x_algor.c 分析
2016-02-29 13:53
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相关的变量定义
typedefstructX509_algor_stX509_ALGOR;
structX509_algor_st{ASN1_OBJECT*algorithm;
ASN1_TYPE*parameter;
}/*X509_ALGOR*/;[/code]x_algor.c中的宏展开
ASN1_SEQUENCE(X509_ALGOR)={ASN1_SIMPLE(X509_ALGOR,algorithm,ASN1_OBJECT),
ASN1_OPT(X509_ALGOR,parameter,ASN1_ANY)
}定义了如下全局变量：
staticconstASN1_TEMPLATEX509_ALGOR_seq_tt[]={{(0),(0),__builtin_offsetof(X509_ALGOR,algorithm),"algorithm",(&(ASN1_OBJECT_it))},{((0x1)),(0),__builtin_offsetof(X509_ALGOR,parameter),"parameter",(&(ASN1_ANY_it))}};
ASN1_SEQUENCE_END(X509_ALGOR)定义了如下全局变量：
constASN1_ITEMX509_ALGOR_it=
{0x1,16,
X509_ALGOR_seq_tt,
sizeof(X509_ALGOR_seq_tt)/sizeof(ASN1_TEMPLATE),
((void*)0),
sizeof(X509_ALGOR),
"X509_ALGOR"};
ASN1_ITEM_TEMPLATE(X509_ALGORS)=
ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF,0,algorithms,X509_ALGOR)
定义了如下全局变量：
staticconstASN1_TEMPLATEX509_ALGORS_item_tt=
{((0x2<<1)),(0),0,"algorithms",(&(X509_ALGOR_it))};ASN1_ITEM_TEMPLATE_END(X509_ALGORS)定义了如下全局变量：
constASN1_ITEMX509_ALGORS_it={0x0,-1,&X509_ALGORS_item_tt,0,((void*)0),0,"X509_ALGORS"};[/code]可以看出，主要有两种类型的全局变量：ASN1_TEMPLATE和ASN1_ITEM。两个结构体的定义如下：typedefstructASN1_ITEM_stASN1_ITEM;
typedefconstASN1_ITEMASN1_ITEM_EXP;
typedefstructASN1_TEMPLATE_st{unsignedlongflags;//Variousflags
longtag;//tag,notusedifnotagging
unsignedlongoffset;//本例中，ASN1_TEMPLATE中定义的某类型结构中某个参数的偏移值，比如X509_ALGOR中algorithm的偏移
constchar*field_name;//参数名字
ASN1_ITEM_EXP*item;//本参数指定的ASN1_ITEM全局变量指针，定义中tasn_type.c中RelevantASN1_ITEMorASN1_ADB
}ASN1_TEMPLATE;
structASN1_ITEM_st{charitype;//Theitemtype,primitive,SEQUENCE,CHOICEorextern
longutype;//underlyingtype,ASN1_ITEM的类型，比如SEQUENCE是16，未定义的-1
constASN1_TEMPLATE*templates;//指明的ASN1_TEMPLATE;IfSEQUENCEorCHOICEthiscontainsthecontents
longtcount;//ASN1_TEMPLATE模板数组中模板的个数NumberoftemplatesifSEQUENCEorCHOICE
constvoid*funcs;//functionsthathandlethistype
longsize;//该ASN1_ITEM实际结构体的大小，此例中为X509_ALGORStructuresize(usually)
constchar*sname;//该ASN1_ITEM的名字，此例中为"X509_ALGOR"
};[/code]
IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)定义了多个函数
X509_ALGOR*d2i_X509_ALGOR(X509_ALGOR**a,constunsignedchar**in,longlen)
{return(X509_ALGOR*)ASN1_item_d2i((ASN1_VALUE**)a,in,len,(&(X509_ALGOR_it)));
}
inti2d_X509_ALGOR(X509_ALGOR*a,unsignedchar**out)
{returnASN1_item_i2d((ASN1_VALUE*)a,out,(&(X509_ALGOR_it)));
}
X509_ALGOR*X509_ALGOR_new(void)
{return(X509_ALGOR*)ASN1_item_new((&(X509_ALGOR_it)));
}
voidX509_ALGOR_free(X509_ALGOR*a)
{ASN1_item_free((ASN1_VALUE*)a,(&(X509_ALGOR_it)));
}
IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS,X509_ALGORS,X509_ALGORS)定义了两个函数
X509_ALGORS*d2i_X509_ALGORS(X509_ALGORS**a,constunsignedchar**in,longlen)
{return(X509_ALGORS*)ASN1_item_d2i((ASN1_VALUE**)a,in,len,(&(X509_ALGORS_it)));
}
inti2d_X509_ALGORS(X509_ALGORS*a,unsignedchar**out)
{returnASN1_item_i2d((ASN1_VALUE*)a,out,(&(X509_ALGORS_it)));
}
IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)定义了一个函数
X509_ALGOR*X509_ALGOR_dup(X509_ALGOR*x)
{returnASN1_item_dup((&(X509_ALGOR_it)),x);
}[/code]下面是一个例子，根据例子通过GDB来具体跟踪一下这几个函数。例子如下：
#include<string.h>
#include<openssl/x509.h>
intmain()
{FILE*fp;
char*buf,*p;
chardata[]={"12345678"},read[1024];intlen;
X509_ALGOR*alg=NULL,*alg2=NULL,*alg3=NULL;
/*new函数*/
alg=X509_ALGOR_new();
/*构造内容*/
alg->algorithm=OBJ_nid2obj(NID_sha256);
alg->parameter=ASN1_TYPE_new();
ASN1_TYPE_set_octetstring(alg->parameter,data,strlen(data));
/*i2d函数*/
len=i2d_X509_ALGOR(alg,NULL);
p=buf=malloc(len);
len=i2d_X509_ALGOR(alg,(unsignedchar**)&p);
/*写入文件*/
fp=fopen("alg.cer","wb");fwrite(buf,1,len,fp);
fclose(fp);
/*读文件*/
fp=fopen("alg.cer","rb");len=fread(read,1,1024,fp);
fclose(fp);
p=read;
/*d2i函数*/
d2i_X509_ALGOR(&alg2,(constunsignedchar**)&p,len);
if(alg2==NULL)
{printf("err\n");}
/*dup函数*/
alg3=X509_ALGOR_dup(alg);
/*free函数*/
X509_ALGOR_free(alg);
if(alg2)
X509_ALGOR_free(alg2);
X509_ALGOR_free(alg3);
free(buf);
return0;
}[/code]X509_ALGOR_new：创建一个X509_ALGOR，返回X509_ALGOR类型的对象-->ASN1_VALUE*ASN1_item_new(constASN1_ITEM*it)：注意，这里返回的是ASN1_VALUE*，入参是ANS1_ITEM*ASN1_VALUE的定义中asn1.h中：typedefstructASN1_VALUE_stASN1_VALUE;实际找这个ASN_VALUE_st是找不到的，可以看定义处源码上的注释，这里实际是C语言的一种特殊用法（canonymousstruct），源码中使用此类型都是强转为其他类型的，这里这个类型就相当于void*。入参是一个ASN1_ITEM类型，可以看到这里传进来的是X509_ALGOR_it；-->ASN1_item_ex_new-->asn1_item_ex_combine_new(ASN1_VALUE**pval,constASN1_ITEM*it,intcombine)//这里入参1是需要返回的创建对象；入参2是X509_ALGOR_it；入参3是0具体的栈信息如下：
12 alg=X509_ALGOR_new();
(gdb)s
X509_ALGOR_new()atx_algor.c:74
74 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
(gdb)s
ASN1_item_new(it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_new.c:75
75 ASN1_VALUE*ret=NULL;
(gdb)n
76 if(ASN1_item_ex_new(&ret,it)>0)
(gdb)s
ASN1_item_ex_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_new.c:85
85 returnasn1_item_ex_combine_new(pval,it,0);
(gdb)s
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:91
91 constASN1_TEMPLATE*tt=NULL;
(gdb)n
94 constASN1_AUX*aux=it->funcs;
(gdb)
98 if(aux&&aux->asn1_cb)
(gdb)
101 asn1_cb=0;
(gdb)
104 if(it->sname)
(gdb)n
105 CRYPTO_push_info(it->sname);
(gdb)s
CRYPTO_push_info_(info=0x7ffff7b73655"X509_ALGOR",file=0x7ffff7b7408c"tasn_new.c",line=105)atmem_dbg.c:392
392 intret=0;
(gdb)n
394 if(is_MemCheck_on()){(gdb)
432 return(ret);
(gdb)n
433 }
(gdb)
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:108
108 switch(it->itype){(gdb)
166 if(asn1_cb){(gdb)
178 if(!combine){(gdb)p*it
$1={itype=1'\001',utype=16,templates=0x7ffff7dc58a0<X509_ALGOR_seq_tt>,tcount=2,funcs=0x0,size=16,sname=0x7ffff7b73655"X509_ALGOR"}(gdb)n
179 *pval=OPENSSL_malloc(it->size);
(gdb)n
180 if(!*pval)
(gdb)n
182 memset(*pval,0,it->size);
(gdb)pit->size
$2=16
(gdb)n
183 asn1_do_lock(pval,0,it);
(gdb)s
asn1_do_lock(pval=0x7fffffffdfa8,op=0,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:107
107 if((it->itype!=ASN1_ITYPE_SEQUENCE)
(gdb)n
110 aux=it->funcs;
(gdb)n
111 if(!aux||!(aux->flags&ASN1_AFLG_REFCOUNT))
(gdb)paux
$3=(constASN1_AUX*)0x0
(gdb)n
112 return0;
(gdb)n
127 }
(gdb)n
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:184
184 asn1_enc_init(pval,it);
(gdb)s
asn1_enc_init(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:143
143 enc=asn1_get_enc_ptr(pval,it);
(gdb)s
asn1_get_enc_ptr(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:132
132 if(!pval||!*pval)
(gdb)n
134 aux=it->funcs;
(gdb)n
135 if(!aux||!(aux->flags&ASN1_AFLG_ENCODING))
(gdb)n
136 returnNULL;
(gdb)n
138 }
(gdb)n
asn1_enc_init(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:144
144 if(enc){(gdb)n
149 }
(gdb)n
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:186
186 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)n
187 pseqval=asn1_get_field_ptr(pval,tt);
(gdb)s
asn1_get_field_ptr(pval=0x7fffffffdfa8,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>)attasn_utl.c:204
204 if(tt->flags&ASN1_TFLG_COMBINE)
(gdb)n
206 pvaltmp=offset2ptr(*pval,tt->offset);
(gdb)ppval
$4=(ASN1_VALUE**)0x7fffffffdfa8
(gdb)n
211 returnpvaltmp;
(gdb)ppvaltmp
$5=(ASN1_VALUE**)0x603010
(gdb)p*pval
$6=(ASN1_VALUE*)0x603010
(gdb)ptt->offset
$7=0
(gdb)n
212 }
(gdb)n
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:188
188 if(!ASN1_template_new(pseqval,tt))
(gdb)s
ASN1_template_new(pval=0x603010,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>)attasn_new.c:256
256 constASN1_ITEM*it=ASN1_ITEM_ptr(tt->item);
(gdb)p*tt
$8={flags=0,tag=0,offset=0,field_name=0x7ffff7b73641"algorithm",item=0x7ffff7dbf740<ASN1_OBJECT_it>}(gdb)ptt->item
$9=(ASN1_ITEM_EXP*)0x7ffff7dbf740<ASN1_OBJECT_it>
(gdb)p*tt->item
$10={itype=0'\000',utype=6,templates=0x0,tcount=0,funcs=0x0,size=0,sname=0x7ffff7b742c9"ASN1_OBJECT"}(gdb)n
258 if(tt->flags&ASN1_TFLG_OPTIONAL){(gdb)n
264 if(tt->flags&ASN1_TFLG_ADB_MASK){(gdb)n
269 if(tt->field_name)
(gdb)n
270 CRYPTO_push_info(tt->field_name);
(gdb)
273 if(tt->flags&ASN1_TFLG_SK_MASK){(gdb)
286 ret=asn1_item_ex_combine_new(pval,it,tt->flags&ASN1_TFLG_COMBINE);
(gdb)s
asn1_item_ex_combine_new(pval=0x603010,it=0x7ffff7dbf740<ASN1_OBJECT_it>,combine=0)attasn_new.c:91
91 constASN1_TEMPLATE*tt=NULL;
(gdb)n
94 constASN1_AUX*aux=it->funcs;
(gdb)n
98 if(aux&&aux->asn1_cb)
(gdb)
101 asn1_cb=0;
(gdb)
104 if(it->sname)
(gdb)
105 CRYPTO_push_info(it->sname);
(gdb)
108 switch(it->itype){(gdb)
128 if(it->templates){(gdb)p*it
$11={itype=0'\000',utype=6,templates=0x0,tcount=0,funcs=0x0,size=0,sname=0x7ffff7b742c9"ASN1_OBJECT"}(gdb)n
131 }elseif(!ASN1_primitive_new(pval,it))
(gdb)s
ASN1_primitive_new(pval=0x603010,it=0x7ffff7dbf740<ASN1_OBJECT_it>)attasn_new.c:315
315 if(!it)
(gdb)n
318 if(it->funcs){(gdb)
324 if(it->itype==ASN1_ITYPE_MSTRING)
(gdb)
327 utype=it->utype;
(gdb)n
328 switch(utype){(gdb)n
330 *pval=(ASN1_VALUE*)OBJ_nid2obj(NID_undef);
(gdb)s
OBJ_nid2obj(n=0)atobj_dat.c:318
318 if((n>=0)&&(n<NUM_NID)){(gdb)n
319 if((n!=NID_undef)&&(nid_objs[n].nid==NID_undef)){(gdb)n
323 return((ASN1_OBJECT*)&(nid_objs[n]));
(gdb)n
338 }
(gdb)n
ASN1_primitive_new(pval=0x603010,it=0x7ffff7dbf740<ASN1_OBJECT_it>)attasn_new.c:331
331 return1;
(gdb)n
360 }
(gdb)
asn1_item_ex_combine_new(pval=0x603010,it=0x7ffff7dbf740<ASN1_OBJECT_it>,combine=0)attasn_new.c:133
133 break;
(gdb)
196 if(it->sname)
(gdb)
197 CRYPTO_pop_info();
(gdb)
199 return1;
(gdb)
218 }
(gdb)
ASN1_template_new(pval=0x603010,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>)attasn_new.c:289
289 if(it->sname)
(gdb)
290 CRYPTO_pop_info();
(gdb)
292 returnret;
(gdb)
293 }
(gdb)
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:186
186 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)
187 pseqval=asn1_get_field_ptr(pval,tt);
(gdb)
188 if(!ASN1_template_new(pseqval,tt))
(gdb)s
ASN1_template_new(pval=0x603018,tt=0x7ffff7dc58c8<X509_ALGOR_seq_tt+40>)attasn_new.c:256
256 constASN1_ITEM*it=ASN1_ITEM_ptr(tt->item);
(gdb)n
258 if(tt->flags&ASN1_TFLG_OPTIONAL){(gdb)
259 asn1_template_clear(pval,tt);
(gdb)s
asn1_template_clear(pval=0x603018,tt=0x7ffff7dc58c8<X509_ALGOR_seq_tt+40>)attasn_new.c:298
298 if(tt->flags&(ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
(gdb)n
301 asn1_item_clear(pval,ASN1_ITEM_ptr(tt->item));
(gdb)s
asn1_item_clear(pval=0x603018,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:224
224 switch(it->itype){(gdb)n
235 if(it->templates)
(gdb)
238 asn1_primitive_clear(pval,it);
(gdb)p*it
$12={itype=0'\000',utype=-4,templates=0x0,tcount=0,funcs=0x0,size=0,sname=0x7ffff7b74384"ASN1_ANY"}(gdb)s
asn1_primitive_clear(pval=0x603018,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:365
365 if(it&&it->funcs){(gdb)n
373 if(!it||(it->itype==ASN1_ITYPE_MSTRING))
(gdb)n
376 utype=it->utype;
(gdb)
377 if(utype==V_ASN1_BOOLEAN)
(gdb)putype
$13=-4
(gdb)n
380 *pval=NULL;
(gdb)
381 }
(gdb)
asn1_item_clear(pval=0x603018,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:239
239 break;
(gdb)
252 }
(gdb)
asn1_template_clear(pval=0x603018,tt=0x7ffff7dc58c8<X509_ALGOR_seq_tt+40>)attasn_new.c:302
302 }
(gdb)n
ASN1_template_new(pval=0x603018,tt=0x7ffff7dc58c8<X509_ALGOR_seq_tt+40>)attasn_new.c:260
260 return1;
(gdb)n
293 }
(gdb)n
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_new.c:186
186 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)n
191 if(asn1_cb&&!asn1_cb(ASN1_OP_NEW_POST,pval,it,NULL))
(gdb)ppseqval
$14=(ASN1_VALUE**)0x603018
(gdb)ppval
$15=(ASN1_VALUE**)0x7fffffffdfa8
(gdb)p*pval
$16=(ASN1_VALUE*)0x603010
(gdb)pasn1_cb
$17=(ASN1_aux_cb*)0x0
(gdb)n
193 break;
(gdb)p*(X509_ALGOR*)pval
$18={algorithm=0x603010,parameter=0x7fffffffdfc0}(gdb)p*(X509_ALGOR*)pval->parameter
Thereisnomembernamedparameter.
(gdb)p*((X509_ALGOR*)pval)->parameter)
Junkafterendofexpression.
(gdb)p*(((X509_ALGOR*)pval)->parameter)
$19={type=-7136,value={ptr=0x400b0d<main+61>"H\211E\370\277\240\002",boolean=4197133,asn1_string=0x400b0d<main+61>,object=0x400b0d<main+61>,integer=0x400b0d<main+61>,enumerated=0x400b0d<main+61>,bit_string=0x400b0d<main+61>,octet_string=0x400b0d<main+61>,printablestring=0x400b0d<main+61>,
t61string=0x400b0d<main+61>,ia5string=0x400b0d<main+61>,generalstring=0x400b0d<main+61>,bmpstring=0x400b0d<main+61>,universalstring=0x400b0d<main+61>,
utctime=0x400b0d<main+61>,generalizedtime=0x400b0d<main+61>,visiblestring=0x400b0d<main+61>,utf8string=0x400b0d<main+61>,set=0x400b0d<main+61>,
sequence=0x400b0d<main+61>,asn1_value=0x400b0d<main+61>}}
(gdb)n
196 if(it->sname)
(gdb)n
197 CRYPTO_pop_info();
(gdb)n
199 return1;
(gdb)n
218 }
(gdb)n
ASN1_item_ex_new(pval=0x7fffffffdfa8,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_new.c:86
86 }
(gdb)n
ASN1_item_new(it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_new.c:77
77 returnret;
(gdb)n
79 }
(gdb)n
main()atopenssl_x_algor_test.c:14
14 alg->algorithm=OBJ_nid2obj(NID_sha256);
(gdb)s
OBJ_nid2obj(n=672)atobj_dat.c:318
318 if((n>=0)&&(n<NUM_NID)){(gdb)n
319 if((n!=NID_undef)&&(nid_objs[n].nid==NID_undef)){(gdb)n
323 return((ASN1_OBJECT*)&(nid_objs[n]));
(gdb)n
338 }
(gdb)n
main()atopenssl_x_algor_test.c:15
15 alg->parameter=ASN1_TYPE_new();
(gdb)palg->parameter
$20=(ASN1_TYPE*)0x0
(gdb)p*alg
$21={algorithm=0x7ffff7db7d40<nid_objs+26880>,parameter=0x0}(gdb)p*alg->algorithm
$22={sn=0x7ffff7b3263f"SHA256",ln=0x7ffff7b32646"sha256",nid=672,length=9,data=0x7ffff7b2e7dc<lvalues+4540>"`\206H\001e\003\004\002\001`\206H\001e\003\004\002\002`\206H\001e\003\004\002\003`\206H\001e\003\004\002\004++\201\004g+g+\001*\206H\316=\001\002\003*\206H\316=\001\002\003\001*\206H\316=\001\002\003\002*\206H\316=\001\002\003\003*\206H\316=\003",flags=0}
(gdb)s
ASN1_TYPE_new()attasn_typ.c:118
118 IMPLEMENT_ASN1_FUNCTIONS_fname(ASN1_TYPE,ASN1_ANY,ASN1_TYPE)
(gdb)s
ASN1_item_new(it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:75
75 ASN1_VALUE*ret=NULL;
(gdb)n
76 if(ASN1_item_ex_new(&ret,it)>0)
(gdb)s
ASN1_item_ex_new(pval=0x7fffffffdfa8,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:85
85 returnasn1_item_ex_combine_new(pval,it,0);
(gdb)s
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbfa00<ASN1_ANY_it>,combine=0)attasn_new.c:91
91 constASN1_TEMPLATE*tt=NULL;
(gdb)n
94 constASN1_AUX*aux=it->funcs;
(gdb)n
98 if(aux&&aux->asn1_cb)
(gdb)
101 asn1_cb=0;
(gdb)
104 if(it->sname)
(gdb)
105 CRYPTO_push_info(it->sname);
(gdb)
108 switch(it->itype){(gdb)
128 if(it->templates){(gdb)
131 }elseif(!ASN1_primitive_new(pval,it))
(gdb)s
ASN1_primitive_new(pval=0x7fffffffdfa8,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:315
315 if(!it)
(gdb)p*it
$23={itype=0'\000',utype=-4,templates=0x0,tcount=0,funcs=0x0,size=0,sname=0x7ffff7b74384"ASN1_ANY"}(gdb)n
318 if(it->funcs){(gdb)
324 if(it->itype==ASN1_ITYPE_MSTRING)
(gdb)
327 utype=it->utype;
(gdb)
328 switch(utype){(gdb)
342 typ=OPENSSL_malloc(sizeof(ASN1_TYPE));
(gdb)putype
$24=-4
(gdb)n
343 if(!typ)
(gdb)n
345 typ->value.ptr=NULL;
(gdb)n
346 typ->type=-1;
(gdb)n
347 *pval=(ASN1_VALUE*)typ;
(gdb)
348 break;
(gdb)
357 if(*pval)
(gdb)
358 return1;
(gdb)
360 }
(gdb)
asn1_item_ex_combine_new(pval=0x7fffffffdfa8,it=0x7ffff7dbfa00<ASN1_ANY_it>,combine=0)attasn_new.c:133
133 break;
(gdb)
196 if(it->sname)
(gdb)
197 CRYPTO_pop_info();
(gdb)
199 return1;
(gdb)
218 }
(gdb)
ASN1_item_ex_new(pval=0x7fffffffdfa8,it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:86
86 }
(gdb)
ASN1_item_new(it=0x7ffff7dbfa00<ASN1_ANY_it>)attasn_new.c:77
77 returnret;
(gdb)
79 }
(gdb)
main()atopenssl_x_algor_test.c:16
16 ASN1_TYPE_set_octetstring(alg->parameter,data,strlen(data));
(gdb)s
ASN1_TYPE_set_octetstring(a=0x603030,data=0x7fffffffe3e0"12345678",len=8)atevp_asn1.c:68
68 if((os=M_ASN1_OCTET_STRING_new())==NULL)
(gdb)s
ASN1_STRING_type_new(type=4)atasn1_lib.c:412
412 ret=(ASN1_STRING*)OPENSSL_malloc(sizeof(ASN1_STRING));
(gdb)n
413 if(ret==NULL){(gdb)
417 ret->length=0;
(gdb)p*ret
$25={length=0,type=0,data=0x0,flags=0}(gdb)n
418 ret->type=type;
(gdb)
419 ret->data=NULL;
(gdb)n
420 ret->flags=0;
(gdb)
421 return(ret);
(gdb)
422 }
(gdb)
ASN1_TYPE_set_octetstring(a=0x603030,data=0x7fffffffe3e0"12345678",len=8)atevp_asn1.c:70
70 if(!M_ASN1_OCTET_STRING_set(os,data,len)){(gdb)s
ASN1_STRING_set(str=0x603050,_data=0x7fffffffe3e0,len=8)atasn1_lib.c:365
365 constchar*data=_data;
(gdb)
367 if(len<0){(gdb)
373 if((str->length<len)||(str->data==NULL)){(gdb)
374 c=str->data;
(gdb)
375 if(c==NULL)
(gdb)
376 str->data=OPENSSL_malloc(len+1);
(gdb)p*str
$26={length=0,type=4,data=0x0,flags=0}(gdb)n
380 if(str->data==NULL){(gdb)n
386 str->length=len;
(gdb)n
387 if(data!=NULL){(gdb)n
388 memcpy(str->data,data,len);
(gdb)n
390 str->data[len]='\0';
(gdb)n
392 return(1);
(gdb)n
393 }
(gdb)n
ASN1_TYPE_set_octetstring(a=0x603030,data=0x7fffffffe3e0"12345678",len=8)atevp_asn1.c:74
74 ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
(gdb)s
ASN1_TYPE_set(a=0x603030,type=4,value=0x603050)ata_type.c:74
74 if(a->value.ptr!=NULL){(gdb)n
78 a->type=type;
(gdb)nn
Undefinedcommand:"nn".Try"help".
(gdb)n
79 if(type==V_ASN1_BOOLEAN)
(gdb)n
82 a->value.ptr=value;
(gdb)n
83 }
(gdb)n
ASN1_TYPE_set_octetstring(a=0x603030,data=0x7fffffffe3e0"12345678",len=8)atevp_asn1.c:75
75 return(1);
(gdb)n
76 }
(gdb)n
main()atopenssl_x_algor_test.c:18
18 len=i2d_X509_ALGOR(alg,NULL);
(gdb)s
i2d_X509_ALGOR(a=0x603010,out=0x0)atx_algor.c:74
74 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
(gdb)s
ASN1_item_i2d(val=0x603010,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_enc.c:90
90 returnasn1_item_flags_i2d(val,out,it,0);
(gdb)s
asn1_item_flags_i2d(val=0x603010,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,flags=0)attasn_enc.c:103
103 if(out&&!*out){(gdb)n
118 returnASN1_item_ex_i2d(&val,out,it,-1,flags);
(gdb)s
ASN1_item_ex_i2d(pval=0x7fffffffdf48,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,tag=-1,aclass=0)attasn_enc.c:129
129 constASN1_TEMPLATE*tt=NULL;
(gdb)n
130 unsignedchar*p=NULL;
(gdb)n
131 inti,seqcontlen,seqlen,ndef=1;
(gdb)
134 constASN1_AUX*aux=it->funcs;
(gdb)
135 ASN1_aux_cb*asn1_cb=0;
(gdb)
137 if((it->itype!=ASN1_ITYPE_PRIMITIVE)&&!*pval)
(gdb)n
140 if(aux&&aux->asn1_cb)
(gdb)n
143 switch(it->itype){(gdb)n
197 i=asn1_enc_restore(&seqcontlen,out,pval,it);
(gdb)pit->itype
$27=1'\001'
(gdb)p*pval
$28=(ASN1_VALUE*)0x603010
(gdb)s
asn1_enc_restore(len=0x7fffffffdeac,out=0x0,pval=0x7fffffffdf48,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:188
188 enc=asn1_get_enc_ptr(pval,it);
(gdb)s
asn1_get_enc_ptr(pval=0x7fffffffdf48,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:132
132 if(!pval||!*pval)
(gdb)n
134 aux=it->funcs;
(gdb)n
135 if(!aux||!(aux->flags&ASN1_AFLG_ENCODING))
(gdb)
136 returnNULL;
(gdb)
138 }
(gdb)
asn1_enc_restore(len=0x7fffffffdeac,out=0x0,pval=0x7fffffffdf48,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:189
189 if(!enc||enc->modified)
(gdb)penc
$29=(ASN1_ENCODING*)0x0
(gdb)n
190 return0;
(gdb)n
198 }
(gdb)n
ASN1_item_ex_i2d(pval=0x7fffffffdf48,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,tag=-1,aclass=0)attasn_enc.c:199
199 if(i<0)
(gdb)n
202 if(i>0)
(gdb)n
205 seqcontlen=0;
(gdb)n
207 if(tag==-1){(gdb)ptag
$30=-1
(gdb)n
208 tag=V_ASN1_SEQUENCE;
(gdb)ptag
$31=-1
(gdb)n
210 aclass=(aclass&~ASN1_TFLG_TAG_CLASS)
(gdb)n
213 if(asn1_cb&&!asn1_cb(ASN1_OP_I2D_PRE,pval,it,NULL))
(gdb)ptag
$32=16
(gdb)paclass
$33=0
(gdb)p/xtag
$34=0x10
(gdb)pasn1_cb
$35=(ASN1_aux_cb*)0x0
(gdb)n
216 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)n
219 seqtt=asn1_do_adb(pval,tt,1);
(gdb)s
asn1_do_adb(pval=0x7fffffffdf48,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>,nullerr=1)attasn_utl.c:227
227 if(!(tt->flags&ASN1_TFLG_ADB_MASK))
(gdb)n
228 returntt;
(gdb)n
275 }
(gdb)n
ASN1_item_ex_i2d(pval=0x7fffffffdf48,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,tag=16,aclass=0)attasn_enc.c:220
220 if(!seqtt)
(gdb)n
222 pseqval=asn1_get_field_ptr(pval,seqtt);
(gdb)pseqtt
$36=(constASN1_TEMPLATE*)0x7ffff7dc58a0<X509_ALGOR_seq_tt>
(gdb)n
224 seqcontlen+=asn1_template_ex_i2d(pseqval,NULL,seqtt,
(gdb)s
asn1_template_ex_i2d(pval=0x603010,out=0x0,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>,tag=-1,iclass=0)attasn_enc.c:266
266 flags=tt->flags;
(gdb)n
274 if(flags&ASN1_TFLG_TAG_MASK){(gdb)n
282 }elseif(tag!=-1){(gdb)
287 ttag=-1;
(gdb)
288 tclass=0;
(gdb)
293 iclass&=~ASN1_TFLG_TAG_CLASS;
(gdb)
301 if((flags&ASN1_TFLG_NDEF)&&(iclass&ASN1_TFLG_NDEF))
(gdb)
304 ndef=1;
(gdb)
306 if(flags&ASN1_TFLG_SK_MASK){(gdb)
375 if(flags&ASN1_TFLG_EXPTAG){(gdb)
394 returnASN1_item_ex_i2d(pval,out,ASN1_ITEM_ptr(tt->item),
(gdb)s
ASN1_item_ex_i2d(pval=0x603010,out=0x0,it=0x7ffff7dbf740<ASN1_OBJECT_it>,tag=-1,aclass=0)attasn_enc.c:129
129 constASN1_TEMPLATE*tt=NULL;
(gdb)n
130 unsignedchar*p=NULL;
(gdb)
131 inti,seqcontlen,seqlen,ndef=1;
(gdb)
134 constASN1_AUX*aux=it->funcs;
(gdb)
135 ASN1_aux_cb*asn1_cb=0;
(gdb)
137 if((it->itype!=ASN1_ITYPE_PRIMITIVE)&&!*pval)
(gdb)
140 if(aux&&aux->asn1_cb)
(gdb)
143 switch(it->itype){(gdb)
146 if(it->templates)
(gdb)
149 returnasn1_i2d_ex_primitive(pval,out,it,tag,aclass);
(gdb)
254 }
(gdb)
asn1_template_ex_i2d(pval=0x603010,out=0x0,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>,tag=-1,iclass=0)attasn_enc.c:397
397 }
(gdb)
ASN1_item_ex_i2d(pval=0x7fffffffdf48,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,tag=16,aclass=0)attasn_enc.c:216
216 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)
219 seqtt=asn1_do_adb(pval,tt,1);
(gdb)
220 if(!seqtt)
(gdb)
222 pseqval=asn1_get_field_ptr(pval,seqtt);
(gdb)
224 seqcontlen+=asn1_template_ex_i2d(pseqval,NULL,seqtt,
(gdb)
216 for(i=0,tt=it->templates;i<it->tcount;tt++,i++){(gdb)
228 seqlen=ASN1_object_size(ndef,seqcontlen,tag);
(gdb)
229 if(!out)
(gdb)
230 returnseqlen;
(gdb)
254 }
(gdb)pseqlen
$37=23
(gdb)n
asn1_item_flags_i2d(val=0x603010,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>,flags=0)attasn_enc.c:119
119 }
(gdb)
ASN1_item_i2d(val=0x603010,out=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_enc.c:91
91 }
(gdb)
main()atopenssl_x_algor_test.c:19
19 p=buf=malloc(len);
(gdb)n
20 len=i2d_X509_ALGOR(alg,(unsignedchar**)&p);
(gdb)n
22 fp=fopen("alg.cer","wb");(gdb)pp
$38=0x6030a7""
(gdb)pbuf
$39=0x603090"0\025\006\t`\206H\001e\003\004\002\001\004\b12345678"
(gdb)x/23bbuf
0x603090: 0x30 0x15 0x06 0x09 0x60 0x86 0x48 0x01
0x603098: 0x65 0x03 0x04 0x02 0x01 0x04 0x08 0x31
0x6030a0: 0x32 0x33 0x34 0x35 0x36 0x37 0x38
(gdb)n
23 fwrite(buf,1,len,fp);
(gdb)n
24 fclose(fp);
(gdb)n
26 fp=fopen("alg.cer","rb");(gdb)n
27 len=fread(read,1,1024,fp);
(gdb)n
28 fclose(fp);
(gdb)plen
$40=23
(gdb)pread
$41="0\025\006\t`\206H\001e\003\004\002\001\004\b12345678\000\257O\336\367\377\177\000\000\000\000\000\000\000\000\000\000\030\237\376\367\377\177\000\000\000\220\376\367\377\177\000\000t\267\335\367\377\177\000\000\bMZ\367\377\177\000\000\264\335\367\377\177\000\000\000\000\000\000\001\000\000\000\236\b\000\000\001\000\000\000\003\000\000\000\000\000\000\000`\342\377\377\377\177\000\000\240\341\377\377\377\177\000\000\001\000\000\000\000\000\000\000\030\237\376\367\377\177\000\000`\345\377\367\377\177\000\000\230\331\377\367\377\177\000\000\257O\336\367\377\177\000\000\000\000\000\000\000\000\000\000\030\237\376\367\377\177\000\000\001\000\000\000\377\177\000\000\000\000\000\000\000\000\000\000\001\000\000\000\377\177\000\000"...
(gdb)x/23bread
0x7fffffffdfe0: 0x30 0x15 0x06 0x09 0x60 0x86 0x48 0x01
0x7fffffffdfe8: 0x65 0x03 0x04 0x02 0x01 0x04 0x08 0x31
0x7fffffffdff0: 0x32 0x33 0x34 0x35 0x36 0x37 0x38
(gdb)n
29 p=read;
(gdb)n
31 d2i_X509_ALGOR(&alg2,(constunsignedchar**)&p,len);
(gdb)n
32 if(alg2==NULL)
(gdb)p*alg2
$42={algorithm=0x6030d0,parameter=0x603120}(gdb)n
37 alg3=X509_ALGOR_dup(alg);
(gdb)p*alg->algorithm
$43={sn=0x7ffff7b3263f"SHA256",ln=0x7ffff7b32646"sha256",nid=672,length=9,data=0x7ffff7b2e7dc<lvalues+4540>"`\206H\001e\003\004\002\001`\206H\001e\003\004\002\002`\206H\001e\003\004\002\003`\206H\001e\003\004\002\004++\201\004g+g+\001*\206H\316=\001\002\003*\206H\316=\001\002\003\001*\206H\316=\001\002\003\002*\206H\316=\001\002\003\003*\206H\316=\003",flags=0}
(gdb)p*alg->parameter
$44={type=4,value={ptr=0x603050"\b",boolean=6303824,asn1_string=0x603050,object=0x603050,integer=0x603050,enumerated=0x603050,bit_string=0x603050,octet_string=0x603050,printablestring=0x603050,t61string=0x603050,ia5string=0x603050,generalstring=0x603050,bmpstring=0x603050,universalstring=0x603050,
utctime=0x603050,generalizedtime=0x603050,visiblestring=0x603050,utf8string=0x603050,set=0x603050,sequence=0x603050,asn1_value=0x603050}}
(gdb)n
39 X509_ALGOR_free(alg);
(gdb)palg3
$45=(X509_ALGOR*)0x6031a0
(gdb)p*alg3
$46={algorithm=0x6031c0,parameter=0x603210}(gdb)p*alg3->algorithm
$47={sn=0x0,ln=0x0,nid=0,length=9,data=0x6031f0"`\206H\001e\003\004\002\001",flags=9}(gdb)p*alg3->parameter
$48={type=4,value={ptr=0x603230"\b",boolean=6304304,asn1_string=0x603230,object=0x603230,integer=0x603230,enumerated=0x603230,bit_string=0x603230,octet_string=0x603230,printablestring=0x603230,t61string=0x603230,ia5string=0x603230,generalstring=0x603230,bmpstring=0x603230,universalstring=0x603230,
utctime=0x603230,generalizedtime=0x603230,visiblestring=0x603230,utf8string=0x603230,set=0x603230,sequence=0x603230,asn1_value=0x603230}}
(gdb)n
40 if(alg2)
(gdb)n
41 X509_ALGOR_free(alg2);
(gdb)s
X509_ALGOR_free(a=0x6030b0)atx_algor.c:74
74 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
(gdb)s
ASN1_item_free(val=0x6030b0,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_fre.c:72
72 asn1_item_combine_free(&val,it,0);
(gdb)s
asn1_item_combine_free(pval=0x7fffffffdf98,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_fre.c:83
83 constASN1_TEMPLATE*tt=NULL,*seqtt;
(gdb)n
86 constASN1_AUX*aux=it->funcs;
(gdb)n
89 if(!pval)
(gdb)
91 if((it->itype!=ASN1_ITYPE_PRIMITIVE)&&!*pval)
(gdb)
93 if(aux&&aux->asn1_cb)
(gdb)
96 asn1_cb=0;
(gdb)
98 switch(it->itype){(gdb)
146 if(asn1_do_lock(pval,-1,it)>0)
(gdb)
148 if(asn1_cb){(gdb)
153 asn1_enc_free(pval,it);
(gdb)s
asn1_enc_free(pval=0x7fffffffdf98,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_utl.c:154
154 enc=asn1_get_enc_ptr(pval,it);
(gdb)n
155 if(enc){(gdb)
162 }
(gdb)
asn1_item_combine_free(pval=0x7fffffffdf98,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_fre.c:159
159 tt=it->templates+it->tcount-1;
(gdb)
160 for(i=0;i<it->tcount;tt--,i++){(gdb)
162 seqtt=asn1_do_adb(pval,tt,0);
(gdb)
163 if(!seqtt)
(gdb)
165 pseqval=asn1_get_field_ptr(pval,seqtt);
(gdb)
166 ASN1_template_free(pseqval,seqtt);
(gdb)
160 for(i=0;i<it->tcount;tt--,i++){(gdb)
162 seqtt=asn1_do_adb(pval,tt,0);
(gdb)
163 if(!seqtt)
(gdb)
165 pseqval=asn1_get_field_ptr(pval,seqtt);
(gdb)
166 ASN1_template_free(pseqval,seqtt);
(gdb)s
ASN1_template_free(pval=0x6030b0,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>)attasn_fre.c:181
181 if(tt->flags&ASN1_TFLG_SK_MASK){(gdb)n
192 tt->flags&ASN1_TFLG_COMBINE);
(gdb)
191 asn1_item_combine_free(pval,ASN1_ITEM_ptr(tt->item),
(gdb)s
asn1_item_combine_free(pval=0x6030b0,it=0x7ffff7dbf740<ASN1_OBJECT_it>,combine=0)attasn_fre.c:83
83 constASN1_TEMPLATE*tt=NULL,*seqtt;
(gdb)n
86 constASN1_AUX*aux=it->funcs;
(gdb)
89 if(!pval)
(gdb)
91 if((it->itype!=ASN1_ITYPE_PRIMITIVE)&&!*pval)
(gdb)
93 if(aux&&aux->asn1_cb)
(gdb)
96 asn1_cb=0;
(gdb)
98 switch(it->itype){(gdb)
101 if(it->templates)
(gdb)
104 ASN1_primitive_free(pval,it);
(gdb)
105 break;
(gdb)
176 }
(gdb)
ASN1_template_free(pval=0x6030b0,tt=0x7ffff7dc58a0<X509_ALGOR_seq_tt>)attasn_fre.c:193
193 }
(gdb)n
asn1_item_combine_free(pval=0x7fffffffdf98,it=0x7ffff7dbed80<X509_ALGOR_it>,combine=0)attasn_fre.c:160
160 for(i=0;i<it->tcount;tt--,i++){(gdb)
168 if(asn1_cb)
(gdb)
170 if(!combine){(gdb)
171 OPENSSL_free(*pval);
(gdb)
172 *pval=NULL;
(gdb)
174 break;
(gdb)
176 }
(gdb)
ASN1_item_free(val=0x0,it=0x7ffff7dbed80<X509_ALGOR_it>)attasn_fre.c:73
73 }
(gdb)
main()atopenssl_x_algor_test.c:42
42 X509_ALGOR_free(alg3);
(gdb)
43 free(buf);
(gdb)n
44 return0;
(gdb)
45 }
(gdb)[/code]
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