本文整理汇总了C++中BN_is_negative函数的典型用法代码示例。如果您正苦于以下问题：C++ BN_is_negative函数的具体用法？C++ BN_is_negative怎么用？C++ BN_is_negative使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。
在下文中一共展示了BN_is_negative函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。
示例1: ec_GF2m_simple_mul
/* Computes the sum
* scalar*group->generator + scalars[0]*points[0] + ... + scalars[num-1]*points[num-1]
* gracefully ignoring NULL scalar values.
*/
int ec_GF2m_simple_mul(const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar,
size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *ctx)
{
BN_CTX *new_ctx = NULL;
int ret = 0;
size_t i;
EC_POINT *p=NULL;
EC_POINT *acc = NULL;
if (ctx == NULL)
{
ctx = new_ctx = BN_CTX_new();
if (ctx == NULL)
return 0;
}
/* This implementation is more efficient than the wNAF implementation for 2
* or fewer points. Use the ec_wNAF_mul implementation for 3 or more points,
* or if we can perform a fast multiplication based on precomputation.
*/
if ((scalar && (num > 1)) || (num > 2) || (num == 0 && EC_GROUP_have_precompute_mult(group)))
{
ret = ec_wNAF_mul(group, r, scalar, num, points, scalars, ctx);
goto err;
}
if ((p = EC_POINT_new(group)) == NULL) goto err;
if ((acc = EC_POINT_new(group)) == NULL) goto err;
if (!EC_POINT_set_to_infinity(group, acc)) goto err;
if (scalar)
{
if (!ec_GF2m_montgomery_point_multiply(group, p, scalar, group->generator, ctx)) goto err;
if (BN_is_negative(scalar))
if (!group->meth->invert(group, p, ctx)) goto err;
if (!group->meth->add(group, acc, acc, p, ctx)) goto err;
}
for (i = 0; i < num; i++)
{
if (!ec_GF2m_montgomery_point_multiply(group, p, scalars[i], points[i], ctx)) goto err;
if (BN_is_negative(scalars[i]))
if (!group->meth->invert(group, p, ctx)) goto err;
if (!group->meth->add(group, acc, acc, p, ctx)) goto err;
}
if (!EC_POINT_copy(r, acc)) goto err;
ret = 1;
err:
if (p) EC_POINT_free(p);
if (acc) EC_POINT_free(acc);
if (new_ctx != NULL)
BN_CTX_free(new_ctx);
return ret;
}
开发者ID:Chenhx，项目名称:moai-dev，代码行数:62，代码来源:ec2_mult.c
示例2: OPENSSL_PUT_ERROR
ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
{
ASN1_ENUMERATED *ret;
int len,j;
if (ai == NULL)
ret=M_ASN1_ENUMERATED_new();
else
ret=ai;
if (ret == NULL)
{
OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ASN1_R_NESTED_ASN1_ERROR);
goto err;
}
if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED;
else ret->type=V_ASN1_ENUMERATED;
j=BN_num_bits(bn);
len=((j == 0)?0:((j/8)+1));
if (ret->length < len+4)
{
unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
if (!new_data)
{
OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
goto err;
}
ret->data=new_data;
}
ret->length=BN_bn2bin(bn,ret->data);
return(ret);
err:
if (ret != ai) M_ASN1_ENUMERATED_free(ret);
return(NULL);
}
开发者ID:RobinWuDev，项目名称:Qt，代码行数:35，代码来源:a_enum.c
示例3: store_array
static void
store_array(void)
{
struct number *inumber;
struct value *value;
struct stack *stack;
u_long idx;
int reg;
reg = readreg();
if (reg >= 0) {
inumber = pop_number();
if (inumber == NULL)
return;
value = pop();
if (value == NULL) {
free_number(inumber);
return;
}
idx = get_ulong(inumber);
if (BN_is_negative(inumber->number)) {
warnx("negative idx");
stack_free_value(value);
} else if (idx == ULONG_MAX || idx > MAX_ARRAY_INDEX) {
warnx("idx too big");
stack_free_value(value);
} else {
stack = &bmachine.reg[reg];
frame_assign(stack, idx, value);
}
free_number(inumber);
}
}
开发者ID:FreeBSDFoundation，项目名称:freebsd，代码行数:33，代码来源:bcode.c
示例4: encode_varint
/**
* Encode the varint using two's complement
*
* @return Vector of bytes in two's complement
*/
std::vector<unsigned char> encode_varint() const {
// Handle NULL and zero varint
if (!big_number_ || BN_num_bytes(big_number_.get()) == 0) {
std::vector<unsigned char> bytes(1);
bytes[0] = 0x00;
return bytes;
}
size_t number_of_bytes = BN_num_bytes(big_number_.get()) + 1;
std::vector<unsigned char> bytes(number_of_bytes);
if (BN_bn2bin(big_number_.get(), &bytes[1]) > 0) {
// Set the sign and convert to two's complement (if necessary)
if (BN_is_negative(big_number_.get())) {
bool is_carry = true;
for (ssize_t i = number_of_bytes - 1; i >= 0; --i) {
bytes[i] ^= 0xFF;
if (is_carry) {
is_carry = ((++bytes[i]) == 0);
}
}
bytes[0] |= 0x80;
} else {
bytes[0] = 0x00;
}
}
return bytes;
}
开发者ID:hpcc-systems，项目名称:cpp-driver，代码行数:33，代码来源:bignumber.hpp
示例5: BN_bn2cbb
int BN_bn2cbb(CBB *cbb, const BIGNUM *bn) {
/* Negative numbers are unsupported. */
if (BN_is_negative(bn)) {
OPENSSL_PUT_ERROR(BN, BN_R_NEGATIVE_NUMBER);
return 0;
}
CBB child;
if (!CBB_add_asn1(cbb, &child, CBS_ASN1_INTEGER)) {
OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
return 0;
}
/* The number must be padded with a leading zero if the high bit would
* otherwise be set (or |bn| is zero). */
if (BN_num_bits(bn) % 8 == 0 &&
!CBB_add_u8(&child, 0x00)) {
OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
return 0;
}
uint8_t *out;
if (!CBB_add_space(&child, &out, BN_num_bytes(bn))) {
OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
return 0;
}
BN_bn2bin(bn, out);
if (!CBB_flush(cbb)) {
OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
return 0;
}
return 1;
}
开发者ID:reaperhulk，项目名称:ring，代码行数:33，代码来源:bn_asn1.c
示例6: load_array
static void
load_array(void)
{
struct number *inumber, *n;
struct stack *stack;
struct value *v;
struct value copy;
u_long idx;
int reg;
reg = readreg();
if (reg >= 0) {
inumber = pop_number();
if (inumber == NULL)
return;
idx = get_ulong(inumber);
if (BN_is_negative(inumber->number))
warnx("negative idx");
else if (idx == ULONG_MAX || idx > MAX_ARRAY_INDEX)
warnx("idx too big");
else {
stack = &bmachine.reg[reg];
v = frame_retrieve(stack, idx);
if (v == NULL || v->type == BCODE_NONE) {
n = new_number();
bn_check(BN_zero(n->number));
push_number(n);
}
else
push(stack_dup_value(v, ©));
}
free_number(inumber);
}
}
开发者ID:FreeBSDFoundation，项目名称:freebsd，代码行数:34，代码来源:bcode.c
示例7: bn8_from_bn
void bn8_from_bn(bn8 r, const BIGNUM *a)
{
int n = BN_num_bytes(a);
memset(r, 0, BN8_SIZE);
BN_bn2bin(a, r+1+(BN8_SIZE-1)-n);
if(BN_is_negative(a))
bn8_negative(r);
}
开发者ID:12019，项目名称:bitcoin-smartcard，代码行数:8，代码来源:bn8_misc.c
示例8: FC_ASSERT
int64_t bigint::to_int64() const
{
FC_ASSERT(BN_num_bits(n) <= 63);
size_t size = BN_num_bytes(n);
uint64_t abs_value = 0;
BN_bn2bin(n, (unsigned char*)&abs_value + (sizeof(uint64_t) - size));
return BN_is_negative(n) ? -(int64_t)bswap_64(abs_value) : bswap_64(abs_value);
}
开发者ID:FollowMyVote，项目名称:fc，代码行数:8，代码来源:bigint.cpp
示例9: rsa_greater_than_pow2
int rsa_greater_than_pow2(const BIGNUM *b, int n) {
if (BN_is_negative(b) || n == INT_MAX) {
return 0;
}
int b_bits = BN_num_bits(b);
return b_bits > n + 1 || (b_bits == n + 1 && !BN_is_pow2(b));
}
开发者ID:freeors，项目名称:Rose，代码行数:8，代码来源:rsa_impl.c
示例10: Java_java_math_NativeBN_sign
extern "C" int Java_java_math_NativeBN_sign(JNIEnv* env, jclass, jlong a) {
if (!oneValidHandle(env, a)) return -2;
if (BN_is_zero(toBigNum(a))) {
return 0;
} else if (BN_is_negative(toBigNum(a))) {
return -1;
}
return 1;
}
开发者ID:AlexeyBychkov，项目名称:robovm，代码行数:9，代码来源:java_math_NativeBN.cpp
示例11: _hc_BN_to_integer
int
_hc_BN_to_integer(BIGNUM *bn, heim_integer *integer)
{
integer->length = BN_num_bytes(bn);
integer->data = malloc(integer->length);
if (integer->data == NULL)
return ENOMEM;
BN_bn2bin(bn, integer->data);
integer->negative = BN_is_negative(bn);
return 0;
}
开发者ID:alfintatorkace，项目名称:osx-10.9-opensource，代码行数:11，代码来源:common.c
示例12: BN_to_integer
static krb5_error_code
BN_to_integer(krb5_context context, BIGNUM *bn, heim_integer *integer)
{
integer->length = BN_num_bytes(bn);
integer->data = malloc(integer->length);
if (integer->data == NULL) {
krb5_clear_error_message(context);
return ENOMEM;
}
BN_bn2bin(bn, integer->data);
integer->negative = BN_is_negative(bn);
return 0;
}
开发者ID:heimdal，项目名称:heimdal，代码行数:13，代码来源:pkinit.c
示例13: bn2heim_int
static int
bn2heim_int(BIGNUM *bn, heim_integer *integer)
{
integer->length = BN_num_bytes(bn);
integer->data = malloc(integer->length);
if (integer->data == NULL) {
integer->length = 0;
return ENOMEM;
}
BN_bn2bin(bn, integer->data);
integer->negative = BN_is_negative(bn);
return 0;
}
开发者ID:AllardJ，项目名称:Tomato，代码行数:13，代码来源:rsa.c
示例14: bignum_to_bytea
/**
* Convert BIGNUM to bytea. (Copied from pg-bignum)
*/
bytea * bignum_to_bytea(BIGNUM *bn) {
int len;
bytea *results;
// create bytea results.
len = BN_num_bytes(bn);
results = (bytea *) palloc(len + 1 + VARHDRSZ);
*VARDATA(results) = BN_is_negative(bn) ? 0x01 : 0x00;
BN_bn2bin(bn, (unsigned char *) VARDATA(results) + 1);
SET_VARSIZE(results, len + 1 + VARHDRSZ);
return results;
}
开发者ID:beargiles，项目名称:pg-cert，代码行数:16，代码来源:pgx_cert_utils.c
示例15: ASN1_bn_print
int
ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
unsigned char *buf, int off)
{
int n, i;
const char *neg;
if (num == NULL)
return (1);
neg = (BN_is_negative(num)) ? "-" : "";
if (!BIO_indent(bp, off, 128))
return 0;
if (BN_is_zero(num)) {
if (BIO_printf(bp, "%s 0\n", number) <= 0)
return 0;
return 1;
}
if (BN_num_bytes(num) <= BN_BYTES) {
if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
(unsigned long)num->d[0], neg,
(unsigned long)num->d[0]) <= 0)
return (0);
} else {
buf[0] = 0;
if (BIO_printf(bp, "%s%s", number,
(neg[0] == '-') ? " (Negative)" : "") <= 0)
return (0);
n = BN_bn2bin(num, &buf[1]);
if (buf[1] & 0x80)
n++;
else
buf++;
for (i = 0; i < n; i++) {
if ((i % 15) == 0) {
if (BIO_puts(bp, "\n") <= 0 ||
!BIO_indent(bp, off + 4, 128))
return 0;
}
if (BIO_printf(bp, "%02x%s", buf[i],
((i + 1) == n) ? "" : ":") <= 0)
return (0);
}
if (BIO_write(bp, "\n", 1) <= 0)
return (0);
}
return (1);
}
开发者ID:2trill2spill，项目名称:nextgen，代码行数:50，代码来源:t_pkey.c
示例16: ASN1_bn_print
int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
unsigned char *ign, int indent)
{
int n, rv = 0;
const char *neg;
unsigned char *buf = NULL, *tmp = NULL;
int buflen;
if (num == NULL)
return 1;
neg = BN_is_negative(num) ? "-" : "";
if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT))
return 0;
if (BN_is_zero(num)) {
if (BIO_printf(bp, "%s 0\n", number) <= 0)
return 0;
return 1;
}
if (BN_num_bytes(num) <= BN_BYTES) {
if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
(unsigned long)bn_get_words(num)[0], neg,
(unsigned long)bn_get_words(num)[0]) <= 0)
return 0;
return 1;
}
buflen = BN_num_bytes(num) + 1;
buf = tmp = OPENSSL_malloc(buflen);
if (buf == NULL)
goto err;
buf[0] = 0;
if (BIO_printf(bp, "%s%s\n", number,
(neg[0] == '-') ? " (Negative)" : "") <= 0)
goto err;
n = BN_bn2bin(num, buf + 1);
if (buf[1] & 0x80)
n++;
else
tmp++;
if (ASN1_buf_print(bp, tmp, n, indent + 4) == 0)
goto err;
rv = 1;
err:
OPENSSL_clear_free(buf, buflen);
return rv;
}
开发者ID:mtrojnar，项目名称:openssl，代码行数:49，代码来源:t_pkey.c
示例17: is_legal
/* g^x is a legal value */
static int is_legal(const BIGNUM *gx, const JPAKE_CTX *ctx)
{
BIGNUM *t;
int res;
if(BN_is_negative(gx) || BN_is_zero(gx) || BN_cmp(gx, ctx->p.p) >= 0)
return 0;
t = BN_new();
BN_mod_exp(t, gx, ctx->p.q, ctx->p.p, ctx->ctx);
res = BN_is_one(t);
BN_free(t);
return res;
}
开发者ID:qzhouayi，项目名称:New_graduation_thesis，代码行数:16，代码来源:zhjpake.c
示例18: set_Jprojective_coordinate_GFp
static int set_Jprojective_coordinate_GFp(const EC_GROUP *group, BIGNUM *out,
const BIGNUM *in, BN_CTX *ctx) {
if (in == NULL) {
return 1;
}
if (BN_is_negative(in) ||
BN_cmp(in, &group->field) >= 0) {
OPENSSL_PUT_ERROR(EC, EC_R_COORDINATES_OUT_OF_RANGE);
return 0;
}
if (group->meth->field_encode) {
return group->meth->field_encode(group, out, in, ctx);
}
return BN_copy(out, in) != NULL;
}
开发者ID:AadityaDev，项目名称:AadityaDev.github.io，代码行数:15，代码来源:simple.c
示例19: check_mod_inverse
static int check_mod_inverse(int *out_ok, const BIGNUM *a, const BIGNUM *ainv,
const BIGNUM *m, int check_reduced, BN_CTX *ctx) {
BN_CTX_start(ctx);
BIGNUM *tmp = BN_CTX_get(ctx);
int ret = tmp != NULL &&
bn_mul_consttime(tmp, a, ainv, ctx) &&
bn_div_consttime(NULL, tmp, tmp, m, ctx);
if (ret) {
*out_ok = BN_is_one(tmp);
if (check_reduced && (BN_is_negative(ainv) || BN_cmp(ainv, m) >= 0)) {
*out_ok = 0;
}
}
BN_CTX_end(ctx);
return ret;
}
开发者ID:0x64616E69656C，项目名称:boringssl，代码行数:16，代码来源:rsa.c
示例20: bsqrt
static void
bsqrt(void)
{
struct number *n;
struct number *r;
BIGNUM *x, *y;
u_int scale, onecount;
BN_CTX *ctx;
onecount = 0;
n = pop_number();
if (n == NULL) {
return;
}
if (BN_is_zero(n->number)) {
r = new_number();
push_number(r);
} else if (BN_is_negative(n->number))
warnx("square root of negative number");
else {
scale = max(bmachine.scale, n->scale);
normalize(n, 2*scale);
x = BN_dup(n->number);
bn_checkp(x);
bn_check(BN_rshift(x, x, BN_num_bits(x)/2));
y = BN_new();
bn_checkp(y);
ctx = BN_CTX_new();
bn_checkp(ctx);
for (;;) {
bn_checkp(BN_copy(y, x));
bn_check(BN_div(x, NULL, n->number, x, ctx));
bn_check(BN_add(x, x, y));
bn_check(BN_rshift1(x, x));
if (bsqrt_stop(x, y, &onecount))
break;
}
r = bmalloc(sizeof(*r));
r->scale = scale;
r->number = y;
BN_free(x);
BN_CTX_free(ctx);
push_number(r);
}
free_number(n);
}
开发者ID:darksoul42，项目名称:bitrig，代码行数:47，代码来源:bcode.c
注：本文中的BN_is_negative函数示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。 |
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