Class: OpenSSL::BN

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/openssl/bn.rb,
ext/openssl/ossl_bn.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#OpenSSL::BN.new(bn) ⇒ Object #OpenSSL::BN.new(integer) ⇒ Object #OpenSSL::BN.new(string) ⇒ Object #OpenSSL::BN.new(string, 0|2|10|16) ⇒ Object

Construct a new OpenSSL BIGNUM object.



183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
 
# File 'ext/openssl/ossl_bn.c', line 183

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;
}

Class Method Details

.generate_prime ⇒ Object

.pseudo_rand ⇒ Object

BN.pseudo_rand(bits [, fill [, odd]]) -> aBN

.pseudo_rand_range(range) ⇒ Object

.rand ⇒ Object

BN.rand(bits [, fill [, odd]]) -> aBN

.rand_range(range) ⇒ Object

Instance Method Details

#%(bn2) ⇒ Object

#*(bn2) ⇒ Object

#**(bn2) ⇒ Object

#+(bn2) ⇒ Object

#+ ⇒ Object 



876
877
878
879
880
 
# File 'ext/openssl/ossl_bn.c', line 876

static VALUE
ossl_bn_uplus(VALUE self)
{
    return self;
}

#-(bn2) ⇒ Object

#- ⇒ Object 



886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
 
# File 'ext/openssl/ossl_bn.c', line 886

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;
}

#/ ⇒ Object

#<<(bits) ⇒ Object

#== ⇒ Object Also known as: ===

#>>(bits) ⇒ Object

#bit_set? ⇒ Boolean

#clear_bit!(bit) ⇒ self

#cmp(bn2) ⇒ Integer Also known as: <=>

#coerce(other) ⇒ Object 



328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
 
# File 'ext/openssl/ossl_bn.c', line 328

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 ⇒ Object

#eql?(obj) ⇒ Boolean

Returns true only if obj is a OpenSSL::BN with the same value as bn. Contrast this with OpenSSL::BN#==, which performs type conversions.



963
964
965
966
967
968
969
970
971
972
973
974
 
# File 'ext/openssl/ossl_bn.c', line 963

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) ⇒ Object

#hash ⇒ Integer

Returns a hash code for this object.

See also Object#hash.



984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
 
# File 'ext/openssl/ossl_bn.c', line 984

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 ⇒ Object

#lshift!(bits) ⇒ self

#mask_bits! ⇒ Object

#mod_add(bn1, bn2) ⇒ Object

#mod_exp(bn1, bn2) ⇒ Object

#mod_inverse(bn2) ⇒ Object

#mod_mul(bn1, bn2) ⇒ Object

#mod_sqr(bn2) ⇒ Object

#mod_sub(bn1, bn2) ⇒ Object

#negative? ⇒ Boolean

#num_bits ⇒ Integer

#num_bytes ⇒ Integer

#odd? ⇒ Boolean

#one? ⇒ Boolean

#pretty_print(q) ⇒ Object 



20
21
22
23
24
25
 
# File 'lib/openssl/bn.rb', line 20

def pretty_print(q)
  q.object_group(self) {
    q.text ' '
    q.text to_i.to_s
  }
end

#prime? ⇒ Boolean #prime?(checks) ⇒ Boolean

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



1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
 
# File 'ext/openssl/ossl_bn.c', line 1018

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? ⇒ Boolean #prime_fasttest?(checks) ⇒ Boolean #prime_fasttest?(checks, trial_div) ⇒ Boolean

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



1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
 
# File 'ext/openssl/ossl_bn.c', line 1054

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 ⇒ Object

#to_bn ⇒ Object 



322
323
324
325
326
 
# File 'ext/openssl/ossl_bn.c', line 322

static VALUE
ossl_bn_to_bn(VALUE self)
{
    return self;
}

#to_i ⇒ Integer Also known as: to_int 



304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
 
# File 'ext/openssl/ossl_bn.c', line 304

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;
}

#to_s ⇒ String #to_s(base) ⇒ String

Parameters

  • base - Integer Valid values:

    • 0 - MPI

    • 2 - binary

    • 10 - the default

    • 16 - hex



260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
 
# File 'ext/openssl/ossl_bn.c', line 260

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? ⇒ Boolean