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.]
61 #include <openssl/asn1.h>
62 #include <openssl/asn1_mac.h>
64 static int asn1_get_length(unsigned char **pp,int *inf,long *rl,int max);
65 static void asn1_put_length(unsigned char **pp, int length);
66 const char *ASN1_version="ASN.1" OPENSSL_VERSION_PTEXT;
68 int ASN1_check_infinite_end(unsigned char **p, long len)
70 /* If there is 0 or 1 byte left, the length check should pick
74 else if ((len >= 2) && ((*p)[0] == 0) && ((*p)[1] == 0))
83 int ASN1_get_object(unsigned char **pp, long *plength, int *ptag, int *pclass,
88 unsigned char *p= *pp;
93 ret=(*p&V_ASN1_CONSTRUCTED);
94 xclass=(*p&V_ASN1_PRIVATE);
95 i= *p&V_ASN1_PRIMITIVE_TAG;
96 if (i == V_ASN1_PRIMITIVE_TAG)
99 if (--max == 0) goto err;
105 if (--max == 0) goto err;
115 if (--max == 0) goto err;
119 if (!asn1_get_length(&p,&inf,plength,(int)max)) goto err;
122 fprintf(stderr,"p=%d + *plength=%ld > omax=%ld + *pp=%d (%d > %d)\n",
123 (int)p,*plength,omax,(int)*pp,(int)(p+ *plength),
128 if ((p+ *plength) > (omax+ *pp))
130 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_TOO_LONG);
131 /* Set this so that even if things are not long enough
132 * the values are set correctly */
139 ASN1err(ASN1_F_ASN1_GET_OBJECT,ASN1_R_HEADER_TOO_LONG);
143 static int asn1_get_length(unsigned char **pp, int *inf, long *rl, int max)
145 unsigned char *p= *pp;
149 if (max-- < 1) return(0);
162 if (max-- == 0) return(0);
167 if (max-- == 0) return(0);
178 /* class 0 is constructed
179 * constructed == 2 for indefinitle length constructed */
180 void ASN1_put_object(unsigned char **pp, int constructed, int length, int tag,
183 unsigned char *p= *pp;
186 i=(constructed)?V_ASN1_CONSTRUCTED:0;
187 i|=(xclass&V_ASN1_PRIVATE);
189 *(p++)=i|(tag&V_ASN1_PRIMITIVE_TAG);
192 *(p++)=i|V_ASN1_PRIMITIVE_TAG;
195 *(p++)=(tag&0x7f)|0x80;
200 if ((constructed == 2) && (length == 0))
201 *(p++)=0x80; /* der_put_length would output 0 instead */
203 asn1_put_length(&p,length);
207 static void asn1_put_length(unsigned char **pp, int length)
209 unsigned char *p= *pp;
212 *(p++)=(unsigned char)length;
216 for (i=0; l > 0; i++)
230 int ASN1_object_size(int constructed, int length, int tag)
244 if ((length == 0) && (constructed == 2))
258 int asn1_Finish(ASN1_CTX *c)
260 if ((c->inf == (1|V_ASN1_CONSTRUCTED)) && (!c->eos))
262 if (!ASN1_check_infinite_end(&c->p,c->slen))
264 c->error=ERR_R_MISSING_ASN1_EOS;
268 if ( ((c->slen != 0) && !(c->inf & 1)) ||
269 ((c->slen < 0) && (c->inf & 1)))
271 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
277 int asn1_GetSequence(ASN1_CTX *c, long *length)
282 c->inf=ASN1_get_object(&(c->p),&(c->slen),&(c->tag),&(c->xclass),
286 c->error=ERR_R_BAD_GET_ASN1_OBJECT_CALL;
289 if (c->tag != V_ASN1_SEQUENCE)
291 c->error=ERR_R_EXPECTING_AN_ASN1_SEQUENCE;
295 if (c->max && (*length < 0))
297 c->error=ERR_R_ASN1_LENGTH_MISMATCH;
300 if (c->inf == (1|V_ASN1_CONSTRUCTED))
301 c->slen= *length+ *(c->pp)-c->p;
306 ASN1_STRING *ASN1_STRING_dup(ASN1_STRING *str)
310 if (str == NULL) return(NULL);
311 if ((ret=ASN1_STRING_type_new(str->type)) == NULL)
313 if (!ASN1_STRING_set(ret,str->data,str->length))
315 ASN1_STRING_free(ret);
318 ret->flags = str->flags;
322 int ASN1_STRING_set(ASN1_STRING *str, const void *_data, int len)
325 const char *data=_data;
334 if ((str->length < len) || (str->data == NULL))
338 str->data=Malloc(len+1);
340 str->data=Realloc(c,len+1);
342 if (str->data == NULL)
351 memcpy(str->data,data,len);
352 /* an alowance for strings :-) */
358 ASN1_STRING *ASN1_STRING_new(void)
360 return(ASN1_STRING_type_new(V_ASN1_OCTET_STRING));
364 ASN1_STRING *ASN1_STRING_type_new(int type)
368 ret=(ASN1_STRING *)Malloc(sizeof(ASN1_STRING));
371 ASN1err(ASN1_F_ASN1_STRING_TYPE_NEW,ERR_R_MALLOC_FAILURE);
381 void ASN1_STRING_free(ASN1_STRING *a)
383 if (a == NULL) return;
384 if (a->data != NULL) Free((char *)a->data);
388 int ASN1_STRING_cmp(ASN1_STRING *a, ASN1_STRING *b)
392 i=(a->length-b->length);
395 i=memcmp(a->data,b->data,a->length);
397 return(a->type-b->type);
405 void asn1_add_error(unsigned char *address, int offset)
407 char buf1[16],buf2[16];
409 sprintf(buf1,"%lu",(unsigned long)address);
410 sprintf(buf2,"%d",offset);
411 ERR_add_error_data(4,"address=",buf1," offset=",buf2);