/* apps/verify.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 <stdlib.h>

 #include <string.h>

 #include "apps.h"

 #include <openssl/bio.h>

 #include <openssl/err.h>

 #include <openssl/x509.h>

 #include <openssl/x509v3.h>

 #include <openssl/pem.h>

 #undef PROG

 #define PROG	verify_main

 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);

 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e);

 static STACK_OF(X509) *load_untrusted(char *file);

 static int v_verbose=0, vflags = 0;

 int MAIN(int, char **);

 int MAIN(int argc, char **argv)

 	{

 	ENGINE *e = NULL;

 	int i,ret=1, badarg = 0;

 	int purpose = -1;

 	char *CApath=NULL,*CAfile=NULL;

 	char *untfile = NULL, *trustfile = NULL;

 	STACK_OF(X509) *untrusted = NULL, *trusted = NULL;

 	X509_STORE *cert_ctx=NULL;

 	X509_LOOKUP *lookup=NULL;

 	X509_VERIFY_PARAM *vpm = NULL;

 #ifndef OPENSSL_NO_ENGINE

 	char *engine=NULL;

 #endif

 	cert_ctx=X509_STORE_new();

 	if (cert_ctx == NULL) goto end;

 	X509_STORE_set_verify_cb_func(cert_ctx,cb);

 	ERR_load_crypto_strings();

 	apps_startup();

 	if (bio_err == NULL)

 		if ((bio_err=BIO_new(BIO_s_file())) != NULL)

 			BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

 	if (!load_config(bio_err, NULL))

 		goto end;

 	argc--;

 	argv++;

 	for (;;)

 		{

 		if (argc >= 1)

 			{

 			if (strcmp(*argv,"-CApath") == 0)

 				{

 				if (argc-- < 1) goto end;

 				CApath= *(++argv);

 				}

 			else if (strcmp(*argv,"-CAfile") == 0)

 				{

 				if (argc-- < 1) goto end;

 				CAfile= *(++argv);

 				}

 			else if (args_verify(&argv, &argc, &badarg, bio_err,

 									&vpm))

 				{

 				if (badarg)

 					goto end;

 				continue;

 				}

 			else if (strcmp(*argv,"-untrusted") == 0)

 				{

 				if (argc-- < 1) goto end;

 				untfile= *(++argv);

 				}

 			else if (strcmp(*argv,"-trusted") == 0)

 				{

 				if (argc-- < 1) goto end;

 				trustfile= *(++argv);

 				}

 #ifndef OPENSSL_NO_ENGINE

 			else if (strcmp(*argv,"-engine") == 0)

 				{

 				if (--argc < 1) goto end;

 				engine= *(++argv);

 				}

 #endif

 			else if (strcmp(*argv,"-help") == 0)

 				goto end;

 			else if (strcmp(*argv,"-verbose") == 0)

 				v_verbose=1;

 			else if (argv[0][0] == '-')

 				goto end;

 			else

 				break;

 			argc--;

 			argv++;

 			}

 		else

 			break;

 		}

 #ifndef OPENSSL_NO_ENGINE

         e = setup_engine(bio_err, engine, 0);

 #endif

 	if (vpm)

 		X509_STORE_set1_param(cert_ctx, vpm);

 	lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());

 	if (lookup == NULL) abort();

 	if (CAfile) {

 		i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);

 		if(!i) {

 			BIO_printf(bio_err, "Error loading file %s\n", CAfile);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 	} else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);

 	lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());

 	if (lookup == NULL) abort();

 	if (CApath) {

 		i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);

 		if(!i) {

 			BIO_printf(bio_err, "Error loading directory %s\n", CApath);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 	} else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);

 	ERR_clear_error();

 	if(untfile) {

 		if(!(untrusted = load_untrusted(untfile))) {

 			BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 	}

 	if(trustfile) {

 		if(!(trusted = load_untrusted(trustfile))) {

 			BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);

 			ERR_print_errors(bio_err);

 			goto end;

 		}

 	}

 	if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose, e);

 	else

 		for (i=0; i<argc; i++)

 			check(cert_ctx,argv[i], untrusted, trusted, purpose, e);

 	ret=0;

 end:

 	if (ret == 1) {

 		BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] [-crl_check]");

 #ifndef OPENSSL_NO_ENGINE

 		BIO_printf(bio_err," [-engine e]");

 #endif

 		BIO_printf(bio_err," cert1 cert2 ...\n");

 		BIO_printf(bio_err,"recognized usages:\n");

 		for(i = 0; i < X509_PURPOSE_get_count(); i++) {

 			X509_PURPOSE *ptmp;

 			ptmp = X509_PURPOSE_get0(i);

 			BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),

 								X509_PURPOSE_get0_name(ptmp));

 		}

 	}

 	if (vpm) X509_VERIFY_PARAM_free(vpm);

 	if (cert_ctx != NULL) X509_STORE_free(cert_ctx);

 	sk_X509_pop_free(untrusted, X509_free);

 	sk_X509_pop_free(trusted, X509_free);

 	apps_shutdown();

 	OPENSSL_EXIT(ret);

 	}

 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose, ENGINE *e)

 	{

 	X509 *x=NULL;

 	int i=0,ret=0;

 	X509_STORE_CTX *csc;

 	x = load_cert(bio_err, file, FORMAT_PEM, NULL, e, "certificate file");

 	if (x == NULL)

 		goto end;

 	fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);

 	csc = X509_STORE_CTX_new();

 	if (csc == NULL)

 		{

 		ERR_print_errors(bio_err);

 		goto end;

 		}

 	X509_STORE_set_flags(ctx, vflags);

 	if(!X509_STORE_CTX_init(csc,ctx,x,uchain))

 		{

 		ERR_print_errors(bio_err);

 		goto end;

 		}

 	if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);

 	if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);

 	i=X509_verify_cert(csc);

 	X509_STORE_CTX_free(csc);

 	ret=0;

 end:

 	if (i)

 		{

 		fprintf(stdout,"OK\n");

   	ret=1;

 		}

 	else

 		ERR_print_errors(bio_err);

 	if (x != NULL) X509_free(x);

 	return(ret);

 	}

 static STACK_OF(X509) *load_untrusted(char *certfile)

 {

 	STACK_OF(X509_INFO) *sk=NULL;

 	STACK_OF(X509) *stack=NULL, *ret=NULL;

 	BIO *in=NULL;

 	X509_INFO *xi;

 	if(!(stack = sk_X509_new_null())) {

 		BIO_printf(bio_err,"memory allocation failure\n");

 		goto end;

 	}

 	if(!(in=BIO_new_file(certfile, "r"))) {

 		BIO_printf(bio_err,"error opening the file, %s\n",certfile);

 		goto end;

 	}

 	/* This loads from a file, a stack of x509/crl/pkey sets */

 	if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {

 		BIO_printf(bio_err,"error reading the file, %s\n",certfile);

 		goto end;

 	}

 	/* scan over it and pull out the certs */

 	while (sk_X509_INFO_num(sk))

 		{

 		xi=sk_X509_INFO_shift(sk);

 		if (xi->x509 != NULL)

 			{

 			sk_X509_push(stack,xi->x509);

 			xi->x509=NULL;

 			}

 		X509_INFO_free(xi);

 		}

 	if(!sk_X509_num(stack)) {

 		BIO_printf(bio_err,"no certificates in file, %s\n",certfile);

 		sk_X509_free(stack);

 		goto end;

 	}

 	ret=stack;

 end:

 	BIO_free(in);

 	sk_X509_INFO_free(sk);

 	return(ret);

 	}

 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)

 	{

 	char buf[256];

 	if (!ok)

 		{

 		if (ctx->current_cert)

 			{

 			X509_NAME_oneline(

 				X509_get_subject_name(ctx->current_cert),buf,

 				sizeof buf);

 			printf("%s\n",buf);

 			}

 		printf("error %d at %d depth lookup:%s\n",ctx->error,

 			ctx->error_depth,

 			X509_verify_cert_error_string(ctx->error));

 		if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;

 		/* since we are just checking the certificates, it is

 		 * ok if they are self signed. But we should still warn

 		 * the user.

  		 */

 		if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;

 		/* Continue after extension errors too */

 		if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;

 		if (ctx->error == X509_V_ERR_INVALID_NON_CA) ok=1;

 		if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;

 		if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;

 		if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;

 		if (ctx->error == X509_V_ERR_CRL_HAS_EXPIRED) ok=1;

 		if (ctx->error == X509_V_ERR_CRL_NOT_YET_VALID) ok=1;

 		if (ctx->error == X509_V_ERR_UNHANDLED_CRITICAL_EXTENSION) ok=1;

 		if (ctx->error == X509_V_ERR_NO_EXPLICIT_POLICY)

 			policies_print(NULL, ctx);

 		return ok;

 		}

 	if ((ctx->error == X509_V_OK) && (ok == 2))

 		policies_print(NULL, ctx);

 	if (!v_verbose)

 		ERR_clear_error();

 	return(ok);

 	}