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ruby--ruby/ext/openssl/ossl_asn1.c
gotoyuzo 8180c1bd50 * ext/openssl/ossl_asn1.c (ossl_asn1_decode_all): use rb_str_new4 
to avoid SEGV.

* ext/openssl/ossl_asn1.c (ossl_asn1_traverse, ossl_asn1_decode,
  ossl_asn1_decode_all): temporary value should be marked volatile.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7626 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2004-12-21 13:09:26 +00:00

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/*
* $Id$
* 'OpenSSL for Ruby' team members
* Copyright (C) 2003
* All rights reserved.
*/
/*
* This program is licenced under the same licence as Ruby.
* (See the file 'LICENCE'.)
*/
#include "ossl.h"
#if defined(HAVE_SYS_TIME_H)
# include <sys/time.h>
#elif !defined(NT) && !defined(_WIN32)
struct timeval {
long tv_sec; /* seconds */
long tv_usec; /* and microseconds */
};
#endif
/*
* DATE conversion
*/
VALUE
asn1time_to_time(ASN1_TIME *time)
{
struct tm tm;
VALUE argv[6];
if (!time || !time->data) return Qnil;
memset(&tm, 0, sizeof(struct tm));
switch (time->type) {
case V_ASN1_UTCTIME:
if (sscanf(time->data, "%2d%2d%2d%2d%2d%2dZ", &tm.tm_year, &tm.tm_mon,
&tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
ossl_raise(rb_eTypeError, "bad UTCTIME format");
}
if (tm.tm_year < 69) {
tm.tm_year += 2000;
} else {
tm.tm_year += 1900;
}
tm.tm_mon -= 1;
break;
case V_ASN1_GENERALIZEDTIME:
if (sscanf(time->data, "%4d%2d%2d%2d%2d%2dZ", &tm.tm_year, &tm.tm_mon,
&tm.tm_mday, &tm.tm_hour, &tm.tm_min, &tm.tm_sec) != 6) {
ossl_raise(rb_eTypeError, "bad GENERALIZEDTIME format" );
}
tm.tm_mon -= 1;
break;
default:
rb_warning("unknown time format");
return Qnil;
}
argv[0] = INT2NUM(tm.tm_year);
argv[1] = INT2NUM(tm.tm_mon+1);
argv[2] = INT2NUM(tm.tm_mday);
argv[3] = INT2NUM(tm.tm_hour);
argv[4] = INT2NUM(tm.tm_min);
argv[5] = INT2NUM(tm.tm_sec);
return rb_funcall2(rb_cTime, rb_intern("utc"), 6, argv);
}
/*
* This function is not exported in Ruby's *.h
*/
extern struct timeval rb_time_timeval(VALUE);
time_t
time_to_time_t(VALUE time)
{
return (time_t)NUM2LONG(rb_Integer(time));
}
/*
* ASN1_INTEGER conversions
* TODO: Make a decision what's the right way to do this.
*/
#define DO_IT_VIA_RUBY 0
VALUE
asn1integer_to_num(ASN1_INTEGER *ai)
{
BIGNUM *bn;
#if DO_IT_VIA_RUBY
char *txt;
#endif
VALUE num;
if (!ai) {
ossl_raise(rb_eTypeError, "ASN1_INTEGER is NULL!");
}
if (!(bn = ASN1_INTEGER_to_BN(ai, NULL))) {
ossl_raise(eOSSLError, NULL);
}
#if DO_IT_VIA_RUBY
if (!(txt = BN_bn2dec(bn))) {
BN_free(bn);
ossl_raise(eOSSLError, NULL);
}
num = rb_cstr_to_inum(txt, 10, Qtrue);
OPENSSL_free(txt);
#else
num = ossl_bn_new(bn);
#endif
BN_free(bn);
return num;
}
#if DO_IT_VIA_RUBY
ASN1_INTEGER *
num_to_asn1integer(VALUE obj, ASN1_INTEGER *ai)
{
BIGNUM *bn = NULL;
if (RTEST(rb_obj_is_kind_of(obj, cBN))) {
bn = GetBNPtr(obj);
} else {
obj = rb_String(obj);
if (!BN_dec2bn(&bn, StringValuePtr(obj))) {
ossl_raise(eOSSLError, NULL);
}
}
if (!(ai = BN_to_ASN1_INTEGER(bn, ai))) {
BN_free(bn);
ossl_raise(eOSSLError, NULL);
}
BN_free(bn);
return ai;
}
#else
ASN1_INTEGER *
num_to_asn1integer(VALUE obj, ASN1_INTEGER *ai)
{
BIGNUM *bn = GetBNPtr(obj);
if (!(ai = BN_to_ASN1_INTEGER(bn, ai))) {
ossl_raise(eOSSLError, NULL);
}
return ai;
}
#endif
/********/
/*
* ASN1 module
*/
#define ossl_asn1_get_value(o) rb_attr_get((o),rb_intern("@value"))
#define ossl_asn1_get_tag(o) rb_attr_get((o),rb_intern("@tag"))
#define ossl_asn1_get_tagging(o) rb_attr_get((o),rb_intern("@tagging"))
#define ossl_asn1_get_tag_class(o) rb_attr_get((o),rb_intern("@tag_class"))
#define ossl_asn1_set_value(o,v) rb_iv_set((o),"@value",(v))
#define ossl_asn1_set_tag(o,v) rb_iv_set((o),"@tag",(v))
#define ossl_asn1_set_tagging(o,v) rb_iv_set((o),"@tagging",(v))
#define ossl_asn1_set_tag_class(o,v) rb_iv_set((o),"@tag_class",(v))
VALUE mASN1;
VALUE eASN1Error;
VALUE cASN1Data;
VALUE cASN1Primitive;
VALUE cASN1Constructive;
VALUE cASN1Boolean; /* BOOLEAN */
VALUE cASN1Integer, cASN1Enumerated; /* INTEGER */
VALUE cASN1BitString; /* BIT STRING */
VALUE cASN1OctetString, cASN1UTF8String; /* STRINGs */
VALUE cASN1NumericString, cASN1PrintableString;
VALUE cASN1T61String, cASN1VideotexString;
VALUE cASN1IA5String, cASN1GraphicString;
VALUE cASN1ISO64String, cASN1GeneralString;
VALUE cASN1UniversalString, cASN1BMPString;
VALUE cASN1Null; /* NULL */
VALUE cASN1ObjectId; /* OBJECT IDENTIFIER */
VALUE cASN1UTCTime, cASN1GeneralizedTime; /* TIME */
VALUE cASN1Sequence, cASN1Set; /* CONSTRUCTIVE */
static ID sIMPLICIT, sEXPLICIT;
static ID sUNIVERSAL, sAPPLICATION, sCONTEXT_SPECIFIC, sPRIVATE;
/*
* Ruby to ASN1 converters
*/
static ASN1_BOOLEAN
obj_to_asn1bool(VALUE obj)
{
return RTEST(obj) ? 0xff : 0x100;
}
static ASN1_INTEGER*
obj_to_asn1int(VALUE obj)
{
return num_to_asn1integer(obj, NULL);
}
static ASN1_BIT_STRING*
obj_to_asn1bstr(VALUE obj, long unused_bits)
{
ASN1_BIT_STRING *bstr;
if(unused_bits < 0) unused_bits = 0;
StringValue(obj);
if(!(bstr = ASN1_BIT_STRING_new()))
ossl_raise(eASN1Error, NULL);
ASN1_BIT_STRING_set(bstr, RSTRING(obj)->ptr, RSTRING(obj)->len);
bstr->flags &= ~(ASN1_STRING_FLAG_BITS_LEFT|0x07); /* clear */
bstr->flags |= ASN1_STRING_FLAG_BITS_LEFT|(unused_bits&0x07);
return bstr;
}
static ASN1_STRING*
obj_to_asn1str(VALUE obj)
{
ASN1_STRING *str;
StringValue(obj);
if(!(str = ASN1_STRING_new()))
ossl_raise(eASN1Error, NULL);
ASN1_STRING_set(str, RSTRING(obj)->ptr, RSTRING(obj)->len);
return str;
}
static ASN1_NULL*
obj_to_asn1null(VALUE obj)
{
ASN1_NULL *null;
if(!NIL_P(obj))
ossl_raise(eASN1Error, "nil expected");
if(!(null = ASN1_NULL_new()))
ossl_raise(eASN1Error, NULL);
return null;
}
static ASN1_OBJECT*
obj_to_asn1obj(VALUE obj)
{
ASN1_OBJECT *a1obj;
StringValue(obj);
a1obj = OBJ_txt2obj(RSTRING(obj)->ptr, 0);
if(!a1obj) a1obj = OBJ_txt2obj(RSTRING(obj)->ptr, 1);
if(!a1obj) ossl_raise(eASN1Error, "invalid OBJECT ID");
return a1obj;
}
static ASN1_UTCTIME*
obj_to_asn1utime(VALUE time)
{
time_t sec;
ASN1_UTCTIME *t;
sec = time_to_time_t(time);
if(!(t = ASN1_UTCTIME_set(NULL, sec)))
ossl_raise(eASN1Error, NULL);
return t;
}
static ASN1_GENERALIZEDTIME*
obj_to_asn1gtime(VALUE time)
{
time_t sec;
ASN1_GENERALIZEDTIME *t;
sec = time_to_time_t(time);
if(!(t =ASN1_GENERALIZEDTIME_set(NULL, sec)))
ossl_raise(eASN1Error, NULL);
return t;
}
static ASN1_STRING*
obj_to_asn1derstr(VALUE obj)
{
ASN1_STRING *a1str;
VALUE str;
str = ossl_to_der(obj);
if(!(a1str = ASN1_STRING_new()))
ossl_raise(eASN1Error, NULL);
ASN1_STRING_set(a1str, RSTRING(str)->ptr, RSTRING(str)->len);
return a1str;
}
/*
* DER to Ruby converters
*/
static VALUE
decode_bool(unsigned char* der, int length)
{
int bool;
unsigned char *p;
p = der;
if((bool = d2i_ASN1_BOOLEAN(NULL, &p, length)) < 0)
ossl_raise(eASN1Error, NULL);
return bool ? Qtrue : Qfalse;
}
static VALUE
decode_int(unsigned char* der, int length)
{
ASN1_INTEGER *ai;
unsigned char *p;
VALUE ret;
int status = 0;
p = der;
if(!(ai = d2i_ASN1_INTEGER(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
ret = rb_protect((VALUE(*)_((VALUE)))asn1integer_to_num,
(VALUE)ai, &status);
ASN1_INTEGER_free(ai);
if(status) rb_jump_tag(status);
return ret;
}
static VALUE
decode_bstr(unsigned char* der, int length, long *unused_bits)
{
ASN1_BIT_STRING *bstr;
unsigned char *p, *buf;
long len;
VALUE ret;
p = der;
if(!(bstr = d2i_ASN1_BIT_STRING(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
len = bstr->length;
if(!(buf = OPENSSL_malloc(len))){
ASN1_BIT_STRING_free(bstr);
ossl_raise(eASN1Error, NULL);
}
*unused_bits = 0;
if(bstr->flags & ASN1_STRING_FLAG_BITS_LEFT)
*unused_bits = bstr->flags & 0x07;
memcpy(buf, bstr->data, len);
ASN1_BIT_STRING_free(bstr);
ret = ossl_buf2str(buf, len);
return ret;
}
static VALUE
decode_enum(unsigned char* der, int length)
{
ASN1_ENUMERATED *ai;
unsigned char *p;
VALUE ret;
int status = 0;
p = der;
if(!(ai = d2i_ASN1_ENUMERATED(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
ret = rb_protect((VALUE(*)_((VALUE)))asn1integer_to_num,
(VALUE)ai, &status);
ASN1_ENUMERATED_free(ai);
if(status) rb_jump_tag(status);
return ret;
}
static VALUE
decode_null(unsigned char* der, int length)
{
ASN1_NULL *null;
unsigned char *p;
p = der;
if(!(null = d2i_ASN1_NULL(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
ASN1_NULL_free(null);
return Qnil;
}
static VALUE
decode_obj(unsigned char* der, int length)
{
ASN1_OBJECT *obj;
unsigned char *p;
VALUE ret;
int nid;
BIO *bio;
p = der;
if(!(obj = d2i_ASN1_OBJECT(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
if((nid = OBJ_obj2nid(obj)) != NID_undef){
ASN1_OBJECT_free(obj);
ret = rb_str_new2(OBJ_nid2sn(nid));
}
else{
if(!(bio = BIO_new(BIO_s_mem()))){
ASN1_OBJECT_free(obj);
ossl_raise(eASN1Error, NULL);
}
i2a_ASN1_OBJECT(bio, obj);
ASN1_OBJECT_free(obj);
ret = ossl_membio2str(bio);
}
return ret;
}
static VALUE
decode_time(unsigned char* der, int length)
{
ASN1_TIME *time;
unsigned char *p;
VALUE ret;
int status = 0;
p = der;
if(!(time = d2i_ASN1_TIME(NULL, &p, length)))
ossl_raise(eASN1Error, NULL);
ret = rb_protect((VALUE(*)_((VALUE)))asn1time_to_time,
(VALUE)time, &status);
ASN1_TIME_free(time);
if(status) rb_jump_tag(status);
return ret;
}
/********/
typedef struct {
char *name;
VALUE *klass;
} ossl_asn1_info_t;
static ossl_asn1_info_t ossl_asn1_info[] = {
{ "EOC", NULL, }, /* 0 */
{ "BOOLEAN", &cASN1Boolean, }, /* 1 */
{ "INTEGER", &cASN1Integer, }, /* 2 */
{ "BIT_STRING", &cASN1BitString, }, /* 3 */
{ "OCTET_STRING", &cASN1OctetString, }, /* 4 */
{ "NULL", &cASN1Null, }, /* 5 */
{ "OBJECT", &cASN1ObjectId, }, /* 6 */
{ "OBJECT_DESCRIPTOR", NULL, }, /* 7 */
{ "EXTERNAL", NULL, }, /* 8 */
{ "REAL", NULL, }, /* 9 */
{ "ENUMERATED", &cASN1Enumerated, }, /* 10 */
{ "EMBEDDED_PDV", NULL, }, /* 11 */
{ "UTF8STRING", &cASN1UTF8String, }, /* 12 */
{ "RELATIVE_OID", NULL, }, /* 13 */
{ "[UNIVERSAL 14]", NULL, }, /* 14 */
{ "[UNIVERSAL 15]", NULL, }, /* 15 */
{ "SEQUENCE", &cASN1Sequence, }, /* 16 */
{ "SET", &cASN1Set, }, /* 17 */
{ "NUMERICSTRING", &cASN1NumericString, }, /* 18 */
{ "PRINTABLESTRING", &cASN1PrintableString, }, /* 19 */
{ "T61STRING", &cASN1T61String, }, /* 20 */
{ "VIDEOTEXSTRING", &cASN1VideotexString, }, /* 21 */
{ "IA5STRING", &cASN1IA5String, }, /* 22 */
{ "UTCTIME", &cASN1UTCTime, }, /* 23 */
{ "GENERALIZEDTIME", &cASN1GeneralizedTime, }, /* 24 */
{ "GRAPHICSTRING", &cASN1GraphicString, }, /* 25 */
{ "ISO64STRING", &cASN1ISO64String, }, /* 26 */
{ "GENERALSTRING", &cASN1GeneralString, }, /* 27 */
{ "UNIVERSALSTRING", &cASN1UniversalString, }, /* 28 */
{ "CHARACTER_STRING", NULL, }, /* 29 */
{ "BMPSTRING", &cASN1BMPString, }, /* 30 */
};
int ossl_asn1_info_size = (sizeof(ossl_asn1_info)/sizeof(ossl_asn1_info[0]));
static int ossl_asn1_default_tag(VALUE obj);
ASN1_TYPE*
ossl_asn1_get_asn1type(VALUE obj)
{
ASN1_TYPE *ret;
VALUE value, rflag;
void *ptr;
void (*free_func)();
long tag, flag;
tag = ossl_asn1_default_tag(obj);
value = ossl_asn1_get_value(obj);
switch(tag){
case V_ASN1_BOOLEAN:
ptr = (void*)obj_to_asn1bool(value);
free_func = NULL;
break;
case V_ASN1_INTEGER: /* FALLTHROUGH */
case V_ASN1_ENUMERATED:
ptr = obj_to_asn1int(value);
free_func = ASN1_INTEGER_free;
break;
case V_ASN1_BIT_STRING:
rflag = rb_attr_get(obj, rb_intern("@unused_bits"));
flag = NIL_P(rflag) ? -1 : NUM2INT(rflag);
ptr = obj_to_asn1bstr(value, flag);
free_func = ASN1_BIT_STRING_free;
break;
case V_ASN1_NULL:
ptr = obj_to_asn1null(value);
free_func = ASN1_NULL_free;
break;
case V_ASN1_OCTET_STRING: /* FALLTHROUGH */
case V_ASN1_UTF8STRING: /* FALLTHROUGH */
case V_ASN1_NUMERICSTRING: /* FALLTHROUGH */
case V_ASN1_PRINTABLESTRING: /* FALLTHROUGH */
case V_ASN1_T61STRING: /* FALLTHROUGH */
case V_ASN1_VIDEOTEXSTRING: /* FALLTHROUGH */
case V_ASN1_IA5STRING: /* FALLTHROUGH */
case V_ASN1_GRAPHICSTRING: /* FALLTHROUGH */
case V_ASN1_ISO64STRING: /* FALLTHROUGH */
case V_ASN1_GENERALSTRING: /* FALLTHROUGH */
case V_ASN1_UNIVERSALSTRING: /* FALLTHROUGH */
case V_ASN1_BMPSTRING:
ptr = obj_to_asn1str(value);
free_func = ASN1_STRING_free;
break;
case V_ASN1_OBJECT:
ptr = obj_to_asn1obj(value);
free_func = ASN1_OBJECT_free;
break;
case V_ASN1_UTCTIME:
ptr = obj_to_asn1utime(value);
free_func = ASN1_TIME_free;
break;
case V_ASN1_GENERALIZEDTIME:
ptr = obj_to_asn1gtime(value);
free_func = ASN1_TIME_free;
break;
case V_ASN1_SET: /* FALLTHROUGH */
case V_ASN1_SEQUENCE:
ptr = obj_to_asn1derstr(obj);
free_func = ASN1_STRING_free;
break;
default:
ossl_raise(eASN1Error, "unsupported ASN.1 type");
}
if(!(ret = OPENSSL_malloc(sizeof(ASN1_TYPE)))){
if(free_func) free_func(ptr);
ossl_raise(eASN1Error, "ASN1_TYPE alloc failure");
}
memset(ret, 0, sizeof(ASN1_TYPE));
ASN1_TYPE_set(ret, tag, ptr);
return ret;
}
static int
ossl_asn1_default_tag(VALUE obj)
{
int i;
for(i = 0; i < ossl_asn1_info_size; i++){
if(ossl_asn1_info[i].klass &&
rb_obj_is_kind_of(obj, *ossl_asn1_info[i].klass)){
return i;
}
}
ossl_raise(eASN1Error, "universal tag for %s not found",
rb_class2name(CLASS_OF(obj)));
return -1; /* dummy */
}
static int
ossl_asn1_tag(VALUE obj)
{
VALUE tag;
tag = ossl_asn1_get_tag(obj);
if(NIL_P(tag))
ossl_raise(eASN1Error, "tag number not specified");
return NUM2INT(tag);
}
static int
ossl_asn1_is_explicit(VALUE obj)
{
VALUE s;
int ret = -1;
s = ossl_asn1_get_tagging(obj);
if(NIL_P(s)) return 0;
else if(SYMBOL_P(s)){
if (SYM2ID(s) == sIMPLICIT)
ret = 0;
else if (SYM2ID(s) == sEXPLICIT)
ret = 1;
}
if(ret < 0){
ossl_raise(eASN1Error, "invalid tag default");
}
return ret;
}
static int
ossl_asn1_tag_class(VALUE obj)
{
VALUE s;
int ret = -1;
s = ossl_asn1_get_tag_class(obj);
if(NIL_P(s)) ret = V_ASN1_UNIVERSAL;
else if(SYMBOL_P(s)){
if (SYM2ID(s) == sUNIVERSAL)
ret = V_ASN1_UNIVERSAL;
else if (SYM2ID(s) == sAPPLICATION)
ret = V_ASN1_APPLICATION;
else if (SYM2ID(s) == sCONTEXT_SPECIFIC)
ret = V_ASN1_CONTEXT_SPECIFIC;
else if (SYM2ID(s) == sPRIVATE)
ret = V_ASN1_PRIVATE;
}
if(ret < 0){
ossl_raise(eASN1Error, "invalid tag class");
}
return ret;
}
static VALUE
ossl_asn1_class2sym(int tc)
{
if((tc & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
return ID2SYM(sPRIVATE);
else if((tc & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
return ID2SYM(sCONTEXT_SPECIFIC);
else if((tc & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
return ID2SYM(sAPPLICATION);
else
return ID2SYM(sUNIVERSAL);
}
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");
if((SYM2ID(tag_class) == sUNIVERSAL) && NUM2INT(tag) > 31)
ossl_raise(eASN1Error, "tag number for Universal too large");
ossl_asn1_set_tag(self, tag);
ossl_asn1_set_value(self, value);
ossl_asn1_set_tag_class(self, tag_class);
return self;
}
static VALUE
join_der_i(VALUE i, VALUE str)
{
i = ossl_to_der_if_possible(i);
StringValue(i);
rb_str_append(str, i);
return Qnil;
}
static VALUE
join_der(VALUE enumerable)
{
VALUE str = rb_str_new(0, 0);
rb_iterate(rb_each, enumerable, join_der_i, str);
return str;
}
static VALUE
ossl_asn1data_to_der(VALUE self)
{
VALUE value, der;
int tag, tag_class, is_cons = 0;
long length;
unsigned char *p;
value = ossl_asn1_get_value(self);
if(rb_obj_is_kind_of(value, rb_cArray)){
is_cons = 1;
value = join_der(value);
}
StringValue(value);
tag = ossl_asn1_tag(self);
tag_class = ossl_asn1_tag_class(self);
if((length = ASN1_object_size(1, RSTRING(value)->len, tag)) <= 0)
ossl_raise(eASN1Error, NULL);
der = rb_str_new(0, length);
p = RSTRING(der)->ptr;
ASN1_put_object(&p, is_cons, RSTRING(value)->len, tag, tag_class);
memcpy(p, RSTRING(value)->ptr, RSTRING(value)->len);
p += RSTRING(value)->len;
ossl_str_adjust(der, p);
return der;
}
static VALUE
ossl_asn1_decode0(unsigned char **pp, long length, long *offset, long depth,
int once, int yield)
{
unsigned char *start, *p;
long len, off = *offset;
int hlen, tag, tc, j;
VALUE ary, asn1data, value, tag_class;
ary = rb_ary_new();
p = *pp;
while(length > 0){
start = p;
j = ASN1_get_object(&p, &len, &tag, &tc, length);
if(j & 0x80) ossl_raise(eASN1Error, NULL);
hlen = p - start;
if(yield){
VALUE arg = rb_ary_new();
rb_ary_push(arg, LONG2NUM(depth));
rb_ary_push(arg, LONG2NUM(off));
rb_ary_push(arg, LONG2NUM(hlen));
rb_ary_push(arg, LONG2NUM(len));
rb_ary_push(arg, (j & V_ASN1_CONSTRUCTED) ? Qtrue : Qfalse);
rb_ary_push(arg, ossl_asn1_class2sym(tc));
rb_ary_push(arg, INT2NUM(tag));
rb_yield(arg);
}
length -= hlen;
off += hlen;
if(len > length) ossl_raise(eASN1Error, "value is too short");
if((tc & V_ASN1_PRIVATE) == V_ASN1_PRIVATE)
tag_class = sPRIVATE;
else if((tc & V_ASN1_CONTEXT_SPECIFIC) == V_ASN1_CONTEXT_SPECIFIC)
tag_class = sCONTEXT_SPECIFIC;
else if((tc & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
tag_class = sAPPLICATION;
else
tag_class = sUNIVERSAL;
if(j & V_ASN1_CONSTRUCTED){
/* TODO: if j == 0x21 it is indefinite length object. */
if((j == 0x21) && (len == 0)){
long lastoff = off;
value = ossl_asn1_decode0(&p, length, &off, depth+1, 0, yield);
len = off - lastoff;
}
else value = ossl_asn1_decode0(&p, len, &off, depth+1, 0, yield);
}
else{
value = rb_str_new(p, len);
p += len;
off += len;
}
if(tag_class == sUNIVERSAL &&
tag < ossl_asn1_info_size && ossl_asn1_info[tag].klass){
VALUE klass = *ossl_asn1_info[tag].klass;
long flag;
if(!rb_obj_is_kind_of(value, rb_cArray)){
switch(tag){
case V_ASN1_BOOLEAN:
value = decode_bool(start, hlen+len);
break;
case V_ASN1_INTEGER:
value = decode_int(start, hlen+len);
break;
case V_ASN1_BIT_STRING:
value = decode_bstr(start, hlen+len, &flag);
break;
case V_ASN1_NULL:
value = decode_null(start, hlen+len);
break;
case V_ASN1_ENUMERATED:
value = decode_enum(start, hlen+len);
break;
case V_ASN1_OBJECT:
value = decode_obj(start, hlen+len);
break;
case V_ASN1_UTCTIME: /* FALLTHROUGH */
case V_ASN1_GENERALIZEDTIME:
value = decode_time(start, hlen+len);
break;
default:
/* use original value */
break;
}
}
asn1data = rb_funcall(klass, rb_intern("new"), 1, value);
if(tag == V_ASN1_BIT_STRING){
rb_iv_set(asn1data, "@unused_bits", LONG2NUM(flag));
}
}
else{
asn1data = rb_funcall(cASN1Data, rb_intern("new"), 3,
value, INT2NUM(tag), ID2SYM(tag_class));
}
rb_ary_push(ary, asn1data);
length -= len;
if(once) break;
}
*pp = p;
*offset = off;
return ary;
}
static VALUE
ossl_asn1_traverse(VALUE self, VALUE obj)
{
unsigned char *p;
long offset = 0;
volatile VALUE tmp;
obj = ossl_to_der_if_possible(obj);
tmp = rb_str_new4(StringValue(obj));
p = RSTRING(tmp)->ptr;
ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 0, 1);
return Qnil;
}
static VALUE
ossl_asn1_decode(VALUE self, VALUE obj)
{
VALUE ret, ary;
unsigned char *p;
long offset = 0;
volatile VALUE tmp;
obj = ossl_to_der_if_possible(obj);
tmp = rb_str_new4(StringValue(obj));
p = RSTRING(tmp)->ptr;
ary = ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 1, 0);
ret = rb_ary_entry(ary, 0);
return ret;
}
static VALUE
ossl_asn1_decode_all(VALUE self, VALUE obj)
{
VALUE ret;
unsigned char *p;
long offset = 0;
volatile VALUE tmp;
obj = ossl_to_der_if_possible(obj);
tmp = rb_str_new4(StringValue(obj));
p = RSTRING(tmp)->ptr;
ret = ossl_asn1_decode0(&p, RSTRING(tmp)->len, &offset, 0, 0, 0);
return ret;
}
static VALUE
ossl_asn1_initialize(int argc, VALUE *argv, VALUE self)
{
VALUE value, tag, tagging, tag_class;
rb_scan_args(argc, argv, "13", &value, &tag, &tagging, &tag_class);
if(argc > 1){
if(NIL_P(tag))
ossl_raise(eASN1Error, "must specify tag number");
if(NIL_P(tagging))
tagging = ID2SYM(sEXPLICIT);
if(!SYMBOL_P(tagging))
ossl_raise(eASN1Error, "invalid tag default");
if(NIL_P(tag_class))
tag_class = ID2SYM(sCONTEXT_SPECIFIC);
if(!SYMBOL_P(tag_class))
ossl_raise(eASN1Error, "invalid tag class");
if(SYM2ID(tagging) == sIMPLICIT && NUM2INT(tag) > 31)
ossl_raise(eASN1Error, "tag number for Universal too large");
}
else{
tag = INT2NUM(ossl_asn1_default_tag(self));
tagging = Qnil;
tag_class = ID2SYM(sUNIVERSAL);
}
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);
return self;
}
static int
ossl_i2d_ASN1_TYPE(ASN1_TYPE *a, unsigned char **pp)
{
#if OPENSSL_VERSION_NUMBER < 0x00907000L
if(!a) return 0;
if(a->type == V_ASN1_BOOLEAN)
return i2d_ASN1_BOOLEAN(a->value.boolean, pp);
#endif
return i2d_ASN1_TYPE(a, pp);
}
static void
ossl_ASN1_TYPE_free(ASN1_TYPE *a)
{
#if OPENSSL_VERSION_NUMBER < 0x00907000L
if(!a) return;
if(a->type == V_ASN1_BOOLEAN){
OPENSSL_free(a);
return;
}
#endif
ASN1_TYPE_free(a);
}
static VALUE
ossl_asn1prim_to_der(VALUE self)
{
ASN1_TYPE *asn1;
int tn, tc, explicit;
long length, reallen;
unsigned char *buf, *p;
VALUE str;
tn = NUM2INT(ossl_asn1_get_tag(self));
tc = ossl_asn1_tag_class(self);
explicit = ossl_asn1_is_explicit(self);
asn1 = ossl_asn1_get_asn1type(self);
length = ASN1_object_size(1, ossl_i2d_ASN1_TYPE(asn1, NULL), tn);
if(!(buf = OPENSSL_malloc(length))){
ossl_ASN1_TYPE_free(asn1);
ossl_raise(eASN1Error, "cannot alloc buffer");
}
p = buf;
if(tc == V_ASN1_UNIVERSAL) ossl_i2d_ASN1_TYPE(asn1, &p);
else{
if(explicit){
ASN1_put_object(&p, 1, ossl_i2d_ASN1_TYPE(asn1, NULL), tn, tc);
ossl_i2d_ASN1_TYPE(asn1, &p);
}
else{
ossl_i2d_ASN1_TYPE(asn1, &p);
*buf = tc | tn | (*buf & V_ASN1_CONSTRUCTED);
}
}
ossl_ASN1_TYPE_free(asn1);
reallen = p - buf;
assert(reallen <= length);
str = ossl_buf2str(buf, reallen); /* buf will be free in ossl_buf2str */
return str;
}
static VALUE
ossl_asn1cons_to_der(VALUE self)
{
int tag, tn, tc, explicit;
long seq_len, length;
unsigned char *p;
VALUE value, str;
tag = ossl_asn1_default_tag(self);
tn = NUM2INT(ossl_asn1_get_tag(self));
tc = ossl_asn1_tag_class(self);
explicit = ossl_asn1_is_explicit(self);
value = join_der(ossl_asn1_get_value(self));
seq_len = ASN1_object_size(1, RSTRING(value)->len, tag);
length = ASN1_object_size(1, seq_len, tn);
str = rb_str_new(0, length);
p = RSTRING(str)->ptr;
if(tc == V_ASN1_UNIVERSAL)
ASN1_put_object(&p, 1, RSTRING(value)->len, tn, tc);
else{
if(explicit){
ASN1_put_object(&p, 1, seq_len, tn, tc);
ASN1_put_object(&p, 1, RSTRING(value)->len, tag, V_ASN1_UNIVERSAL);
}
else ASN1_put_object(&p, 1, RSTRING(value)->len, tn, tc);
}
memcpy(p, RSTRING(value)->ptr, RSTRING(value)->len);
p += RSTRING(value)->len;
ossl_str_adjust(str, p);
return str;
}
static VALUE
ossl_asn1cons_each(VALUE self)
{
rb_ary_each(ossl_asn1_get_value(self));
return self;
}
static VALUE
ossl_asn1obj_s_register(VALUE self, VALUE oid, VALUE sn, VALUE ln)
{
StringValue(oid);
StringValue(sn);
StringValue(ln);
if(!OBJ_create(RSTRING(oid)->ptr, RSTRING(sn)->ptr, RSTRING(ln)->ptr))
ossl_raise(eASN1Error, NULL);
return Qtrue;
}
static VALUE
ossl_asn1obj_get_sn(VALUE self)
{
VALUE val, ret = Qnil;
int nid;
val = ossl_asn1_get_value(self);
if ((nid = OBJ_txt2nid(StringValuePtr(val))) != NID_undef)
ret = rb_str_new2(OBJ_nid2sn(nid));
return ret;
}
static VALUE
ossl_asn1obj_get_ln(VALUE self)
{
VALUE val, ret = Qnil;
int nid;
val = ossl_asn1_get_value(self);
if ((nid = OBJ_txt2nid(StringValuePtr(val))) != NID_undef)
ret = rb_str_new2(OBJ_nid2ln(nid));
return ret;
}
static VALUE
ossl_asn1obj_get_oid(VALUE self)
{
VALUE val;
ASN1_OBJECT *a1obj;
char buf[128];
val = ossl_asn1_get_value(self);
a1obj = obj_to_asn1obj(val);
OBJ_obj2txt(buf, sizeof(buf), a1obj, 1);
ASN1_OBJECT_free(a1obj);
return rb_str_new2(buf);
}
#define OSSL_ASN1_IMPL_FACTORY_METHOD(klass) \
static VALUE ossl_asn1_##klass(int argc, VALUE *argv, VALUE self)\
{ return rb_funcall3(cASN1##klass, rb_intern("new"), argc, argv); }
OSSL_ASN1_IMPL_FACTORY_METHOD(Boolean)
OSSL_ASN1_IMPL_FACTORY_METHOD(Integer)
OSSL_ASN1_IMPL_FACTORY_METHOD(Enumerated)
OSSL_ASN1_IMPL_FACTORY_METHOD(BitString)
OSSL_ASN1_IMPL_FACTORY_METHOD(OctetString)
OSSL_ASN1_IMPL_FACTORY_METHOD(UTF8String)
OSSL_ASN1_IMPL_FACTORY_METHOD(NumericString)
OSSL_ASN1_IMPL_FACTORY_METHOD(PrintableString)
OSSL_ASN1_IMPL_FACTORY_METHOD(T61String)
OSSL_ASN1_IMPL_FACTORY_METHOD(VideotexString)
OSSL_ASN1_IMPL_FACTORY_METHOD(IA5String)
OSSL_ASN1_IMPL_FACTORY_METHOD(GraphicString)
OSSL_ASN1_IMPL_FACTORY_METHOD(ISO64String)
OSSL_ASN1_IMPL_FACTORY_METHOD(GeneralString)
OSSL_ASN1_IMPL_FACTORY_METHOD(UniversalString)
OSSL_ASN1_IMPL_FACTORY_METHOD(BMPString)
OSSL_ASN1_IMPL_FACTORY_METHOD(Null)
OSSL_ASN1_IMPL_FACTORY_METHOD(ObjectId)
OSSL_ASN1_IMPL_FACTORY_METHOD(UTCTime)
OSSL_ASN1_IMPL_FACTORY_METHOD(GeneralizedTime)
OSSL_ASN1_IMPL_FACTORY_METHOD(Sequence)
OSSL_ASN1_IMPL_FACTORY_METHOD(Set)
void
Init_ossl_asn1()
{
VALUE ary;
int i;
sUNIVERSAL = rb_intern("UNIVERSAL");
sCONTEXT_SPECIFIC = rb_intern("CONTEXT_SPECIFIC");
sAPPLICATION = rb_intern("APPLICATION");
sPRIVATE = rb_intern("PRIVATE");
sEXPLICIT = rb_intern("EXPLICIT");
sIMPLICIT = rb_intern("IMPLICIT");
mASN1 = rb_define_module_under(mOSSL, "ASN1");
eASN1Error = rb_define_class_under(mASN1, "ASN1Error", eOSSLError);
rb_define_module_function(mASN1, "traverse", ossl_asn1_traverse, 1);
rb_define_module_function(mASN1, "decode", ossl_asn1_decode, 1);
rb_define_module_function(mASN1, "decode_all", ossl_asn1_decode_all, 1);
ary = rb_ary_new();
rb_define_const(mASN1, "UNIVERSAL_TAG_NAME", ary);
for(i = 0; i < ossl_asn1_info_size; i++){
if(ossl_asn1_info[i].name[0] == '[') continue;
rb_define_const(mASN1, ossl_asn1_info[i].name, INT2NUM(i));
rb_ary_store(ary, i, rb_str_new2(ossl_asn1_info[i].name));
}
cASN1Data = rb_define_class_under(mASN1, "ASN1Data", rb_cObject);
rb_attr(cASN1Data, rb_intern("value"), 1, 1, Qtrue);
rb_attr(cASN1Data, rb_intern("tag"), 1, 1, Qtrue);
rb_attr(cASN1Data, rb_intern("tag_class"), 1, 1, Qtrue);
rb_define_method(cASN1Data, "initialize", ossl_asn1data_initialize, 3);
rb_define_method(cASN1Data, "to_der", ossl_asn1data_to_der, 0);
cASN1Primitive = rb_define_class_under(mASN1, "Primitive", cASN1Data);
rb_attr(cASN1Primitive, rb_intern("tagging"), 1, 1, Qtrue);
rb_define_method(cASN1Primitive, "initialize", ossl_asn1_initialize, -1);
rb_define_method(cASN1Primitive, "to_der", ossl_asn1prim_to_der, 0);
cASN1Constructive = rb_define_class_under(mASN1,"Constructive", cASN1Data);
rb_include_module(cASN1Constructive, rb_mEnumerable);
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{\
cASN1##name = rb_define_class_under(mASN1, #name, cASN1##super);\
rb_define_module_function(mASN1, #name, ossl_asn1_##name, -1);\
}while(0)
OSSL_ASN1_DEFINE_CLASS(Boolean, Primitive);
OSSL_ASN1_DEFINE_CLASS(Integer, Primitive);
OSSL_ASN1_DEFINE_CLASS(Enumerated, Primitive);
OSSL_ASN1_DEFINE_CLASS(BitString, Primitive);
OSSL_ASN1_DEFINE_CLASS(OctetString, Primitive);
OSSL_ASN1_DEFINE_CLASS(UTF8String, Primitive);
OSSL_ASN1_DEFINE_CLASS(NumericString, Primitive);
OSSL_ASN1_DEFINE_CLASS(PrintableString, Primitive);
OSSL_ASN1_DEFINE_CLASS(T61String, Primitive);
OSSL_ASN1_DEFINE_CLASS(VideotexString, Primitive);
OSSL_ASN1_DEFINE_CLASS(IA5String, Primitive);
OSSL_ASN1_DEFINE_CLASS(GraphicString, Primitive);
OSSL_ASN1_DEFINE_CLASS(ISO64String, Primitive);
OSSL_ASN1_DEFINE_CLASS(GeneralString, Primitive);
OSSL_ASN1_DEFINE_CLASS(UniversalString, Primitive);
OSSL_ASN1_DEFINE_CLASS(BMPString, Primitive);
OSSL_ASN1_DEFINE_CLASS(Null, Primitive);
OSSL_ASN1_DEFINE_CLASS(ObjectId, Primitive);
OSSL_ASN1_DEFINE_CLASS(UTCTime, Primitive);
OSSL_ASN1_DEFINE_CLASS(GeneralizedTime, Primitive);
OSSL_ASN1_DEFINE_CLASS(Sequence, Constructive);
OSSL_ASN1_DEFINE_CLASS(Set, Constructive);
rb_define_singleton_method(cASN1ObjectId, "register", ossl_asn1obj_s_register, 3);
rb_define_method(cASN1ObjectId, "sn", ossl_asn1obj_get_sn, 0);
rb_define_method(cASN1ObjectId, "ln", ossl_asn1obj_get_ln, 0);
rb_define_method(cASN1ObjectId, "oid", ossl_asn1obj_get_oid, 0);
rb_define_alias(cASN1ObjectId, "short_name", "sn");
rb_define_alias(cASN1ObjectId, "long_name", "ln");
rb_attr(cASN1BitString, rb_intern("unused_bits"), 1, 1, Qtrue);
}
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