1 /* crypto/asn1/asn1_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
62 #include <openssl/asn1.h>
63 #include <openssl/asn1_mac.h>
65 static int asn1_get_length(const unsigned char **pp, int *inf, size_t *rl,
67 static void asn1_put_length(unsigned char **pp, int length);
68 const char ASN1_version[]="ASN.1" OPENSSL_VERSION_PTEXT;
70 static int _asn1_check_infinite_end(const unsigned char **p, long len)
72 /* If there is 0 or 1 byte left, the length check should pick
76 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0))
84 int ASN1_check_infinite_end(unsigned char **p, size_t len)
86 return _asn1_check_infinite_end((const unsigned char **)p, len);
89 int ASN1_const_check_infinite_end(const unsigned char **p, size_t len)
91 return _asn1_check_infinite_end(p, len);
95 int ASN1_get_object(const unsigned char **pp, size_t *plength, int *ptag,
96 int *pclass, size_t omax)
100 const unsigned char *p= *pp;
107 ret=(*p&V_ASN1_CONSTRUCTED);
108 xclass=(*p&V_ASN1_PRIVATE);
109 i= *p&V_ASN1_PRIMITIVE_TAG;
110 if (i == V_ASN1_PRIMITIVE_TAG)
113 if (--max == 0) goto err;
119 if (--max == 0) goto err;
120 if (l > (INT_MAX >> 7L)) goto err;
125 if (--max == 0) goto err;
131 if (--max == 0) goto err;
135 if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err;
138 fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
139 (int)p,*plength,omax,(int)*pp,(int)(p+ *plength),
143 if (*plength > (omax - (p - *pp)))
145 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG);
146 /* Set this so that even if things are not long enough
147 * the values are set correctly */
153 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG);
157 static int asn1_get_length(const unsigned char **pp, int *inf, size_t *rl,
160 const unsigned char *p= *pp;
164 if (max-- < 1) return(0);
177 if (i > sizeof(long))
179 if (max-- == 0) return(0);
184 if (max-- == 0) return(0);
197 /* class 0 is constructed
198 * constructed == 2 for indefinite length constructed */
199 void ASN1_put_object(unsigned char **pp, int constructed, size_t length,
202 unsigned char *p= *pp;
205 i=(constructed)?V_ASN1_CONSTRUCTED:0;
206 i|=(xclass&V_ASN1_PRIVATE);
208 *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG);
211 *(p++)=i|V_ASN1_PRIMITIVE_TAG;
212 for(i = 0, ttag = tag; ttag > 0; i++) ttag >>=7;
217 if(i != (ttag - 1)) p[i] |= 0x80;
222 if (constructed == 2)
225 asn1_put_length(&p,length);
229 int ASN1_put_eoc(unsigned char **pp)
231 unsigned char *p = *pp;
238 static void asn1_put_length(unsigned char **pp, int length)
240 unsigned char *p= *pp;
243 *(p++)=(unsigned char)length;
247 for (i=0; l > 0; i++)
261 size_t ASN1_object_size(int constructed, size_t length, int tag)
275 if (constructed == 2)
289 static int _asn1_Finish(ASN1_const_CTX *c)
291 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos))
293 if (!ASN1_const_check_infinite_end(&c->p,c->slen))
295 c->error=ERR_R_MISSING_ASN1_EOS;
299 if ( ((c->slen != 0) && !(c->inf & 1)) ||
300 ((c->slen < 0) && (c->inf & 1)))
302 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
308 int asn1_Finish(ASN1_CTX *c)
310 return _asn1_Finish((ASN1_const_CTX *)c);
313 int asn1_const_Finish(ASN1_const_CTX *c)
315 return _asn1_Finish(c);
318 int asn1_GetSequence(ASN1_const_CTX *c, size_t *length)
320 const unsigned char *q;
323 c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass),
327 c->error=ERR_R_BAD_GET_ASN1_OBJECT_CALL;
330 if (c->tag != V_ASN1_SEQUENCE)
332 c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
336 if (c->max && (*length < 0))
338 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
341 if (c->inf == (1|V_ASN1_CONSTRUCTED))
342 c->slen= *length+ *(c->pp)-c->p;
347 int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
351 dst->type = str->type;
352 if (!ASN1_STRING_set(dst,str->data,str->length))
354 dst->flags = str->flags;
358 ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
363 ret=ASN1_STRING_new();
366 if (!ASN1_STRING_copy(ret,str))
368 ASN1_STRING_free(ret);
374 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, size_t len)
377 const char *data=_data;
386 if ((str->length < len) || (str->data == NULL))
390 str->data=OPENSSL_malloc(len+1);
392 str->data=OPENSSL_realloc(c,len+1);
394 if (str->data == NULL)
396 ASN1err(ASN1_F_ASN1_STRING_SET,ERR_R_MALLOC_FAILURE);
404 memcpy(str->data,data,len);
405 /* an allowance for strings :-) */
411 void ASN1_STRING_set0(ASN1_STRING *str, void *data, size_t len)
414 OPENSSL_free(str->data);
419 ASN1_STRING *ASN1_STRING_new(void)
421 return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
425 ASN1_STRING *ASN1_STRING_type_new(int type)
429 ret=(ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
432 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE);
442 void ASN1_STRING_free(ASN1_STRING *a)
444 if (a == NULL) return;
445 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
446 OPENSSL_free(a->data);
450 int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
454 i=(a->length-b->length);
457 i=memcmp(a->data,b->data,a->length);
459 return(a->type-b->type);
467 void asn1_add_error(const unsigned char *address, int offset)
469 char buf1[DECIMAL_SIZE(address)+1],buf2[DECIMAL_SIZE(offset)+1];
471 BIO_snprintf(buf1,sizeof buf1,"%lu",(unsigned long)address);
472 BIO_snprintf(buf2,sizeof buf2,"%d",offset);
473 ERR_add_error_data(4,"address=",buf1," offset=",buf2);
476 size_t ASN1_STRING_length(const ASN1_STRING *x)
477 { return M_ASN1_STRING_length(x); }
479 void ASN1_STRING_length_set(ASN1_STRING *x, size_t len)
480 { M_ASN1_STRING_length_set(x, len); return; }
482 int ASN1_STRING_type(ASN1_STRING *x)
483 { return M_ASN1_STRING_type(x); }
485 unsigned char * ASN1_STRING_data(ASN1_STRING *x)
486 { return M_ASN1_STRING_data(x); }