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Class Methods
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_initialize(int argc, VALUE *argv, VALUE self)
{
EC_POINT *point;
VALUE arg1, arg2;
VALUE group_v = Qnil;
const EC_GROUP *group = NULL;
TypedData_Get_Struct(self, EC_POINT, &ossl_ec_point_type, point);
if (point)
ossl_raise(eEC_POINT, "EC_POINT already initialized");
switch (rb_scan_args(argc, argv, "11", &arg1, &arg2)) {
case 1:
if (rb_obj_is_kind_of(arg1, cEC_POINT)) {
const EC_POINT *arg_point;
group_v = rb_attr_get(arg1, id_i_group);
SafeGetECGroup(group_v, group);
SafeGetECPoint(arg1, arg_point);
point = EC_POINT_dup(arg_point, group);
} else if (rb_obj_is_kind_of(arg1, cEC_GROUP)) {
group_v = arg1;
SafeGetECGroup(group_v, group);
point = EC_POINT_new(group);
} else {
ossl_raise(eEC_POINT, "wrong argument type: must be OpenSSL::PKey::EC::Point or OpenSSL::Pkey::EC::Group");
}
break;
case 2:
if (!rb_obj_is_kind_of(arg1, cEC_GROUP))
ossl_raise(rb_eArgError, "1st argument must be OpenSSL::PKey::EC::Group");
group_v = arg1;
SafeGetECGroup(group_v, group);
if (rb_obj_is_kind_of(arg2, cBN)) {
const BIGNUM *bn = GetBNPtr(arg2);
point = EC_POINT_bn2point(group, bn, NULL, ossl_bn_ctx);
} else {
BIO *in = ossl_obj2bio(&arg1);
/* BUG: finish me */
BIO_free(in);
if (point == NULL) {
ossl_raise(eEC_POINT, "unknown type for 2nd arg");
}
}
break;
default:
ossl_raise(rb_eArgError, "wrong number of arguments");
}
if (point == NULL)
ossl_raise(eEC_POINT, NULL);
if (NIL_P(group_v))
ossl_raise(rb_eRuntimeError, "missing group (internal error)");
RTYPEDDATA_DATA(self) = point;
rb_ivar_set(self, id_i_group, group_v);
return self;
}
See the OpenSSL documentation for EC_POINT_*
Instance Methods
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_eql(VALUE a, VALUE b)
{
EC_POINT *point1, *point2;
VALUE group_v1 = rb_attr_get(a, id_i_group);
VALUE group_v2 = rb_attr_get(b, id_i_group);
const EC_GROUP *group;
if (ossl_ec_group_eql(group_v1, group_v2) == Qfalse)
return Qfalse;
GetECPoint(a, point1);
SafeGetECPoint(b, point2);
SafeGetECGroup(group_v1, group);
if (EC_POINT_cmp(group, point1, point2, ossl_bn_ctx) == 1)
return Qfalse;
return Qtrue;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_is_at_infinity(VALUE self)
{
EC_POINT *point;
const EC_GROUP *group;
GetECPoint(self, point);
GetECPointGroup(self, group);
switch (EC_POINT_is_at_infinity(group, point)) {
case 1: return Qtrue;
case 0: return Qfalse;
default: ossl_raise(cEC_POINT, "EC_POINT_is_at_infinity");
}
UNREACHABLE;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_invert(VALUE self)
{
EC_POINT *point;
const EC_GROUP *group;
GetECPoint(self, point);
GetECPointGroup(self, group);
if (EC_POINT_invert(group, point, ossl_bn_ctx) != 1)
ossl_raise(cEC_POINT, "EC_POINT_invert");
return self;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_make_affine(VALUE self)
{
EC_POINT *point;
const EC_GROUP *group;
GetECPoint(self, point);
GetECPointGroup(self, group);
if (EC_POINT_make_affine(group, point, ossl_bn_ctx) != 1)
ossl_raise(cEC_POINT, "EC_POINT_make_affine");
return self;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_mul(int argc, VALUE *argv, VALUE self)
{
EC_POINT *point_self, *point_result;
const EC_GROUP *group;
VALUE group_v = rb_attr_get(self, id_i_group);
VALUE arg1, arg2, arg3, result;
const BIGNUM *bn_g = NULL;
GetECPoint(self, point_self);
SafeGetECGroup(group_v, group);
result = rb_obj_alloc(cEC_POINT);
ossl_ec_point_initialize(1, &group_v, result);
GetECPoint(result, point_result);
rb_scan_args(argc, argv, "12", &arg1, &arg2, &arg3);
if (!RB_TYPE_P(arg1, T_ARRAY)) {
BIGNUM *bn = GetBNPtr(arg1);
if (!NIL_P(arg2))
bn_g = GetBNPtr(arg2);
if (EC_POINT_mul(group, point_result, bn_g, point_self, bn, ossl_bn_ctx) != 1)
ossl_raise(eEC_POINT, NULL);
} else {
/*
* bignums | arg1[0] | arg1[1] | arg1[2] | ...
* points | self | arg2[0] | arg2[1] | ...
*/
long i, num;
VALUE bns_tmp, tmp_p, tmp_b;
const EC_POINT **points;
const BIGNUM **bignums;
Check_Type(arg1, T_ARRAY);
Check_Type(arg2, T_ARRAY);
if (RARRAY_LEN(arg1) != RARRAY_LEN(arg2) + 1) /* arg2 must be 1 larger */
ossl_raise(rb_eArgError, "bns must be 1 longer than points; see the documentation");
num = RARRAY_LEN(arg1);
bns_tmp = rb_ary_tmp_new(num);
bignums = ALLOCV_N(const BIGNUM *, tmp_b, num);
for (i = 0; i < num; i++) {
VALUE item = RARRAY_AREF(arg1, i);
bignums[i] = GetBNPtr(item);
rb_ary_push(bns_tmp, item);
}
points = ALLOCV_N(const EC_POINT *, tmp_p, num);
points[0] = point_self; /* self */
for (i = 0; i < num - 1; i++)
SafeGetECPoint(RARRAY_AREF(arg2, i), points[i + 1]);
if (!NIL_P(arg3))
bn_g = GetBNPtr(arg3);
if (EC_POINTs_mul(group, point_result, bn_g, num, points, bignums, ossl_bn_ctx) != 1) {
ALLOCV_END(tmp_b);
ALLOCV_END(tmp_p);
ossl_raise(eEC_POINT, NULL);
}
ALLOCV_END(tmp_b);
ALLOCV_END(tmp_p);
}
return result;
}
Performs elliptic curve point multiplication.
The first form calculates bn1 * point + bn2 * G, where G is the generator of the group of point. bn2 may be omitted, and in that case, the result is just bn1 * point.
The second form calculates bns[0] * point + bns[1] * points[0] + ... + bns[-1] * points[-1] + bn2 * G. bn2 may be omitted. bns must be an array of OpenSSL::BN. points must be an array of OpenSSL::PKey::EC::Point. Please note that points[0] is not multiplied by bns[0], but bns[1].
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_is_on_curve(VALUE self)
{
EC_POINT *point;
const EC_GROUP *group;
GetECPoint(self, point);
GetECPointGroup(self, group);
switch (EC_POINT_is_on_curve(group, point, ossl_bn_ctx)) {
case 1: return Qtrue;
case 0: return Qfalse;
default: ossl_raise(cEC_POINT, "EC_POINT_is_on_curve");
}
UNREACHABLE;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE ossl_ec_point_set_to_infinity(VALUE self)
{
EC_POINT *point;
const EC_GROUP *group;
GetECPoint(self, point);
GetECPointGroup(self, group);
if (EC_POINT_set_to_infinity(group, point) != 1)
ossl_raise(cEC_POINT, "EC_POINT_set_to_infinity");
return self;
}
No documentation available
ext/openssl/ossl_pkey_ec.c
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static VALUE
ossl_ec_point_to_bn(int argc, VALUE *argv, VALUE self)
{
EC_POINT *point;
VALUE form_obj, bn_obj;
const EC_GROUP *group;
point_conversion_form_t form;
BIGNUM *bn;
GetECPoint(self, point);
GetECPointGroup(self, group);
rb_scan_args(argc, argv, "01", &form_obj);
if (NIL_P(form_obj))
form = EC_GROUP_get_point_conversion_form(group);
else
form = parse_point_conversion_form_symbol(form_obj);
bn_obj = rb_obj_alloc(cBN);
bn = GetBNPtr(bn_obj);
if (EC_POINT_point2bn(group, point, form, bn, ossl_bn_ctx) == NULL)
ossl_raise(eEC_POINT, "EC_POINT_point2bn");
return bn_obj;
}
Convert the EC point into an octet string and store in an OpenSSL::BN. If conversion_form is given, the point data is converted using the specified form. If not given, the default form set in the EC::Group object is used.
See also EC::Point#point_conversion_form=.