OpenSSL::BN

父类：ObjectIncluded 模块：可比较

公共类方法

generate_prime（bits，[，safe [，add，rem]]）→bn 显示源代码

生成一个随机的素数位长度bits。如果safe属实，则生成安全素数。如果add指定，则生成满足条件的素数p % add = rem。

参数

bits - 整数

safe - 布尔值

add - BN

rem - BN

static VALUE
ossl_bn_s_generate_prime(int argc, VALUE *argv, VALUE klass)
{
    BIGNUM *add = NULL, *rem = NULL, *result;
    int safe = 1, num;
    VALUE vnum, vsafe, vadd, vrem, obj;

    rb_scan_args(argc, argv, "13", &vnum, &vsafe, &vadd, &vrem);

    num = NUM2INT(vnum);

    if (vsafe == Qfalse) {
        safe = 0;
    }
    if (!NIL_P(vadd)) {
        add = GetBNPtr(vadd);
        rem = NIL_P(vrem) ? NULL : GetBNPtr(vrem);
    }
    obj = NewBN(klass);
    if (!(result = BN_new())) {
        ossl_raise(eBNError, NULL);
    }
    if (!BN_generate_prime_ex(result, num, safe, add, rem, NULL)) {
        BN_free(result);
        ossl_raise(eBNError, NULL);
    }
    SetBN(obj, result);

    return obj;
}

OpenSSL :: BN.new→aBN 显示源文件

OpenSSL::BN.new(bn) → aBN

OpenSSL::BN.new(integer) → aBN

OpenSSL::BN.new(string) → aBN

OpenSSL::BN.new(string, 0 | 2 | 10 | 16) → aBN

构建一个新的 OpenSSL BigNum 对象。

static VALUE
ossl_bn_initialize(int argc, VALUE *argv, VALUE self)
{
    BIGNUM *bn;
    VALUE str, bs;
    int base = 10;

    if (rb_scan_args(argc, argv, "11", &str, &bs) == 2) {
        base = NUM2INT(bs);
    }

    if (RB_INTEGER_TYPE_P(str)) {
        GetBN(self, bn);
        integer_to_bnptr(str, bn);

        return self;
    }

    if (RTEST(rb_obj_is_kind_of(str, cBN))) {
        BIGNUM *other;

        GetBN(self, bn);
        GetBN(str, other); /* Safe - we checked kind_of? above */
        if (!BN_copy(bn, other)) {
            ossl_raise(eBNError, NULL);
        }
        return self;
    }

    GetBN(self, bn);
    switch (base) {
    case 0:
        if (!BN_mpi2bn((unsigned char *)StringValuePtr(str), RSTRING_LENINT(str), bn)) {
            ossl_raise(eBNError, NULL);
        }
        break;
    case 2:
        if (!BN_bin2bn((unsigned char *)StringValuePtr(str), RSTRING_LENINT(str), bn)) {
            ossl_raise(eBNError, NULL);
        }
        break;
    case 10:
        if (!BN_dec2bn(&bn, StringValueCStr(str))) {
            ossl_raise(eBNError, NULL);
        }
        break;
    case 16:
        if (!BN_hex2bn(&bn, StringValueCStr(str))) {
            ossl_raise(eBNError, NULL);
        }
        break;
    default:
        ossl_raise(rb_eArgError, "invalid radix %d", base);
    }
    return self;
}

公共实例方法

bn % bn2 → aBN

bn * bn2 → aBN

bn ** bn2 → aBN

bn + bn2 → aBN

bn - bn2 → aBN

bn1 / bn2→ result, remainder() （结果，余数（））

OpenSSL :: BN 实例的划分

static VALUE
ossl_bn_div(VALUE self, VALUE other)
{
    BIGNUM *bn1, *bn2 = GetBNPtr(other), *r1, *r2;
    VALUE klass, obj1, obj2;

    GetBN(self, bn1);

    klass = rb_obj_class(self);
    obj1 = NewBN(klass);
    obj2 = NewBN(klass);
    if (!(r1 = BN_new())) {
        ossl_raise(eBNError, NULL);
    }
    if (!(r2 = BN_new())) {
        BN_free(r1);
        ossl_raise(eBNError, NULL);
    }
    if (!BN_div(r1, r2, bn1, bn2, ossl_bn_ctx)) {
        BN_free(r1);
        BN_free(r2);
        ossl_raise(eBNError, NULL);
    }
    SetBN(obj1, r1);
    SetBN(obj2, r2);

    return rb_ary_new3(2, obj1, obj2);
}

bn << bits → aBN

<=>(p1)

Alias for: cmp

bn == obj→true 或 false 显示来源

仅当obj具有bn相同的值时返回true。与#eql？对比，这需要 obj 为 OpenSSL :: BN。

static VALUE
ossl_bn_eq(VALUE self, VALUE other)
{
    BIGNUM *bn1, *bn2;

    GetBN(self, bn1);
    other = try_convert_to_bn(other);
    if (NIL_P(other))
        return Qfalse;
    GetBN(other, bn2);

    if (!BN_cmp(bn1, bn2)) {
        return Qtrue;
    }
    return Qfalse;
}

另外别名为：===

===(p1)

别名为：==

bn >> bits → aBN

bit_set？（bit）→true | 假显示源

返回是否bit设置的布尔值。对于 openssl BIGNUMs 的按位操作。

static VALUE
ossl_bn_is_bit_set(VALUE self, VALUE bit)
{
    int b;
    BIGNUM *bn;

    b = NUM2INT(bit);
    GetBN(self, bn);
    if (BN_is_bit_set(bn, b)) {
        return Qtrue;
    }
    return Qfalse;
}

clear_bit!(bit) → self

cmp（bn2）→整数

另外别名为：<=>

coerce(p1)显示源

static VALUE
ossl_bn_coerce(VALUE self, VALUE other)
{
    switch(TYPE(other)) {
    case T_STRING:
        self = ossl_bn_to_s(0, NULL, self);
        break;
    case T_FIXNUM:
    case T_BIGNUM:
        self = ossl_bn_to_i(self);
        break;
    default:
        if (!RTEST(rb_obj_is_kind_of(other, cBN))) {
            ossl_raise(rb_eTypeError, "Don't know how to coerce");
        }
    }
    return rb_assoc_new(other, self);
}

copy(p1) 显示源文件

static VALUE
ossl_bn_copy(VALUE self, VALUE other)
{
    BIGNUM *bn1, *bn2;

    rb_check_frozen(self);

    if (self == other) return self;

    GetBN(self, bn1);
    bn2 = GetBNPtr(other);

    if (!BN_copy(bn1, bn2)) {
        ossl_raise(eBNError, NULL);
    }
    return self;
}

eql？（obj）→true 或 false 显示源文件

仅当 obj 是一个OpenSSL::BN与 big 相同的值时才返回true。将其与OpenSSL :: BN＃==进行对比，后者执行类型转换。

static VALUE
ossl_bn_eql(VALUE self, VALUE other)
{
    BIGNUM *bn1, *bn2;

    if (!rb_obj_is_kind_of(other, cBN))
        return Qfalse;
    GetBN(self, bn1);
    GetBN(other, bn2);

    return BN_cmp(bn1, bn2) ? Qfalse : Qtrue;
}

gcd(bn2) → aBN

hash（散列）→整数显示源文件

返回此对象的哈希码。

另见对象＃散列。

static VALUE
ossl_bn_hash(VALUE self)
{
    BIGNUM *bn;
    VALUE hash;
    unsigned char *buf;
    int len;

    GetBN(self, bn);
    len = BN_num_bytes(bn);
    buf = xmalloc(len);
    if (BN_bn2bin(bn, buf) != len) {
        xfree(buf);
        ossl_raise(eBNError, NULL);
    }

    hash = INT2FIX(rb_memhash(buf, len));
    xfree(buf);

    return hash;
}

lshift!(bits) → self

mod_add(bn1, bn2) → aBN

mod_exp(bn1, bn2) → aBN

mod_inverse(bn2) → aBN

mod_mul(bn1, bn2) → aBN

mod_sqr(bn2) → aBN

mod_sub(bn1, bn2) → aBN

num_bits → integer

num_bytes → integer

odd? → true | false

one? → true | false

pretty_print（q）显示源文件

# File ext/openssl/lib/openssl/bn.rb, line 19
def pretty_print(q)
  q.object_group(self) {
    q.text ' '
    q.text to_i.to_s
  }
end

prime?（主要？）→true | false 显示源

prime?(checks) → true | false

用checks迭代执行 Miller-Rabin 概率素性测试。如果nchecks未指定，则使用多次迭代，对于随机输入产生至多2 ^ -80的误报率。

参数

checks - 整数值VALUE ossl_bn_is_prime（int argc，VALUE * argv，VALUE self）{BIGNUM * bn; VALUE vchecks; int checks = BN_prime_checks; 如果（rb_scan_args（argc，argv，“01”，＆vchecks）== 1）{checks = NUM??2INT（vchecks）; } GetBN（self，bn）; 开关（BN_is_prime_ex（bn，checks，ossl_bn_ctx，NULL））{case 1：return Qtrue; 情况0：返回Qfalse; 默认：ossl_raise（eBNError，NULL）; } / *不可达* / return Qnil; } prime_fasttest？→true | false显示源prime_fasttest？（检查）→true | false prime_fasttest？（checks，trial_div）→true | false执行Miller-Rabin素性测试。这和素数一样吗？除了这第一次试图与一些小素数审判师。参数

checks - integer

trial_div - booleanstatic VALUE ossl_bn_is_prime_fasttest(int argc, VALUE *argv, VALUE self) { BIGNUM *bn; VALUE vchecks, vtrivdiv; int checks = BN_prime_checks, do_trial_division = 1; rb_scan_args(argc, argv, "02", &vchecks, &vtrivdiv); if (!NIL_P(vchecks)) { checks = NUM2INT(vchecks); } GetBN(self, bn); /* handle true/false */ if (vtrivdiv == Qfalse) { do_trial_division = 0; } switch (BN_is_prime_fasttest_ex(bn, checks, ossl_bn_ctx, do_trial_division, NULL)) { case 1: return Qtrue; case 0: return Qfalse; default: ossl_raise(eBNError, NULL); } /* not reachable */ return Qnil; } rshift!(bits) → self set_bit!(bit) → self sqr → aBN to_bn() Show source static VALUE ossl_bn_to_bn(VALUE self) { return self; } to_i → integer Show source static VALUE ossl_bn_to_i(VALUE self) { BIGNUM *bn; char *txt; VALUE num; GetBN(self, bn); if (!(txt = BN_bn2hex(bn))) { ossl_raise(eBNError, NULL); } num = rb_cstr_to_inum(txt, 16, Qtrue); OPENSSL_free(txt); return num; } Also aliased as: to_int to_int() Alias for: to_i to_s → string Show source to_s(base) → string Parameters

base - 整数有效值：

-  0 - MPI

-  2 - binary

-  10 - the default

-  16 - hex

static VALUE
ossl_bn_to_s(int argc, VALUE *argv, VALUE self)
{
    BIGNUM *bn;
    VALUE str, bs;
    int base = 10, len;
    char *buf;

    if (rb_scan_args(argc, argv, "01", &bs) == 1) {
        base = NUM2INT(bs);
    }
    GetBN(self, bn);
    switch (base) {
    case 0:
        len = BN_bn2mpi(bn, NULL);
        str = rb_str_new(0, len);
        if (BN_bn2mpi(bn, (unsigned char *)RSTRING_PTR(str)) != len)
            ossl_raise(eBNError, NULL);
        break;
    case 2:
        len = BN_num_bytes(bn);
        str = rb_str_new(0, len);
        if (BN_bn2bin(bn, (unsigned char *)RSTRING_PTR(str)) != len)
            ossl_raise(eBNError, NULL);
        break;
    case 10:
        if (!(buf = BN_bn2dec(bn))) ossl_raise(eBNError, NULL);
        str = ossl_buf2str(buf, rb_long2int(strlen(buf)));
        break;
    case 16:
        if (!(buf = BN_bn2hex(bn))) ossl_raise(eBNError, NULL);
        str = ossl_buf2str(buf, rb_long2int(strlen(buf)));
        break;
    default:
        ossl_raise(rb_eArgError, "invalid radix %d", base);
    }

    return str;
}

ucmp(bn2) → integer

zero? → true | false

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最后更新于：2017-12-18