class OpenSSL::BN
Public Class Methods
generate_prime(bits, [, safe [, add [, rem]]]) → bn
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Generates a random prime number of bit length bits. If safe is set to true, generates a safe prime. If add is specified, generates a prime that fulfills condition p % add = rem.
Parameters¶ ↑
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(bn) → aBN
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OpenSSL::BN.new(integer) → aBN
OpenSSL::BN.new(string) → aBN
OpenSSL::BN.new(string, 0 | 2 | 10 | 16) → aBN
Construct a new OpenSSL BIGNUM object.
static VALUE
ossl_bn_initialize(int argc, VALUE *argv, VALUE self)
{
BIGNUM *bn;
VALUE str, bs;
int base = 10;
char *ptr;
if (rb_scan_args(argc, argv, "11", &str, &bs) == 2) {
base = NUM2INT(bs);
}
if (NIL_P(str)) {
ossl_raise(rb_eArgError, "invalid argument");
}
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:
ptr = StringValuePtr(str);
if (!BN_mpi2bn((unsigned char *)ptr, RSTRING_LENINT(str), bn)) {
ossl_raise(eBNError, NULL);
}
break;
case 2:
ptr = StringValuePtr(str);
if (!BN_bin2bn((unsigned char *)ptr, 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;
}
Public Instance Methods
bn % bn2 → aBN
bn * bn2 → aBN
bn ** bn2 → aBN
bn + bn2 → aBN
+bn → aBN
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static VALUE
ossl_bn_uplus(VALUE self)
{
return self;
}
bn - bn2 → aBN
-bn → aBN
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static VALUE
ossl_bn_uminus(VALUE self)
{
VALUE obj;
BIGNUM *bn1, *bn2;
GetBN(self, bn1);
obj = NewBN(cBN);
bn2 = BN_dup(bn1);
if (!bn2)
ossl_raise(eBNError, "BN_dup");
SetBN(obj, bn2);
BN_set_negative(bn2, !BN_is_negative(bn2));
return obj;
}
bn1 / bn2 → [result, remainder]
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Division of OpenSSL::BN instances
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
bn == obj → true or false
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Returns true only if obj has the same value as bn. Contrast this with OpenSSL::BN#eql?, which requires obj to be 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;
}
Also aliased as: ===
===(p1)
Returns true only if obj has the same value as bn. Contrast this with OpenSSL::BN#eql?, which requires obj to be OpenSSL::BN.
Alias for: ==
bn >> bits → aBN
bit_set?(bit) → true | false
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Tests bit bit in bn and returns true if set, false if not set.
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
coerce(p1)
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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);
}
eql?(obj) → true or false
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Returns true only if obj is a OpenSSL::BN with the same value as bn. Contrast this with OpenSSL::BN#==, which performs type conversions.
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 → Integer
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Returns a hash code for this object.
See also Object#hash.
static VALUE
ossl_bn_hash(VALUE self)
{
BIGNUM *bn;
VALUE tmp, hash;
unsigned char *buf;
int len;
GetBN(self, bn);
len = BN_num_bytes(bn);
buf = ALLOCV(tmp, len);
if (BN_bn2bin(bn, buf) != len) {
ALLOCV_END(tmp);
ossl_raise(eBNError, "BN_bn2bin");
}
hash = ST2FIX(rb_memhash(buf, len));
ALLOCV_END(tmp);
return hash;
}
initialize_copy(p1)
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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;
}
Also aliased as: copy
lshift!(bits) → self
mod_add(bn1, bn2) → aBN
mod_exp(bn1, bn2) → aBN
mod_inverse(bn2) → aBN
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static VALUE
ossl_bn_mod_inverse(VALUE self, VALUE other)
{
BIGNUM *bn1, *bn2 = GetBNPtr(other), *result;
VALUE obj;
GetBN(self, bn1);
obj = NewBN(rb_obj_class(self));
if (!(result = BN_mod_inverse(NULL, bn1, bn2, ossl_bn_ctx)))
ossl_raise(eBNError, "BN_mod_inverse");
SetBN(obj, result);
return obj;
}
mod_mul(bn1, bn2) → aBN
mod_sqr(bn2) → aBN
mod_sub(bn1, bn2) → aBN
negative? → true | false
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static VALUE
ossl_bn_is_negative(VALUE self)
{
BIGNUM *bn;
GetBN(self, bn);
if (BN_is_zero(bn))
return Qfalse;
return BN_is_negative(bn) ? Qtrue : Qfalse;
}
num_bits → integer
num_bytes → integer
odd? → true | false
one? → true | false
pretty_print(q)
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# File openssl/lib/openssl/bn.rb, line 20 def pretty_print(q) q.object_group(self) { q.text ' ' q.text to_i.to_s } end
prime? → true | false
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prime?(checks) → true | false
Performs a Miller-Rabin probabilistic primality test with checks iterations. If checks is not specified, a number of iterations is used that yields a false positive rate of at most 2^-80 for random input.
Parameters¶ ↑
-
checks - integer
static VALUE
ossl_bn_is_prime(int argc, VALUE *argv, VALUE self)
{
BIGNUM *bn;
VALUE vchecks;
int checks = BN_prime_checks;
if (rb_scan_args(argc, argv, "01", &vchecks) == 1) {
checks = NUM2INT(vchecks);
}
GetBN(self, bn);
switch (BN_is_prime_ex(bn, checks, ossl_bn_ctx, NULL)) {
case 1:
return Qtrue;
case 0:
return Qfalse;
default:
ossl_raise(eBNError, NULL);
}
/* not reachable */
return Qnil;
}
prime_fasttest? → true | false
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prime_fasttest?(checks) → true | false
prime_fasttest?(checks, trial_div) → true | false
Performs a Miller-Rabin primality test. This is same as prime? except this first attempts trial divisions with some small primes.
Parameters¶ ↑
-
checks - integer
-
trial_div - boolean
static 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()
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static VALUE
ossl_bn_to_bn(VALUE self)
{
return self;
}
to_i → integer
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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_s → string
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to_s(base) → string
Parameters¶ ↑
-
base -
IntegerValid values:-
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