535d79da63
the 'ca' utility. This can now be extensively customised in the configuration file and handles multibyte strings and extensions properly. This is required when extensions copying from certificate requests is supported: the user must be able to view the extensions before allowing a certificate to be issued.
535 lines
14 KiB
C
535 lines
14 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 <openssl/conf.h>
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#include <openssl/x509v3.h>
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static char *strip_spaces(char *name);
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static int sk_strcmp(const char * const *a, const char * const *b);
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static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens);
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static void str_free(void *str);
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static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
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/* Add a CONF_VALUE name value pair to stack */
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int X509V3_add_value(const char *name, const char *value,
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STACK_OF(CONF_VALUE) **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 *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
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if(!*extlist && !(*extlist = sk_CONF_VALUE_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_CONF_VALUE_push(*extlist, 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) OPENSSL_free(vtmp);
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if(tname) OPENSSL_free(tname);
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if(tvalue) OPENSSL_free(tvalue);
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return 0;
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}
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int X509V3_add_value_uchar(const char *name, const unsigned char *value,
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STACK_OF(CONF_VALUE) **extlist)
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{
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return X509V3_add_value(name,(const char *)value,extlist);
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}
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/* Free function for STACK_OF(CONF_VALUE) */
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void X509V3_conf_free(CONF_VALUE *conf)
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{
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if(!conf) return;
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if(conf->name) OPENSSL_free(conf->name);
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if(conf->value) OPENSSL_free(conf->value);
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if(conf->section) OPENSSL_free(conf->section);
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OPENSSL_free(conf);
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}
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int X509V3_add_value_bool(const char *name, int asn1_bool,
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STACK_OF(CONF_VALUE) **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(char *name, int asn1_bool,
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STACK_OF(CONF_VALUE) **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(X509V3_EXT_METHOD *method, 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(X509V3_EXT_METHOD *method, 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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ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
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{
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BIGNUM *bn = NULL;
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ASN1_INTEGER *aint;
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int isneg, ishex;
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int ret;
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bn = BN_new();
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if (!value) {
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X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
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return 0;
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}
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if (value[0] == '-') {
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value++;
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isneg = 1;
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} else isneg = 0;
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if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
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value += 2;
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ishex = 1;
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} else ishex = 0;
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if (ishex) ret = BN_hex2bn(&bn, value);
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else ret = BN_dec2bn(&bn, value);
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if (!ret) {
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X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
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return 0;
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}
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if (isneg && BN_is_zero(bn)) isneg = 0;
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aint = BN_to_ASN1_INTEGER(bn, NULL);
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BN_free(bn);
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if (!aint) {
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X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
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return 0;
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}
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if (isneg) aint->type |= V_ASN1_NEG;
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return aint;
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}
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int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
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STACK_OF(CONF_VALUE) **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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OPENSSL_free(strtmp);
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return ret;
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}
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int X509V3_get_value_bool(CONF_VALUE *value, 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_GET_VALUE_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(CONF_VALUE *value, ASN1_INTEGER **aint)
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{
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ASN1_INTEGER *itmp;
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if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
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X509V3_conf_err(value);
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return 0;
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}
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*aint = itmp;
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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_OF(CONF_VALUE) *X509V3_parse_list(const 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_OF(CONF_VALUE) *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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OPENSSL_free(linebuf);
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return values;
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err:
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OPENSSL_free(linebuf);
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sk_CONF_VALUE_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(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((unsigned char)*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((unsigned char)*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 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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/* 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(const char *name, const 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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static int sk_strcmp(const char * const *a, const char * const *b)
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{
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return strcmp(*a, *b);
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}
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STACK *X509_get1_email(X509 *x)
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{
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GENERAL_NAMES *gens;
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STACK *ret;
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gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
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ret = get_email(X509_get_subject_name(x), gens);
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sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
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return ret;
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}
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STACK *X509_REQ_get1_email(X509_REQ *x)
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{
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GENERAL_NAMES *gens;
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STACK_OF(X509_EXTENSION) *exts;
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STACK *ret;
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exts = X509_REQ_get_extensions(x);
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gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
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ret = get_email(X509_REQ_get_subject_name(x), gens);
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sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
|
|
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static STACK *get_email(X509_NAME *name, GENERAL_NAMES *gens)
|
|
{
|
|
STACK *ret = NULL;
|
|
X509_NAME_ENTRY *ne;
|
|
ASN1_IA5STRING *email;
|
|
GENERAL_NAME *gen;
|
|
int i;
|
|
/* Now add any email address(es) to STACK */
|
|
i = -1;
|
|
/* First supplied X509_NAME */
|
|
while((i = X509_NAME_get_index_by_NID(name,
|
|
NID_pkcs9_emailAddress, i)) > 0) {
|
|
ne = X509_NAME_get_entry(name, i);
|
|
email = X509_NAME_ENTRY_get_data(ne);
|
|
if(!append_ia5(&ret, email)) return NULL;
|
|
}
|
|
for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
|
|
{
|
|
gen = sk_GENERAL_NAME_value(gens, i);
|
|
if(gen->type != GEN_EMAIL) continue;
|
|
if(!append_ia5(&ret, gen->d.ia5)) return NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static void str_free(void *str)
|
|
{
|
|
OPENSSL_free(str);
|
|
}
|
|
|
|
static int append_ia5(STACK **sk, ASN1_IA5STRING *email)
|
|
{
|
|
char *emtmp;
|
|
/* First some sanity checks */
|
|
if(email->type != V_ASN1_IA5STRING) return 1;
|
|
if(!email->data || !email->length) return 1;
|
|
if(!*sk) *sk = sk_new(sk_strcmp);
|
|
if(!*sk) return 0;
|
|
/* Don't add duplicates */
|
|
if(sk_find(*sk, (char *)email->data) != -1) return 1;
|
|
emtmp = BUF_strdup((char *)email->data);
|
|
if(!emtmp || !sk_push(*sk, emtmp)) {
|
|
X509_email_free(*sk);
|
|
*sk = NULL;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
void X509_email_free(STACK *sk)
|
|
{
|
|
sk_pop_free(sk, str_free);
|
|
}
|