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rewriting most of the asn1 init code in ruby
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to have as much of the lib in ruby as possible
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@HoneyryderChuck
HoneyryderChuck committed Jun 14, 2024
1 parent c737234 commit b83c64e
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Showing 4 changed files with 212 additions and 215 deletions.
236 changes: 21 additions & 215 deletions ext/openssl/ossl_asn1.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,6 @@

static VALUE ossl_asn1_decode0(unsigned char **pp, long length, long *offset,
int depth, int yield, long *num_read);
static VALUE ossl_asn1_initialize(int argc, VALUE *argv, VALUE self);

/*
* DATE conversion
Expand Down Expand Up @@ -158,10 +157,6 @@ asn1integer_to_num_i(VALUE arg)
#define ossl_asn1_get_tag_class(o) rb_attr_get((o),sivTAG_CLASS)
#define ossl_asn1_get_indefinite_length(o) rb_attr_get((o),sivINDEFINITE_LENGTH)

#define ossl_asn1_set_value(o,v) rb_ivar_set((o),sivVALUE,(v))
#define ossl_asn1_set_tag(o,v) rb_ivar_set((o),sivTAG,(v))
#define ossl_asn1_set_tagging(o,v) rb_ivar_set((o),sivTAGGING,(v))
#define ossl_asn1_set_tag_class(o,v) rb_ivar_set((o),sivTAG_CLASS,(v))
#define ossl_asn1_set_indefinite_length(o,v) rb_ivar_set((o),sivINDEFINITE_LENGTH,(v))

VALUE mASN1;
Expand Down Expand Up @@ -189,7 +184,6 @@ VALUE cASN1Sequence, cASN1Set; /* CONSTRUCTIVE */
static VALUE sym_IMPLICIT, sym_EXPLICIT;
static VALUE sym_UNIVERSAL, sym_APPLICATION, sym_CONTEXT_SPECIFIC, sym_PRIVATE;
static ID sivVALUE, sivTAG, sivTAG_CLASS, sivTAGGING, sivINDEFINITE_LENGTH, sivUNUSED_BITS;
static ID id_each;

/*
* Ruby to ASN1 converters
Expand Down Expand Up @@ -638,35 +632,6 @@ ossl_asn1_class2sym(int tc)
return sym_UNIVERSAL;
}

/*
* call-seq:
* OpenSSL::ASN1::ASN1Data.new(value, tag, tag_class) => ASN1Data
*
* _value_: Please have a look at Constructive and Primitive to see how Ruby
* types are mapped to ASN.1 types and vice versa.
*
* _tag_: An Integer indicating the tag number.
*
* _tag_class_: A Symbol indicating the tag class. Please cf. ASN1 for
* possible values.
*
* == Example
* asn1_int = OpenSSL::ASN1Data.new(42, 2, :UNIVERSAL) # => Same as OpenSSL::ASN1::Integer.new(42)
* tagged_int = OpenSSL::ASN1Data.new(42, 0, :CONTEXT_SPECIFIC) # implicitly 0-tagged INTEGER
*/
static VALUE
ossl_asn1data_initialize(VALUE self, VALUE value, VALUE tag, VALUE tag_class)
{
if(!SYMBOL_P(tag_class))
ossl_raise(eASN1Error, "invalid tag class");
ossl_asn1_set_tag(self, tag);
ossl_asn1_set_value(self, value);
ossl_asn1_set_tag_class(self, tag_class);
ossl_asn1_set_indefinite_length(self, Qfalse);

return self;
}

static VALUE
to_der_internal(VALUE self, int constructed, int indef_len, VALUE body)
{
Expand Down Expand Up @@ -795,20 +760,19 @@ int_ossl_asn1_decode0_prim(unsigned char **pp, long length, long hlen, int tag,
if (tc == sym_UNIVERSAL &&
tag < ossl_asn1_info_size && ossl_asn1_info[tag].klass) {
VALUE klass = *ossl_asn1_info[tag].klass;
VALUE args[4];
args[0] = value;
args[1] = INT2NUM(tag);
args[2] = Qnil;
args[3] = tc;
asn1data = rb_obj_alloc(klass);
ossl_asn1_initialize(4, args, asn1data);
if (tag == V_ASN1_EOC)
asn1data = rb_funcall(cASN1EndOfContent, rb_intern("new"), 0);
else {
VALUE args[4] = { value, INT2NUM(tag), Qnil, tc };
asn1data = rb_funcallv_public(klass, rb_intern("new"), 4, args);
}
if(tag == V_ASN1_BIT_STRING){
rb_ivar_set(asn1data, sivUNUSED_BITS, LONG2NUM(flag));
}
}
else {
asn1data = rb_obj_alloc(cASN1Data);
ossl_asn1data_initialize(asn1data, value, INT2NUM(tag), tc);
VALUE args[3] = { value, INT2NUM(tag), tc };
asn1data = rb_funcall3(cASN1Data, rb_intern("new"), 3, args);
}

return asn1data;
Expand Down Expand Up @@ -842,20 +806,20 @@ int_ossl_asn1_decode0_cons(unsigned char **pp, long max_len, long length,
}

if (tc == sym_UNIVERSAL) {
VALUE args[4];
if (tag == V_ASN1_SEQUENCE || tag == V_ASN1_SET)
asn1data = rb_obj_alloc(*ossl_asn1_info[tag].klass);
else
asn1data = rb_obj_alloc(cASN1Constructive);
args[0] = ary;
args[1] = INT2NUM(tag);
args[2] = Qnil;
args[3] = tc;
ossl_asn1_initialize(4, args, asn1data);
if (tag == V_ASN1_SEQUENCE) {
VALUE args[4] = { ary, INT2NUM(tag), Qnil, tc };
asn1data = rb_funcall3(cASN1Sequence, rb_intern("new"), 4, args);
} else if (tag == V_ASN1_SET) {
VALUE args[4] = { ary, INT2NUM(tag), Qnil, tc };
asn1data = rb_funcall3(cASN1Set, rb_intern("new"), 4, args);
} else {
VALUE args[4] = { ary, INT2NUM(tag), Qnil, tc };
asn1data = rb_funcall3(cASN1Constructive, rb_intern("new"), 4, args);
}
}
else {
asn1data = rb_obj_alloc(cASN1Data);
ossl_asn1data_initialize(asn1data, ary, INT2NUM(tag), tc);
VALUE args[3] = {ary, INT2NUM(tag), tc};
asn1data = rb_funcall3(cASN1Data, rb_intern("new"), 3, args);
}

if (indefinite)
Expand Down Expand Up @@ -1048,83 +1012,6 @@ ossl_asn1_decode_all(VALUE self, VALUE obj)
return ary;
}

/*
* call-seq:
* OpenSSL::ASN1::Primitive.new(value [, tag, tagging, tag_class ]) => Primitive
*
* _value_: is mandatory.
*
* _tag_: optional, may be specified for tagged values. If no _tag_ is
* specified, the UNIVERSAL tag corresponding to the Primitive sub-class
* is used by default.
*
* _tagging_: may be used as an encoding hint to encode a value either
* explicitly or implicitly, see ASN1 for possible values.
*
* _tag_class_: if _tag_ and _tagging_ are +nil+ then this is set to
* +:UNIVERSAL+ by default. If either _tag_ or _tagging_ are set then
* +:CONTEXT_SPECIFIC+ is used as the default. For possible values please
* cf. ASN1.
*
* == Example
* int = OpenSSL::ASN1::Integer.new(42)
* zero_tagged_int = OpenSSL::ASN1::Integer.new(42, 0, :IMPLICIT)
* private_explicit_zero_tagged_int = OpenSSL::ASN1::Integer.new(42, 0, :EXPLICIT, :PRIVATE)
*/
static VALUE
ossl_asn1_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE value, tag, tagging, tag_class;
int default_tag;

rb_scan_args(argc, argv, "13", &value, &tag, &tagging, &tag_class);
default_tag = ossl_asn1_default_tag(self);

if (default_tag == -1 || argc > 1) {
if(NIL_P(tag))
ossl_raise(eASN1Error, "must specify tag number");
if(!NIL_P(tagging) && !SYMBOL_P(tagging))
ossl_raise(eASN1Error, "invalid tagging method");
if(NIL_P(tag_class)) {
if (NIL_P(tagging))
tag_class = sym_UNIVERSAL;
else
tag_class = sym_CONTEXT_SPECIFIC;
}
if(!SYMBOL_P(tag_class))
ossl_raise(eASN1Error, "invalid tag class");
}
else{
tag = INT2NUM(default_tag);
tagging = Qnil;
tag_class = sym_UNIVERSAL;
}
ossl_asn1_set_tag(self, tag);
ossl_asn1_set_value(self, value);
ossl_asn1_set_tagging(self, tagging);
ossl_asn1_set_tag_class(self, tag_class);
ossl_asn1_set_indefinite_length(self, Qfalse);
if (default_tag == V_ASN1_BIT_STRING)
rb_ivar_set(self, sivUNUSED_BITS, INT2FIX(0));

return self;
}

static VALUE
ossl_asn1eoc_initialize(VALUE self) {
VALUE tag, tagging, tag_class, value;
tag = INT2FIX(0);
tagging = Qnil;
tag_class = sym_UNIVERSAL;
value = rb_str_new("", 0);
ossl_asn1_set_tag(self, tag);
ossl_asn1_set_value(self, value);
ossl_asn1_set_tagging(self, tagging);
ossl_asn1_set_tag_class(self, tag_class);
ossl_asn1_set_indefinite_length(self, Qfalse);
return self;
}

static VALUE
ossl_asn1eoc_to_der(VALUE self)
{
Expand Down Expand Up @@ -1216,27 +1103,6 @@ ossl_asn1cons_to_der(VALUE self)
return to_der_internal(self, 1, indef_len, str);
}

/*
* call-seq:
* asn1_ary.each { |asn1| block } => asn1_ary
*
* Calls the given block once for each element in self, passing that element
* as parameter _asn1_. If no block is given, an enumerator is returned
* instead.
*
* == Example
* asn1_ary.each do |asn1|
* puts asn1
* end
*/
static VALUE
ossl_asn1cons_each(VALUE self)
{
rb_block_call(ossl_asn1_get_value(self), id_each, 0, 0, 0, 0);

return self;
}

/*
* call-seq:
* OpenSSL::ASN1::ObjectId.register(object_id, short_name, long_name)
Expand Down Expand Up @@ -1657,42 +1523,6 @@ Init_ossl_asn1(void)
* puts int2.value # => 1
*/
cASN1Data = rb_define_class_under(mASN1, "ASN1Data", rb_cObject);
/*
* Carries the value of a ASN.1 type.
* Please confer Constructive and Primitive for the mappings between
* ASN.1 data types and Ruby classes.
*/
rb_attr(cASN1Data, rb_intern("value"), 1, 1, 0);
/*
* An Integer representing the tag number of this ASN1Data. Never +nil+.
*/
rb_attr(cASN1Data, rb_intern("tag"), 1, 1, 0);
/*
* A Symbol representing the tag class of this ASN1Data. Never +nil+.
* See ASN1Data for possible values.
*/
rb_attr(cASN1Data, rb_intern("tag_class"), 1, 1, 0);
/*
* Never +nil+. A boolean value indicating whether the encoding uses
* indefinite length (in the case of parsing) or whether an indefinite
* length form shall be used (in the encoding case).
* In DER, every value uses definite length form. But in scenarios where
* large amounts of data need to be transferred it might be desirable to
* have some kind of streaming support available.
* For example, huge OCTET STRINGs are preferably sent in smaller-sized
* chunks, each at a time.
* This is possible in BER by setting the length bytes of an encoding
* to zero and by this indicating that the following value will be
* sent in chunks. Indefinite length encodings are always constructed.
* The end of such a stream of chunks is indicated by sending a EOC
* (End of Content) tag. SETs and SEQUENCEs may use an indefinite length
* encoding, but also primitive types such as e.g. OCTET STRINGS or
* BIT STRINGS may leverage this functionality (cf. ITU-T X.690).
*/
rb_attr(cASN1Data, rb_intern("indefinite_length"), 1, 1, 0);
rb_define_alias(cASN1Data, "infinite_length", "indefinite_length");
rb_define_alias(cASN1Data, "infinite_length=", "indefinite_length=");
rb_define_method(cASN1Data, "initialize", ossl_asn1data_initialize, 3);
rb_define_method(cASN1Data, "to_der", ossl_asn1data_to_der, 0);

/* Document-class: OpenSSL::ASN1::Primitive
Expand Down Expand Up @@ -1760,16 +1590,6 @@ Init_ossl_asn1(void)
* prim_zero_tagged_explicit = <class>.new(value, 0, :EXPLICIT)
*/
cASN1Primitive = rb_define_class_under(mASN1, "Primitive", cASN1Data);
/*
* May be used as a hint for encoding a value either implicitly or
* explicitly by setting it either to +:IMPLICIT+ or to +:EXPLICIT+.
* _tagging_ is not set when a ASN.1 structure is parsed using
* OpenSSL::ASN1.decode.
*/
rb_attr(cASN1Primitive, rb_intern("tagging"), 1, 1, Qtrue);
rb_undef_method(cASN1Primitive, "indefinite_length=");
rb_undef_method(cASN1Primitive, "infinite_length=");
rb_define_method(cASN1Primitive, "initialize", ossl_asn1_initialize, -1);
rb_define_method(cASN1Primitive, "to_der", ossl_asn1prim_to_der, 0);

/* Document-class: OpenSSL::ASN1::Constructive
Expand Down Expand Up @@ -1800,17 +1620,7 @@ Init_ossl_asn1(void)
* set = OpenSSL::ASN1::Set.new( [ int, str ] )
*/
cASN1Constructive = rb_define_class_under(mASN1,"Constructive", cASN1Data);
rb_include_module(cASN1Constructive, rb_mEnumerable);
/*
* May be used as a hint for encoding a value either implicitly or
* explicitly by setting it either to +:IMPLICIT+ or to +:EXPLICIT+.
* _tagging_ is not set when a ASN.1 structure is parsed using
* OpenSSL::ASN1.decode.
*/
rb_attr(cASN1Constructive, rb_intern("tagging"), 1, 1, Qtrue);
rb_define_method(cASN1Constructive, "initialize", ossl_asn1_initialize, -1);
rb_define_method(cASN1Constructive, "to_der", ossl_asn1cons_to_der, 0);
rb_define_method(cASN1Constructive, "each", ossl_asn1cons_each, 0);

#define OSSL_ASN1_DEFINE_CLASS(name, super) \
do{\
Expand Down Expand Up @@ -1859,13 +1669,10 @@ do{\
rb_define_alias(cASN1ObjectId, "short_name", "sn");
rb_define_alias(cASN1ObjectId, "long_name", "ln");
rb_define_method(cASN1ObjectId, "==", ossl_asn1obj_eq, 1);
rb_attr(cASN1BitString, rb_intern("unused_bits"), 1, 1, 0);

rb_define_method(cASN1EndOfContent, "initialize", ossl_asn1eoc_initialize, 0);
rb_define_method(cASN1EndOfContent, "to_der", ossl_asn1eoc_to_der, 0);

class_tag_map = rb_hash_new();
rb_gc_register_mark_object(class_tag_map);
rb_hash_aset(class_tag_map, cASN1EndOfContent, INT2NUM(V_ASN1_EOC));
rb_hash_aset(class_tag_map, cASN1Boolean, INT2NUM(V_ASN1_BOOLEAN));
rb_hash_aset(class_tag_map, cASN1Integer, INT2NUM(V_ASN1_INTEGER));
Expand All @@ -1889,6 +1696,5 @@ do{\
rb_hash_aset(class_tag_map, cASN1GeneralString, INT2NUM(V_ASN1_GENERALSTRING));
rb_hash_aset(class_tag_map, cASN1UniversalString, INT2NUM(V_ASN1_UNIVERSALSTRING));
rb_hash_aset(class_tag_map, cASN1BMPString, INT2NUM(V_ASN1_BMPSTRING));

id_each = rb_intern_const("each");
rb_define_const(mASN1, "CLASS_TAG_MAP", class_tag_map);
}
2 changes: 2 additions & 0 deletions ext/openssl/ossl_asn1.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -55,6 +55,8 @@ extern VALUE cASN1ObjectId; /* OBJECT IDENTIFIER */
extern VALUE cASN1UTCTime, cASN1GeneralizedTime; /* TIME */
extern VALUE cASN1Sequence, cASN1Set; /* CONSTRUCTIVE */

extern VALUE cASN1EndOfContent; /* END OF CONTENT */

ASN1_TYPE *ossl_asn1_get_asn1type(VALUE);

void Init_ossl_asn1(void);
Expand Down
1 change: 1 addition & 0 deletions lib/openssl.rb
View file
Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
require 'openssl.so'

require_relative 'openssl/bn'
require_relative 'openssl/asn1'
require_relative 'openssl/pkey'
require_relative 'openssl/cipher'
require_relative 'openssl/digest'
Expand Down
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