9fe51d5f73
Reported by: Daniel Marschall <daniel-marschall@viathinksoft.de> Reviewed by: steve Fix OID routines. Check on encoding leading zero rejection should start at beginning of encoding. Allow for initial digit when testing when to use BIGNUMs which can increase first value by 2 * 40.
403 lines
9.8 KiB
C
403 lines
9.8 KiB
C
/* crypto/asn1/a_object.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <limits.h>
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#include "cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/asn1.h>
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#include <openssl/objects.h>
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#include <openssl/bn.h>
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int i2d_ASN1_OBJECT(ASN1_OBJECT *a, unsigned char **pp)
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{
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unsigned char *p;
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int objsize;
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if ((a == NULL) || (a->data == NULL)) return(0);
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objsize = ASN1_object_size(0,a->length,V_ASN1_OBJECT);
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if (pp == NULL) return objsize;
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p= *pp;
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ASN1_put_object(&p,0,a->length,V_ASN1_OBJECT,V_ASN1_UNIVERSAL);
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memcpy(p,a->data,a->length);
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p+=a->length;
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*pp=p;
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return(objsize);
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}
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int a2d_ASN1_OBJECT(unsigned char *out, int olen, const char *buf, int num)
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{
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int i,first,len=0,c, use_bn;
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char ftmp[24], *tmp = ftmp;
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int tmpsize = sizeof ftmp;
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const char *p;
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unsigned long l;
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BIGNUM *bl = NULL;
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if (num == 0)
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return(0);
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else if (num == -1)
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num=strlen(buf);
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p=buf;
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c= *(p++);
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num--;
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if ((c >= '0') && (c <= '2'))
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{
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first= c-'0';
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}
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else
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_FIRST_NUM_TOO_LARGE);
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goto err;
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}
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if (num <= 0)
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_MISSING_SECOND_NUMBER);
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goto err;
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}
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c= *(p++);
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num--;
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for (;;)
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{
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if (num <= 0) break;
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if ((c != '.') && (c != ' '))
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_SEPARATOR);
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goto err;
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}
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l=0;
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use_bn = 0;
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for (;;)
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{
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if (num <= 0) break;
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num--;
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c= *(p++);
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if ((c == ' ') || (c == '.'))
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break;
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if ((c < '0') || (c > '9'))
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_INVALID_DIGIT);
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goto err;
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}
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if (!use_bn && l >= ((ULONG_MAX - 80) / 10L))
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{
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use_bn = 1;
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if (!bl)
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bl = BN_new();
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if (!bl || !BN_set_word(bl, l))
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goto err;
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}
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if (use_bn)
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{
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if (!BN_mul_word(bl, 10L)
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|| !BN_add_word(bl, c-'0'))
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goto err;
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}
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else
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l=l*10L+(long)(c-'0');
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}
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if (len == 0)
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{
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if ((first < 2) && (l >= 40))
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_SECOND_NUMBER_TOO_LARGE);
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goto err;
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}
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if (use_bn)
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{
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if (!BN_add_word(bl, first * 40))
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goto err;
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}
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else
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l+=(long)first*40;
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}
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i=0;
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if (use_bn)
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{
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int blsize;
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blsize = BN_num_bits(bl);
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blsize = (blsize + 6)/7;
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if (blsize > tmpsize)
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{
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if (tmp != ftmp)
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OPENSSL_free(tmp);
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tmpsize = blsize + 32;
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tmp = OPENSSL_malloc(tmpsize);
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if (!tmp)
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goto err;
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}
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while(blsize--)
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tmp[i++] = (unsigned char)BN_div_word(bl, 0x80L);
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}
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else
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{
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for (;;)
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{
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tmp[i++]=(unsigned char)l&0x7f;
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l>>=7L;
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if (l == 0L) break;
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}
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}
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if (out != NULL)
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{
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if (len+i > olen)
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{
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ASN1err(ASN1_F_A2D_ASN1_OBJECT,ASN1_R_BUFFER_TOO_SMALL);
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goto err;
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}
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while (--i > 0)
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out[len++]=tmp[i]|0x80;
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out[len++]=tmp[0];
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}
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else
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len+=i;
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}
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if (tmp != ftmp)
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OPENSSL_free(tmp);
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if (bl)
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BN_free(bl);
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return(len);
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err:
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if (tmp != ftmp)
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OPENSSL_free(tmp);
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if (bl)
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BN_free(bl);
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return(0);
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}
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int i2t_ASN1_OBJECT(char *buf, int buf_len, ASN1_OBJECT *a)
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{
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return OBJ_obj2txt(buf, buf_len, a, 0);
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}
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int i2a_ASN1_OBJECT(BIO *bp, ASN1_OBJECT *a)
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{
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char buf[80], *p = buf;
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int i;
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if ((a == NULL) || (a->data == NULL))
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return(BIO_write(bp,"NULL",4));
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i=i2t_ASN1_OBJECT(buf,sizeof buf,a);
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if (i > (int)(sizeof(buf) - 1))
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{
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p = OPENSSL_malloc(i + 1);
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if (!p)
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return -1;
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i2t_ASN1_OBJECT(p,i + 1,a);
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}
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if (i <= 0)
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return BIO_write(bp, "<INVALID>", 9);
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BIO_write(bp,p,i);
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if (p != buf)
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OPENSSL_free(p);
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return(i);
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}
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ASN1_OBJECT *d2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
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long length)
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{
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const unsigned char *p;
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long len;
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int tag,xclass;
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int inf,i;
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ASN1_OBJECT *ret = NULL;
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p= *pp;
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inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
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if (inf & 0x80)
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{
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i=ASN1_R_BAD_OBJECT_HEADER;
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goto err;
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}
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if (tag != V_ASN1_OBJECT)
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{
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i=ASN1_R_EXPECTING_AN_OBJECT;
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goto err;
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}
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ret = c2i_ASN1_OBJECT(a, &p, len);
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if(ret) *pp = p;
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return ret;
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err:
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ASN1err(ASN1_F_D2I_ASN1_OBJECT,i);
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return(NULL);
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}
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ASN1_OBJECT *c2i_ASN1_OBJECT(ASN1_OBJECT **a, const unsigned char **pp,
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long len)
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{
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ASN1_OBJECT *ret=NULL;
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const unsigned char *p;
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unsigned char *data;
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int i;
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/* Sanity check OID encoding: can't have leading 0x80 in
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* subidentifiers, see: X.690 8.19.2
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*/
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for (i = 0, p = *pp; i < len; i++, p++)
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{
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if (*p == 0x80 && (!i || !(p[-1] & 0x80)))
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{
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ASN1err(ASN1_F_C2I_ASN1_OBJECT,ASN1_R_INVALID_OBJECT_ENCODING);
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return NULL;
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}
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}
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/* only the ASN1_OBJECTs from the 'table' will have values
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* for ->sn or ->ln */
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if ((a == NULL) || ((*a) == NULL) ||
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!((*a)->flags & ASN1_OBJECT_FLAG_DYNAMIC))
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{
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if ((ret=ASN1_OBJECT_new()) == NULL) return(NULL);
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}
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else ret=(*a);
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p= *pp;
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/* detach data from object */
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data = (unsigned char *)ret->data;
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ret->data = NULL;
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/* once detached we can change it */
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if ((data == NULL) || (ret->length < len))
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{
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ret->length=0;
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if (data != NULL) OPENSSL_free(data);
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data=(unsigned char *)OPENSSL_malloc(len ? (int)len : 1);
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if (data == NULL)
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{ i=ERR_R_MALLOC_FAILURE; goto err; }
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ret->flags|=ASN1_OBJECT_FLAG_DYNAMIC_DATA;
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}
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memcpy(data,p,(int)len);
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/* reattach data to object, after which it remains const */
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ret->data =data;
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ret->length=(int)len;
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ret->sn=NULL;
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ret->ln=NULL;
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/* ret->flags=ASN1_OBJECT_FLAG_DYNAMIC; we know it is dynamic */
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p+=len;
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if (a != NULL) (*a)=ret;
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*pp=p;
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return(ret);
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err:
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ASN1err(ASN1_F_C2I_ASN1_OBJECT,i);
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if ((ret != NULL) && ((a == NULL) || (*a != ret)))
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ASN1_OBJECT_free(ret);
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return(NULL);
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}
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ASN1_OBJECT *ASN1_OBJECT_new(void)
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{
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ASN1_OBJECT *ret;
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ret=(ASN1_OBJECT *)OPENSSL_malloc(sizeof(ASN1_OBJECT));
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if (ret == NULL)
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{
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ASN1err(ASN1_F_ASN1_OBJECT_NEW,ERR_R_MALLOC_FAILURE);
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return(NULL);
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}
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ret->length=0;
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ret->data=NULL;
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ret->nid=0;
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ret->sn=NULL;
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ret->ln=NULL;
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ret->flags=ASN1_OBJECT_FLAG_DYNAMIC;
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return(ret);
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}
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void ASN1_OBJECT_free(ASN1_OBJECT *a)
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{
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if (a == NULL) return;
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_STRINGS)
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{
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#ifndef CONST_STRICT /* disable purely for compile-time strict const checking. Doing this on a "real" compile will cause memory leaks */
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if (a->sn != NULL) OPENSSL_free((void *)a->sn);
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if (a->ln != NULL) OPENSSL_free((void *)a->ln);
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#endif
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a->sn=a->ln=NULL;
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}
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC_DATA)
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{
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if (a->data != NULL) OPENSSL_free((void *)a->data);
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a->data=NULL;
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a->length=0;
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}
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if (a->flags & ASN1_OBJECT_FLAG_DYNAMIC)
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OPENSSL_free(a);
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}
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ASN1_OBJECT *ASN1_OBJECT_create(int nid, unsigned char *data, int len,
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const char *sn, const char *ln)
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{
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ASN1_OBJECT o;
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o.sn=sn;
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o.ln=ln;
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o.data=data;
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o.nid=nid;
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o.length=len;
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o.flags=ASN1_OBJECT_FLAG_DYNAMIC|ASN1_OBJECT_FLAG_DYNAMIC_STRINGS|
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ASN1_OBJECT_FLAG_DYNAMIC_DATA;
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return(OBJ_dup(&o));
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}
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IMPLEMENT_STACK_OF(ASN1_OBJECT)
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IMPLEMENT_ASN1_SET_OF(ASN1_OBJECT)
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