH 0xb0fb0e4e
-
-
-/* Various logical functions */
-#define SM3_p1(x) (x ^ SM3_rotl32(x, 15) ^ SM3_rotl32(x, 23))
-#define SM3_p0(x) (x ^ SM3_rotl32(x, 9) ^ SM3_rotl32(x, 17))
-#define SM3_ff0(a,b,c) (a ^ b ^ c)
-#define SM3_ff1(a,b,c) ((a & b) | (a & c) | (b & c))
-#define SM3_gg0(e,f,g) (e ^ f ^ g)
-#define SM3_gg1(e,f,g) ((e & f) | ((~e) & g))
-#define SM3_rotl32(x,n) (((x) << n) | ((x) >> (32 - n)))
-#define SM3_rotr32(x,n) (((x) >> n) | ((x) << (32 - n)))
-
-
-
-typedef struct {
-	unsigned long state[8];
-	unsigned long length;
-	unsigned long curlen;
-	unsigned char buf[64];
-} SM3_STATE;
-
-
-void BiToWj(unsigned long Bi[], unsigned long Wj[]);
-void WjToWj1(unsigned long Wj[], unsigned long Wj1[]);
-void CF(unsigned long Wj[], unsigned long Wj1[], unsigned long V[]);
-void BigEndian(unsigned char src[], unsigned int bytelen, unsigned char des[]);
-void SM3_init(SM3_STATE *md);
-void SM3_compress(SM3_STATE * md);
-void SM3_process(SM3_STATE * md, unsigned char buf[], int len);
-void SM3_done(SM3_STATE *md, unsigned char *hash);
-void SM3_256(unsigned char buf[], int len, unsigned char hash[]);
-void SM3_kdf(unsigned char *Z, unsigned short zlen, unsigned short klen, unsigned char *K);
-
-
-/* calculate W from Bi */
-void BiToW(unsigned long Bi[], unsigned long W[])
-{
-	int i;
-	unsigned long tmp;
-
-	for(i = 0; i <= 15; i++)
-	{
-		W[i] = Bi[i];
-	}
-	for(i = 16;i <= 67; i++)
-	{
-		tmp = W[i - 16] ^ W[i - 9] ^ SM3_rotl32(W[i - 3], 15);
-		W[i] = SM3_p1(tmp) ^ (SM3_rotl32(W[i - 13], 7)) ^ W[i - 6];
-	}
-}
-
-
-/* calculate W1 from W */
-void WToW1(unsigned long W[], unsigned long W1[])
-{
-	int i;
-	for(i = 0; i <= 63; i++)
-	{
-		W1[i] = W[i] ^ W[i + 4];
-	}
-}
-
-
-/* calculate the CF compress function and update V */
-void CF(unsigned long W[], unsigned long W1[], unsigned long V[])
-{
-	unsigned long SS1;
-	unsigned long SS2;
-	unsigned long TT1;
-	unsigned long TT2;
-	unsigned long A, B, C, D, E, F, G, H;
-	unsigned long T = SM3_T1;
-	unsigned long FF;
-	unsigned long GG;
-	int j;
-
-	//reg init, set ABCDEFGH = V0
-	A = V[0];
-	B = V[1];
-	C = V[2];
-	D = V[3];
-	E = V[4];
-	F = V[5];
-	G = V[6];
-	H = V[7];
-
-	for (j = 0; j <= 63; j++)
-	{
-		//SS1
-		if (j == 0)
-		{
-			T = SM3_T1;
-		}
-		else if (j == 16)
-		{
-			T = SM3_rotl32(SM3_T2, 16);
-		}
-		else
-		{
-			T = SM3_rotl32(T, 1);
-		}
-		SS1 = SM3_rotl32((SM3_rotl32(A, 12) + E + T), 7);
-
-		//SS2
-		SS2 = SS1 ^ SM3_rotl32(A, 12);
-
-		//TT1
-		if (j <= 15)
-		{
-			FF = SM3_ff0(A, B, C);
-		}
-		else
-		{
-			FF = SM3_ff1(A, B, C);
-		}
-		TT1 = FF + D + SS2 + *W1;
-		W1++;
-
-		//TT2
-		if (j <= 15)
-		{
-			GG = SM3_gg0(E, F, G);
-		}
-		else
-		{
-			GG = SM3_gg1(E, F, G);
-		}
-		TT2 = GG + H + SS1 + *W;
-		W++;
-
-		//D
-		D = C;
-
-		//C
-		C = SM3_rotl32(B, 9);
-
-		//B
-		B = A;
-
-		//A
-		A = TT1;
-
-		//H
-		H = G;
-
-		//G
-		G = SM3_rotl32(F, 19);
-
-		//F
-		F = E;
-
-		//E
-		E = SM3_p0(TT2);
-	}
-	//update V
-	V[0] = A ^ V[0];
-	V[1] = B ^ V[1];
-	V[2] = C ^ V[2];
-	V[3] = D ^ V[3];
-	V[4] = E ^ V[4];
-	V[5] = F ^ V[5];
-	V[6] = G ^ V[6];
-	V[7] = H ^ V[7];
-}
-
-
-/* unsigned int endian converse. GM/T 0004-2012 requires to use big-endian.
- * if CPu uses little-endian, BigEndian function is a necessary
- * call to change the little-endian format into big-endian format.
- */
-void BigEndian(unsigned char src[], unsigned int bytelen, unsigned char des[])
-{
-	unsigned char tmp = 0;
-	unsigned long i = 0;
-	for (i = 0; i < bytelen / 4; i++)
-	{
-		tmp = des[4 * i];
-		des[4 * i] = src[4 * i + 3];
-		src[4 * i + 3] = tmp;
-		tmp = des[4 * i + 1];
-		des[4 * i + 1] = src[4 * i + 2];
-		des[4 * i + 2] = tmp;
-	}
-}
-
-
-/* initiate SM3 state */
-void SM3_init(SM3_STATE *md)
-{
-	md->curlen = md->length = 0;
-	md->state[0] = SM3_IVA;
-	md->state[1] = SM3_IVB;
-	md->state[2] = SM3_IVC;
-	md->state[3] = SM3_IVD;
-	md->state[4] = SM3_IVE;
-	md->state[5] = SM3_IVF;
-	md->state[6] = SM3_IVG;
-	md->state[7] = SM3_IVH;
-}
-
-
-/* compress a single a block of message */
-void SM3_compress(SM3_STATE * md)
-{
-	unsigned long W[68];
-	unsigned long W1[64];
-
-	//if CPU uses little-endian, BigEndian function is a necessary call
-	BigEndian(md->buf, 64, md->buf);
-	BiToW((unsigned long *)md->buf, W);
-	WToW1(W, W1);
-	CF(W, W1, md->state);
-}
-
-
-/* compress the first(len/64) blocks of message */
-void SM3_process(SM3_STATE * md, unsigned char *buf, int len)
-{
-	while (len--)
-	{
-		/* copy byte */
-		md->buf[md->curlen] = *buf++;
-		md->curlen++;
-
-		/* is 64 bytes full? */
-		if (md->curlen == 64)
-		{
-			SM3_compress(md);
-			md->length += 512;
-			md->curlen = 0;
-		}
-	}
-}
-
-
-/* compress the rest message that the SM3_process has left behind */
-void SM3_done(SM3_STATE *md, unsigned char hash[])
-{
-	int i;
-	unsigned char tmp = 0;
-
-	/* increase the bit length of the message */
-	md->length += md->curlen << 3;
-
-	/* append the '1' bit */
-	md->buf[md->curlen] = 0x80;
-	md->curlen++;
-	
-	/* if the length is currently above 56 bytes, appends zeros till
-		it reaches 64 bytes, compress the current block, creat a new
-		block by appending zeros and length,and then compress it
-	*/
-	if (md->curlen > 56)
-	{
-		for (; md->curlen < 64;)
-		{
-			md->buf[md->curlen] = 0;
-			md->curlen++;
-		}
-		SM3_compress(md);
-		md->curlen = 0;
-	}
-
-	/* if the length is less than 56 bytes, pad upto 56 bytes of zeroes */
-	for (; md->curlen < 56;)
-	{
-		md->buf[md->curlen] = 0;
-		md->curlen++;
-	}
-
-	/* since all messages are under 2^32 bits we mark the top bits zero */
-	for (i = 56; i < 60; i++)
-	{
-		md->buf[i] = 0;
-	}
-
-	/* append length */
-	md->buf[63] = md->length & 0xff;
-	md->buf[62] = (md->length >> 8) & 0xff;
-	md->buf[61] = (md->length >> 16) & 0xff;
-	md->buf[60] = (md->length >> 24) & 0xff;
-	
-	SM3_compress(md);
-
-	/* copy output */
-	memcpy(hash, md->state, SM3_len / 8);
-	BigEndian(hash, SM3_len / 8, hash);		//if CPU uses little-endian, BigEndian function is a necessary call
-}
-
-
-/* calculate a hash value from a given message */
-void SM3_256(unsigned char buf[], int len, unsigned char hash[])
-{
-	SM3_STATE md;
-	SM3_init(&md);
-	SM3_process(&md, buf, len);
-	SM3_done(&md, hash);
-}
-
-
-/* key derivation function */
-void SM3_KDF( unsigned char Z[] ,unsigned short zlen,unsigned short klen,unsigned char K[])
-{
-	unsigned short i, j, t;
-	unsigned int bitklen;
-	SM3_STATE md;
-	unsigned char Ha[SM2_NUMWORD];
-	unsigned char ct[4] = {0, 0, 0, 1};
-
-	bitklen = klen * 8;
-	
-	if (bitklen % SM2_NUMBITS)
-		t = bitklen / SM2_NUMBITS + 1;
-	else
-		t = bitklen / SM2_NUMBITS;
-
-	//s4: K = Ha1 || Ha2 || ...
-	for (i = 1; i < t; i++)
-	{
-		//s2: Hai = Hv(Z || ct)
-		SM3_init(&md);
-		SM3_process(&md, Z, zlen);
-		SM3_process(&md, ct, 4);
-		SM3_done(&md, Ha);
-		memcpy((K + SM2_NUMWORD * (i - 1)), Ha, SM2_NUMWORD);
-
-		if (ct[3] == 0xff)
-		{
-			ct[3] = 0;
-			if (ct[2] == 0xff)
-			{
-				ct[2] = 0;
-				if (ct[1] == 0xff)
-				{
-					ct[1] = 0;
-					ct[0]++;
-				}
-				else 
-					ct[1]++;
-			}
-			else 
-				ct[2]++;
-		}
-		else 
-			ct[3]++;
-	}
-
-	//s3
-	SM3_init(&md);
-	SM3_process(&md, Z, zlen);
-	SM3_process(&md, ct, 4);
-	SM3_done(&md, Ha);
-
-	if(bitklen % SM2_NUMBITS)
-	{
-		i = (SM2_NUMBITS - bitklen + SM2_NUMBITS * (bitklen / SM2_NUMBITS)) / 8;
-		j = (bitklen - SM2_NUMBITS * (bitklen / SM2_NUMBITS)) / 8;
-		memcpy((K + SM2_NUMWORD * (t - 1)), Ha, j);
-	}
-	else
-	{
-		memcpy((K + SM2_NUMWORD * (t - 1)), Ha, SM2_NUMWORD);
-	}
-}