/* crypto/x509/x509_lu.c */

 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)

  * All rights reserved.

  *

  * This package is an SSL implementation written

  * by Eric Young (eay@cryptsoft.com).

  * The implementation was written so as to conform with Netscapes SSL.

  * 

  * This library is free for commercial and non-commercial use as long as

  * the following conditions are aheared to.  The following conditions

  * apply to all code found in this distribution, be it the RC4, RSA,

  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation

  * included with this distribution is covered by the same copyright terms

  * except that the holder is Tim Hudson (tjh@cryptsoft.com).

  * 

  * Copyright remains Eric Young's, and as such any Copyright notices in

  * the code are not to be removed.

  * If this package is used in a product, Eric Young should be given attribution

  * as the author of the parts of the library used.

  * This can be in the form of a textual message at program startup or

  * in documentation (online or textual) provided with the package.

  * 

  * 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 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 acknowledgement:

  *    "This product includes cryptographic software written by

  *     Eric Young (eay@cryptsoft.com)"

  *    The word 'cryptographic' can be left out if the rouines from the library

  *    being used are not cryptographic related :-).

  * 4. If you include any Windows specific code (or a derivative thereof) from 

  *    the apps directory (application code) you must include an acknowledgement:

  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"

  * 

  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND

  * ANY EXPRESS 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 AUTHOR OR 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.

  * 

  * The licence and distribution terms for any publically available version or

  * derivative of this code cannot be changed.  i.e. this code cannot simply be

  * copied and put under another distribution licence

  * [including the GNU Public Licence.]

  */

 #include <stdio.h>

 #include "cryptlib.h"

 #include <openssl/lhash.h>

 #include <openssl/x509.h>

 #include <openssl/x509v3.h>

 EXPORT_C X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method)

 	{

 	X509_LOOKUP *ret;

 	ret=(X509_LOOKUP *)OPENSSL_malloc(sizeof(X509_LOOKUP));

 	if (ret == NULL) return NULL;

 	ret->init=0;

 	ret->skip=0;

 	ret->method=method;

 	ret->method_data=NULL;

 	ret->store_ctx=NULL;

 	if ((method->new_item != NULL) && !method->new_item(ret))

 		{

 		OPENSSL_free(ret);

 		return NULL;

 		}

 	return ret;

 	}

 EXPORT_C void X509_LOOKUP_free(X509_LOOKUP *ctx)

 	{

 	if (ctx == NULL) return;

 	if (	(ctx->method != NULL) &&

 		(ctx->method->free != NULL))

 		ctx->method->free(ctx);

 	OPENSSL_free(ctx);

 	}

 EXPORT_C int X509_LOOKUP_init(X509_LOOKUP *ctx)

 	{

 	if (ctx->method == NULL) return 0;

 	if (ctx->method->init != NULL)

 		return ctx->method->init(ctx);

 	else

 		return 1;

 	}

 EXPORT_C int X509_LOOKUP_shutdown(X509_LOOKUP *ctx)

 	{

 	if (ctx->method == NULL) return 0;

 	if (ctx->method->shutdown != NULL)

 		return ctx->method->shutdown(ctx);

 	else

 		return 1;

 	}

 EXPORT_C int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,

 	     char **ret)

 	{

 	if (ctx->method == NULL) return -1;

 	if (ctx->method->ctrl != NULL)

 		return ctx->method->ctrl(ctx,cmd,argc,argl,ret);

 	else

 		return 1;

 	}

 EXPORT_C int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, int type, X509_NAME *name,

 	     X509_OBJECT *ret)

 	{

 	if ((ctx->method == NULL) || (ctx->method->get_by_subject == NULL))

 		return X509_LU_FAIL;

 	if (ctx->skip) return 0;

 	return ctx->method->get_by_subject(ctx,type,name,ret);

 	}

 EXPORT_C int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, int type, X509_NAME *name,

 	     ASN1_INTEGER *serial, X509_OBJECT *ret)

 	{

 	if ((ctx->method == NULL) ||

 		(ctx->method->get_by_issuer_serial == NULL))

 		return X509_LU_FAIL;

 	return ctx->method->get_by_issuer_serial(ctx,type,name,serial,ret);

 	}

 EXPORT_C int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, int type,

 	     unsigned char *bytes, int len, X509_OBJECT *ret)

 	{

 	if ((ctx->method == NULL) || (ctx->method->get_by_fingerprint == NULL))

 		return X509_LU_FAIL;

 	return ctx->method->get_by_fingerprint(ctx,type,bytes,len,ret);

 	}

 EXPORT_C int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, int type, char *str, int len,

 	     X509_OBJECT *ret)

 	{

 	if ((ctx->method == NULL) || (ctx->method->get_by_alias == NULL))

 		return X509_LU_FAIL;

 	return ctx->method->get_by_alias(ctx,type,str,len,ret);

 	}

 static int x509_object_cmp(const X509_OBJECT * const *a, const X509_OBJECT * const *b)

   	{

  	int ret;

  	ret=((*a)->type - (*b)->type);

  	if (ret) return ret;

  	switch ((*a)->type)

  		{

  	case X509_LU_X509:

  		ret=X509_subject_name_cmp((*a)->data.x509,(*b)->data.x509);

  		break;

  	case X509_LU_CRL:

  		ret=X509_CRL_cmp((*a)->data.crl,(*b)->data.crl);

  		break;

 	default:

 		/* abort(); */

 		return 0;

 		}

 	return ret;

 	}

 EXPORT_C X509_STORE *X509_STORE_new(void)

 	{

 	X509_STORE *ret;

 	if ((ret=(X509_STORE *)OPENSSL_malloc(sizeof(X509_STORE))) == NULL)

 		return NULL;

 	ret->objs = sk_X509_OBJECT_new(x509_object_cmp);

 	ret->cache=1;

 	ret->get_cert_methods=sk_X509_LOOKUP_new_null();

 	ret->verify=0;

 	ret->verify_cb=0;

 	if ((ret->param = X509_VERIFY_PARAM_new()) == NULL)

 		return NULL;

 	ret->get_issuer = 0;

 	ret->check_issued = 0;

 	ret->check_revocation = 0;

 	ret->get_crl = 0;

 	ret->check_crl = 0;

 	ret->cert_crl = 0;

 	ret->cleanup = 0;

 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509_STORE, ret, &ret->ex_data);

 	ret->references=1;

 	return ret;

 	}

 static void cleanup(X509_OBJECT *a)

 	{

 	if (a->type == X509_LU_X509)

 		{

 		X509_free(a->data.x509);

 		}

 	else if (a->type == X509_LU_CRL)

 		{

 		X509_CRL_free(a->data.crl);

 		}

 	else

 		{

 		/* abort(); */

 		}

 	OPENSSL_free(a);

 	}

 EXPORT_C void X509_STORE_free(X509_STORE *vfy)

 	{

 	int i;

 	STACK_OF(X509_LOOKUP) *sk;

 	X509_LOOKUP *lu;

 	if (vfy == NULL)

 	    return;

 	sk=vfy->get_cert_methods;

 	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)

 		{

 		lu=sk_X509_LOOKUP_value(sk,i);

 		X509_LOOKUP_shutdown(lu);

 		X509_LOOKUP_free(lu);

 		}

 	sk_X509_LOOKUP_free(sk);

 	sk_X509_OBJECT_pop_free(vfy->objs, cleanup);

 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509_STORE, vfy, &vfy->ex_data);

 	if (vfy->param)

 		X509_VERIFY_PARAM_free(vfy->param);

 	OPENSSL_free(vfy);

 	}

 EXPORT_C X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m)

 	{

 	int i;

 	STACK_OF(X509_LOOKUP) *sk;

 	X509_LOOKUP *lu;

 	sk=v->get_cert_methods;

 	for (i=0; i<sk_X509_LOOKUP_num(sk); i++)

 		{

 		lu=sk_X509_LOOKUP_value(sk,i);

 		if (m == lu->method)

 			{

 			return lu;

 			}

 		}

 	/* a new one */

 	lu=X509_LOOKUP_new(m);

 	if (lu == NULL)

 		return NULL;

 	else

 		{

 		lu->store_ctx=v;

 		if (sk_X509_LOOKUP_push(v->get_cert_methods,lu))

 			return lu;

 		else

 			{

 			X509_LOOKUP_free(lu);

 			return NULL;

 			}

 		}

 	}

 EXPORT_C int X509_STORE_get_by_subject(X509_STORE_CTX *vs, int type, X509_NAME *name,

 	     X509_OBJECT *ret)

 	{

 	X509_STORE *ctx=vs->ctx;

 	X509_LOOKUP *lu;

 	X509_OBJECT stmp,*tmp;

 	int i,j;

 	tmp=X509_OBJECT_retrieve_by_subject(ctx->objs,type,name);

 	if (tmp == NULL)

 		{

 		for (i=vs->current_method; i<sk_X509_LOOKUP_num(ctx->get_cert_methods); i++)

 			{

 			lu=sk_X509_LOOKUP_value(ctx->get_cert_methods,i);

 			j=X509_LOOKUP_by_subject(lu,type,name,&stmp);

 			if (j < 0)

 				{

 				vs->current_method=j;

 				return j;

 				}

 			else if (j)

 				{

 				tmp= &stmp;

 				break;

 				}

 			}

 		vs->current_method=0;

 		if (tmp == NULL)

 			return 0;

 		}

 /*	if (ret->data.ptr != NULL)

 		X509_OBJECT_free_contents(ret); */

 	ret->type=tmp->type;

 	ret->data.ptr=tmp->data.ptr;

 	X509_OBJECT_up_ref_count(ret);

 	return 1;

 	}

 EXPORT_C int X509_STORE_add_cert(X509_STORE *ctx, X509 *x)

 	{

 	X509_OBJECT *obj;

 	int ret=1;

 	if (x == NULL) return 0;

 	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));

 	if (obj == NULL)

 		{

 		X509err(X509_F_X509_STORE_ADD_CERT,ERR_R_MALLOC_FAILURE);

 		return 0;

 		}

 	obj->type=X509_LU_X509;

 	obj->data.x509=x;

 	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);

 	X509_OBJECT_up_ref_count(obj);

 	if (X509_OBJECT_retrieve_match(ctx->objs, obj))

 		{

 		X509_OBJECT_free_contents(obj);

 		OPENSSL_free(obj);

 		X509err(X509_F_X509_STORE_ADD_CERT,X509_R_CERT_ALREADY_IN_HASH_TABLE);

 		ret=0;

 		} 

 	else sk_X509_OBJECT_push(ctx->objs, obj);

 	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);

 	return ret;

 	}

 EXPORT_C int X509_STORE_add_crl(X509_STORE *ctx, X509_CRL *x)

 	{

 	X509_OBJECT *obj;

 	int ret=1;

 	if (x == NULL) return 0;

 	obj=(X509_OBJECT *)OPENSSL_malloc(sizeof(X509_OBJECT));

 	if (obj == NULL)

 		{

 		X509err(X509_F_X509_STORE_ADD_CRL,ERR_R_MALLOC_FAILURE);

 		return 0;

 		}

 	obj->type=X509_LU_CRL;

 	obj->data.crl=x;

 	CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);

 	X509_OBJECT_up_ref_count(obj);

 	if (X509_OBJECT_retrieve_match(ctx->objs, obj))

 		{

 		X509_OBJECT_free_contents(obj);

 		OPENSSL_free(obj);

 		X509err(X509_F_X509_STORE_ADD_CRL,X509_R_CERT_ALREADY_IN_HASH_TABLE);

 		ret=0;

 		}

 	else sk_X509_OBJECT_push(ctx->objs, obj);

 	CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);

 	return ret;

 	}

 EXPORT_C void X509_OBJECT_up_ref_count(X509_OBJECT *a)

 	{

 	switch (a->type)

 		{

 	case X509_LU_X509:

 		CRYPTO_add(&a->data.x509->references,1,CRYPTO_LOCK_X509);

 		break;

 	case X509_LU_CRL:

 		CRYPTO_add(&a->data.crl->references,1,CRYPTO_LOCK_X509_CRL);

 		break;

 		}

 	}

 EXPORT_C void X509_OBJECT_free_contents(X509_OBJECT *a)

 	{

 	switch (a->type)

 		{

 	case X509_LU_X509:

 		X509_free(a->data.x509);

 		break;

 	case X509_LU_CRL:

 		X509_CRL_free(a->data.crl);

 		break;

 		}

 	}

 EXPORT_C int X509_OBJECT_idx_by_subject(STACK_OF(X509_OBJECT) *h, int type,

 	     X509_NAME *name)

 	{

 	X509_OBJECT stmp;

 	X509 x509_s;

 	X509_CINF cinf_s;

 	X509_CRL crl_s;

 	X509_CRL_INFO crl_info_s;

 	stmp.type=type;

 	switch (type)

 		{

 	case X509_LU_X509:

 		stmp.data.x509= &x509_s;

 		x509_s.cert_info= &cinf_s;

 		cinf_s.subject=name;

 		break;

 	case X509_LU_CRL:

 		stmp.data.crl= &crl_s;

 		crl_s.crl= &crl_info_s;

 		crl_info_s.issuer=name;

 		break;

 	default:

 		/* abort(); */

 		return -1;

 		}

 	return sk_X509_OBJECT_find(h,&stmp);

 	}

 EXPORT_C X509_OBJECT *X509_OBJECT_retrieve_by_subject(STACK_OF(X509_OBJECT) *h, int type,

 	     X509_NAME *name)

 {

 	int idx;

 	idx = X509_OBJECT_idx_by_subject(h, type, name);

 	if (idx==-1) return NULL;

 	return sk_X509_OBJECT_value(h, idx);

 }

 EXPORT_C X509_OBJECT *X509_OBJECT_retrieve_match(STACK_OF(X509_OBJECT) *h, X509_OBJECT *x)

 {

 	int idx, i;

 	X509_OBJECT *obj;

 	idx = sk_X509_OBJECT_find(h, x);

 	if (idx == -1) return NULL;

 	if (x->type != X509_LU_X509) return sk_X509_OBJECT_value(h, idx);

 	for (i = idx; i < sk_X509_OBJECT_num(h); i++)

 		{

 		obj = sk_X509_OBJECT_value(h, i);

 		if (x509_object_cmp((const X509_OBJECT **)&obj, (const X509_OBJECT **)&x))

 			return NULL;

 		if ((x->type != X509_LU_X509) || !X509_cmp(obj->data.x509, x->data.x509))

 			return obj;

 		}

 	return NULL;

 }

 /* Try to get issuer certificate from store. Due to limitations

  * of the API this can only retrieve a single certificate matching

  * a given subject name. However it will fill the cache with all

  * matching certificates, so we can examine the cache for all 

  * matches.

  *

  * Return values are:

  *  1 lookup successful.

  *  0 certificate not found.

  * -1 some other error.

  */

 EXPORT_C int X509_STORE_CTX_get1_issuer(X509 **issuer, X509_STORE_CTX *ctx, X509 *x)

 {

 	X509_NAME *xn;

 	X509_OBJECT obj, *pobj;

 	int i, ok, idx;

 	xn=X509_get_issuer_name(x);

 	ok=X509_STORE_get_by_subject(ctx,X509_LU_X509,xn,&obj);

 	if (ok != X509_LU_X509)

 		{

 		if (ok == X509_LU_RETRY)

 			{

 			X509_OBJECT_free_contents(&obj);

 			X509err(X509_F_X509_STORE_CTX_GET1_ISSUER,X509_R_SHOULD_RETRY);

 			return -1;

 			}

 		else if (ok != X509_LU_FAIL)

 			{

 			X509_OBJECT_free_contents(&obj);

 			/* not good :-(, break anyway */

 			return -1;

 			}

 		return 0;

 		}

 	/* If certificate matches all OK */

 	if (ctx->check_issued(ctx, x, obj.data.x509))

 		{

 		*issuer = obj.data.x509;

 		return 1;

 		}

 	X509_OBJECT_free_contents(&obj);

 	/* Else find index of first matching cert */

 	idx = X509_OBJECT_idx_by_subject(ctx->ctx->objs, X509_LU_X509, xn);

 	/* This shouldn't normally happen since we already have one match */

 	if (idx == -1) return 0;

 	/* Look through all matching certificates for a suitable issuer */

 	for (i = idx; i < sk_X509_OBJECT_num(ctx->ctx->objs); i++)

 		{

 		pobj = sk_X509_OBJECT_value(ctx->ctx->objs, i);

 		/* See if we've ran out of matches */

 		if (pobj->type != X509_LU_X509) return 0;

 		if (X509_NAME_cmp(xn, X509_get_subject_name(pobj->data.x509))) return 0;

 		if (ctx->check_issued(ctx, x, pobj->data.x509))

 			{

 			*issuer = pobj->data.x509;

 			X509_OBJECT_up_ref_count(pobj);

 			return 1;

 			}

 		}

 	return 0;

 }

 EXPORT_C int X509_STORE_set_flags(X509_STORE *ctx, unsigned long flags)

 	{

 	return X509_VERIFY_PARAM_set_flags(ctx->param, flags);

 	}

 EXPORT_C int X509_STORE_set_depth(X509_STORE *ctx, int depth)

 	{

 	X509_VERIFY_PARAM_set_depth(ctx->param, depth);

 	return 1;

 	}

 EXPORT_C int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)

 	{

 	return X509_VERIFY_PARAM_set_purpose(ctx->param, purpose);

 	}

 EXPORT_C int X509_STORE_set_trust(X509_STORE *ctx, int trust)

 	{

 	return X509_VERIFY_PARAM_set_trust(ctx->param, trust);

 	}

 EXPORT_C int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)

 	{

 	return X509_VERIFY_PARAM_set1(ctx->param, param);

 	}

 IMPLEMENT_STACK_OF(X509_LOOKUP)

 IMPLEMENT_STACK_OF(X509_OBJECT)