char *inmode = "r", *outmode = "w";
const char *inmode = "r", *outmode = "w";
int MAIN(int argc, char **argv)	{	ENGINE *e = NULL;	int operation = 0;	int ret = 0;	char **args;	char *inmode = "r", *outmode = "w";	char *infile = NULL, *outfile = NULL;	char *signerfile = NULL, *recipfile = NULL;	char *certfile = NULL, *keyfile = NULL, *contfile=NULL;	const EVP_CIPHER *cipher = NULL;	PKCS7 *p7 = NULL;	X509_STORE *store = NULL;	X509 *cert = NULL, *recip = NULL, *signer = NULL;	EVP_PKEY *key = NULL;	STACK_OF(X509) *encerts = NULL, *other = NULL;	BIO *in = NULL, *out = NULL, *indata = NULL;	int badarg = 0;	int flags = PKCS7_DETACHED;	char *to = NULL, *from = NULL, *subject = NULL;	char *CAfile = NULL, *CApath = NULL;	char *passargin = NULL, *passin = NULL;	char *inrand = NULL;	int need_rand = 0;	int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;        int keyform = FORMAT_PEM;#ifndef OPENSSL_NO_ENGINE	char *engine=NULL;#endif	X509_VERIFY_PARAM *vpm = NULL;	args = argv + 1;	ret = 1;	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;	while (!badarg && *args && *args[0] == '-')		{		if (!strcmp (*args, "-encrypt"))			operation = SMIME_ENCRYPT;		else if (!strcmp (*args, "-decrypt"))			operation = SMIME_DECRYPT;		else if (!strcmp (*args, "-sign"))			operation = SMIME_SIGN;		else if (!strcmp (*args, "-verify"))			operation = SMIME_VERIFY;		else if (!strcmp (*args, "-pk7out"))			operation = SMIME_PK7OUT;#ifndef OPENSSL_NO_DES		else if (!strcmp (*args, "-des3")) 				cipher = EVP_des_ede3_cbc();		else if (!strcmp (*args, "-des")) 				cipher = EVP_des_cbc();#endif#ifndef OPENSSL_NO_RC2		else if (!strcmp (*args, "-rc2-40")) 				cipher = EVP_rc2_40_cbc();		else if (!strcmp (*args, "-rc2-128")) 				cipher = EVP_rc2_cbc();		else if (!strcmp (*args, "-rc2-64")) 				cipher = EVP_rc2_64_cbc();#endif#ifndef OPENSSL_NO_AES		else if (!strcmp(*args,"-aes128"))				cipher = EVP_aes_128_cbc();		else if (!strcmp(*args,"-aes192"))				cipher = EVP_aes_192_cbc();		else if (!strcmp(*args,"-aes256"))				cipher = EVP_aes_256_cbc();#endif		else if (!strcmp (*args, "-text")) 				flags |= PKCS7_TEXT;		else if (!strcmp (*args, "-nointern")) 				flags |= PKCS7_NOINTERN;		else if (!strcmp (*args, "-noverify")) 				flags |= PKCS7_NOVERIFY;		else if (!strcmp (*args, "-nochain")) 				flags |= PKCS7_NOCHAIN;		else if (!strcmp (*args, "-nocerts")) 				flags |= PKCS7_NOCERTS;		else if (!strcmp (*args, "-noattr")) 				flags |= PKCS7_NOATTR;		else if (!strcmp (*args, "-nodetach")) 				flags &= ~PKCS7_DETACHED;		else if (!strcmp (*args, "-nosmimecap"))				flags |= PKCS7_NOSMIMECAP;		else if (!strcmp (*args, "-binary"))				flags |= PKCS7_BINARY;		else if (!strcmp (*args, "-nosigs"))				flags |= PKCS7_NOSIGS;		else if (!strcmp (*args, "-nooldmime"))				flags |= PKCS7_NOOLDMIMETYPE;		else if (!strcmp (*args, "-crlfeol"))				flags |= PKCS7_CRLFEOL;		else if (!strcmp(*args,"-rand"))			{			if (args[1])				{				args++;				inrand = *args;				}			else				badarg = 1;			need_rand = 1;			}#ifndef OPENSSL_NO_ENGINE		else if (!strcmp(*args,"-engine"))			{			if (args[1])				{				args++;				engine = *args;				}			else badarg = 1;			}#endif		else if (!strcmp(*args,"-passin"))			{			if (args[1])				{				args++;				passargin = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-to"))			{			if (args[1])				{				args++;				to = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-from"))			{			if (args[1])				{				args++;				from = *args;				}			else badarg = 1;			}		else if (!strcmp (*args, "-subject"))			{			if (args[1])				{				args++;				subject = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-signer"))			{			if (args[1])				{				args++;				signerfile = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-recip"))			{			if (args[1])				{				args++;				recipfile = *args;				}			else badarg = 1;			}		else if (!strcmp (*args, "-inkey"))			{			if (args[1])				{				args++;				keyfile = *args;				}			else				badarg = 1;		}		else if (!strcmp (*args, "-keyform"))			{			if (args[1])				{				args++;				keyform = str2fmt(*args);				}			else				badarg = 1;			}		else if (!strcmp (*args, "-certfile"))			{			if (args[1])				{				args++;				certfile = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-CAfile"))			{			if (args[1])				{				args++;				CAfile = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-CApath"))			{			if (args[1])				{				args++;				CApath = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-in"))			{			if (args[1])				{				args++;				infile = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-inform"))			{			if (args[1])				{				args++;				informat = str2fmt(*args);				}			else				badarg = 1;			}		else if (!strcmp (*args, "-outform"))			{			if (args[1])				{				args++;				outformat = str2fmt(*args);				}			else				badarg = 1;			}		else if (!strcmp (*args, "-out"))			{			if (args[1])				{				args++;				outfile = *args;				}			else				badarg = 1;			}		else if (!strcmp (*args, "-content"))			{			if (args[1])				{				args++;				contfile = *args;				}			else				badarg = 1;			}		else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))			continue;		else			badarg = 1;		args++;		}	if (operation == SMIME_SIGN)		{		if (!signerfile)			{			BIO_printf(bio_err, "No signer certificate specified\n");			badarg = 1;			}		need_rand = 1;		}	else if (operation == SMIME_DECRYPT)		{		if (!recipfile)			{			BIO_printf(bio_err, "No recipient certificate and key specified\n");			badarg = 1;			}		}	else if (operation == SMIME_ENCRYPT)		{		if (!*args)			{			BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");			badarg = 1;			}		need_rand = 1;		}	else if (!operation)		badarg = 1;	if (badarg)		{		BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");		BIO_printf (bio_err, "where options are\n");		BIO_printf (bio_err, "-encrypt       encrypt message\n");		BIO_printf (bio_err, "-decrypt       decrypt encrypted message\n");		BIO_printf (bio_err, "-sign          sign message\n");		BIO_printf (bio_err, "-verify        verify signed message\n");		BIO_printf (bio_err, "-pk7out        output PKCS#7 structure\n");#ifndef OPENSSL_NO_DES		BIO_printf (bio_err, "-des3          encrypt with triple DES\n");		BIO_printf (bio_err, "-des           encrypt with DES\n");#endif#ifndef OPENSSL_NO_RC2		BIO_printf (bio_err, "-rc2-40        encrypt with RC2-40 (default)\n");		BIO_printf (bio_err, "-rc2-64        encrypt with RC2-64\n");		BIO_printf (bio_err, "-rc2-128       encrypt with RC2-128\n");#endif#ifndef OPENSSL_NO_AES		BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");		BIO_printf (bio_err, "               encrypt PEM output with cbc aes\n");#endif		BIO_printf (bio_err, "-nointern      don't search certificates in message for signer\n");		BIO_printf (bio_err, "-nosigs        don't verify message signature\n");		BIO_printf (bio_err, "-noverify      don't verify signers certificate\n");		BIO_printf (bio_err, "-nocerts       don't include signers certificate when signing\n");		BIO_printf (bio_err, "-nodetach      use opaque signing\n");		BIO_printf (bio_err, "-noattr        don't include any signed attributes\n");		BIO_printf (bio_err, "-binary        don't translate message to text\n");		BIO_printf (bio_err, "-certfile file other certificates file\n");		BIO_printf (bio_err, "-signer file   signer certificate file\n");		BIO_printf (bio_err, "-recip  file   recipient certificate file for decryption\n");		BIO_printf (bio_err, "-in file       input file\n");		BIO_printf (bio_err, "-inform arg    input format SMIME (default), PEM or DER\n");		BIO_printf (bio_err, "-inkey file    input private key (if not signer or recipient)\n");		BIO_printf (bio_err, "-keyform arg   input private key format (PEM or ENGINE)\n");		BIO_printf (bio_err, "-out file      output file\n");		BIO_printf (bio_err, "-outform arg   output format SMIME (default), PEM or DER\n");		BIO_printf (bio_err, "-content file  supply or override content for detached signature\n");		BIO_printf (bio_err, "-to addr       to address\n");		BIO_printf (bio_err, "-from ad       from address\n");		BIO_printf (bio_err, "-subject s     subject\n");		BIO_printf (bio_err, "-text          include or delete text MIME headers\n");		BIO_printf (bio_err, "-CApath dir    trusted certificates directory\n");		BIO_printf (bio_err, "-CAfile file   trusted certificates file\n");		BIO_printf (bio_err, "-crl_check     check revocation status of signer's certificate using CRLs\n");		BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");#ifndef OPENSSL_NO_ENGINE		BIO_printf (bio_err, "-engine e      use engine e, possibly a hardware device.\n");#endif		BIO_printf (bio_err, "-passin arg    input file pass phrase source\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, "cert.pem       recipient certificate(s) for encryption\n");		goto end;		}#ifndef OPENSSL_NO_ENGINE        e = setup_engine(bio_err, engine, 0);#endif	if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))		{		BIO_printf(bio_err, "Error getting password\n");		goto end;		}	if (need_rand)		{		app_RAND_load_file(NULL, bio_err, (inrand != NULL));		if (inrand != NULL)			BIO_printf(bio_err,"%ld semi-random bytes loaded\n",				app_RAND_load_files(inrand));		}	ret = 2;	if (operation != SMIME_SIGN)		flags &= ~PKCS7_DETACHED;	if (operation & SMIME_OP)		{		if (flags & PKCS7_BINARY)			inmode = "rb";		if (outformat == FORMAT_ASN1)			outmode = "wb";		}	else		{		if (flags & PKCS7_BINARY)			outmode = "wb";		if (informat == FORMAT_ASN1)			inmode = "rb";		}	if (operation == SMIME_ENCRYPT)		{		if (!cipher)			{#ifndef OPENSSL_NO_RC2						cipher = EVP_rc2_40_cbc();#else			BIO_printf(bio_err, "No cipher selected\n");			goto end;#endif			}		encerts = sk_X509_new_null();		while (*args)			{			if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,				NULL, e, "recipient certificate file")))				{#if 0				/* An appropriate message is already printed */				BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);#endif				goto end;				}			sk_X509_push(encerts, cert);			cert = NULL;			args++;			}		}	if (signerfile && (operation == SMIME_SIGN))		{		if (!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,			e, "signer certificate")))			{#if 0			/* An appropri message has already been printed */			BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);#endif			goto end;			}		}	if (certfile)		{		if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,			e, "certificate file")))			{#if 0			/* An appropriate message has already been printed */			BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);#endif			ERR_print_errors(bio_err);			goto end;			}		}	if (recipfile && (operation == SMIME_DECRYPT))		{		if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,			e, "recipient certificate file")))			{#if 0			/* An appropriate message has alrady been printed */			BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);#endif			ERR_print_errors(bio_err);			goto end;			}		}	if (operation == SMIME_DECRYPT)		{		if (!keyfile)			keyfile = recipfile;		}	else if (operation == SMIME_SIGN)		{		if (!keyfile)			keyfile = signerfile;		}	else keyfile = NULL;	if (keyfile)		{		key = load_key(bio_err, keyfile, keyform, 0, passin, e,			       "signing key file");		if (!key)			goto end;		}	if (infile)		{		if (!(in = BIO_new_file(infile, inmode)))			{			BIO_printf (bio_err,				 "Can't open input file %s\n", infile);			goto end;			}		}	else		in = BIO_new_fp(stdin, BIO_NOCLOSE);	if (outfile)		{		if (!(out = BIO_new_file(outfile, outmode)))			{			BIO_printf (bio_err,				 "Can't open output file %s\n", outfile);			goto end;			}		}	else		{		out = BIO_new_fp(stdout, BIO_NOCLOSE);#ifdef OPENSSL_SYS_VMS		{		    BIO *tmpbio = BIO_new(BIO_f_linebuffer());		    out = BIO_push(tmpbio, out);		}#endif		}	if (operation == SMIME_VERIFY)		{		if (!(store = setup_verify(bio_err, CAfile, CApath)))			goto end;		X509_STORE_set_verify_cb_func(store, smime_cb);		if (vpm)			X509_STORE_set1_param(store, vpm);		}	ret = 3;	if (operation == SMIME_ENCRYPT)		p7 = PKCS7_encrypt(encerts, in, cipher, flags);	else if (operation == SMIME_SIGN)		{		/* If detached data and SMIME output enable partial		 * signing.		 */		if ((flags & PKCS7_DETACHED) && (outformat == FORMAT_SMIME))			flags |= PKCS7_STREAM;		p7 = PKCS7_sign(signer, key, other, in, flags);		/* Don't need to rewind for partial signing */		if (!(flags & PKCS7_STREAM) && (BIO_reset(in) != 0))			{			BIO_printf(bio_err, "Can't rewind input file\n");			goto end;			}		}	else		{		if (informat == FORMAT_SMIME) 			p7 = SMIME_read_PKCS7(in, &indata);		else if (informat == FORMAT_PEM) 			p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);		else if (informat == FORMAT_ASN1) 			p7 = d2i_PKCS7_bio(in, NULL);		else			{			BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");			goto end;			}		if (!p7)			{			BIO_printf(bio_err, "Error reading S/MIME message\n");			goto end;			}		if (contfile)			{			BIO_free(indata);			if (!(indata = BIO_new_file(contfile, "rb")))				{				BIO_printf(bio_err, "Can't read content file %s\n", contfile);				goto end;				}			}		}	if (!p7)		{		BIO_printf(bio_err, "Error creating PKCS#7 structure\n");		goto end;		}	ret = 4;	if (operation == SMIME_DECRYPT)		{		if (!PKCS7_decrypt(p7, key, recip, out, flags))			{			BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");			goto end;			}		}	else if (operation == SMIME_VERIFY)		{		STACK_OF(X509) *signers;		if (PKCS7_verify(p7, other, store, indata, out, flags))			BIO_printf(bio_err, "Verification successful\n");		else			{			BIO_printf(bio_err, "Verification failure\n");			goto end;			}		signers = PKCS7_get0_signers(p7, other, flags);		if (!save_certs(signerfile, signers))			{			BIO_printf(bio_err, "Error writing signers to %s\n",								signerfile);			ret = 5;			goto end;			}		sk_X509_free(signers);		}	else if (operation == SMIME_PK7OUT)		PEM_write_bio_PKCS7(out, p7);	else		{		if (to)			BIO_printf(out, "To: %s\n", to);		if (from)			BIO_printf(out, "From: %s\n", from);		if (subject)			BIO_printf(out, "Subject: %s\n", subject);		if (outformat == FORMAT_SMIME) 			SMIME_write_PKCS7(out, p7, in, flags);		else if (outformat == FORMAT_PEM) 			PEM_write_bio_PKCS7(out,p7);		else if (outformat == FORMAT_ASN1) 			i2d_PKCS7_bio(out,p7);		else			{			BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");			goto end;			}		}	ret = 0;end:	if (need_rand)		app_RAND_write_file(NULL, bio_err);	if (ret) ERR_print_errors(bio_err);	sk_X509_pop_free(encerts, X509_free);	sk_X509_pop_free(other, X509_free);	if (vpm)		X509_VERIFY_PARAM_free(vpm);	X509_STORE_free(store);	X509_free(cert);	X509_free(recip);	X509_free(signer);	EVP_PKEY_free(key);	PKCS7_free(p7);	BIO_free(in);	BIO_free(indata);	BIO_free_all(out);	if (passin) OPENSSL_free(passin);	return (ret);}