crypto/x509v3/v3_alt.c - boringssl - Git at Google

 /* v3_alt.c */
 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
  */
 /* ====================================================================
  * Copyright (c) 1999-2003 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in
  *    the documentation and/or other materials provided with the
  *    distribution.
  *
  * 3. All advertising materials mentioning features or use of this
  *    software must display the following acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  *
  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  *    endorse or promote products derived from this software without
  *    prior written permission. For written permission, please contact
  *    licensing@OpenSSL.org.
  *
  * 5. Products derived from this software may not be called "OpenSSL"
  *    nor may "OpenSSL" appear in their names without prior written
  *    permission of the OpenSSL Project.
  *
  * 6. Redistributions of any form whatsoever must retain the following
  *    acknowledgment:
  *    "This product includes software developed by the OpenSSL Project
  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  *
  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  * OF THE POSSIBILITY OF SUCH DAMAGE.
  * ====================================================================
  *
  * This product includes cryptographic software written by Eric Young
  * (eay@cryptsoft.com).  This product includes software written by Tim
  * Hudson (tjh@cryptsoft.com). */

 #include <stdio.h>
 #include <string.h>

 #include <openssl/conf.h>
 #include <openssl/err.h>
 #include <openssl/mem.h>
 #include <openssl/obj.h>
 #include <openssl/x509v3.h>


 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval);
 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p);
 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens);
 static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);
 static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx);

 const X509V3_EXT_METHOD v3_alt[] = {
 { NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
 0,0,0,0,
 0,0,
 (X509V3_EXT_I2V)i2v_GENERAL_NAMES,
 (X509V3_EXT_V2I)v2i_subject_alt,
 NULL, NULL, NULL},

 { NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
 0,0,0,0,
 0,0,
 (X509V3_EXT_I2V)i2v_GENERAL_NAMES,
 (X509V3_EXT_V2I)v2i_issuer_alt,
 NULL, NULL, NULL},

 { NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),
 0,0,0,0,
 0,0,
 (X509V3_EXT_I2V)i2v_GENERAL_NAMES,
 NULL, NULL, NULL, NULL},
 };

 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAMES(X509V3_EXT_METHOD *method,
 		GENERAL_NAMES *gens, STACK_OF(CONF_VALUE) *ret)
 {
 	size_t i;
 	GENERAL_NAME *gen;
 	for(i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
 		gen = sk_GENERAL_NAME_value(gens, i);
 		ret = i2v_GENERAL_NAME(method, gen, ret);
 	}
 	if(!ret) return sk_CONF_VALUE_new_null();
 	return ret;
 }

 STACK_OF(CONF_VALUE) *i2v_GENERAL_NAME(X509V3_EXT_METHOD *method,
 				GENERAL_NAME *gen, STACK_OF(CONF_VALUE) *ret)
 {
 	unsigned char *p;
 	char oline[256], htmp[5];
 	int i;
 	switch (gen->type)
 	{
 		case GEN_OTHERNAME:
 		X509V3_add_value("othername","<unsupported>", &ret);
 		break;

 		case GEN_X400:
 		X509V3_add_value("X400Name","<unsupported>", &ret);
 		break;

 		case GEN_EDIPARTY:
 		X509V3_add_value("EdiPartyName","<unsupported>", &ret);
 		break;

 		case GEN_EMAIL:
 		X509V3_add_value_uchar("email",gen->d.ia5->data, &ret);
 		break;

 		case GEN_DNS:
 		X509V3_add_value_uchar("DNS",gen->d.ia5->data, &ret);
 		break;

 		case GEN_URI:
 		X509V3_add_value_uchar("URI",gen->d.ia5->data, &ret);
 		break;

 		case GEN_DIRNAME:
 		X509_NAME_oneline(gen->d.dirn, oline, 256);
 		X509V3_add_value("DirName",oline, &ret);
 		break;

 		case GEN_IPADD:
 		p = gen->d.ip->data;
 		if(gen->d.ip->length == 4)
 			BIO_snprintf(oline, sizeof oline,
 				     "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
 		else if(gen->d.ip->length == 16)
 			{
 			oline[0] = 0;
 			for (i = 0; i < 8; i++)
 				{
 				BIO_snprintf(htmp, sizeof htmp,
 					     "%X", p[0] << 8 | p[1]);
 				p += 2;
 				strcat(oline, htmp);
 				if (i != 7)
 					strcat(oline, ":");
 				}
 			}
 		else
 			{
 			X509V3_add_value("IP Address","<invalid>", &ret);
 			break;
 			}
 		X509V3_add_value("IP Address",oline, &ret);
 		break;

 		case GEN_RID:
 		i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
 		X509V3_add_value("Registered ID",oline, &ret);
 		break;
 	}
 	return ret;
 }

 int GENERAL_NAME_print(BIO *out, GENERAL_NAME *gen)
 {
 	unsigned char *p;
 	int i;
 	switch (gen->type)
 	{
 		case GEN_OTHERNAME:
 		BIO_printf(out, "othername:<unsupported>");
 		break;

 		case GEN_X400:
 		BIO_printf(out, "X400Name:<unsupported>");
 		break;

 		case GEN_EDIPARTY:
 		/* Maybe fix this: it is supported now */
 		BIO_printf(out, "EdiPartyName:<unsupported>");
 		break;

 		case GEN_EMAIL:
 		BIO_printf(out, "email:%s",gen->d.ia5->data);
 		break;

 		case GEN_DNS:
 		BIO_printf(out, "DNS:%s",gen->d.ia5->data);
 		break;

 		case GEN_URI:
 		BIO_printf(out, "URI:%s",gen->d.ia5->data);
 		break;

 		case GEN_DIRNAME:
 		BIO_printf(out, "DirName: ");
 		X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);
 		break;

 		case GEN_IPADD:
 		p = gen->d.ip->data;
 		if(gen->d.ip->length == 4)
 			BIO_printf(out, "IP Address:%d.%d.%d.%d",
 						p[0], p[1], p[2], p[3]);
 		else if(gen->d.ip->length == 16)
 			{
 			BIO_printf(out, "IP Address");
 			for (i = 0; i < 8; i++)
 				{
 				BIO_printf(out, ":%X", p[0] << 8 | p[1]);
 				p += 2;
 				}
 			BIO_puts(out, "\n");
 			}
 		else
 			{
 			BIO_printf(out,"IP Address:<invalid>");
 			break;
 			}
 		break;

 		case GEN_RID:
 		BIO_printf(out, "Registered ID");
 		i2a_ASN1_OBJECT(out, gen->d.rid);
 		break;
 	}
 	return 1;
 }

 static GENERAL_NAMES *v2i_issuer_alt(X509V3_EXT_METHOD *method,
 				 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 {
 	GENERAL_NAMES *gens = NULL;
 	CONF_VALUE *cnf;
 	size_t i;
 	if(!(gens = sk_GENERAL_NAME_new_null())) {
 		OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 		return NULL;
 	}
 	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 		cnf = sk_CONF_VALUE_value(nval, i);
 		if(!name_cmp(cnf->name, "issuer") && cnf->value &&
 						!strcmp(cnf->value, "copy")) {
 			if(!copy_issuer(ctx, gens)) goto err;
 		} else {
 			GENERAL_NAME *gen;
 			if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
 								 goto err;
 			sk_GENERAL_NAME_push(gens, gen);
 		}
 	}
 	return gens;
 	err:
 	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 	return NULL;
 }

 /* Append subject altname of issuer to issuer alt name of subject */

 static int copy_issuer(X509V3_CTX *ctx, GENERAL_NAMES *gens)
 {
 	GENERAL_NAMES *ialt;
 	GENERAL_NAME *gen;
 	X509_EXTENSION *ext;
 	int i;
 	size_t j;
 	if(ctx && (ctx->flags == CTX_TEST)) return 1;
 	if(!ctx || !ctx->issuer_cert) {
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_DETAILS);
 		goto err;
 	}
         i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);
 	if(i < 0) return 1;
         if(!(ext = X509_get_ext(ctx->issuer_cert, i)) ||
                         !(ialt = X509V3_EXT_d2i(ext)) ) {
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_ISSUER_DECODE_ERROR);
 		goto err;
 	}

 	for(j = 0; j < sk_GENERAL_NAME_num(ialt); j++) {
 		gen = sk_GENERAL_NAME_value(ialt, j);
 		if(!sk_GENERAL_NAME_push(gens, gen)) {
 			OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 			goto err;
 		}
 	}
 	sk_GENERAL_NAME_free(ialt);

 	return 1;

 	err:
 	return 0;

 }

 static GENERAL_NAMES *v2i_subject_alt(X509V3_EXT_METHOD *method,
 				 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 {
 	GENERAL_NAMES *gens = NULL;
 	CONF_VALUE *cnf;
 	size_t i;
 	if(!(gens = sk_GENERAL_NAME_new_null())) {
 		OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 		return NULL;
 	}
 	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 		cnf = sk_CONF_VALUE_value(nval, i);
 		if(!name_cmp(cnf->name, "email") && cnf->value &&
 						!strcmp(cnf->value, "copy")) {
 			if(!copy_email(ctx, gens, 0)) goto err;
 		} else if(!name_cmp(cnf->name, "email") && cnf->value &&
 						!strcmp(cnf->value, "move")) {
 			if(!copy_email(ctx, gens, 1)) goto err;
 		} else {
 			GENERAL_NAME *gen;
 			if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
 								 goto err;
 			sk_GENERAL_NAME_push(gens, gen);
 		}
 	}
 	return gens;
 	err:
 	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 	return NULL;
 }

 /* Copy any email addresses in a certificate or request to
  * GENERAL_NAMES
  */

 static int copy_email(X509V3_CTX *ctx, GENERAL_NAMES *gens, int move_p)
 {
 	X509_NAME *nm;
 	ASN1_IA5STRING *email = NULL;
 	X509_NAME_ENTRY *ne;
 	GENERAL_NAME *gen = NULL;
 	int i;
 	if(ctx != NULL && ctx->flags == CTX_TEST)
 		return 1;
 	if(!ctx || (!ctx->subject_cert && !ctx->subject_req)) {
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_SUBJECT_DETAILS);
 		goto err;
 	}
 	/* Find the subject name */
 	if(ctx->subject_cert) nm = X509_get_subject_name(ctx->subject_cert);
 	else nm = X509_REQ_get_subject_name(ctx->subject_req);

 	/* Now add any email address(es) to STACK */
 	i = -1;
 	while((i = X509_NAME_get_index_by_NID(nm,
 					 NID_pkcs9_emailAddress, i)) >= 0) {
 		ne = X509_NAME_get_entry(nm, i);
 		email = M_ASN1_IA5STRING_dup(X509_NAME_ENTRY_get_data(ne));
                 if (move_p)
                         {
                         X509_NAME_delete_entry(nm, i);
 			X509_NAME_ENTRY_free(ne);
                         i--;
                         }
 		if(!email || !(gen = GENERAL_NAME_new())) {
 			OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 			goto err;
 		}
 		gen->d.ia5 = email;
 		email = NULL;
 		gen->type = GEN_EMAIL;
 		if(!sk_GENERAL_NAME_push(gens, gen)) {
 			OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 			goto err;
 		}
 		gen = NULL;
 	}


 	return 1;

 	err:
 	GENERAL_NAME_free(gen);
 	M_ASN1_IA5STRING_free(email);
 	return 0;

 }

 GENERAL_NAMES *v2i_GENERAL_NAMES(const X509V3_EXT_METHOD *method,
 				 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
 {
 	GENERAL_NAME *gen;
 	GENERAL_NAMES *gens = NULL;
 	CONF_VALUE *cnf;
 	size_t i;
 	if(!(gens = sk_GENERAL_NAME_new_null())) {
 		OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 		return NULL;
 	}
 	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
 		cnf = sk_CONF_VALUE_value(nval, i);
 		if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf))) goto err;
 		sk_GENERAL_NAME_push(gens, gen);
 	}
 	return gens;
 	err:
 	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
 	return NULL;
 }

 GENERAL_NAME *v2i_GENERAL_NAME(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 			       CONF_VALUE *cnf)
 	{
 	return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
 	}

 GENERAL_NAME *a2i_GENERAL_NAME(GENERAL_NAME *out,
 			       const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,
 			       int gen_type, char *value, int is_nc)
 	{
 	char is_string = 0;
 	GENERAL_NAME *gen = NULL;

 	if(!value)
 		{
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
 		return NULL;
 		}

 	if (out)
 		gen = out;
 	else
 		{
 		gen = GENERAL_NAME_new();
 		if(gen == NULL)
 			{
 			OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 			return NULL;
 			}
 		}

 	switch (gen_type)
 		{
 		case GEN_URI:
 		case GEN_EMAIL:
 		case GEN_DNS:
 		is_string = 1;
 		break;

 		case GEN_RID:
 		{
 		ASN1_OBJECT *obj;
 		if(!(obj = OBJ_txt2obj(value,0)))
 			{
 			OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_OBJECT);
 			ERR_add_error_data(2, "value=", value);
 			goto err;
 			}
 		gen->d.rid = obj;
 		}
 		break;

 		case GEN_IPADD:
 		if (is_nc)
 			gen->d.ip = a2i_IPADDRESS_NC(value);
 		else
 			gen->d.ip = a2i_IPADDRESS(value);
 		if(gen->d.ip == NULL)
 			{
 			OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_IP_ADDRESS);
 			ERR_add_error_data(2, "value=", value);
 			goto err;
 			}
 		break;

 		case GEN_DIRNAME:
 		if (!do_dirname(gen, value, ctx))
 			{
 			OPENSSL_PUT_ERROR(X509V3, X509V3_R_DIRNAME_ERROR);
 			goto err;
 			}
 		break;

 		case GEN_OTHERNAME:
 		if (!do_othername(gen, value, ctx))
 			{
 			OPENSSL_PUT_ERROR(X509V3, X509V3_R_OTHERNAME_ERROR);
 			goto err;
 			}
 		break;
 		default:
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_TYPE);
 		goto err;
 		}

 	if(is_string)
 		{
 		if(!(gen->d.ia5 = M_ASN1_IA5STRING_new()) ||
 			      !ASN1_STRING_set(gen->d.ia5, (unsigned char*)value,
 					       strlen(value)))
 			{
 			OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
 			goto err;
 			}
 		}

 	gen->type = gen_type;

 	return gen;

 	err:
 	if (!out)
 		GENERAL_NAME_free(gen);
 	return NULL;
 	}

 GENERAL_NAME *v2i_GENERAL_NAME_ex(GENERAL_NAME *out,
 				  const X509V3_EXT_METHOD *method,
 				  X509V3_CTX *ctx, CONF_VALUE *cnf, int is_nc)
 	{
 	int type;

 	char *name, *value;

 	name = cnf->name;
 	value = cnf->value;

 	if(!value)
 		{
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
 		return NULL;
 		}

 	if(!name_cmp(name, "email"))
 		type = GEN_EMAIL;
 	else if(!name_cmp(name, "URI"))
 		type = GEN_URI;
 	else if(!name_cmp(name, "DNS"))
 		type = GEN_DNS;
 	else if(!name_cmp(name, "RID"))
 		type = GEN_RID;
 	else if(!name_cmp(name, "IP"))
 		type = GEN_IPADD;
 	else if(!name_cmp(name, "dirName"))
 		type = GEN_DIRNAME;
 	else if(!name_cmp(name, "otherName"))
 		type = GEN_OTHERNAME;
 	else
 		{
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_OPTION);
 		ERR_add_error_data(2, "name=", name);
 		return NULL;
 		}

 	return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);

 	}

 static int do_othername(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)
 	{
 	char *objtmp = NULL, *p;
 	int objlen;
 	if (!(p = strchr(value, ';')))
 		return 0;
 	if (!(gen->d.otherName = OTHERNAME_new()))
 		return 0;
 	/* Free this up because we will overwrite it.
 	 * no need to free type_id because it is static
 	 */
 	ASN1_TYPE_free(gen->d.otherName->value);
 	if (!(gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)))
 		return 0;
 	objlen = p - value;
 	objtmp = OPENSSL_malloc(objlen + 1);
 	if (objtmp == NULL)
 		return 0;
 	strncpy(objtmp, value, objlen);
 	objtmp[objlen] = 0;
 	gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);
 	OPENSSL_free(objtmp);
 	if (!gen->d.otherName->type_id)
 		return 0;
 	return 1;
 	}

 static int do_dirname(GENERAL_NAME *gen, char *value, X509V3_CTX *ctx)
 	{
 	int ret = 0;
 	STACK_OF(CONF_VALUE) *sk = NULL;
 	X509_NAME *nm = X509_NAME_new();
 	if (nm == NULL)
 		goto err;
 	sk = X509V3_get_section(ctx, value);
 	if (sk == NULL)
 		{
 		OPENSSL_PUT_ERROR(X509V3, X509V3_R_SECTION_NOT_FOUND);
 		ERR_add_error_data(2, "section=", value);
 		goto err;
 		}
 	/* FIXME: should allow other character types... */
 	if (!X509V3_NAME_from_section(nm, sk, MBSTRING_ASC))
 		goto err;
 	gen->d.dirn = nm;
 	ret = 1;

 err:
 	if (!ret)
 		X509_NAME_free(nm);
 	X509V3_section_free(ctx, sk);
 	return ret;
 	}
	/* v3_alt.c */
	/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
	* project.
	*/
	/* ====================================================================
	* Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	*
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in
	* the documentation and/or other materials provided with the
	* distribution.
	*
	* 3. All advertising materials mentioning features or use of this
	* software must display the following acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	*
	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	* endorse or promote products derived from this software without
	* prior written permission. For written permission, please contact
	* licensing@OpenSSL.org.
	*
	* 5. Products derived from this software may not be called "OpenSSL"
	* nor may "OpenSSL" appear in their names without prior written
	* permission of the OpenSSL Project.
	*
	* 6. Redistributions of any form whatsoever must retain the following
	* acknowledgment:
	* "This product includes software developed by the OpenSSL Project
	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	*
	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	* OF THE POSSIBILITY OF SUCH DAMAGE.
	* ====================================================================
	*
	* This product includes cryptographic software written by Eric Young
	* (eay@cryptsoft.com). This product includes software written by Tim
	* Hudson (tjh@cryptsoft.com). */

	#include <stdio.h>
	#include <string.h>

	#include <openssl/conf.h>
	#include <openssl/err.h>
	#include <openssl/mem.h>
	#include <openssl/obj.h>
	#include <openssl/x509v3.h>


	static GENERAL_NAMES v2i_subject_alt(X509V3_EXT_METHOD method, X509V3_CTX ctx, STACK_OF(CONF_VALUE) nval);
	static GENERAL_NAMES v2i_issuer_alt(X509V3_EXT_METHOD method, X509V3_CTX ctx, STACK_OF(CONF_VALUE) nval);
	static int copy_email(X509V3_CTX ctx, GENERAL_NAMES gens, int move_p);
	static int copy_issuer(X509V3_CTX ctx, GENERAL_NAMES gens);
	static int do_othername(GENERAL_NAME gen, char value, X509V3_CTX *ctx);
	static int do_dirname(GENERAL_NAME gen, char value, X509V3_CTX *ctx);

	const X509V3_EXT_METHOD v3_alt[] = {
	{ NID_subject_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
	0,0,0,0,
	0,0,
	(X509V3_EXT_I2V)i2v_GENERAL_NAMES,
	(X509V3_EXT_V2I)v2i_subject_alt,
	NULL, NULL, NULL},

	{ NID_issuer_alt_name, 0, ASN1_ITEM_ref(GENERAL_NAMES),
	0,0,0,0,
	0,0,
	(X509V3_EXT_I2V)i2v_GENERAL_NAMES,
	(X509V3_EXT_V2I)v2i_issuer_alt,
	NULL, NULL, NULL},

	{ NID_certificate_issuer, 0, ASN1_ITEM_ref(GENERAL_NAMES),
	0,0,0,0,
	0,0,
	(X509V3_EXT_I2V)i2v_GENERAL_NAMES,
	NULL, NULL, NULL, NULL},
	};

	STACK_OF(CONF_VALUE) i2v_GENERAL_NAMES(X509V3_EXT_METHOD method,
	GENERAL_NAMES gens, STACK_OF(CONF_VALUE) ret)
	{
	size_t i;
	GENERAL_NAME *gen;
	for(i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
	gen = sk_GENERAL_NAME_value(gens, i);
	ret = i2v_GENERAL_NAME(method, gen, ret);
	}
	if(!ret) return sk_CONF_VALUE_new_null();
	return ret;
	}

	STACK_OF(CONF_VALUE) i2v_GENERAL_NAME(X509V3_EXT_METHOD method,
	GENERAL_NAME gen, STACK_OF(CONF_VALUE) ret)
	{
	unsigned char *p;
	char oline[256], htmp[5];
	int i;
	switch (gen->type)
	{
	case GEN_OTHERNAME:
	X509V3_add_value("othername","<unsupported>", &ret);
	break;

	case GEN_X400:
	X509V3_add_value("X400Name","<unsupported>", &ret);
	break;

	case GEN_EDIPARTY:
	X509V3_add_value("EdiPartyName","<unsupported>", &ret);
	break;

	case GEN_EMAIL:
	X509V3_add_value_uchar("email",gen->d.ia5->data, &ret);
	break;

	case GEN_DNS:
	X509V3_add_value_uchar("DNS",gen->d.ia5->data, &ret);
	break;

	case GEN_URI:
	X509V3_add_value_uchar("URI",gen->d.ia5->data, &ret);
	break;

	case GEN_DIRNAME:
	X509_NAME_oneline(gen->d.dirn, oline, 256);
	X509V3_add_value("DirName",oline, &ret);
	break;

	case GEN_IPADD:
	p = gen->d.ip->data;
	if(gen->d.ip->length == 4)
	BIO_snprintf(oline, sizeof oline,
	"%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
	else if(gen->d.ip->length == 16)
	{
	oline[0] = 0;
	for (i = 0; i < 8; i++)
	{
	BIO_snprintf(htmp, sizeof htmp,
	"%X", p[0] << 8 \| p[1]);
	p += 2;
	strcat(oline, htmp);
	if (i != 7)
	strcat(oline, ":");
	}
	}
	else
	{
	X509V3_add_value("IP Address","<invalid>", &ret);
	break;
	}
	X509V3_add_value("IP Address",oline, &ret);
	break;

	case GEN_RID:
	i2t_ASN1_OBJECT(oline, 256, gen->d.rid);
	X509V3_add_value("Registered ID",oline, &ret);
	break;
	}
	return ret;
	}

	int GENERAL_NAME_print(BIO out, GENERAL_NAME gen)
	{
	unsigned char *p;
	int i;
	switch (gen->type)
	{
	case GEN_OTHERNAME:
	BIO_printf(out, "othername:<unsupported>");
	break;

	case GEN_X400:
	BIO_printf(out, "X400Name:<unsupported>");
	break;

	case GEN_EDIPARTY:
	/* Maybe fix this: it is supported now */
	BIO_printf(out, "EdiPartyName:<unsupported>");
	break;

	case GEN_EMAIL:
	BIO_printf(out, "email:%s",gen->d.ia5->data);
	break;

	case GEN_DNS:
	BIO_printf(out, "DNS:%s",gen->d.ia5->data);
	break;

	case GEN_URI:
	BIO_printf(out, "URI:%s",gen->d.ia5->data);
	break;

	case GEN_DIRNAME:
	BIO_printf(out, "DirName: ");
	X509_NAME_print_ex(out, gen->d.dirn, 0, XN_FLAG_ONELINE);
	break;

	case GEN_IPADD:
	p = gen->d.ip->data;
	if(gen->d.ip->length == 4)
	BIO_printf(out, "IP Address:%d.%d.%d.%d",
	p[0], p[1], p[2], p[3]);
	else if(gen->d.ip->length == 16)
	{
	BIO_printf(out, "IP Address");
	for (i = 0; i < 8; i++)
	{
	BIO_printf(out, ":%X", p[0] << 8 \| p[1]);
	p += 2;
	}
	BIO_puts(out, "\n");
	}
	else
	{
	BIO_printf(out,"IP Address:<invalid>");
	break;
	}
	break;

	case GEN_RID:
	BIO_printf(out, "Registered ID");
	i2a_ASN1_OBJECT(out, gen->d.rid);
	break;
	}
	return 1;
	}

	static GENERAL_NAMES v2i_issuer_alt(X509V3_EXT_METHOD method,
	X509V3_CTX ctx, STACK_OF(CONF_VALUE) nval)
	{
	GENERAL_NAMES *gens = NULL;
	CONF_VALUE *cnf;
	size_t i;
	if(!(gens = sk_GENERAL_NAME_new_null())) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	return NULL;
	}
	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
	cnf = sk_CONF_VALUE_value(nval, i);
	if(!name_cmp(cnf->name, "issuer") && cnf->value &&
	!strcmp(cnf->value, "copy")) {
	if(!copy_issuer(ctx, gens)) goto err;
	} else {
	GENERAL_NAME *gen;
	if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
	goto err;
	sk_GENERAL_NAME_push(gens, gen);
	}
	}
	return gens;
	err:
	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
	return NULL;
	}

	/* Append subject altname of issuer to issuer alt name of subject */

	static int copy_issuer(X509V3_CTX ctx, GENERAL_NAMES gens)
	{
	GENERAL_NAMES *ialt;
	GENERAL_NAME *gen;
	X509_EXTENSION *ext;
	int i;
	size_t j;
	if(ctx && (ctx->flags == CTX_TEST)) return 1;
	if(!ctx \|\| !ctx->issuer_cert) {
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_ISSUER_DETAILS);
	goto err;
	}
	i = X509_get_ext_by_NID(ctx->issuer_cert, NID_subject_alt_name, -1);
	if(i < 0) return 1;
	if(!(ext = X509_get_ext(ctx->issuer_cert, i)) \|\|
	!(ialt = X509V3_EXT_d2i(ext)) ) {
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_ISSUER_DECODE_ERROR);
	goto err;
	}

	for(j = 0; j < sk_GENERAL_NAME_num(ialt); j++) {
	gen = sk_GENERAL_NAME_value(ialt, j);
	if(!sk_GENERAL_NAME_push(gens, gen)) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	goto err;
	}
	}
	sk_GENERAL_NAME_free(ialt);

	return 1;

	err:
	return 0;

	}

	static GENERAL_NAMES v2i_subject_alt(X509V3_EXT_METHOD method,
	X509V3_CTX ctx, STACK_OF(CONF_VALUE) nval)
	{
	GENERAL_NAMES *gens = NULL;
	CONF_VALUE *cnf;
	size_t i;
	if(!(gens = sk_GENERAL_NAME_new_null())) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	return NULL;
	}
	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
	cnf = sk_CONF_VALUE_value(nval, i);
	if(!name_cmp(cnf->name, "email") && cnf->value &&
	!strcmp(cnf->value, "copy")) {
	if(!copy_email(ctx, gens, 0)) goto err;
	} else if(!name_cmp(cnf->name, "email") && cnf->value &&
	!strcmp(cnf->value, "move")) {
	if(!copy_email(ctx, gens, 1)) goto err;
	} else {
	GENERAL_NAME *gen;
	if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf)))
	goto err;
	sk_GENERAL_NAME_push(gens, gen);
	}
	}
	return gens;
	err:
	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
	return NULL;
	}

	/* Copy any email addresses in a certificate or request to
	* GENERAL_NAMES
	*/

	static int copy_email(X509V3_CTX ctx, GENERAL_NAMES gens, int move_p)
	{
	X509_NAME *nm;
	ASN1_IA5STRING *email = NULL;
	X509_NAME_ENTRY *ne;
	GENERAL_NAME *gen = NULL;
	int i;
	if(ctx != NULL && ctx->flags == CTX_TEST)
	return 1;
	if(!ctx \|\| (!ctx->subject_cert && !ctx->subject_req)) {
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_NO_SUBJECT_DETAILS);
	goto err;
	}
	/* Find the subject name */
	if(ctx->subject_cert) nm = X509_get_subject_name(ctx->subject_cert);
	else nm = X509_REQ_get_subject_name(ctx->subject_req);

	/* Now add any email address(es) to STACK */
	i = -1;
	while((i = X509_NAME_get_index_by_NID(nm,
	NID_pkcs9_emailAddress, i)) >= 0) {
	ne = X509_NAME_get_entry(nm, i);
	email = M_ASN1_IA5STRING_dup(X509_NAME_ENTRY_get_data(ne));
	if (move_p)
	{
	X509_NAME_delete_entry(nm, i);
	X509_NAME_ENTRY_free(ne);
	i--;
	}
	if(!email \|\| !(gen = GENERAL_NAME_new())) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	goto err;
	}
	gen->d.ia5 = email;
	email = NULL;
	gen->type = GEN_EMAIL;
	if(!sk_GENERAL_NAME_push(gens, gen)) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	goto err;
	}
	gen = NULL;
	}


	return 1;

	err:
	GENERAL_NAME_free(gen);
	M_ASN1_IA5STRING_free(email);
	return 0;

	}

	GENERAL_NAMES v2i_GENERAL_NAMES(const X509V3_EXT_METHOD method,
	X509V3_CTX ctx, STACK_OF(CONF_VALUE) nval)
	{
	GENERAL_NAME *gen;
	GENERAL_NAMES *gens = NULL;
	CONF_VALUE *cnf;
	size_t i;
	if(!(gens = sk_GENERAL_NAME_new_null())) {
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	return NULL;
	}
	for(i = 0; i < sk_CONF_VALUE_num(nval); i++) {
	cnf = sk_CONF_VALUE_value(nval, i);
	if(!(gen = v2i_GENERAL_NAME(method, ctx, cnf))) goto err;
	sk_GENERAL_NAME_push(gens, gen);
	}
	return gens;
	err:
	sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
	return NULL;
	}

	GENERAL_NAME v2i_GENERAL_NAME(const X509V3_EXT_METHOD method, X509V3_CTX *ctx,
	CONF_VALUE *cnf)
	{
	return v2i_GENERAL_NAME_ex(NULL, method, ctx, cnf, 0);
	}

	GENERAL_NAME a2i_GENERAL_NAME(GENERAL_NAME out,
	const X509V3_EXT_METHOD method, X509V3_CTX ctx,
	int gen_type, char *value, int is_nc)
	{
	char is_string = 0;
	GENERAL_NAME *gen = NULL;

	if(!value)
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
	return NULL;
	}

	if (out)
	gen = out;
	else
	{
	gen = GENERAL_NAME_new();
	if(gen == NULL)
	{
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	return NULL;
	}
	}

	switch (gen_type)
	{
	case GEN_URI:
	case GEN_EMAIL:
	case GEN_DNS:
	is_string = 1;
	break;

	case GEN_RID:
	{
	ASN1_OBJECT *obj;
	if(!(obj = OBJ_txt2obj(value,0)))
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_OBJECT);
	ERR_add_error_data(2, "value=", value);
	goto err;
	}
	gen->d.rid = obj;
	}
	break;

	case GEN_IPADD:
	if (is_nc)
	gen->d.ip = a2i_IPADDRESS_NC(value);
	else
	gen->d.ip = a2i_IPADDRESS(value);
	if(gen->d.ip == NULL)
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_BAD_IP_ADDRESS);
	ERR_add_error_data(2, "value=", value);
	goto err;
	}
	break;

	case GEN_DIRNAME:
	if (!do_dirname(gen, value, ctx))
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_DIRNAME_ERROR);
	goto err;
	}
	break;

	case GEN_OTHERNAME:
	if (!do_othername(gen, value, ctx))
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_OTHERNAME_ERROR);
	goto err;
	}
	break;
	default:
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_TYPE);
	goto err;
	}

	if(is_string)
	{
	if(!(gen->d.ia5 = M_ASN1_IA5STRING_new()) \|\|
	!ASN1_STRING_set(gen->d.ia5, (unsigned char*)value,
	strlen(value)))
	{
	OPENSSL_PUT_ERROR(X509V3, ERR_R_MALLOC_FAILURE);
	goto err;
	}
	}

	gen->type = gen_type;

	return gen;

	err:
	if (!out)
	GENERAL_NAME_free(gen);
	return NULL;
	}

	GENERAL_NAME v2i_GENERAL_NAME_ex(GENERAL_NAME out,
	const X509V3_EXT_METHOD *method,
	X509V3_CTX ctx, CONF_VALUE cnf, int is_nc)
	{
	int type;

	char name, value;

	name = cnf->name;
	value = cnf->value;

	if(!value)
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_MISSING_VALUE);
	return NULL;
	}

	if(!name_cmp(name, "email"))
	type = GEN_EMAIL;
	else if(!name_cmp(name, "URI"))
	type = GEN_URI;
	else if(!name_cmp(name, "DNS"))
	type = GEN_DNS;
	else if(!name_cmp(name, "RID"))
	type = GEN_RID;
	else if(!name_cmp(name, "IP"))
	type = GEN_IPADD;
	else if(!name_cmp(name, "dirName"))
	type = GEN_DIRNAME;
	else if(!name_cmp(name, "otherName"))
	type = GEN_OTHERNAME;
	else
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_UNSUPPORTED_OPTION);
	ERR_add_error_data(2, "name=", name);
	return NULL;
	}

	return a2i_GENERAL_NAME(out, method, ctx, type, value, is_nc);

	}

	static int do_othername(GENERAL_NAME gen, char value, X509V3_CTX *ctx)
	{
	char objtmp = NULL, p;
	int objlen;
	if (!(p = strchr(value, ';')))
	return 0;
	if (!(gen->d.otherName = OTHERNAME_new()))
	return 0;
	/* Free this up because we will overwrite it.
	* no need to free type_id because it is static
	*/
	ASN1_TYPE_free(gen->d.otherName->value);
	if (!(gen->d.otherName->value = ASN1_generate_v3(p + 1, ctx)))
	return 0;
	objlen = p - value;
	objtmp = OPENSSL_malloc(objlen + 1);
	if (objtmp == NULL)
	return 0;
	strncpy(objtmp, value, objlen);
	objtmp[objlen] = 0;
	gen->d.otherName->type_id = OBJ_txt2obj(objtmp, 0);
	OPENSSL_free(objtmp);
	if (!gen->d.otherName->type_id)
	return 0;
	return 1;
	}

	static int do_dirname(GENERAL_NAME gen, char value, X509V3_CTX *ctx)
	{
	int ret = 0;
	STACK_OF(CONF_VALUE) *sk = NULL;
	X509_NAME *nm = X509_NAME_new();
	if (nm == NULL)
	goto err;
	sk = X509V3_get_section(ctx, value);
	if (sk == NULL)
	{
	OPENSSL_PUT_ERROR(X509V3, X509V3_R_SECTION_NOT_FOUND);
	ERR_add_error_data(2, "section=", value);
	goto err;
	}
	/* FIXME: should allow other character types... */
	if (!X509V3_NAME_from_section(nm, sk, MBSTRING_ASC))
	goto err;
	gen->d.dirn = nm;
	ret = 1;

	err:
	if (!ret)
	X509_NAME_free(nm);
	X509V3_section_free(ctx, sk);
	return ret;
	}