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212 lines
5.9 KiB
212 lines
5.9 KiB
/* crypto/asn1/f_string.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 "cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/asn1.h>
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int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)
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{
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int i,n=0;
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static const char *h="0123456789ABCDEF";
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char buf[2];
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if (a == NULL) return(0);
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if (a->length == 0)
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{
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if (BIO_write(bp,"0",1) != 1) goto err;
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n=1;
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}
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else
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{
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for (i=0; i<a->length; i++)
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{
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if ((i != 0) && (i%35 == 0))
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{
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if (BIO_write(bp,"\\\n",2) != 2) goto err;
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n+=2;
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}
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buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f];
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buf[1]=h[((unsigned char)a->data[i] )&0x0f];
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if (BIO_write(bp,buf,2) != 2) goto err;
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n+=2;
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}
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}
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return(n);
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err:
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return(-1);
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}
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int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size)
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{
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int ret=0;
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int i,j,k,m,n,again,bufsize;
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unsigned char *s=NULL,*sp;
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unsigned char *bufp;
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int num=0,slen=0,first=1;
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bufsize=BIO_gets(bp,buf,size);
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for (;;)
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{
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if (bufsize < 1)
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{
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if (first)
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break;
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else
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goto err_sl;
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}
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first=0;
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i=bufsize;
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if (buf[i-1] == '\n') buf[--i]='\0';
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if (i == 0) goto err_sl;
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if (buf[i-1] == '\r') buf[--i]='\0';
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if (i == 0) goto err_sl;
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again=(buf[i-1] == '\\');
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for (j=i-1; j>0; j--)
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{
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#ifndef CHARSET_EBCDIC
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if (!( ((buf[j] >= '0') && (buf[j] <= '9')) ||
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((buf[j] >= 'a') && (buf[j] <= 'f')) ||
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((buf[j] >= 'A') && (buf[j] <= 'F'))))
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#else
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/* This #ifdef is not strictly necessary, since
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* the characters A...F a...f 0...9 are contiguous
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* (yes, even in EBCDIC - but not the whole alphabet).
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* Nevertheless, isxdigit() is faster.
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*/
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if (!isxdigit(buf[j]))
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#endif
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{
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i=j;
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break;
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}
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}
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buf[i]='\0';
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/* We have now cleared all the crap off the end of the
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* line */
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if (i < 2) goto err_sl;
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bufp=(unsigned char *)buf;
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k=0;
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i-=again;
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if (i%2 != 0)
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{
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ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_ODD_NUMBER_OF_CHARS);
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goto err;
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}
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i/=2;
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if (num+i > slen)
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{
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if (s == NULL)
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sp=(unsigned char *)OPENSSL_malloc(
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(unsigned int)num+i*2);
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else
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sp=(unsigned char *)OPENSSL_realloc(s,
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(unsigned int)num+i*2);
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if (sp == NULL)
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{
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ASN1err(ASN1_F_A2I_ASN1_STRING,ERR_R_MALLOC_FAILURE);
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if (s != NULL) OPENSSL_free(s);
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goto err;
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}
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s=sp;
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slen=num+i*2;
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}
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for (j=0; j<i; j++,k+=2)
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{
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for (n=0; n<2; n++)
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{
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m=bufp[k+n];
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if ((m >= '0') && (m <= '9'))
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m-='0';
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else if ((m >= 'a') && (m <= 'f'))
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m=m-'a'+10;
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else if ((m >= 'A') && (m <= 'F'))
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m=m-'A'+10;
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else
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{
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ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_NON_HEX_CHARACTERS);
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goto err;
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}
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s[num+j]<<=4;
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s[num+j]|=m;
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}
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}
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num+=i;
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if (again)
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bufsize=BIO_gets(bp,buf,size);
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else
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break;
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}
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bs->length=num;
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bs->data=s;
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ret=1;
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err:
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if (0)
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{
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err_sl:
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ASN1err(ASN1_F_A2I_ASN1_STRING,ASN1_R_SHORT_LINE);
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}
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return(ret);
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}
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