/* 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>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;	}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);	}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;	}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;	}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;	}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);	}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);	}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);	}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;	}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;	ret->purpose = 0;	ret->trust = 0;	ret->flags = 0;	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;	ret->depth=0;	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);	}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);	OPENSSL_free(vfy);	}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;			}		}	}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;	}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;	}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;	}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;		}	}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;		}	}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);	}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);}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. */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_VERIFY_CERT,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;}void X509_STORE_set_flags(X509_STORE *ctx, long flags)	{	ctx->flags |= flags;	}int X509_STORE_set_purpose(X509_STORE *ctx, int purpose)	{	return X509_PURPOSE_set(&ctx->purpose, purpose);	}int X509_STORE_set_trust(X509_STORE *ctx, int trust)	{	return X509_TRUST_set(&ctx->trust, trust);	}IMPLEMENT_STACK_OF(X509_LOOKUP)IMPLEMENT_STACK_OF(X509_OBJECT)