/* apps/req.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.]

 */

/* Until the key-gen callbacks are modified to use newer prototypes, we allow

 * deprecated functions for openssl-internal code */

#ifdef OPENSSL_NO_DEPRECATED

#undef OPENSSL_NO_DEPRECATED

#endif

#include <stdio.h>

#include <stdlib.h>

#include <time.h>

#include <string.h>

#ifdef OPENSSL_NO_STDIO

#define APPS_WIN16

#endif

#include "apps.h"

#include <openssl/bio.h>

#include <openssl/evp.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/asn1.h>

#include <openssl/x509.h>

#include <openssl/x509v3.h>

#include <openssl/objects.h>

#include <openssl/pem.h>

#include <openssl/bn.h>

#ifndef OPENSSL_NO_RSA

#include <openssl/rsa.h>

#endif

#ifndef OPENSSL_NO_DSA

#include <openssl/dsa.h>

#endif

#define SECTION		"req"

#define BITS		"default_bits"

#define KEYFILE		"default_keyfile"

#define PROMPT		"prompt"

#define DISTINGUISHED_NAME	"distinguished_name"

#define ATTRIBUTES	"attributes"

#define V3_EXTENSIONS	"x509_extensions"

#define REQ_EXTENSIONS	"req_extensions"

#define STRING_MASK	"string_mask"

#define UTF8_IN		"utf8"

#define DEFAULT_KEY_LENGTH	512

#define MIN_KEY_LENGTH		384

#undef PROG

#define PROG	req_main

/* -inform arg	- input format - default PEM (DER or PEM)

 * -outform arg - output format - default PEM

 * -in arg	- input file - default stdin

 * -out arg	- output file - default stdout

 * -verify	- check request signature

 * -noout	- don't print stuff out.

 * -text	- print out human readable text.

 * -nodes	- no des encryption

 * -config file	- Load configuration file.

 * -key file	- make a request using key in file (or use it for verification).

 * -keyform arg	- key file format.

 * -rand file(s) - load the file(s) into the PRNG.

 * -newkey	- make a key and a request.

 * -modulus	- print RSA modulus.

 * -pubkey	- output Public Key.

 * -x509	- output a self signed X509 structure instead.

 * -asn1-kludge	- output new certificate request in a format that some CA's

 *		  require.  This format is wrong

 */

static int make_REQ(X509_REQ *req,EVP_PKEY *pkey,char *dn,int mutlirdn,

		int attribs,unsigned long chtype);

static int build_subject(X509_REQ *req, char *subj, unsigned long chtype,

		int multirdn);

static int prompt_info(X509_REQ *req,

		STACK_OF(CONF_VALUE) *dn_sk, char *dn_sect,

		STACK_OF(CONF_VALUE) *attr_sk, char *attr_sect, int attribs,

		unsigned long chtype);

static int auto_info(X509_REQ *req, STACK_OF(CONF_VALUE) *sk,

				STACK_OF(CONF_VALUE) *attr, int attribs,

				unsigned long chtype);

static int add_attribute_object(X509_REQ *req, char *text, const char *def,

				char *value, int nid, int n_min,

				int n_max, unsigned long chtype);

static int add_DN_object(X509_NAME *n, char *text, const char *def, char *value,

	int nid,int n_min,int n_max, unsigned long chtype, int mval);

#ifndef OPENSSL_NO_RSA

static int MS_CALLBACK req_cb(int p, int n, BN_GENCB *cb);

#endif

static int req_check_len(int len,int n_min,int n_max);

static int check_end(const char *str, const char *end);

#ifndef MONOLITH

static char *default_config_file=NULL;

#endif

static CONF *req_conf=NULL;

static int batch=0;

#define TYPE_RSA	1

#define TYPE_DSA	2

#define TYPE_DH		3

#define TYPE_EC		4

int MAIN(int, char **);

int MAIN(int argc, char **argv)

	{

	ENGINE *e = NULL;

#ifndef OPENSSL_NO_DSA

	DSA *dsa_params=NULL;

#endif

#ifndef OPENSSL_NO_ECDSA

	EC_KEY *ec_params = NULL;

#endif

	unsigned long nmflag = 0, reqflag = 0;

	int ex=1,x509=0,days=30;

	X509 *x509ss=NULL;

	X509_REQ *req=NULL;

	EVP_PKEY *pkey=NULL;

	int i=0,badops=0,newreq=0,verbose=0,pkey_type=TYPE_RSA;

	long newkey = -1;

	BIO *in=NULL,*out=NULL;

	int informat,outformat,verify=0,noout=0,text=0,keyform=FORMAT_PEM;

	int nodes=0,kludge=0,newhdr=0,subject=0,pubkey=0;

	char *infile,*outfile,*prog,*keyfile=NULL,*template=NULL,*keyout=NULL;

#ifndef OPENSSL_NO_ENGINE

	char *engine=NULL;

#endif

	char *extensions = NULL;

	char *req_exts = NULL;

	const EVP_CIPHER *cipher=NULL;

	ASN1_INTEGER *serial = NULL;

	int modulus=0;

	char *inrand=NULL;

	char *passargin = NULL, *passargout = NULL;

	char *passin = NULL, *passout = NULL;

	char *p;

	char *subj = NULL;

	int multirdn = 0;

	const EVP_MD *md_alg=NULL,*digest=EVP_sha1();

	unsigned long chtype = MBSTRING_ASC;

#ifndef MONOLITH

	char *to_free;

	long errline;

#endif

	req_conf = NULL;

#ifndef OPENSSL_NO_DES

	cipher=EVP_des_ede3_cbc();

#endif

	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);

	infile=NULL;

	outfile=NULL;

	informat=FORMAT_PEM;

	outformat=FORMAT_PEM;

	prog=argv[0];

	argc--;

	argv++;

	while (argc >= 1)

		{

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

			{

			if (--argc < 1) goto bad;

			informat=str2fmt(*(++argv));

			}

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

			{

			if (--argc < 1) goto bad;

			outformat=str2fmt(*(++argv));

			}

#ifndef OPENSSL_NO_ENGINE

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

			{

			if (--argc < 1) goto bad;

			engine= *(++argv);

			}

#endif

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

			{

			if (--argc < 1) goto bad;

			keyfile= *(++argv);

			}

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

			{

			pubkey=1;

			}

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

			{

			newreq=1;

			}

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

			{	

			if (--argc < 1) goto bad;

			template= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			keyform=str2fmt(*(++argv));

			}

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

			{

			if (--argc < 1) goto bad;

			infile= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			outfile= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			keyout= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			passargin= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			passargout= *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			inrand= *(++argv);

			}

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

			{

			int is_numeric;

			if (--argc < 1) goto bad;

			p= *(++argv);

			is_numeric = p[0] >= '0' && p[0] <= '9';

			if (strncmp("rsa:",p,4) == 0 || is_numeric)

				{

				pkey_type=TYPE_RSA;

				if(!is_numeric)

				    p+=4;

				newkey= atoi(p);

				}

			else

#ifndef OPENSSL_NO_DSA

				if (strncmp("dsa:",p,4) == 0)

				{

				X509 *xtmp=NULL;

				EVP_PKEY *dtmp;

				pkey_type=TYPE_DSA;

				p+=4;

				if ((in=BIO_new_file(p,"r")) == NULL)

					{

					perror(p);

					goto end;

					}

				if ((dsa_params=PEM_read_bio_DSAparams(in,NULL,NULL,NULL)) == NULL)

					{

					ERR_clear_error();

					(void)BIO_reset(in);

					if ((xtmp=PEM_read_bio_X509(in,NULL,NULL,NULL)) == NULL)

						{

						BIO_printf(bio_err,"unable to load DSA parameters from file\n");

						goto end;

						}

					if ((dtmp=X509_get_pubkey(xtmp)) == NULL) goto end;

					if (dtmp->type == EVP_PKEY_DSA)

						dsa_params=DSAparams_dup(dtmp->pkey.dsa);

					EVP_PKEY_free(dtmp);

					X509_free(xtmp);

					if (dsa_params == NULL)

						{

						BIO_printf(bio_err,"Certificate does not contain DSA parameters\n");

						goto end;

						}

					}

				BIO_free(in);

				in=NULL;

				newkey=BN_num_bits(dsa_params->p);

				}

			else 

#endif

#ifndef OPENSSL_NO_ECDSA

				if (strncmp("ec:",p,3) == 0)

				{

				X509 *xtmp=NULL;

				EVP_PKEY *dtmp;

				EC_GROUP *group;

				pkey_type=TYPE_EC;

				p+=3;

				if ((in=BIO_new_file(p,"r")) == NULL)

					{

					perror(p);

					goto end;

					}

				if ((ec_params = EC_KEY_new()) == NULL)

					goto end;

				group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);

				if (group == NULL)

					{

					EC_KEY_free(ec_params);

					ERR_clear_error();

					(void)BIO_reset(in);

					if ((xtmp=PEM_read_bio_X509(in,NULL,NULL,NULL)) == NULL)

						{	

						BIO_printf(bio_err,"unable to load EC parameters from file\n");

						goto end;

						}

					if ((dtmp=X509_get_pubkey(xtmp))==NULL)

						goto end;

					if (dtmp->type == EVP_PKEY_EC)

						ec_params = EC_KEY_dup(dtmp->pkey.ec);

					EVP_PKEY_free(dtmp);

					X509_free(xtmp);

					if (ec_params == NULL)

						{

						BIO_printf(bio_err,"Certificate does not contain EC parameters\n");

						goto end;

						}

					}

				else

					{

					if (EC_KEY_set_group(ec_params, group) == 0)

						goto end;

					EC_GROUP_free(group);

					}

				BIO_free(in);

				in=NULL;

				newkey = EC_GROUP_get_degree(EC_KEY_get0_group(ec_params));

				}

			else

#endif

#ifndef OPENSSL_NO_DH

				if (strncmp("dh:",p,4) == 0)

				{

				pkey_type=TYPE_DH;

				p+=3;

				}

			else

#endif

				{

				goto bad;

				}

			newreq=1;

			}

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

			batch=1;

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

			newhdr=1;

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

			modulus=1;

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

			verify=1;

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

			nodes=1;

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

			noout=1;

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

			verbose=1;

		else if (strcmp(*argv,"-utf8") == 0)

			chtype = MBSTRING_UTF8;

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

			{

			if (--argc < 1) goto bad;

			if (!set_name_ex(&nmflag, *(++argv))) goto bad;

			}

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

			{

			if (--argc < 1) goto bad;

			if (!set_cert_ex(&reqflag, *(++argv))) goto bad;

			}

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

			subject=1;

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

			text=1;

		else if (strcmp(*argv,"-x509") == 0)

			x509=1;

		else if (strcmp(*argv,"-asn1-kludge") == 0)

			kludge=1;

		else if (strcmp(*argv,"-no-asn1-kludge") == 0)

			kludge=0;

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

			{

			if (--argc < 1) goto bad;

			subj= *(++argv);

			}

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

			multirdn=1;

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

			{

			if (--argc < 1) goto bad;

			days= atoi(*(++argv));

			if (days == 0) days=30;

			}

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

			{

			if (--argc < 1) goto bad;

			serial = s2i_ASN1_INTEGER(NULL, *(++argv));

			if (!serial) goto bad;

			}

		else if ((md_alg=EVP_get_digestbyname(&((*argv)[1]))) != NULL)

			{

			/* ok */

			digest=md_alg;

			}

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

			{

			if (--argc < 1) goto bad;

			extensions = *(++argv);

			}

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

			{

			if (--argc < 1) goto bad;

			req_exts = *(++argv);

			}

		else

			{

			BIO_printf(bio_err,"unknown option %s\n",*argv);

			badops=1;

			break;

			}

		argc--;

		argv++;

		}

	if (badops)

		{

bad:

		BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);

		BIO_printf(bio_err,"where options  are\n");

		BIO_printf(bio_err," -inform arg    input format - DER or PEM\n");

		BIO_printf(bio_err," -outform arg   output format - DER or PEM\n");

		BIO_printf(bio_err," -in arg        input file\n");

		BIO_printf(bio_err," -out arg       output file\n");

		BIO_printf(bio_err," -text          text form of request\n");

		BIO_printf(bio_err," -pubkey        output public key\n");

		BIO_printf(bio_err," -noout         do not output REQ\n");

		BIO_printf(bio_err," -verify        verify signature on REQ\n");

		BIO_printf(bio_err," -modulus       RSA modulus\n");

		BIO_printf(bio_err," -nodes         don't encrypt the output key\n");

#ifndef OPENSSL_NO_ENGINE

		BIO_printf(bio_err," -engine e      use engine e, possibly a hardware device\n");

#endif

		BIO_printf(bio_err," -subject       output the request's subject\n");

		BIO_printf(bio_err," -passin        private key password source\n");

		BIO_printf(bio_err," -key file      use the private key contained in file\n");

		BIO_printf(bio_err," -keyform arg   key file format\n");

		BIO_printf(bio_err," -keyout arg    file to send the key to\n");

		BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);

		BIO_printf(bio_err,"                load the file (or the files in the directory) into\n");

		BIO_printf(bio_err,"                the random number generator\n");

		BIO_printf(bio_err," -newkey rsa:bits generate a new RSA key of 'bits' in size\n");

		BIO_printf(bio_err," -newkey dsa:file generate a new DSA key, parameters taken from CA in 'file'\n");

#ifndef OPENSSL_NO_ECDSA

		BIO_printf(bio_err," -newkey ec:file generate a new EC key, parameters taken from CA in 'file'\n");

#endif

		BIO_printf(bio_err," -[digest]      Digest to sign with (md5, sha1, md2, mdc2, md4)\n");