154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/* v3_utl.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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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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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <ctype.h>
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#include "cryptlib.h"
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#include <openssl/conf.h>
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#include <openssl/x509v3.h>
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/* hex string utilities */
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/* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
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* hex representation
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* @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
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*/
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char *hex_to_string(unsigned char *buffer, long len)
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{
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char *tmp, *q;
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unsigned char *p;
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int i;
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static char hexdig[] = "0123456789ABCDEF";
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if(!buffer || !len) return NULL;
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if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
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X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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q = tmp;
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for(i = 0, p = buffer; i < len; i++,p++) {
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*q++ = hexdig[(*p >> 4) & 0xf];
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*q++ = hexdig[*p & 0xf];
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*q++ = ':';
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}
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q[-1] = 0;
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#ifdef CHARSET_EBCDIC
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ebcdic2ascii(tmp, tmp, q - tmp - 1);
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#endif
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return tmp;
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}
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/* Give a string of hex digits convert to
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* a buffer
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*/
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unsigned char *string_to_hex(char *str, long *len)
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{
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unsigned char *hexbuf, *q;
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unsigned char ch, cl, *p;
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if(!str) {
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X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
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return NULL;
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}
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if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
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for(p = (unsigned char *)str, q = hexbuf; *p;) {
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ch = *p++;
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#ifdef CHARSET_EBCDIC
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ch = os_toebcdic[ch];
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#endif
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if(ch == ':') continue;
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cl = *p++;
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#ifdef CHARSET_EBCDIC
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cl = os_toebcdic[cl];
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#endif
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if(!cl) {
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X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
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OPENSSL_free(hexbuf);
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return NULL;
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}
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if(isupper(ch)) ch = tolower(ch);
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if(isupper(cl)) cl = tolower(cl);
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if((ch >= '0') && (ch <= '9')) ch -= '0';
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else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
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else goto badhex;
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if((cl >= '0') && (cl <= '9')) cl -= '0';
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else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
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else goto badhex;
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*q++ = (ch << 4) | cl;
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}
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if(len) *len = q - hexbuf;
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return hexbuf;
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err:
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if(hexbuf) OPENSSL_free(hexbuf);
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X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
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return NULL;
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badhex:
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OPENSSL_free(hexbuf);
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X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
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return NULL;
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}
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