/* crypto/asn1/a_d2i_fp.c */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include <stdio.h> #include "cryptlib.h" #include <openssl/buffer.h> #include <openssl/asn1_mac.h> #define HEADER_SIZE 8 #ifndef NO_FP_API char *ASN1_d2i_fp(char *(*xnew)(), char *(*d2i)(), FILE *in, unsigned char **x) { BIO *b; char *ret; if ((b=BIO_new(BIO_s_file())) == NULL) { ASN1err(ASN1_F_ASN1_D2I_FP,ERR_R_BUF_LIB); return(NULL); } BIO_set_fp(b,in,BIO_NOCLOSE); ret=ASN1_d2i_bio(xnew,d2i,b,x); BIO_free(b); return(ret); } #endif char *ASN1_d2i_bio(char *(*xnew)(), char *(*d2i)(), BIO *in, unsigned char **x) { BUF_MEM *b; unsigned char *p; int i; char *ret=NULL; ASN1_CTX c; int want=HEADER_SIZE; int eos=0; int off=0; int len=0; b=BUF_MEM_new(); if (b == NULL) { ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE); return(NULL); } ERR_clear_error(); for (;;) { if (want >= (len-off)) { want-=(len-off); if (!BUF_MEM_grow(b,len+want)) { ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE); goto err; } i=BIO_read(in,&(b->data[len]),want); if ((i < 0) && ((len-off) == 0)) { ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA); goto err; } if (i > 0) len+=i; } /* else data already loaded */ p=(unsigned char *)&(b->data[off]); c.p=p; c.inf=ASN1_get_object(&(c.p),&(c.slen),&(c.tag),&(c.xclass), len-off); if (c.inf & 0x80) { unsigned long e; e=ERR_GET_REASON(ERR_peek_error()); if (e != ASN1_R_TOO_LONG) goto err; else ERR_get_error(); /* clear error */ } i=c.p-p;/* header length */ off+=i; /* end of data */ if (c.inf & 1) { /* no data body so go round again */ eos++; want=HEADER_SIZE; } else if (eos && (c.slen == 0) && (c.tag == V_ASN1_EOC)) { /* eos value, so go back and read another header */ eos--; if (eos <= 0) break; else want=HEADER_SIZE; } else { /* suck in c.slen bytes of data */ want=(int)c.slen; if (want > (len-off)) { want-=(len-off); if (!BUF_MEM_grow(b,len+want)) { ASN1err(ASN1_F_ASN1_D2I_BIO,ERR_R_MALLOC_FAILURE); goto err; } i=BIO_read(in,&(b->data[len]),want); if (i <= 0) { ASN1err(ASN1_F_ASN1_D2I_BIO,ASN1_R_NOT_ENOUGH_DATA); goto err; } len+=i; } off+=(int)c.slen; if (eos <= 0) { break; } else want=HEADER_SIZE; } } p=(unsigned char *)b->data; ret=d2i(x,&p,off); err: if (b != NULL) BUF_MEM_free(b); return(ret); }