else if (!strcmp (*args, "-nooldmime")) flags |= PKCS7_NOOLDMIMETYPE; else if (!strcmp (*args, "-crlfeol")) flags |= PKCS7_CRLFEOL;
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, store_flags = 0;	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	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, "-crl_check"))				store_flags |= X509_V_FLAG_CRL_CHECK;		else if (!strcmp (*args, "-crl_check_all"))				store_flags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;		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 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_flags(store, store_flags);	}	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);	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);}