428 lines
10 KiB
C
428 lines
10 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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/* X509 v3 extension utilities */
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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 "conf.h"
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#include "x509v3.h"
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static char *strip_spaces(char *name);
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/* Add a CONF_VALUE name value pair to stack */
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int X509V3_add_value(name, value, extlist)
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char *name;
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char *value;
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STACK **extlist;
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{
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CONF_VALUE *vtmp = NULL;
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char *tname = NULL, *tvalue = NULL;
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if(name && !(tname = BUF_strdup(name))) goto err;
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if(value && !(tvalue = BUF_strdup(value))) goto err;;
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if(!(vtmp = (CONF_VALUE *)Malloc(sizeof(CONF_VALUE)))) goto err;
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if(!*extlist && !(*extlist = sk_new(NULL))) goto err;
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vtmp->section = NULL;
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vtmp->name = tname;
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vtmp->value = tvalue;
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if(!sk_push(*extlist, (char *)vtmp)) goto err;
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return 1;
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err:
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X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
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if(vtmp) Free(vtmp);
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if(tname) Free(tname);
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if(tvalue) Free(tvalue);
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return 0;
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}
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/* Free function for STACK of CONF_VALUE */
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void X509V3_conf_free(conf)
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CONF_VALUE *conf;
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{
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if(!conf) return;
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if(conf->name) Free(conf->name);
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if(conf->value) Free(conf->value);
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if(conf->section) Free(conf->section);
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Free((char *)conf);
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}
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int X509V3_add_value_bool(name, asn1_bool, extlist)
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char *name;
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int asn1_bool;
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STACK **extlist;
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{
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if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
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return X509V3_add_value(name, "FALSE", extlist);
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}
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int X509V3_add_value_bool_nf(name, asn1_bool, extlist)
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char *name;
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int asn1_bool;
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STACK **extlist;
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{
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if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
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return 1;
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}
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char *i2s_ASN1_ENUMERATED(method, a)
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X509V3_EXT_METHOD *method;
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ASN1_ENUMERATED *a;
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{
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BIGNUM *bntmp = NULL;
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char *strtmp = NULL;
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if(!a) return NULL;
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if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) ||
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!(strtmp = BN_bn2dec(bntmp)) )
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X509V3err(X509V3_F_I2S_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
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BN_free(bntmp);
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return strtmp;
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}
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char *i2s_ASN1_INTEGER(method, a)
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X509V3_EXT_METHOD *method;
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ASN1_INTEGER *a;
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{
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BIGNUM *bntmp = NULL;
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char *strtmp = NULL;
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if(!a) return NULL;
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if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) ||
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!(strtmp = BN_bn2dec(bntmp)) )
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X509V3err(X509V3_F_I2S_ASN1_INTEGER,ERR_R_MALLOC_FAILURE);
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BN_free(bntmp);
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return strtmp;
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}
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int X509V3_add_value_int(name, aint, extlist)
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char *name;
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ASN1_INTEGER *aint;
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STACK **extlist;
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{
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char *strtmp;
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int ret;
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if(!aint) return 1;
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if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
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ret = X509V3_add_value(name, strtmp, extlist);
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Free(strtmp);
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return ret;
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}
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int X509V3_get_value_bool(value, asn1_bool)
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CONF_VALUE *value;
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int *asn1_bool;
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{
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char *btmp;
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if(!(btmp = value->value)) goto err;
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if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true")
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|| !strcmp(btmp, "Y") || !strcmp(btmp, "y")
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|| !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) {
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*asn1_bool = 0xff;
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return 1;
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} else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false")
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|| !strcmp(btmp, "N") || !strcmp(btmp, "n")
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|| !strcmp(btmp, "NO") || !strcmp(btmp, "no")) {
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*asn1_bool = 0;
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return 1;
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}
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err:
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X509V3err(X509V3_F_X509V3_VALUE_GET_BOOL,X509V3_R_INVALID_BOOLEAN_STRING);
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X509V3_conf_err(value);
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return 0;
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}
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int X509V3_get_value_int(value, aint)
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CONF_VALUE *value;
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ASN1_INTEGER **aint;
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{
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BIGNUM *bn = NULL;
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bn = BN_new();
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if(!value->value) {
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X509V3err(X509V3_F_X509V3_GET_VALUE_INT,X509V3_R_INVALID_NULL_VALUE);
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X509V3_conf_err(value);
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return 0;
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}
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if(!BN_dec2bn(&bn, value->value)) {
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X509V3err(X509V3_F_X509V3_GET_VALUE_INT,X509V3_R_BN_DEC2BN_ERROR);
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X509V3_conf_err(value);
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return 0;
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}
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if(!(*aint = BN_to_ASN1_INTEGER(bn, NULL))) {
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X509V3err(X509V3_F_X509V3_GET_VALUE_INT,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
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X509V3_conf_err(value);
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return 0;
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}
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BN_free(bn);
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return 1;
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}
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#define HDR_NAME 1
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#define HDR_VALUE 2
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/*#define DEBUG*/
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STACK *X509V3_parse_list(line)
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char *line;
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{
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char *p, *q, c;
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char *ntmp, *vtmp;
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STACK *values = NULL;
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char *linebuf;
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int state;
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/* We are going to modify the line so copy it first */
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linebuf = BUF_strdup(line);
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state = HDR_NAME;
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ntmp = NULL;
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/* Go through all characters */
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for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) {
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switch(state) {
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case HDR_NAME:
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if(c == ':') {
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state = HDR_VALUE;
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*p = 0;
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ntmp = strip_spaces(q);
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if(!ntmp) {
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X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
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goto err;
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}
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q = p + 1;
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} else if(c == ',') {
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*p = 0;
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ntmp = strip_spaces(q);
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q = p + 1;
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#ifdef DEBUG
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printf("%s\n", ntmp);
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#endif
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if(!ntmp) {
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X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
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goto err;
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}
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X509V3_add_value(ntmp, NULL, &values);
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}
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break ;
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case HDR_VALUE:
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if(c == ',') {
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state = HDR_NAME;
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*p = 0;
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vtmp = strip_spaces(q);
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#ifdef DEBUG
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printf("%s\n", ntmp);
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#endif
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if(!vtmp) {
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X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
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goto err;
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}
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X509V3_add_value(ntmp, vtmp, &values);
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ntmp = NULL;
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q = p + 1;
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}
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}
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}
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if(state == HDR_VALUE) {
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vtmp = strip_spaces(q);
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#ifdef DEBUG
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printf("%s=%s\n", ntmp, vtmp);
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#endif
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if(!vtmp) {
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X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_VALUE);
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goto err;
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}
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X509V3_add_value(ntmp, vtmp, &values);
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} else {
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ntmp = strip_spaces(q);
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#ifdef DEBUG
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printf("%s\n", ntmp);
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#endif
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if(!ntmp) {
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X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
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goto err;
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}
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X509V3_add_value(ntmp, NULL, &values);
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}
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Free(linebuf);
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return values;
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err:
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Free(linebuf);
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sk_pop_free(values, X509V3_conf_free);
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return NULL;
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}
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/* Delete leading and trailing spaces from a string */
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static char *strip_spaces(name)
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char *name;
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{
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char *p, *q;
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/* Skip over leading spaces */
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p = name;
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while(*p && isspace(*p)) p++;
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if(!*p) return NULL;
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q = p + strlen(p) - 1;
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while((q != p) && isspace(*q)) q--;
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if(p != q) q[1] = 0;
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if(!*p) return NULL;
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return p;
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}
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/* hex string utilities */
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/* Given a buffer of length 'len' return a Malloc'ed string with its
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* hex representation
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*/
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char *hex_to_string(buffer, len)
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unsigned char *buffer;
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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 = 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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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(str, len)
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char *str;
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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 = 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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if(ch == ':') continue;
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cl = *p++;
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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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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) 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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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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/* V2I name comparison function: returns zero if 'name' matches
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* cmp or cmp.*
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*/
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int name_cmp(name, cmp)
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char *name;
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char *cmp;
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{
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int len, ret;
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char c;
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len = strlen(cmp);
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if((ret = strncmp(name, cmp, len))) return ret;
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c = name[len];
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if(!c || (c=='.')) return 0;
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return 1;
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}
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