实验一-密码引擎-商用密码算法实现1

SM2

// \file:sm2.c
//SM2 Algorithm
//2011-11-10
//author:goldboar
//email:goldboar@163.com
//depending:opnessl library

//SM2 Standards: http://www.oscca.gov.cn/News/201012/News_1197.htm

#include <limits.h>
#include <openssl/ec.h>
#include <openssl/bn.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/ecdsa.h>
#include <openssl/ecdh.h>
#include "kdf.h"

#define  NID_X9_62_prime_field 406
static void BNPrintf(BIGNUM* bn)
{
    char *p=NULL;
    p=BN_bn2hex(bn);
    printf("%s",p);
    OPENSSL_free(p);
}


static int sm2_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kp, BIGNUM **rp)
{
    BN_CTX   *ctx = NULL;
    BIGNUM     *k = NULL, *r = NULL, *order = NULL, *X = NULL;
    EC_POINT *tmp_point=NULL;
    const EC_GROUP *group;
    int      ret = 0;

    if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL)
    {
        ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_PASSED_NULL_PARAMETER);
        return 0;
    }

    if (ctx_in == NULL) 
    {
        if ((ctx = BN_CTX_new()) == NULL)
        {
            ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_MALLOC_FAILURE);
            return 0;
        }
    }
    else
        ctx = ctx_in;

    k     = BN_new();    /* this value is later returned in *kp */
    r     = BN_new();    /* this value is later returned in *rp */
    order = BN_new();
    X     = BN_new();
    if (!k || !r || !order || !X)
    {
        ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    if ((tmp_point = EC_POINT_new(group)) == NULL)
    {
        ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
        goto err;
    }
    if (!EC_GROUP_get_order(group, order, ctx))
    {
        ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
        goto err;
    }
    
    do
    {
        /* get random k */    
        do
            if (!BN_rand_range(k, order))
            {
                ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ECDSA_R_RANDOM_NUMBER_GENERATION_FAILED);    
                goto err;
            }
        while (BN_is_zero(k));

        /* compute r the x-coordinate of generator * k */
        if (!EC_POINT_mul(group, tmp_point, k, NULL, NULL, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_EC_LIB);
            goto err;
        }
        if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field)
        {
            if (!EC_POINT_get_affine_coordinates_GFp(group,
                tmp_point, X, NULL, ctx))
            {
                ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
                goto err;
            }
        }
        else /* NID_X9_62_characteristic_two_field */
        {
            if (!EC_POINT_get_affine_coordinates_GF2m(group,
                tmp_point, X, NULL, ctx))
            {
                ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP,ERR_R_EC_LIB);
                goto err;
            }
        }
        if (!BN_nnmod(r, X, order, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
            goto err;
        }
    }
    while (BN_is_zero(r));

    /* compute the inverse of k */
//     if (!BN_mod_inverse(k, k, order, ctx))
//     {
//         ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
//         goto err;    
//     }
    /* clear old values if necessary */
    if (*rp != NULL)
        BN_clear_free(*rp);
    if (*kp != NULL) 
        BN_clear_free(*kp);
    /* save the pre-computed values  */
    *rp = r;
    *kp = k;
    ret = 1;
err:
    if (!ret)
    {
        if (k != NULL) BN_clear_free(k);
        if (r != NULL) BN_clear_free(r);
    }
    if (ctx_in == NULL) 
        BN_CTX_free(ctx);
    if (order != NULL)
        BN_free(order);
    if (tmp_point != NULL) 
        EC_POINT_free(tmp_point);
    if (X)
        BN_clear_free(X);
    return(ret);
}


static ECDSA_SIG *sm2_do_sign(const unsigned char *dgst, int dgst_len, const BIGNUM *in_k, const BIGNUM *in_r, EC_KEY *eckey)
{
    int     ok = 0, i;
    BIGNUM *k=NULL, *s, *m=NULL,*tmp=NULL,*order=NULL;
    const BIGNUM *ck;
    BN_CTX     *ctx = NULL;
    const EC_GROUP   *group;
    ECDSA_SIG  *ret;
    //ECDSA_DATA *ecdsa;
    const BIGNUM *priv_key;
    BIGNUM *r,*x=NULL,*a=NULL;    //new added
    //ecdsa    = ecdsa_check(eckey);
    group    = EC_KEY_get0_group(eckey);
    priv_key = EC_KEY_get0_private_key(eckey);
    
    if (group == NULL || priv_key == NULL /*|| ecdsa == NULL*/)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_PASSED_NULL_PARAMETER);
        return NULL;
    }

    ret = ECDSA_SIG_new();
    if (!ret)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    s = ret->s;
    r = ret->r;

    if ((ctx = BN_CTX_new()) == NULL || (order = BN_new()) == NULL ||
        (tmp = BN_new()) == NULL || (m = BN_new()) == NULL || 
        (x = BN_new()) == NULL || (a = BN_new()) == NULL)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (!EC_GROUP_get_order(group, order, ctx))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_EC_LIB);
        goto err;
    }
//     for(i=0;i<dgst_len;i++)
//         printf("%02X",dgst[i]);
//      printf("\n");
    i = BN_num_bits(order);
    /* Need to truncate digest if it is too long: first truncate whole
     * bytes.
     */
    if (8 * dgst_len > i)
        dgst_len = (i + 7)/8;
    if (!BN_bin2bn(dgst, dgst_len, m))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
        goto err;
    }
    /* If still too long truncate remaining bits with a shift */
    if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7)))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
        goto err;
    }
//     fprintf(stdout,"m: ");
//     BNPrintf(m);
//     fprintf(stdout,"\n");
    do
    {
        if (in_k == NULL || in_r == NULL)
        {
            if (!sm2_sign_setup(eckey, ctx, &k, &x))
            {
                ECDSAerr(ECDSA_F_ECDSA_DO_SIGN,ERR_R_ECDSA_LIB);
                goto err;
            }
            ck = k;
        }
        else
        {
            ck  = in_k;
            if (BN_copy(x, in_r) == NULL)
            {
                ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_MALLOC_FAILURE);
                goto err;
            }
        }
        
        //r=(e+x1) mod n
        if (!BN_mod_add_quick(r, m, x, order))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
            goto err;
        }

//         BNPrintf(r);
//         fprintf(stdout,"\n");

        if(BN_is_zero(r) )
            continue;

        BN_add(tmp,r,ck);
        if(BN_ucmp(tmp,order) == 0)
            continue;
        
        if (!BN_mod_mul(tmp, priv_key, r, order, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
            goto err;
        }
        if (!BN_mod_sub_quick(s, ck, tmp, order))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
            goto err;
        }
        BN_one(a);
        //BN_set_word((a),1);

        if (!BN_mod_add_quick(tmp, priv_key, a, order))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
            goto err;
        }
        /* compute the inverse of 1+dA */
        if (!BN_mod_inverse(tmp, tmp, order, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_SIGN_SETUP, ERR_R_BN_LIB);
            goto err;    
        }
//         BNPrintf(tmp);
//         fprintf(stdout,"\n");

        if (!BN_mod_mul(s, s, tmp, order, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_BN_LIB);
            goto err;
        }
        if (BN_is_zero(s))
        {
            /* if k and r have been supplied by the caller
             * don't to generate new k and r values */
            if (in_k != NULL && in_r != NULL)
            {
                ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ECDSA_R_NEED_NEW_SETUP_VALUES);
                goto err;
            }
        }
        else
            /* s != 0 => we have a valid signature */
            break;
    }
    while (1);

    ok = 1;
err:
    if (!ok)
    {
        ECDSA_SIG_free(ret);
        ret = NULL;
    }
    if (ctx)
        BN_CTX_free(ctx);
    if (m)
        BN_clear_free(m);
    if (tmp)
        BN_clear_free(tmp);
    if (order)
        BN_free(order);
    if (k)
        BN_clear_free(k);
    if (x)
        BN_clear_free(x);
    if (a)
        BN_clear_free(a);
    return ret;
}

static int sm2_do_verify(const unsigned char *dgst, int dgst_len,
        const ECDSA_SIG *sig, EC_KEY *eckey)
{
    int ret = -1, i;
    BN_CTX   *ctx;
    BIGNUM   *order, *R,  *m, *X,*t;
    EC_POINT *point = NULL;
    const EC_GROUP *group;
    const EC_POINT *pub_key;

    /* check input values */
    if (eckey == NULL || (group = EC_KEY_get0_group(eckey)) == NULL ||
        (pub_key = EC_KEY_get0_public_key(eckey)) == NULL || sig == NULL)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_MISSING_PARAMETERS);
        return -1;
    }

    ctx = BN_CTX_new();
    if (!ctx)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
        return -1;
    }
    BN_CTX_start(ctx);
    order = BN_CTX_get(ctx);    
    R    = BN_CTX_get(ctx);
    t    = BN_CTX_get(ctx);
    m     = BN_CTX_get(ctx);
    X     = BN_CTX_get(ctx);
    if (!X)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
        goto err;
    }
    
    if (!EC_GROUP_get_order(group, order, ctx))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
        goto err;
    }

    if (BN_is_zero(sig->r)          || BN_is_negative(sig->r) || 
        BN_ucmp(sig->r, order) >= 0 || BN_is_zero(sig->s)  ||
        BN_is_negative(sig->s)      || BN_ucmp(sig->s, order) >= 0)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
        ret = 0;    /* signature is invalid */
        goto err;
    }

    //t =(r+s) mod n
    if (!BN_mod_add_quick(t, sig->s, sig->r,order))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
        goto err;
    }
    if (BN_is_zero(t))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ECDSA_R_BAD_SIGNATURE);
        ret = 0;    /* signature is invalid */
        goto err;
    }
    
    //point = s*G+t*PA
    if ((point = EC_POINT_new(group)) == NULL)
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_MALLOC_FAILURE);
        goto err;
    }
    if (!EC_POINT_mul(group, point, sig->s, pub_key, t, ctx))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
        goto err;
    }
    if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field)
    {
        if (!EC_POINT_get_affine_coordinates_GFp(group,
            point, X, NULL, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
            goto err;
        }
    }
    else /* NID_X9_62_characteristic_two_field */
    {
        if (!EC_POINT_get_affine_coordinates_GF2m(group,
            point, X, NULL, ctx))
        {
            ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_EC_LIB);
            goto err;
        }
    }
     
    i = BN_num_bits(order);
    /* Need to truncate digest if it is too long: first truncate whole
     * bytes.
     */
    if (8 * dgst_len > i)
        dgst_len = (i + 7)/8;
    if (!BN_bin2bn(dgst, dgst_len, m))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
        goto err;
    }
    /* If still too long truncate remaining bits with a shift */
    if ((8 * dgst_len > i) && !BN_rshift(m, m, 8 - (i & 0x7)))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
        goto err;
    }

    /* R = m + X mod order */
    if (!BN_mod_add_quick(R, m, X, order))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_VERIFY, ERR_R_BN_LIB);
        goto err;
    }

    /*  if the signature is correct R is equal to sig->r */
    ret = (BN_ucmp(R, sig->r) == 0);
err:
    BN_CTX_end(ctx);
    BN_CTX_free(ctx);
    if (point)
        EC_POINT_free(point);
    return ret;
}


EC_POINT *sm2_compute_key(const EC_POINT *b_pub_key_r, const EC_POINT *b_pub_key, const BIGNUM *a_r,EC_KEY *a_eckey)
{
    BN_CTX *ctx;
    EC_POINT *tmp=NULL;
    BIGNUM *x=NULL, *y=NULL, *order=NULL,*z=NULL;
    const BIGNUM *priv_key;
    const EC_GROUP* group;
    EC_POINT *ret= NULL;
/*    size_t buflen, len;*/
    unsigned char *buf=NULL;
    int i, j;
    //char *p=NULL;
    BIGNUM *x1,*x2,*t,*h;

    if ((ctx = BN_CTX_new()) == NULL) goto err;
    BN_CTX_start(ctx);
    x = BN_CTX_get(ctx);
    y = BN_CTX_get(ctx);
    order = BN_CTX_get(ctx);
    z = BN_CTX_get(ctx);
    x1 = BN_CTX_get(ctx);
    x2 = BN_CTX_get(ctx);
    t = BN_CTX_get(ctx);
    h = BN_CTX_get(ctx);

    
    priv_key = EC_KEY_get0_private_key(a_eckey);
    if (priv_key == NULL)
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_NO_PRIVATE_VALUE);
        goto err;
    }

    group = EC_KEY_get0_group(a_eckey);
    if ((tmp=EC_POINT_new(group)) == NULL)
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE);
        goto err;
    }

    if (!EC_POINT_mul(group, tmp, a_r, NULL, NULL, ctx)) 
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
        goto err;
    }
    
    if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
    {
        if (!EC_POINT_get_affine_coordinates_GFp(group, tmp, x, NULL, ctx)) 
        {
            ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
            goto err;
        }
    }
    else
    {
        if (!EC_POINT_get_affine_coordinates_GF2m(group, tmp, x, NULL, ctx)) 
        {
            ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
            goto err;
        }
    }
    
    if (!EC_GROUP_get_order(group, order, ctx))
    {
        ECDSAerr(ECDSA_F_ECDSA_DO_SIGN, ERR_R_EC_LIB);
        goto err;
    }
        
    i = BN_num_bits(order);
    j = i/2 -1;
    BN_mask_bits(x,j);
    BN_set_word(y,2);
    BN_set_word(z,j);
    BN_exp(y,y,z,ctx);
    BN_add(x1,x,y);
    
//     fprintf(stdout,"X1=: ");
//     BNPrintf(x1);
//     fprintf(stdout,"\n");

    BN_mod_mul(t,x1,a_r,order,ctx);
    BN_mod_add_quick(t,t,priv_key,order);
// 
//     fprintf(stdout,"ta=: ");
//     BNPrintf(t);
//     fprintf(stdout,"\n");

    
    if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
    {
        if (!EC_POINT_get_affine_coordinates_GFp(group, b_pub_key_r, x, NULL, ctx)) 
        {
            ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
            goto err;
        }
    }
    else
    {
        if (!EC_POINT_get_affine_coordinates_GF2m(group, b_pub_key_r, x, NULL, ctx)) 
        {
            ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
            goto err;
        }
    }

    i = BN_num_bits(order);
    j = i/2 -1;
    BN_mask_bits(x,j);
    BN_set_word(y,2);
    BN_set_word(z,j);
    BN_exp(y,y,z,ctx);
    BN_add(x2,x,y);
    
//     fprintf(stdout,"X2=: ");
//     BNPrintf(x2);
//     fprintf(stdout,"\n");


    //x2*Rb+Pb;
    if (!EC_POINT_mul(group, tmp, NULL,b_pub_key_r,x2,ctx) )
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
        goto err;
    }
    if ((ret=EC_POINT_new(group)) == NULL)
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ERR_R_MALLOC_FAILURE);
        goto err;
    }
    if (!EC_POINT_add(group, ret, b_pub_key, tmp, ctx))
    {
        ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
        goto err;
    }
    if (!EC_POINT_get_affine_coordinates_GFp(group,ret, x, y, ctx)) 
    {
        goto err;
    }
//     fprintf(stdout, "\nTesting x2*Rb+Pb Key Point\n     x = 0x");
//     BNPrintf(x);
//     fprintf(stdout, "\n     y = 0x");
//     BNPrintf( y);
//     fprintf(stdout, "\n");
//     
    if(!EC_GROUP_get_cofactor(group, h, ctx))
    {
        goto err;
    }
    BN_mul(t,t,h,ctx);

    //h*t*(x2*Rb+Pb)
    if (!EC_POINT_mul(group, ret, NULL,ret,t,ctx) ) 
    {
        goto err;
    }
    if (!EC_POINT_get_affine_coordinates_GFp(group,ret, x, y, ctx)) 
    {
        goto err;
    }
//     fprintf(stdout, "\nTesting ret Key Point\n     x = 0x");
//     BNPrintf(x);
//     fprintf(stdout, "\n     y = 0x");
//     BNPrintf( y);
//     fprintf(stdout, "\n");

    
err:
    if (tmp) EC_POINT_free(tmp);
    if (ctx) BN_CTX_end(ctx);
    if (ctx) BN_CTX_free(ctx);
    if (buf) OPENSSL_free(buf);
    return(ret);
}

/** SM2_sign_setup
* precompute parts of the signing operation. 
* \param eckey pointer to the EC_KEY object containing a private EC key
* \param ctx  pointer to a BN_CTX object (may be NULL)
* \param k pointer to a BIGNUM pointer for the inverse of k
* \param rp   pointer to a BIGNUM pointer for x coordinate of k * generator
* \return 1 on success and 0 otherwise
 */

int  SM2_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, BIGNUM **rp)
{
//     ECDSA_DATA *ecdsa = ecdsa_check(eckey);
//     if (ecdsa == NULL)
//         return 0;
    return SM2_sign_setup(eckey, ctx_in, kinvp, rp); 
}
/** SM2_sign_ex
 * computes ECDSA signature of a given hash value using the supplied
 * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
 * \param type this parameter is ignored
 * \param dgst pointer to the hash value to sign
 * \param dgstlen length of the hash value
 * \param sig buffer to hold the DER encoded signature
 * \param siglen pointer to the length of the returned signature
 * \param k optional pointer to a pre-computed inverse k
 * \param rp optional pointer to the pre-computed rp value (see 
 *        ECDSA_sign_setup
 * \param eckey pointer to the EC_KEY object containing a private EC key
 * \return 1 on success and 0 otherwise
 */
int      SM2_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char 
    *sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, 
    EC_KEY *eckey)
{
    ECDSA_SIG *s;
    RAND_seed(dgst, dlen);
    s = sm2_do_sign(dgst, dlen, kinv, r, eckey);
    if (s == NULL)
    {
        *siglen=0;
        return 0;
    }
    *siglen = i2d_ECDSA_SIG(s, &sig);
    ECDSA_SIG_free(s);
    return 1;
}

/** SM2_sign
  * computes ECDSA signature of a given hash value using the supplied
  * private key (note: sig must point to ECDSA_size(eckey) bytes of memory).
  * \param type this parameter is ignored
  * \param dgst pointer to the hash value to sign
  * \param dgstlen length of the hash value
  * \param sig buffer to hold the DER encoded signature
  * \param siglen pointer to the length of the returned signature
  * \param eckey pointer to the EC_KEY object containing a private EC key
  * \return 1 on success and 0 otherwise
 */
int      SM2_sign(int type, const unsigned char *dgst, int dlen, unsigned char 
        *sig, unsigned int *siglen, EC_KEY *eckey)
{

    return SM2_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);

}


/** SM2_verify
  * verifies that the given signature is valid ECDSA signature
  * of the supplied hash value using the specified public key.
  * \param type this parameter is ignored
  * \param dgst pointer to the hash value 
  * \param dgstlen length of the hash value
  * \param sig  pointer to the DER encoded signature
  * \param siglen length of the DER encoded signature
  * \param eckey pointer to the EC_KEY object containing a public EC key
  * \return 1 if the signature is valid, 0 if the signature is invalid and -1 on error
  */
int SM2_verify(int type, const unsigned char *dgst, int dgst_len,
        const unsigned char *sigbuf, int sig_len, EC_KEY *eckey)
 {
    ECDSA_SIG *s;
    int ret=-1;

    s = ECDSA_SIG_new();
    if (s == NULL) return(ret);
    if (d2i_ECDSA_SIG(&s, &sigbuf, sig_len) == NULL) goto err;
    ret=sm2_do_verify(dgst, dgst_len, s, eckey);
err:
    ECDSA_SIG_free(s);
    return(ret);
}

int SM2_DH_key(const EC_GROUP * group, const EC_POINT *b_pub_key_r, const EC_POINT *b_pub_key, const BIGNUM *a_r,EC_KEY *a_eckey,
               unsigned char *outkey,size_t keylen)
{
    EC_POINT *dhpoint = NULL;
    BN_CTX * ctx;
    EC_POINT *P;
    BIGNUM *x, *y;
    int ret = 0;
    unsigned char in[128];
    int inlen;
    int len;

    P = EC_POINT_new(group);
    if (!P ) goto err;
    ctx = BN_CTX_new();
    x = BN_new();
    y = BN_new();
    if (!x || !y ) goto err;
    
    dhpoint = sm2_compute_key(b_pub_key_r,b_pub_key,a_r,a_eckey);

    if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_prime_field) 
    {
        if (!EC_POINT_get_affine_coordinates_GFp(group,dhpoint, x, y, ctx))
        {
            fprintf(stdout, " failed\n");
            goto err;
        }
    }
    else
    {
        if (!EC_POINT_get_affine_coordinates_GF2m(group,dhpoint, x, y, ctx)) 
        {
            ECDHerr(ECDH_F_ECDH_COMPUTE_KEY,ECDH_R_POINT_ARITHMETIC_FAILURE);
            goto err;
        }
    }

//     if (!EC_POINT_get_affine_coordinates_GFp(group,dhpoint, x, y, ctx))
//     {
//         fprintf(stdout, " failed\n");
//         goto err;
//     }
    fprintf(stdout, "\nTesting DH Point\n     Xv = 0x");
    BNPrintf(x);
    fprintf(stdout, "\n     Yv = 0x");
    BNPrintf( y);
    fprintf(stdout, "\n");

    len = BN_bn2bin(x,in);
    inlen =BN_bn2bin(y,in+len);
    inlen = inlen + len;
    ret = x9_63_kdf(EVP_sha256(),in,inlen,keylen,outkey);
    //ret  = 1;
err:
    EC_POINT_free(P);
    EC_POINT_free(dhpoint);
    BN_CTX_free(ctx);

    return ret;
}


SM3

/*
 * SM3 Hash alogrith 
 * thanks to Xyssl
 * author:goldboar
 * email:goldboar@163.com
 * 2011-10-26
 */

//Testing data from SM3 Standards
//http://www.oscca.gov.cn/News/201012/News_1199.htm 
// Sample 1
// Input:"abc"  
// Output:66c7f0f4 62eeedd9 d1f2d46b dc10e4e2 4167c487 5cf2f7a2 297da02b 8f4ba8e0

// Sample 2 
// Input:"abcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcdabcd"
// Outpuf:debe9ff9 2275b8a1 38604889 c18e5a4d 6fdb70e5 387e5765 293dcba3 9c0c5732

#include "sm3.h"
#include <string.h>
#include <stdio.h>

/*
 * 32-bit integer manipulation macros (big endian)
 */
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i)                             \
{                                                       \
    (n) = ( (unsigned long) (b)[(i)    ] << 24 )        \
        | ( (unsigned long) (b)[(i) + 1] << 16 )        \
        | ( (unsigned long) (b)[(i) + 2] <<  8 )        \
        | ( (unsigned long) (b)[(i) + 3]       );       \
}
#endif

#ifndef PUT_ULONG_BE
#define PUT_ULONG_BE(n,b,i)                             \
{                                                       \
    (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
    (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
    (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
    (b)[(i) + 3] = (unsigned char) ( (n)       );       \
}
#endif

/*
 * SM3 context setup
 */
void sm3_starts( sm3_context *ctx )
{
    ctx->total[0] = 0;
    ctx->total[1] = 0;

    ctx->state[0] = 0x7380166F;
    ctx->state[1] = 0x4914B2B9;
    ctx->state[2] = 0x172442D7;
    ctx->state[3] = 0xDA8A0600;
    ctx->state[4] = 0xA96F30BC;
    ctx->state[5] = 0x163138AA;
    ctx->state[6] = 0xE38DEE4D;
    ctx->state[7] = 0xB0FB0E4E;

}

static void sm3_process( sm3_context *ctx, unsigned char data[64] )
{
    unsigned long SS1, SS2, TT1, TT2, W[68],W1[64];
    unsigned long A, B, C, D, E, F, G, H;
    unsigned long T[64];
    unsigned long Temp1,Temp2,Temp3,Temp4,Temp5;
    int j;
#ifdef _DEBUG
    int i;
#endif

//     for(j=0; j < 68; j++)
//         W[j] = 0;
//     for(j=0; j < 64; j++)
//         W1[j] = 0;
    
    for(j = 0; j < 16; j++)
        T[j] = 0x79CC4519;
    for(j =16; j < 64; j++)
        T[j] = 0x7A879D8A;

    GET_ULONG_BE( W[ 0], data,  0 );
    GET_ULONG_BE( W[ 1], data,  4 );
    GET_ULONG_BE( W[ 2], data,  8 );
    GET_ULONG_BE( W[ 3], data, 12 );
    GET_ULONG_BE( W[ 4], data, 16 );
    GET_ULONG_BE( W[ 5], data, 20 );
    GET_ULONG_BE( W[ 6], data, 24 );
    GET_ULONG_BE( W[ 7], data, 28 );
    GET_ULONG_BE( W[ 8], data, 32 );
    GET_ULONG_BE( W[ 9], data, 36 );
    GET_ULONG_BE( W[10], data, 40 );
    GET_ULONG_BE( W[11], data, 44 );
    GET_ULONG_BE( W[12], data, 48 );
    GET_ULONG_BE( W[13], data, 52 );
    GET_ULONG_BE( W[14], data, 56 );
    GET_ULONG_BE( W[15], data, 60 );

#ifdef _DEBUG 
    printf("Message with padding:\n");
    for(i=0; i< 8; i++)
        printf("%08x ",W[i]);
    printf("\n");
    for(i=8; i< 16; i++)
        printf("%08x ",W[i]);
    printf("\n");
#endif

#define FF0(x,y,z) ( (x) ^ (y) ^ (z)) 
#define FF1(x,y,z) (((x) & (y)) | ( (x) & (z)) | ( (y) & (z)))

#define GG0(x,y,z) ( (x) ^ (y) ^ (z)) 
#define GG1(x,y,z) (((x) & (y)) | ( (~(x)) & (z)) )


#define  SHL(x,n) (((x) & 0xFFFFFFFF) << n)
#define ROTL(x,n) (SHL((x),n) | ((x) >> (32 - n)))

#define P0(x) ((x) ^  ROTL((x),9) ^ ROTL((x),17)) 
#define P1(x) ((x) ^  ROTL((x),15) ^ ROTL((x),23)) 

    for(j = 16; j < 68; j++ )
    {
        //W[j] = P1( W[j-16] ^ W[j-9] ^ ROTL(W[j-3],15)) ^ ROTL(W[j - 13],7 ) ^ W[j-6];
        //Why thd release's result is different with the debug's ?
        //Below is okay. Interesting, Perhaps VC6 has a bug of Optimizaiton.
        
        Temp1 = W[j-16] ^ W[j-9];
        Temp2 = ROTL(W[j-3],15);
        Temp3 = Temp1 ^ Temp2;
        Temp4 = P1(Temp3);
        Temp5 =  ROTL(W[j - 13],7 ) ^ W[j-6];
        W[j] = Temp4 ^ Temp5;
    }

#ifdef _DEBUG 
    printf("Expanding message W0-67:\n");
    for(i=0; i<68; i++)
    {
        printf("%08x ",W[i]);
        if(((i+1) % 8) == 0) printf("\n");
    }
    printf("\n");
#endif

    for(j =  0; j < 64; j++)
    {
        W1[j] = W[j] ^ W[j+4];
    }

#ifdef _DEBUG 
    printf("Expanding message W'0-63:\n");
    for(i=0; i<64; i++)
    {
        printf("%08x ",W1[i]);
        if(((i+1) % 8) == 0) printf("\n");
    }
    printf("\n");
#endif

    A = ctx->state[0];
    B = ctx->state[1];
    C = ctx->state[2];
    D = ctx->state[3];
    E = ctx->state[4];
    F = ctx->state[5];
    G = ctx->state[6];
    H = ctx->state[7];
#ifdef _DEBUG       
    printf("j     A       B        C         D         E        F        G       H\n");
    printf("   %08x %08x %08x %08x %08x %08x %08x %08x\n",A,B,C,D,E,F,G,H);
#endif

    for(j =0; j < 16; j++)
    {
        SS1 = ROTL((ROTL(A,12) + E + ROTL(T[j],j)), 7); 
        SS2 = SS1 ^ ROTL(A,12);
        TT1 = FF0(A,B,C) + D + SS2 + W1[j];
        TT2 = GG0(E,F,G) + H + SS1 + W[j];
        D = C;
        C = ROTL(B,9);
        B = A;
        A = TT1;
        H = G;
        G = ROTL(F,19);
        F = E;
        E = P0(TT2);
#ifdef _DEBUG 
        printf("%02d %08x %08x %08x %08x %08x %08x %08x %08x\n",j,A,B,C,D,E,F,G,H);
#endif
    }
    
    for(j =16; j < 64; j++)
    {
        SS1 = ROTL((ROTL(A,12) + E + ROTL(T[j],j)), 7); 
        SS2 = SS1 ^ ROTL(A,12);
        TT1 = FF1(A,B,C) + D + SS2 + W1[j];
        TT2 = GG1(E,F,G) + H + SS1 + W[j];
        D = C;
        C = ROTL(B,9);
        B = A;
        A = TT1;
        H = G;
        G = ROTL(F,19);
        F = E;
        E = P0(TT2);
#ifdef _DEBUG 
        printf("%02d %08x %08x %08x %08x %08x %08x %08x %08x\n",j,A,B,C,D,E,F,G,H);
#endif    
    }

    ctx->state[0] ^= A;
    ctx->state[1] ^= B;
    ctx->state[2] ^= C;
    ctx->state[3] ^= D;
    ctx->state[4] ^= E;
    ctx->state[5] ^= F;
    ctx->state[6] ^= G;
    ctx->state[7] ^= H;
#ifdef _DEBUG 
       printf("   %08x %08x %08x %08x %08x %08x %08x %08x\n",ctx->state[0],ctx->state[1],ctx->state[2],
                                  ctx->state[3],ctx->state[4],ctx->state[5],ctx->state[6],ctx->state[7]);
#endif
}

/*
 * SM3 process buffer
 */
void sm3_update( sm3_context *ctx, unsigned char *input, int ilen )
{
    int fill;
    unsigned long left;

    if( ilen <= 0 )
        return;

    left = ctx->total[0] & 0x3F;
    fill = 64 - left;

    ctx->total[0] += ilen;
    ctx->total[0] &= 0xFFFFFFFF;

    if( ctx->total[0] < (unsigned long) ilen )
        ctx->total[1]++;

    if( left && ilen >= fill )
    {
        memcpy( (void *) (ctx->buffer + left),
                (void *) input, fill );
        sm3_process( ctx, ctx->buffer );
        input += fill;
        ilen  -= fill;
        left = 0;
    }

    while( ilen >= 64 )
    {
        sm3_process( ctx, input );
        input += 64;
        ilen  -= 64;
    }

    if( ilen > 0 )
    {
        memcpy( (void *) (ctx->buffer + left),
                (void *) input, ilen );
    }
}

static const unsigned char sm3_padding[64] =
{
 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

/*
 * SM3 final digest
 */
void sm3_finish( sm3_context *ctx, unsigned char output[32] )
{
    unsigned long last, padn;
    unsigned long high, low;
    unsigned char msglen[8];

    high = ( ctx->total[0] >> 29 )
         | ( ctx->total[1] <<  3 );
    low  = ( ctx->total[0] <<  3 );

    PUT_ULONG_BE( high, msglen, 0 );
    PUT_ULONG_BE( low,  msglen, 4 );

    last = ctx->total[0] & 0x3F;
    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );

    sm3_update( ctx, (unsigned char *) sm3_padding, padn );
    sm3_update( ctx, msglen, 8 );

    PUT_ULONG_BE( ctx->state[0], output,  0 );
    PUT_ULONG_BE( ctx->state[1], output,  4 );
    PUT_ULONG_BE( ctx->state[2], output,  8 );
    PUT_ULONG_BE( ctx->state[3], output, 12 );
    PUT_ULONG_BE( ctx->state[4], output, 16 );
    PUT_ULONG_BE( ctx->state[5], output, 20 );
    PUT_ULONG_BE( ctx->state[6], output, 24 );
    PUT_ULONG_BE( ctx->state[7], output, 28 );
}

/*
 * output = SM3( input buffer )
 */
void sm3( unsigned char *input, int ilen,
           unsigned char output[32] )
{
    sm3_context ctx;

    sm3_starts( &ctx );
    sm3_update( &ctx, input, ilen );
    sm3_finish( &ctx, output );

    memset( &ctx, 0, sizeof( sm3_context ) );
}

/*
 * output = SM3( file contents )
 */
int sm3_file( char *path, unsigned char output[32] )
{
    FILE *f;
    size_t n;
    sm3_context ctx;
    unsigned char buf[1024];

    if( ( f = fopen( path, "rb" ) ) == NULL )
        return( 1 );

    sm3_starts( &ctx );

    while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
        sm3_update( &ctx, buf, (int) n );

    sm3_finish( &ctx, output );

    memset( &ctx, 0, sizeof( sm3_context ) );

    if( ferror( f ) != 0 )
    {
        fclose( f );
        return( 2 );
    }

    fclose( f );
    return( 0 );
}

/*
 * SM3 HMAC context setup
 */
void sm3_hmac_starts( sm3_context *ctx, unsigned char *key, int keylen )
{
    int i;
    unsigned char sum[32];

    if( keylen > 64 )
    {
        sm3( key, keylen, sum );
        keylen = 32;
        //keylen = ( is224 ) ? 28 : 32;
        key = sum;
    }

    memset( ctx->ipad, 0x36, 64 );
    memset( ctx->opad, 0x5C, 64 );

    for( i = 0; i < keylen; i++ )
    {
        ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
        ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
    }

    sm3_starts( ctx);
    sm3_update( ctx, ctx->ipad, 64 );

    memset( sum, 0, sizeof( sum ) );
}

/*
 * SM3 HMAC process buffer
 */
void sm3_hmac_update( sm3_context *ctx, unsigned char *input, int ilen )
{
    sm3_update( ctx, input, ilen );
}

/*
 * SM3 HMAC final digest
 */
void sm3_hmac_finish( sm3_context *ctx, unsigned char output[32] )
{
    int hlen;
    unsigned char tmpbuf[32];

    //is224 = ctx->is224;
    hlen =  32;

    sm3_finish( ctx, tmpbuf );
    sm3_starts( ctx );
    sm3_update( ctx, ctx->opad, 64 );
    sm3_update( ctx, tmpbuf, hlen );
    sm3_finish( ctx, output );

    memset( tmpbuf, 0, sizeof( tmpbuf ) );
}

/*
 * output = HMAC-SM#( hmac key, input buffer )
 */
void sm3_hmac( unsigned char *key, int keylen,
                unsigned char *input, int ilen,
                unsigned char output[32] )
{
    sm3_context ctx;

    sm3_hmac_starts( &ctx, key, keylen);
    sm3_hmac_update( &ctx, input, ilen );
    sm3_hmac_finish( &ctx, output );

    memset( &ctx, 0, sizeof( sm3_context ) );
}

sm3

SM4

/*
 * SM4 Encryption alogrithm (SMS4 algorithm)
 * GM/T 0002-2012 Chinese National Standard ref:http://www.oscca.gov.cn/ 
 * thanks to Xyssl
 * thnaks and refers to http://hi.baidu.com/numax/blog/item/80addfefddfb93e4cf1b3e61.html
 * author:goldboar
 * email:goldboar@163.com
 * 2012-4-20
 */

// Test vector 1
// plain: 01 23 45 67 89 ab cd ef fe dc ba 98 76 54 32 10
// key:   01 23 45 67 89 ab cd ef fe dc ba 98 76 54 32 10
//        round key and temp computing result:
//        rk[ 0] = f12186f9 X[ 0] = 27fad345
//            rk[ 1] = 41662b61 X[ 1] = a18b4cb2
//            rk[ 2] = 5a6ab19a X[ 2] = 11c1e22a
//            rk[ 3] = 7ba92077 X[ 3] = cc13e2ee
//            rk[ 4] = 367360f4 X[ 4] = f87c5bd5
//            rk[ 5] = 776a0c61 X[ 5] = 33220757
//            rk[ 6] = b6bb89b3 X[ 6] = 77f4c297
//            rk[ 7] = 24763151 X[ 7] = 7a96f2eb
//            rk[ 8] = a520307c X[ 8] = 27dac07f
//            rk[ 9] = b7584dbd X[ 9] = 42dd0f19
//            rk[10] = c30753ed X[10] = b8a5da02
//            rk[11] = 7ee55b57 X[11] = 907127fa
//            rk[12] = 6988608c X[12] = 8b952b83
//            rk[13] = 30d895b7 X[13] = d42b7c59
//            rk[14] = 44ba14af X[14] = 2ffc5831
//            rk[15] = 104495a1 X[15] = f69e6888
//            rk[16] = d120b428 X[16] = af2432c4
//            rk[17] = 73b55fa3 X[17] = ed1ec85e
//            rk[18] = cc874966 X[18] = 55a3ba22
//            rk[19] = 92244439 X[19] = 124b18aa
//            rk[20] = e89e641f X[20] = 6ae7725f
//            rk[21] = 98ca015a X[21] = f4cba1f9
//            rk[22] = c7159060 X[22] = 1dcdfa10
//            rk[23] = 99e1fd2e X[23] = 2ff60603
//            rk[24] = b79bd80c X[24] = eff24fdc
//            rk[25] = 1d2115b0 X[25] = 6fe46b75
//            rk[26] = 0e228aeb X[26] = 893450ad
//            rk[27] = f1780c81 X[27] = 7b938f4c
//            rk[28] = 428d3654 X[28] = 536e4246
//            rk[29] = 62293496 X[29] = 86b3e94f
//            rk[30] = 01cf72e5 X[30] = d206965e
//            rk[31] = 9124a012 X[31] = 681edf34
// cypher: 68 1e df 34 d2 06 96 5e 86 b3 e9 4f 53 6e 42 46
//         
// test vector 2
// the same key and plain 1000000 times coumpting 
// plain:  01 23 45 67 89 ab cd ef fe dc ba 98 76 54 32 10
// key:    01 23 45 67 89 ab cd ef fe dc ba 98 76 54 32 10
// cypher: 59 52 98 c7 c6 fd 27 1f 04 02 f8 04 c3 3d 3f 66

#include "sm4.h"
#include <string.h>
#include <stdio.h>

/*
 * 32-bit integer manipulation macros (big endian)
 */
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i)                             \
{                                                       \
    (n) = ( (unsigned long) (b)[(i)    ] << 24 )        \
        | ( (unsigned long) (b)[(i) + 1] << 16 )        \
        | ( (unsigned long) (b)[(i) + 2] <<  8 )        \
        | ( (unsigned long) (b)[(i) + 3]       );       \
}
#endif

#ifndef PUT_ULONG_BE
#define PUT_ULONG_BE(n,b,i)                             \
{                                                       \
    (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
    (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
    (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
    (b)[(i) + 3] = (unsigned char) ( (n)       );       \
}
#endif

/*
 *rotate shift left marco definition
 *
 */
#define  SHL(x,n) (((x) & 0xFFFFFFFF) << n)
#define ROTL(x,n) (SHL((x),n) | ((x) >> (32 - n)))

#define SWAP(a,b) { unsigned long t = a; a = b; b = t; t = 0; }

/*
 * Expanded SM4 S-boxes
 /* Sbox table: 8bits input convert to 8 bits output*/
 
static const unsigned char SboxTable[16][16] = 
{
{0xd6,0x90,0xe9,0xfe,0xcc,0xe1,0x3d,0xb7,0x16,0xb6,0x14,0xc2,0x28,0xfb,0x2c,0x05},
{0x2b,0x67,0x9a,0x76,0x2a,0xbe,0x04,0xc3,0xaa,0x44,0x13,0x26,0x49,0x86,0x06,0x99},
{0x9c,0x42,0x50,0xf4,0x91,0xef,0x98,0x7a,0x33,0x54,0x0b,0x43,0xed,0xcf,0xac,0x62},
{0xe4,0xb3,0x1c,0xa9,0xc9,0x08,0xe8,0x95,0x80,0xdf,0x94,0xfa,0x75,0x8f,0x3f,0xa6},
{0x47,0x07,0xa7,0xfc,0xf3,0x73,0x17,0xba,0x83,0x59,0x3c,0x19,0xe6,0x85,0x4f,0xa8},
{0x68,0x6b,0x81,0xb2,0x71,0x64,0xda,0x8b,0xf8,0xeb,0x0f,0x4b,0x70,0x56,0x9d,0x35},
{0x1e,0x24,0x0e,0x5e,0x63,0x58,0xd1,0xa2,0x25,0x22,0x7c,0x3b,0x01,0x21,0x78,0x87},
{0xd4,0x00,0x46,0x57,0x9f,0xd3,0x27,0x52,0x4c,0x36,0x02,0xe7,0xa0,0xc4,0xc8,0x9e},
{0xea,0xbf,0x8a,0xd2,0x40,0xc7,0x38,0xb5,0xa3,0xf7,0xf2,0xce,0xf9,0x61,0x15,0xa1},
{0xe0,0xae,0x5d,0xa4,0x9b,0x34,0x1a,0x55,0xad,0x93,0x32,0x30,0xf5,0x8c,0xb1,0xe3},
{0x1d,0xf6,0xe2,0x2e,0x82,0x66,0xca,0x60,0xc0,0x29,0x23,0xab,0x0d,0x53,0x4e,0x6f},
{0xd5,0xdb,0x37,0x45,0xde,0xfd,0x8e,0x2f,0x03,0xff,0x6a,0x72,0x6d,0x6c,0x5b,0x51},
{0x8d,0x1b,0xaf,0x92,0xbb,0xdd,0xbc,0x7f,0x11,0xd9,0x5c,0x41,0x1f,0x10,0x5a,0xd8},
{0x0a,0xc1,0x31,0x88,0xa5,0xcd,0x7b,0xbd,0x2d,0x74,0xd0,0x12,0xb8,0xe5,0xb4,0xb0},
{0x89,0x69,0x97,0x4a,0x0c,0x96,0x77,0x7e,0x65,0xb9,0xf1,0x09,0xc5,0x6e,0xc6,0x84},
{0x18,0xf0,0x7d,0xec,0x3a,0xdc,0x4d,0x20,0x79,0xee,0x5f,0x3e,0xd7,0xcb,0x39,0x48}
};

/* System parameter */
static const unsigned long FK[4] = {0xa3b1bac6,0x56aa3350,0x677d9197,0xb27022dc};

/* fixed parameter */
static const unsigned long CK[32] =
{
0x00070e15,0x1c232a31,0x383f464d,0x545b6269,
0x70777e85,0x8c939aa1,0xa8afb6bd,0xc4cbd2d9,
0xe0e7eef5,0xfc030a11,0x181f262d,0x343b4249,
0x50575e65,0x6c737a81,0x888f969d,0xa4abb2b9,
0xc0c7ced5,0xdce3eaf1,0xf8ff060d,0x141b2229,
0x30373e45,0x4c535a61,0x686f767d,0x848b9299,
0xa0a7aeb5,0xbcc3cad1,0xd8dfe6ed,0xf4fb0209,
0x10171e25,0x2c333a41,0x484f565d,0x646b7279
};


/*
 * private function:
 * look up in SboxTable and get the related value.
 * args:    [in] inch: 0x00~0xFF (8 bits unsigned value).
 */
static unsigned char sm4Sbox(unsigned char inch)
{
    unsigned char *pTable = (unsigned char *)SboxTable;
    unsigned char retVal = (unsigned char)(pTable[inch]);
    return retVal;
}

/*
 * private F(Lt) function:
 * "T algorithm" == "L algorithm" + "t algorithm".
 * args:    [in] a: a is a 32 bits unsigned value;
 * return: c: c is calculated with line algorithm "L" and nonline algorithm "t"
 */
static unsigned long sm4Lt(unsigned long ka)
{
    unsigned long bb = 0;
    unsigned long c = 0;
    unsigned char a[4];
    unsigned char b[4];
    PUT_ULONG_BE(ka,a,0)
    b[0] = sm4Sbox(a[0]);
    b[1] = sm4Sbox(a[1]);
    b[2] = sm4Sbox(a[2]);
    b[3] = sm4Sbox(a[3]);
    GET_ULONG_BE(bb,b,0)
    c =bb^(ROTL(bb, 2))^(ROTL(bb, 10))^(ROTL(bb, 18))^(ROTL(bb, 24));
    return c;
}

/*
 * private F function:
 * Calculating and getting encryption/decryption contents.
 * args:    [in] x0: original contents;
 * args:    [in] x1: original contents;
 * args:    [in] x2: original contents;
 * args:    [in] x3: original contents;
 * args:    [in] rk: encryption/decryption key;
 * return the contents of encryption/decryption contents.
 */
static unsigned long sm4F(unsigned long x0, unsigned long x1, unsigned long x2, unsigned long x3, unsigned long rk)
{
    return (x0^sm4Lt(x1^x2^x3^rk));
}


/* private function:
 * Calculating round encryption key.
 * args:    [in] a: a is a 32 bits unsigned value;
 * return: sk[i]: i{0,1,2,3,...31}.
 */
static unsigned long sm4CalciRK(unsigned long ka)
{
    unsigned long bb = 0;
    unsigned long rk = 0;
    unsigned char a[4];
    unsigned char b[4];
    PUT_ULONG_BE(ka,a,0)
    b[0] = sm4Sbox(a[0]);
    b[1] = sm4Sbox(a[1]);
    b[2] = sm4Sbox(a[2]);
    b[3] = sm4Sbox(a[3]);
    GET_ULONG_BE(bb,b,0)
    rk = bb^(ROTL(bb, 13))^(ROTL(bb, 23));
    return rk;
}

static void sm4_setkey( unsigned long SK[32], unsigned char key[16] )
{
    unsigned long MK[4];
    unsigned long k[36];
    unsigned long i = 0;

    GET_ULONG_BE( MK[0], key, 0 );
    GET_ULONG_BE( MK[1], key, 4 );
    GET_ULONG_BE( MK[2], key, 8 );
    GET_ULONG_BE( MK[3], key, 12 );
    k[0] = MK[0]^FK[0];
    k[1] = MK[1]^FK[1];
    k[2] = MK[2]^FK[2];
    k[3] = MK[3]^FK[3];
    for(; i<32; i++)
    {
        k[i+4] = k[i] ^ (sm4CalciRK(k[i+1]^k[i+2]^k[i+3]^CK[i]));
        SK[i] = k[i+4];
    }

}

/*
 * SM4 standard one round processing
 *
 */
static void sm4_one_round( unsigned long sk[32],
                    unsigned char input[16],
                    unsigned char output[16] )
{
    unsigned long i = 0;
    unsigned long ulbuf[36];

    memset(ulbuf, 0, sizeof(ulbuf));
    GET_ULONG_BE( ulbuf[0], input, 0 )
    GET_ULONG_BE( ulbuf[1], input, 4 )
    GET_ULONG_BE( ulbuf[2], input, 8 )
    GET_ULONG_BE( ulbuf[3], input, 12 )
    while(i<32)
    {
        ulbuf[i+4] = sm4F(ulbuf[i], ulbuf[i+1], ulbuf[i+2], ulbuf[i+3], sk[i]);
// #ifdef _DEBUG
//            printf("rk(%02d) = 0x%08x,  X(%02d) = 0x%08x \n",i,sk[i], i, ulbuf[i+4] );
// #endif
        i++;
    }
    PUT_ULONG_BE(ulbuf[35],output,0);
    PUT_ULONG_BE(ulbuf[34],output,4);
    PUT_ULONG_BE(ulbuf[33],output,8);
    PUT_ULONG_BE(ulbuf[32],output,12);
}

/*
 * SM4 key schedule (128-bit, encryption)
 */
void sm4_setkey_enc( sm4_context *ctx, unsigned char key[16] )
{
    ctx->mode = SM4_ENCRYPT;
    sm4_setkey( ctx->sk, key );
}

/*
 * SM4 key schedule (128-bit, decryption)
 */
void sm4_setkey_dec( sm4_context *ctx, unsigned char key[16] )
{
    int i;
    ctx->mode = SM4_ENCRYPT;
    sm4_setkey( ctx->sk, key );
    for( i = 0; i < 16; i ++ )
    {
        SWAP( ctx->sk[ i ], ctx->sk[ 31-i] );
    }
}


/*
 * SM4-ECB block encryption/decryption
 */

void sm4_crypt_ecb( sm4_context *ctx,
                   int mode,
                   int length,
                   unsigned char *input,
                   unsigned char *output)
{
    while( length > 0 )
    {
        sm4_one_round( ctx->sk, input, output );
        input  += 16;
        output += 16;
        length -= 16;
    }

}

/*
 * SM4-CBC buffer encryption/decryption
 */
void sm4_crypt_cbc( sm4_context *ctx,
                    int mode,
                    int length,
                    unsigned char iv[16],
                    unsigned char *input,
                    unsigned char *output )
{
    int i;
    unsigned char temp[16];

    if( mode == SM4_ENCRYPT )
    {
        while( length > 0 )
        {
            for( i = 0; i < 16; i++ )
                output[i] = (unsigned char)( input[i] ^ iv[i] );

            sm4_one_round( ctx->sk, output, output );
            memcpy( iv, output, 16 );

            input  += 16;
            output += 16;
            length -= 16;
        }
    }
    else /* SM4_DECRYPT */
    {
        while( length > 0 )
        {
            memcpy( temp, input, 16 );
            sm4_one_round( ctx->sk, input, output );

            for( i = 0; i < 16; i++ )
                output[i] = (unsigned char)( output[i] ^ iv[i] );

            memcpy( iv, temp, 16 );

            input  += 16;
            output += 16;
            length -= 16;
        }
    }
}

sm4


posted on 2022-04-27 00:07  20191225张文颖  阅读(105)  评论(0编辑  收藏  举报