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,long *rl,int max);
66 static void asn1_put_length(unsigned char **pp, int length);
67 const char ASN1_version[]="ASN.1" OPENSSL_VERSION_PTEXT;
69 static int _asn1_check_infinite_end(const unsigned char **p, long len)
71 /* If there is 0 or 1 byte left, the length check should pick
75 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0))
83 int ASN1_check_infinite_end(unsigned char **p, long len)
85 return _asn1_check_infinite_end((const unsigned char **)p, len);
88 int ASN1_const_check_infinite_end(const unsigned char **p, long len)
90 return _asn1_check_infinite_end(p, len);
94 int ASN1_get_object(const unsigned char **pp, long *plength, int *ptag,
95 int *pclass, long omax)
99 const unsigned char *p= *pp;
104 ret=(*p&V_ASN1_CONSTRUCTED);
105 xclass=(*p&V_ASN1_PRIVATE);
106 i= *p&V_ASN1_PRIMITIVE_TAG;
107 if (i == V_ASN1_PRIMITIVE_TAG)
110 if (--max == 0) goto err;
116 if (--max == 0) goto err;
117 if (l > (INT_MAX >> 7L)) goto err;
122 if (--max == 0) goto err;
128 if (--max == 0) goto err;
132 if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err;
135 fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
136 (int)p,*plength,omax,(int)*pp,(int)(p+ *plength),
140 if (*plength > (omax - (p - *pp)))
142 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG);
143 /* Set this so that even if things are not long enough
144 * the values are set correctly */
150 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG);
154 static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max)
156 const unsigned char *p= *pp;
160 if (max-- < 1) return(0);
175 /* Skip leading zeroes */
181 if (i > sizeof(long))
199 /* class 0 is constructed
200 * constructed == 2 for indefinite length constructed */
201 void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
204 unsigned char *p= *pp;
207 i=(constructed)?V_ASN1_CONSTRUCTED:0;
208 i|=(xclass&V_ASN1_PRIVATE);
210 *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG);
213 *(p++)=i|V_ASN1_PRIMITIVE_TAG;
214 for(i = 0, ttag = tag; ttag > 0; i++) ttag >>=7;
219 if(i != (ttag - 1)) p[i] |= 0x80;
224 if (constructed == 2)
227 asn1_put_length(&p,length);
231 int ASN1_put_eoc(unsigned char **pp)
233 unsigned char *p = *pp;
240 static void asn1_put_length(unsigned char **pp, int length)
242 unsigned char *p= *pp;
245 *(p++)=(unsigned char)length;
249 for (i=0; l > 0; i++)
263 int ASN1_object_size(int constructed, int length, int tag)
277 if (constructed == 2)
291 static int _asn1_Finish(ASN1_const_CTX *c)
293 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos))
295 if (!ASN1_const_check_infinite_end(&c->p,c->slen))
297 c->error=ERR_R_MISSING_ASN1_EOS;
301 if ( ((c->slen != 0) && !(c->inf & 1)) ||
302 ((c->slen < 0) && (c->inf & 1)))
304 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
310 int asn1_Finish(ASN1_CTX *c)
312 return _asn1_Finish((ASN1_const_CTX *)c);
315 int asn1_const_Finish(ASN1_const_CTX *c)
317 return _asn1_Finish(c);
320 int asn1_GetSequence(ASN1_const_CTX *c, long *length)
322 const unsigned char *q;
325 c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass),
329 c->error=ERR_R_BAD_GET_ASN1_OBJECT_CALL;
332 if (c->tag != V_ASN1_SEQUENCE)
334 c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
338 if (c->max && (*length < 0))
340 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
343 if (c->inf == (1|V_ASN1_CONSTRUCTED))
344 c->slen= *length+ *(c->pp)-c->p;
349 int ASN1_STRING_copy(ASN1_STRING *dst, const ASN1_STRING *str)
353 dst->type = str->type;
354 if (!ASN1_STRING_set(dst,str->data,str->length))
356 dst->flags = str->flags;
360 ASN1_STRING *ASN1_STRING_dup(const ASN1_STRING *str)
365 ret=ASN1_STRING_new();
368 if (!ASN1_STRING_copy(ret,str))
370 ASN1_STRING_free(ret);
376 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
379 const char *data=_data;
388 if ((str->length < len) || (str->data == NULL))
392 str->data=OPENSSL_malloc(len+1);
394 str->data=OPENSSL_realloc(c,len+1);
396 if (str->data == NULL)
398 ASN1err(ASN1_F_ASN1_STRING_SET,ERR_R_MALLOC_FAILURE);
406 memcpy(str->data,data,len);
407 /* an allowance for strings :-) */
413 void ASN1_STRING_set0(ASN1_STRING *str, void *data, int len)
416 OPENSSL_free(str->data);
421 ASN1_STRING *ASN1_STRING_new(void)
423 return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
427 ASN1_STRING *ASN1_STRING_type_new(int type)
431 ret=(ASN1_STRING *)OPENSSL_malloc(sizeof(ASN1_STRING));
434 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE);
444 void ASN1_STRING_free(ASN1_STRING *a)
446 if (a == NULL) return;
447 if (a->data && !(a->flags & ASN1_STRING_FLAG_NDEF))
448 OPENSSL_free(a->data);
452 int ASN1_STRING_cmp(const ASN1_STRING *a, const ASN1_STRING *b)
456 i=(a->length-b->length);
459 i=memcmp(a->data,b->data,a->length);
461 return(a->type-b->type);
469 void asn1_add_error(const unsigned char *address, int offset)
471 char buf1[DECIMAL_SIZE(address)+1],buf2[DECIMAL_SIZE(offset)+1];
473 BIO_snprintf(buf1,sizeof buf1,"%lu",(unsigned long)address);
474 BIO_snprintf(buf2,sizeof buf2,"%d",offset);
475 ERR_add_error_data(4,"address=",buf1," offset=",buf2);
478 int ASN1_STRING_length(const ASN1_STRING *x)
479 { return M_ASN1_STRING_length(x); }
481 void ASN1_STRING_length_set(ASN1_STRING *x, int len)
482 { M_ASN1_STRING_length_set(x, len); return; }
484 int ASN1_STRING_type(ASN1_STRING *x)
485 { return M_ASN1_STRING_type(x); }
487 unsigned char * ASN1_STRING_data(ASN1_STRING *x)
488 { return M_ASN1_STRING_data(x); }