算法过程

程序实现

///************************************************************************

//  File name:    SM9_enc_dec.c

//  Version:      SM9_enc_dec_V1.0

//  Date:         Dec 29,2016

//  Description:  implementation of SM9 encryption algorithm and decryption algorithm

//                all operations based on BN curve line function

//  Function List:

//        1.bytes128_to_ecn2        //convert 128 bytes into ecn2

//        2.zzn12_ElementPrint      //print all element of struct zzn12

//        3.ecn2_Bytes128_Print     //print 128 bytes of ecn2

//        4.LinkCharZzn12           //link two different types(unsigned char and zzn12)to one(unsigned char)

//        5.Test_Point              //test if the given point is on SM9 curve

//        6.SM4_Block_Encrypt       //encrypt the message with padding,according to PKS#5

//        7.SM4_Block_Decrypt       //decrypt the cipher with padding,according to PKS#5

//        8.SM9_H1                  //function H1 in SM9 standard 5.4.2.2

//        9.SM9_Enc_MAC             //MAC in SM9 standard 5.4.5

//        10.SM9_Init               //initiate SM9 curve

//        11.SM9_GenerateEncryptKey //generate encrypted private and public key

//        12.SM9_Encrypt            //SM9 encryption algorithm

//        13.SM9_Decrypt            //SM9 decryption algorithm

//        14.SM9_SelfCheck()        //SM9 slef-check 

//

// Notes:

// This SM9 implementation source code can be used for academic, non-profit making or non-commercial use only.

// This SM9 implementation is created on MIRACL. SM9 implementation source code provider does not provide MIRACL library, MIRACL license or any permission to use MIRACL library. Any commercial use of MIRACL requires a license which may be obtained from Shamus Software Ltd. 

//**************************************************************************/

#include "SM9_enc_dec.h"

#include "kdf.h"

#include "SM4.h" 

/****************************************************************

Function:       bytes128_to_ecn2

Description:    convert 128 bytes into ecn2

Calls:          MIRACL functions

Called By:      SM9_Init,SM9_Decrypt

Input:          Ppubs[]

Output:         ecn2 *res

Return:         FALSE: execution error

TRUE: execute correctly

Others:

****************************************************************/

BOOL bytes128_to_ecn2(unsigned char Ppubs[], ecn2 *res)

{

	zzn2 x, y;

	big a, b;

	ecn2 r;

	r.x.a = mirvar(0); r.x.b = mirvar(0);

	r.y.a = mirvar(0); r.y.b = mirvar(0);

	r.z.a = mirvar(0); r.z.b = mirvar(0);

	r.marker = MR_EPOINT_INFINITY;

	x.a = mirvar(0); x.b = mirvar(0);

	y.a = mirvar(0); y.b = mirvar(0);

	a = mirvar(0); b = mirvar(0);

	bytes_to_big(BNLEN, Ppubs, b);

	bytes_to_big(BNLEN, Ppubs + BNLEN, a);

	zzn2_from_bigs(a, b, &x);

	bytes_to_big(BNLEN, Ppubs + BNLEN * 2, b);

	bytes_to_big(BNLEN, Ppubs + BNLEN * 3, a);

	zzn2_from_bigs(a, b, &y);

	return ecn2_set(&x, &y, res);

}

/****************************************************************

Function:       zzn12_ElementPrint

Description:    print all element of struct zzn12

Calls:          MIRACL functions

Called By:      SM9_Encrypt,SM9_Decrypt

Input:          zzn12 x

Output:         NULL

Return:         NULL

Others:

****************************************************************/

void zzn12_ElementPrint(zzn12 x)

{

	big tmp;

	tmp = mirvar(0);

	redc(x.c.b.b, tmp); cotnum(tmp, stdout);

	redc(x.c.b.a, tmp); cotnum(tmp, stdout);

	redc(x.c.a.b, tmp); cotnum(tmp, stdout);

	redc(x.c.a.a, tmp); cotnum(tmp, stdout);

	redc(x.b.b.b, tmp); cotnum(tmp, stdout);

	redc(x.b.b.a, tmp); cotnum(tmp, stdout);

	redc(x.b.a.b, tmp); cotnum(tmp, stdout);

	redc(x.b.a.a, tmp); cotnum(tmp, stdout);

	redc(x.a.b.b, tmp); cotnum(tmp, stdout);

	redc(x.a.b.a, tmp); cotnum(tmp, stdout);

	redc(x.a.a.b, tmp); cotnum(tmp, stdout);

	redc(x.a.a.a, tmp); cotnum(tmp, stdout);

}

/****************************************************************

Function:       ecn2_Bytes128_Print

Description:    print 128 bytes of ecn2

Calls:          MIRACL functions

Called By:      SM9_Encrypt,SM9_Decrypt

Input:          ecn2 x

Output:         NULL

Return:         NULL

Others:

****************************************************************/

void ecn2_Bytes128_Print(ecn2 x)

{

	big tmp;

	tmp = mirvar(0);

	redc(x.x.b, tmp); cotnum(tmp, stdout);

	redc(x.x.a, tmp); cotnum(tmp, stdout);

	redc(x.y.b, tmp); cotnum(tmp, stdout);

	redc(x.y.a, tmp); cotnum(tmp, stdout);

}

/****************************************************************

Function:       LinkCharZzn12

Description:    link two different types(unsigned char and zzn12)to one(unsigned char)

Calls:          MIRACL functions

Called By:      SM9_Encrypt,SM9_Decrypt

Input:          message:

len:    length of message

w:      zzn12 element

Output:         Z:      the characters array stored message and w

Zlen:   length of Z

Return:         NULL

Others:

****************************************************************/

void LinkCharZzn12(unsigned char *message, int len, zzn12 w, unsigned char *Z, int Zlen)

{

	big tmp;

	tmp = mirvar(0);

	memcpy(Z, message, len);

	redc(w.c.b.b, tmp); big_to_bytes(BNLEN, tmp, Z + len, 1);

	redc(w.c.b.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN, 1);

	redc(w.c.a.b, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 2, 1);

	redc(w.c.a.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 3, 1);

	redc(w.b.b.b, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 4, 1);

	redc(w.b.b.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 5, 1);

	redc(w.b.a.b, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 6, 1);

	redc(w.b.a.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 7, 1);

	redc(w.a.b.b, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 8, 1);

	redc(w.a.b.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 9, 1);

	redc(w.a.a.b, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 10, 1);

	redc(w.a.a.a, tmp); big_to_bytes(BNLEN, tmp, Z + len + BNLEN * 11, 1);

}

/****************************************************************

Function:       Test_Point

Description:    test if the given point is on SM9 curve

Calls:

Called By:      SM9_Decrypt

Input:          point

Output:         null

Return:         0: success

1: not a valid point on curve

Others:

****************************************************************/

int Test_Point(epoint* point)

{

	big x, y, x_3, tmp;

	epoint *buf;

	x = mirvar(0); y = mirvar(0);

	x_3 = mirvar(0);

	tmp = mirvar(0);

	buf = epoint_init();

	//test if y^2=x^3+b

	epoint_get(point, x, y);

	power(x, 3, para_q, x_3);     //x_3=x^3 mod p

	multiply(x, para_a, x);

	divide(x, para_q, tmp);

	add(x_3, x, x);                  //x=x^3+ax+b

	add(x, para_b, x);

	divide(x, para_q, tmp);          //x=x^3+ax+b mod p

	power(y, 2, para_q, y);        //y=y^2 mod p

	if (mr_compare(x, y) != 0)

		return 1;

	//test infinity

	ecurve_mult(N, point, buf);

	if (point_at_infinity(buf) == FALSE)

		return 1;

	return 0;

}

/***************************************************************

Function:       SM4_Block_Encrypt

Description:    encrypt the message with padding,according to PKS#5

Calls:          SM4_Encrypt

Called By:      SM9_Encrypt

Input:

key:the key of SM4

message:data to be encrypted

mlen:   the length of message

Output:

cipher: ciphertext

cipher_len:the length of ciphertext

Return:         NULL

Others:

****************************************************************/

void SM4_Block_Encrypt(unsigned char key[], unsigned char * message, int mlen, unsigned char *cipher, int * cipher_len)

{

	unsigned char mess[16];

	int i, rem = mlen % 16;

	for (i = 0; i<mlen / 16; i++)

		SM4_Encrypt(key, &message[i * 16], &cipher[i * 16]);

	//encrypt the last block

	memset(mess, 16 - rem, 16);

	if (rem)

		memcpy(mess, &message[i * 16], rem);

	SM4_Encrypt(key, mess, &cipher[i * 16]);

}

/***************************************************************

Function:       SM4_Block_Decrypt

Description:    decrypt the cipher with padding,according to PKS#5

Calls:          SM4_Decrypt

Called By:      SM9_Decrypt

Input:

key:the key of SM4

cipher: ciphertext

mlen:   the length of ciphertext

Output:

plain: plaintext

plain_len:the length of plaintext

Return:         NULL

Others:

****************************************************************/

void SM4_Block_Decrypt(unsigned char key[], unsigned char *cipher, int len, unsigned char *plain, int *plain_len)

{

	int i;

	for (i = 0; i<len / 16; i++)

		SM4_Decrypt(key, cipher + i * 16, plain + i * 16);

	*plain_len = len - plain[len - 1];

}

/****************************************************************

Function:       SM9_H1

Description:    function H1 in SM9 standard 5.4.2.2

Calls:          MIRACL functions,SM3_KDF

Called By:      SM9_Encrypt

Input:          Z:

Zlen:the length of Z

n:Frobniues constant X

Output:         h1=H1(Z,Zlen)

Return:         0: success;

1: asking for memory error

Others:

****************************************************************/

int SM9_H1(unsigned char Z[], int Zlen, big n, big h1)

{

	int hlen, i, ZHlen;

	big hh, i256, tmp, n1;

	unsigned char *ZH = NULL, *ha = NULL;

	hh = mirvar(0); i256 = mirvar(0);

	tmp = mirvar(0); n1 = mirvar(0);

	convert(1, i256);

	ZHlen = Zlen + 1;

	hlen = (int)ceil((5.0*logb2(n)) / 32.0);

	decr(n, 1, n1);

	ZH = (char *)malloc(sizeof(char)*(ZHlen + 1));

	if (ZH == NULL) return SM9_ASK_MEMORY_ERR;

	memcpy(ZH + 1, Z, Zlen);

	ZH[0] = 0x01;

	ha = (char *)malloc(sizeof(char)*(hlen + 1));

	if (ha == NULL) return SM9_ASK_MEMORY_ERR;

	SM3_KDF(ZH, ZHlen, hlen, ha);

	for (i = hlen - 1; i >= 0; i--)//key[从大到小]

	{

		premult(i256, ha[i], tmp);

		add(hh, tmp, hh);

		premult(i256, 256, i256);

		divide(i256, n1, tmp);

		divide(hh, n1, tmp);

	}

	incr(hh, 1, h1);

	free(ZH); free(ha);

	return 0;

}

/****************************************************************

Function:       SM9_Enc_MAC

Description:    MAC in SM9 standard 5.4.5

Calls:          SM3_256

Called By:      SM9_Encrypt,SM9_Decrypt

Input:

K:key

Klen:the length of K

M:message

Mlen:the length of message

Output:         C=MAC(K,Z)

Return:         0: success;

1: asking for memory error

Others:

****************************************************************/

int SM9_Enc_MAC(unsigned char *K, int Klen, unsigned char *M, int Mlen, unsigned char C[])

{

	unsigned char *Z = NULL;

	int len = Klen + Mlen;

	Z = (char *)malloc(sizeof(char)*(len + 1));

	if (Z == NULL) return SM9_ASK_MEMORY_ERR;

	memcpy(Z, M, Mlen);

	memcpy(Z + Mlen, K, Klen);

	SM3_256(Z, len, C);

	free(Z);

	return 0;

}

/****************************************************************

Function:       SM9_Init

Description:    Initiate SM9 curve

Calls:          MIRACL functions

Called By:      SM9_SelfCheck

Input:          null

Output:         null

Return:         0: success;

5: base point P1 error

6: base point P2 error

Others:

****************************************************************/

int SM9_Init()

{

	big P1_x, P1_y;

	mip = mirsys(1000, 16);;

	mip->IOBASE = 16;

	para_q = mirvar(0); N = mirvar(0);

	P1_x = mirvar(0);  P1_y = mirvar(0);

	para_a = mirvar(0);

	para_b = mirvar(0); para_t = mirvar(0);

	X.a = mirvar(0);  X.b = mirvar(0);

	P2.x.a = mirvar(0); P2.x.b = mirvar(0);

	P2.y.a = mirvar(0); P2.y.b = mirvar(0);

	P2.z.a = mirvar(0); P2.z.b = mirvar(0);

	P2.marker = MR_EPOINT_INFINITY;

	P1 = epoint_init();

	bytes_to_big(BNLEN, SM9_q, para_q);

	bytes_to_big(BNLEN, SM9_P1x, P1_x);

	bytes_to_big(BNLEN, SM9_P1y, P1_y);

	bytes_to_big(BNLEN, SM9_a, para_a);

	bytes_to_big(BNLEN, SM9_b, para_b);

	bytes_to_big(BNLEN, SM9_N, N);

	bytes_to_big(BNLEN, SM9_t, para_t);

	mip->TWIST = MR_SEXTIC_M;

	ecurve_init(para_a, para_b, para_q, MR_PROJECTIVE);  //Initialises GF(q) elliptic curve

														 //MR_PROJECTIVE specifying  projective coordinates 

	if (!epoint_set(P1_x, P1_y, 0, P1)) return SM9_G1BASEPOINT_SET_ERR;

	if (!(bytes128_to_ecn2(SM9_P2, &P2)))   return SM9_G2BASEPOINT_SET_ERR;

	set_frobenius_constant(&X);

	return 0;

}

/***************************************************************

Function:       SM9_GenerateEncryptKey

Description:    Generate encryption keys(public key and private key)

Calls:          MIRACL functions,SM9_H1,xgcd,ecn2_Bytes128_Print

Called By:      SM9_SelfCheck

Input:          hid:0x03

ID:identification

IDlen:the length of ID

ke:master private key used to generate encryption public key and private key

Output:         Ppubs:encryption public key

deB: encryption private key

Return:         0: success;

1: asking for memory error

Others:

****************************************************************/

int SM9_GenerateEncryptKey(unsigned char hid[], unsigned char *ID, int IDlen, big ke, unsigned char Ppubs[], unsigned char deB[])

{

	big h1, t1, t2, rem, xPpub, yPpub, tmp;

	unsigned char *Z = NULL;

	int Zlen = IDlen + 1, buf;

	ecn2 dEB;

	epoint *Ppub;

	h1 = mirvar(0); t1 = mirvar(0);

	t2 = mirvar(0); rem = mirvar(0); tmp = mirvar(0);

	xPpub = mirvar(0); yPpub = mirvar(0);

	Ppub = epoint_init();

	dEB.x.a = mirvar(0); dEB.x.b = mirvar(0); dEB.y.a = mirvar(0); dEB.y.b = mirvar(0);

	dEB.z.a = mirvar(0); dEB.z.b = mirvar(0); dEB.marker = MR_EPOINT_INFINITY;

	Z = (char *)malloc(sizeof(char)*(Zlen + 1));

	memcpy(Z, ID, IDlen);

	memcpy(Z + IDlen, hid, 1);

	buf = SM9_H1(Z, Zlen, N, h1);

	if (buf != 0)    return buf;

	add(h1, ke, t1);//t1=H1(IDA||hid,N)+ks

	xgcd(t1, N, t1, t1, t1);//t1=t1(-1)

	multiply(ke, t1, t2); divide(t2, N, rem);//t2=ks*t1(-1) 

											 //Ppub=[ke]P2

	ecurve_mult(ke, P1, Ppub);

	//deB=[t2]P2

	ecn2_copy(&P2, &dEB);

	ecn2_mul(t2, &dEB);

	printf("\n**************用户B私钥 deB = (xdeB, ydeB)：*********************\n");

	ecn2_Bytes128_Print(dEB);

	printf("\n*******************加密主公钥 Ppubs=[ke]P1：**********************\n");

	epoint_get(Ppub, xPpub, yPpub);

	cotnum(xPpub, stdout); cotnum(yPpub, stdout);

	epoint_get(Ppub, xPpub, yPpub);

	big_to_bytes(BNLEN, xPpub, Ppubs, 1);

	big_to_bytes(BNLEN, yPpub, Ppubs + BNLEN, 1);

	redc(dEB.x.b, tmp); big_to_bytes(BNLEN, tmp, deB, 1);

	redc(dEB.x.a, tmp); big_to_bytes(BNLEN, tmp, deB + BNLEN, 1);

	redc(dEB.y.b, tmp); big_to_bytes(BNLEN, tmp, deB + BNLEN * 2, 1);

	redc(dEB.y.a, tmp); big_to_bytes(BNLEN, tmp, deB + BNLEN * 3, 1);

	free(Z);

	return 0;

}

/****************************************************************

Function:       SM9_Encrypt

Description:    SM9 encryption algorithm

Calls:          MIRACL functions,zzn12_init(),ecap(),member(),zzn12_ElementPrint(),

zzn12_pow(),LinkCharZzn12(),SM3_KDF(),SM9_Enc_MAC(),SM4_Block_Encrypt()

Called By:      SM9_SelfCheck()

Input:

hid:0x03

IDB          //identification of userB

message      //the message to be encrypted

len          //the length of message

rand         //a random number K lies in [1,N-1]

EncID        //encryption identification,0:stream cipher  1:block cipher

k1_len       //the byte length of K1 in block cipher algorithm

k2_len       //the byte length of K2 in MAC algorithm

Ppubs        //encrtption public key

Output:         C            //cipher C1||C3||C2

Clen         //the byte length of C

Return:

0: success

1: asking for memory error

2: element is out of order q

3: R-ate calculation error

A: K1 equals 0

Others:

****************************************************************/

int SM9_Encrypt(unsigned char hid[], unsigned char *IDB, unsigned char *message, int mlen, unsigned char rand[],int EncID, int k1_len, int k2_len, unsigned char Ppub[], unsigned char C[], int *C_len)

{

	big h, x, y, r;

	zzn12 g, w;

	epoint *Ppube, *QB, *C1;

	unsigned char *Z = NULL, *K = NULL, *C2 = NULL, C3[SM3_len / 8];

	int i = 0, j = 0, Zlen, buf, klen, C2_len;

	//initiate

	h = mirvar(0); r = mirvar(0); x = mirvar(0); y = mirvar(0);

	QB = epoint_init(); Ppube = epoint_init(); C1 = epoint_init();

	zzn12_init(&g); zzn12_init(&w);

	bytes_to_big(BNLEN, Ppub, x);

	bytes_to_big(BNLEN, Ppub + BNLEN, y);

	epoint_set(x, y, 0, Ppube);

	//Step1:calculate QB=[H1(IDB||hid,N)]P1+Ppube

	Zlen = strlen(IDB) + 1;

	Z = (char *)malloc(sizeof(char)*(Zlen + 1));

	if (Z == NULL) return SM9_ASK_MEMORY_ERR;

	memcpy(Z, IDB, strlen(IDB));

	memcpy(Z + strlen(IDB), hid, 1);

	buf = SM9_H1(Z, Zlen, N, h);

	if (buf) return buf;

	ecurve_mult(h, P1, QB);

	ecurve_add(Ppube, QB);

	printf("\n*******************QB:=[H1(IDB||hid,N)]P1+Ppube*****************\n");

	epoint_get(QB, x, y);

	cotnum(x, stdout); cotnum(y, stdout);

	//Step2:randnom

	bytes_to_big(BNLEN, rand, r);

	printf("\n***********************随机数 r:********************************\n");

	cotnum(r, stdout);

	//Step3:C1=[r]QB

	ecurve_mult(r, QB, C1);

	printf("\n*************************:C1=[r]QB*******************************\n");

	epoint_get(C1, x, y);

	cotnum(x, stdout); cotnum(y, stdout);

	big_to_bytes(BNLEN, x, C, 1); big_to_bytes(BNLEN, y, C + BNLEN, 1);

	//Step4:g = e(P2, Ppub-e)

	if (!ecap(P2, Ppube, para_t, X, &g)) return SM9_MY_ECAP_12A_ERR;

	//test if a ZZn12 element is of order q

	if (!member(g, para_t, X)) return SM9_MEMBER_ERR;

	printf("\n***********************g=e(P2,Ppube):****************************\n");

	zzn12_ElementPrint(g);

	//Step5:calculate w=g^r

	w = zzn12_pow(g, r);

	printf("\n***************************w=g^r:**********************************\n");

	zzn12_ElementPrint(w);

	free(Z);

	//Step6:calculate C2

	if (EncID == 0)

	{

		//基于密钥派生函数的序列密码算法

		//加密时间: 0.739000 seconds

		//解密时间: 0.156000 seconds

		C2_len = mlen;

		*C_len = BNLEN * 2 + SM3_len / 8 + C2_len;

		//Step:6-1: calculate K=KDF(C1||w||IDB,klen)

		klen = mlen + k2_len;

		Zlen = strlen(IDB) + BNLEN * 14;

		Z = (char *)malloc(sizeof(char)*(Zlen + 1));

		K = (char *)malloc(sizeof(char)*(klen + 1));

		C2 = (char *)malloc(sizeof(char)*(mlen + 1));

		if (Z == NULL || K == NULL || C2 == NULL) return SM9_ASK_MEMORY_ERR;

		LinkCharZzn12(C, BNLEN * 2, w, Z, (Zlen - strlen(IDB)));

		memcpy(Z + BNLEN * 14, IDB, strlen(IDB));

		SM3_KDF(Z, Zlen, klen, K);

		printf("\n*****************K=KDF(C1||w||IDB,klen):***********************\n");

		for (i = 0; i<klen; i++) printf("%02x", K[i]);

		//Step:6-2: calculate C2=M^K1,and test if K1==0?

		for (i = 0; i<mlen; i++)

		{

			if (K[i] == 0) j = j + 1;

			C2[i] = message[i] ^ K[i];

		}

		if (j == mlen) return SM9_ERR_K1_ZERO;

		printf("\n************************* C2=M^K1 :***************************\n");

		for (i = 0; i<C2_len; i++) printf("%02x", C2[i]);

		//Step7:calculate C3=MAC(K2,C2)

		SM9_Enc_MAC(K + mlen, k2_len, C2, mlen, C3);

		printf("\n********************** C3=MAC(K2,C2):*************************\n");

		for (i = 0; i<32; i++) printf("%02x", C3[i]);

		memcpy(C + BNLEN * 2, C3, SM3_len / 8);

		memcpy(C + BNLEN * 2 + SM3_len / 8, C2, C2_len);

		free(Z); free(K); free(C2);

	}

	else

	{

		//结合0密钥派生函数的分组密码算法（SM4）

		//加密时间: 0.303000 seconds

		//解密时间: 0.149000 seconds

		C2_len = (mlen / 16 + 1) * 16;

		*C_len = BNLEN * 2 + SM3_len / 8 + C2_len;

		//Step:6-1: calculate K=KDF(C1||w||IDB,klen)

		klen = k1_len + k2_len;

		Zlen = strlen(IDB) + BNLEN * 14;

		Z = (char *)malloc(sizeof(char)*(Zlen + 1));

		K = (char *)malloc(sizeof(char)*(klen + 1));

		C2 = (char *)malloc(sizeof(char)*(C2_len + 1));

		if (Z == NULL || K == NULL || C2 == NULL) return SM9_ASK_MEMORY_ERR;

		LinkCharZzn12(C, BNLEN * 2, w, Z, Zlen - strlen(IDB));

		memcpy(Z + BNLEN * 14, IDB, strlen(IDB));

		SM3_KDF(Z, Zlen, klen, K);

		printf("\n*****************K=KDF(C1||w||IDB,klen):***********************\n");

		for (i = 0; i<klen; i++) printf("%02x", K[i]);

		//Step:6-2: calculate C2=Enc(K1,M),and also test if K1==0?

		for (i = 0; i<k1_len; i++)

		{

			if (K[i] == 0) j = j + 1;

		}

		if (j == k1_len) return SM9_ERR_K1_ZERO;

		SM4_Block_Encrypt(K, message, mlen, C2, &C2_len);

		printf("\n*********************** C2=Enc(K1,M) :*************************\n");

		for (i = 0; i<C2_len; i++) printf("%02x", C2[i]);

		//Step7:calculate C3=MAC(K2,C2)

		SM9_Enc_MAC(K + k1_len, k2_len, C2, C2_len, C3);

		printf("\n********************** C3=MAC(K2,C2):*************************\n");

		for (i = 0; i<32; i++) printf("%02x", C3[i]);

		memcpy(C + BNLEN * 2, C3, SM3_len / 8);

		memcpy(C + BNLEN * 2 + SM3_len / 8, C2, C2_len);

		free(Z); free(K); free(C2);

	}

	return 0;

}

/****************************************************************

Function:       SM9_Decrypt

Description:    SM9 Decryption algorithm

Calls:          MIRACL functions,zzn12_init(),Test_Point(), ecap(),

member(),zzn12_ElementPrint(),LinkCharZzn12(),SM3_KDF(),

SM9_Enc_MAC(),SM4_Block_Decrypt(),bytes128_to_ecn2()

Called By:      SM9_SelfCheck()

Input:

C            //cipher C1||C3||C2

C_len        //the byte length of C

deB          //private key of user B

IDB          //identification of userB

EncID        //encryption identification,0:stream cipher  1:block cipher

k1_len       //the byte length of K1 in block cipher algorithm

k2_len       //the byte length of K2 in MAC algorithm

Output:

M            //message

Mlen:        //the length of message

Return:

0: success

1: asking for memory error

2: element is out of order q

3: R-ate calculation error

4: test if C1 is on G1

A: K1 equals 0

B: compare error of C3

Others:

****************************************************************/

int SM9_Decrypt(unsigned char C[], int C_len, unsigned char deB[], unsigned char *IDB, int EncID,

	int k1_len, int k2_len, unsigned char M[], int * Mlen)

{

	big x, y;

	epoint *C1;

	zzn12 w;

	ecn2 dEB;

	int mlen, klen, Zlen, i, number = 0;

	unsigned char *Z = NULL, *K = NULL, *K1 = NULL, u[SM3_len / 8];

	x = mirvar(0); y = mirvar(0);

	dEB.x.a = mirvar(0); dEB.x.b = mirvar(0); dEB.y.a = mirvar(0); dEB.y.b = mirvar(0);

	dEB.z.a = mirvar(0); dEB.z.b = mirvar(0); dEB.marker = MR_EPOINT_INFINITY;

	C1 = epoint_init(); zzn12_init(&w);

	bytes_to_big(BNLEN, C, x); bytes_to_big(BNLEN, C + BNLEN, y);

	bytes128_to_ecn2(deB, &dEB);

	//Step1:get C1,and test if C1 is on G1

	epoint_set(x, y, 1, C1);

	if (Test_Point(C1)) return SM9_C1_NOT_VALID_G1;

	//Step2:w = e(C1, deB)

	if (!ecap(dEB, C1, para_t, X, &w)) return SM9_MY_ECAP_12A_ERR;

	//test if a ZZn12 element is of order q

	if (!member(w, para_t, X)) return SM9_MEMBER_ERR;

	printf("\n*********************** w = e(C1, deB):****************************\n");

	zzn12_ElementPrint(w);

	//Step3:Calculate plaintext

	mlen = C_len - BNLEN * 2 - SM3_len / 8;

	if (EncID == 0)

	{

		//Step3-1:calculate K=KDF(C1||w||IDB,klen)

		klen = mlen + k2_len;

		Zlen = strlen(IDB) + BNLEN * 14;

		Z = (char *)malloc(sizeof(char)*(Zlen + 1));

		K = (char *)malloc(sizeof(char)*(klen + 1));

		if (Z == NULL || K == NULL)  return SM9_ASK_MEMORY_ERR;

		LinkCharZzn12(C, BNLEN * 2, w, Z, Zlen - strlen(IDB));

		memcpy(Z + BNLEN * 14, IDB, strlen(IDB));

		SM3_KDF(Z, Zlen, klen, K);

		printf("\n*****************K=KDF(C1||w||IDB,klen):***********************\n");

		for (i = 0; i<klen; i++) printf("%02x", K[i]);

		//Step:3-2: calculate M=C2^K1,and test if K1==0?

		for (i = 0; i<mlen; i++)

		{

			if (K[i] == 0) number += 1;

			M[i] = C[i + C_len - mlen] ^ K[i];

		}

		if (number == mlen) return SM9_ERR_K1_ZERO;

		*Mlen = mlen;

		//Step4:calculate u=MAC(K2,C2)

		SM9_Enc_MAC(K + mlen, k2_len, &C[C_len - mlen], mlen, u);

		if (memcmp(u, &C[BNLEN * 2], SM3_len / 8)) return SM9_C3_MEMCMP_ERR;

		printf("\n****************************** M:******************************\n");

		for (i = 0; i<mlen; i++) printf("%02x", M[i]);

		free(Z); free(K);

	}

	else

	{

		//Step:3-1: calculate K=KDF(C1||w||IDB,klen)

		klen = k1_len + k2_len;

		Zlen = strlen(IDB) + BNLEN * 14;

		Z = (char *)malloc(sizeof(char)*(Zlen + 1));

		K = (char *)malloc(sizeof(char)*(klen + 1));

		K1 = (char *)malloc(sizeof(char)*(k1_len + 1));

		if (Z == NULL || K == NULL || K1 == NULL) return SM9_ASK_MEMORY_ERR;

		LinkCharZzn12(C, BNLEN * 2, w, Z, Zlen - strlen(IDB));

		memcpy(Z + BNLEN * 14, IDB, strlen(IDB));

		SM3_KDF(Z, Zlen, klen, K);

		printf("\n*****************K=KDF(C1||w||IDB,klen):***********************\n");

		for (i = 0; i<klen; i++) printf("%02x", K[i]);

		//Step:3-2: calculate M=dec(K1,C2),and test if K1==0?

		for (i = 0; i<k1_len; i++)

		{

			if (K[i] == 0) number += 1;

			K1[i] = K[i];

		}

		if (number == k1_len) return SM9_ERR_K1_ZERO;

		SM4_Block_Decrypt(K1, &C[C_len - mlen], mlen, M, Mlen);

		//Step4:calculate u=MAC(K2,C2)

		SM9_Enc_MAC(K + k1_len, k2_len, &C[C_len - mlen], mlen, u);

		if (memcmp(u, &C[BNLEN * 2], SM3_len / 8)) return SM9_C3_MEMCMP_ERR;

		free(Z); free(K); free(K1);

	}

	return 0;

}

/****************************************************************

Function:       SM9_SelfCheck

Description:    SM9 self check

Calls:          MIRACL functions,SM9_Init(),SM9_GenerateEncryptKey(),

SM9_Encrypt,SM9_Decrypt

Called By:

Input:

Output:

Return:         0: self-check success

1: asking for memory error

2: element is out of order q

3: R-ate calculation error

4: test if C1 is on G1

5: base point P1 error

6: base point P2 error

7: Encryption public key generated error

8: Encryption private key generated error

9: encryption error

A: K1 equals 0

B: compare error of C3

C: decryption error

Others:

****************************************************************/

int SM9_SelfCheck()

{

	int MAX_LEN=1024;

	//时间定义

	time_t begin, end;

	//the master private key

	unsigned char KE[32] = { 0x00,0x01,0xED,0xEE,0x37,0x78,0xF4,0x41,0xF8,0xDE,0xA3,0xD9,0xFA,0x0A,0xCC,0x4E,

		0x07,0xEE,0x36,0xC9,0x3F,0x9A,0x08,0x61,0x8A,0xF4,0xAD,0x85,0xCE,0xDE,0x1C,0x22 };

	unsigned char rand[32] = {0x00,0x00,0xAA,0xC0,0x54,0x17,0x79,0xC8,0xFC,0x45,0xE3,0xE2,0xCB,0x25,0xC1,0x2B,

		0x5D,0x25,0x76,0xB2,0x12,0x9A,0xE8,0xBB,0x5E,0xE2,0xCB,0xE5,0xEC,0x9E,0x78,0x5C };

	//standard datas

	unsigned char std_Ppub[64] = { 0x78,0x7E,0xD7,0xB8,0xA5,0x1F,0x3A,0xB8,0x4E,0x0A,0x66,0x00,0x3F,0x32,0xDA,0x5C,

		0x72,0x0B,0x17,0xEC,0xA7,0x13,0x7D,0x39,0xAB,0xC6,0x6E,0x3C,0x80,0xA8,0x92,0xFF,

		0x76,0x9D,0xE6,0x17,0x91,0xE5,0xAD,0xC4,0xB9,0xFF,0x85,0xA3,0x13,0x54,0x90,0x0B,

		0x20,0x28,0x71,0x27,0x9A,0x8C,0x49,0xDC,0x3F,0x22,0x0F,0x64,0x4C,0x57,0xA7,0xB1 };

	unsigned char std_deB[128] = { 0x94,0x73,0x6A,0xCD,0x2C,0x8C,0x87,0x96,0xCC,0x47,0x85,0xE9,0x38,0x30,0x1A,0x13,

		0x9A,0x05,0x9D,0x35,0x37,0xB6,0x41,0x41,0x40,0xB2,0xD3,0x1E,0xEC,0xF4,0x16,0x83,

		0x11,0x5B,0xAE,0x85,0xF5,0xD8,0xBC,0x6C,0x3D,0xBD,0x9E,0x53,0x42,0x97,0x9A,0xCC,

		0xCF,0x3C,0x2F,0x4F,0x28,0x42,0x0B,0x1C,0xB4,0xF8,0xC0,0xB5,0x9A,0x19,0xB1,0x58,

		0x7A,0xA5,0xE4,0x75,0x70,0xDA,0x76,0x00,0xCD,0x76,0x0A,0x0C,0xF7,0xBE,0xAF,0x71,

		0xC4,0x47,0xF3,0x84,0x47,0x53,0xFE,0x74,0xFA,0x7B,0xA9,0x2C,0xA7,0xD3,0xB5,0x5F,

		0x27,0x53,0x8A,0x62,0xE7,0xF7,0xBF,0xB5,0x1D,0xCE,0x08,0x70,0x47,0x96,0xD9,0x4C,

		0x9D,0x56,0x73,0x4F,0x11,0x9E,0xA4,0x47,0x32,0xB5,0x0E,0x31,0xCD,0xEB,0x75,0xC1 };

	unsigned char std_C_stream[116] = { 0x24,0x45,0x47,0x11,0x64,0x49,0x06,0x18,0xE1,0xEE,0x20,0x52,0x8F,0xF1,0xD5,0x45,

		0xB0,0xF1,0x4C,0x8B,0xCA,0xA4,0x45,0x44,0xF0,0x3D,0xAB,0x5D,0xAC,0x07,0xD8,0xFF,

		0x42,0xFF,0xCA,0x97,0xD5,0x7C,0xDD,0xC0,0x5E,0xA4,0x05,0xF2,0xE5,0x86,0xFE,0xB3,

		0xA6,0x93,0x07,0x15,0x53,0x2B,0x80,0x00,0x75,0x9F,0x13,0x05,0x9E,0xD5,0x9A,0xC0,

		0xBA,0x67,0x23,0x87,0xBC,0xD6,0xDE,0x50,0x16,0xA1,0x58,0xA5,0x2B,0xB2,0xE7,0xFC,

		0x42,0x91,0x97,0xBC,0xAB,0x70,0xB2,0x5A,0xFE,0xE3,0x7A,0x2B,0x9D,0xB9,0xF3,0x67,

		0x1B,0x5F,0x5B,0x0E,0x95,0x14,0x89,0x68,0x2F,0x3E,0x64,0xE1,0x37,0x8C,0xDD,0x5D,

		0xA9,0x51,0x3B,0x1C };

	unsigned char std_C_cipher[128] = { 0x24,0x45,0x47,0x11,0x64,0x49,0x06,0x18,0xE1,0xEE,0x20,0x52,0x8F,0xF1,0xD5,0x45,

		0xB0,0xF1,0x4C,0x8B,0xCA,0xA4,0x45,0x44,0xF0,0x3D,0xAB,0x5D,0xAC,0x07,0xD8,0xFF,

		0x42,0xFF,0xCA,0x97,0xD5,0x7C,0xDD,0xC0,0x5E,0xA4,0x05,0xF2,0xE5,0x86,0xFE,0xB3,

		0xA6,0x93,0x07,0x15,0x53,0x2B,0x80,0x00,0x75,0x9F,0x13,0x05,0x9E,0xD5,0x9A,0xC0,

		0xFD,0x3C,0x98,0xDD,0x92,0xC4,0x4C,0x68,0x33,0x26,0x75,0xA3,0x70,0xCC,0xEE,0xDE,

		0x31,0xE0,0xC5,0xCD,0x20,0x9C,0x25,0x76,0x01,0x14,0x9D,0x12,0xB3,0x94,0xA2,0xBE,

		0xE0,0x5B,0x6F,0xAC,0x6F,0x11,0xB9,0x65,0x26,0x8C,0x99,0x4F,0x00,0xDB,0xA7,0xA8,

		0xBB,0x00,0xFD,0x60,0x58,0x35,0x46,0xCB,0xDF,0x46,0x49,0x25,0x08,0x63,0xF1,0x0A };

	unsigned char *std_message = "Chinese IBE standard";

	unsigned char hid[] = { 0x03 };

	unsigned char *IDA = "Alice", *IDB = "Bob";

	unsigned char Ppub[64], deB[128];

	unsigned char message[1000], C[1000];

	int M_len, C_len;//M_len the length of message //C_len the length of C

	int k1_len = 16, k2_len = 32;

	int EncID = 1;//0,stream  //1 block

	int tmp, i;

	big ke;

	tmp = SM9_Init();

	if (tmp != 0) return tmp;

	ke = mirvar(0);

	bytes_to_big(32, KE, ke);

	printf("\n***********************SM9 密钥生成***************************\n");

	printf("用户A的ID号为：%s\n用户B的ID号为：%s\n",IDA,IDB);

	tmp = SM9_GenerateEncryptKey(hid, IDB, strlen(IDB), ke, Ppub, deB);

	if (tmp != 0)  return tmp;

	if (memcmp(Ppub, std_Ppub, 64) != 0)

		return SM9_GEPUB_ERR;

	if (memcmp(deB, std_deB, 128) != 0)

		return SM9_GEPRI_ERR;

	printf("\n***********************SM9 加密算法**************************\n");

	printf("要加密的明文消息为：%s\n",std_message);

	begin = clock();

	tmp = SM9_Encrypt(hid, IDB, std_message, strlen(std_message), rand, EncID, k1_len, k2_len, Ppub, C, &C_len);

	end = clock();

	printf("\n\n\t\t\t加密时间: %f seconds\n", (double)(end - begin) / CLOCKS_PER_SEC);

	if (tmp != 0) return tmp;

	printf("\n******************************密文为:************************************\n");

		for (i = 0; i<C_len; i++) printf("%02x", C[i]);

	if (EncID == 0) tmp = memcmp(C, std_C_stream,C_len); else tmp=memcmp(C,std_C_cipher,C_len);

	if (tmp) return SM9_ENCRYPT_ERR;

	printf("\n\n");

	printf("\n**********************SM9 解密算法**************************\n");

	begin = clock();

	tmp = SM9_Decrypt(std_C_cipher, 128, deB, IDB, 2, k1_len, k2_len, message, &M_len);

	end = clock();

	printf("\n");

	message[M_len] = '\0';

	printf("明文：%s\n",message);

	if (tmp != 0)

		return tmp;

	if (memcmp(message, std_message, M_len) != 0)

		return SM9_DECRYPT_ERR;

	printf("\n\n\t\t\t解密时间: %f seconds\n", (double)(end - begin) / CLOCKS_PER_SEC);

	printf("\n");

	return 0;

}

完整代码见github

参考文献

1、国标—SM9-加解密

2、密码学-基础理论与应用（李子臣著）

3、商用密码检测中心-源码下载

SM9-加解密的更多相关文章

  1. Java 加解密 AES DES TripleDes

    package xxx.common.util; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import javax.crypt ...

  2. Java 加解密技术系列文章

    Java 加解密技术系列之 总结 Java 加解密技术系列之 DH Java 加解密技术系列之 RSA Java 加解密技术系列之 PBE Java 加解密技术系列之 AES Java 加解密技术系列 ...

  3. C#微信公众号开发系列教程三（消息体签名及加解密）

    http://www.cnblogs.com/zskbll/p/4139039.html C#微信公众号开发系列教程一(调试环境部署) C#微信公众号开发系列教程一(调试环境部署续:vs远程调试) C ...

  4. POCO库——Foundation组件之加解密Crypt

    加解密Crypt:内部提供多种加解密方式.信息摘要提取.随机数产生等,具体的算法内部实现不做研究学习: DigestEngine.h :DigestEngine类作为各种摘要提取的基类,提供必要的接口 ...

  5. .net core中使用openssl的公钥私钥进行加解密

    这篇博文分享的是 C#中使用OpenSSL的公钥加密/私钥解密 一文中的解决方法在 .net core 中的改进.之前的博文针对的是 .NET Framework ,加解密用的是 RSACryptoS ...

  6. rsa互通密钥对生成及互通加解密(c#,java,php)

    摘要 在数据安全上rsa起着非常大的作用,特别是数据网络通讯的安全上.当异构系统在数据网络通讯上对安全性有所要求时,rsa将作为其中的一种选择,此时rsa的互通性就显得尤为重要了. 本文参考网络资料, ...

  7. 两种JavaScript的AES加密方式（可与Java相互加解密）

    由于JavaScript属于弱类型脚本语言,因此当其与强类型的后台语言进行数据交互时会产生各种问题,特别是加解密的操作.本人由于工作中遇到用js与Java进行相互加解密的问题,在网上查了很多资料及代码 ...

  8. iOS,信息加解密

    1.AES加解密 AES加解密 // //  AESEncryptAndDecrypt.h //  NSData扩展方法,用于处理aes加解密 // //  Created by Vie on 16/ ...

  9. C# DES进行加解密

    DES加解密 /// 进行DES加密. /// </summary> /// <param name="pToEncrypt">要加密的字符串.</p ...

  10. DES，AeS加解密，MD5，SHA加密

    1.DES一共就有4个参数参与运作:明文.密文.密钥.向量.其中这4者的关系可以理解为: 密文=明文+密钥+向量: 明文=密文-密钥-向量: 为什么要向量这个参数呢?因为如果有一篇文章,有几个词重复, ...

随机推荐

  1. openEuler搭建k8s(1.28.2版本)

    目录 k8s搭建(1.28.2版本) 1. 安装containerd 1.1 下载tar包 1.2 编写服务单元文件 2. 安装runc 3. 安装cni插件 3.1 下载文件 3.2 设置crict ...

  2. 人形机器人-强化学习算法-PPO算法的实现细节是否会对算法性能有大的影响.

    PPO算法是强化学习算法中目前应用最广的算法,虽然这个算法是2017年发表的,但是至今在整个AI领域下的agent子领域中这个算法都是最主要的强化学习算法(至少目前还没有之一),这个算法尤其在Chat ...

  3. dotnet学习笔记-专题06-过滤器和中间件-01

    1. 基本概念 在ASP.NET Core中,中间件和过滤器都是处理HTTP请求的重要组件,但它们在应用中的位置.作用范围以及使用方式有所不同. 1.1 中间件和过滤器的区别 1.1.1 中间件 位置 ...

  4. Impala学习--代码生成（Code Generation）

    代码生成 (Code Generation) Table of Contents 1 概述 2 为何使用代码生成 3 llvm 4 Impala使用IR 5 示例 6 总结 1 概述 Cloudera ...

  5. 【解决方案】Error running,Command line is too long

    一.现象 IDEA 提示 Error running,Command line is too long 二.原因 Java 命令行启动举例如下图,当命令行字符过多的时候,就会出现 Error runn ...

  6. PL/SQL中文乱码修正

    我根据需求,,需要修改 数据库的部分表格的部分字段,然而在Update的时候,出现了中文乱码(Type字段). 此时,我用的是客户端,服务器没有安装,在另一台机器上,所以,我需要做的是修改客户端编码: ...

  7. ES6 面试题

    新增了哪些属性? 新增块级作用域:let.const 新增数据类型:Symbol 表示独一无二的值 新增数据结构: Set,类似数组,所有数据是唯一的: Map,键值对的结合,传统的 Object 只 ...

  8. OpenLens 6.3.0 无法查案日志和进入 Pod Shell 解决方法

    原因 OpenLens 6.3.0开始移除了Pod的查看日志和进入Pod Shell按钮,无法查看日志和进入Pod操作. 解决办法 OpenLens 6.3.0开始这两个功能以插件形式提供,需下载op ...

  9. docker-安装Oracle11g

    获取镜像 在线   docker pull oracleinanutshell/oracle-xe-11g 离线 tar包下载:链接: https://pan.baidu.com/s/1bRp6mSq ...

  10. 启用Linux防火墙日志记录和分析功能

    防火墙的基本功能是阻止来自可疑网络/来源的连接.它会检查所有连接的源地址.目的地址和端口,并决定是否允许或阻止流量.防火墙的每个操作都会记录为日志数据.监控和分析这些日志对于保护您的网络免受攻击至关重 ...