155714Skris/* crypto/asn1/a_bytes.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 855714Skris * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 1555714Skris * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 2255714Skris * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 3755714Skris * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4055714Skris * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 5255714Skris * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 61109998Smarkm#include <openssl/asn1.h> 6255714Skris 63160814Ssimonstatic int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c); 6455714Skris/* type is a 'bitmap' of acceptable string types. 6555714Skris */ 66160814SsimonASN1_STRING *d2i_ASN1_type_bytes(ASN1_STRING **a, const unsigned char **pp, 6755714Skris long length, int type) 6855714Skris { 6955714Skris ASN1_STRING *ret=NULL; 70160814Ssimon const unsigned char *p; 71160814Ssimon unsigned char *s; 7255714Skris long len; 7355714Skris int inf,tag,xclass; 7455714Skris int i=0; 7555714Skris 7655714Skris p= *pp; 7755714Skris inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 7855714Skris if (inf & 0x80) goto err; 7955714Skris 8055714Skris if (tag >= 32) 8155714Skris { 82194206Ssimon i=ASN1_R_TAG_VALUE_TOO_HIGH; 8355714Skris goto err; 8455714Skris } 85109998Smarkm if (!(ASN1_tag2bit(tag) & type)) 8655714Skris { 8755714Skris i=ASN1_R_WRONG_TYPE; 8855714Skris goto err; 8955714Skris } 9055714Skris 9155714Skris /* If a bit-string, exit early */ 9255714Skris if (tag == V_ASN1_BIT_STRING) 9355714Skris return(d2i_ASN1_BIT_STRING(a,pp,length)); 9455714Skris 9555714Skris if ((a == NULL) || ((*a) == NULL)) 9655714Skris { 9755714Skris if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 9855714Skris } 9955714Skris else 10055714Skris ret=(*a); 10155714Skris 10255714Skris if (len != 0) 10355714Skris { 10468651Skris s=(unsigned char *)OPENSSL_malloc((int)len+1); 10555714Skris if (s == NULL) 10655714Skris { 10755714Skris i=ERR_R_MALLOC_FAILURE; 10855714Skris goto err; 10955714Skris } 11055714Skris memcpy(s,p,(int)len); 11155714Skris s[len]='\0'; 11255714Skris p+=len; 11355714Skris } 11455714Skris else 11555714Skris s=NULL; 11655714Skris 11768651Skris if (ret->data != NULL) OPENSSL_free(ret->data); 11855714Skris ret->length=(int)len; 11955714Skris ret->data=s; 12055714Skris ret->type=tag; 12155714Skris if (a != NULL) (*a)=ret; 12255714Skris *pp=p; 12355714Skris return(ret); 12455714Skriserr: 12555714Skris ASN1err(ASN1_F_D2I_ASN1_TYPE_BYTES,i); 12655714Skris if ((ret != NULL) && ((a == NULL) || (*a != ret))) 12755714Skris ASN1_STRING_free(ret); 12855714Skris return(NULL); 12955714Skris } 13055714Skris 13155714Skrisint i2d_ASN1_bytes(ASN1_STRING *a, unsigned char **pp, int tag, int xclass) 13255714Skris { 13355714Skris int ret,r,constructed; 13455714Skris unsigned char *p; 13555714Skris 13655714Skris if (a == NULL) return(0); 13755714Skris 13855714Skris if (tag == V_ASN1_BIT_STRING) 13955714Skris return(i2d_ASN1_BIT_STRING(a,pp)); 14055714Skris 14155714Skris ret=a->length; 14255714Skris r=ASN1_object_size(0,ret,tag); 14355714Skris if (pp == NULL) return(r); 14455714Skris p= *pp; 14555714Skris 14655714Skris if ((tag == V_ASN1_SEQUENCE) || (tag == V_ASN1_SET)) 14755714Skris constructed=1; 14855714Skris else 14955714Skris constructed=0; 15055714Skris ASN1_put_object(&p,constructed,ret,tag,xclass); 15155714Skris memcpy(p,a->data,a->length); 15255714Skris p+=a->length; 15355714Skris *pp= p; 15455714Skris return(r); 15555714Skris } 15655714Skris 157160814SsimonASN1_STRING *d2i_ASN1_bytes(ASN1_STRING **a, const unsigned char **pp, 158160814Ssimon long length, int Ptag, int Pclass) 15955714Skris { 16055714Skris ASN1_STRING *ret=NULL; 161160814Ssimon const unsigned char *p; 162160814Ssimon unsigned char *s; 16355714Skris long len; 16455714Skris int inf,tag,xclass; 16555714Skris int i=0; 16655714Skris 16755714Skris if ((a == NULL) || ((*a) == NULL)) 16855714Skris { 16955714Skris if ((ret=ASN1_STRING_new()) == NULL) return(NULL); 17055714Skris } 17155714Skris else 17255714Skris ret=(*a); 17355714Skris 17455714Skris p= *pp; 17555714Skris inf=ASN1_get_object(&p,&len,&tag,&xclass,length); 17655714Skris if (inf & 0x80) 17755714Skris { 17855714Skris i=ASN1_R_BAD_OBJECT_HEADER; 17955714Skris goto err; 18055714Skris } 18155714Skris 18255714Skris if (tag != Ptag) 18355714Skris { 18455714Skris i=ASN1_R_WRONG_TAG; 18555714Skris goto err; 18655714Skris } 18755714Skris 18855714Skris if (inf & V_ASN1_CONSTRUCTED) 18955714Skris { 190160814Ssimon ASN1_const_CTX c; 19155714Skris 19255714Skris c.pp=pp; 19355714Skris c.p=p; 19455714Skris c.inf=inf; 19555714Skris c.slen=len; 19655714Skris c.tag=Ptag; 19755714Skris c.xclass=Pclass; 19855714Skris c.max=(length == 0)?0:(p+length); 19959191Skris if (!asn1_collate_primitive(ret,&c)) 20055714Skris goto err; 20155714Skris else 20255714Skris { 20355714Skris p=c.p; 20455714Skris } 20555714Skris } 20655714Skris else 20755714Skris { 20855714Skris if (len != 0) 20955714Skris { 21055714Skris if ((ret->length < len) || (ret->data == NULL)) 21155714Skris { 21268651Skris if (ret->data != NULL) OPENSSL_free(ret->data); 21368651Skris s=(unsigned char *)OPENSSL_malloc((int)len + 1); 21455714Skris if (s == NULL) 21555714Skris { 21655714Skris i=ERR_R_MALLOC_FAILURE; 21755714Skris goto err; 21855714Skris } 21955714Skris } 22055714Skris else 22155714Skris s=ret->data; 22255714Skris memcpy(s,p,(int)len); 22359191Skris s[len] = '\0'; 22455714Skris p+=len; 22555714Skris } 22655714Skris else 22755714Skris { 22855714Skris s=NULL; 22968651Skris if (ret->data != NULL) OPENSSL_free(ret->data); 23055714Skris } 23155714Skris 23255714Skris ret->length=(int)len; 23355714Skris ret->data=s; 23455714Skris ret->type=Ptag; 23555714Skris } 23655714Skris 23755714Skris if (a != NULL) (*a)=ret; 23855714Skris *pp=p; 23955714Skris return(ret); 24055714Skriserr: 24155714Skris if ((ret != NULL) && ((a == NULL) || (*a != ret))) 24255714Skris ASN1_STRING_free(ret); 24355714Skris ASN1err(ASN1_F_D2I_ASN1_BYTES,i); 24455714Skris return(NULL); 24555714Skris } 24655714Skris 24755714Skris 24859191Skris/* We are about to parse 0..n d2i_ASN1_bytes objects, we are to collapse 24959191Skris * them into the one structure that is then returned */ 25055714Skris/* There have been a few bug fixes for this function from 25155714Skris * Paul Keogh <paul.keogh@sse.ie>, many thanks to him */ 252160814Ssimonstatic int asn1_collate_primitive(ASN1_STRING *a, ASN1_const_CTX *c) 25355714Skris { 25455714Skris ASN1_STRING *os=NULL; 25555714Skris BUF_MEM b; 25655714Skris int num; 25755714Skris 25855714Skris b.length=0; 25955714Skris b.max=0; 26055714Skris b.data=NULL; 26155714Skris 26255714Skris if (a == NULL) 26355714Skris { 26455714Skris c->error=ERR_R_PASSED_NULL_PARAMETER; 26555714Skris goto err; 26655714Skris } 26755714Skris 26855714Skris num=0; 26955714Skris for (;;) 27055714Skris { 27155714Skris if (c->inf & 1) 27255714Skris { 273160814Ssimon c->eos=ASN1_const_check_infinite_end(&c->p, 27455714Skris (long)(c->max-c->p)); 27555714Skris if (c->eos) break; 27655714Skris } 27755714Skris else 27855714Skris { 27955714Skris if (c->slen <= 0) break; 28055714Skris } 28155714Skris 28255714Skris c->q=c->p; 28355714Skris if (d2i_ASN1_bytes(&os,&c->p,c->max-c->p,c->tag,c->xclass) 28455714Skris == NULL) 28555714Skris { 28655714Skris c->error=ERR_R_ASN1_LIB; 28755714Skris goto err; 28855714Skris } 28955714Skris 290109998Smarkm if (!BUF_MEM_grow_clean(&b,num+os->length)) 29155714Skris { 29255714Skris c->error=ERR_R_BUF_LIB; 29355714Skris goto err; 29455714Skris } 29555714Skris memcpy(&(b.data[num]),os->data,os->length); 29655714Skris if (!(c->inf & 1)) 29755714Skris c->slen-=(c->p-c->q); 29855714Skris num+=os->length; 29955714Skris } 30055714Skris 301160814Ssimon if (!asn1_const_Finish(c)) goto err; 30255714Skris 30355714Skris a->length=num; 30468651Skris if (a->data != NULL) OPENSSL_free(a->data); 30555714Skris a->data=(unsigned char *)b.data; 30655714Skris if (os != NULL) ASN1_STRING_free(os); 30755714Skris return(1); 30855714Skriserr: 30955714Skris ASN1err(ASN1_F_ASN1_COLLATE_PRIMITIVE,c->error); 31055714Skris if (os != NULL) ASN1_STRING_free(os); 31168651Skris if (b.data != NULL) OPENSSL_free(b.data); 31255714Skris return(0); 31355714Skris } 31455714Skris 315