Class: OpenSSL::PKey::EC::Point

Inherits:
Object
  • Object
show all
Defined in:
lib/openssl/pkey.rb,
ext/openssl/ossl_pkey_ec.c

Defined Under Namespace

Classes: Error

Instance Method Summary collapse

Constructor Details

#OpenSSL::PKey::EC::Point.new(point) ⇒ Object #OpenSSL::PKey::EC::Point.new(group[, encoded_point]) ⇒ Object

Creates a new instance of OpenSSL::PKey::EC::Point. If the only argument is an instance of EC::Point, a copy is returned. Otherwise, creates a point that belongs to group.

encoded_point is the octet string representation of the point. This must be either a String or an OpenSSL::BN.



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# File 'ext/openssl/ossl_pkey_ec.c', line 1216

static VALUE ossl_ec_point_initialize(int argc, VALUE *argv, VALUE self)
{
    EC_POINT *point;
    VALUE group_v, arg2;
    const EC_GROUP *group;

    TypedData_Get_Struct(self, EC_POINT, &ossl_ec_point_type, point);
    if (point)
        rb_raise(eEC_POINT, "EC_POINT already initialized");

    rb_scan_args(argc, argv, "11", &group_v, &arg2);
    if (rb_obj_is_kind_of(group_v, cEC_POINT)) {
        if (argc != 1)
            rb_raise(rb_eArgError, "invalid second argument");
        return ossl_ec_point_initialize_copy(self, group_v);
    }

    GetECGroup(group_v, group);
    if (argc == 1) {
        point = EC_POINT_new(group);
        if (!point)
            ossl_raise(eEC_POINT, "EC_POINT_new");
    }
    else {
        if (rb_obj_is_kind_of(arg2, cBN)) {
            point = EC_POINT_bn2point(group, GetBNPtr(arg2), NULL, ossl_bn_ctx);
            if (!point)
                ossl_raise(eEC_POINT, "EC_POINT_bn2point");
        }
        else {
            StringValue(arg2);
            point = EC_POINT_new(group);
            if (!point)
                ossl_raise(eEC_POINT, "EC_POINT_new");
            if (!EC_POINT_oct2point(group, point,
                                    (unsigned char *)RSTRING_PTR(arg2),
                                    RSTRING_LEN(arg2), ossl_bn_ctx)) {
                EC_POINT_free(point);
                ossl_raise(eEC_POINT, "EC_POINT_oct2point");
            }
        }
    }

    RTYPEDDATA_DATA(self) = point;
    rb_ivar_set(self, id_i_group, group_v);

    return self;
}

Instance Method Details

#add(point) ⇒ Object

Performs elliptic curve point addition.



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# File 'ext/openssl/ossl_pkey_ec.c', line 1461

static VALUE ossl_ec_point_add(VALUE self, VALUE other)
{
    EC_POINT *point_self, *point_other, *point_result;
    const EC_GROUP *group;
    VALUE group_v = rb_attr_get(self, id_i_group);
    VALUE result;

    GetECPoint(self, point_self);
    GetECPoint(other, point_other);
    GetECGroup(group_v, group);

    result = rb_obj_alloc(cEC_POINT);
    ossl_ec_point_initialize(1, &group_v, result);
    GetECPoint(result, point_result);

    if (EC_POINT_add(group, point_result, point_self, point_other, ossl_bn_ctx) != 1) {
        ossl_raise(eEC_POINT, "EC_POINT_add");
    }

    return result;
}

#eql?(point2) ⇒ Boolean #==(point2) ⇒ Boolean Also known as: == 



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# File 'ext/openssl/ossl_pkey_ec.c', line 1295

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);
    GetECPoint(b, point2);
    GetECGroup(group_v1, group);

    switch (EC_POINT_cmp(group, point1, point2, ossl_bn_ctx)) {
      case 0: return Qtrue;
      case 1: return Qfalse;
      default: ossl_raise(eEC_POINT, "EC_POINT_cmp");
    }

    UNREACHABLE;
}

#infinity? ⇒ Boolean 



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# File 'ext/openssl/ossl_pkey_ec.c', line 1322

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(eEC_POINT, "EC_POINT_is_at_infinity");
    }

    UNREACHABLE;
}

#initialize_copy(other) ⇒ Object

:nodoc:



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# File 'ext/openssl/ossl_pkey_ec.c', line 1266

static VALUE
ossl_ec_point_initialize_copy(VALUE self, VALUE other)
{
    EC_POINT *point, *point_new;
    EC_GROUP *group;
    VALUE group_v;

    TypedData_Get_Struct(self, EC_POINT, &ossl_ec_point_type, point_new);
    if (point_new)
        ossl_raise(eEC_POINT, "EC::Point already initialized");
    GetECPoint(other, point);

    group_v = rb_obj_dup(rb_attr_get(other, id_i_group));
    GetECGroup(group_v, group);

    point_new = EC_POINT_dup(point, group);
    if (!point_new)
        ossl_raise(eEC_POINT, "EC_POINT_dup");
    RTYPEDDATA_DATA(self) = point_new;
    rb_ivar_set(self, id_i_group, group_v);

    return self;
}

#invert! ⇒ self 



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# File 'ext/openssl/ossl_pkey_ec.c', line 1387

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(eEC_POINT, "EC_POINT_invert");

    return self;
}

#make_affine! ⇒ self

This method is deprecated and should not be used. This is a no-op.



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# File 'ext/openssl/ossl_pkey_ec.c', line 1366

static VALUE ossl_ec_point_make_affine(VALUE self)
{
    EC_POINT *point;
    const EC_GROUP *group;

    GetECPoint(self, point);
    GetECPointGroup(self, group);

    rb_warn("OpenSSL::PKey::EC::Point#make_affine! is deprecated");
#if !defined(OSSL_HAVE_IMMUTABLE_PKEY) && !defined(OPENSSL_IS_AWSLC)
    if (EC_POINT_make_affine(group, point, ossl_bn_ctx) != 1)
        ossl_raise(eEC_POINT, "EC_POINT_make_affine");
#endif

    return self;
}

#mul(bn1[, bn2]) ⇒ Object

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.

Before version 4.0.0, and when compiled with OpenSSL 1.1.1 or older, this method allowed another form:

point.mul(bns, points [, bn2]) => point



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# File 'ext/openssl/ossl_pkey_ec.c', line 1497

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);
    GetECGroup(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) || argc > 2)
        rb_raise(rb_eNotImpError, "OpenSSL::PKey::EC::Point#mul with arrays " \
                 "is no longer supported");

    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);

    return result;
}

#on_curve? ⇒ Boolean 



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# File 'ext/openssl/ossl_pkey_ec.c', line 1343

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(eEC_POINT, "EC_POINT_is_on_curve");
    }

    UNREACHABLE;
}

#set_to_infinity! ⇒ self 



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# File 'ext/openssl/ossl_pkey_ec.c', line 1405

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(eEC_POINT, "EC_POINT_set_to_infinity");

    return self;
}

#to_bn(conversion_form = group.point_conversion_form) ⇒ Object

:call-seq:

point.to_bn([conversion_form]) -> OpenSSL::BN

Returns the octet string representation of the EC point as an instance of OpenSSL::BN.

If conversion_form is not given, the point_conversion_form attribute set to the group is used.

See #to_octet_string for more information.



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# File 'lib/openssl/pkey.rb', line 330

def to_bn(conversion_form = group.point_conversion_form)
  OpenSSL::BN.new(to_octet_string(conversion_form), 2)
end

#to_octet_string(conversion_form) ⇒ String

Returns the octet string representation of the elliptic curve point.

conversion_form specifies how the point is converted. Possible values are:

  • :compressed

  • :uncompressed

  • :hybrid



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# File 'ext/openssl/ossl_pkey_ec.c', line 1431

static VALUE
ossl_ec_point_to_octet_string(VALUE self, VALUE conversion_form)
{
    EC_POINT *point;
    const EC_GROUP *group;
    point_conversion_form_t form;
    VALUE str;
    size_t len;

    GetECPoint(self, point);
    GetECPointGroup(self, group);
    form = parse_point_conversion_form_symbol(conversion_form);

    len = EC_POINT_point2oct(group, point, form, NULL, 0, ossl_bn_ctx);
    if (!len)
        ossl_raise(eEC_POINT, "EC_POINT_point2oct");
    str = rb_str_new(NULL, (long)len);
    if (!EC_POINT_point2oct(group, point, form,
                            (unsigned char *)RSTRING_PTR(str), len,
                            ossl_bn_ctx))
        ossl_raise(eEC_POINT, "EC_POINT_point2oct");
    return str;
}