C++ BN_lshift函數代碼示例

本文整理匯總了C++中BN_lshift函數的典型用法代碼示例。如果您正苦於以下問題：C++ BN_lshift函數的具體用法？C++ BN_lshift怎麽用？C++ BN_lshift使用的例子？那麽, 這裏精選的函數代碼示例或許可以為您提供幫助。

在下文中一共展示了BN_lshift函數的15個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C++代碼示例。

示例1: BN_solinas2bn

int BN_solinas2bn(const BN_SOLINAS *solinas, BIGNUM *bn)
{
	int ret = 0;
	BIGNUM *tmp = NULL;

	if (!solinas || !bn) {
		BNerr(BN_F_BN_SOLINAS2BN, ERR_R_MALLOC_FAILURE);
		return 0;
	}

	if (solinas->b <= 0 || solinas->a <= solinas->b
		|| (solinas->s != 1 && solinas->s != -1)
		|| (solinas->c != 1 && solinas->c != -1)) {
		BNerr(BN_F_BN_SOLINAS2BN, BN_R_INVALID_SOLINAS_PARAMETERS);
		return 0;
	}

	if (!(tmp = BN_new())) {
		BNerr(BN_F_BN_SOLINAS2BN, ERR_R_MALLOC_FAILURE);
		goto end;
	}

	BN_one(tmp);

	if (!BN_lshift(bn, tmp, solinas->a)) {
		BNerr(BN_F_BN_SOLINAS2BN, ERR_R_BN_LIB);
		goto end;
	}

	if (!BN_lshift(tmp, tmp, solinas->b)) {
		BNerr(BN_F_BN_SOLINAS2BN, ERR_R_BN_LIB);
		goto end;
	}

	if (!BN_add_word(tmp, solinas->c)) {
		BNerr(BN_F_BN_SOLINAS2BN, ERR_R_BN_LIB);
		goto end;
	}

	if (solinas->s > 0) {
		if (!BN_add(bn, bn, tmp)) {
			BNerr(BN_F_BN_SOLINAS2BN, ERR_R_BN_LIB);
			goto end;
		}
	} else {
		if (!BN_sub(bn, bn, tmp)) {
			BNerr(BN_F_BN_SOLINAS2BN, ERR_R_BN_LIB);
			goto end;
		}
	}

	/* check if it is a prime */

	ret = 1;
end:
	BN_free(tmp);
	return ret;
}

開發者ID:zsdev2015，項目名稱:GmSSL，代碼行數:58，代碼來源:bn_solinas.c

示例2: BN_mod

/* rem != m */
int BN_mod(BIGNUM *rem, const BIGNUM *m, const BIGNUM *d, BN_CTX *ctx)
{
#if 0 /* The old slow way */
	int i, nm, nd;
	BIGNUM *dv;

	if(BN_ucmp(m, d) < 0)
		{ return ((BN_copy(rem, m) == NULL) ? 0 : 1); }

	BN_CTX_start(ctx);
	dv = BN_CTX_get(ctx);

	if(!BN_copy(rem, m)) { goto err; }

	nm = BN_num_bits(rem);
	nd = BN_num_bits(d);
	if(!BN_lshift(dv, d, nm - nd)) { goto err; }
	for(i = nm - nd; i >= 0; i--)
	{
		if(BN_cmp(rem, dv) >= 0)
		{
			if(!BN_sub(rem, rem, dv)) { goto err; }
		}
		if(!BN_rshift1(dv, dv)) { goto err; }
	}
	BN_CTX_end(ctx);
	return (1);
err:
	BN_CTX_end(ctx);
	return (0);
#else
	return (BN_div(NULL, rem, m, d, ctx));
#endif
}

開發者ID:FFTEAM，項目名稱:oscam，代碼行數:35，代碼來源:bn_div.c

示例3: BN_div_word

BN_ULONG BN_div_word(BIGNUM *a, BN_ULONG w)
  {
  BN_ULONG ret = 0;
  int i, j;

  bn_check_top(a);
  w &= BN_MASK2;

  if (!w)
    /* actually this an error (division by zero) */
    return (BN_ULONG)-1;
  if (a->top == 0)
    return 0;

  /* normalize input (so bn_div_words doesn't complain) */
  j = BN_BITS2 - BN_num_bits_word(w);
  w <<= j;
  if (!BN_lshift(a, a, j))
    return (BN_ULONG)-1;

  for (i=a->top-1; i>=0; i--)
    {
    BN_ULONG l,d;
    
    l=a->d[i];
    d=bn_div_words(ret,l,w);
    ret=(l-((d*w)&BN_MASK2))&BN_MASK2;
    a->d[i]=d;
    }
  if ((a->top > 0) && (a->d[a->top-1] == 0))
    a->top--;
  ret >>= j;
  bn_check_top(a);
  return(ret);
  }

開發者ID:yyyyyao，項目名稱:Slicer3-lib-mirrors，代碼行數:35，代碼來源:bn_word.c

示例4: BN_div

int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, const BIGNUM *d,
	   BN_CTX *ctx)
	{
	int i,nm,nd;
	int ret = 0;
	BIGNUM *D;

	bn_check_top(m);
	bn_check_top(d);
	if (BN_is_zero(d))
		{
		BNerr(BN_F_BN_DIV,BN_R_DIV_BY_ZERO);
		return(0);
		}

	if (BN_ucmp(m,d) < 0)
		{
		if (rem != NULL)
			{ if (BN_copy(rem,m) == NULL) return(0); }
		if (dv != NULL) BN_zero(dv);
		return(1);
		}

	BN_CTX_start(ctx);
	D = BN_CTX_get(ctx);
	if (dv == NULL) dv = BN_CTX_get(ctx);
	if (rem == NULL) rem = BN_CTX_get(ctx);
	if (D == NULL || dv == NULL || rem == NULL)
		goto end;

	nd=BN_num_bits(d);
	nm=BN_num_bits(m);
	if (BN_copy(D,d) == NULL) goto end;
	if (BN_copy(rem,m) == NULL) goto end;

	/* The next 2 are needed so we can do a dv->d[0]|=1 later
	 * since BN_lshift1 will only work once there is a value :-) */
	BN_zero(dv);
	if(bn_wexpand(dv,1) == NULL) goto end;
	dv->top=1;

	if (!BN_lshift(D,D,nm-nd)) goto end;
	for (i=nm-nd; i>=0; i--)
		{
		if (!BN_lshift1(dv,dv)) goto end;
		if (BN_ucmp(rem,D) >= 0)
			{
			dv->d[0]|=1;
			if (!BN_usub(rem,rem,D)) goto end;
			}
/* CAN IMPROVE (and have now :=) */
		if (!BN_rshift1(D,D)) goto end;
		}
	rem->neg=BN_is_zero(rem)?0:m->neg;
	dv->neg=m->neg^d->neg;
	ret = 1;
 end:
	BN_CTX_end(ctx);
	return(ret);
	}

開發者ID:EddieGarmon，項目名稱:netduino-netmf，代碼行數:60，代碼來源:bn_div.cpp

示例5: test_div

int
test_div(BIO *bp, BN_CTX *ctx)
{
	BIGNUM a, b,c, d, e;
	int i;
	int rc = 1;

	BN_init(&a);
	BN_init(&b);
	BN_init(&c);
	BN_init(&d);
	BN_init(&e);

	for (i = 0; i < num0 + num1; i++) {
		if (i < num1) {
			BN_bntest_rand(&a, 400, 0, 0);
			BN_copy(&b, &a);
			BN_lshift(&a, &a, i);
			BN_add_word(&a, i);
		} else
			BN_bntest_rand(&b, 50 + 3*(i - num1), 0, 0);
		a.neg = rand_neg();
		b.neg = rand_neg();
		BN_div(&d, &c, &a, &b, ctx);
		if (bp != NULL) {
			if (!results) {
				BN_print(bp, &a);
				BIO_puts(bp, " / ");
				BN_print(bp, &b);
				BIO_puts(bp, " - ");
			}
			BN_print(bp, &d);
			BIO_puts(bp, "\n");

			if (!results) {
				BN_print(bp, &a);
				BIO_puts(bp, " % ");
				BN_print(bp, &b);
				BIO_puts(bp, " - ");
			}
			BN_print(bp, &c);
			BIO_puts(bp, "\n");
		}
		BN_mul(&e, &d, &b, ctx);
		BN_add(&d, &e, &c);
		BN_sub(&d, &d, &a);
		if (!BN_is_zero(&d)) {
			fprintf(stderr, "Division test failed!\n");
			rc = 0;
			break;
		}
	}
	BN_free(&a);
	BN_free(&b);
	BN_free(&c);
	BN_free(&d);
	BN_free(&e);
	return (rc);
}

開發者ID:NSGod，項目名稱:openbsd，代碼行數:59，代碼來源:bntest.c

示例6: hit2hit_key

/*
 * \fn hit2hit_key
 *
 * \param hit		128-bit Host Identity Tag
 * \param hit_key	buffer for storing HIT_KEY; should be DHT_VAL_SIZE long
 *
 * \brief Create a HIT_KEY from a HIT by taking the middle 100 bits and adding
 *        padding.
 */
void hit2hit_key(hip_hit *hit, __u8 *hit_key)
{
  BIGNUM *hk = BN_bin2bn((const unsigned char *)hit, HIT_SIZE, NULL);
  BN_lshift(hk, hk, 28);       /* truncate to 100-bit number */
  memset(hit_key, 0, DHT_KEY_SIZE);
  bn2bin_safe(hk, hit_key, 16);       /* lower 28-bits now zeroes */
  BN_free(hk);
}

開發者ID:carriercomm，項目名稱:openhip，代碼行數:17，代碼來源:hip_dht.c

示例7: test_lshift

int test_lshift(BIO *bp,BN_CTX *ctx,BIGNUM *a_)
	{
	BIGNUM *a,*b,*c,*d;
	int i;

	b=BN_new();
	c=BN_new();
	d=BN_new();
	BN_one(c);

	if(a_)
	    a=a_;
	else
	    {
	    a=BN_new();
	    BN_bntest_rand(a,200,0,0); /**/
	    a->neg=rand_neg();
	    }
	for (i=0; i<num0; i++)
		{
		BN_lshift(b,a,i+1);
		BN_add(c,c,c);
		if (bp != NULL)
			{
			if (!results)
				{
				BN_print(bp,a);
				BIO_puts(bp," * ");
				BN_print(bp,c);
				BIO_puts(bp," - ");
				}
			BN_print(bp,b);
			BIO_puts(bp,"\n");
			}
		BN_mul(d,a,c,ctx);
		BN_sub(d,d,b);
		if(!BN_is_zero(d))
		    {
		    fprintf(stderr,"Left shift test failed!\n");
		    fprintf(stderr,"a=");
		    BN_print_fp(stderr,a);
		    fprintf(stderr,"\nb=");
		    BN_print_fp(stderr,b);
		    fprintf(stderr,"\nc=");
		    BN_print_fp(stderr,c);
		    fprintf(stderr,"\nd=");
		    BN_print_fp(stderr,d);
		    fprintf(stderr,"\n");
		    return 0;
		    }
		}
	BN_free(a);
	BN_free(b);
	BN_free(c);
	BN_free(d);
	return(1);
	}

開發者ID:froggatt，項目名稱:edimax-br-6528n，代碼行數:57，代碼來源:bntest.c

示例8: Java_java_math_NativeBN_BN_1shift

extern "C" void Java_java_math_NativeBN_BN_1shift(JNIEnv* env, jclass, jlong r, jlong a, int n) {
  if (!twoValidHandles(env, r, a)) return;
  if (n >= 0) {
    BN_lshift(toBigNum(r), toBigNum(a), n);
  } else {
    BN_rshift(toBigNum(r), toBigNum(a), -n);
  }
  throwExceptionIfNecessary(env);
}

開發者ID:AlexeyBychkov，項目名稱:robovm，代碼行數:9，代碼來源:java_math_NativeBN.cpp

示例9: bn_check_top

static BIGNUM *euclid(BIGNUM *a, BIGNUM *b)
	{
	BIGNUM *t;
	int shifts=0;

	bn_check_top(a);
	bn_check_top(b);

	/* 0 <= b <= a */
	while (!BN_is_zero(b))
		{
		/* 0 < b <= a */

		if (BN_is_odd(a))
			{
			if (BN_is_odd(b))
				{
				if (!BN_sub(a,a,b)) goto err;
				if (!BN_rshift1(a,a)) goto err;
				if (BN_cmp(a,b) < 0)
					{ t=a; a=b; b=t; }
				}
			else		/* a odd - b even */
				{
				if (!BN_rshift1(b,b)) goto err;
				if (BN_cmp(a,b) < 0)
					{ t=a; a=b; b=t; }
				}
			}
		else			/* a is even */
			{
			if (BN_is_odd(b))
				{
				if (!BN_rshift1(a,a)) goto err;
				if (BN_cmp(a,b) < 0)
					{ t=a; a=b; b=t; }
				}
			else		/* a even - b even */
				{
				if (!BN_rshift1(a,a)) goto err;
				if (!BN_rshift1(b,b)) goto err;
				shifts++;
				}
			}
		/* 0 <= b <= a */
		}

	if (shifts)
		{
		if (!BN_lshift(a,a,shifts)) goto err;
		}
	bn_check_top(a);
	return(a);
err:
	return(NULL);
	}

開發者ID:RyunosukeOno，項目名稱:rayjack，代碼行數:56，代碼來源:bn_gcd.c

示例10: test_div

int test_div(BIO *bp, BN_CTX *ctx)
{
    BIGNUM *a, *b, *c, *d, *e;
    int i;

    a = BN_new();
    b = BN_new();
    c = BN_new();
    d = BN_new();
    e = BN_new();

    for (i = 0; i < num0 + num1; i++) {
        if (i < num1) {
            BN_bntest_rand(a, 400, 0, 0);
            BN_copy(b, a);
            BN_lshift(a, a, i);
            BN_add_word(a, i);
        } else
            BN_bntest_rand(b, 50 + 3 * (i - num1), 0, 0);
        a->neg = rand_neg();
        b->neg = rand_neg();
        BN_div(d, c, a, b, ctx);
        if (bp != NULL) {
            if (!results) {
                BN_print(bp, a);
                BIO_puts(bp, " / ");
                BN_print(bp, b);
                BIO_puts(bp, " - ");
            }
            BN_print(bp, d);
            BIO_puts(bp, "\n");

            if (!results) {
                BN_print(bp, a);
                BIO_puts(bp, " % ");
                BN_print(bp, b);
                BIO_puts(bp, " - ");
            }
            BN_print(bp, c);
            BIO_puts(bp, "\n");
        }
        BN_mul(e, d, b, ctx);
        BN_add(d, e, c);
        BN_sub(d, d, a);
        if (!BN_is_zero(d)) {
            fprintf(stderr, "Division test failed!\n");
            return 0;
        }
    }
    BN_free(a);
    BN_free(b);
    BN_free(c);
    BN_free(d);
    BN_free(e);
    return (1);
}

開發者ID:Adallom，項目名稱:openssl，代碼行數:56，代碼來源:bntest.c

示例11: fermat_question_ask

static RSA *
fermat_question_ask(const RSA *rsa)
{
  BIGNUM
    *a = BN_new(),
    *b = BN_new(),
    *a2 = BN_new(),
    *b2 = BN_new();
  BIGNUM *n = rsa->n;
  BIGNUM
    *tmp = BN_new(),
    *rem = BN_new(),
    *dssdelta = BN_new();
  BN_CTX *ctx = BN_CTX_new();
  RSA *ret = NULL;

  BN_sqrtmod(tmp, rem, n, ctx);
  /* Δ = |p - q| = |a + b - a + b| = |2b| > √N  2⁻¹⁰⁰ */
  /* BN_rshift(dssdelta, tmp, 101); */
  BN_one(dssdelta);
  BN_lshift(dssdelta, dssdelta, BN_num_bits(n) / 4 + 10);

  BN_copy(a, tmp);
  BN_sqr(a2, a, ctx);

  do {
    /* a² += 2a + 1 */
    BN_lshift1(tmp, a);
    BN_uiadd1(tmp);
    BN_add(a2, a2, tmp);
    /* a += 1 */
    BN_uiadd1(a);
    /* b² = a² - N */
    BN_usub(b2, a2, n);
    /* b */
    BN_sqrtmod(b, rem, b2, ctx);
  } while (!BN_is_zero(rem) && BN_cmp(b, dssdelta) < 1);

  if (BN_is_zero(rem)) {
    BN_uadd(a, a, b);
    ret = qa_RSA_recover(rsa, a, ctx);
  }

  BN_CTX_free(ctx);
  BN_free(a);
  BN_free(b);
  BN_free(a2);
  BN_free(b2);
  BN_free(dssdelta);
  BN_free(tmp);
  BN_free(rem);
  return ret;
}

開發者ID:fxfactorial，項目名稱:bachelor，代碼行數:53，代碼來源:fermat.c

示例12: BN_mod_lshift_quick

/* BN_mod_lshift variant that may be used if  a  is non-negative
 * and less than  m */
int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m)
	{
	if (r != a)
		{
		if (BN_copy(r, a) == NULL) return 0;
		}

	while (n > 0)
		{
		int max_shift;
		
		/* 0 < r < m */
		max_shift = BN_num_bits(m) - BN_num_bits(r);
		/* max_shift >= 0 */

		if (max_shift < 0)
			{
			BNerr(BN_F_BN_MOD_LSHIFT_QUICK, BN_R_INPUT_NOT_REDUCED);
			return 0;
			}

		if (max_shift > n)
			max_shift = n;

		if (max_shift)
			{
			if (!BN_lshift(r, r, max_shift)) return 0;
			n -= max_shift;
			}
		else
			{
			if (!BN_lshift1(r, r)) return 0;
			--n;
			}

		/* BN_num_bits(r) <= BN_num_bits(m) */

		if (BN_cmp(r, m) >= 0) 
			{
			if (!BN_sub(r, r, m)) return 0;
			}
		}
	bn_check_top(r);
	
	return 1;
	}

開發者ID:002301，項目名稱:node，代碼行數:48，代碼來源:bn_mod.c

示例13: bu256_bn

void bu256_bn(BIGNUM *vo, const bu256_t *vi)
{
	BN_zero(vo);

	BIGNUM tmp;
	BN_init(&tmp);

	unsigned int i;
	for (i = 0; i < 8; i++) {
		BN_set_word(&tmp, GUINT32_FROM_LE(vi->dword[i]));
		BN_lshift(&tmp, &tmp, (i * 32));

		BN_add(vo, vo, &tmp);
	}

	BN_free(&tmp);
}

開發者ID:colindean，項目名稱:picocoin，代碼行數:17，代碼來源:buint.c

示例14: BN_bin2bn

EC_POINT *embed(const polypseud_ctx *ctx, const unsigned char *data, const size_t len) {
   BIGNUM *t1 = BN_bin2bn(data, len, NULL);
   BIGNUM *x = BN_new();
   BN_mod(x, t1, ctx->p, ctx->bn_ctx);

   EC_POINT *point = EC_POINT_new(ctx->ec_group);
   unsigned char counter = 0;
   int success = 0;
   while(!success) {
       success = EC_POINT_set_compressed_coordinates_GFp(ctx->ec_group, point, x, 1, ctx->bn_ctx);
       if(!success) {
           if(counter == 0) {
               BN_lshift(x, x, 8);
           }
           BN_add(x, x, BN_value_one());
       }
   }
   BN_free(x);
   BN_free(t1);
   return point;
}

開發者ID:polymorphic-pseudonyms，項目名稱:libpolypseud，代碼行數:21，代碼來源:polypseud.c

示例15: get_size

static ssize_t
get_size(const uint8_t *buf, size_t len, BIGNUM *out)
{
    int sz = -1;

    if (len == 0)
        return 1;

    if (BN_set_word(out, 0) <= 0)
        return -ENOMEM;

    for (size_t i = 0; i < len; i++) {
        if (sz > 0) {
            if (BN_lshift(out, out, 8) <= 0)
                return -ENOMEM;

            if (BN_add_word(out, buf[i]) <= 0)
                return -ENOMEM;
        } else if (sz < 0) {
            if (i == 0) {
                if (IS_ID_SHORT(buf[i]))
                    sz++;
            } else if (IS_ID_LAST(buf[i]))
                sz++;
        } else if (sz == 0) {
            sz = buf[i] & ~BIT8;

            if (IS_LEN_SHORT(buf[i]))
                return BN_set_word(out, sz) > 0 ? 0 : -ENOMEM;

            if (i + 1 == len)
                return sz;
        }
    }

    return sz <= 0 ? 1 : 0;
}

開發者ID:bupt007，項目名稱:deo，代碼行數:37，代碼來源:d2i.c

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